Merge tag 'tty-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial updates from Greg KH:
 "Here is the big tty/serial driver pull request for 4.15-rc1.

  Lots of serial driver updates in here, some small vt cleanups, and a
  raft of SPDX and license boilerplate cleanups, messing up the diffstat
  a bit.

  Nothing major, with no realy functional changes except better hardware
  support for some platforms.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (110 commits)
  tty: ehv_bytechan: fix spelling mistake
  tty: serial: meson: allow baud-rates lower than 9600
  serial: 8250_fintek: Fix crash with baud rate B0
  serial: 8250_fintek: Disable delays for ports != 0
  serial: 8250_fintek: Return -EINVAL on invalid configuration
  tty: Remove redundant license text
  tty: serdev: Remove redundant license text
  tty: hvc: Remove redundant license text
  tty: serial: Remove redundant license text
  tty: add SPDX identifiers to all remaining files in drivers/tty/
  tty: serial: jsm: remove redundant pointer ts
  tty: serial: jsm: add space before the open parenthesis '('
  tty: serial: jsm: fix coding style
  tty: serial: jsm: delete space between function name and '('
  tty: serial: jsm: add blank line after declarations
  tty: serial: jsm: change the type of local variable
  tty: serial: imx: remove dead code imx_dma_rxint
  tty: serial: imx: disable ageing timer interrupt if dma in use
  serial: 8250: fix potential deadlock in rs485-mode
  serial: m32r_sio: Drop redundant .data assignment
  ...

188 files changed, 1242 insertions, 1644 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 81367edc8a10..e14e964bfe6d 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1505,41 +1505,38 @@ static void acpi_init_coherency(struct acpi_device *adev)
 	adev->flags.coherent_dma = cca;
 }
 
-static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data)
+static int acpi_check_serial_bus_slave(struct acpi_resource *ares, void *data)
 {
-	bool *is_spi_i2c_slave_p = data;
+	bool *is_serial_bus_slave_p = data;
 
 	if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
 		return 1;
 
-	/*
-	 * devices that are connected to UART still need to be enumerated to
-	 * platform bus
-	 */
-	if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
-		*is_spi_i2c_slave_p = true;
+	*is_serial_bus_slave_p = true;
 
 	 /* no need to do more checking */
 	return -1;
 }
 
-static bool acpi_is_spi_i2c_slave(struct acpi_device *device)
+static bool acpi_is_serial_bus_slave(struct acpi_device *device)
 {
 	struct list_head resource_list;
-	bool is_spi_i2c_slave = false;
+	bool is_serial_bus_slave = false;
 
 	/* Macs use device properties in lieu of _CRS resources */
 	if (x86_apple_machine &&
 	    (fwnode_property_present(&device->fwnode, "spiSclkPeriod") ||
-	     fwnode_property_present(&device->fwnode, "i2cAddress")))
+	     fwnode_property_present(&device->fwnode, "i2cAddress") ||
+	     fwnode_property_present(&device->fwnode, "baud")))
 		return true;
 
 	INIT_LIST_HEAD(&resource_list);
-	acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave,
-			       &is_spi_i2c_slave);
+	acpi_dev_get_resources(device, &resource_list,
+			       acpi_check_serial_bus_slave,
+			       &is_serial_bus_slave);
 	acpi_dev_free_resource_list(&resource_list);
 
-	return is_spi_i2c_slave;
+	return is_serial_bus_slave;
 }
 
 void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
@@ -1557,7 +1554,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
 	acpi_bus_get_flags(device);
 	device->flags.match_driver = false;
 	device->flags.initialized = true;
-	device->flags.spi_i2c_slave = acpi_is_spi_i2c_slave(device);
+	device->flags.serial_bus_slave = acpi_is_serial_bus_slave(device);
 	acpi_device_clear_enumerated(device);
 	device_initialize(&device->dev);
 	dev_set_uevent_suppress(&device->dev, true);
@@ -1841,10 +1838,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
 static void acpi_default_enumeration(struct acpi_device *device)
 {
 	/*
-	 * Do not enumerate SPI/I2C slaves as they will be enumerated by their
-	 * respective parents.
+	 * Do not enumerate SPI/I2C/UART slaves as they will be enumerated by
+	 * their respective parents.
 	 */
-	if (!device->flags.spi_i2c_slave) {
+	if (!device->flags.serial_bus_slave) {
 		acpi_create_platform_device(device, NULL);
 		acpi_device_set_enumerated(device);
 	} else {
@@ -1941,7 +1938,7 @@ static void acpi_bus_attach(struct acpi_device *device)
 		return;
 
 	device->flags.match_driver = true;
-	if (ret > 0 && !device->flags.spi_i2c_slave) {
+	if (ret > 0 && !device->flags.serial_bus_slave) {
 		acpi_device_set_enumerated(device);
 		goto ok;
 	}
@@ -1950,7 +1947,7 @@ static void acpi_bus_attach(struct acpi_device *device)
 	if (ret < 0)
 		return;
 
-	if (!device->pnp.type.platform_id && !device->flags.spi_i2c_slave)
+	if (!device->pnp.type.platform_id && !device->flags.serial_bus_slave)
 		acpi_device_set_enumerated(device);
 	else
 		acpi_default_enumeration(device);
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 9820e20993db..32d7ce430b02 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Serial driver for the amiga builtin port.
  *
diff --git a/drivers/tty/bfin_jtag_comm.c b/drivers/tty/bfin_jtag_comm.c
index ce24182f8514..c369bf27a67b 100644
--- a/drivers/tty/bfin_jtag_comm.c
+++ b/drivers/tty/bfin_jtag_comm.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * TTY over Blackfin JTAG Communication
  *
  * Copyright 2008-2009 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
  */
 
 #define DRV_NAME "bfin-jtag-comm"
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index dac8a1a8e4ac..5d442469c95e 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #undef	BLOCKMOVE
 #define	Z_WAKE
 #undef	Z_EXT_CHARS_IN_BUFFER
@@ -286,8 +287,7 @@ static long cyz_polling_cycle = CZ_DEF_POLL;
 static DEFINE_TIMER(cyz_timerlist, cyz_poll);
 
 #else				/* CONFIG_CYZ_INTR */
-static void cyz_rx_restart(unsigned long);
-static struct timer_list cyz_rx_full_timer[NR_PORTS];
+static void cyz_rx_restart(struct timer_list *);
 #endif				/* CONFIG_CYZ_INTR */
 
 static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
@@ -992,10 +992,8 @@ static void cyz_handle_rx(struct cyclades_port *info)
 	else
 		char_count = rx_put - rx_get + rx_bufsize;
 	if (char_count >= readl(&buf_ctrl->rx_threshold) &&
-			!timer_pending(&cyz_rx_full_timer[
-					info->line]))
-		mod_timer(&cyz_rx_full_timer[info->line],
-				jiffies + 1);
+			!timer_pending(&info->rx_full_timer))
+		mod_timer(&info->rx_full_timer, jiffies + 1);
 #endif
 	info->idle_stats.recv_idle = jiffies;
 	tty_schedule_flip(&info->port);
@@ -1197,9 +1195,9 @@ static irqreturn_t cyz_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }				/* cyz_interrupt */
 
-static void cyz_rx_restart(unsigned long arg)
+static void cyz_rx_restart(struct timer_list *t)
 {
-	struct cyclades_port *info = (struct cyclades_port *)arg;
+	struct cyclades_port *info = from_timer(info, t, rx_full_timer);
 	struct cyclades_card *card = info->card;
 	int retval;
 	__u32 channel = info->line - card->first_line;
@@ -3097,8 +3095,7 @@ static int cy_init_card(struct cyclades_card *cinfo)
 			else
 				info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
 #ifdef CONFIG_CYZ_INTR
-			setup_timer(&cyz_rx_full_timer[port],
-				cyz_rx_restart, (unsigned long)info);
+			timer_setup(&info->rx_full_timer, cyz_rx_restart, 0);
 #endif
 		} else {
 			unsigned short chip_number;
diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c
index a1c7125cb968..47ac56817c43 100644
--- a/drivers/tty/ehv_bytechan.c
+++ b/drivers/tty/ehv_bytechan.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /* ePAPR hypervisor byte channel device driver
  *
  * Copyright 2009-2011 Freescale Semiconductor, Inc.
  *
  * Author: Timur Tabi <timur@freescale.com>
  *
- * This file is licensed under the terms of the GNU General Public License
- * version 2.  This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- *
  * This driver support three distinct interfaces, all of which are related to
  * ePAPR hypervisor byte channels.
  *
@@ -328,7 +325,7 @@ console_initcall(ehv_bc_console_init);
 /******************************** TTY DRIVER ********************************/
 
 /*
- * byte channel receive interupt handler
+ * byte channel receive interrupt handler
  *
  * This ISR is called whenever data is available on a byte channel.
  */
@@ -428,7 +425,7 @@ static void ehv_bc_tx_dequeue(struct ehv_bc_data *bc)
 }
 
 /*
- * byte channel transmit interupt handler
+ * byte channel transmit interrupt handler
  *
  * This ISR is called whenever space becomes available for transmitting
  * characters on a byte channel.
diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index 381e981dee06..7f657bb5113c 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2007 Google, Inc.
  * Copyright (C) 2012 Intel, Inc.
  * Copyright (C) 2017 Imagination Technologies Ltd.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 #include <linux/console.h>
diff --git a/drivers/tty/hvc/hvc_bfin_jtag.c b/drivers/tty/hvc/hvc_bfin_jtag.c
index 31d6cc6a77af..dd7cae4c195b 100644
--- a/drivers/tty/hvc/hvc_bfin_jtag.c
+++ b/drivers/tty/hvc/hvc_bfin_jtag.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Console via Blackfin JTAG Communication
  *
  * Copyright 2008-2011 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
  */
 
 #include <linux/console.h>
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index a8d399188242..7709fcc707f4 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
  * Copyright (C) 2001 Paul Mackerras <paulus@au.ibm.com>, IBM
@@ -6,20 +7,6 @@
  *
  * Additional Author(s):
  *  Ryan S. Arnold <rsa@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/console.h>
diff --git a/drivers/tty/hvc/hvc_console.h b/drivers/tty/hvc/hvc_console.h
index 798c48d0d32c..ea63090e013f 100644
--- a/drivers/tty/hvc/hvc_console.h
+++ b/drivers/tty/hvc/hvc_console.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * hvc_console.h
  * Copyright (C) 2005 IBM Corporation
@@ -8,20 +9,6 @@
  * hvc_console header information:
  *      moved here from arch/powerpc/include/asm/hvconsole.h
  *      and drivers/char/hvc_console.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #ifndef HVC_CONSOLE_H
diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c
index 82f240fb98f0..02629a1f193d 100644
--- a/drivers/tty/hvc/hvc_dcc.c
+++ b/drivers/tty/hvc/hvc_dcc.c
@@ -1,14 +1,5 @@
-/* Copyright (c) 2010, 2014 The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2010, 2014 The Linux Foundation. All rights reserved.  */
 
 #include <linux/init.h>
 
diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index 16331a90c1e8..2ed07ca6389e 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * opal driver interface to hvc_console.c
  *
  * Copyright 2011 Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- *
  */
 
 #undef DEBUG
diff --git a/drivers/tty/hvc/hvc_rtas.c b/drivers/tty/hvc/hvc_rtas.c
index 08c87920b74a..e8b8c645482b 100644
--- a/drivers/tty/hvc/hvc_rtas.c
+++ b/drivers/tty/hvc/hvc_rtas.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * IBM RTAS driver interface to hvc_console.c
  *
@@ -11,20 +12,6 @@
  *
  *    inspired by drivers/char/hvc_console.c
  *    written by Anton Blanchard and Paul Mackerras
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/console.h>
diff --git a/drivers/tty/hvc/hvc_tile.c b/drivers/tty/hvc/hvc_tile.c
index 9da1e842bbe9..b517c0661abb 100644
--- a/drivers/tty/hvc/hvc_tile.c
+++ b/drivers/tty/hvc/hvc_tile.c
@@ -1,16 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2010 Tilera Corporation. All Rights Reserved.
  *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- *
  * Tilera TILE Processor hypervisor console
  */
 
diff --git a/drivers/tty/hvc/hvc_udbg.c b/drivers/tty/hvc/hvc_udbg.c
index 9cf573d06a29..a4c9913f76a0 100644
--- a/drivers/tty/hvc/hvc_udbg.c
+++ b/drivers/tty/hvc/hvc_udbg.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * udbg interface to hvc_console.c
  *
  * (C) Copyright David Gibson, IBM Corporation 2008.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/console.h>
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index a1d272ac82bb..59eaa620bf13 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * vio driver interface to hvc_console.c
  *
@@ -14,20 +15,6 @@
  * Additional Author(s):
  *  Ryan S. Arnold <rsa@us.ibm.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- *
  * TODO:
  *
  *   - handle error in sending hvsi protocol packets
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 5e87e4866bcb..dc43fa96c3de 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * xen console driver interface to hvc_console.c
  *
  * (c) 2007 Gerd Hoffmann <kraxel@suse.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/console.h>
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index 63c29fe9d21f..1db1d97e72e7 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * IBM eServer Hypervisor Virtual Console Server Device Driver
  * Copyright (C) 2003, 2004 IBM Corp.
  *  Ryan S. Arnold (rsa@us.ibm.com)
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- *
  * Author(s) :  Ryan S. Arnold <rsa@us.ibm.com>
  *
  * This is the device driver for the IBM Hypervisor Virtual Console Server,
diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
index 2e578d6433af..66f95f758be0 100644
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2004 Hollis Blanchard <hollisb@us.ibm.com>, IBM
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 /* Host Virtual Serial Interface (HVSI) is a protocol between the hosted OS
diff --git a/drivers/tty/ipwireless/main.c b/drivers/tty/ipwireless/main.c
index 655c7948261c..3475e841ef5c 100644
--- a/drivers/tty/ipwireless/main.c
+++ b/drivers/tty/ipwireless/main.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IPWireless 3G PCMCIA Network Driver
  *
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index 40af32108ff5..ee7958ab269f 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -1,9 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License
- *	as published by the Free Software Foundation; either version
- *	2 of the License, or (at your option) any later version.
- *
  *	Original driver code supplied by Multi-Tech
  *
  *	Changes
diff --git a/drivers/tty/metag_da.c b/drivers/tty/metag_da.c
index 25ccef2fe748..99eaed4b2dbc 100644
--- a/drivers/tty/metag_da.c
+++ b/drivers/tty/metag_da.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  dashtty.c - tty driver for Dash channels interface.
  *
  *  Copyright (C) 2007,2008,2012 Imagination Technologies
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- *
  */
 
 #include <linux/atomic.h>
@@ -309,7 +305,7 @@ static int put_data(void *arg)
 /*
  *	This gets called every DA_TTY_POLL and polls the channels for data
  */
-static void dashtty_timer(unsigned long ignored)
+static void dashtty_timer(struct timer_list *poll_timer)
 {
 	int channel;
 
@@ -323,12 +319,12 @@ static void dashtty_timer(unsigned long ignored)
 	if (channel >= 0)
 		fetch_data(channel);
 
-	mod_timer(&poll_timer, jiffies + DA_TTY_POLL);
+	mod_timer(poll_timer, jiffies + DA_TTY_POLL);
 }
 
 static void add_poll_timer(struct timer_list *poll_timer)
 {
-	setup_pinned_timer(poll_timer, dashtty_timer, 0);
+	timer_setup(poll_timer, dashtty_timer, TIMER_PINNED);
 	poll_timer->expires = jiffies + DA_TTY_POLL;
 
 	/*
@@ -461,7 +457,7 @@ static void dashtty_hangup(struct tty_struct *tty)
  * buffers. It is used to delay the expensive writeout until the writer has
  * stopped writing.
  */
-static void dashtty_put_timer(unsigned long ignored)
+static void dashtty_put_timer(struct timer_list *unused)
 {
 	if (atomic_read(&dashtty_xmit_cnt))
 		wake_up_interruptible(&dashtty_waitqueue);
@@ -603,7 +599,7 @@ static int __init dashtty_init(void)
 		complete(&dport->xmit_empty);
 	}
 
-	setup_timer(&put_timer, dashtty_put_timer, 0);
+	timer_setup(&put_timer, dashtty_put_timer, 0);
 
 	init_waitqueue_head(&dashtty_waitqueue);
 	dashtty_thread = kthread_create(put_data, NULL, "ttyDA");
diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c
index a2dab3fb8751..4c1cd49ae95b 100644
--- a/drivers/tty/mips_ejtag_fdc.c
+++ b/drivers/tty/mips_ejtag_fdc.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TTY driver for MIPS EJTAG Fast Debug Channels.
  *
  * Copyright (C) 2007-2015 Imagination Technologies Ltd
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for more
- * details.
  */
 
 #include <linux/atomic.h>
@@ -683,9 +680,9 @@ static irqreturn_t mips_ejtag_fdc_isr(int irq, void *dev_id)
  * It simply triggers the common FDC handler code and arranges for further
  * polling.
  */
-static void mips_ejtag_fdc_tty_timer(unsigned long opaque)
+static void mips_ejtag_fdc_tty_timer(struct timer_list *t)
 {
-	struct mips_ejtag_fdc_tty *priv = (void *)opaque;
+	struct mips_ejtag_fdc_tty *priv = from_timer(priv, t, poll_timer);
 
 	mips_ejtag_fdc_handle(priv);
 	if (!priv->removing)
@@ -1002,8 +999,8 @@ static int mips_ejtag_fdc_tty_probe(struct mips_cdmm_device *dev)
 		raw_spin_unlock_irq(&priv->lock);
 	} else {
 		/* If we didn't get an usable IRQ, poll instead */
-		setup_pinned_timer(&priv->poll_timer, mips_ejtag_fdc_tty_timer,
-			    (unsigned long)priv);
+		timer_setup(&priv->poll_timer, mips_ejtag_fdc_tty_timer,
+			    TIMER_PINNED);
 		priv->poll_timer.expires = jiffies + FDC_TTY_POLL;
 		/*
 		 * Always attach the timer to the right CPU. The channels are
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 93d37655d928..65a70f3c7cde 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*****************************************************************************/
 /*
  *           moxa.c  -- MOXA Intellio family multiport serial driver.
@@ -7,11 +8,6 @@
  *
  *      This code is loosely based on the Linux serial driver, written by
  *      Linus Torvalds, Theodore T'so and others.
- *
- *      This program is free software; you can redistribute it and/or modify
- *      it under the terms of the GNU General Public License as published by
- *      the Free Software Foundation; either version 2 of the License, or
- *      (at your option) any later version.
  */
 
 /*
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 7dd38047ba23..8bc15cb67a58 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
  *
@@ -8,11 +9,6 @@
  *	Linux serial driver, written by Linus Torvalds, Theodore T'so and
  *	others.
  *
- *      This program is free software; you can redistribute it and/or modify
- *      it under the terms of the GNU General Public License as published by
- *      the Free Software Foundation; either version 2 of the License, or
- *      (at your option) any later version.
- *
  *	Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  *	<alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
  *	www.moxa.com.
@@ -642,8 +638,7 @@ static int mxser_set_baud(struct tty_struct *tty, long newspd)
  * This routine is called to set the UART divisor registers to match
  * the specified baud rate for a serial port.
  */
-static int mxser_change_speed(struct tty_struct *tty,
-					struct ktermios *old_termios)
+static int mxser_change_speed(struct tty_struct *tty)
 {
 	struct mxser_port *info = tty->driver_data;
 	unsigned cflag, cval, fcr;
@@ -945,7 +940,7 @@ static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
 	/*
 	 * and set the speed of the serial port
 	 */
-	mxser_change_speed(tty, NULL);
+	mxser_change_speed(tty);
 	spin_unlock_irqrestore(&info->slock, flags);
 
 	return 0;
@@ -1288,7 +1283,7 @@ static int mxser_set_serial_info(struct tty_struct *tty,
 	if (tty_port_initialized(port)) {
 		if (flags != (port->flags & ASYNC_SPD_MASK)) {
 			spin_lock_irqsave(&info->slock, sl_flags);
-			mxser_change_speed(tty, NULL);
+			mxser_change_speed(tty);
 			spin_unlock_irqrestore(&info->slock, sl_flags);
 		}
 	} else {
@@ -1946,7 +1941,7 @@ static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termi
 	unsigned long flags;
 
 	spin_lock_irqsave(&info->slock, flags);
-	mxser_change_speed(tty, old_termios);
+	mxser_change_speed(tty);
 	spin_unlock_irqrestore(&info->slock, flags);
 
 	if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
@@ -2375,8 +2370,7 @@ static void mxser_release_ISA_res(struct mxser_board *brd)
 	mxser_release_vector(brd);
 }
 
-static int mxser_initbrd(struct mxser_board *brd,
-		struct pci_dev *pdev)
+static int mxser_initbrd(struct mxser_board *brd)
 {
 	struct mxser_port *info;
 	unsigned int i;
@@ -2640,7 +2634,7 @@ static int mxser_probe(struct pci_dev *pdev,
 	}
 
 	/* mxser_initbrd will hook ISR. */
-	retval = mxser_initbrd(brd, pdev);
+	retval = mxser_initbrd(brd);
 	if (retval)
 		goto err_rel3;
 
@@ -2746,7 +2740,7 @@ static int __init mxser_module_init(void)
 				brd->info->name, ioaddr[b]);
 
 		/* mxser_initbrd will hook ISR. */
-		if (mxser_initbrd(brd, NULL) < 0) {
+		if (mxser_initbrd(brd) < 0) {
 			mxser_release_ISA_res(brd);
 			brd->info = NULL;
 			continue;
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 0a3c9665e015..3a39eb685c69 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * n_gsm.c GSM 0710 tty multiplexor
  * Copyright (c) 2009/10 Intel Corporation
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  *	* THIS IS A DEVELOPMENT SNAPSHOT IT IS NOT A FINAL RELEASE *
  *
  * TO DO:
@@ -1646,9 +1634,7 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
 	}
 
 	skb_queue_head_init(&dlci->skb_list);
-	init_timer(&dlci->t1);
-	dlci->t1.function = gsm_dlci_t1;
-	dlci->t1.data = (unsigned long)dlci;
+	setup_timer(&dlci->t1, gsm_dlci_t1, (unsigned long)dlci);
 	tty_port_init(&dlci->port);
 	dlci->port.ops = &gsm_port_ops;
 	dlci->gsm = gsm;
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 7b2a466616d6..eea7b6cb3cc4 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /* generic HDLC line discipline for Linux
  *
  * Written by Paul Fulghum paulkf@microgate.com
@@ -11,8 +12,6 @@
  *
  * Original release 01/11/99
  *
- * This code is released under the GNU General Public License (GPL)
- *
  * This module implements the tty line discipline N_HDLC for use with
  * tty device drivers that support bit-synchronous HDLC communications.
  *
diff --git a/drivers/tty/n_null.c b/drivers/tty/n_null.c
index d63261c36e42..96feabae4740 100644
--- a/drivers/tty/n_null.c
+++ b/drivers/tty/n_null.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/tty.h>
@@ -7,19 +8,6 @@
  *  n_null.c - Null line discipline used in the failure path
  *
  *  Copyright (C) Intel 2017
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 
 static int n_null_open(struct tty_struct *tty)
diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c
index 305b6490d405..9f246d4db3ca 100644
--- a/drivers/tty/n_r3964.c
+++ b/drivers/tty/n_r3964.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /* r3964 linediscipline for linux
  *
  * -----------------------------------------------------------
@@ -5,9 +6,6 @@
  * Philips Automation Projects
  * Kassel (Germany)
  * -----------------------------------------------------------
- * This software may be used and distributed according to the terms of
- * the GNU General Public License, incorporated herein by reference.
- *
  * Author:
  * L. Haag
  *
diff --git a/drivers/tty/n_tracerouter.c b/drivers/tty/n_tracerouter.c
index ac5716979bc1..4479af4d2fa5 100644
--- a/drivers/tty/n_tracerouter.c
+++ b/drivers/tty/n_tracerouter.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  n_tracerouter.c - Trace data router through tty space
  *
@@ -5,17 +6,6 @@
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
  * This trace router uses the Linux line discipline framework to route
  * trace data coming from a HW Modem to a PTI (Parallel Trace Module) port.
  * The solution is not specific to a HW modem and this line disciple can
diff --git a/drivers/tty/n_tracesink.c b/drivers/tty/n_tracesink.c
index 4616870a6b1b..d96ba82cc356 100644
--- a/drivers/tty/n_tracesink.c
+++ b/drivers/tty/n_tracesink.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  n_tracesink.c - Trace data router and sink path through tty space.
  *
@@ -5,17 +6,6 @@
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
  * The trace sink uses the Linux line discipline framework to receive
  * trace data coming from the PTI source line discipline driver
  * to a user-desired tty port, like USB.
diff --git a/drivers/tty/n_tracesink.h b/drivers/tty/n_tracesink.h
index a68bb44f1ef5..1b846330c855 100644
--- a/drivers/tty/n_tracesink.h
+++ b/drivers/tty/n_tracesink.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  n_tracesink.h - Kernel driver API to route trace data in kernel space.
  *
@@ -5,17 +6,6 @@
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
  * The PTI (Parallel Trace Interface) driver directs trace data routed from
  * various parts in the system out through the Intel Penwell PTI port and
  * out of the mobile device for analysis with a debugging tool
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index bdf0e6e89991..427e0d5d8f13 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  * n_tty.c --- implements the N_TTY line discipline.
  *
@@ -15,9 +16,6 @@
  * This file also contains code originally written by Linus Torvalds,
  * Copyright 1991, 1992, 1993, and by Julian Cowley, Copyright 1994.
  *
- * This file may be redistributed under the terms of the GNU General Public
- * License.
- *
  * Reduced memory usage for older ARM systems  - Russell King.
  *
  * 2000/01/20   Fixed SMP locking on put_tty_queue using bits of
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index 39b3723a32a6..b57b35066ebe 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
 /*
  * nozomi.c  -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
  *
@@ -21,20 +22,6 @@
  * Copyright (c) 2006 Option Wireless n/v
  * All rights Reserved.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
  * --------------------------------------------------------------------------
  */
 
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index aa695fda1084..f7dc9b1ea806 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
 /*
  * RocketPort device driver for Linux
  *
  * Written by Theodore Ts'o, 1995, 1996, 1997, 1998, 1999, 2000.
  * 
  * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003 by Comtrol, Inc.
- * 
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*
diff --git a/drivers/tty/serdev/Kconfig b/drivers/tty/serdev/Kconfig
index cdc6b820cf93..1dbc8352e027 100644
--- a/drivers/tty/serdev/Kconfig
+++ b/drivers/tty/serdev/Kconfig
@@ -6,11 +6,19 @@ menuconfig SERIAL_DEV_BUS
 	help
 	  Core support for devices connected via a serial port.
 
+	  Note that you typically also want to enable TTY port controller support.
+
 if SERIAL_DEV_BUS
 
 config SERIAL_DEV_CTRL_TTYPORT
 	bool "Serial device TTY port controller"
+	help
+	  Say Y here if you want to use the Serial device bus with common TTY
+	  drivers (e.g. serial drivers).
+
+	  If unsure, say Y.
 	depends on TTY
 	depends on SERIAL_DEV_BUS != m
+	default y
 
 endif
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index c68fb3a8ea1c..1bef39828ca7 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -1,19 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2016-2017 Linaro Ltd., Rob Herring <robh@kernel.org>
  *
  * Based on drivers/spmi/spmi.c:
  * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
+#include <linux/acpi.h>
 #include <linux/errno.h>
 #include <linux/idr.h>
 #include <linux/kernel.h>
@@ -49,13 +42,22 @@ static const struct device_type serdev_ctrl_type = {
 
 static int serdev_device_match(struct device *dev, struct device_driver *drv)
 {
-	/* TODO: ACPI and platform matching */
+	/* TODO: platform matching */
+	if (acpi_driver_match_device(dev, drv))
+		return 1;
+
 	return of_driver_match_device(dev, drv);
 }
 
 static int serdev_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
-	/* TODO: ACPI and platform modalias */
+	int rc;
+
+	/* TODO: platform modalias */
+	rc = acpi_device_uevent_modalias(dev, env);
+	if (rc != -ENODEV)
+		return rc;
+
 	return of_device_uevent_modalias(dev, env);
 }
 
@@ -65,21 +67,32 @@ static int serdev_uevent(struct device *dev, struct kobj_uevent_env *env)
  */
 int serdev_device_add(struct serdev_device *serdev)
 {
+	struct serdev_controller *ctrl = serdev->ctrl;
 	struct device *parent = serdev->dev.parent;
 	int err;
 
 	dev_set_name(&serdev->dev, "%s-%d", dev_name(parent), serdev->nr);
 
+	/* Only a single slave device is currently supported. */
+	if (ctrl->serdev) {
+		dev_err(&serdev->dev, "controller busy\n");
+		return -EBUSY;
+	}
+	ctrl->serdev = serdev;
+
 	err = device_add(&serdev->dev);
 	if (err < 0) {
 		dev_err(&serdev->dev, "Can't add %s, status %d\n",
 			dev_name(&serdev->dev), err);
-		goto err_device_add;
+		goto err_clear_serdev;
 	}
 
 	dev_dbg(&serdev->dev, "device %s registered\n", dev_name(&serdev->dev));
 
-err_device_add:
+	return 0;
+
+err_clear_serdev:
+	ctrl->serdev = NULL;
 	return err;
 }
 EXPORT_SYMBOL_GPL(serdev_device_add);
@@ -90,7 +103,10 @@ EXPORT_SYMBOL_GPL(serdev_device_add);
  */
 void serdev_device_remove(struct serdev_device *serdev)
 {
+	struct serdev_controller *ctrl = serdev->ctrl;
+
 	device_unregister(&serdev->dev);
+	ctrl->serdev = NULL;
 }
 EXPORT_SYMBOL_GPL(serdev_device_remove);
 
@@ -260,6 +276,12 @@ static int serdev_drv_remove(struct device *dev)
 static ssize_t modalias_show(struct device *dev,
 			     struct device_attribute *attr, char *buf)
 {
+	int len;
+
+	len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1);
+	if (len != -ENODEV)
+		return len;
+
 	return of_device_modalias(dev, buf, PAGE_SIZE);
 }
 DEVICE_ATTR_RO(modalias);
@@ -295,7 +317,6 @@ struct serdev_device *serdev_device_alloc(struct serdev_controller *ctrl)
 		return NULL;
 
 	serdev->ctrl = ctrl;
-	ctrl->serdev = serdev;
 	device_initialize(&serdev->dev);
 	serdev->dev.parent = &ctrl->dev;
 	serdev->dev.bus = &serdev_bus_type;
@@ -329,26 +350,31 @@ struct serdev_controller *serdev_controller_alloc(struct device *parent,
 	if (!ctrl)
 		return NULL;
 
-	device_initialize(&ctrl->dev);
-	ctrl->dev.type = &serdev_ctrl_type;
-	ctrl->dev.bus = &serdev_bus_type;
-	ctrl->dev.parent = parent;
-	ctrl->dev.of_node = parent->of_node;
-	serdev_controller_set_drvdata(ctrl, &ctrl[1]);
-
 	id = ida_simple_get(&ctrl_ida, 0, 0, GFP_KERNEL);
 	if (id < 0) {
 		dev_err(parent,
 			"unable to allocate serdev controller identifier.\n");
-		serdev_controller_put(ctrl);
-		return NULL;
+		goto err_free;
 	}
 
 	ctrl->nr = id;
+
+	device_initialize(&ctrl->dev);
+	ctrl->dev.type = &serdev_ctrl_type;
+	ctrl->dev.bus = &serdev_bus_type;
+	ctrl->dev.parent = parent;
+	ctrl->dev.of_node = parent->of_node;
+	serdev_controller_set_drvdata(ctrl, &ctrl[1]);
+
 	dev_set_name(&ctrl->dev, "serial%d", id);
 
 	dev_dbg(&ctrl->dev, "allocated controller 0x%p id %d\n", ctrl, id);
 	return ctrl;
+
+err_free:
+	kfree(ctrl);
+
+	return NULL;
 }
 EXPORT_SYMBOL_GPL(serdev_controller_alloc);
 
@@ -385,6 +411,75 @@ static int of_serdev_register_devices(struct serdev_controller *ctrl)
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+static acpi_status acpi_serdev_register_device(struct serdev_controller *ctrl,
+					    struct acpi_device *adev)
+{
+	struct serdev_device *serdev = NULL;
+	int err;
+
+	if (acpi_bus_get_status(adev) || !adev->status.present ||
+	    acpi_device_enumerated(adev))
+		return AE_OK;
+
+	serdev = serdev_device_alloc(ctrl);
+	if (!serdev) {
+		dev_err(&ctrl->dev, "failed to allocate serdev device for %s\n",
+			dev_name(&adev->dev));
+		return AE_NO_MEMORY;
+	}
+
+	ACPI_COMPANION_SET(&serdev->dev, adev);
+	acpi_device_set_enumerated(adev);
+
+	err = serdev_device_add(serdev);
+	if (err) {
+		dev_err(&serdev->dev,
+			"failure adding ACPI serdev device. status %d\n", err);
+		serdev_device_put(serdev);
+	}
+
+	return AE_OK;
+}
+
+static acpi_status acpi_serdev_add_device(acpi_handle handle, u32 level,
+				       void *data, void **return_value)
+{
+	struct serdev_controller *ctrl = data;
+	struct acpi_device *adev;
+
+	if (acpi_bus_get_device(handle, &adev))
+		return AE_OK;
+
+	return acpi_serdev_register_device(ctrl, adev);
+}
+
+static int acpi_serdev_register_devices(struct serdev_controller *ctrl)
+{
+	acpi_status status;
+	acpi_handle handle;
+
+	handle = ACPI_HANDLE(ctrl->dev.parent);
+	if (!handle)
+		return -ENODEV;
+
+	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
+				     acpi_serdev_add_device, NULL, ctrl, NULL);
+	if (ACPI_FAILURE(status))
+		dev_dbg(&ctrl->dev, "failed to enumerate serdev slaves\n");
+
+	if (!ctrl->serdev)
+		return -ENODEV;
+
+	return 0;
+}
+#else
+static inline int acpi_serdev_register_devices(struct serdev_controller *ctrl)
+{
+	return -ENODEV;
+}
+#endif /* CONFIG_ACPI */
+
 /**
  * serdev_controller_add() - Add an serdev controller
  * @ctrl:	controller to be registered.
@@ -394,7 +489,7 @@ static int of_serdev_register_devices(struct serdev_controller *ctrl)
  */
 int serdev_controller_add(struct serdev_controller *ctrl)
 {
-	int ret;
+	int ret_of, ret_acpi, ret;
 
 	/* Can't register until after driver model init */
 	if (WARN_ON(!is_registered))
@@ -404,9 +499,14 @@ int serdev_controller_add(struct serdev_controller *ctrl)
 	if (ret)
 		return ret;
 
-	ret = of_serdev_register_devices(ctrl);
-	if (ret)
+	ret_of = of_serdev_register_devices(ctrl);
+	ret_acpi = acpi_serdev_register_devices(ctrl);
+	if (ret_of && ret_acpi) {
+		dev_dbg(&ctrl->dev, "no devices registered: of:%d acpi:%d\n",
+			ret_of, ret_acpi);
+		ret = -ENODEV;
 		goto out_dev_del;
+	}
 
 	dev_dbg(&ctrl->dev, "serdev%d registered: dev:%p\n",
 		ctrl->nr, &ctrl->dev);
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index 302018d67efa..ce7ad0acee7a 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -1,14 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2016-2017 Linaro Ltd., Rob Herring <robh@kernel.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 #include <linux/kernel.h>
 #include <linux/serdev.h>
@@ -96,16 +88,21 @@ static int ttyport_open(struct serdev_controller *ctrl)
 	struct serport *serport = serdev_controller_get_drvdata(ctrl);
 	struct tty_struct *tty;
 	struct ktermios ktermios;
+	int ret;
 
 	tty = tty_init_dev(serport->tty_drv, serport->tty_idx);
 	if (IS_ERR(tty))
 		return PTR_ERR(tty);
 	serport->tty = tty;
 
-	if (tty->ops->open)
-		tty->ops->open(serport->tty, NULL);
-	else
-		tty_port_open(serport->port, tty, NULL);
+	if (!tty->ops->open || !tty->ops->close) {
+		ret = -ENODEV;
+		goto err_unlock;
+	}
+
+	ret = tty->ops->open(serport->tty, NULL);
+	if (ret)
+		goto err_close;
 
 	/* Bring the UART into a known 8 bits no parity hw fc state */
 	ktermios = tty->termios;
@@ -122,6 +119,14 @@ static int ttyport_open(struct serdev_controller *ctrl)
 
 	tty_unlock(serport->tty);
 	return 0;
+
+err_close:
+	tty->ops->close(tty, NULL);
+err_unlock:
+	tty_unlock(tty);
+	tty_release_struct(tty, serport->tty_idx);
+
+	return ret;
 }
 
 static void ttyport_close(struct serdev_controller *ctrl)
diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c
index 804632b4a929..32b3acf8150a 100644
--- a/drivers/tty/serial/21285.c
+++ b/drivers/tty/serial/21285.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for the serial port on the 21285 StrongArm-110 core logic chip.
  *
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index b2bdc35f7495..ebfb0bd5bef5 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for 8250/16550-type serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  *
  *  Copyright (C) 2001 Russell King.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/serial_8250.h>
diff --git a/drivers/tty/serial/8250/8250_accent.c b/drivers/tty/serial/8250/8250_accent.c
index 522aeae05192..1691f1a57f89 100644
--- a/drivers/tty/serial/8250/8250_accent.c
+++ b/drivers/tty/serial/8250/8250_accent.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/tty/serial/8250/8250_acorn.c b/drivers/tty/serial/8250/8250_acorn.c
index 402dfdd4940e..758c4aa203ab 100644
--- a/drivers/tty/serial/8250/8250_acorn.c
+++ b/drivers/tty/serial/8250/8250_acorn.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  linux/drivers/serial/acorn.c
  *
  *  Copyright (C) 1996-2003 Russell King.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/types.h>
diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c
index 33a801353114..74a408d9db24 100644
--- a/drivers/tty/serial/8250/8250_aspeed_vuart.c
+++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Serial Port driver for Aspeed VUART device
  *
  *    Copyright (C) 2016 Jeremy Kerr <jk@ozlabs.org>, IBM Corp.
  *    Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp.
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
  */
 #include <linux/device.h>
 #include <linux/module.h>
diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index a23c7da42ea8..bd53661103eb 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Serial port driver for BCM2835AUX UART
  *
@@ -5,11 +6,6 @@
  *
  * Based on 8250_lpc18xx.c:
  * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  */
 
 #include <linux/clk.h>
diff --git a/drivers/tty/serial/8250/8250_boca.c b/drivers/tty/serial/8250/8250_boca.c
index a63b5998e383..a9b97c034653 100644
--- a/drivers/tty/serial/8250/8250_boca.c
+++ b/drivers/tty/serial/8250/8250_boca.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index d29b512a7d9f..d64afdd93872 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Universal/legacy driver for 8250/16550-type serial ports
  *
@@ -11,11 +12,6 @@
  *	      userspace-configurable "phantom" ports
  *	      "serial8250" platform devices
  *	      serial8250_register_8250_port() ports
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/module.h>
@@ -262,17 +258,17 @@ static void serial_unlink_irq_chain(struct uart_8250_port *up)
  * barely passable results for a 16550A.  (Although at the expense
  * of much CPU overhead).
  */
-static void serial8250_timeout(unsigned long data)
+static void serial8250_timeout(struct timer_list *t)
 {
-	struct uart_8250_port *up = (struct uart_8250_port *)data;
+	struct uart_8250_port *up = from_timer(up, t, timer);
 
 	up->port.handle_irq(&up->port);
 	mod_timer(&up->timer, jiffies + uart_poll_timeout(&up->port));
 }
 
-static void serial8250_backup_timeout(unsigned long data)
+static void serial8250_backup_timeout(struct timer_list *t)
 {
-	struct uart_8250_port *up = (struct uart_8250_port *)data;
+	struct uart_8250_port *up = from_timer(up, t, timer);
 	unsigned int iir, ier = 0, lsr;
 	unsigned long flags;
 
@@ -329,8 +325,7 @@ static int univ8250_setup_irq(struct uart_8250_port *up)
 	if (up->bugs & UART_BUG_THRE) {
 		pr_debug("ttyS%d - using backup timer\n", serial_index(port));
 
-		up->timer.function = serial8250_backup_timeout;
-		up->timer.data = (unsigned long)up;
+		up->timer.function = (TIMER_FUNC_TYPE)serial8250_backup_timeout;
 		mod_timer(&up->timer, jiffies +
 			  uart_poll_timeout(port) + HZ / 5);
 	}
@@ -341,7 +336,6 @@ static int univ8250_setup_irq(struct uart_8250_port *up)
 	 * driver used to do this with IRQ0.
 	 */
 	if (!port->irq) {
-		up->timer.data = (unsigned long)up;
 		mod_timer(&up->timer, jiffies + uart_poll_timeout(port));
 	} else
 		retval = serial_link_irq_chain(up);
@@ -354,7 +348,7 @@ static void univ8250_release_irq(struct uart_8250_port *up)
 	struct uart_port *port = &up->port;
 
 	del_timer_sync(&up->timer);
-	up->timer.function = serial8250_timeout;
+	up->timer.function = (TIMER_FUNC_TYPE)serial8250_timeout;
 	if (port->irq)
 		serial_unlink_irq_chain(up);
 }
@@ -525,8 +519,7 @@ static void __init serial8250_isa_init_ports(void)
 			base_ops = port->ops;
 		port->ops = &univ8250_port_ops;
 
-		init_timer(&up->timer);
-		up->timer.function = serial8250_timeout;
+		timer_setup(&up->timer, serial8250_timeout, 0);
 
 		up->ops = &univ8250_driver_ops;
 
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index 26f17456b0d7..bfa1a857f3ff 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * 8250_dma.c - DMA Engine API support for 8250.c
  *
  * Copyright (C) 2013 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 7e638997bfc2..5bb0c42c88dd 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Synopsys DesignWare 8250 driver.
  *
  * Copyright 2011 Picochip, Jamie Iles.
  * Copyright 2013 Intel Corporation
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  * The Synopsys DesignWare 8250 has an extra feature whereby it detects if the
  * LCR is written whilst busy.  If it is, then a busy detect interrupt is
  * raised, the LCR needs to be rewritten and the uart status register read.
@@ -256,25 +252,31 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios,
 			       struct ktermios *old)
 {
 	unsigned int baud = tty_termios_baud_rate(termios);
+	unsigned int target_rate, min_rate, max_rate;
 	struct dw8250_data *d = p->private_data;
 	long rate;
-	int ret;
+	int i, ret;
 
 	if (IS_ERR(d->clk) || !old)
 		goto out;
 
-	clk_disable_unprepare(d->clk);
-	rate = clk_round_rate(d->clk, baud * 16);
-	if (rate < 0)
-		ret = rate;
-	else if (rate == 0)
-		ret = -ENOENT;
-	else
-		ret = clk_set_rate(d->clk, rate);
-	clk_prepare_enable(d->clk);
+	/* Find a clk rate within +/-1.6% of an integer multiple of baudx16 */
+	target_rate = baud * 16;
+	min_rate = target_rate - (target_rate >> 6);
+	max_rate = target_rate + (target_rate >> 6);
 
-	if (!ret)
-		p->uartclk = rate;
+	for (i = 1; i <= UART_DIV_MAX; i++) {
+		rate = clk_round_rate(d->clk, i * target_rate);
+		if (rate >= i * min_rate && rate <= i * max_rate)
+			break;
+	}
+	if (i <= UART_DIV_MAX) {
+		clk_disable_unprepare(d->clk);
+		ret = clk_set_rate(d->clk, rate);
+		clk_prepare_enable(d->clk);
+		if (!ret)
+			p->uartclk = rate;
+	}
 
 out:
 	p->status &= ~UPSTAT_AUTOCTS;
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index af72ec32e404..362c25ff188a 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Early serial console for 8250/16550 devices
  *
  * (c) Copyright 2004 Hewlett-Packard Development Company, L.P.
  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Based on the 8250.c serial driver, Copyright (C) 2001 Russell King,
  * and on early_printk.c by Andi Kleen.
  *
diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c
index 0b6381214917..f6a86f2bc4e5 100644
--- a/drivers/tty/serial/8250/8250_em.c
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Renesas Emma Mobile 8250 driver
  *
  *  Copyright (C) 2012 Magnus Damm
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/device.h>
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index c55624703fdf..a402878c9f30 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Probe module for 8250/16550-type Exar chips PCI serial ports.
  *
  *  Based on drivers/tty/serial/8250/8250_pci.c,
  *
  *  Copyright (C) 2017 Sudip Mukherjee, All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
  */
 #include <linux/acpi.h>
 #include <linux/dmi.h>
diff --git a/drivers/tty/serial/8250/8250_exar_st16c554.c b/drivers/tty/serial/8250/8250_exar_st16c554.c
index 3a7cb8262bb9..933811ebfaac 100644
--- a/drivers/tty/serial/8250/8250_exar_st16c554.c
+++ b/drivers/tty/serial/8250/8250_exar_st16c554.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Written by Paul B Schroeder < pschroeder "at" uplogix "dot" com >
  *  Based on 8250_boca.
  *
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c
index e500f7dd2470..79a4958b3f5c 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Probe for F81216A LPC to 4 UART
  *
  *  Copyright (C) 2014-2016 Ricardo Ribalda, Qtechnology A/S
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
  */
 #include <linux/module.h>
 #include <linux/pci.h>
@@ -40,6 +36,16 @@
 #define IRQ_LEVEL_LOW	0
 #define IRQ_EDGE_HIGH	BIT(5)
 
+/*
+ * F81216H clock source register, the value and mask is the same with F81866,
+ * but it's on F0h.
+ *
+ * Clock speeds for UART (register F0h)
+ * 00: 1.8432MHz.
+ * 01: 18.432MHz.
+ * 10: 24MHz.
+ * 11: 14.769MHz.
+ */
 #define RS485  0xF0
 #define RTS_INVERT BIT(5)
 #define RS485_URA BIT(4)
@@ -118,6 +124,9 @@ static int fintek_8250_enter_key(u16 base_port, u8 key)
 	if (!request_muxed_region(base_port, 2, "8250_fintek"))
 		return -EBUSY;
 
+	/* Force to deactive all SuperIO in this base_port */
+	outb(EXIT_KEY, base_port + ADDR_PORT);
+
 	outb(key, base_port + ADDR_PORT);
 	outb(key, base_port + ADDR_PORT);
 	return 0;
@@ -188,14 +197,27 @@ static int fintek_8250_rs485_config(struct uart_port *port,
 	if (!pdata)
 		return -EINVAL;
 
-	if (rs485->flags & SER_RS485_ENABLED)
+	/* Hardware do not support same RTS level on send and receive */
+	if (!(rs485->flags & SER_RS485_RTS_ON_SEND) ==
+			!(rs485->flags & SER_RS485_RTS_AFTER_SEND))
+		return -EINVAL;
+
+	if (rs485->flags & SER_RS485_ENABLED) {
 		memset(rs485->padding, 0, sizeof(rs485->padding));
-	else
+		config |= RS485_URA;
+	} else {
 		memset(rs485, 0, sizeof(*rs485));
+	}
 
 	rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND |
 			SER_RS485_RTS_AFTER_SEND;
 
+	/* Only the first port supports delays */
+	if (pdata->index) {
+		rs485->delay_rts_before_send = 0;
+		rs485->delay_rts_after_send = 0;
+	}
+
 	if (rs485->delay_rts_before_send) {
 		rs485->delay_rts_before_send = 1;
 		config |= TXW4C_IRA;
@@ -206,12 +228,6 @@ static int fintek_8250_rs485_config(struct uart_port *port,
 		config |= RXW4C_IRA;
 	}
 
-	if ((!!(rs485->flags & SER_RS485_RTS_ON_SEND)) ==
-			(!!(rs485->flags & SER_RS485_RTS_AFTER_SEND)))
-		rs485->flags &= SER_RS485_ENABLED;
-	else
-		config |= RS485_URA;
-
 	if (rs485->flags & SER_RS485_RTS_ON_SEND)
 		config |= RTS_INVERT;
 
@@ -280,13 +296,91 @@ static void fintek_8250_goto_highspeed(struct uart_8250_port *uart,
 			F81866_UART_CLK_MASK,
 			F81866_UART_CLK_14_769MHZ);
 
-			uart->port.uartclk = 921600 * 16;
+		uart->port.uartclk = 921600 * 16;
 		break;
 	default: /* leave clock speed untouched */
 		break;
 	}
 }
 
+void fintek_8250_set_termios(struct uart_port *port, struct ktermios *termios,
+			struct ktermios *old)
+{
+	struct fintek_8250 *pdata = port->private_data;
+	unsigned int baud = tty_termios_baud_rate(termios);
+	int i;
+	u8 reg;
+	static u32 baudrate_table[] = {115200, 921600, 1152000, 1500000};
+	static u8 clock_table[] = { F81866_UART_CLK_1_8432MHZ,
+			F81866_UART_CLK_14_769MHZ, F81866_UART_CLK_18_432MHZ,
+			F81866_UART_CLK_24MHZ };
+
+	/*
+	 * We'll use serial8250_do_set_termios() for baud = 0, otherwise It'll
+	 * crash on baudrate_table[i] % baud with "division by zero".
+	 */
+	if (!baud)
+		goto exit;
+
+	switch (pdata->pid) {
+	case CHIP_ID_F81216H:
+		reg = RS485;
+		break;
+	case CHIP_ID_F81866:
+		reg = F81866_UART_CLK;
+		break;
+	default:
+		/* Don't change clocksource with unknown PID */
+		dev_warn(port->dev,
+			"%s: pid: %x Not support. use default set_termios.\n",
+			__func__, pdata->pid);
+		goto exit;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(baudrate_table); ++i) {
+		if (baud > baudrate_table[i] || baudrate_table[i] % baud != 0)
+			continue;
+
+		if (port->uartclk == baudrate_table[i] * 16)
+			break;
+
+		if (fintek_8250_enter_key(pdata->base_port, pdata->key))
+			continue;
+
+		port->uartclk = baudrate_table[i] * 16;
+
+		sio_write_reg(pdata, LDN, pdata->index);
+		sio_write_mask_reg(pdata, reg, F81866_UART_CLK_MASK,
+				clock_table[i]);
+
+		fintek_8250_exit_key(pdata->base_port);
+		break;
+	}
+
+	if (i == ARRAY_SIZE(baudrate_table)) {
+		baud = tty_termios_baud_rate(old);
+		tty_termios_encode_baud_rate(termios, baud, baud);
+	}
+
+exit:
+	serial8250_do_set_termios(port, termios, old);
+}
+
+static void fintek_8250_set_termios_handler(struct uart_8250_port *uart)
+{
+	struct fintek_8250 *pdata = uart->port.private_data;
+
+	switch (pdata->pid) {
+	case CHIP_ID_F81216H:
+	case CHIP_ID_F81866:
+		uart->port.set_termios = fintek_8250_set_termios;
+		break;
+
+	default:
+		break;
+	}
+}
+
 static int probe_setup_port(struct fintek_8250 *pdata,
 					struct uart_8250_port *uart)
 {
@@ -373,6 +467,7 @@ int fintek_8250_probe(struct uart_8250_port *uart)
 	memcpy(pdata, &probe_data, sizeof(probe_data));
 	uart->port.private_data = pdata;
 	fintek_8250_set_rs485_handler(uart);
+	fintek_8250_set_termios_handler(uart);
 
 	return 0;
 }
diff --git a/drivers/tty/serial/8250/8250_fourport.c b/drivers/tty/serial/8250/8250_fourport.c
index 4045180a8cfc..3215b9b7afde 100644
--- a/drivers/tty/serial/8250/8250_fourport.c
+++ b/drivers/tty/serial/8250/8250_fourport.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c
index 910bfee5a88b..6640a4c7ddd1 100644
--- a/drivers/tty/serial/8250/8250_fsl.c
+++ b/drivers/tty/serial/8250/8250_fsl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/serial_reg.h>
 #include <linux/serial_8250.h>
 
@@ -6,10 +7,6 @@
 /*
  * Freescale 16550 UART "driver", Copyright (C) 2011 Paul Gortmaker.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * This isn't a full driver; it just provides an alternate IRQ
  * handler to deal with an errata.  Everything else is just
  * using the bog standard 8250 support.
diff --git a/drivers/tty/serial/8250/8250_gsc.c b/drivers/tty/serial/8250/8250_gsc.c
index df2931e1e086..0809ae2aa9b1 100644
--- a/drivers/tty/serial/8250/8250_gsc.c
+++ b/drivers/tty/serial/8250/8250_gsc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *	Serial Device Initialisation for Lasi/Asp/Wax/Dino
  *
  *	(c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002
- *
- *	This program is free software; you can redistribute it and/or modify
- *	it under the terms of the GNU General Public License as published by
- *      the Free Software Foundation; either version 2 of the License, or
- *      (at your option) any later version.
  */
 
 #include <linux/errno.h>
diff --git a/drivers/tty/serial/8250/8250_hp300.c b/drivers/tty/serial/8250/8250_hp300.c
index 115190b7962a..3012ea03d22c 100644
--- a/drivers/tty/serial/8250/8250_hp300.c
+++ b/drivers/tty/serial/8250/8250_hp300.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for the 98626/98644/internal serial interface on hp300/hp400
  * (based on the National Semiconductor INS8250/NS16550AF/WD16C552 UARTs)
diff --git a/drivers/tty/serial/8250/8250_hub6.c b/drivers/tty/serial/8250/8250_hub6.c
index 27124e21eb96..273f59b9bca5 100644
--- a/drivers/tty/serial/8250/8250_hub6.c
+++ b/drivers/tty/serial/8250/8250_hub6.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c
index 464389b28900..6af84900870e 100644
--- a/drivers/tty/serial/8250/8250_ingenic.c
+++ b/drivers/tty/serial/8250/8250_ingenic.c
@@ -1,17 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2010 Lars-Peter Clausen <lars@metafoo.de>
  * Copyright (C) 2015 Imagination Technologies
  *
  * Ingenic SoC UART support
- *
- * This program is free software; you can redistribute	 it and/or modify it
- * under  the terms of	 the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the	License, or (at your
- * option) any later version.
- *
- * You should have received a copy of the  GNU General Public License along
- * with this program; if not, write  to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/tty/serial/8250/8250_lpc18xx.c b/drivers/tty/serial/8250/8250_lpc18xx.c
index 99cd478851ff..eddf119374e1 100644
--- a/drivers/tty/serial/8250/8250_lpc18xx.c
+++ b/drivers/tty/serial/8250/8250_lpc18xx.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Serial port driver for NXP LPC18xx/43xx UART
  *
@@ -6,11 +7,6 @@
  * Based on 8250_mtk.c:
  * Copyright (c) 2014 MundoReader S.L.
  * Matthias Brugger <matthias.bgg@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  */
 
 #include <linux/clk.h>
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index 7dddd7e6a01c..98dbc796353f 100644
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * 8250_lpss.c - Driver for UART on Intel Braswell and various other Intel SoCs
  *
  * Copyright (C) 2016 Intel Corporation
  * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/bitops.h>
diff --git a/drivers/tty/serial/8250/8250_mid.c b/drivers/tty/serial/8250/8250_mid.c
index ec957cce8c9a..efa0515139f8 100644
--- a/drivers/tty/serial/8250/8250_mid.c
+++ b/drivers/tty/serial/8250/8250_mid.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * 8250_mid.c - Driver for UART on Intel Penwell and various other Intel SOCs
  *
  * Copyright (C) 2015 Intel Corporation
  * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/bitops.h>
@@ -23,10 +20,11 @@
 #define PCI_DEVICE_ID_INTEL_PNW_UART2	0x081c
 #define PCI_DEVICE_ID_INTEL_PNW_UART3	0x081d
 #define PCI_DEVICE_ID_INTEL_TNG_UART	0x1191
+#define PCI_DEVICE_ID_INTEL_CDF_UART	0x18d8
 #define PCI_DEVICE_ID_INTEL_DNV_UART	0x19d8
 
 /* Intel MID Specific registers */
-#define INTEL_MID_UART_DNV_FISR		0x08
+#define INTEL_MID_UART_FISR		0x08
 #define INTEL_MID_UART_PS		0x30
 #define INTEL_MID_UART_MUL		0x34
 #define INTEL_MID_UART_DIV		0x38
@@ -130,7 +128,7 @@ static int dnv_handle_irq(struct uart_port *p)
 {
 	struct mid8250 *mid = p->private_data;
 	struct uart_8250_port *up = up_to_u8250p(p);
-	unsigned int fisr = serial_port_in(p, INTEL_MID_UART_DNV_FISR);
+	unsigned int fisr = serial_port_in(p, INTEL_MID_UART_FISR);
 	u32 status;
 	int ret = 0;
 	int err;
@@ -377,6 +375,7 @@ static const struct pci_device_id pci_ids[] = {
 	MID_DEVICE(PCI_DEVICE_ID_INTEL_PNW_UART2, pnw_board),
 	MID_DEVICE(PCI_DEVICE_ID_INTEL_PNW_UART3, pnw_board),
 	MID_DEVICE(PCI_DEVICE_ID_INTEL_TNG_UART, tng_board),
+	MID_DEVICE(PCI_DEVICE_ID_INTEL_CDF_UART, dnv_board),
 	MID_DEVICE(PCI_DEVICE_ID_INTEL_DNV_UART, dnv_board),
 	{ },
 };
diff --git a/drivers/tty/serial/8250/8250_moxa.c b/drivers/tty/serial/8250/8250_moxa.c
index d5069b2d4d79..1ee4cd94d4fa 100644
--- a/drivers/tty/serial/8250/8250_moxa.c
+++ b/drivers/tty/serial/8250/8250_moxa.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * 8250_moxa.c - MOXA Smartio/Industio MUE multiport serial driver.
  *
  * Author: Mathieu OTHACEHE <m.othacehe@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c
index fb45770d47aa..dd5e1cede2b5 100644
--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Mediatek 8250 driver.
  *
  * Copyright (c) 2014 MundoReader S.L.
  * Author: Matthias Brugger <matthias.bgg@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 #include <linux/clk.h>
 #include <linux/io.h>
@@ -61,7 +52,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
 	 * registers to their default values.
 	 */
 	baud = uart_get_baud_rate(port, termios, old,
-				  port->uartclk / 16 / 0xffff,
+				  port->uartclk / 16 / UART_DIV_MAX,
 				  port->uartclk);
 
 	if (baud <= 115200) {
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index 1222c005fb98..1e67a7e4a5fd 100644
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Serial Port driver for Open Firmware platform devices
  *
  *    Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp.
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- *
  */
 #include <linux/console.h>
 #include <linux/module.h>
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 833771bca0a5..bd40ba402410 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * 8250-core based driver for the OMAP internal UART
  *
@@ -199,7 +200,7 @@ static void omap_8250_get_divisor(struct uart_port *port, unsigned int baud,
 	 * Old custom speed handling.
 	 */
 	if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) {
-		priv->quot = port->custom_divisor & 0xffff;
+		priv->quot = port->custom_divisor & UART_DIV_MAX;
 		/*
 		 * I assume that nobody is using this. But hey, if somebody
 		 * would like to specify the divisor _and_ the mode then the
@@ -358,7 +359,7 @@ static void omap_8250_set_termios(struct uart_port *port,
 	 * Ask the core to calculate the divisor for us.
 	 */
 	baud = uart_get_baud_rate(port, termios, old,
-				  port->uartclk / 16 / 0xffff,
+				  port->uartclk / 16 / UART_DIV_MAX,
 				  port->uartclk / 13);
 	omap_8250_get_divisor(port, baud, priv);
 
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 0c101a7470b0..b7e0e3416641 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Probe module for 8250/16550-type PCI serial ports.
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  *
  *  Copyright (C) 2001 Russell King, All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
  */
 #undef DEBUG
 #include <linux/module.h>
@@ -3368,6 +3365,7 @@ static const struct pci_device_id blacklist[] = {
 	{ PCI_VDEVICE(INTEL, 0x081c), },
 	{ PCI_VDEVICE(INTEL, 0x081d), },
 	{ PCI_VDEVICE(INTEL, 0x1191), },
+	{ PCI_VDEVICE(INTEL, 0x18d8), },
 	{ PCI_VDEVICE(INTEL, 0x19d8), },
 
 	/* Intel platforms with DesignWare UART */
diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c
index 34f05ed78b68..431e69a5a6a0 100644
--- a/drivers/tty/serial/8250/8250_pnp.c
+++ b/drivers/tty/serial/8250/8250_pnp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Probe for 8250/16550-type ISAPNP serial ports.
  *
@@ -6,10 +7,6 @@
  *  Copyright (C) 2001 Russell King, All Rights Reserved.
  *
  *  Ported to the Linux PnP Layer - (C) Adam Belay.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
  */
 #include <linux/module.h>
 #include <linux/pci.h>
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index f0cc04f62b67..11434551ac0a 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Base port operations for 8250/16550-type serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  *  Split from 8250_core.c, Copyright (C) 2001 Russell King.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  * A note about mapbase / membase
  *
  *  mapbase is the physical address of the IO port.
@@ -1516,7 +1512,6 @@ static inline void __stop_tx(struct uart_8250_port *p)
 			return;
 
 		em485->active_timer = NULL;
-		hrtimer_cancel(&em485->start_tx_timer);
 
 		__stop_tx_rs485(p);
 	}
@@ -1580,8 +1575,6 @@ static inline void start_tx_rs485(struct uart_port *port)
 		serial8250_stop_rx(&up->port);
 
 	em485->active_timer = NULL;
-	if (hrtimer_is_queued(&em485->stop_tx_timer))
-		hrtimer_cancel(&em485->stop_tx_timer);
 
 	mcr = serial8250_in_MCR(up);
 	if (!!(up->port.rs485.flags & SER_RS485_RTS_ON_SEND) !=
@@ -2586,8 +2579,11 @@ static void serial8250_set_divisor(struct uart_port *port, unsigned int baud,
 	serial_dl_write(up, quot);
 
 	/* XR17V35x UARTs have an extra fractional divisor register (DLD) */
-	if (up->port.type == PORT_XR17V35X)
+	if (up->port.type == PORT_XR17V35X) {
+		/* Preserve bits not related to baudrate; DLD[7:4]. */
+		quot_frac |= serial_port_in(port, 0x2) & 0xf0;
 		serial_port_out(port, 0x2, quot_frac);
+	}
 }
 
 static unsigned int serial8250_get_baud_rate(struct uart_port *port,
@@ -2601,7 +2597,7 @@ static unsigned int serial8250_get_baud_rate(struct uart_port *port,
 	 * causing transmission errors.
 	 */
 	return uart_get_baud_rate(port, termios, old,
-				  port->uartclk / 16 / 0xffff,
+				  port->uartclk / 16 / UART_DIV_MAX,
 				  port->uartclk);
 }
 
diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c
index 4d68731af534..b9bcbe20a2be 100644
--- a/drivers/tty/serial/8250/8250_pxa.c
+++ b/drivers/tty/serial/8250/8250_pxa.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  drivers/tty/serial/8250/8250_pxa.c -- driver for PXA on-board UARTS
  *  Copyright:	(C) 2013 Sergei Ianovich <ynvich@gmail.com>
@@ -7,12 +8,6 @@
  *  Copyright:	(C) 2003 Monta Vista Software, Inc.
  *
  *  Based on drivers/serial/8250.c by Russell King.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  */
 
 #include <linux/device.h>
diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c
index 8a10b10e27aa..45ef506293ae 100644
--- a/drivers/tty/serial/8250/8250_uniphier.c
+++ b/drivers/tty/serial/8250/8250_uniphier.c
@@ -1,15 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/tty/serial/8250/serial_cs.c b/drivers/tty/serial/8250/serial_cs.c
index 933c2688dd7e..9963a766dcfb 100644
--- a/drivers/tty/serial/8250/serial_cs.c
+++ b/drivers/tty/serial/8250/serial_cs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
 /*======================================================================
 
     A driver for PCMCIA serial devices
diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c
index 0475f5d261ce..c90e503d6b57 100644
--- a/drivers/tty/serial/altera_jtaguart.c
+++ b/drivers/tty/serial/altera_jtaguart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * altera_jtaguart.c -- Altera JTAG UART driver
  *
@@ -6,11 +7,6 @@
  * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
  * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw>
  * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 3e4b717670d7..b88b05f8e81e 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * altera_uart.c -- Altera UART driver
  *
@@ -6,11 +7,6 @@
  * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
  * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw>
  * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -288,10 +284,10 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data)
 	return IRQ_RETVAL(isr);
 }
 
-static void altera_uart_timer(unsigned long data)
+static void altera_uart_timer(struct timer_list *t)
 {
-	struct uart_port *port = (void *)data;
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
+	struct altera_uart *pp = from_timer(pp, t, tmr);
+	struct uart_port *port = &pp->port;
 
 	altera_uart_interrupt(0, port);
 	mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
@@ -314,7 +310,7 @@ static int altera_uart_startup(struct uart_port *port)
 	int ret;
 
 	if (!port->irq) {
-		setup_timer(&pp->tmr, altera_uart_timer, (unsigned long)port);
+		timer_setup(&pp->tmr, altera_uart_timer, 0);
 		mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
 		return 0;
 	}
diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index 9ec4b8d2879f..2c37d11726ab 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for AMBA serial ports
  *
@@ -6,20 +7,6 @@
  *  Copyright 1999 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * This is a generic driver for ARM AMBA-type serial ports.  They
  * have a lot of 16550-like features, but are not register compatible.
  * Note that although they do have CTS, DCD and DSR inputs, they do
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 111e6a950779..04af8de8617e 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for AMBA serial ports
  *
@@ -7,20 +8,6 @@
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
  *  Copyright (C) 2010 ST-Ericsson SA
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * This is a generic driver for ARM AMBA-type serial ports.  They
  * have a lot of 16550-like features, but are not register compatible.
  * Note that although they do have CTS, DCD and DSR inputs, they do
@@ -281,7 +268,6 @@ struct uart_amba_port {
 	unsigned int		old_status;
 	unsigned int		fifosize;	/* vendor-specific */
 	unsigned int		old_cr;		/* state during shutdown */
-	bool			autorts;
 	unsigned int		fixed_baud;	/* vendor-set fixed baud rate */
 	char			type[12];
 #ifdef CONFIG_DMA_ENGINE
@@ -1078,9 +1064,9 @@ static inline void pl011_dma_rx_stop(struct uart_amba_port *uap)
  * Every polling, It checks the residue in the dma buffer and transfer
  * data to the tty. Also, last_residue is updated for the next polling.
  */
-static void pl011_dma_rx_poll(unsigned long args)
+static void pl011_dma_rx_poll(struct timer_list *t)
 {
-	struct uart_amba_port *uap = (struct uart_amba_port *)args;
+	struct uart_amba_port *uap = from_timer(uap, t, dmarx.timer);
 	struct tty_port *port = &uap->port.state->port;
 	struct pl011_dmarx_data *dmarx = &uap->dmarx;
 	struct dma_chan *rxchan = uap->dmarx.chan;
@@ -1192,9 +1178,7 @@ skip_rx:
 			dev_dbg(uap->port.dev, "could not trigger initial "
 				"RX DMA job, fall back to interrupt mode\n");
 		if (uap->dmarx.poll_rate) {
-			init_timer(&(uap->dmarx.timer));
-			uap->dmarx.timer.function = pl011_dma_rx_poll;
-			uap->dmarx.timer.data = (unsigned long)uap;
+			timer_setup(&uap->dmarx.timer, pl011_dma_rx_poll, 0);
 			mod_timer(&uap->dmarx.timer,
 				jiffies +
 				msecs_to_jiffies(uap->dmarx.poll_rate));
@@ -1588,7 +1572,7 @@ static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl)
 	TIOCMBIT(TIOCM_OUT2, UART011_CR_OUT2);
 	TIOCMBIT(TIOCM_LOOP, UART011_CR_LBE);
 
-	if (uap->autorts) {
+	if (port->status & UPSTAT_AUTORTS) {
 		/* We need to disable auto-RTS if we want to turn RTS off */
 		TIOCMBIT(TIOCM_RTS, UART011_CR_RTSEN);
 	}
@@ -1842,7 +1826,7 @@ static void pl011_disable_uart(struct uart_amba_port *uap)
 {
 	unsigned int cr;
 
-	uap->autorts = false;
+	uap->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
 	spin_lock_irq(&uap->port.lock);
 	cr = pl011_read(uap, REG_CR);
 	uap->old_cr = cr;
@@ -2028,10 +2012,10 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
 			old_cr |= UART011_CR_RTSEN;
 
 		old_cr |= UART011_CR_CTSEN;
-		uap->autorts = true;
+		port->status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
 	} else {
 		old_cr &= ~(UART011_CR_CTSEN | UART011_CR_RTSEN);
-		uap->autorts = false;
+		port->status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
 	}
 
 	if (uap->vendor->oversampling) {
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index dd60ed96a0ad..60cd133ffbbc 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Driver for GRLIB serial ports (APBUART)
  *
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index decc7f3c1ab2..db5df3d54818 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Atheros AR933X SoC built-in UART driver
  *
  *  Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
- *
- *  This program is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 2 as published
- *  by the Free Software Foundation.
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index 77fe306690c4..2599f9ecccfe 100644
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ARC On-Chip(fpga) UART Driver
  *
  * Copyright (C) 2010-2012 Synopsys, Inc. (www.synopsys.com)
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * vineetg: July 10th 2012
  *  -Decoupled the driver from arch/arc
  *    +Using platform_get_resource() for irq/membase (thx to bfin_uart.c)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 7551cab438ff..efa25611ca0c 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for Atmel AT91 Serial ports
  *  Copyright (C) 2003 Rick Bronson
@@ -6,21 +7,6 @@
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  *
  *  DMA support added by Chip Coldwell.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  */
 #include <linux/tty.h>
 #include <linux/ioport.h>
@@ -171,6 +157,7 @@ struct atmel_uart_port {
 	bool			has_hw_timer;
 	struct timer_list	uart_timer;
 
+	bool			tx_stopped;
 	bool			suspended;
 	unsigned int		pending;
 	unsigned int		pending_status;
@@ -380,6 +367,10 @@ static int atmel_config_rs485(struct uart_port *port,
  */
 static u_int atmel_tx_empty(struct uart_port *port)
 {
+	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+	if (atmel_port->tx_stopped)
+		return TIOCSER_TEMT;
 	return (atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXEMPTY) ?
 		TIOCSER_TEMT :
 		0;
@@ -485,6 +476,7 @@ static void atmel_stop_tx(struct uart_port *port)
 	 * is fully transmitted.
 	 */
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXDIS);
+	atmel_port->tx_stopped = true;
 
 	/* Disable interrupts */
 	atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
@@ -521,6 +513,7 @@ static void atmel_start_tx(struct uart_port *port)
 
 	/* re-enable the transmitter */
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN);
+	atmel_port->tx_stopped = false;
 }
 
 /*
@@ -1178,10 +1171,11 @@ chan_err:
 	return -EINVAL;
 }
 
-static void atmel_uart_timer_callback(unsigned long data)
+static void atmel_uart_timer_callback(struct timer_list *t)
 {
-	struct uart_port *port = (void *)data;
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+	struct atmel_uart_port *atmel_port = from_timer(atmel_port, t,
+							uart_timer);
+	struct uart_port *port = &atmel_port->uart;
 
 	if (!atomic_read(&atmel_port->tasklet_shutdown)) {
 		tasklet_schedule(&atmel_port->tasklet_rx);
@@ -1667,29 +1661,6 @@ static void atmel_init_property(struct atmel_uart_port *atmel_port,
 	}
 }
 
-static void atmel_init_rs485(struct uart_port *port,
-				struct platform_device *pdev)
-{
-	struct device_node *np = pdev->dev.of_node;
-
-	struct serial_rs485 *rs485conf = &port->rs485;
-	u32 rs485_delay[2];
-
-	/* rs485 properties */
-	if (of_property_read_u32_array(np, "rs485-rts-delay",
-				       rs485_delay, 2) == 0) {
-		rs485conf->delay_rts_before_send = rs485_delay[0];
-		rs485conf->delay_rts_after_send = rs485_delay[1];
-		rs485conf->flags = 0;
-	}
-
-	if (of_get_property(np, "rs485-rx-during-tx", NULL))
-		rs485conf->flags |= SER_RS485_RX_DURING_TX;
-
-	if (of_get_property(np, "linux,rs485-enabled-at-boot-time", NULL))
-		rs485conf->flags |= SER_RS485_ENABLED;
-}
-
 static void atmel_set_ops(struct uart_port *port)
 {
 	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
@@ -1866,10 +1837,9 @@ static int atmel_startup(struct uart_port *port)
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
 	/* enable xmit & rcvr */
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
+	atmel_port->tx_stopped = false;
 
-	setup_timer(&atmel_port->uart_timer,
-			atmel_uart_timer_callback,
-			(unsigned long)port);
+	timer_setup(&atmel_port->uart_timer, atmel_uart_timer_callback, 0);
 
 	if (atmel_use_pdc_rx(port)) {
 		/* set UART timeout */
@@ -2122,6 +2092,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
 
 	/* disable receiver and transmitter */
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXDIS | ATMEL_US_RXDIS);
+	atmel_port->tx_stopped = true;
 
 	/* mode */
 	if (port->rs485.flags & SER_RS485_ENABLED) {
@@ -2207,6 +2178,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
 	atmel_uart_writel(port, ATMEL_US_BRGR, quot);
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
+	atmel_port->tx_stopped = false;
 
 	/* restore interrupts */
 	atmel_uart_writel(port, ATMEL_US_IER, imr);
@@ -2373,7 +2345,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
 	atmel_init_property(atmel_port, pdev);
 	atmel_set_ops(port);
 
-	atmel_init_rs485(port, pdev);
+	of_get_rs485_mode(pdev->dev.of_node, &port->rs485);
 
 	port->iotype		= UPIO_MEM;
 	port->flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP;
@@ -2450,6 +2422,7 @@ static void atmel_console_write(struct console *co, const char *s, u_int count)
 
 	/* Make sure that tx path is actually able to send characters */
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN);
+	atmel_port->tx_stopped = false;
 
 	uart_console_write(port, s, count, atmel_console_putchar);
 
@@ -2511,6 +2484,7 @@ static int __init atmel_console_setup(struct console *co, char *options)
 {
 	int ret;
 	struct uart_port *port = &atmel_ports[co->index].uart;
+	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
 	int baud = 115200;
 	int bits = 8;
 	int parity = 'n';
@@ -2528,6 +2502,7 @@ static int __init atmel_console_setup(struct console *co, char *options)
 	atmel_uart_writel(port, ATMEL_US_IDR, -1);
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
+	atmel_port->tx_stopped = false;
 
 	if (options)
 		uart_parse_options(options, &baud, &parity, &bits, &flow);
diff --git a/drivers/tty/serial/atmel_serial.h b/drivers/tty/serial/atmel_serial.h
index bd2560502f3c..ba3a2437cde4 100644
--- a/drivers/tty/serial/atmel_serial.h
+++ b/drivers/tty/serial/atmel_serial.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * include/linux/atmel_serial.h
  *
@@ -6,11 +7,6 @@
  *
  * USART registers.
  * Based on AT91RM9200 datasheet revision E.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #ifndef ATMEL_SERIAL_H
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index 8c48c3784831..9d1b7bf7378c 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -1,8 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
  * Derived from many drivers using generic_serial interface.
  *
  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
diff --git a/drivers/tty/serial/bfin_sport_uart.c b/drivers/tty/serial/bfin_sport_uart.c
index 6b03fb12cd19..4ccca5d22f4f 100644
--- a/drivers/tty/serial/bfin_sport_uart.c
+++ b/drivers/tty/serial/bfin_sport_uart.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Blackfin On-Chip Sport Emulated UART Driver
  *
  * Copyright 2006-2009 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
  */
 
 /*
@@ -584,7 +583,7 @@ static void sport_set_termios(struct uart_port *port,
 	spin_unlock_irqrestore(&up->port.lock, flags);
 }
 
-struct uart_ops sport_uart_ops = {
+static const struct uart_ops sport_uart_ops = {
 	.tx_empty	= sport_tx_empty,
 	.set_mctrl	= sport_set_mctrl,
 	.get_mctrl	= sport_get_mctrl,
diff --git a/drivers/tty/serial/bfin_sport_uart.h b/drivers/tty/serial/bfin_sport_uart.h
index e4510ea135ce..4b12f45d6580 100644
--- a/drivers/tty/serial/bfin_sport_uart.h
+++ b/drivers/tty/serial/bfin_sport_uart.h
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Blackfin On-Chip Sport Emulated UART Driver
  *
  * Copyright 2006-2008 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
  */
 
 /*
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index 293ecbb00684..4755fa696321 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Blackfin On-Chip Serial Driver
  *
  * Copyright 2006-2011 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
  */
 
 #if defined(CONFIG_SERIAL_BFIN_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -456,8 +455,9 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart)
 	tty_flip_buffer_push(&uart->port.state->port);
 }
 
-void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart)
+void bfin_serial_rx_dma_timeout(struct timer_list *t)
 {
+	struct bfin_serial_port *uart = from_timer(uart, t, rx_dma_timer);
 	int x_pos, pos;
 	unsigned long flags;
 
@@ -624,8 +624,6 @@ static int bfin_serial_startup(struct uart_port *port)
 	set_dma_start_addr(uart->rx_dma_channel, (unsigned long)uart->rx_dma_buf.buf);
 	enable_dma(uart->rx_dma_channel);
 
-	uart->rx_dma_timer.data = (unsigned long)(uart);
-	uart->rx_dma_timer.function = (void *)bfin_serial_rx_dma_timeout;
 	uart->rx_dma_timer.expires = jiffies + DMA_RX_FLUSH_JIFFIES;
 	add_timer(&(uart->rx_dma_timer));
 #else
@@ -1316,7 +1314,7 @@ static int bfin_serial_probe(struct platform_device *pdev)
 		}
 		uart->rx_dma_channel = res->start;
 
-		init_timer(&(uart->rx_dma_timer));
+		timer_setup(&uart->rx_dma_timer, bfin_serial_rx_dma_timeout, 0);
 #endif
 
 #if defined(SERIAL_BFIN_CTSRTS) || \
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index ac1328629baa..98f193a83392 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for CLPS711x serial ports
  *
@@ -5,11 +6,6 @@
  *
  *  Copyright 1999 ARM Limited
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #if defined(CONFIG_SERIAL_CLPS711X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart.h b/drivers/tty/serial/cpm_uart/cpm_uart.h
index 0ad027b95873..9f175a92fb5d 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart.h
+++ b/drivers/tty/serial/cpm_uart/cpm_uart.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Driver for CPM (SCC/SMC) serial ports
  *
@@ -5,11 +6,6 @@
  *
  *  2006 (c) MontaVista Software, Inc.
  *	Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- *
  */
 #ifndef CPM_UART_H
 #define CPM_UART_H
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 9ac142cfc1f1..24a5f05e769b 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for CPM (SCC/SMC) serial ports; core driver
  *
@@ -12,21 +13,6 @@
  *            (C) 2004 Intracom, S.A.
  *            (C) 2005-2006 MontaVista Software, Inc.
  *		Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
index 6d3b22e93246..4eba17f3d293 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for CPM (SCC/SMC) serial ports; CPM1 definitions
  *
@@ -8,21 +9,6 @@
  *            (C) 2004 Intracom, S.A.
  *            (C) 2006 MontaVista Software, Inc.
  *		Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
index f46d2ca87209..e3bff068dc3c 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for CPM (SCC/SMC) serial ports; CPM2 definitions
  *
@@ -8,21 +9,6 @@
  *            (C) 2004 Intracom, S.A.
  *            (C) 2006 MontaVista Software, Inc.
  *		Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/digicolor-usart.c b/drivers/tty/serial/digicolor-usart.c
index 02ad6953b167..f460cca139e2 100644
--- a/drivers/tty/serial/digicolor-usart.c
+++ b/drivers/tty/serial/digicolor-usart.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for Conexant Digicolor serial ports (USART)
  *
  * Author: Baruch Siach <baruch@tkos.co.il>
  *
  * Copyright (C) 2014 Paradox Innovation Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c
index ff465ff43577..7b57e840e255 100644
--- a/drivers/tty/serial/dz.c
+++ b/drivers/tty/serial/dz.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dz.c: Serial port driver for DECstations equipped
  *       with the DZ chipset.
diff --git a/drivers/tty/serial/earlycon-arm-semihost.c b/drivers/tty/serial/earlycon-arm-semihost.c
index 6bbeb699777c..fa096c10b591 100644
--- a/drivers/tty/serial/earlycon-arm-semihost.c
+++ b/drivers/tty/serial/earlycon-arm-semihost.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2012 ARM Ltd.
  * Author: Marc Zyngier <marc.zyngier@arm.com>
@@ -5,18 +6,6 @@
  * Adapted for ARM and earlycon:
  * Copyright (C) 2014 Linaro Ltd.
  * Author: Rob Herring <robh@kernel.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <linux/kernel.h>
 #include <linux/console.h>
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 98928f082d87..4c8b80f1c688 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2014 Linaro Ltd.
  * Author: Rob Herring <robh@kernel.org>
@@ -5,10 +6,6 @@
  * Based on 8250 earlycon:
  * (c) Copyright 2004 Hewlett-Packard Development Company, L.P.
  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index 9fff25be87f9..d6b5e5463746 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #if defined(CONFIG_SERIAL_EFM32_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #define SUPPORT_SYSRQ
 #endif
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index f0252184291e..c84e6f0db54e 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Freescale lpuart serial port driver
  *
  *  Copyright 2012-2014 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #if defined(CONFIG_SERIAL_FSL_LPUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -1632,12 +1628,11 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
 {
 	struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
 	unsigned long flags;
-	unsigned long ctrl, old_ctrl, bd, modem;
+	unsigned long ctrl, old_ctrl, modem;
 	unsigned int  baud;
 	unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
 
 	ctrl = old_ctrl = lpuart32_read(&sport->port, UARTCTRL);
-	bd = lpuart32_read(&sport->port, UARTBAUD);
 	modem = lpuart32_read(&sport->port, UARTMODIR);
 	/*
 	 * only support CS8 and CS7, and for CS7 must enable PE.
@@ -2212,6 +2207,24 @@ static int lpuart_probe(struct platform_device *pdev)
 	if (ret)
 		goto failed_attach_port;
 
+	of_get_rs485_mode(np, &sport->port.rs485);
+
+	if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX) {
+		dev_err(&pdev->dev, "driver doesn't support RX during TX\n");
+		return -ENOSYS;
+	}
+
+	if (sport->port.rs485.delay_rts_before_send ||
+	    sport->port.rs485.delay_rts_after_send) {
+		dev_err(&pdev->dev, "driver doesn't support RTS delays\n");
+		return -ENOSYS;
+	}
+
+	if (sport->port.rs485.flags & SER_RS485_ENABLED) {
+		sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND;
+		writeb(UARTMODEM_TXRTSE, sport->port.membase + UARTMODEM);
+	}
+
 	sport->dma_tx_chan = dma_request_slave_channel(sport->port.dev, "tx");
 	if (!sport->dma_tx_chan)
 		dev_info(sport->port.dev, "DMA tx channel request failed, "
@@ -2222,12 +2235,6 @@ static int lpuart_probe(struct platform_device *pdev)
 		dev_info(sport->port.dev, "DMA rx channel request failed, "
 				"operating without rx DMA\n");
 
-	if (of_property_read_bool(np, "linux,rs485-enabled-at-boot-time")) {
-		sport->port.rs485.flags |= SER_RS485_ENABLED;
-		sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND;
-		writeb(UARTMODEM_TXRTSE, sport->port.membase + UARTMODEM);
-	}
-
 	return 0;
 
 failed_attach_port:
diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index fe92d74f4ea5..ad374f7c476d 100644
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
   * icom.c
   *
@@ -6,21 +7,6 @@
   * Serial device driver.
   *
   * Based on code from serial.c
-  *
-  * This program is free software; you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License as published by
-  * the Free Software Foundation; either version 2 of the License, or
-  * (at your option) any later version.
-  *
-  * This program is distributed in the hope that it will be useful,
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  * GNU General Public License for more details.
-  *
-  * You should have received a copy of the GNU General Public License
-  * along with this program; if not, write to the Free Software
-  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
-  *
   */
 #include <linux/module.h>
 #include <linux/kernel.h>
diff --git a/drivers/tty/serial/icom.h b/drivers/tty/serial/icom.h
index c8029e0025c9..8a77e739b333 100644
--- a/drivers/tty/serial/icom.h
+++ b/drivers/tty/serial/icom.h
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * icom.h
  *
  * Copyright (C) 2001 Michael Anderson, IBM Corporation
  *
  * Serial device driver include file.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/serial_core.h>
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index f190a84a0246..473f4f81d690 100644
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /****************************************************************************
  *
  * Driver for the IFX 6x60 spi modem.
@@ -10,20 +11,6 @@
  * Copyright (C) 2009, 2010 Intel Corp
  * Russ Gorby <russ.gorby@intel.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA
- *
  * Driver modified by Intel from Option gtm501l_spi.c
  *
  * Notes
@@ -1029,9 +1016,8 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
 	spin_lock_init(&ifx_dev->write_lock);
 	spin_lock_init(&ifx_dev->power_lock);
 	ifx_dev->power_status = 0;
-	init_timer(&ifx_dev->spi_timer);
-	ifx_dev->spi_timer.function = ifx_spi_timeout;
-	ifx_dev->spi_timer.data = (unsigned long)ifx_dev;
+	setup_timer(&ifx_dev->spi_timer, ifx_spi_timeout,
+		    (unsigned long)ifx_dev);
 	ifx_dev->modem = pl_data->modem_type;
 	ifx_dev->use_dma = pl_data->use_dma;
 	ifx_dev->max_hz = pl_data->max_hz;
diff --git a/drivers/tty/serial/ifx6x60.h b/drivers/tty/serial/ifx6x60.h
index 4fbddc297839..c5a2514212ff 100644
--- a/drivers/tty/serial/ifx6x60.h
+++ b/drivers/tty/serial/ifx6x60.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /****************************************************************************
  *
  * Driver for the IFX spi modem.
@@ -5,23 +6,6 @@
  * Copyright (C) 2009, 2010 Intel Corp
  * Jim Stanley <jim.stanley@intel.com>
  *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA
- *
- *
- *
  *****************************************************************************/
 #ifndef _IFX6X60_H
 #define _IFX6X60_H
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index dfeff3951f93..a67a606c38eb 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for Motorola/Freescale IMX serial ports
  *
@@ -5,16 +6,6 @@
  *
  * Author: Sascha Hauer <sascha@saschahauer.de>
  * Copyright (C) 2004 Pengutronix
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #if defined(CONFIG_SERIAL_IMX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -334,7 +325,8 @@ static void imx_port_rts_active(struct imx_port *sport, unsigned long *ucr2)
 {
 	*ucr2 &= ~(UCR2_CTSC | UCR2_CTS);
 
-	mctrl_gpio_set(sport->gpios, sport->port.mctrl | TIOCM_RTS);
+	sport->port.mctrl |= TIOCM_RTS;
+	mctrl_gpio_set(sport->gpios, sport->port.mctrl);
 }
 
 static void imx_port_rts_inactive(struct imx_port *sport, unsigned long *ucr2)
@@ -342,7 +334,8 @@ static void imx_port_rts_inactive(struct imx_port *sport, unsigned long *ucr2)
 	*ucr2 &= ~UCR2_CTSC;
 	*ucr2 |= UCR2_CTS;
 
-	mctrl_gpio_set(sport->gpios, sport->port.mctrl & ~TIOCM_RTS);
+	sport->port.mctrl &= ~TIOCM_RTS;
+	mctrl_gpio_set(sport->gpios, sport->port.mctrl);
 }
 
 static void imx_port_rts_auto(struct imx_port *sport, unsigned long *ucr2)
@@ -714,8 +707,6 @@ static void imx_disable_rx_int(struct imx_port *sport)
 {
 	unsigned long temp;
 
-	sport->dma_is_rxing = 1;
-
 	/* disable the receiver ready and aging timer interrupts */
 	temp = readl(sport->port.membase + UCR1);
 	temp &= ~(UCR1_RRDYEN);
@@ -732,29 +723,6 @@ static void imx_disable_rx_int(struct imx_port *sport)
 }
 
 static void clear_rx_errors(struct imx_port *sport);
-static int start_rx_dma(struct imx_port *sport);
-/*
- * If the RXFIFO is filled with some data, and then we
- * arise a DMA operation to receive them.
- */
-static void imx_dma_rxint(struct imx_port *sport)
-{
-	unsigned long temp;
-	unsigned long flags;
-
-	spin_lock_irqsave(&sport->port.lock, flags);
-
-	temp = readl(sport->port.membase + USR2);
-	if ((temp & USR2_RDR) && !sport->dma_is_rxing) {
-
-		imx_disable_rx_int(sport);
-
-		/* tell the DMA to receive the data. */
-		start_rx_dma(sport);
-	}
-
-	spin_unlock_irqrestore(&sport->port.lock, flags);
-}
 
 /*
  * We have a modem side uart, so the meanings of RTS and CTS are inverted.
@@ -816,11 +784,8 @@ static irqreturn_t imx_int(int irq, void *dev_id)
 	sts = readl(sport->port.membase + USR1);
 	sts2 = readl(sport->port.membase + USR2);
 
-	if (sts & (USR1_RRDY | USR1_AGTIM)) {
-		if (sport->dma_is_enabled)
-			imx_dma_rxint(sport);
-		else
-			imx_rxint(irq, dev_id);
+	if (!sport->dma_is_enabled && (sts & (USR1_RRDY | USR1_AGTIM))) {
+		imx_rxint(irq, dev_id);
 		ret = IRQ_HANDLED;
 	}
 
@@ -1074,6 +1039,7 @@ static int start_rx_dma(struct imx_port *sport)
 	desc->callback_param = sport;
 
 	dev_dbg(dev, "RX: prepare for the DMA.\n");
+	sport->dma_is_rxing = 1;
 	sport->rx_cookie = dmaengine_submit(desc);
 	dma_async_issue_pending(chan);
 	return 0;
@@ -1165,7 +1131,7 @@ static int imx_uart_dma_init(struct imx_port *sport)
 		goto err;
 	}
 
-	sport->rx_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+	sport->rx_buf = kzalloc(RX_BUF_SIZE, GFP_KERNEL);
 	if (!sport->rx_buf) {
 		ret = -ENOMEM;
 		goto err;
@@ -1207,10 +1173,6 @@ static void imx_enable_dma(struct imx_port *sport)
 	temp |= UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN;
 	writel(temp, sport->port.membase + UCR1);
 
-	temp = readl(sport->port.membase + UCR2);
-	temp |= UCR2_ATEN;
-	writel(temp, sport->port.membase + UCR2);
-
 	imx_setup_ufcr(sport, TXTL_DMA, RXTL_DMA);
 
 	sport->dma_is_enabled = 1;
@@ -1411,15 +1373,19 @@ static void imx_flush_buffer(struct uart_port *port)
 		temp = readl(sport->port.membase + UCR1);
 		temp &= ~UCR1_TDMAEN;
 		writel(temp, sport->port.membase + UCR1);
-		sport->dma_is_txing = false;
+		sport->dma_is_txing = 0;
 	}
 
 	/*
 	 * According to the Reference Manual description of the UART SRST bit:
+	 *
 	 * "Reset the transmit and receive state machines,
 	 * all FIFOs and register USR1, USR2, UBIR, UBMR, UBRC, URXD, UTXD
-	 * and UTS[6-3]". As we don't need to restore the old values from
-	 * USR1, USR2, URXD, UTXD, only save/restore the other four registers
+	 * and UTS[6-3]".
+	 *
+	 * We don't need to restore the old values from USR1, USR2, URXD and
+	 * UTXD. UBRC is read only, so only save/restore the other three
+	 * registers.
 	 */
 	ubir = readl(sport->port.membase + UBIR);
 	ubmr = readl(sport->port.membase + UBMR);
@@ -2051,6 +2017,8 @@ static int serial_imx_probe_dt(struct imx_port *sport,
 	if (of_get_property(np, "rts-gpios", NULL))
 		sport->have_rtsgpio = 1;
 
+	of_get_rs485_mode(np, &sport->port.rs485);
+
 	return 0;
 }
 #else
@@ -2112,12 +2080,9 @@ static int serial_imx_probe(struct platform_device *pdev)
 	sport->port.fifosize = 32;
 	sport->port.ops = &imx_pops;
 	sport->port.rs485_config = imx_rs485_config;
-	sport->port.rs485.flags =
-		SER_RS485_RTS_ON_SEND | SER_RS485_RX_DURING_TX;
+	sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND;
 	sport->port.flags = UPF_BOOT_AUTOCONF;
-	init_timer(&sport->timer);
-	sport->timer.function = imx_timeout;
-	sport->timer.data     = (unsigned long)sport;
+	setup_timer(&sport->timer, imx_timeout, (unsigned long)sport);
 
 	sport->gpios = mctrl_gpio_init(&sport->port, 0);
 	if (IS_ERR(sport->gpios))
@@ -2346,11 +2311,39 @@ static int imx_serial_port_resume(struct device *dev)
 	return 0;
 }
 
+static int imx_serial_port_freeze(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct imx_port *sport = platform_get_drvdata(pdev);
+
+	uart_suspend_port(&imx_reg, &sport->port);
+
+	/* Needed to enable clock in suspend_noirq */
+	return clk_prepare(sport->clk_ipg);
+}
+
+static int imx_serial_port_thaw(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct imx_port *sport = platform_get_drvdata(pdev);
+
+	uart_resume_port(&imx_reg, &sport->port);
+
+	clk_unprepare(sport->clk_ipg);
+
+	return 0;
+}
+
 static const struct dev_pm_ops imx_serial_port_pm_ops = {
 	.suspend_noirq = imx_serial_port_suspend_noirq,
 	.resume_noirq = imx_serial_port_resume_noirq,
+	.freeze_noirq = imx_serial_port_suspend_noirq,
+	.restore_noirq = imx_serial_port_resume_noirq,
 	.suspend = imx_serial_port_suspend,
 	.resume = imx_serial_port_resume,
+	.freeze = imx_serial_port_freeze,
+	.thaw = imx_serial_port_thaw,
+	.restore = imx_serial_port_thaw,
 };
 
 static struct platform_driver serial_imx_driver = {
diff --git a/drivers/tty/serial/ioc3_serial.c b/drivers/tty/serial/ioc3_serial.c
index 906ee770ff4a..d8a1cdd6a53d 100644
--- a/drivers/tty/serial/ioc3_serial.c
+++ b/drivers/tty/serial/ioc3_serial.c
@@ -1,8 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
  * Copyright (C) 2005 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
diff --git a/drivers/tty/serial/ioc4_serial.c b/drivers/tty/serial/ioc4_serial.c
index 43d7d32eb150..db5b979e5a0c 100644
--- a/drivers/tty/serial/ioc4_serial.c
+++ b/drivers/tty/serial/ioc4_serial.c
@@ -1,8 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
  * Copyright (C) 2003-2006 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
diff --git a/drivers/tty/serial/ip22zilog.c b/drivers/tty/serial/ip22zilog.c
index 7ddddb4c3844..8c810733df3d 100644
--- a/drivers/tty/serial/ip22zilog.c
+++ b/drivers/tty/serial/ip22zilog.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for Zilog serial chips found on SGI workstations and
  * servers.  This driver could actually be made more generic.
diff --git a/drivers/tty/serial/jsm/jsm.h b/drivers/tty/serial/jsm/jsm.h
index 0b79b87df47d..7a128aaa3a66 100644
--- a/drivers/tty/serial/jsm/jsm.h
+++ b/drivers/tty/serial/jsm/jsm.h
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /************************************************************************
  * Copyright 2003 Digi International (www.digi.com)
  *
  * Copyright (C) 2004 IBM Corporation. All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE.  See the GNU General Public License for more details.
- *
  * Contact Information:
  * Scott H Kilau <Scott_Kilau@digi.com>
  * Wendy Xiong   <wendyx@us.ibm.com>
diff --git a/drivers/tty/serial/jsm/jsm_cls.c b/drivers/tty/serial/jsm/jsm_cls.c
index 4eb12a9cae76..c061a7b7bd23 100644
--- a/drivers/tty/serial/jsm/jsm_cls.c
+++ b/drivers/tty/serial/jsm/jsm_cls.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2003 Digi International (www.digi.com)
  *	Scott H Kilau <Scott_Kilau at digi dot com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE.  See the GNU General Public License for more details.
- *
  *	NOTE TO LINUX KERNEL HACKERS:  DO NOT REFORMAT THIS CODE!
  *
  *	This is shared code between Digi's CVS archive and the
diff --git a/drivers/tty/serial/jsm/jsm_driver.c b/drivers/tty/serial/jsm/jsm_driver.c
index 102d499814ac..592e51d8944e 100644
--- a/drivers/tty/serial/jsm/jsm_driver.c
+++ b/drivers/tty/serial/jsm/jsm_driver.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /************************************************************************
  * Copyright 2003 Digi International (www.digi.com)
  *
  * Copyright (C) 2004 IBM Corporation. All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE.  See the GNU General Public License for more details.
- *
  * Contact Information:
  * Scott H Kilau <Scott_Kilau@digi.com>
  * Wendy Xiong   <wendyx@us.ibm.com>
diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c
index c6fdd6369534..4718560b8fdc 100644
--- a/drivers/tty/serial/jsm/jsm_neo.c
+++ b/drivers/tty/serial/jsm/jsm_neo.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /************************************************************************
  * Copyright 2003 Digi International (www.digi.com)
  *
  * Copyright (C) 2004 IBM Corporation. All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE.  See the GNU General Public License for more details.
- *
  * Contact Information:
  * Scott H Kilau <Scott_Kilau@digi.com>
  * Wendy Xiong   <wendyx@us.ibm.com>
diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c
index ec7d8383900f..469927d37b41 100644
--- a/drivers/tty/serial/jsm/jsm_tty.c
+++ b/drivers/tty/serial/jsm/jsm_tty.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /************************************************************************
  * Copyright 2003 Digi International (www.digi.com)
  *
  * Copyright (C) 2004 IBM Corporation. All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE.  See the GNU General Public License for more details.
- *
  * Contact Information:
  * Scott H Kilau <Scott_Kilau@digi.com>
  * Ananda Venkatarman <mansarov@us.ibm.com>
@@ -36,7 +27,7 @@ static void jsm_carrier(struct jsm_channel *ch);
 static inline int jsm_get_mstat(struct jsm_channel *ch)
 {
 	unsigned char mstat;
-	unsigned result;
+	int result;
 
 	jsm_dbg(IOCTL, &ch->ch_bd->pci_dev, "start\n");
 
@@ -124,6 +115,7 @@ static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
 static void jsm_tty_write(struct uart_port *port)
 {
 	struct jsm_channel *channel;
+
 	channel = container_of(port, struct jsm_channel, uart_port);
 	channel->ch_bd->bd_ops->copy_data_from_queue_to_uart(channel);
 }
@@ -275,14 +267,12 @@ static int jsm_tty_open(struct uart_port *port)
 static void jsm_tty_close(struct uart_port *port)
 {
 	struct jsm_board *bd;
-	struct ktermios *ts;
 	struct jsm_channel *channel =
 		container_of(port, struct jsm_channel, uart_port);
 
 	jsm_dbg(CLOSE, &channel->ch_bd->pci_dev, "start\n");
 
 	bd = channel->ch_bd;
-	ts = &port->state->port.tty->termios;
 
 	channel->ch_flags &= ~(CH_STOPI);
 
@@ -473,12 +463,11 @@ int jsm_uart_port_init(struct jsm_board *brd)
 		} else
 			set_bit(line, linemap);
 		brd->channels[i]->uart_port.line = line;
-		rc = uart_add_one_port (&jsm_uart_driver, &brd->channels[i]->uart_port);
-		if (rc){
+		rc = uart_add_one_port(&jsm_uart_driver, &brd->channels[i]->uart_port);
+		if (rc) {
 			printk(KERN_INFO "jsm: Port %d failed. Aborting...\n", i);
 			return rc;
-		}
-		else
+		} else
 			printk(KERN_INFO "jsm: Port %d added\n", i);
 	}
 
@@ -541,7 +530,7 @@ void jsm_input(struct jsm_channel *ch)
 	tp = port->tty;
 
 	bd = ch->ch_bd;
-	if(!bd)
+	if (!bd)
 		return;
 
 	spin_lock_irqsave(&ch->ch_lock, lock_flags);
@@ -781,7 +770,7 @@ void jsm_check_queue_flow_control(struct jsm_channel *ch)
 	if (qleft < 256) {
 		/* HWFLOW */
 		if (ch->ch_c_cflag & CRTSCTS) {
-			if(!(ch->ch_flags & CH_RECEIVER_OFF)) {
+			if (!(ch->ch_flags & CH_RECEIVER_OFF)) {
 				bd_ops->disable_receiver(ch);
 				ch->ch_flags |= (CH_RECEIVER_OFF);
 				jsm_dbg(READ, &ch->ch_bd->pci_dev,
diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c
index 117df151627d..ed2b03058627 100644
--- a/drivers/tty/serial/kgdb_nmi.c
+++ b/drivers/tty/serial/kgdb_nmi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * KGDB NMI serial console
  *
@@ -6,10 +7,6 @@
  *		  Colin Cross <ccross@android.com>
  * Copyright 2012 Linaro Ltd.
  *		  Anton Vorontsov <anton.vorontsov@linaro.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index a260cde743e2..ddb46fa2d07f 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Based on the same principle as kgdboe using the NETPOLL api, this
  * driver uses a console polling api to implement a gdb serial inteface
@@ -6,10 +7,6 @@
  * Maintainer: Jason Wessel <jason.wessel@windriver.com>
  *
  * 2007-2008 (c) Jason Wessel - Wind River Systems, Inc.
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 #include <linux/kernel.h>
 #include <linux/ctype.h>
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 22df94f107e5..044128277248 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * Copyright (C) 2004 Infineon IFAP DC COM CPE
  * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
  * Copyright (C) 2007 John Crispin <john@phrozen.org>
diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index cea57ff32c33..d1d73261575b 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * High Speed Serial Ports on NXP LPC32xx SoC
  *
@@ -6,16 +7,6 @@
  *
  * Copyright (C) 2010 NXP Semiconductors
  * Copyright (C) 2012 Roland Stigge
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c
index 5b3bd9511993..7b83a8aab495 100644
--- a/drivers/tty/serial/m32r_sio.c
+++ b/drivers/tty/serial/m32r_sio.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  m32r_sio.c
  *
@@ -8,11 +9,6 @@
  *
  *  Copyright (C) 2001  Russell King.
  *  Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 /*
@@ -511,9 +507,9 @@ static void serial_unlink_irq_chain(struct uart_sio_port *up)
 /*
  * This function is used to handle ports that do not have an interrupt.
  */
-static void m32r_sio_timeout(unsigned long data)
+static void m32r_sio_timeout(struct timer_list *t)
 {
-	struct uart_sio_port *up = (struct uart_sio_port *)data;
+	struct uart_sio_port *up = from_timer(up, t, timer);
 	unsigned int timeout;
 	unsigned int sts;
 
@@ -576,7 +572,6 @@ static int m32r_sio_startup(struct uart_port *port)
 
 		timeout = timeout > 6 ? (timeout / 2 - 2) : 1;
 
-		up->timer.data = (unsigned long)up;
 		mod_timer(&up->timer, jiffies + timeout);
 	} else {
 		retval = serial_link_irq_chain(up);
@@ -907,8 +902,7 @@ static void __init m32r_sio_register_ports(struct uart_driver *drv)
 
 		up->port.line = i;
 		up->port.ops = &m32r_sio_pops;
-		init_timer(&up->timer);
-		up->timer.function = m32r_sio_timeout;
+		timer_setup(&up->timer, m32r_sio_timeout, 0);
 
 		uart_add_one_port(drv, &up->port);
 	}
diff --git a/drivers/tty/serial/m32r_sio_reg.h b/drivers/tty/serial/m32r_sio_reg.h
index 4671473793e3..6eed48828f94 100644
--- a/drivers/tty/serial/m32r_sio_reg.h
+++ b/drivers/tty/serial/m32r_sio_reg.h
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  * m32r_sio_reg.h
  *
  * Copyright (C) 1992, 1994 by Theodore Ts'o.
  * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
  *
- * Redistribution of this file is permitted under the terms of the GNU
- * Public License (GPL)
- *
  * These are the UART port assignments, expressed as offsets from the base
  * register.  These assignments should hold for any serial port based on
  * a 8250, 16450, or 16550(A).
diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c
index ace82645b123..27d6049eb6a9 100644
--- a/drivers/tty/serial/max3100.c
+++ b/drivers/tty/serial/max3100.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *
  *  Copyright (C) 2008 Christian Pellegrin <chripell@evolware.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- *
  * Notes: the MAX3100 doesn't provide an interrupt on CTS so we have
  * to use polling for flow control. TX empty IRQ is unusable, since
  * writing conf clears FIFO buffer and we cannot have this interrupt
@@ -263,7 +258,7 @@ static void max3100_work(struct work_struct *w)
 	struct max3100_port *s = container_of(w, struct max3100_port, work);
 	int rxchars;
 	u16 tx, rx;
-	int conf, cconf, rts, crts;
+	int conf, cconf, crts;
 	struct circ_buf *xmit = &s->port.state->xmit;
 
 	dev_dbg(&s->spi->dev, "%s\n", __func__);
@@ -274,7 +269,6 @@ static void max3100_work(struct work_struct *w)
 		conf = s->conf;
 		cconf = s->conf_commit;
 		s->conf_commit = 0;
-		rts = s->rts;
 		crts = s->rts_commit;
 		s->rts_commit = 0;
 		spin_unlock(&s->conf_lock);
@@ -436,7 +430,6 @@ max3100_set_termios(struct uart_port *port, struct ktermios *termios,
 	dev_dbg(&s->spi->dev, "%s\n", __func__);
 
 	cflag = termios->c_cflag;
-	param_new = 0;
 	param_mask = 0;
 
 	baud = tty_termios_baud_rate(termios);
@@ -787,9 +780,8 @@ static int max3100_probe(struct spi_device *spi)
 		max3100s[i]->poll_time = 1;
 	max3100s[i]->max3100_hw_suspend = pdata->max3100_hw_suspend;
 	max3100s[i]->minor = i;
-	init_timer(&max3100s[i]->timer);
-	max3100s[i]->timer.function = max3100_timeout;
-	max3100s[i]->timer.data = (unsigned long) max3100s[i];
+	setup_timer(&max3100s[i]->timer, max3100_timeout,
+		    (unsigned long)max3100s[i]);
 
 	dev_dbg(&spi->dev, "%s: adding port %d\n", __func__, i);
 	max3100s[i]->port.irq = max3100s[i]->irq;
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 9dfedbe6c071..ecb6513a6505 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver
  *
@@ -6,11 +7,6 @@
  *  Based on max3100.c, by Christian Pellegrin <chripell@evolware.org>
  *  Based on max3110.c, by Feng Tang <feng.tang@intel.com>
  *  Based on max3107.c, by Aavamobile
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
  */
 
 #include <linux/bitops.h>
diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c
index 02eb32217685..7dbfb4cde124 100644
--- a/drivers/tty/serial/mcf.c
+++ b/drivers/tty/serial/mcf.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /****************************************************************************/
 
 /*
  *	mcf.c -- Freescale ColdFire UART driver
  *
  *	(C) Copyright 2003-2007, Greg Ungerer <gerg@uclinux.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 /****************************************************************************/
diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c
index e72ea61c70db..ef89534dd760 100644
--- a/drivers/tty/serial/men_z135_uart.c
+++ b/drivers/tty/serial/men_z135_uart.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MEN 16z135 High Speed UART
  *
  * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
  * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; version 2 of the License.
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ":" fmt
 
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 07c0f98be3ac..daafe60175da 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -1,19 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Based on meson_uart.c, by AMLOGIC, INC.
  *
  * Copyright (C) 2014 Carlo Caione <carlo@caione.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
+#if defined(CONFIG_SERIAL_MESON_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
 #include <linux/clk.h>
 #include <linux/console.h>
 #include <linux/delay.h>
@@ -183,12 +178,12 @@ static void meson_receive_chars(struct uart_port *port)
 {
 	struct tty_port *tport = &port->state->port;
 	char flag;
-	u32 status, ch, mode;
+	u32 ostatus, status, ch, mode;
 
 	do {
 		flag = TTY_NORMAL;
 		port->icount.rx++;
-		status = readl(port->membase + AML_UART_STATUS);
+		ostatus = status = readl(port->membase + AML_UART_STATUS);
 
 		if (status & AML_UART_ERR) {
 			if (status & AML_UART_TX_FIFO_WERR)
@@ -216,6 +211,16 @@ static void meson_receive_chars(struct uart_port *port)
 		ch = readl(port->membase + AML_UART_RFIFO);
 		ch &= 0xff;
 
+		if ((ostatus & AML_UART_FRAME_ERR) && (ch == 0)) {
+			port->icount.brk++;
+			flag = TTY_BREAK;
+			if (uart_handle_break(port))
+				continue;
+		}
+
+		if (uart_handle_sysrq_char(port, ch))
+			continue;
+
 		if ((status & port->ignore_status_mask) == 0)
 			tty_insert_flip_char(tport, ch, flag);
 
@@ -362,7 +367,7 @@ static void meson_uart_set_termios(struct uart_port *port,
 
 	writel(val, port->membase + AML_UART_CONTROL);
 
-	baud = uart_get_baud_rate(port, termios, old, 9600, 4000000);
+	baud = uart_get_baud_rate(port, termios, old, 50, 4000000);
 	meson_uart_change_speed(port, baud);
 
 	port->read_status_mask = AML_UART_TX_FIFO_WERR;
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index 791c4c74f6d6..3a75ee08d619 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for the PSC of the Freescale MPC52xx PSCs configured as UARTs.
  *
@@ -23,10 +24,6 @@
  *                    Grant Likely <grant.likely@secretlab.ca>
  * Copyright (C) 2004-2006 Sylvain Munaut <tnt@246tNt.com>
  * Copyright (C) 2003 MontaVista, Software, Inc.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
  */
 
 #undef DEBUG
diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
index 492ec4b375a0..9f8f63719126 100644
--- a/drivers/tty/serial/mps2-uart.c
+++ b/drivers/tty/serial/mps2-uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MPS2 UART driver
  *
@@ -5,10 +6,6 @@
  *
  * Author: Vladimir Murzin <vladimir.murzin@arm.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * TODO: support for SysRq
  */
 
diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c
index 67ffecc50e42..1f60d6fe4ff2 100644
--- a/drivers/tty/serial/mpsc.c
+++ b/drivers/tty/serial/mpsc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generic driver for the MPSC (UART mode) on Marvell parts (e.g., GT64240,
  * GT64260, MV64340, MV64360, GT96100, ... ).
@@ -10,10 +11,7 @@
  * taken from PPCBoot (now U-Boot).  Also based on drivers/serial/8250.c
  * by Russell King.
  *
- * 2004 (c) MontaVista, Software, Inc.  This file is licensed under
- * the terms of the GNU General Public License version 2.  This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
+ * 2004 (c) MontaVista, Software, Inc.
  */
 /*
  * The MPSC interface is much like a typical network controller's interface.
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 1db79ee8a886..ee96cf0d0057 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for msm7k serial device and console
  *
  * Copyright (C) 2007 Google, Inc.
  * Author: Robert Love <rlove@google.com>
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #if defined(CONFIG_SERIAL_MSM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index 2bff69e70e4b..3b74369c262f 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
 ** mux.c:
 **	serial driver for the Mux console found in some PA-RISC servers.
@@ -5,11 +6,6 @@
 **	(c) Copyright 2002 Ryan Bradetich
 **	(c) Copyright 2002 Hewlett-Packard Company
 **
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU General Public License as published by
-** the Free Software Foundation; either version 2 of the License, or
-** (at your option) any later version.
-**
 ** This Driver currently only supports the console (port 0) on the MUX.
 ** Additional work will be needed on this driver to enable the full
 ** functionality of the MUX.
@@ -576,8 +572,7 @@ static int __init mux_init(void)
 
 	if(port_cnt > 0) {
 		/* Start the Mux timer */
-		init_timer(&mux_timer);
-		mux_timer.function = mux_poll;
+		setup_timer(&mux_timer, mux_poll, 0UL);
 		mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY);
 
 #ifdef CONFIG_SERIAL_MUX_CONSOLE
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
index 45b57c294d13..a100e98259d7 100644
--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -1,21 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
 * ***************************************************************************
 * Marvell Armada-3700 Serial Driver
 * Author: Wilson Ding <dingwei@marvell.com>
 * Copyright (C) 2015 Marvell International Ltd.
 * ***************************************************************************
-* This program is free software: you can redistribute it and/or modify it
-* under the terms of the GNU General Public License as published by the Free
-* Software Foundation, either version 2 of the License, or any later version.
-*
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-* GNU General Public License for more details.
-*
-* You should have received a copy of the GNU General Public License
-* along with this program.  If not, see <http://www.gnu.org/licenses/>.
-* ***************************************************************************
 */
 
 #include <linux/clk.h>
@@ -38,46 +27,40 @@
 #include <linux/tty_flip.h>
 
 /* Register Map */
-#define UART_RBR		0x00
-#define  RBR_BRK_DET		BIT(15)
-#define  RBR_FRM_ERR_DET	BIT(14)
-#define  RBR_PAR_ERR_DET	BIT(13)
-#define  RBR_OVR_ERR_DET	BIT(12)
+#define UART_STD_RBR		0x00
+#define UART_EXT_RBR		0x18
 
-#define UART_TSH		0x04
+#define UART_STD_TSH		0x04
+#define UART_EXT_TSH		0x1C
 
-#define UART_CTRL		0x08
+#define UART_STD_CTRL1		0x08
+#define UART_EXT_CTRL1		0x04
 #define  CTRL_SOFT_RST		BIT(31)
 #define  CTRL_TXFIFO_RST	BIT(15)
 #define  CTRL_RXFIFO_RST	BIT(14)
-#define  CTRL_ST_MIRR_EN	BIT(13)
-#define  CTRL_LPBK_EN		BIT(12)
 #define  CTRL_SND_BRK_SEQ	BIT(11)
-#define  CTRL_PAR_EN		BIT(10)
-#define  CTRL_TWO_STOP		BIT(9)
-#define  CTRL_TX_HFL_INT	BIT(8)
-#define  CTRL_RX_HFL_INT	BIT(7)
-#define  CTRL_TX_EMP_INT	BIT(6)
-#define  CTRL_TX_RDY_INT	BIT(5)
-#define  CTRL_RX_RDY_INT	BIT(4)
 #define  CTRL_BRK_DET_INT	BIT(3)
 #define  CTRL_FRM_ERR_INT	BIT(2)
 #define  CTRL_PAR_ERR_INT	BIT(1)
 #define  CTRL_OVR_ERR_INT	BIT(0)
-#define  CTRL_RX_INT			(CTRL_RX_RDY_INT | CTRL_BRK_DET_INT |\
-	CTRL_FRM_ERR_INT | CTRL_PAR_ERR_INT | CTRL_OVR_ERR_INT)
+#define  CTRL_BRK_INT		(CTRL_BRK_DET_INT | CTRL_FRM_ERR_INT | \
+				CTRL_PAR_ERR_INT | CTRL_OVR_ERR_INT)
+
+#define UART_STD_CTRL2		UART_STD_CTRL1
+#define UART_EXT_CTRL2		0x20
+#define  CTRL_STD_TX_RDY_INT	BIT(5)
+#define  CTRL_EXT_TX_RDY_INT	BIT(6)
+#define  CTRL_STD_RX_RDY_INT	BIT(4)
+#define  CTRL_EXT_RX_RDY_INT	BIT(5)
 
-#define UART_STAT		0x0c
+#define UART_STAT		0x0C
 #define  STAT_TX_FIFO_EMP	BIT(13)
-#define  STAT_RX_FIFO_EMP	BIT(12)
 #define  STAT_TX_FIFO_FUL	BIT(11)
-#define  STAT_TX_FIFO_HFL	BIT(10)
-#define  STAT_RX_TOGL		BIT(9)
-#define  STAT_RX_FIFO_FUL	BIT(8)
-#define  STAT_RX_FIFO_HFL	BIT(7)
 #define  STAT_TX_EMP		BIT(6)
-#define  STAT_TX_RDY		BIT(5)
-#define  STAT_RX_RDY		BIT(4)
+#define  STAT_STD_TX_RDY	BIT(5)
+#define  STAT_EXT_TX_RDY	BIT(15)
+#define  STAT_STD_RX_RDY	BIT(4)
+#define  STAT_EXT_RX_RDY	BIT(14)
 #define  STAT_BRK_DET		BIT(3)
 #define  STAT_FRM_ERR		BIT(2)
 #define  STAT_PAR_ERR		BIT(1)
@@ -86,18 +69,73 @@
 				 | STAT_PAR_ERR | STAT_OVR_ERR)
 
 #define UART_BRDV		0x10
+#define  BRDV_BAUD_MASK         0x3FF
 
-#define MVEBU_NR_UARTS		1
+#define MVEBU_NR_UARTS		2
 
 #define MVEBU_UART_TYPE		"mvebu-uart"
+#define DRIVER_NAME		"mvebu_serial"
+
+enum {
+	/* Either there is only one summed IRQ... */
+	UART_IRQ_SUM = 0,
+	/* ...or there are two separate IRQ for RX and TX */
+	UART_RX_IRQ = 0,
+	UART_TX_IRQ,
+	UART_IRQ_COUNT
+};
 
-static struct uart_port mvebu_uart_ports[MVEBU_NR_UARTS];
+/* Diverging register offsets */
+struct uart_regs_layout {
+	unsigned int rbr;
+	unsigned int tsh;
+	unsigned int ctrl;
+	unsigned int intr;
+};
+
+/* Diverging flags */
+struct uart_flags {
+	unsigned int ctrl_tx_rdy_int;
+	unsigned int ctrl_rx_rdy_int;
+	unsigned int stat_tx_rdy;
+	unsigned int stat_rx_rdy;
+};
+
+/* Driver data, a structure for each UART port */
+struct mvebu_uart_driver_data {
+	bool is_ext;
+	struct uart_regs_layout regs;
+	struct uart_flags flags;
+};
 
-struct mvebu_uart_data {
+/* MVEBU UART driver structure */
+struct mvebu_uart {
 	struct uart_port *port;
-	struct clk       *clk;
+	struct clk *clk;
+	int irq[UART_IRQ_COUNT];
+	unsigned char __iomem *nb;
+	struct mvebu_uart_driver_data *data;
 };
 
+static struct mvebu_uart *to_mvuart(struct uart_port *port)
+{
+	return (struct mvebu_uart *)port->private_data;
+}
+
+#define IS_EXTENDED(port) (to_mvuart(port)->data->is_ext)
+
+#define UART_RBR(port) (to_mvuart(port)->data->regs.rbr)
+#define UART_TSH(port) (to_mvuart(port)->data->regs.tsh)
+#define UART_CTRL(port) (to_mvuart(port)->data->regs.ctrl)
+#define UART_INTR(port) (to_mvuart(port)->data->regs.intr)
+
+#define CTRL_TX_RDY_INT(port) (to_mvuart(port)->data->flags.ctrl_tx_rdy_int)
+#define CTRL_RX_RDY_INT(port) (to_mvuart(port)->data->flags.ctrl_rx_rdy_int)
+#define STAT_TX_RDY(port) (to_mvuart(port)->data->flags.stat_tx_rdy)
+#define STAT_RX_RDY(port) (to_mvuart(port)->data->flags.stat_rx_rdy)
+
+static struct uart_port mvebu_uart_ports[MVEBU_NR_UARTS];
+
 /* Core UART Driver Operations */
 static unsigned int mvebu_uart_tx_empty(struct uart_port *port)
 {
@@ -127,26 +165,39 @@ static void mvebu_uart_set_mctrl(struct uart_port *port,
 
 static void mvebu_uart_stop_tx(struct uart_port *port)
 {
-	unsigned int ctl = readl(port->membase + UART_CTRL);
+	unsigned int ctl = readl(port->membase + UART_INTR(port));
 
-	ctl &= ~CTRL_TX_RDY_INT;
-	writel(ctl, port->membase + UART_CTRL);
+	ctl &= ~CTRL_TX_RDY_INT(port);
+	writel(ctl, port->membase + UART_INTR(port));
 }
 
 static void mvebu_uart_start_tx(struct uart_port *port)
 {
-	unsigned int ctl = readl(port->membase + UART_CTRL);
+	unsigned int ctl;
+	struct circ_buf *xmit = &port->state->xmit;
+
+	if (IS_EXTENDED(port) && !uart_circ_empty(xmit)) {
+		writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port));
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+		port->icount.tx++;
+	}
 
-	ctl |= CTRL_TX_RDY_INT;
-	writel(ctl, port->membase + UART_CTRL);
+	ctl = readl(port->membase + UART_INTR(port));
+	ctl |= CTRL_TX_RDY_INT(port);
+	writel(ctl, port->membase + UART_INTR(port));
 }
 
 static void mvebu_uart_stop_rx(struct uart_port *port)
 {
-	unsigned int ctl = readl(port->membase + UART_CTRL);
+	unsigned int ctl;
+
+	ctl = readl(port->membase + UART_CTRL(port));
+	ctl &= ~CTRL_BRK_INT;
+	writel(ctl, port->membase + UART_CTRL(port));
 
-	ctl &= ~CTRL_RX_INT;
-	writel(ctl, port->membase + UART_CTRL);
+	ctl = readl(port->membase + UART_INTR(port));
+	ctl &= ~CTRL_RX_RDY_INT(port);
+	writel(ctl, port->membase + UART_INTR(port));
 }
 
 static void mvebu_uart_break_ctl(struct uart_port *port, int brk)
@@ -155,12 +206,12 @@ static void mvebu_uart_break_ctl(struct uart_port *port, int brk)
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
-	ctl = readl(port->membase + UART_CTRL);
+	ctl = readl(port->membase + UART_CTRL(port));
 	if (brk == -1)
 		ctl |= CTRL_SND_BRK_SEQ;
 	else
 		ctl &= ~CTRL_SND_BRK_SEQ;
-	writel(ctl, port->membase + UART_CTRL);
+	writel(ctl, port->membase + UART_CTRL(port));
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
@@ -171,8 +222,8 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
 	char flag = 0;
 
 	do {
-		if (status & STAT_RX_RDY) {
-			ch = readl(port->membase + UART_RBR);
+		if (status & STAT_RX_RDY(port)) {
+			ch = readl(port->membase + UART_RBR(port));
 			ch &= 0xff;
 			flag = TTY_NORMAL;
 			port->icount.rx++;
@@ -198,7 +249,7 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
 			goto ignore_char;
 
 		if (status & port->ignore_status_mask & STAT_PAR_ERR)
-			status &= ~STAT_RX_RDY;
+			status &= ~STAT_RX_RDY(port);
 
 		status &= port->read_status_mask;
 
@@ -207,7 +258,7 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
 
 		status &= ~port->ignore_status_mask;
 
-		if (status & STAT_RX_RDY)
+		if (status & STAT_RX_RDY(port))
 			tty_insert_flip_char(tport, ch, flag);
 
 		if (status & STAT_BRK_DET)
@@ -221,7 +272,7 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
 
 ignore_char:
 		status = readl(port->membase + UART_STAT);
-	} while (status & (STAT_RX_RDY | STAT_BRK_DET));
+	} while (status & (STAT_RX_RDY(port) | STAT_BRK_DET));
 
 	tty_flip_buffer_push(tport);
 }
@@ -233,7 +284,7 @@ static void mvebu_uart_tx_chars(struct uart_port *port, unsigned int status)
 	unsigned int st;
 
 	if (port->x_char) {
-		writel(port->x_char, port->membase + UART_TSH);
+		writel(port->x_char, port->membase + UART_TSH(port));
 		port->icount.tx++;
 		port->x_char = 0;
 		return;
@@ -245,7 +296,7 @@ static void mvebu_uart_tx_chars(struct uart_port *port, unsigned int status)
 	}
 
 	for (count = 0; count < port->fifosize; count++) {
-		writel(xmit->buf[xmit->tail], port->membase + UART_TSH);
+		writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port));
 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 		port->icount.tx++;
 
@@ -269,10 +320,34 @@ static irqreturn_t mvebu_uart_isr(int irq, void *dev_id)
 	struct uart_port *port = (struct uart_port *)dev_id;
 	unsigned int st = readl(port->membase + UART_STAT);
 
-	if (st & (STAT_RX_RDY | STAT_OVR_ERR | STAT_FRM_ERR | STAT_BRK_DET))
+	if (st & (STAT_RX_RDY(port) | STAT_OVR_ERR | STAT_FRM_ERR |
+		  STAT_BRK_DET))
 		mvebu_uart_rx_chars(port, st);
 
-	if (st & STAT_TX_RDY)
+	if (st & STAT_TX_RDY(port))
+		mvebu_uart_tx_chars(port, st);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mvebu_uart_rx_isr(int irq, void *dev_id)
+{
+	struct uart_port *port = (struct uart_port *)dev_id;
+	unsigned int st = readl(port->membase + UART_STAT);
+
+	if (st & (STAT_RX_RDY(port) | STAT_OVR_ERR | STAT_FRM_ERR |
+			STAT_BRK_DET))
+		mvebu_uart_rx_chars(port, st);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mvebu_uart_tx_isr(int irq, void *dev_id)
+{
+	struct uart_port *port = (struct uart_port *)dev_id;
+	unsigned int st = readl(port->membase + UART_STAT);
+
+	if (st & STAT_TX_RDY(port))
 		mvebu_uart_tx_chars(port, st);
 
 	return IRQ_HANDLED;
@@ -280,18 +355,57 @@ static irqreturn_t mvebu_uart_isr(int irq, void *dev_id)
 
 static int mvebu_uart_startup(struct uart_port *port)
 {
+	struct mvebu_uart *mvuart = to_mvuart(port);
+	unsigned int ctl;
 	int ret;
 
 	writel(CTRL_TXFIFO_RST | CTRL_RXFIFO_RST,
-	       port->membase + UART_CTRL);
+	       port->membase + UART_CTRL(port));
 	udelay(1);
-	writel(CTRL_RX_INT, port->membase + UART_CTRL);
 
-	ret = request_irq(port->irq, mvebu_uart_isr, port->irqflags, "serial",
-			  port);
-	if (ret) {
-		dev_err(port->dev, "failed to request irq\n");
-		return ret;
+	/* Clear the error bits of state register before IRQ request */
+	ret = readl(port->membase + UART_STAT);
+	ret |= STAT_BRK_ERR;
+	writel(ret, port->membase + UART_STAT);
+
+	writel(CTRL_BRK_INT, port->membase + UART_CTRL(port));
+
+	ctl = readl(port->membase + UART_INTR(port));
+	ctl |= CTRL_RX_RDY_INT(port);
+	writel(ctl, port->membase + UART_INTR(port));
+
+	if (!mvuart->irq[UART_TX_IRQ]) {
+		/* Old bindings with just one interrupt (UART0 only) */
+		ret = devm_request_irq(port->dev, mvuart->irq[UART_IRQ_SUM],
+				       mvebu_uart_isr, port->irqflags,
+				       dev_name(port->dev), port);
+		if (ret) {
+			dev_err(port->dev, "unable to request IRQ %d\n",
+				mvuart->irq[UART_IRQ_SUM]);
+			return ret;
+		}
+	} else {
+		/* New bindings with an IRQ for RX and TX (both UART) */
+		ret = devm_request_irq(port->dev, mvuart->irq[UART_RX_IRQ],
+				       mvebu_uart_rx_isr, port->irqflags,
+				       dev_name(port->dev), port);
+		if (ret) {
+			dev_err(port->dev, "unable to request IRQ %d\n",
+				mvuart->irq[UART_RX_IRQ]);
+			return ret;
+		}
+
+		ret = devm_request_irq(port->dev, mvuart->irq[UART_TX_IRQ],
+				       mvebu_uart_tx_isr, port->irqflags,
+				       dev_name(port->dev),
+				       port);
+		if (ret) {
+			dev_err(port->dev, "unable to request IRQ %d\n",
+				mvuart->irq[UART_TX_IRQ]);
+			devm_free_irq(port->dev, mvuart->irq[UART_RX_IRQ],
+				      port);
+			return ret;
+		}
 	}
 
 	return 0;
@@ -299,9 +413,41 @@ static int mvebu_uart_startup(struct uart_port *port)
 
 static void mvebu_uart_shutdown(struct uart_port *port)
 {
-	writel(0, port->membase + UART_CTRL);
+	struct mvebu_uart *mvuart = to_mvuart(port);
+
+	writel(0, port->membase + UART_INTR(port));
+
+	if (!mvuart->irq[UART_TX_IRQ]) {
+		devm_free_irq(port->dev, mvuart->irq[UART_IRQ_SUM], port);
+	} else {
+		devm_free_irq(port->dev, mvuart->irq[UART_RX_IRQ], port);
+		devm_free_irq(port->dev, mvuart->irq[UART_TX_IRQ], port);
+	}
+}
+
+static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
+{
+	struct mvebu_uart *mvuart = to_mvuart(port);
+	unsigned int baud_rate_div;
+	u32 brdv;
+
+	if (IS_ERR(mvuart->clk))
+		return -PTR_ERR(mvuart->clk);
+
+	/*
+	 * The UART clock is divided by the value of the divisor to generate
+	 * UCLK_OUT clock, which is 16 times faster than the baudrate.
+	 * This prescaler can achieve all standard baudrates until 230400.
+	 * Higher baudrates could be achieved for the extended UART by using the
+	 * programmable oversampling stack (also called fractional divisor).
+	 */
+	baud_rate_div = DIV_ROUND_UP(port->uartclk, baud * 16);
+	brdv = readl(port->membase + UART_BRDV);
+	brdv &= ~BRDV_BAUD_MASK;
+	brdv |= baud_rate_div;
+	writel(brdv, port->membase + UART_BRDV);
 
-	free_irq(port->irq, port);
+	return 0;
 }
 
 static void mvebu_uart_set_termios(struct uart_port *port,
@@ -313,8 +459,8 @@ static void mvebu_uart_set_termios(struct uart_port *port,
 
 	spin_lock_irqsave(&port->lock, flags);
 
-	port->read_status_mask = STAT_RX_RDY | STAT_OVR_ERR |
-		STAT_TX_RDY | STAT_TX_FIFO_FUL;
+	port->read_status_mask = STAT_RX_RDY(port) | STAT_OVR_ERR |
+		STAT_TX_RDY(port) | STAT_TX_FIFO_FUL;
 
 	if (termios->c_iflag & INPCK)
 		port->read_status_mask |= STAT_FRM_ERR | STAT_PAR_ERR;
@@ -325,13 +471,32 @@ static void mvebu_uart_set_termios(struct uart_port *port,
 			STAT_FRM_ERR | STAT_PAR_ERR | STAT_OVR_ERR;
 
 	if ((termios->c_cflag & CREAD) == 0)
-		port->ignore_status_mask |= STAT_RX_RDY | STAT_BRK_ERR;
-
-	if (old)
-		tty_termios_copy_hw(termios, old);
+		port->ignore_status_mask |= STAT_RX_RDY(port) | STAT_BRK_ERR;
+
+	/*
+	 * Maximum achievable frequency with simple baudrate divisor is 230400.
+	 * Since the error per bit frame would be of more than 15%, achieving
+	 * higher frequencies would require to implement the fractional divisor
+	 * feature.
+	 */
+	baud = uart_get_baud_rate(port, termios, old, 0, 230400);
+	if (mvebu_uart_baud_rate_set(port, baud)) {
+		/* No clock available, baudrate cannot be changed */
+		if (old)
+			baud = uart_get_baud_rate(port, old, NULL, 0, 230400);
+	} else {
+		tty_termios_encode_baud_rate(termios, baud, baud);
+		uart_update_timeout(port, termios->c_cflag, baud);
+	}
 
-	baud = uart_get_baud_rate(port, termios, old, 0, 460800);
-	uart_update_timeout(port, termios->c_cflag, baud);
+	/* Only the following flag changes are supported */
+	if (old) {
+		termios->c_iflag &= INPCK | IGNPAR;
+		termios->c_iflag |= old->c_iflag & ~(INPCK | IGNPAR);
+		termios->c_cflag &= CREAD | CBAUD;
+		termios->c_cflag |= old->c_cflag & ~(CREAD | CBAUD);
+		termios->c_lflag = old->c_lflag;
+	}
 
 	spin_unlock_irqrestore(&port->lock, flags);
 }
@@ -356,10 +521,10 @@ static int mvebu_uart_get_poll_char(struct uart_port *port)
 {
 	unsigned int st = readl(port->membase + UART_STAT);
 
-	if (!(st & STAT_RX_RDY))
+	if (!(st & STAT_RX_RDY(port)))
 		return NO_POLL_CHAR;
 
-	return readl(port->membase + UART_RBR);
+	return readl(port->membase + UART_RBR(port));
 }
 
 static void mvebu_uart_put_poll_char(struct uart_port *port, unsigned char c)
@@ -375,7 +540,7 @@ static void mvebu_uart_put_poll_char(struct uart_port *port, unsigned char c)
 		udelay(1);
 	}
 
-	writel(c, port->membase + UART_TSH);
+	writel(c, port->membase + UART_TSH(port));
 }
 #endif
 
@@ -413,7 +578,8 @@ static void mvebu_uart_putc(struct uart_port *port, int c)
 			break;
 	}
 
-	writel(c, port->membase + UART_TSH);
+	/* At early stage, DT is not parsed yet, only use UART0 */
+	writel(c, port->membase + UART_STD_TSH);
 
 	for (;;) {
 		st = readl(port->membase + UART_STAT);
@@ -458,7 +624,7 @@ static void wait_for_xmitr(struct uart_port *port)
 static void mvebu_uart_console_putchar(struct uart_port *port, int ch)
 {
 	wait_for_xmitr(port);
-	writel(ch, port->membase + UART_TSH);
+	writel(ch, port->membase + UART_TSH(port));
 }
 
 static void mvebu_uart_console_write(struct console *co, const char *s,
@@ -466,7 +632,7 @@ static void mvebu_uart_console_write(struct console *co, const char *s,
 {
 	struct uart_port *port = &mvebu_uart_ports[co->index];
 	unsigned long flags;
-	unsigned int ier;
+	unsigned int ier, intr, ctl;
 	int locked = 1;
 
 	if (oops_in_progress)
@@ -474,16 +640,23 @@ static void mvebu_uart_console_write(struct console *co, const char *s,
 	else
 		spin_lock_irqsave(&port->lock, flags);
 
-	ier = readl(port->membase + UART_CTRL) &
-		(CTRL_RX_INT | CTRL_TX_RDY_INT);
-	writel(0, port->membase + UART_CTRL);
+	ier = readl(port->membase + UART_CTRL(port)) & CTRL_BRK_INT;
+	intr = readl(port->membase + UART_INTR(port)) &
+		(CTRL_RX_RDY_INT(port) | CTRL_TX_RDY_INT(port));
+	writel(0, port->membase + UART_CTRL(port));
+	writel(0, port->membase + UART_INTR(port));
 
 	uart_console_write(port, s, count, mvebu_uart_console_putchar);
 
 	wait_for_xmitr(port);
 
 	if (ier)
-		writel(ier, port->membase + UART_CTRL);
+		writel(ier, port->membase + UART_CTRL(port));
+
+	if (intr) {
+		ctl = intr | readl(port->membase + UART_INTR(port));
+		writel(ctl, port->membase + UART_INTR(port));
+	}
 
 	if (locked)
 		spin_unlock_irqrestore(&port->lock, flags);
@@ -538,7 +711,7 @@ console_initcall(mvebu_uart_console_init);
 
 static struct uart_driver mvebu_uart_driver = {
 	.owner			= THIS_MODULE,
-	.driver_name		= "mvebu_serial",
+	.driver_name		= DRIVER_NAME,
 	.dev_name		= "ttyMV",
 	.nr			= MVEBU_NR_UARTS,
 #ifdef CONFIG_SERIAL_MVEBU_CONSOLE
@@ -546,20 +719,39 @@ static struct uart_driver mvebu_uart_driver = {
 #endif
 };
 
+static const struct of_device_id mvebu_uart_of_match[];
+
+/* Counter to keep track of each UART port id when not using CONFIG_OF */
+static int uart_num_counter;
+
 static int mvebu_uart_probe(struct platform_device *pdev)
 {
 	struct resource *reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	const struct of_device_id *match = of_match_device(mvebu_uart_of_match,
+							   &pdev->dev);
 	struct uart_port *port;
-	struct mvebu_uart_data *data;
-	int ret;
+	struct mvebu_uart *mvuart;
+	int ret, id, irq;
+
+	if (!reg) {
+		dev_err(&pdev->dev, "no registers defined\n");
+		return -EINVAL;
+	}
+
+	/* Assume that all UART ports have a DT alias or none has */
+	id = of_alias_get_id(pdev->dev.of_node, "serial");
+	if (!pdev->dev.of_node || id < 0)
+		pdev->id = uart_num_counter++;
+	else
+		pdev->id = id;
 
-	if (!reg || !irq) {
-		dev_err(&pdev->dev, "no registers/irq defined\n");
+	if (pdev->id >= MVEBU_NR_UARTS) {
+		dev_err(&pdev->dev, "cannot have more than %d UART ports\n",
+			MVEBU_NR_UARTS);
 		return -EINVAL;
 	}
 
-	port = &mvebu_uart_ports[0];
+	port = &mvebu_uart_ports[pdev->id];
 
 	spin_lock_init(&port->lock);
 
@@ -571,9 +763,14 @@ static int mvebu_uart_probe(struct platform_device *pdev)
 	port->fifosize   = 32;
 	port->iotype     = UPIO_MEM32;
 	port->flags      = UPF_FIXED_PORT;
-	port->line       = 0; /* single port: force line number to  0 */
-
-	port->irq        = irq->start;
+	port->line       = pdev->id;
+
+	/*
+	 * IRQ number is not stored in this structure because we may have two of
+	 * them per port (RX and TX). Instead, use the driver UART structure
+	 * array so called ->irq[].
+	 */
+	port->irq        = 0;
 	port->irqflags   = 0;
 	port->mapbase    = reg->start;
 
@@ -581,15 +778,70 @@ static int mvebu_uart_probe(struct platform_device *pdev)
 	if (IS_ERR(port->membase))
 		return -PTR_ERR(port->membase);
 
-	data = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_uart_data),
-			    GFP_KERNEL);
-	if (!data)
+	mvuart = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_uart),
+			      GFP_KERNEL);
+	if (!mvuart)
 		return -ENOMEM;
 
-	data->port = port;
+	/* Get controller data depending on the compatible string */
+	mvuart->data = (struct mvebu_uart_driver_data *)match->data;
+	mvuart->port = port;
+
+	port->private_data = mvuart;
+	platform_set_drvdata(pdev, mvuart);
+
+	/* Get fixed clock frequency */
+	mvuart->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(mvuart->clk)) {
+		if (PTR_ERR(mvuart->clk) == -EPROBE_DEFER)
+			return PTR_ERR(mvuart->clk);
+
+		if (IS_EXTENDED(port)) {
+			dev_err(&pdev->dev, "unable to get UART clock\n");
+			return PTR_ERR(mvuart->clk);
+		}
+	} else {
+		if (!clk_prepare_enable(mvuart->clk))
+			port->uartclk = clk_get_rate(mvuart->clk);
+	}
+
+	/* Manage interrupts */
+	if (platform_irq_count(pdev) == 1) {
+		/* Old bindings: no name on the single unamed UART0 IRQ */
+		irq = platform_get_irq(pdev, 0);
+		if (irq < 0) {
+			dev_err(&pdev->dev, "unable to get UART IRQ\n");
+			return irq;
+		}
+
+		mvuart->irq[UART_IRQ_SUM] = irq;
+	} else {
+		/*
+		 * New bindings: named interrupts (RX, TX) for both UARTS,
+		 * only make use of uart-rx and uart-tx interrupts, do not use
+		 * uart-sum of UART0 port.
+		 */
+		irq = platform_get_irq_byname(pdev, "uart-rx");
+		if (irq < 0) {
+			dev_err(&pdev->dev, "unable to get 'uart-rx' IRQ\n");
+			return irq;
+		}
+
+		mvuart->irq[UART_RX_IRQ] = irq;
 
-	port->private_data = data;
-	platform_set_drvdata(pdev, data);
+		irq = platform_get_irq_byname(pdev, "uart-tx");
+		if (irq < 0) {
+			dev_err(&pdev->dev, "unable to get 'uart-tx' IRQ\n");
+			return irq;
+		}
+
+		mvuart->irq[UART_TX_IRQ] = irq;
+	}
+
+	/* UART Soft Reset*/
+	writel(CTRL_SOFT_RST, port->membase + UART_CTRL(port));
+	udelay(1);
+	writel(0, port->membase + UART_CTRL(port));
 
 	ret = uart_add_one_port(&mvebu_uart_driver, port);
 	if (ret)
@@ -597,9 +849,40 @@ static int mvebu_uart_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static struct mvebu_uart_driver_data uart_std_driver_data = {
+	.is_ext = false,
+	.regs.rbr = UART_STD_RBR,
+	.regs.tsh = UART_STD_TSH,
+	.regs.ctrl = UART_STD_CTRL1,
+	.regs.intr = UART_STD_CTRL2,
+	.flags.ctrl_tx_rdy_int = CTRL_STD_TX_RDY_INT,
+	.flags.ctrl_rx_rdy_int = CTRL_STD_RX_RDY_INT,
+	.flags.stat_tx_rdy = STAT_STD_TX_RDY,
+	.flags.stat_rx_rdy = STAT_STD_RX_RDY,
+};
+
+static struct mvebu_uart_driver_data uart_ext_driver_data = {
+	.is_ext = true,
+	.regs.rbr = UART_EXT_RBR,
+	.regs.tsh = UART_EXT_TSH,
+	.regs.ctrl = UART_EXT_CTRL1,
+	.regs.intr = UART_EXT_CTRL2,
+	.flags.ctrl_tx_rdy_int = CTRL_EXT_TX_RDY_INT,
+	.flags.ctrl_rx_rdy_int = CTRL_EXT_RX_RDY_INT,
+	.flags.stat_tx_rdy = STAT_EXT_TX_RDY,
+	.flags.stat_rx_rdy = STAT_EXT_RX_RDY,
+};
+
 /* Match table for of_platform binding */
 static const struct of_device_id mvebu_uart_of_match[] = {
-	{ .compatible = "marvell,armada-3700-uart", },
+	{
+		.compatible = "marvell,armada-3700-uart",
+		.data = (void *)&uart_std_driver_data,
+	},
+	{
+		.compatible = "marvell,armada-3700-uart-ext",
+		.data = (void *)&uart_ext_driver_data,
+	},
 	{}
 };
 
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index be94246b6fcc..efb4fd3784ed 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Application UART driver for:
  *	Freescale STMP37XX/STMP378X
@@ -9,10 +10,6 @@
  *	Provide Alphascale ASM9260 support.
  * Copyright 2008-2010 Freescale Semiconductor, Inc.
  * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
- *
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
  */
 
 #if defined(CONFIG_SERIAL_MXS_AUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/netx-serial.c b/drivers/tty/serial/netx-serial.c
index 207a0a032ed1..b3556863491f 100644
--- a/drivers/tty/serial/netx-serial.c
+++ b/drivers/tty/serial/netx-serial.c
@@ -1,18 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #if defined(CONFIG_SERIAL_NETX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 7754053deeda..53d59e9b944a 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for OMAP-UART controller.
  * Based on drivers/serial/8250.c
@@ -8,11 +9,6 @@
  *	Govindraj R	<govindraj.raja@ti.com>
  *	Thara Gopinath	<thara@ti.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  * Note: This driver is made separate from 8250 driver as we cannot
  * over load 8250 driver with omap platform specific configuration for
  * features like DMA, it makes easier to implement features like DMA and
@@ -610,7 +606,7 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
 		default:
 			break;
 		}
-	} while (!(iir & UART_IIR_NO_INT) && max_count--);
+	} while (max_count--);
 
 	spin_unlock(&up->port.lock);
 
@@ -693,7 +689,7 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl)
 	if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
 		up->efr |= UART_EFR_RTS;
 	else
-		up->efr &= UART_EFR_RTS;
+		up->efr &= ~UART_EFR_RTS;
 	serial_out(up, UART_EFR, up->efr);
 	serial_out(up, UART_LCR, lcr);
 
@@ -1606,7 +1602,6 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up,
 				   struct device_node *np)
 {
 	struct serial_rs485 *rs485conf = &up->port.rs485;
-	u32 rs485_delay[2];
 	enum of_gpio_flags flags;
 	int ret;
 
@@ -1637,17 +1632,7 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up,
 		up->rts_gpio = -EINVAL;
 	}
 
-	if (of_property_read_u32_array(np, "rs485-rts-delay",
-				    rs485_delay, 2) == 0) {
-		rs485conf->delay_rts_before_send = rs485_delay[0];
-		rs485conf->delay_rts_after_send = rs485_delay[1];
-	}
-
-	if (of_property_read_bool(np, "rs485-rx-during-tx"))
-		rs485conf->flags |= SER_RS485_RX_DURING_TX;
-
-	if (of_property_read_bool(np, "linux,rs485-enabled-at-boot-time"))
-		rs485conf->flags |= SER_RS485_ENABLED;
+	of_get_rs485_mode(np, rs485conf);
 
 	return 0;
 }
diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c
index b9c859365334..29a6dc6a8d23 100644
--- a/drivers/tty/serial/owl-uart.c
+++ b/drivers/tty/serial/owl-uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Actions Semi Owl family serial console
  *
@@ -5,19 +6,6 @@
  * Author: Actions Semi, Inc.
  *
  * Copyright (c) 2016-2017 Andreas Färber
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index d9123f995705..760d5dd0aada 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1,18 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
- *
- *This program is free software; you can redistribute it and/or modify
- *it under the terms of the GNU General Public License as published by
- *the Free Software Foundation; version 2 of the License.
- *
- *This program is distributed in the hope that it will be useful,
- *but WITHOUT ANY WARRANTY; without even the implied warranty of
- *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *GNU General Public License for more details.
- *
- *You should have received a copy of the GNU General Public License
- *along with this program; if not, write to the Free Software
- *Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
  */
 #if defined(CONFIG_SERIAL_PCH_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #define SUPPORT_SYSRQ
diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index 00a33eb859d3..fd80d999308d 100644
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * PIC32 Integrated Serial Driver.
  *
@@ -5,8 +6,6 @@
  *
  * Authors:
  *   Sorin-Andrei Pistirica <andrei.pistirica@microchip.com>
- *
- * Licensed under GPLv2 or later.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/tty/serial/pic32_uart.h b/drivers/tty/serial/pic32_uart.h
index ec379da55ebb..2f2b56927dc6 100644
--- a/drivers/tty/serial/pic32_uart.h
+++ b/drivers/tty/serial/pic32_uart.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * PIC32 Integrated Serial Driver.
  *
@@ -5,8 +6,6 @@
  *
  * Authors:
  *   Sorin-Andrei Pistirica <andrei.pistirica@microchip.com>
- *
- * Licensed under GPLv2 or later.
  */
 #ifndef __DT_PIC32_UART_H__
 #define __DT_PIC32_UART_H__
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index 6ccdd018fb45..3d21790d961e 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for PowerMac Z85c30 based ESCC cell found in the
  * "macio" ASICs of various PowerMac models
@@ -13,20 +14,6 @@
  * and once done, I expect that driver to remain fairly stable in
  * the long term, unless we change the driver model again...
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * 2004-08-06 Harald Welte <laforge@gnumonks.org>
  *	- Enable BREAK interrupt
  *	- Add support for sysreq
diff --git a/drivers/tty/serial/pnx8xxx_uart.c b/drivers/tty/serial/pnx8xxx_uart.c
index dab2668d3879..f8812389b8a8 100644
--- a/drivers/tty/serial/pnx8xxx_uart.c
+++ b/drivers/tty/serial/pnx8xxx_uart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * UART driver for PNX8XXX SoCs
  *
@@ -7,11 +8,6 @@
  *
  * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  * Copyright (C) 2000 Deep Blue Solutions Ltd.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of
- * any kind, whether express or implied.
- *
  */
 
 #if defined(CONFIG_SERIAL_PNX8XXX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -666,9 +662,8 @@ static void __init pnx8xxx_init_ports(void)
 	first = 0;
 
 	for (i = 0; i < NR_PORTS; i++) {
-		init_timer(&pnx8xxx_ports[i].timer);
-		pnx8xxx_ports[i].timer.function = pnx8xxx_timeout;
-		pnx8xxx_ports[i].timer.data     = (unsigned long)&pnx8xxx_ports[i];
+		setup_timer(&pnx8xxx_ports[i].timer, pnx8xxx_timeout,
+			    (unsigned long)&pnx8xxx_ports[i]);
 		pnx8xxx_ports[i].port.ops = &pnx8xxx_pops;
 	}
 }
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 905631df1f8b..baf552944d56 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Based on drivers/serial/8250.c by Russell King.
  *
@@ -5,11 +6,6 @@
  *  Created:	Feb 20, 2003
  *  Copyright:	(C) 2003 Monta Vista Software, Inc.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  * Note 1: This driver is made separate from the already too overloaded
  * 8250.c because it needs some kirks of its own and that'll make it
  * easier to add DMA support.
diff --git a/drivers/tty/serial/rp2.c b/drivers/tty/serial/rp2.c
index 056f91b3a4ca..520b43b23543 100644
--- a/drivers/tty/serial/rp2.c
+++ b/drivers/tty/serial/rp2.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for Comtrol RocketPort EXPRESS/INFINITY cards
  *
@@ -10,10 +11,6 @@
  *
  *   rocketport_infinity_express-linux-1.20.tar.gz
  *     Copyright (C) 2004-2011 Comtrol, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
  */
 
 #include <linux/bitops.h>
diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
index fd3d1329d48c..4e3f169b30cf 100644
--- a/drivers/tty/serial/sa1100.c
+++ b/drivers/tty/serial/sa1100.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for SA11x0 serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
  *
  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -640,9 +627,8 @@ static void __init sa1100_init_ports(void)
 		sa1100_ports[i].port.fifosize  = 8;
 		sa1100_ports[i].port.line      = i;
 		sa1100_ports[i].port.iotype    = UPIO_MEM;
-		init_timer(&sa1100_ports[i].timer);
-		sa1100_ports[i].timer.function = sa1100_timeout;
-		sa1100_ports[i].timer.data     = (unsigned long)&sa1100_ports[i];
+		setup_timer(&sa1100_ports[i].timer, sa1100_timeout,
+			    (unsigned long)&sa1100_ports[i]);
 	}
 
 	/*
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 8aca18c4cdea..f9fecc5ed0ce 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver core for Samsung SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
  *	http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
 */
 
 /* Hote on 2410 error handling
diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h
index 965199b6c16f..f93022113f59 100644
--- a/drivers/tty/serial/samsung.h
+++ b/drivers/tty/serial/samsung.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #ifndef __SAMSUNG_H
 #define __SAMSUNG_H
 
@@ -6,10 +7,6 @@
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
  *	http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
 */
 
 #include <linux/dmaengine.h>
diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index 041625cc24bb..329aced26bd8 100644
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *	Support for the asynchronous serial interface (DUART) included
  *	in the BCM1250 and derived System-On-a-Chip (SOC) devices.
@@ -9,11 +10,6 @@
  *
  *	Copyright (c) 2000, 2001, 2002, 2003, 2004  Broadcom Corporation
  *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License
- *	as published by the Free Software Foundation; either version
- *	2 of the License, or (at your option) any later version.
- *
  *	References:
  *
  *	"BCM1250/BCM1125/BCM1125H User Manual", Broadcom Corporation
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index ca54ce074a5f..65792a3539d0 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1,14 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * SC16IS7xx tty serial driver - Copyright (C) 2014 GridPoint
  * Author: Jon Ringle <jringle@gridpoint.com>
  *
  *  Based on max310x.c, by Alexander Shiyan <shc_work@mail.ru>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c
index b9c7a904c1ea..d6ae3086c2a2 100644
--- a/drivers/tty/serial/sccnxp.c
+++ b/drivers/tty/serial/sccnxp.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  NXP (Philips) SCC+++(SCN+++) serial driver
  *
  *  Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru>
  *
  *  Based on sc26xx.c, by Thomas Bogendörfer (tsbogend@alpha.franken.de)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #if defined(CONFIG_SERIAL_SCCNXP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -465,9 +461,9 @@ static void sccnxp_handle_events(struct sccnxp_port *s)
 	} while (1);
 }
 
-static void sccnxp_timer(unsigned long data)
+static void sccnxp_timer(struct timer_list *t)
 {
-	struct sccnxp_port *s = (struct sccnxp_port *)data;
+	struct sccnxp_port *s = from_timer(s, t, timer);
 	unsigned long flags;
 
 	spin_lock_irqsave(&s->lock, flags);
@@ -987,8 +983,7 @@ static int sccnxp_probe(struct platform_device *pdev)
 
 		dev_err(&pdev->dev, "Unable to reguest IRQ %i\n", s->irq);
 	} else {
-		init_timer(&s->timer);
-		setup_timer(&s->timer, sccnxp_timer, (unsigned long)s);
+		timer_setup(&s->timer, sccnxp_timer, 0);
 		mod_timer(&s->timer, jiffies +
 			  usecs_to_jiffies(s->pdata.poll_time_us));
 		return 0;
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index cf9b736f26f8..af2a29cfbbe9 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * serial_tegra.c
  *
@@ -6,18 +7,6 @@
  * Copyright (c) 2012-2013, NVIDIA CORPORATION.  All rights reserved.
  *
  * Author: Laxman Dewangan <ldewangan@nvidia.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 3a14cccbd7ff..854995e1cae7 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver core for serial ports
  *
@@ -5,20 +6,6 @@
  *
  *  Copyright 1999 ARM Limited
  *  Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #include <linux/module.h>
 #include <linux/tty.h>
@@ -1482,10 +1469,10 @@ out:
 static void uart_close(struct tty_struct *tty, struct file *filp)
 {
 	struct uart_state *state = tty->driver_data;
-	struct tty_port *port;
 
 	if (!state) {
 		struct uart_driver *drv = tty->driver->driver_state;
+		struct tty_port *port;
 
 		state = drv->state + tty->index;
 		port = &state->port;
@@ -1495,7 +1482,6 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
 		return;
 	}
 
-	port = &state->port;
 	pr_debug("uart_close(%d) called\n", tty->index);
 
 	tty_port_close(tty->port, tty, filp);
@@ -3026,5 +3012,41 @@ EXPORT_SYMBOL(uart_resume_port);
 EXPORT_SYMBOL(uart_add_one_port);
 EXPORT_SYMBOL(uart_remove_one_port);
 
+/**
+ * of_get_rs485_mode() - Implement parsing rs485 properties
+ * @np: uart node
+ * @rs485conf: output parameter
+ *
+ * This function implements the device tree binding described in
+ * Documentation/devicetree/bindings/serial/rs485.txt.
+ */
+void of_get_rs485_mode(struct device_node *np, struct serial_rs485 *rs485conf)
+{
+	u32 rs485_delay[2];
+	int ret;
+
+	ret = of_property_read_u32_array(np, "rs485-rts-delay", rs485_delay, 2);
+	if (!ret) {
+		rs485conf->delay_rts_before_send = rs485_delay[0];
+		rs485conf->delay_rts_after_send = rs485_delay[1];
+	} else {
+		rs485conf->delay_rts_before_send = 0;
+		rs485conf->delay_rts_after_send = 0;
+	}
+
+	/*
+	 * clear full-duplex and enabled flags to get to a defined state with
+	 * the two following properties.
+	 */
+	rs485conf->flags &= ~(SER_RS485_RX_DURING_TX | SER_RS485_ENABLED);
+
+	if (of_property_read_bool(np, "rs485-rx-during-tx"))
+		rs485conf->flags |= SER_RS485_RX_DURING_TX;
+
+	if (of_property_read_bool(np, "linux,rs485-enabled-at-boot-time"))
+		rs485conf->flags |= SER_RS485_ENABLED;
+}
+EXPORT_SYMBOL_GPL(of_get_rs485_mode);
+
 MODULE_DESCRIPTION("Serial driver core");
 MODULE_LICENSE("GPL");
diff --git a/drivers/tty/serial/serial_ks8695.c b/drivers/tty/serial/serial_ks8695.c
index 57f152394af5..b461d791188c 100644
--- a/drivers/tty/serial/serial_ks8695.c
+++ b/drivers/tty/serial/serial_ks8695.c
@@ -1,15 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for KS8695 serial ports
  *
  *  Based on drivers/serial/serial_amba.c, by Kam Lee.
  *
  *  Copyright 2002-2005 Micrel Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  */
 #include <linux/module.h>
 #include <linux/tty.h>
diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
index d2da6aa7f27d..1c06325beaca 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.c
+++ b/drivers/tty/serial/serial_mctrl_gpio.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Helpers for controlling modem lines via GPIO
  *
  * Copyright (C) 2014 Paratronic S.A.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/err.h>
diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index fa000bcff217..b7d3cca48ede 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -1,18 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Helpers for controlling modem lines via GPIO
  *
  * Copyright (C) 2014 Paratronic S.A.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 #ifndef __SERIAL_MCTRL_GPIO__
diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
index f80fead6c5fc..1b4008d022bf 100644
--- a/drivers/tty/serial/serial_txx9.c
+++ b/drivers/tty/serial/serial_txx9.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Derived from many drivers using generic_serial interface,
  * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
@@ -8,10 +9,6 @@
  *  Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
  *  Copyright (C) 2000-2002 Toshiba Corporation
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
  */
 
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 784dd42002ea..31fcc7072a90 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * SuperH on-chip serial module support.  (SCI with no FIFO / with FIFO)
  *
@@ -13,10 +14,6 @@
  *   Modified to support SecureEdge. David McCullough (2002)
  *   Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003).
  *   Removed SH7300 support (Jul 2007).
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
  */
 #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #define SUPPORT_SYSRQ
@@ -40,6 +37,7 @@
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/scatterlist.h>
@@ -152,6 +150,7 @@ struct sci_port {
 	int				rx_trigger;
 	struct timer_list		rx_fifo_timer;
 	int				rx_fifo_timeout;
+	u16				hscif_tot;
 
 	bool has_rtscts;
 	bool autorts;
@@ -1107,8 +1106,14 @@ static ssize_t rx_fifo_timeout_show(struct device *dev,
 {
 	struct uart_port *port = dev_get_drvdata(dev);
 	struct sci_port *sci = to_sci_port(port);
+	int v;
+
+	if (port->type == PORT_HSCIF)
+		v = sci->hscif_tot >> HSSCR_TOT_SHIFT;
+	else
+		v = sci->rx_fifo_timeout;
 
-	return sprintf(buf, "%d\n", sci->rx_fifo_timeout);
+	return sprintf(buf, "%d\n", v);
 }
 
 static ssize_t rx_fifo_timeout_store(struct device *dev,
@@ -1124,11 +1129,19 @@ static ssize_t rx_fifo_timeout_store(struct device *dev,
 	ret = kstrtol(buf, 0, &r);
 	if (ret)
 		return ret;
-	sci->rx_fifo_timeout = r;
-	scif_set_rtrg(port, 1);
-	if (r > 0)
-		setup_timer(&sci->rx_fifo_timer, rx_fifo_timer_fn,
-			    (unsigned long)sci);
+
+	if (port->type == PORT_HSCIF) {
+		if (r < 0 || r > 3)
+			return -EINVAL;
+		sci->hscif_tot = r << HSSCR_TOT_SHIFT;
+	} else {
+		sci->rx_fifo_timeout = r;
+		scif_set_rtrg(port, 1);
+		if (r > 0)
+			setup_timer(&sci->rx_fifo_timer, rx_fifo_timer_fn,
+				    (unsigned long)sci);
+	}
+
 	return count;
 }
 
@@ -1210,8 +1223,11 @@ static void sci_rx_dma_release(struct sci_port *s, bool enable_pio)
 	dma_free_coherent(chan->device->dev, s->buf_len_rx * 2, s->rx_buf[0],
 			  sg_dma_address(&s->sg_rx[0]));
 	dma_release_channel(chan);
-	if (enable_pio)
+	if (enable_pio) {
+		spin_lock_irqsave(&port->lock, flags);
 		sci_start_rx(port);
+		spin_unlock_irqrestore(&port->lock, flags);
+	}
 }
 
 static void sci_dma_rx_complete(void *arg)
@@ -1278,8 +1294,11 @@ static void sci_tx_dma_release(struct sci_port *s, bool enable_pio)
 	dma_unmap_single(chan->device->dev, s->tx_dma_addr, UART_XMIT_SIZE,
 			 DMA_TO_DEVICE);
 	dma_release_channel(chan);
-	if (enable_pio)
+	if (enable_pio) {
+		spin_lock_irqsave(&port->lock, flags);
 		sci_start_tx(port);
+		spin_unlock_irqrestore(&port->lock, flags);
+	}
 }
 
 static void sci_submit_rx(struct sci_port *s)
@@ -1491,6 +1510,14 @@ static void sci_request_dma(struct uart_port *port)
 		return;
 
 	s->cookie_tx = -EINVAL;
+
+	/*
+	 * Don't request a dma channel if no channel was specified
+	 * in the device tree.
+	 */
+	if (!of_find_property(port->dev->of_node, "dmas", NULL))
+		return;
+
 	chan = sci_request_dma_chan(port, DMA_MEM_TO_DEV);
 	dev_dbg(port->dev, "%s: TX: got channel %p\n", __func__, chan);
 	if (chan) {
@@ -1980,6 +2007,7 @@ static void sci_enable_ms(struct uart_port *port)
 static void sci_break_ctl(struct uart_port *port, int break_state)
 {
 	unsigned short scscr, scsptr;
+	unsigned long flags;
 
 	/* check wheter the port has SCSPTR */
 	if (!sci_getreg(port, SCSPTR)->size) {
@@ -1990,6 +2018,7 @@ static void sci_break_ctl(struct uart_port *port, int break_state)
 		return;
 	}
 
+	spin_lock_irqsave(&port->lock, flags);
 	scsptr = serial_port_in(port, SCSPTR);
 	scscr = serial_port_in(port, SCSCR);
 
@@ -2003,6 +2032,7 @@ static void sci_break_ctl(struct uart_port *port, int break_state)
 
 	serial_port_out(port, SCSPTR, scsptr);
 	serial_port_out(port, SCSCR, scscr);
+	spin_unlock_irqrestore(&port->lock, flags);
 }
 
 static int sci_startup(struct uart_port *port)
@@ -2037,9 +2067,13 @@ static void sci_shutdown(struct uart_port *port)
 	spin_lock_irqsave(&port->lock, flags);
 	sci_stop_rx(port);
 	sci_stop_tx(port);
-	/* Stop RX and TX, disable related interrupts, keep clock source */
+	/*
+	 * Stop RX and TX, disable related interrupts, keep clock source
+	 * and HSCIF TOT bits
+	 */
 	scr = serial_port_in(port, SCSCR);
-	serial_port_out(port, SCSCR, scr & (SCSCR_CKE1 | SCSCR_CKE0));
+	serial_port_out(port, SCSCR, scr &
+			(SCSCR_CKE1 | SCSCR_CKE0 | s->hscif_tot));
 	spin_unlock_irqrestore(&port->lock, flags);
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
@@ -2186,7 +2220,7 @@ static void sci_reset(struct uart_port *port)
 	unsigned int status;
 	struct sci_port *s = to_sci_port(port);
 
-	serial_port_out(port, SCSCR, 0x00);	/* TE=0, RE=0, CKE1=0 */
+	serial_port_out(port, SCSCR, s->hscif_tot);	/* TE=0, RE=0, CKE1=0 */
 
 	reg = sci_getreg(port, SCFCR);
 	if (reg->size)
@@ -2227,6 +2261,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 	int min_err = INT_MAX, err;
 	unsigned long max_freq = 0;
 	int best_clk = -1;
+	unsigned long flags;
 
 	if ((termios->c_cflag & CSIZE) == CS7)
 		smr_val |= SCSMR_CHR;
@@ -2336,6 +2371,8 @@ done:
 		serial_port_out(port, SCCKS, sccks);
 	}
 
+	spin_lock_irqsave(&port->lock, flags);
+
 	sci_reset(port);
 
 	uart_update_timeout(port, termios->c_cflag, baud);
@@ -2353,10 +2390,7 @@ done:
 			case 27: smr_val |= SCSMR_SRC_27; break;
 			}
 		smr_val |= cks;
-		dev_dbg(port->dev,
-			 "SCR 0x%x SMR 0x%x BRR %u CKS 0x%x DL %u SRR %u\n",
-			 scr_val, smr_val, brr, sccks, dl, srr);
-		serial_port_out(port, SCSCR, scr_val);
+		serial_port_out(port, SCSCR, scr_val | s->hscif_tot);
 		serial_port_out(port, SCSMR, smr_val);
 		serial_port_out(port, SCBRR, brr);
 		if (sci_getreg(port, HSSRR)->size)
@@ -2369,8 +2403,7 @@ done:
 		scr_val = s->cfg->scscr & (SCSCR_CKE1 | SCSCR_CKE0);
 		smr_val |= serial_port_in(port, SCSMR) &
 			   (SCSMR_CKEDG | SCSMR_SRC_MASK | SCSMR_CKS);
-		dev_dbg(port->dev, "SCR 0x%x SMR 0x%x\n", scr_val, smr_val);
-		serial_port_out(port, SCSCR, scr_val);
+		serial_port_out(port, SCSCR, scr_val | s->hscif_tot);
 		serial_port_out(port, SCSMR, smr_val);
 	}
 
@@ -2406,8 +2439,7 @@ done:
 
 	scr_val |= SCSCR_RE | SCSCR_TE |
 		   (s->cfg->scscr & ~(SCSCR_CKE1 | SCSCR_CKE0));
-	dev_dbg(port->dev, "SCSCR 0x%x\n", scr_val);
-	serial_port_out(port, SCSCR, scr_val);
+	serial_port_out(port, SCSCR, scr_val | s->hscif_tot);
 	if ((srr + 1 == 5) &&
 	    (port->type == PORT_SCIFA || port->type == PORT_SCIFB)) {
 		/*
@@ -2453,8 +2485,6 @@ done:
 	s->rx_frame = (100 * bits * HZ) / (baud / 10);
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
 	s->rx_timeout = DIV_ROUND_UP(s->buf_len_rx * 2 * s->rx_frame, 1000);
-	dev_dbg(port->dev, "DMA Rx t-out %ums, tty t-out %u jiffies\n",
-		s->rx_timeout * 1000 / HZ, port->timeout);
 	if (s->rx_timeout < msecs_to_jiffies(20))
 		s->rx_timeout = msecs_to_jiffies(20);
 #endif
@@ -2462,6 +2492,8 @@ done:
 	if ((termios->c_cflag & CREAD) != 0)
 		sci_start_rx(port);
 
+	spin_unlock_irqrestore(&port->lock, flags);
+
 	sci_port_disable(s);
 
 	if (UART_ENABLE_MS(port, termios->c_cflag))
@@ -2773,6 +2805,7 @@ static int sci_init_single(struct platform_device *dev,
 	}
 
 	sci_port->rx_fifo_timeout = 0;
+	sci_port->hscif_tot = 0;
 
 	/* SCIFA on sh7723 and sh7724 need a custom sampling rate that doesn't
 	 * match the SoC datasheet, this should be investigated. Let platform
@@ -2860,7 +2893,7 @@ static void serial_console_write(struct console *co, const char *s,
 	ctrl_temp = SCSCR_RE | SCSCR_TE |
 		    (sci_port->cfg->scscr & ~(SCSCR_CKE1 | SCSCR_CKE0)) |
 		    (ctrl & (SCSCR_CKE1 | SCSCR_CKE0));
-	serial_port_out(port, SCSCR, ctrl_temp);
+	serial_port_out(port, SCSCR, ctrl_temp | sci_port->hscif_tot);
 
 	uart_console_write(port, s, count, serial_console_putchar);
 
@@ -2988,7 +3021,8 @@ static int sci_remove(struct platform_device *dev)
 		sysfs_remove_file(&dev->dev.kobj,
 				  &dev_attr_rx_fifo_trigger.attr);
 	}
-	if (port->port.type == PORT_SCIFA || port->port.type == PORT_SCIFB) {
+	if (port->port.type == PORT_SCIFA || port->port.type == PORT_SCIFB ||
+	    port->port.type == PORT_HSCIF) {
 		sysfs_remove_file(&dev->dev.kobj,
 				  &dev_attr_rx_fifo_timeout.attr);
 	}
@@ -3044,17 +3078,15 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
 					  unsigned int *dev_id)
 {
 	struct device_node *np = pdev->dev.of_node;
-	const struct of_device_id *match;
 	struct plat_sci_port *p;
 	struct sci_port *sp;
+	const void *data;
 	int id;
 
 	if (!IS_ENABLED(CONFIG_OF) || !np)
 		return NULL;
 
-	match = of_match_node(of_sci_match, np);
-	if (!match)
-		return NULL;
+	data = of_device_get_match_data(&pdev->dev);
 
 	p = devm_kzalloc(&pdev->dev, sizeof(struct plat_sci_port), GFP_KERNEL);
 	if (!p)
@@ -3070,8 +3102,8 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
 	sp = &sci_ports[id];
 	*dev_id = id;
 
-	p->type = SCI_OF_TYPE(match->data);
-	p->regtype = SCI_OF_REGTYPE(match->data);
+	p->type = SCI_OF_TYPE(data);
+	p->regtype = SCI_OF_REGTYPE(data);
 
 	sp->has_rtscts = of_property_read_bool(np, "uart-has-rtscts");
 
@@ -3173,7 +3205,8 @@ static int sci_probe(struct platform_device *dev)
 		if (ret)
 			return ret;
 	}
-	if (sp->port.type == PORT_SCIFA || sp->port.type ==  PORT_SCIFB) {
+	if (sp->port.type == PORT_SCIFA || sp->port.type == PORT_SCIFB ||
+	    sp->port.type == PORT_HSCIF) {
 		ret = sysfs_create_file(&dev->dev.kobj,
 				&dev_attr_rx_fifo_timeout.attr);
 		if (ret) {
@@ -3244,7 +3277,7 @@ early_platform_init_buffer("earlyprintk", &sci_driver,
 			   early_serial_buf, ARRAY_SIZE(early_serial_buf));
 #endif
 #ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
-static struct __init plat_sci_port port_cfg;
+static struct plat_sci_port port_cfg __initdata;
 
 static int __init early_console_setup(struct earlycon_device *device,
 				      int type)
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index 938e23a2d166..a5f792fd48d9 100644
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -63,6 +63,9 @@ enum {
 #define SCSCR_TDRQE	BIT(15)	/* Tx Data Transfer Request Enable */
 #define SCSCR_RDRQE	BIT(14)	/* Rx Data Transfer Request Enable */
 
+/* Serial Control Register, HSCIF-only bits */
+#define HSSCR_TOT_SHIFT	14
+
 /* SCxSR (Serial Status Register) on SCI */
 #define SCI_TDRE	BIT(7)	/* Transmit Data Register Empty */
 #define SCI_RDRF	BIT(6)	/* Receive Data Register Full */
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
index 684cb8dd8050..9925b00a9777 100644
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ b/drivers/tty/serial/sirfsoc_uart.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for CSR SiRFprimaII onboard UARTs.
  *
  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- *
- * Licensed under GPLv2 or later.
  */
 
 #include <linux/module.h>
diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h
index 43756bd9111c..004ca684d3ae 100644
--- a/drivers/tty/serial/sirfsoc_uart.h
+++ b/drivers/tty/serial/sirfsoc_uart.h
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Drivers for CSR SiRFprimaII onboard UARTs.
  *
  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- *
- * Licensed under GPLv2 or later.
  */
 #include <linux/bitops.h>
 #include <linux/log2.h>
diff --git a/drivers/tty/serial/sn_console.c b/drivers/tty/serial/sn_console.c
index 9e0e6586c698..ed78542c4c37 100644
--- a/drivers/tty/serial/sn_console.c
+++ b/drivers/tty/serial/sn_console.c
@@ -8,25 +8,6 @@
  *
  * Copyright (c) 2004-2006 Silicon Graphics, Inc.  All Rights Reserved.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like.  Any license provided herein, whether implied or
- * otherwise, applies only to this software file.  Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
  * Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,
  * Mountain View, CA  94043, or:
  *
@@ -687,9 +668,7 @@ static void __init sn_sal_switch_to_asynch(struct sn_cons_port *port)
 	 * timer to poll for input and push data from the console
 	 * buffer.
 	 */
-	init_timer(&port->sc_timer);
-	port->sc_timer.function = sn_sal_timer_poll;
-	port->sc_timer.data = (unsigned long)port;
+	setup_timer(&port->sc_timer, sn_sal_timer_poll, (unsigned long)port);
 
 	if (IS_RUNNING_ON_SIMULATOR())
 		port->sc_interrupt_timeout = 6;
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index e902494ebbd5..828f1143859c 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -1,14 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2012-2015 Spreadtrum Communications Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #if defined(CONFIG_SERIAL_SPRD_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index b313a792b149..c763253514e9 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * st-asc.c: ST Asynchronous serial controller (ASC) driver
  *
  * Copyright (C) 2003-2013 STMicroelectronics (R&D) Limited
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  */
 
 #if defined(CONFIG_SERIAL_ST_ASC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 03a583264d9e..0fa735b60f2d 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -1,9 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) Maxime Coquelin 2015
  * Copyright (C) STMicroelectronics SA 2017
  * Authors:  Maxime Coquelin <mcoquelin.stm32@gmail.com>
  *	     Gerald Baeza <gerald.baeza@st.com>
- * License terms:  GNU General Public License (GPL), version 2
  *
  * Inspired by st-asc.c from STMicroelectronics (c)
  */
@@ -736,11 +736,8 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
 
 #ifdef CONFIG_OF
 static const struct of_device_id stm32_match[] = {
-	{ .compatible = "st,stm32-usart", .data = &stm32f4_info},
 	{ .compatible = "st,stm32-uart", .data = &stm32f4_info},
-	{ .compatible = "st,stm32f7-usart", .data = &stm32f7_info},
 	{ .compatible = "st,stm32f7-uart", .data = &stm32f7_info},
-	{ .compatible = "st,stm32h7-usart", .data = &stm32h7_info},
 	{ .compatible = "st,stm32h7-uart", .data = &stm32h7_info},
 	{},
 };
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h
index ffc0c5285e51..8a5ff54d0f42 100644
--- a/drivers/tty/serial/stm32-usart.h
+++ b/drivers/tty/serial/stm32-usart.h
@@ -1,9 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) Maxime Coquelin 2015
  * Copyright (C) STMicroelectronics SA 2017
  * Authors:  Maxime Coquelin <mcoquelin.stm32@gmail.com>
  *	     Gerald Baeza <gerald_baeza@yahoo.fr>
- * License terms:  GNU General Public License (GPL), version 2
  */
 
 #define DRIVER_NAME "stm32-usart"
diff --git a/drivers/tty/serial/suncore.c b/drivers/tty/serial/suncore.c
index 127472bd6a7c..70a4ea4eaa6e 100644
--- a/drivers/tty/serial/suncore.c
+++ b/drivers/tty/serial/suncore.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /* suncore.c
  *
  * Common SUN serial routines.  Based entirely
diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c
index 46e46894e918..63e34d868de8 100644
--- a/drivers/tty/serial/sunhv.c
+++ b/drivers/tty/serial/sunhv.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /* sunhv.c: Serial driver for SUN4V hypervisor console.
  *
  * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index 653a076d89d3..b93d0225f8c9 100644
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /* sunsab.c: ASYNC Driver for the SIEMENS SAB82532 DUSCC.
  *
  * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 95d34d7565c9..6cf3e9b0728f 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI
  *
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index 252cea49c068..bc7af8b08a72 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /* sunzilog.c: Zilog serial driver for Sparc systems.
  *
  * Driver for Zilog serial chips found on Sun workstations and
diff --git a/drivers/tty/serial/tilegx.c b/drivers/tty/serial/tilegx.c
index 453215f5420d..f0a3ae57f881 100644
--- a/drivers/tty/serial/tilegx.c
+++ b/drivers/tty/serial/tilegx.c
@@ -1,16 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2013 Tilera Corporation. All Rights Reserved.
  *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- *
  * TILEGx UART driver.
  */
 
diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c
index 5da7fe40e391..19d38b504e27 100644
--- a/drivers/tty/serial/timbuart.c
+++ b/drivers/tty/serial/timbuart.c
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * timbuart.c timberdale FPGA UART driver
  * Copyright (c) 2009 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /* Supports:
diff --git a/drivers/tty/serial/timbuart.h b/drivers/tty/serial/timbuart.h
index 7e566766bc43..fb00b172117d 100644
--- a/drivers/tty/serial/timbuart.h
+++ b/drivers/tty/serial/timbuart.h
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * timbuart.c timberdale FPGA GPIO driver
  * Copyright (c) 2009 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /* Supports:
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index c9b8d702dadc..c47db7826189 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * uartlite.c: Serial driver for Xilinx uartlite serial controller
  *
  * Copyright (C) 2006 Peter Korsgaard <jacmet@sunsite.dk>
  * Copyright (C) 2007 Secret Lab Technologies Ltd.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2.  This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
  */
 
 #include <linux/platform_device.h>
@@ -739,7 +736,7 @@ static int __init ulite_init(void)
 err_plat:
 	uart_unregister_driver(&ulite_uart_driver);
 err_uart:
-	pr_err("registering uartlite driver failed: err=%i", ret);
+	pr_err("registering uartlite driver failed: err=%i\n", ret);
 	return ret;
 }
 
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 55b702775786..2b6376e6e5ad 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Freescale QUICC Engine UART device driver
  *
  * Author: Timur Tabi <timur@freescale.com>
  *
- * Copyright 2007 Freescale Semiconductor, Inc.  This file is licensed under
- * the terms of the GNU General Public License version 2.  This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
+ * Copyright 2007 Freescale Semiconductor, Inc.
  *
  * This driver adds support for UART devices via Freescale's QUICC Engine
  * found on some Freescale SOCs.
diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c
index 439057e8107a..6d106e33f842 100644
--- a/drivers/tty/serial/vr41xx_siu.c
+++ b/drivers/tty/serial/vr41xx_siu.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Driver for NEC VR4100 series Serial Interface Unit.
  *
  *  Copyright (C) 2004-2008  Yoichi Yuasa <yuasa@linux-mips.org>
  *
  *  Based on drivers/serial/8250.c, by Russell King.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 435a6f3260be..3d58e9b34553 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
  *
  * Based on msm_serial.c, which is:
  * Copyright (C) 2007 Google, Inc.
  * Author: Robert Love <rlove@google.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #if defined(CONFIG_SERIAL_VT8500_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 31a630ae0870..b9b2bc76bcac 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1,14 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Cadence UART driver (found in Xilinx Zynq)
  *
  * 2011 - 2014 (C) Xilinx Inc.
  *
- * This program is free software; you can redistribute it
- * and/or modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation;
- * either version 2 of the License, or (at your option) any
- * later version.
- *
  * This driver has originally been pushed by Xilinx using a Zynq-branding. This
  * still shows in the naming of this file, the kconfig symbols and some symbols
  * in the code.
@@ -1673,7 +1668,7 @@ static void __exit cdns_uart_exit(void)
 	uart_unregister_driver(&cdns_uart_uart_driver);
 }
 
-module_init(cdns_uart_init);
+arch_initcall(cdns_uart_init);
 module_exit(cdns_uart_exit);
 
 MODULE_DESCRIPTION("Driver for Cadence UART");
diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c
index d32bd499d684..b03d3e458ea2 100644
--- a/drivers/tty/serial/zs.c
+++ b/drivers/tty/serial/zs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * zs.c: Serial port driver for IOASIC DECstations.
  *
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 3be981101297..f2c34d656144 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
  *
@@ -13,8 +14,6 @@
  *
  * Original release 01/11/99
  *
- * This code is released under the GNU General Public License (GPL)
- *
  * This driver is primarily intended for use in synchronous
  * HDLC mode. Asynchronous mode is also provided.
  *
@@ -4098,8 +4097,7 @@ static int mgsl_claim_resources(struct mgsl_struct *info)
 		if (request_dma(info->dma_level,info->device_name) < 0){
 			printk( "%s(%d):Can't request DMA channel on device %s DMA=%d\n",
 				__FILE__,__LINE__,info->device_name, info->dma_level );
-			mgsl_release_resources( info );
-			return -ENODEV;
+			goto errout;
 		}
 		info->dma_requested = true;
 
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 636b8ae29b46..06a03731bba7 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  * Device driver for Microgate SyncLink GT serial adapters.
  *
@@ -6,8 +7,6 @@
  *
  * Microgate and SyncLink are trademarks of Microgate Corporation
  *
- * This code is released under the GNU General Public License (GPL)
- *
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 4fed9e7b281f..d45f234e1914 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
  *
@@ -10,7 +11,6 @@
  * Microgate and SyncLink are trademarks of Microgate Corporation
  *
  * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
- * This code is released under the GNU General Public License (GPL)
  *
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index d008f5a75197..b674793be478 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -246,8 +246,10 @@ static void sysrq_handle_showallcpus(int key)
 	 * architecture has no support for it:
 	 */
 	if (!trigger_all_cpu_backtrace()) {
-		struct pt_regs *regs = get_irq_regs();
+		struct pt_regs *regs = NULL;
 
+		if (in_irq())
+			regs = get_irq_regs();
 		if (regs) {
 			pr_info("CPU%d:\n", smp_processor_id());
 			show_regs(regs);
@@ -266,7 +268,10 @@ static struct sysrq_key_op sysrq_showallcpus_op = {
 
 static void sysrq_handle_showregs(int key)
 {
-	struct pt_regs *regs = get_irq_regs();
+	struct pt_regs *regs = NULL;
+
+	if (in_irq())
+		regs = get_irq_regs();
 	if (regs)
 		show_regs(regs);
 	perf_event_print_debug();
@@ -649,9 +654,9 @@ static void sysrq_parse_reset_sequence(struct sysrq_state *state)
 	state->reset_seq_version = sysrq_reset_seq_version;
 }
 
-static void sysrq_do_reset(unsigned long _state)
+static void sysrq_do_reset(struct timer_list *t)
 {
-	struct sysrq_state *state = (struct sysrq_state *) _state;
+	struct sysrq_state *state = from_timer(state, t, keyreset_timer);
 
 	state->reset_requested = true;
 
@@ -668,7 +673,7 @@ static void sysrq_handle_reset_request(struct sysrq_state *state)
 		mod_timer(&state->keyreset_timer,
 			jiffies + msecs_to_jiffies(sysrq_reset_downtime_ms));
 	else
-		sysrq_do_reset((unsigned long)state);
+		sysrq_do_reset(&state->keyreset_timer);
 }
 
 static void sysrq_detect_reset_sequence(struct sysrq_state *state,
@@ -904,8 +909,7 @@ static int sysrq_connect(struct input_handler *handler,
 	sysrq->handle.handler = handler;
 	sysrq->handle.name = "sysrq";
 	sysrq->handle.private = sysrq;
-	setup_timer(&sysrq->keyreset_timer,
-		    sysrq_do_reset, (unsigned long)sysrq);
+	timer_setup(&sysrq->keyreset_timer, sysrq_do_reset, 0);
 
 	error = input_register_handle(&sysrq->handle);
 	if (error) {
diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index df2d735338e2..e30aa6bf9ff9 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -1,10 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Creating audit events from TTY input.
  *
- * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.  This copyrighted
- * material is made available to anyone wishing to use, modify, copy, or
- * redistribute it subject to the terms and conditions of the GNU General
- * Public License v.2.
+ * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
  *
  * Authors: Miloslav Trmac <mitr@redhat.com>
  */
diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
index 5c33fd25676d..6ff8cdfc9d2a 100644
--- a/drivers/tty/tty_baudrate.c
+++ b/drivers/tty/tty_baudrate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
  */
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index f8eba1c5412f..c996b6859c5e 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Tty buffer allocation management
  */
@@ -446,7 +447,7 @@ EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
  *	Callers other than flush_to_ldisc() need to exclude the kworker
  *	from concurrent use of the line discipline, see paste_selection().
  *
- *	Returns the number of bytes not processed
+ *	Returns the number of bytes processed
  */
 int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
 			  char *f, int count)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 94cccb6efa32..dc60aeea87d8 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index efa96e6c4c1b..d9b561d89432 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
  *
diff --git a/drivers/tty/tty_jobctrl.c b/drivers/tty/tty_jobctrl.c
index e7032309ee87..c4ecd66fafef 100644
--- a/drivers/tty/tty_jobctrl.c
+++ b/drivers/tty/tty_jobctrl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 84a8ac2a779f..24ec5c7e6b20 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/kmod.h>
diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c
index 52b7baef4f7a..37a91b3df980 100644
--- a/drivers/tty/tty_ldsem.c
+++ b/drivers/tty/tty_ldsem.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Ldisc rw semaphore
  *
@@ -22,9 +23,6 @@
  * Michel Lespinasse <walken@google.com>.
  *
  * Copyright (C) 2013 Peter Hurley <peter@hurleysoftware.com>
- *
- * This file may be redistributed under the terms of the GNU General Public
- * License v2.
  */
 
 #include <linux/list.h>
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 6b137194069f..25d736880013 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Tty port functions
  */
@@ -78,7 +79,7 @@ EXPORT_SYMBOL(tty_port_init);
  * @driver: tty_driver for this device
  * @index: index of the tty
  *
- * Provide the tty layer wit ha link from a tty (specified by @index) to a
+ * Provide the tty layer with a link from a tty (specified by @index) to a
  * tty_port (@port). Use this only if neither tty_port_register_device nor
  * tty_port_install is used in the driver. If used, this has to be called before
  * tty_register_driver.
@@ -235,7 +236,7 @@ EXPORT_SYMBOL(tty_port_free_xmit_buf);
 
 /**
  * tty_port_destroy -- destroy inited port
- * @port: tty port to be doestroyed
+ * @port: tty port to be destroyed
  *
  * When a port was initialized using tty_port_init, one has to destroy the
  * port by this function. Either indirectly by using tty_port refcounting
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index ef01d24858cd..58b454c34560 100644
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -361,17 +361,13 @@ done:
 	return rv;
 }
 
-static void vcc_rx_timer(unsigned long index)
+static void vcc_rx_timer(struct timer_list *t)
 {
+	struct vcc_port *port = from_timer(port, t, rx_timer);
 	struct vio_driver_state *vio;
-	struct vcc_port *port;
 	unsigned long flags;
 	int rv;
 
-	port = vcc_get_ne(index);
-	if (!port)
-		return;
-
 	spin_lock_irqsave(&port->lock, flags);
 	port->rx_timer.expires = 0;
 
@@ -391,18 +387,14 @@ done:
 	vcc_put(port, false);
 }
 
-static void vcc_tx_timer(unsigned long index)
+static void vcc_tx_timer(struct timer_list *t)
 {
-	struct vcc_port *port;
+	struct vcc_port *port = from_timer(port, t, tx_timer);
 	struct vio_vcc *pkt;
 	unsigned long flags;
 	int tosend = 0;
 	int rv;
 
-	port = vcc_get_ne(index);
-	if (!port)
-		return;
-
 	spin_lock_irqsave(&port->lock, flags);
 	port->tx_timer.expires = 0;
 
@@ -645,13 +637,8 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	if (rv)
 		goto free_domain;
 
-	init_timer(&port->rx_timer);
-	port->rx_timer.function = vcc_rx_timer;
-	port->rx_timer.data = port->index;
-
-	init_timer(&port->tx_timer);
-	port->tx_timer.function = vcc_tx_timer;
-	port->tx_timer.data = port->index;
+	timer_setup(&port->rx_timer, vcc_rx_timer, 0);
+	timer_setup(&port->tx_timer, vcc_tx_timer, 0);
 
 	dev_set_drvdata(&vdev->dev, port);
 
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index a5f88cf0f61d..722a6690c70d 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * consolemap.c
  *
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index f974d6340d04..c8d90d7e7e37 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Written for linux by Johan Myreen as a translation from
  * the assembly version by Linus (with diacriticals added)
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 602d71630952..bce4c71cb338 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
@@ -102,6 +103,7 @@
 #include <linux/uaccess.h>
 #include <linux/kdb.h>
 #include <linux/ctype.h>
+#include <linux/bsearch.h>
 
 #define MAX_NR_CON_DRIVER 16
 
@@ -2142,22 +2144,15 @@ struct interval {
 	uint32_t last;
 };
 
-static int bisearch(uint32_t ucs, const struct interval *table, int max)
+static int ucs_cmp(const void *key, const void *elt)
 {
-	int min = 0;
-	int mid;
+	uint32_t ucs = *(uint32_t *)key;
+	struct interval e = *(struct interval *) elt;
 
-	if (ucs < table[0].first || ucs > table[max].last)
-		return 0;
-	while (max >= min) {
-		mid = (min + max) / 2;
-		if (ucs > table[mid].last)
-			min = mid + 1;
-		else if (ucs < table[mid].first)
-			max = mid - 1;
-		else
-			return 1;
-	}
+	if (ucs > e.last)
+		return 1;
+	else if (ucs < e.first)
+		return -1;
 	return 0;
 }
 
@@ -2169,7 +2164,12 @@ static int is_double_width(uint32_t ucs)
 		{ 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
 		{ 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
 	};
-	return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
+	if (ucs < double_width[0].first ||
+	    ucs > double_width[ARRAY_SIZE(double_width) - 1].last)
+		return 0;
+
+	return bsearch(&ucs, double_width, ARRAY_SIZE(double_width),
+			sizeof(struct interval), ucs_cmp) != NULL;
 }
 
 static void con_flush(struct vc_data *vc, unsigned long draw_from,
@@ -2205,7 +2205,7 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
 	console_lock();
 	vc = tty->driver_data;
 	if (vc == NULL) {
-		printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
+		pr_err("vt: argh, driver_data is NULL !\n");
 		console_unlock();
 		return 0;
 	}
@@ -3190,20 +3190,21 @@ static int do_bind_con_driver(const struct consw *csw, int first, int last,
 
 	pr_info("Console: switching ");
 	if (!deflt)
-		printk(KERN_CONT "consoles %d-%d ", first+1, last+1);
+		pr_cont("consoles %d-%d ", first + 1, last + 1);
 	if (j >= 0) {
 		struct vc_data *vc = vc_cons[j].d;
 
-		printk(KERN_CONT "to %s %s %dx%d\n",
-		       vc->vc_can_do_color ? "colour" : "mono",
-		       desc, vc->vc_cols, vc->vc_rows);
+		pr_cont("to %s %s %dx%d\n",
+			vc->vc_can_do_color ? "colour" : "mono",
+			desc, vc->vc_cols, vc->vc_rows);
 
 		if (k >= 0) {
 			vc = vc_cons[k].d;
 			update_screen(vc);
 		}
-	} else
-		printk(KERN_CONT "to %s\n", desc);
+	} else {
+		pr_cont("to %s\n", desc);
+	}
 
 	retval = 0;
 err:
@@ -3622,9 +3623,8 @@ static int do_register_con_driver(const struct consw *csw, int first, int last)
 					  con_driver, con_dev_groups,
 					  "vtcon%i", con_driver->node);
 	if (IS_ERR(con_driver->dev)) {
-		printk(KERN_WARNING "Unable to create device for %s; "
-		       "errno = %ld\n", con_driver->desc,
-		       PTR_ERR(con_driver->dev));
+		pr_warn("Unable to create device for %s; errno = %ld\n",
+			con_driver->desc, PTR_ERR(con_driver->dev));
 		con_driver->dev = NULL;
 	} else {
 		vtconsole_init_device(con_driver);
@@ -3761,8 +3761,8 @@ static int __init vtconsole_class_init(void)
 
 	vtconsole_class = class_create(THIS_MODULE, "vtconsole");
 	if (IS_ERR(vtconsole_class)) {
-		printk(KERN_WARNING "Unable to create vt console class; "
-		       "errno = %ld\n", PTR_ERR(vtconsole_class));
+		pr_warn("Unable to create vt console class; errno = %ld\n",
+			PTR_ERR(vtconsole_class));
 		vtconsole_class = NULL;
 	}
 
@@ -3778,9 +3778,8 @@ static int __init vtconsole_class_init(void)
 							  "vtcon%i", con->node);
 
 			if (IS_ERR(con->dev)) {
-				printk(KERN_WARNING "Unable to create "
-				       "device for %s; errno = %ld\n",
-				       con->desc, PTR_ERR(con->dev));
+				pr_warn("Unable to create device for %s; errno = %ld\n",
+					con->desc, PTR_ERR(con->dev));
 				con->dev = NULL;
 			} else {
 				vtconsole_init_device(con);
@@ -4121,37 +4120,45 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
 		return -EINVAL;
 	if (op->charcount > 512)
 		return -EINVAL;
+	if (op->width <= 0 || op->width > 32 || op->height > 32)
+		return -EINVAL;
+	size = (op->width+7)/8 * 32 * op->charcount;
+	if (size > max_font_size)
+		return -ENOSPC;
+
+	font.data = memdup_user(op->data, size);
+	if (IS_ERR(font.data))
+		return PTR_ERR(font.data);
+
 	if (!op->height) {		/* Need to guess font height [compat] */
 		int h, i;
-		u8 __user *charmap = op->data;
-		u8 tmp;
-		
-		/* If from KDFONTOP ioctl, don't allow things which can be done in userland,
-		   so that we can get rid of this soon */
-		if (!(op->flags & KD_FONT_FLAG_OLD))
+		u8 *charmap = font.data;
+
+		/*
+		 * If from KDFONTOP ioctl, don't allow things which can be done
+		 * in userland,so that we can get rid of this soon
+		 */
+		if (!(op->flags & KD_FONT_FLAG_OLD)) {
+			kfree(font.data);
 			return -EINVAL;
+		}
+
 		for (h = 32; h > 0; h--)
-			for (i = 0; i < op->charcount; i++) {
-				if (get_user(tmp, &charmap[32*i+h-1]))
-					return -EFAULT;
-				if (tmp)
+			for (i = 0; i < op->charcount; i++)
+				if (charmap[32*i+h-1])
 					goto nonzero;
-			}
+
+		kfree(font.data);
 		return -EINVAL;
+
 	nonzero:
 		op->height = h;
 	}
-	if (op->width <= 0 || op->width > 32 || op->height > 32)
-		return -EINVAL;
-	size = (op->width+7)/8 * 32 * op->charcount;
-	if (size > max_font_size)
-		return -ENOSPC;
+
 	font.charcount = op->charcount;
-	font.height = op->height;
 	font.width = op->width;
-	font.data = memdup_user(op->data, size);
-	if (IS_ERR(font.data))
-		return PTR_ERR(font.data);
+	font.height = op->height;
+
 	console_lock();
 	if (vc->vc_mode != KD_TEXT)
 		rc = -EINVAL;