tty: move drivers/serial/ to drivers/tty/serial/

The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.

This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: Michael H. Warfield <mhw@wittsend.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 1406 deletions

diff --git a/drivers/serial/ifx6x60.c b/drivers/serial/ifx6x60.c
deleted file mode 100644
index ab93763862d5..000000000000
--- a/drivers/serial/ifx6x60.c
+++ /dev/null
@@ -1,1406 +0,0 @@
-/****************************************************************************
- *
- * Driver for the IFX 6x60 spi modem.
- *
- * Copyright (C) 2008 Option International
- * Copyright (C) 2008 Filip Aben <f.aben@option.com>
- *		      Denis Joseph Barrow <d.barow@option.com>
- *		      Jan Dumon <j.dumon@option.com>
- *
- * Copyright (C) 2009, 2010 Intel Corp
- * Russ Gorby <richardx.r.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
- * o	The driver currently assumes a single device only. If you need to
- *	change this then look for saved_ifx_dev and add a device lookup
- * o	The driver is intended to be big-endian safe but has never been
- *	tested that way (no suitable hardware). There are a couple of FIXME
- *	notes by areas that may need addressing
- * o	Some of the GPIO naming/setup assumptions may need revisiting if
- *	you need to use this driver for another platform.
- *
- *****************************************************************************/
-#include <linux/module.h>
-#include <linux/termios.h>
-#include <linux/tty.h>
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-#include <linux/tty.h>
-#include <linux/kfifo.h>
-#include <linux/tty_flip.h>
-#include <linux/timer.h>
-#include <linux/serial.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/rfkill.h>
-#include <linux/fs.h>
-#include <linux/ip.h>
-#include <linux/dmapool.h>
-#include <linux/gpio.h>
-#include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/wait.h>
-#include <linux/tty.h>
-#include <linux/pm.h>
-#include <linux/pm_runtime.h>
-#include <linux/spi/ifx_modem.h>
-#include <linux/delay.h>
-
-#include "ifx6x60.h"
-
-#define IFX_SPI_MORE_MASK		0x10
-#define IFX_SPI_MORE_BIT		12	/* bit position in u16 */
-#define IFX_SPI_CTS_BIT			13	/* bit position in u16 */
-#define IFX_SPI_TTY_ID			0
-#define IFX_SPI_TIMEOUT_SEC		2
-#define IFX_SPI_HEADER_0		(-1)
-#define IFX_SPI_HEADER_F		(-2)
-
-/* forward reference */
-static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev);
-
-/* local variables */
-static int spi_b16 = 1;			/* 8 or 16 bit word length */
-static struct tty_driver *tty_drv;
-static struct ifx_spi_device *saved_ifx_dev;
-static struct lock_class_key ifx_spi_key;
-
-/* GPIO/GPE settings */
-
-/**
- *	mrdy_set_high		-	set MRDY GPIO
- *	@ifx: device we are controlling
- *
- */
-static inline void mrdy_set_high(struct ifx_spi_device *ifx)
-{
-	gpio_set_value(ifx->gpio.mrdy, 1);
-}
-
-/**
- *	mrdy_set_low		-	clear MRDY GPIO
- *	@ifx: device we are controlling
- *
- */
-static inline void mrdy_set_low(struct ifx_spi_device *ifx)
-{
-	gpio_set_value(ifx->gpio.mrdy, 0);
-}
-
-/**
- *	ifx_spi_power_state_set
- *	@ifx_dev: our SPI device
- *	@val: bits to set
- *
- *	Set bit in power status and signal power system if status becomes non-0
- */
-static void
-ifx_spi_power_state_set(struct ifx_spi_device *ifx_dev, unsigned char val)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&ifx_dev->power_lock, flags);
-
-	/*
-	 * if power status is already non-0, just update, else
-	 * tell power system
-	 */
-	if (!ifx_dev->power_status)
-		pm_runtime_get(&ifx_dev->spi_dev->dev);
-	ifx_dev->power_status |= val;
-
-	spin_unlock_irqrestore(&ifx_dev->power_lock, flags);
-}
-
-/**
- *	ifx_spi_power_state_clear	-	clear power bit
- *	@ifx_dev: our SPI device
- *	@val: bits to clear
- *
- *	clear bit in power status and signal power system if status becomes 0
- */
-static void
-ifx_spi_power_state_clear(struct ifx_spi_device *ifx_dev, unsigned char val)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&ifx_dev->power_lock, flags);
-
-	if (ifx_dev->power_status) {
-		ifx_dev->power_status &= ~val;
-		if (!ifx_dev->power_status)
-			pm_runtime_put(&ifx_dev->spi_dev->dev);
-	}
-
-	spin_unlock_irqrestore(&ifx_dev->power_lock, flags);
-}
-
-/**
- *	swap_buf
- *	@buf: our buffer
- *	@len : number of bytes (not words) in the buffer
- *	@end: end of buffer
- *
- *	Swap the contents of a buffer into big endian format
- */
-static inline void swap_buf(u16 *buf, int len, void *end)
-{
-	int n;
-
-	len = ((len + 1) >> 1);
-	if ((void *)&buf[len] > end) {
-		pr_err("swap_buf: swap exceeds boundary (%p > %p)!",
-		       &buf[len], end);
-		return;
-	}
-	for (n = 0; n < len; n++) {
-		*buf = cpu_to_be16(*buf);
-		buf++;
-	}
-}
-
-/**
- *	mrdy_assert		-	assert MRDY line
- *	@ifx_dev: our SPI device
- *
- *	Assert mrdy and set timer to wait for SRDY interrupt, if SRDY is low
- *	now.
- *
- *	FIXME: Can SRDY even go high as we are running this code ?
- */
-static void mrdy_assert(struct ifx_spi_device *ifx_dev)
-{
-	int val = gpio_get_value(ifx_dev->gpio.srdy);
-	if (!val) {
-		if (!test_and_set_bit(IFX_SPI_STATE_TIMER_PENDING,
-				      &ifx_dev->flags)) {
-			ifx_dev->spi_timer.expires =
-				jiffies + IFX_SPI_TIMEOUT_SEC*HZ;
-			add_timer(&ifx_dev->spi_timer);
-
-		}
-	}
-	ifx_spi_power_state_set(ifx_dev, IFX_SPI_POWER_DATA_PENDING);
-	mrdy_set_high(ifx_dev);
-}
-
-/**
- *	ifx_spi_hangup		-	hang up an IFX device
- *	@ifx_dev: our SPI device
- *
- *	Hang up the tty attached to the IFX device if one is currently
- *	open. If not take no action
- */
-static void ifx_spi_ttyhangup(struct ifx_spi_device *ifx_dev)
-{
-	struct tty_port *pport = &ifx_dev->tty_port;
-	struct tty_struct *tty = tty_port_tty_get(pport);
-	if (tty) {
-		tty_hangup(tty);
-		tty_kref_put(tty);
-	}
-}
-
-/**
- *	ifx_spi_timeout		-	SPI timeout
- *	@arg: our SPI device
- *
- *	The SPI has timed out: hang up the tty. Users will then see a hangup
- *	and error events.
- */
-static void ifx_spi_timeout(unsigned long arg)
-{
-	struct ifx_spi_device *ifx_dev = (struct ifx_spi_device *)arg;
-
-	dev_warn(&ifx_dev->spi_dev->dev, "*** SPI Timeout ***");
-	ifx_spi_ttyhangup(ifx_dev);
-	mrdy_set_low(ifx_dev);
-	clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
-}
-
-/* char/tty operations */
-
-/**
- *	ifx_spi_tiocmget	-	get modem lines
- *	@tty: our tty device
- *	@filp: file handle issuing the request
- *
- *	Map the signal state into Linux modem flags and report the value
- *	in Linux terms
- */
-static int ifx_spi_tiocmget(struct tty_struct *tty, struct file *filp)
-{
-	unsigned int value;
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-
-	value =
-	(test_bit(IFX_SPI_RTS, &ifx_dev->signal_state) ? TIOCM_RTS : 0) |
-	(test_bit(IFX_SPI_DTR, &ifx_dev->signal_state) ? TIOCM_DTR : 0) |
-	(test_bit(IFX_SPI_CTS, &ifx_dev->signal_state) ? TIOCM_CTS : 0) |
-	(test_bit(IFX_SPI_DSR, &ifx_dev->signal_state) ? TIOCM_DSR : 0) |
-	(test_bit(IFX_SPI_DCD, &ifx_dev->signal_state) ? TIOCM_CAR : 0) |
-	(test_bit(IFX_SPI_RI, &ifx_dev->signal_state) ? TIOCM_RNG : 0);
-	return value;
-}
-
-/**
- *	ifx_spi_tiocmset	-	set modem bits
- *	@tty: the tty structure
- *	@filp: file handle issuing the request
- *	@set: bits to set
- *	@clear: bits to clear
- *
- *	The IFX6x60 only supports DTR and RTS. Set them accordingly
- *	and flag that an update to the modem is needed.
- *
- *	FIXME: do we need to kick the tranfers when we do this ?
- */
-static int ifx_spi_tiocmset(struct tty_struct *tty, struct file *filp,
-			    unsigned int set, unsigned int clear)
-{
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-
-	if (set & TIOCM_RTS)
-		set_bit(IFX_SPI_RTS, &ifx_dev->signal_state);
-	if (set & TIOCM_DTR)
-		set_bit(IFX_SPI_DTR, &ifx_dev->signal_state);
-	if (clear & TIOCM_RTS)
-		clear_bit(IFX_SPI_RTS, &ifx_dev->signal_state);
-	if (clear & TIOCM_DTR)
-		clear_bit(IFX_SPI_DTR, &ifx_dev->signal_state);
-
-	set_bit(IFX_SPI_UPDATE, &ifx_dev->signal_state);
-	return 0;
-}
-
-/**
- *	ifx_spi_open	-	called on tty open
- *	@tty: our tty device
- *	@filp: file handle being associated with the tty
- *
- *	Open the tty interface. We let the tty_port layer do all the work
- *	for us.
- *
- *	FIXME: Remove single device assumption and saved_ifx_dev
- */
-static int ifx_spi_open(struct tty_struct *tty, struct file *filp)
-{
-	return tty_port_open(&saved_ifx_dev->tty_port, tty, filp);
-}
-
-/**
- *	ifx_spi_close	-	called when our tty closes
- *	@tty: the tty being closed
- *	@filp: the file handle being closed
- *
- *	Perform the close of the tty. We use the tty_port layer to do all
- *	our hard work.
- */
-static void ifx_spi_close(struct tty_struct *tty, struct file *filp)
-{
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-	tty_port_close(&ifx_dev->tty_port, tty, filp);
-	/* FIXME: should we do an ifx_spi_reset here ? */
-}
-
-/**
- *	ifx_decode_spi_header	-	decode received header
- *	@buffer: the received data
- *	@length: decoded length
- *	@more: decoded more flag
- *	@received_cts: status of cts we received
- *
- *	Note how received_cts is handled -- if header is all F it is left
- *	the same as it was, if header is all 0 it is set to 0 otherwise it is
- *	taken from the incoming header.
- *
- *	FIXME: endianness
- */
-static int ifx_spi_decode_spi_header(unsigned char *buffer, int *length,
-			unsigned char *more, unsigned char *received_cts)
-{
-	u16 h1;
-	u16 h2;
-	u16 *in_buffer = (u16 *)buffer;
-
-	h1 = *in_buffer;
-	h2 = *(in_buffer+1);
-
-	if (h1 == 0 && h2 == 0) {
-		*received_cts = 0;
-		return IFX_SPI_HEADER_0;
-	} else if (h1 == 0xffff && h2 == 0xffff) {
-		/* spi_slave_cts remains as it was */
-		return IFX_SPI_HEADER_F;
-	}
-
-	*length = h1 & 0xfff;	/* upper bits of byte are flags */
-	*more = (buffer[1] >> IFX_SPI_MORE_BIT) & 1;
-	*received_cts = (buffer[3] >> IFX_SPI_CTS_BIT) & 1;
-	return 0;
-}
-
-/**
- *	ifx_setup_spi_header	-	set header fields
- *	@txbuffer: pointer to start of SPI buffer
- *	@tx_count: bytes
- *	@more: indicate if more to follow
- *
- *	Format up an SPI header for a transfer
- *
- *	FIXME: endianness?
- */
-static void ifx_spi_setup_spi_header(unsigned char *txbuffer, int tx_count,
-					unsigned char more)
-{
-	*(u16 *)(txbuffer) = tx_count;
-	*(u16 *)(txbuffer+2) = IFX_SPI_PAYLOAD_SIZE;
-	txbuffer[1] |= (more << IFX_SPI_MORE_BIT) & IFX_SPI_MORE_MASK;
-}
-
-/**
- *	ifx_spi_wakeup_serial	-	SPI space made
- *	@port_data: our SPI device
- *
- *	We have emptied the FIFO enough that we want to get more data
- *	queued into it. Poke the line discipline via tty_wakeup so that
- *	it will feed us more bits
- */
-static void ifx_spi_wakeup_serial(struct ifx_spi_device *ifx_dev)
-{
-	struct tty_struct *tty;
-
-	tty = tty_port_tty_get(&ifx_dev->tty_port);
-	if (!tty)
-		return;
-	tty_wakeup(tty);
-	tty_kref_put(tty);
-}
-
-/**
- *	ifx_spi_prepare_tx_buffer	-	prepare transmit frame
- *	@ifx_dev: our SPI device
- *
- *	The transmit buffr needs a header and various other bits of
- *	information followed by as much data as we can pull from the FIFO
- *	and transfer. This function formats up a suitable buffer in the
- *	ifx_dev->tx_buffer
- *
- *	FIXME: performance - should we wake the tty when the queue is half
- *			     empty ?
- */
-static int ifx_spi_prepare_tx_buffer(struct ifx_spi_device *ifx_dev)
-{
-	int temp_count;
-	int queue_length;
-	int tx_count;
-	unsigned char *tx_buffer;
-
-	tx_buffer = ifx_dev->tx_buffer;
-	memset(tx_buffer, 0, IFX_SPI_TRANSFER_SIZE);
-
-	/* make room for required SPI header */
-	tx_buffer += IFX_SPI_HEADER_OVERHEAD;
-	tx_count = IFX_SPI_HEADER_OVERHEAD;
-
-	/* clear to signal no more data if this turns out to be the
-	 * last buffer sent in a sequence */
-	ifx_dev->spi_more = 0;
-
-	/* if modem cts is set, just send empty buffer */
-	if (!ifx_dev->spi_slave_cts) {
-		/* see if there's tx data */
-		queue_length = kfifo_len(&ifx_dev->tx_fifo);
-		if (queue_length != 0) {
-			/* data to mux -- see if there's room for it */
-			temp_count = min(queue_length, IFX_SPI_PAYLOAD_SIZE);
-			temp_count = kfifo_out_locked(&ifx_dev->tx_fifo,
-					tx_buffer, temp_count,
-					&ifx_dev->fifo_lock);
-
-			/* update buffer pointer and data count in message */
-			tx_buffer += temp_count;
-			tx_count += temp_count;
-			if (temp_count == queue_length)
-				/* poke port to get more data */
-				ifx_spi_wakeup_serial(ifx_dev);
-			else /* more data in port, use next SPI message */
-				ifx_dev->spi_more = 1;
-		}
-	}
-	/* have data and info for header -- set up SPI header in buffer */
-	/* spi header needs payload size, not entire buffer size */
-	ifx_spi_setup_spi_header(ifx_dev->tx_buffer,
-					tx_count-IFX_SPI_HEADER_OVERHEAD,
-					ifx_dev->spi_more);
-	/* swap actual data in the buffer */
-	swap_buf((u16 *)(ifx_dev->tx_buffer), tx_count,
-		&ifx_dev->tx_buffer[IFX_SPI_TRANSFER_SIZE]);
-	return tx_count;
-}
-
-/**
- *	ifx_spi_write		-	line discipline write
- *	@tty: our tty device
- *	@buf: pointer to buffer to write (kernel space)
- *	@count: size of buffer
- *
- *	Write the characters we have been given into the FIFO. If the device
- *	is not active then activate it, when the SRDY line is asserted back
- *	this will commence I/O
- */
-static int ifx_spi_write(struct tty_struct *tty, const unsigned char *buf,
-			 int count)
-{
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-	unsigned char *tmp_buf = (unsigned char *)buf;
-	int tx_count = kfifo_in_locked(&ifx_dev->tx_fifo, tmp_buf, count,
-				   &ifx_dev->fifo_lock);
-	mrdy_assert(ifx_dev);
-	return tx_count;
-}
-
-/**
- *	ifx_spi_chars_in_buffer	-	line discipline helper
- *	@tty: our tty device
- *
- *	Report how much data we can accept before we drop bytes. As we use
- *	a simple FIFO this is nice and easy.
- */
-static int ifx_spi_write_room(struct tty_struct *tty)
-{
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-	return IFX_SPI_FIFO_SIZE - kfifo_len(&ifx_dev->tx_fifo);
-}
-
-/**
- *	ifx_spi_chars_in_buffer	-	line discipline helper
- *	@tty: our tty device
- *
- *	Report how many characters we have buffered. In our case this is the
- *	number of bytes sitting in our transmit FIFO.
- */
-static int ifx_spi_chars_in_buffer(struct tty_struct *tty)
-{
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-	return kfifo_len(&ifx_dev->tx_fifo);
-}
-
-/**
- *	ifx_port_hangup
- *	@port: our tty port
- *
- *	tty port hang up. Called when tty_hangup processing is invoked either
- *	by loss of carrier, or by software (eg vhangup). Serialized against
- *	activate/shutdown by the tty layer.
- */
-static void ifx_spi_hangup(struct tty_struct *tty)
-{
-	struct ifx_spi_device *ifx_dev = tty->driver_data;
-	tty_port_hangup(&ifx_dev->tty_port);
-}
-
-/**
- *	ifx_port_activate
- *	@port: our tty port
- *
- *	tty port activate method - called for first open. Serialized
- *	with hangup and shutdown by the tty layer.
- */
-static int ifx_port_activate(struct tty_port *port, struct tty_struct *tty)
-{
-	struct ifx_spi_device *ifx_dev =
-		container_of(port, struct ifx_spi_device, tty_port);
-
-	/* clear any old data; can't do this in 'close' */
-	kfifo_reset(&ifx_dev->tx_fifo);
-
-	/* put port data into this tty */
-	tty->driver_data = ifx_dev;
-
-	/* allows flip string push from int context */
-	tty->low_latency = 1;
-
-	return 0;
-}
-
-/**
- *	ifx_port_shutdown
- *	@port: our tty port
- *
- *	tty port shutdown method - called for last port close. Serialized
- *	with hangup and activate by the tty layer.
- */
-static void ifx_port_shutdown(struct tty_port *port)
-{
-	struct ifx_spi_device *ifx_dev =
-		container_of(port, struct ifx_spi_device, tty_port);
-
-	mrdy_set_low(ifx_dev);
-	clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
-	tasklet_kill(&ifx_dev->io_work_tasklet);
-}
-
-static const struct tty_port_operations ifx_tty_port_ops = {
-	.activate = ifx_port_activate,
-	.shutdown = ifx_port_shutdown,
-};
-
-static const struct tty_operations ifx_spi_serial_ops = {
-	.open = ifx_spi_open,
-	.close = ifx_spi_close,
-	.write = ifx_spi_write,
-	.hangup = ifx_spi_hangup,
-	.write_room = ifx_spi_write_room,
-	.chars_in_buffer = ifx_spi_chars_in_buffer,
-	.tiocmget = ifx_spi_tiocmget,
-	.tiocmset = ifx_spi_tiocmset,
-};
-
-/**
- *	ifx_spi_insert_fip_string	-	queue received data
- *	@ifx_ser: our SPI device
- *	@chars: buffer we have received
- *	@size: number of chars reeived
- *
- *	Queue bytes to the tty assuming the tty side is currently open. If
- *	not the discard the data.
- */
-static void ifx_spi_insert_flip_string(struct ifx_spi_device *ifx_dev,
-				    unsigned char *chars, size_t size)
-{
-	struct tty_struct *tty = tty_port_tty_get(&ifx_dev->tty_port);
-	if (!tty)
-		return;
-	tty_insert_flip_string(tty, chars, size);
-	tty_flip_buffer_push(tty);
-	tty_kref_put(tty);
-}
-
-/**
- *	ifx_spi_complete	-	SPI transfer completed
- *	@ctx: our SPI device
- *
- *	An SPI transfer has completed. Process any received data and kick off
- *	any further transmits we can commence.
- */
-static void ifx_spi_complete(void *ctx)
-{
-	struct ifx_spi_device *ifx_dev = ctx;
-	struct tty_struct *tty;
-	struct tty_ldisc *ldisc = NULL;
-	int length;
-	int actual_length;
-	unsigned char more;
-	unsigned char cts;
-	int local_write_pending = 0;
-	int queue_length;
-	int srdy;
-	int decode_result;
-
-	mrdy_set_low(ifx_dev);
-
-	if (!ifx_dev->spi_msg.status) {
-		/* check header validity, get comm flags */
-		swap_buf((u16 *)ifx_dev->rx_buffer, IFX_SPI_HEADER_OVERHEAD,
-			&ifx_dev->rx_buffer[IFX_SPI_HEADER_OVERHEAD]);
-		decode_result = ifx_spi_decode_spi_header(ifx_dev->rx_buffer,
-				&length, &more, &cts);
-		if (decode_result == IFX_SPI_HEADER_0) {
-			dev_dbg(&ifx_dev->spi_dev->dev,
-				"ignore input: invalid header 0");
-			ifx_dev->spi_slave_cts = 0;
-			goto complete_exit;
-		} else if (decode_result == IFX_SPI_HEADER_F) {
-			dev_dbg(&ifx_dev->spi_dev->dev,
-				"ignore input: invalid header F");
-			goto complete_exit;
-		}
-
-		ifx_dev->spi_slave_cts = cts;
-
-		actual_length = min((unsigned int)length,
-					ifx_dev->spi_msg.actual_length);
-		swap_buf((u16 *)(ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD),
-			 actual_length,
-			 &ifx_dev->rx_buffer[IFX_SPI_TRANSFER_SIZE]);
-		ifx_spi_insert_flip_string(
-			ifx_dev,
-			ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD,
-			(size_t)actual_length);
-	} else {
-		dev_dbg(&ifx_dev->spi_dev->dev, "SPI transfer error %d",
-		       ifx_dev->spi_msg.status);
-	}
-
-complete_exit:
-	if (ifx_dev->write_pending) {
-		ifx_dev->write_pending = 0;
-		local_write_pending = 1;
-	}
-
-	clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &(ifx_dev->flags));
-
-	queue_length = kfifo_len(&ifx_dev->tx_fifo);
-	srdy = gpio_get_value(ifx_dev->gpio.srdy);
-	if (!srdy)
-		ifx_spi_power_state_clear(ifx_dev, IFX_SPI_POWER_SRDY);
-
-	/* schedule output if there is more to do */
-	if (test_and_clear_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags))
-		tasklet_schedule(&ifx_dev->io_work_tasklet);
-	else {
-		if (more || ifx_dev->spi_more || queue_length > 0 ||
-			local_write_pending) {
-			if (ifx_dev->spi_slave_cts) {
-				if (more)
-					mrdy_assert(ifx_dev);
-			} else
-				mrdy_assert(ifx_dev);
-		} else {
-			/*
-			 * poke line discipline driver if any for more data
-			 * may or may not get more data to write
-			 * for now, say not busy
-			 */
-			ifx_spi_power_state_clear(ifx_dev,
-						  IFX_SPI_POWER_DATA_PENDING);
-			tty = tty_port_tty_get(&ifx_dev->tty_port);
-			if (tty) {
-				ldisc = tty_ldisc_ref(tty);
-				if (ldisc) {
-					ldisc->ops->write_wakeup(tty);
-					tty_ldisc_deref(ldisc);
-				}
-				tty_kref_put(tty);
-			}
-		}
-	}
-}
-
-/**
- *	ifx_spio_io		-	I/O tasklet
- *	@data: our SPI device
- *
- *	Queue data for transmission if possible and then kick off the
- *	transfer.
- */
-static void ifx_spi_io(unsigned long data)
-{
-	int retval;
-	struct ifx_spi_device *ifx_dev = (struct ifx_spi_device *) data;
-
-	if (!test_and_set_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags)) {
-		if (ifx_dev->gpio.unack_srdy_int_nb > 0)
-			ifx_dev->gpio.unack_srdy_int_nb--;
-
-		ifx_spi_prepare_tx_buffer(ifx_dev);
-
-		spi_message_init(&ifx_dev->spi_msg);
-		INIT_LIST_HEAD(&ifx_dev->spi_msg.queue);
-
-		ifx_dev->spi_msg.context = ifx_dev;
-		ifx_dev->spi_msg.complete = ifx_spi_complete;
-
-		/* set up our spi transfer */
-		/* note len is BYTES, not transfers */
-		ifx_dev->spi_xfer.len = IFX_SPI_TRANSFER_SIZE;
-		ifx_dev->spi_xfer.cs_change = 0;
-		ifx_dev->spi_xfer.speed_hz = 12500000;
-		/* ifx_dev->spi_xfer.speed_hz = 390625; */
-		ifx_dev->spi_xfer.bits_per_word = spi_b16 ? 16 : 8;
-
-		ifx_dev->spi_xfer.tx_buf = ifx_dev->tx_buffer;
-		ifx_dev->spi_xfer.rx_buf = ifx_dev->rx_buffer;
-
-		/*
-		 * setup dma pointers
-		 */
-		if (ifx_dev->is_6160) {
-			ifx_dev->spi_msg.is_dma_mapped = 1;
-			ifx_dev->tx_dma = ifx_dev->tx_bus;
-			ifx_dev->rx_dma = ifx_dev->rx_bus;
-			ifx_dev->spi_xfer.tx_dma = ifx_dev->tx_dma;
-			ifx_dev->spi_xfer.rx_dma = ifx_dev->rx_dma;
-		} else {
-			ifx_dev->spi_msg.is_dma_mapped = 0;
-			ifx_dev->tx_dma = (dma_addr_t)0;
-			ifx_dev->rx_dma = (dma_addr_t)0;
-			ifx_dev->spi_xfer.tx_dma = (dma_addr_t)0;
-			ifx_dev->spi_xfer.rx_dma = (dma_addr_t)0;
-		}
-
-		spi_message_add_tail(&ifx_dev->spi_xfer, &ifx_dev->spi_msg);
-
-		/* Assert MRDY. This may have already been done by the write
-		 * routine.
-		 */
-		mrdy_assert(ifx_dev);
-
-		retval = spi_async(ifx_dev->spi_dev, &ifx_dev->spi_msg);
-		if (retval) {
-			clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS,
-				  &ifx_dev->flags);
-			tasklet_schedule(&ifx_dev->io_work_tasklet);
-			return;
-		}
-	} else
-		ifx_dev->write_pending = 1;
-}
-
-/**
- *	ifx_spi_free_port	-	free up the tty side
- *	@ifx_dev: IFX device going away
- *
- *	Unregister and free up a port when the device goes away
- */
-static void ifx_spi_free_port(struct ifx_spi_device *ifx_dev)
-{
-	if (ifx_dev->tty_dev)
-		tty_unregister_device(tty_drv, ifx_dev->minor);
-	kfifo_free(&ifx_dev->tx_fifo);
-}
-
-/**
- *	ifx_spi_create_port	-	create a new port
- *	@ifx_dev: our spi device
- *
- *	Allocate and initialise the tty port that goes with this interface
- *	and add it to the tty layer so that it can be opened.
- */
-static int ifx_spi_create_port(struct ifx_spi_device *ifx_dev)
-{
-	int ret = 0;
-	struct tty_port *pport = &ifx_dev->tty_port;
-
-	spin_lock_init(&ifx_dev->fifo_lock);
-	lockdep_set_class_and_subclass(&ifx_dev->fifo_lock,
-		&ifx_spi_key, 0);
-
-	if (kfifo_alloc(&ifx_dev->tx_fifo, IFX_SPI_FIFO_SIZE, GFP_KERNEL)) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	pport->ops = &ifx_tty_port_ops;
-	tty_port_init(pport);
-	ifx_dev->minor = IFX_SPI_TTY_ID;
-	ifx_dev->tty_dev = tty_register_device(tty_drv, ifx_dev->minor,
-					       &ifx_dev->spi_dev->dev);
-	if (IS_ERR(ifx_dev->tty_dev)) {
-		dev_dbg(&ifx_dev->spi_dev->dev,
-			"%s: registering tty device failed", __func__);
-		ret = PTR_ERR(ifx_dev->tty_dev);
-		goto error_ret;
-	}
-	return 0;
-
-error_ret:
-	ifx_spi_free_port(ifx_dev);
-	return ret;
-}
-
-/**
- *	ifx_spi_handle_srdy		-	handle SRDY
- *	@ifx_dev: device asserting SRDY
- *
- *	Check our device state and see what we need to kick off when SRDY
- *	is asserted. This usually means killing the timer and firing off the
- *	I/O processing.
- */
-static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev)
-{
-	if (test_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags)) {
-		del_timer_sync(&ifx_dev->spi_timer);
-		clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
-	}
-
-	ifx_spi_power_state_set(ifx_dev, IFX_SPI_POWER_SRDY);
-
-	if (!test_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags))
-		tasklet_schedule(&ifx_dev->io_work_tasklet);
-	else
-		set_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags);
-}
-
-/**
- *	ifx_spi_srdy_interrupt	-	SRDY asserted
- *	@irq: our IRQ number
- *	@dev: our ifx device
- *
- *	The modem asserted SRDY. Handle the srdy event
- */
-static irqreturn_t ifx_spi_srdy_interrupt(int irq, void *dev)
-{
-	struct ifx_spi_device *ifx_dev = dev;
-	ifx_dev->gpio.unack_srdy_int_nb++;
-	ifx_spi_handle_srdy(ifx_dev);
-	return IRQ_HANDLED;
-}
-
-/**
- *	ifx_spi_reset_interrupt	-	Modem has changed reset state
- *	@irq: interrupt number
- *	@dev: our device pointer
- *
- *	The modem has either entered or left reset state. Check the GPIO
- *	line to see which.
- *
- *	FIXME: review locking on MR_INPROGRESS versus
- *	parallel unsolicited reset/solicited reset
- */
-static irqreturn_t ifx_spi_reset_interrupt(int irq, void *dev)
-{
-	struct ifx_spi_device *ifx_dev = dev;
-	int val = gpio_get_value(ifx_dev->gpio.reset_out);
-	int solreset = test_bit(MR_START, &ifx_dev->mdm_reset_state);
-
-	if (val == 0) {
-		/* entered reset */
-		set_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state);
-		if (!solreset) {
-			/* unsolicited reset  */
-			ifx_spi_ttyhangup(ifx_dev);
-		}
-	} else {
-		/* exited reset */
-		clear_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state);
-		if (solreset) {
-			set_bit(MR_COMPLETE, &ifx_dev->mdm_reset_state);
-			wake_up(&ifx_dev->mdm_reset_wait);
-		}
-	}
-	return IRQ_HANDLED;
-}
-
-/**
- *	ifx_spi_free_device - free device
- *	@ifx_dev: device to free
- *
- *	Free the IFX device
- */
-static void ifx_spi_free_device(struct ifx_spi_device *ifx_dev)
-{
-	ifx_spi_free_port(ifx_dev);
-	dma_free_coherent(&ifx_dev->spi_dev->dev,
-				IFX_SPI_TRANSFER_SIZE,
-				ifx_dev->tx_buffer,
-				ifx_dev->tx_bus);
-	dma_free_coherent(&ifx_dev->spi_dev->dev,
-				IFX_SPI_TRANSFER_SIZE,
-				ifx_dev->rx_buffer,
-				ifx_dev->rx_bus);
-}
-
-/**
- *	ifx_spi_reset	-	reset modem
- *	@ifx_dev: modem to reset
- *
- *	Perform a reset on the modem
- */
-static int ifx_spi_reset(struct ifx_spi_device *ifx_dev)
-{
-	int ret;
-	/*
-	 * set up modem power, reset
-	 *
-	 * delays are required on some platforms for the modem
-	 * to reset properly
-	 */
-	set_bit(MR_START, &ifx_dev->mdm_reset_state);
-	gpio_set_value(ifx_dev->gpio.po, 0);
-	gpio_set_value(ifx_dev->gpio.reset, 0);
-	msleep(25);
-	gpio_set_value(ifx_dev->gpio.reset, 1);
-	msleep(1);
-	gpio_set_value(ifx_dev->gpio.po, 1);
-	msleep(1);
-	gpio_set_value(ifx_dev->gpio.po, 0);
-	ret = wait_event_timeout(ifx_dev->mdm_reset_wait,
-				 test_bit(MR_COMPLETE,
-					  &ifx_dev->mdm_reset_state),
-				 IFX_RESET_TIMEOUT);
-	if (!ret)
-		dev_warn(&ifx_dev->spi_dev->dev, "Modem reset timeout: (state:%lx)",
-			 ifx_dev->mdm_reset_state);
-
-	ifx_dev->mdm_reset_state = 0;
-	return ret;
-}
-
-/**
- *	ifx_spi_spi_probe	-	probe callback
- *	@spi: our possible matching SPI device
- *
- *	Probe for a 6x60 modem on SPI bus. Perform any needed device and
- *	GPIO setup.
- *
- *	FIXME:
- *	-	Support for multiple devices
- *	-	Split out MID specific GPIO handling eventually
- */
-
-static int ifx_spi_spi_probe(struct spi_device *spi)
-{
-	int ret;
-	int srdy;
-	struct ifx_modem_platform_data *pl_data = NULL;
-	struct ifx_spi_device *ifx_dev;
-
-	if (saved_ifx_dev) {
-		dev_dbg(&spi->dev, "ignoring subsequent detection");
-		return -ENODEV;
-	}
-
-	/* initialize structure to hold our device variables */
-	ifx_dev = kzalloc(sizeof(struct ifx_spi_device), GFP_KERNEL);
-	if (!ifx_dev) {
-		dev_err(&spi->dev, "spi device allocation failed");
-		return -ENOMEM;
-	}
-	saved_ifx_dev = ifx_dev;
-	ifx_dev->spi_dev = spi;
-	clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags);
-	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;
-	ifx_dev->is_6160 = pl_data->is_6160;
-
-	/* ensure SPI protocol flags are initialized to enable transfer */
-	ifx_dev->spi_more = 0;
-	ifx_dev->spi_slave_cts = 0;
-
-	/*initialize transfer and dma buffers */
-	ifx_dev->tx_buffer = dma_alloc_coherent(&ifx_dev->spi_dev->dev,
-				IFX_SPI_TRANSFER_SIZE,
-				&ifx_dev->tx_bus,
-				GFP_KERNEL);
-	if (!ifx_dev->tx_buffer) {
-		dev_err(&spi->dev, "DMA-TX buffer allocation failed");
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ifx_dev->rx_buffer = dma_alloc_coherent(&ifx_dev->spi_dev->dev,
-				IFX_SPI_TRANSFER_SIZE,
-				&ifx_dev->rx_bus,
-				GFP_KERNEL);
-	if (!ifx_dev->rx_buffer) {
-		dev_err(&spi->dev, "DMA-RX buffer allocation failed");
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	/* initialize waitq for modem reset */
-	init_waitqueue_head(&ifx_dev->mdm_reset_wait);
-
-	spi_set_drvdata(spi, ifx_dev);
-	tasklet_init(&ifx_dev->io_work_tasklet, ifx_spi_io,
-						(unsigned long)ifx_dev);
-
-	set_bit(IFX_SPI_STATE_PRESENT, &ifx_dev->flags);
-
-	/* create our tty port */
-	ret = ifx_spi_create_port(ifx_dev);
-	if (ret != 0) {
-		dev_err(&spi->dev, "create default tty port failed");
-		goto error_ret;
-	}
-
-	pl_data = (struct ifx_modem_platform_data *)spi->dev.platform_data;
-	if (pl_data) {
-		ifx_dev->gpio.reset = pl_data->rst_pmu;
-		ifx_dev->gpio.po = pl_data->pwr_on;
-		ifx_dev->gpio.mrdy = pl_data->mrdy;
-		ifx_dev->gpio.srdy = pl_data->srdy;
-		ifx_dev->gpio.reset_out = pl_data->rst_out;
-	} else {
-		dev_err(&spi->dev, "missing platform data!");
-		ret = -ENODEV;
-		goto error_ret;
-	}
-
-	dev_info(&spi->dev, "gpios %d, %d, %d, %d, %d",
-		 ifx_dev->gpio.reset, ifx_dev->gpio.po, ifx_dev->gpio.mrdy,
-		 ifx_dev->gpio.srdy, ifx_dev->gpio.reset_out);
-
-	/* Configure gpios */
-	ret = gpio_request(ifx_dev->gpio.reset, "ifxModem");
-	if (ret < 0) {
-		dev_err(&spi->dev, "Unable to allocate GPIO%d (RESET)",
-			ifx_dev->gpio.reset);
-		goto error_ret;
-	}
-	ret += gpio_direction_output(ifx_dev->gpio.reset, 0);
-	ret += gpio_export(ifx_dev->gpio.reset, 1);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to configure GPIO%d (RESET)",
-			ifx_dev->gpio.reset);
-		ret = -EBUSY;
-		goto error_ret2;
-	}
-
-	ret = gpio_request(ifx_dev->gpio.po, "ifxModem");
-	ret += gpio_direction_output(ifx_dev->gpio.po, 0);
-	ret += gpio_export(ifx_dev->gpio.po, 1);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to configure GPIO%d (ON)",
-			ifx_dev->gpio.po);
-		ret = -EBUSY;
-		goto error_ret3;
-	}
-
-	ret = gpio_request(ifx_dev->gpio.mrdy, "ifxModem");
-	if (ret < 0) {
-		dev_err(&spi->dev, "Unable to allocate GPIO%d (MRDY)",
-			ifx_dev->gpio.mrdy);
-		goto error_ret3;
-	}
-	ret += gpio_export(ifx_dev->gpio.mrdy, 1);
-	ret += gpio_direction_output(ifx_dev->gpio.mrdy, 0);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to configure GPIO%d (MRDY)",
-			ifx_dev->gpio.mrdy);
-		ret = -EBUSY;
-		goto error_ret4;
-	}
-
-	ret = gpio_request(ifx_dev->gpio.srdy, "ifxModem");
-	if (ret < 0) {
-		dev_err(&spi->dev, "Unable to allocate GPIO%d (SRDY)",
-			ifx_dev->gpio.srdy);
-		ret = -EBUSY;
-		goto error_ret4;
-	}
-	ret += gpio_export(ifx_dev->gpio.srdy, 1);
-	ret += gpio_direction_input(ifx_dev->gpio.srdy);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to configure GPIO%d (SRDY)",
-			ifx_dev->gpio.srdy);
-		ret = -EBUSY;
-		goto error_ret5;
-	}
-
-	ret = gpio_request(ifx_dev->gpio.reset_out, "ifxModem");
-	if (ret < 0) {
-		dev_err(&spi->dev, "Unable to allocate GPIO%d (RESET_OUT)",
-			ifx_dev->gpio.reset_out);
-		goto error_ret5;
-	}
-	ret += gpio_export(ifx_dev->gpio.reset_out, 1);
-	ret += gpio_direction_input(ifx_dev->gpio.reset_out);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to configure GPIO%d (RESET_OUT)",
-			ifx_dev->gpio.reset_out);
-		ret = -EBUSY;
-		goto error_ret6;
-	}
-
-	ret = request_irq(gpio_to_irq(ifx_dev->gpio.reset_out),
-			  ifx_spi_reset_interrupt,
-			  IRQF_TRIGGER_RISING|IRQF_TRIGGER_FALLING, DRVNAME,
-		(void *)ifx_dev);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to get irq %x\n",
-			gpio_to_irq(ifx_dev->gpio.reset_out));
-		goto error_ret6;
-	}
-
-	ret = ifx_spi_reset(ifx_dev);
-
-	ret = request_irq(gpio_to_irq(ifx_dev->gpio.srdy),
-			  ifx_spi_srdy_interrupt,
-			  IRQF_TRIGGER_RISING, DRVNAME,
-			  (void *)ifx_dev);
-	if (ret) {
-		dev_err(&spi->dev, "Unable to get irq %x",
-			gpio_to_irq(ifx_dev->gpio.srdy));
-		goto error_ret7;
-	}
-
-	/* set pm runtime power state and register with power system */
-	pm_runtime_set_active(&spi->dev);
-	pm_runtime_enable(&spi->dev);
-
-	/* handle case that modem is already signaling SRDY */
-	/* no outgoing tty open at this point, this just satisfies the
-	 * modem's read and should reset communication properly
-	 */
-	srdy = gpio_get_value(ifx_dev->gpio.srdy);
-
-	if (srdy) {
-		mrdy_assert(ifx_dev);
-		ifx_spi_handle_srdy(ifx_dev);
-	} else
-		mrdy_set_low(ifx_dev);
-	return 0;
-
-error_ret7:
-	free_irq(gpio_to_irq(ifx_dev->gpio.reset_out), (void *)ifx_dev);
-error_ret6:
-	gpio_free(ifx_dev->gpio.srdy);
-error_ret5:
-	gpio_free(ifx_dev->gpio.mrdy);
-error_ret4:
-	gpio_free(ifx_dev->gpio.reset);
-error_ret3:
-	gpio_free(ifx_dev->gpio.po);
-error_ret2:
-	gpio_free(ifx_dev->gpio.reset_out);
-error_ret:
-	ifx_spi_free_device(ifx_dev);
-	saved_ifx_dev = NULL;
-	return ret;
-}
-
-/**
- *	ifx_spi_spi_remove	-	SPI device was removed
- *	@spi: SPI device
- *
- *	FIXME: We should be shutting the device down here not in
- *	the module unload path.
- */
-
-static int ifx_spi_spi_remove(struct spi_device *spi)
-{
-	struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi);
-	/* stop activity */
-	tasklet_kill(&ifx_dev->io_work_tasklet);
-	/* free irq */
-	free_irq(gpio_to_irq(ifx_dev->gpio.reset_out), (void *)ifx_dev);
-	free_irq(gpio_to_irq(ifx_dev->gpio.srdy), (void *)ifx_dev);
-
-	gpio_free(ifx_dev->gpio.srdy);
-	gpio_free(ifx_dev->gpio.mrdy);
-	gpio_free(ifx_dev->gpio.reset);
-	gpio_free(ifx_dev->gpio.po);
-	gpio_free(ifx_dev->gpio.reset_out);
-
-	/* free allocations */
-	ifx_spi_free_device(ifx_dev);
-
-	saved_ifx_dev = NULL;
-	return 0;
-}
-
-/**
- *	ifx_spi_spi_shutdown	-	called on SPI shutdown
- *	@spi: SPI device
- *
- *	No action needs to be taken here
- */
-
-static void ifx_spi_spi_shutdown(struct spi_device *spi)
-{
-}
-
-/*
- * various suspends and resumes have nothing to do
- * no hardware to save state for
- */
-
-/**
- *	ifx_spi_spi_suspend	-	suspend SPI on system suspend
- *	@dev: device being suspended
- *
- *	Suspend the SPI side. No action needed on Intel MID platforms, may
- *	need extending for other systems.
- */
-static int ifx_spi_spi_suspend(struct spi_device *spi, pm_message_t msg)
-{
-	return 0;
-}
-
-/**
- *	ifx_spi_spi_resume	-	resume SPI side on system resume
- *	@dev: device being suspended
- *
- *	Suspend the SPI side. No action needed on Intel MID platforms, may
- *	need extending for other systems.
- */
-static int ifx_spi_spi_resume(struct spi_device *spi)
-{
-	return 0;
-}
-
-/**
- *	ifx_spi_pm_suspend	-	suspend modem on system suspend
- *	@dev: device being suspended
- *
- *	Suspend the modem. No action needed on Intel MID platforms, may
- *	need extending for other systems.
- */
-static int ifx_spi_pm_suspend(struct device *dev)
-{
-	return 0;
-}
-
-/**
- *	ifx_spi_pm_resume	-	resume modem on system resume
- *	@dev: device being suspended
- *
- *	Allow the modem to resume. No action needed.
- *
- *	FIXME: do we need to reset anything here ?
- */
-static int ifx_spi_pm_resume(struct device *dev)
-{
-	return 0;
-}
-
-/**
- *	ifx_spi_pm_runtime_resume	-	suspend modem
- *	@dev: device being suspended
- *
- *	Allow the modem to resume. No action needed.
- */
-static int ifx_spi_pm_runtime_resume(struct device *dev)
-{
-	return 0;
-}
-
-/**
- *	ifx_spi_pm_runtime_suspend	-	suspend modem
- *	@dev: device being suspended
- *
- *	Allow the modem to suspend and thus suspend to continue up the
- *	device tree.
- */
-static int ifx_spi_pm_runtime_suspend(struct device *dev)
-{
-	return 0;
-}
-
-/**
- *	ifx_spi_pm_runtime_idle		-	check if modem idle
- *	@dev: our device
- *
- *	Check conditions and queue runtime suspend if idle.
- */
-static int ifx_spi_pm_runtime_idle(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi);
-
-	if (!ifx_dev->power_status)
-		pm_runtime_suspend(dev);
-
-	return 0;
-}
-
-static const struct dev_pm_ops ifx_spi_pm = {
-	.resume = ifx_spi_pm_resume,
-	.suspend = ifx_spi_pm_suspend,
-	.runtime_resume = ifx_spi_pm_runtime_resume,
-	.runtime_suspend = ifx_spi_pm_runtime_suspend,
-	.runtime_idle = ifx_spi_pm_runtime_idle
-};
-
-static const struct spi_device_id ifx_id_table[] = {
-	{"ifx6160", 0},
-	{"ifx6260", 0},
-	{ }
-};
-MODULE_DEVICE_TABLE(spi, ifx_id_table);
-
-/* spi operations */
-static const struct spi_driver ifx_spi_driver_6160 = {
-	.driver = {
-		.name = "ifx6160",
-		.bus = &spi_bus_type,
-		.pm = &ifx_spi_pm,
-		.owner = THIS_MODULE},
-	.probe = ifx_spi_spi_probe,
-	.shutdown = ifx_spi_spi_shutdown,
-	.remove = __devexit_p(ifx_spi_spi_remove),
-	.suspend = ifx_spi_spi_suspend,
-	.resume = ifx_spi_spi_resume,
-	.id_table = ifx_id_table
-};
-
-/**
- *	ifx_spi_exit	-	module exit
- *
- *	Unload the module.
- */
-
-static void __exit ifx_spi_exit(void)
-{
-	/* unregister */
-	tty_unregister_driver(tty_drv);
-	spi_unregister_driver((void *)&ifx_spi_driver_6160);
-}
-
-/**
- *	ifx_spi_init		-	module entry point
- *
- *	Initialise the SPI and tty interfaces for the IFX SPI driver
- *	We need to initialize upper-edge spi driver after the tty
- *	driver because otherwise the spi probe will race
- */
-
-static int __init ifx_spi_init(void)
-{
-	int result;
-
-	tty_drv = alloc_tty_driver(1);
-	if (!tty_drv) {
-		pr_err("%s: alloc_tty_driver failed", DRVNAME);
-		return -ENOMEM;
-	}
-
-	tty_drv->magic = TTY_DRIVER_MAGIC;
-	tty_drv->owner = THIS_MODULE;
-	tty_drv->driver_name = DRVNAME;
-	tty_drv->name = TTYNAME;
-	tty_drv->minor_start = IFX_SPI_TTY_ID;
-	tty_drv->num = 1;
-	tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
-	tty_drv->subtype = SERIAL_TYPE_NORMAL;
-	tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-	tty_drv->init_termios = tty_std_termios;
-
-	tty_set_operations(tty_drv, &ifx_spi_serial_ops);
-
-	result = tty_register_driver(tty_drv);
-	if (result) {
-		pr_err("%s: tty_register_driver failed(%d)",
-			DRVNAME, result);
-		put_tty_driver(tty_drv);
-		return result;
-	}
-
-	result = spi_register_driver((void *)&ifx_spi_driver_6160);
-	if (result) {
-		pr_err("%s: spi_register_driver failed(%d)",
-			DRVNAME, result);
-		tty_unregister_driver(tty_drv);
-	}
-	return result;
-}
-
-module_init(ifx_spi_init);
-module_exit(ifx_spi_exit);
-
-MODULE_AUTHOR("Intel");
-MODULE_DESCRIPTION("IFX6x60 spi driver");
-MODULE_LICENSE("GPL");
-MODULE_INFO(Version, "0.1-IFX6x60");