Merge commit 'origin/master' into for-linus/xen/master

* commit 'origin/master': (4825 commits)
  Fix build errors due to CONFIG_BRANCH_TRACER=y
  parport: Use the PCI IRQ if offered
  tty: jsm cleanups
  Adjust path to gpio headers
  KGDB_SERIAL_CONSOLE check for module
  Change KCONFIG name
  tty: Blackin CTS/RTS
  Change hardware flow control from poll to interrupt driven
  Add support for the MAX3100 SPI UART.
  lanana: assign a device name and numbering for MAX3100
  serqt: initial clean up pass for tty side
  tty: Use the generic RS485 ioctl on CRIS
  tty: Correct inline types for tty_driver_kref_get()
  splice: fix deadlock in splicing to file
  nilfs2: support nanosecond timestamp
  nilfs2: introduce secondary super block
  nilfs2: simplify handling of active state of segments
  nilfs2: mark minor flag for checkpoint created by internal operation
  nilfs2: clean up sketch file
  nilfs2: super block operations fix endian bug
  ...

Conflicts:
	arch/x86/include/asm/thread_info.h
	arch/x86/lguest/boot.c
	drivers/xen/manage.c

8 files changed, 785 insertions, 201 deletions

diff --git a/arch/powerpc/platforms/52xx/Kconfig b/arch/powerpc/platforms/52xx/Kconfig
index 696a5ee4962d..8b8e9560a315 100644
--- a/arch/powerpc/platforms/52xx/Kconfig
+++ b/arch/powerpc/platforms/52xx/Kconfig
@@ -1,6 +1,6 @@
 config PPC_MPC52xx
 	bool "52xx-based boards"
-	depends on PPC_MULTIPLATFORM && PPC32
+	depends on 6xx
 	select PPC_CLOCK
 	select PPC_PCI_CHOICE
 
@@ -21,7 +21,13 @@ config PPC_MPC5200_SIMPLE
 	    and if there is a PCI bus node defined in the device tree.
 
 	  Boards that are compatible with this generic platform support
-	  are: 'tqc,tqm5200', 'promess,motionpro', 'schindler,cm5200'.
+	  are:
+	     intercontrol,digsy-mtc
+	     phytec,pcm030
+	     phytec,pcm032
+	     promess,motionpro
+	     schindler,cm5200
+	     tqc,tqm5200
 
 config PPC_EFIKA
 	bool "bPlan Efika 5k2. MPC5200B based computer"
@@ -35,6 +41,11 @@ config PPC_LITE5200
 	depends on PPC_MPC52xx
 	select DEFAULT_UIMAGE
 
+config PPC_MEDIA5200
+	bool "Freescale Media5200 Eval Board"
+	depends on PPC_MPC52xx
+	select DEFAULT_UIMAGE
+
 config PPC_MPC5200_BUGFIX
 	bool "MPC5200 (L25R) bugfix support"
 	depends on PPC_MPC52xx
diff --git a/arch/powerpc/platforms/52xx/Makefile b/arch/powerpc/platforms/52xx/Makefile
index b8a52062738a..bfd4f52cf3dd 100644
--- a/arch/powerpc/platforms/52xx/Makefile
+++ b/arch/powerpc/platforms/52xx/Makefile
@@ -1,12 +1,13 @@
 #
 # Makefile for 52xx based boards
 #
-obj-y				+= mpc52xx_pic.o mpc52xx_common.o
+obj-y				+= mpc52xx_pic.o mpc52xx_common.o mpc52xx_gpt.o
 obj-$(CONFIG_PCI)		+= mpc52xx_pci.o
 
 obj-$(CONFIG_PPC_MPC5200_SIMPLE) += mpc5200_simple.o
 obj-$(CONFIG_PPC_EFIKA)		+= efika.o
 obj-$(CONFIG_PPC_LITE5200)	+= lite5200.o
+obj-$(CONFIG_PPC_MEDIA5200)	+= media5200.o
 
 obj-$(CONFIG_PM)		+= mpc52xx_sleep.o mpc52xx_pm.o
 ifeq ($(CONFIG_PPC_LITE5200),y)
diff --git a/arch/powerpc/platforms/52xx/media5200.c b/arch/powerpc/platforms/52xx/media5200.c
new file mode 100644
index 000000000000..68e4f1696d14
--- /dev/null
+++ b/arch/powerpc/platforms/52xx/media5200.c
@@ -0,0 +1,273 @@
+/*
+ * Support for 'media5200-platform' compatible boards.
+ *
+ * Copyright (C) 2008 Secret Lab Technologies 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.
+ *
+ * Description:
+ * This code implements support for the Freescape Media5200 platform
+ * (built around the MPC5200 SoC).
+ *
+ * Notable characteristic of the Media5200 is the presence of an FPGA
+ * that has all external IRQ lines routed through it.  This file implements
+ * a cascaded interrupt controller driver which attaches itself to the
+ * Virtual IRQ subsystem after the primary mpc5200 interrupt controller
+ * is initialized.
+ *
+ */
+
+#undef DEBUG
+
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <asm/time.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/mpc52xx.h>
+
+static struct of_device_id mpc5200_gpio_ids[] __initdata = {
+	{ .compatible = "fsl,mpc5200-gpio", },
+	{ .compatible = "mpc5200-gpio", },
+	{}
+};
+
+/* FPGA register set */
+#define MEDIA5200_IRQ_ENABLE (0x40c)
+#define MEDIA5200_IRQ_STATUS (0x410)
+#define MEDIA5200_NUM_IRQS   (6)
+#define MEDIA5200_IRQ_SHIFT  (32 - MEDIA5200_NUM_IRQS)
+
+struct media5200_irq {
+	void __iomem *regs;
+	spinlock_t lock;
+	struct irq_host *irqhost;
+};
+struct media5200_irq media5200_irq;
+
+static void media5200_irq_unmask(unsigned int virq)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&media5200_irq.lock, flags);
+	val = in_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE);
+	val |= 1 << (MEDIA5200_IRQ_SHIFT + irq_map[virq].hwirq);
+	out_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE, val);
+	spin_unlock_irqrestore(&media5200_irq.lock, flags);
+}
+
+static void media5200_irq_mask(unsigned int virq)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&media5200_irq.lock, flags);
+	val = in_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE);
+	val &= ~(1 << (MEDIA5200_IRQ_SHIFT + irq_map[virq].hwirq));
+	out_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE, val);
+	spin_unlock_irqrestore(&media5200_irq.lock, flags);
+}
+
+static struct irq_chip media5200_irq_chip = {
+	.typename = "Media5200 FPGA",
+	.unmask = media5200_irq_unmask,
+	.mask = media5200_irq_mask,
+	.mask_ack = media5200_irq_mask,
+};
+
+void media5200_irq_cascade(unsigned int virq, struct irq_desc *desc)
+{
+	int sub_virq, val;
+	u32 status, enable;
+
+	/* Mask off the cascaded IRQ */
+	spin_lock(&desc->lock);
+	desc->chip->mask(virq);
+	spin_unlock(&desc->lock);
+
+	/* Ask the FPGA for IRQ status.  If 'val' is 0, then no irqs
+	 * are pending.  'ffs()' is 1 based */
+	status = in_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE);
+	enable = in_be32(media5200_irq.regs + MEDIA5200_IRQ_STATUS);
+	val = ffs((status & enable) >> MEDIA5200_IRQ_SHIFT);
+	if (val) {
+		sub_virq = irq_linear_revmap(media5200_irq.irqhost, val - 1);
+		/* pr_debug("%s: virq=%i s=%.8x e=%.8x hwirq=%i subvirq=%i\n",
+		 *          __func__, virq, status, enable, val - 1, sub_virq);
+		 */
+		generic_handle_irq(sub_virq);
+	}
+
+	/* Processing done; can reenable the cascade now */
+	spin_lock(&desc->lock);
+	desc->chip->ack(virq);
+	if (!(desc->status & IRQ_DISABLED))
+		desc->chip->unmask(virq);
+	spin_unlock(&desc->lock);
+}
+
+static int media5200_irq_map(struct irq_host *h, unsigned int virq,
+			     irq_hw_number_t hw)
+{
+	struct irq_desc *desc = get_irq_desc(virq);
+
+	pr_debug("%s: h=%p, virq=%i, hwirq=%i\n", __func__, h, virq, (int)hw);
+	set_irq_chip_data(virq, &media5200_irq);
+	set_irq_chip_and_handler(virq, &media5200_irq_chip, handle_level_irq);
+	set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
+	desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
+	desc->status |= IRQ_TYPE_LEVEL_LOW | IRQ_LEVEL;
+
+	return 0;
+}
+
+static int media5200_irq_xlate(struct irq_host *h, struct device_node *ct,
+				 u32 *intspec, unsigned int intsize,
+				 irq_hw_number_t *out_hwirq,
+				 unsigned int *out_flags)
+{
+	if (intsize != 2)
+		return -1;
+
+	pr_debug("%s: bank=%i, number=%i\n", __func__, intspec[0], intspec[1]);
+	*out_hwirq = intspec[1];
+	*out_flags = IRQ_TYPE_NONE;
+	return 0;
+}
+
+static struct irq_host_ops media5200_irq_ops = {
+	.map = media5200_irq_map,
+	.xlate = media5200_irq_xlate,
+};
+
+/*
+ * Setup Media5200 IRQ mapping
+ */
+static void __init media5200_init_irq(void)
+{
+	struct device_node *fpga_np;
+	int cascade_virq;
+
+	/* First setup the regular MPC5200 interrupt controller */
+	mpc52xx_init_irq();
+
+	/* Now find the FPGA IRQ */
+	fpga_np = of_find_compatible_node(NULL, NULL, "fsl,media5200-fpga");
+	if (!fpga_np)
+		goto out;
+	pr_debug("%s: found fpga node: %s\n", __func__, fpga_np->full_name);
+
+	media5200_irq.regs = of_iomap(fpga_np, 0);
+	if (!media5200_irq.regs)
+		goto out;
+	pr_debug("%s: mapped to %p\n", __func__, media5200_irq.regs);
+
+	cascade_virq = irq_of_parse_and_map(fpga_np, 0);
+	if (!cascade_virq)
+		goto out;
+	pr_debug("%s: cascaded on virq=%i\n", __func__, cascade_virq);
+
+	/* Disable all FPGA IRQs */
+	out_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE, 0);
+
+	spin_lock_init(&media5200_irq.lock);
+
+	media5200_irq.irqhost = irq_alloc_host(fpga_np, IRQ_HOST_MAP_LINEAR,
+					       MEDIA5200_NUM_IRQS,
+					       &media5200_irq_ops, -1);
+	if (!media5200_irq.irqhost)
+		goto out;
+	pr_debug("%s: allocated irqhost\n", __func__);
+
+	media5200_irq.irqhost->host_data = &media5200_irq;
+
+	set_irq_data(cascade_virq, &media5200_irq);
+	set_irq_chained_handler(cascade_virq, media5200_irq_cascade);
+
+	return;
+
+ out:
+	pr_err("Could not find Media5200 FPGA; PCI interrupts will not work\n");
+}
+
+/*
+ * Setup the architecture
+ */
+static void __init media5200_setup_arch(void)
+{
+
+	struct device_node *np;
+	struct mpc52xx_gpio __iomem *gpio;
+	u32 port_config;
+
+	if (ppc_md.progress)
+		ppc_md.progress("media5200_setup_arch()", 0);
+
+	/* Map important registers from the internal memory map */
+	mpc52xx_map_common_devices();
+
+	/* Some mpc5200 & mpc5200b related configuration */
+	mpc5200_setup_xlb_arbiter();
+
+	mpc52xx_setup_pci();
+
+	np = of_find_matching_node(NULL, mpc5200_gpio_ids);
+	gpio = of_iomap(np, 0);
+	of_node_put(np);
+	if (!gpio) {
+		printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
+		       __func__);
+		return;
+	}
+
+	/* Set port config */
+	port_config = in_be32(&gpio->port_config);
+
+	port_config &= ~0x03000000;	/* ATA CS is on csb_4/5		*/
+	port_config |=  0x01000000;
+
+	out_be32(&gpio->port_config, port_config);
+
+	/* Unmap zone */
+	iounmap(gpio);
+
+}
+
+/* list of the supported boards */
+static char *board[] __initdata = {
+	"fsl,media5200",
+	NULL
+};
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init media5200_probe(void)
+{
+	unsigned long node = of_get_flat_dt_root();
+	int i = 0;
+
+	while (board[i]) {
+		if (of_flat_dt_is_compatible(node, board[i]))
+			break;
+		i++;
+	}
+
+	return (board[i] != NULL);
+}
+
+define_machine(media5200_platform) {
+	.name		= "media5200-platform",
+	.probe		= media5200_probe,
+	.setup_arch	= media5200_setup_arch,
+	.init		= mpc52xx_declare_of_platform_devices,
+	.init_IRQ	= media5200_init_irq,
+	.get_irq	= mpc52xx_get_irq,
+	.restart	= mpc52xx_restart,
+	.calibrate_decr	= generic_calibrate_decr,
+};
diff --git a/arch/powerpc/platforms/52xx/mpc5200_simple.c b/arch/powerpc/platforms/52xx/mpc5200_simple.c
index a3bda0b9f1ff..c31e5b534f0a 100644
--- a/arch/powerpc/platforms/52xx/mpc5200_simple.c
+++ b/arch/powerpc/platforms/52xx/mpc5200_simple.c
@@ -50,8 +50,10 @@ static void __init mpc5200_simple_setup_arch(void)
 
 /* list of the supported boards */
 static char *board[] __initdata = {
-	"promess,motionpro",
+	"intercontrol,digsy-mtc",
 	"phytec,pcm030",
+	"phytec,pcm032",
+	"promess,motionpro",
 	"schindler,cm5200",
 	"tqc,tqm5200",
 	NULL
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c
index 98367a0255f3..8e3dd5a0f228 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_common.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c
@@ -28,9 +28,10 @@ static struct of_device_id mpc52xx_xlb_ids[] __initdata = {
 static struct of_device_id mpc52xx_bus_ids[] __initdata = {
 	{ .compatible = "fsl,mpc5200-immr", },
 	{ .compatible = "fsl,mpc5200b-immr", },
-	{ .compatible = "fsl,lpb", },
+	{ .compatible = "simple-bus", },
 
 	/* depreciated matches; shouldn't be used in new device trees */
+	{ .compatible = "fsl,lpb", },
 	{ .type = "builtin", .compatible = "mpc5200", }, /* efika */
 	{ .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
 	{}
@@ -205,6 +206,43 @@ int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv)
 EXPORT_SYMBOL(mpc52xx_set_psc_clkdiv);
 
 /**
+ * mpc52xx_get_xtal_freq - Get SYS_XTAL_IN frequency for a device
+ *
+ * @node: device node
+ *
+ * Returns the frequency of the external oscillator clock connected
+ * to the SYS_XTAL_IN pin, or 0 if it cannot be determined.
+ */
+unsigned int mpc52xx_get_xtal_freq(struct device_node *node)
+{
+	u32 val;
+	unsigned int freq;
+
+	if (!mpc52xx_cdm)
+		return 0;
+
+	freq = mpc52xx_find_ipb_freq(node);
+	if (!freq)
+		return 0;
+
+	if (in_8(&mpc52xx_cdm->ipb_clk_sel) & 0x1)
+		freq *= 2;
+
+	val  = in_be32(&mpc52xx_cdm->rstcfg);
+	if (val & (1 << 5))
+		freq *= 8;
+	else
+		freq *= 4;
+	if (val & (1 << 6))
+		freq /= 12;
+	else
+		freq /= 16;
+
+	return freq;
+}
+EXPORT_SYMBOL(mpc52xx_get_xtal_freq);
+
+/**
  * mpc52xx_restart: ppc_md->restart hook for mpc5200 using the watchdog timer
  */
 void
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpio.c b/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
index 07f89ae46d04..2b8d8ef32e4e 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
@@ -354,88 +354,6 @@ static struct of_platform_driver mpc52xx_simple_gpiochip_driver = {
 	.remove = mpc52xx_gpiochip_remove,
 };
 
-/*
- * GPIO LIB API implementation for gpt GPIOs.
- *
- * Each gpt only has a single GPIO.
- */
-static int mpc52xx_gpt_gpio_get(struct gpio_chip *gc, unsigned int gpio)
-{
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-	struct mpc52xx_gpt __iomem *regs = mm_gc->regs;
-
-	return (in_be32(&regs->status) & (1 << (31 - 23))) ? 1 : 0;
-}
-
-static void
-mpc52xx_gpt_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-	struct mpc52xx_gpt __iomem *regs = mm_gc->regs;
-
-	if (val)
-		out_be32(&regs->mode, 0x34);
-	else
-		out_be32(&regs->mode, 0x24);
-
-	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
-}
-
-static int mpc52xx_gpt_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
-{
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-	struct mpc52xx_gpt __iomem *regs = mm_gc->regs;
-
-	out_be32(&regs->mode, 0x04);
-
-	return 0;
-}
-
-static int
-mpc52xx_gpt_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	mpc52xx_gpt_gpio_set(gc, gpio, val);
-	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
-
-	return 0;
-}
-
-static int __devinit mpc52xx_gpt_gpiochip_probe(struct of_device *ofdev,
-					const struct of_device_id *match)
-{
-	struct of_mm_gpio_chip *mmchip;
-	struct of_gpio_chip *chip;
-
-	mmchip = kzalloc(sizeof(*mmchip), GFP_KERNEL);
-	if (!mmchip)
-		return -ENOMEM;
-
-	chip = &mmchip->of_gc;
-
-	chip->gpio_cells          = 2;
-	chip->gc.ngpio            = 1;
-	chip->gc.direction_input  = mpc52xx_gpt_gpio_dir_in;
-	chip->gc.direction_output = mpc52xx_gpt_gpio_dir_out;
-	chip->gc.get              = mpc52xx_gpt_gpio_get;
-	chip->gc.set              = mpc52xx_gpt_gpio_set;
-
-	return of_mm_gpiochip_add(ofdev->node, mmchip);
-}
-
-static const struct of_device_id mpc52xx_gpt_gpiochip_match[] = {
-	{
-		.compatible = "fsl,mpc5200-gpt-gpio",
-	},
-	{}
-};
-
-static struct of_platform_driver mpc52xx_gpt_gpiochip_driver = {
-	.name = "gpio_gpt",
-	.match_table = mpc52xx_gpt_gpiochip_match,
-	.probe = mpc52xx_gpt_gpiochip_probe,
-	.remove = mpc52xx_gpiochip_remove,
-};
-
 static int __init mpc52xx_gpio_init(void)
 {
 	if (of_register_platform_driver(&mpc52xx_wkup_gpiochip_driver))
@@ -444,9 +362,6 @@ static int __init mpc52xx_gpio_init(void)
 	if (of_register_platform_driver(&mpc52xx_simple_gpiochip_driver))
 		printk(KERN_ERR "Unable to register simple GPIO driver\n");
 
-	if (of_register_platform_driver(&mpc52xx_gpt_gpiochip_driver))
-		printk(KERN_ERR "Unable to register gpt GPIO driver\n");
-
 	return 0;
 }
 
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
new file mode 100644
index 000000000000..bfbcd418e690
--- /dev/null
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
@@ -0,0 +1,396 @@
+/*
+ * MPC5200 General Purpose Timer device driver
+ *
+ * Copyright (c) 2009 Secret Lab Technologies Ltd.
+ * Copyright (c) 2008 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 as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This file is a driver for the the General Purpose Timer (gpt) devices
+ * found on the MPC5200 SoC.  Each timer has an IO pin which can be used
+ * for GPIO or can be used to raise interrupts.  The timer function can
+ * be used independently from the IO pin, or it can be used to control
+ * output signals or measure input signals.
+ *
+ * This driver supports the GPIO and IRQ controller functions of the GPT
+ * device.  Timer functions are not yet supported, nor is the watchdog
+ * timer.
+ *
+ * To use the GPIO function, the following two properties must be added
+ * to the device tree node for the gpt device (typically in the .dts file
+ * for the board):
+ * 	gpio-controller;
+ * 	#gpio-cells = < 2 >;
+ * This driver will register the GPIO pin if it finds the gpio-controller
+ * property in the device tree.
+ *
+ * To use the IRQ controller function, the following two properties must
+ * be added to the device tree node for the gpt device:
+ * 	interrupt-controller;
+ * 	#interrupt-cells = < 1 >;
+ * The IRQ controller binding only uses one cell to specify the interrupt,
+ * and the IRQ flags are encoded in the cell.  A cell is not used to encode
+ * the IRQ number because the GPT only has a single IRQ source.  For flags,
+ * a value of '1' means rising edge sensitive and '2' means falling edge.
+ *
+ * The GPIO and the IRQ controller functions can be used at the same time,
+ * but in this use case the IO line will only work as an input.  Trying to
+ * use it as a GPIO output will not work.
+ *
+ * When using the GPIO line as an output, it can either be driven as normal
+ * IO, or it can be an Open Collector (OC) output.  At the moment it is the
+ * responsibility of either the bootloader or the platform setup code to set
+ * the output mode.  This driver does not change the output mode setting.
+ */
+
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/kernel.h>
+#include <asm/mpc52xx.h>
+
+MODULE_DESCRIPTION("Freescale MPC52xx gpt driver");
+MODULE_AUTHOR("Sascha Hauer, Grant Likely");
+MODULE_LICENSE("GPL");
+
+/**
+ * struct mpc52xx_gpt - Private data structure for MPC52xx GPT driver
+ * @dev: pointer to device structure
+ * @regs: virtual address of GPT registers
+ * @lock: spinlock to coordinate between different functions.
+ * @of_gc: of_gpio_chip instance structure; used when GPIO is enabled
+ * @irqhost: Pointer to irq_host instance; used when IRQ mode is supported
+ */
+struct mpc52xx_gpt_priv {
+	struct device *dev;
+	struct mpc52xx_gpt __iomem *regs;
+	spinlock_t lock;
+	struct irq_host *irqhost;
+
+#if defined(CONFIG_GPIOLIB)
+	struct of_gpio_chip of_gc;
+#endif
+};
+
+#define MPC52xx_GPT_MODE_MS_MASK	(0x07)
+#define MPC52xx_GPT_MODE_MS_IC		(0x01)
+#define MPC52xx_GPT_MODE_MS_OC		(0x02)
+#define MPC52xx_GPT_MODE_MS_PWM		(0x03)
+#define MPC52xx_GPT_MODE_MS_GPIO	(0x04)
+
+#define MPC52xx_GPT_MODE_GPIO_MASK	(0x30)
+#define MPC52xx_GPT_MODE_GPIO_OUT_LOW	(0x20)
+#define MPC52xx_GPT_MODE_GPIO_OUT_HIGH	(0x30)
+
+#define MPC52xx_GPT_MODE_IRQ_EN		(0x0100)
+
+#define MPC52xx_GPT_MODE_ICT_MASK	(0x030000)
+#define MPC52xx_GPT_MODE_ICT_RISING	(0x010000)
+#define MPC52xx_GPT_MODE_ICT_FALLING	(0x020000)
+#define MPC52xx_GPT_MODE_ICT_TOGGLE	(0x030000)
+
+#define MPC52xx_GPT_STATUS_IRQMASK	(0x000f)
+
+/* ---------------------------------------------------------------------
+ * Cascaded interrupt controller hooks
+ */
+
+static void mpc52xx_gpt_irq_unmask(unsigned int virq)
+{
+	struct mpc52xx_gpt_priv *gpt = get_irq_chip_data(virq);
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpt->lock, flags);
+	setbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_IRQ_EN);
+	spin_unlock_irqrestore(&gpt->lock, flags);
+}
+
+static void mpc52xx_gpt_irq_mask(unsigned int virq)
+{
+	struct mpc52xx_gpt_priv *gpt = get_irq_chip_data(virq);
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpt->lock, flags);
+	clrbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_IRQ_EN);
+	spin_unlock_irqrestore(&gpt->lock, flags);
+}
+
+static void mpc52xx_gpt_irq_ack(unsigned int virq)
+{
+	struct mpc52xx_gpt_priv *gpt = get_irq_chip_data(virq);
+
+	out_be32(&gpt->regs->status, MPC52xx_GPT_STATUS_IRQMASK);
+}
+
+static int mpc52xx_gpt_irq_set_type(unsigned int virq, unsigned int flow_type)
+{
+	struct mpc52xx_gpt_priv *gpt = get_irq_chip_data(virq);
+	unsigned long flags;
+	u32 reg;
+
+	dev_dbg(gpt->dev, "%s: virq=%i type=%x\n", __func__, virq, flow_type);
+
+	spin_lock_irqsave(&gpt->lock, flags);
+	reg = in_be32(&gpt->regs->mode) & ~MPC52xx_GPT_MODE_ICT_MASK;
+	if (flow_type & IRQF_TRIGGER_RISING)
+		reg |= MPC52xx_GPT_MODE_ICT_RISING;
+	if (flow_type & IRQF_TRIGGER_FALLING)
+		reg |= MPC52xx_GPT_MODE_ICT_FALLING;
+	out_be32(&gpt->regs->mode, reg);
+	spin_unlock_irqrestore(&gpt->lock, flags);
+
+	return 0;
+}
+
+static struct irq_chip mpc52xx_gpt_irq_chip = {
+	.typename = "MPC52xx GPT",
+	.unmask = mpc52xx_gpt_irq_unmask,
+	.mask = mpc52xx_gpt_irq_mask,
+	.ack = mpc52xx_gpt_irq_ack,
+	.set_type = mpc52xx_gpt_irq_set_type,
+};
+
+void mpc52xx_gpt_irq_cascade(unsigned int virq, struct irq_desc *desc)
+{
+	struct mpc52xx_gpt_priv *gpt = get_irq_data(virq);
+	int sub_virq;
+	u32 status;
+
+	status = in_be32(&gpt->regs->status) & MPC52xx_GPT_STATUS_IRQMASK;
+	if (status) {
+		sub_virq = irq_linear_revmap(gpt->irqhost, 0);
+		generic_handle_irq(sub_virq);
+	}
+}
+
+static int mpc52xx_gpt_irq_map(struct irq_host *h, unsigned int virq,
+			       irq_hw_number_t hw)
+{
+	struct mpc52xx_gpt_priv *gpt = h->host_data;
+
+	dev_dbg(gpt->dev, "%s: h=%p, virq=%i\n", __func__, h, virq);
+	set_irq_chip_data(virq, gpt);
+	set_irq_chip_and_handler(virq, &mpc52xx_gpt_irq_chip, handle_edge_irq);
+
+	return 0;
+}
+
+static int mpc52xx_gpt_irq_xlate(struct irq_host *h, struct device_node *ct,
+				 u32 *intspec, unsigned int intsize,
+				 irq_hw_number_t *out_hwirq,
+				 unsigned int *out_flags)
+{
+	struct mpc52xx_gpt_priv *gpt = h->host_data;
+
+	dev_dbg(gpt->dev, "%s: flags=%i\n", __func__, intspec[0]);
+
+	if ((intsize < 1) || (intspec[0] < 1) || (intspec[0] > 3)) {
+		dev_err(gpt->dev, "bad irq specifier in %s\n", ct->full_name);
+		return -EINVAL;
+	}
+
+	*out_hwirq = 0; /* The GPT only has 1 IRQ line */
+	*out_flags = intspec[0];
+
+	return 0;
+}
+
+static struct irq_host_ops mpc52xx_gpt_irq_ops = {
+	.map = mpc52xx_gpt_irq_map,
+	.xlate = mpc52xx_gpt_irq_xlate,
+};
+
+static void
+mpc52xx_gpt_irq_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
+{
+	int cascade_virq;
+	unsigned long flags;
+
+	/* Only setup cascaded IRQ if device tree claims the GPT is
+	 * an interrupt controller */
+	if (!of_find_property(node, "interrupt-controller", NULL))
+		return;
+
+	cascade_virq = irq_of_parse_and_map(node, 0);
+
+	gpt->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR, 1,
+				      &mpc52xx_gpt_irq_ops, -1);
+	if (!gpt->irqhost) {
+		dev_err(gpt->dev, "irq_alloc_host() failed\n");
+		return;
+	}
+
+	gpt->irqhost->host_data = gpt;
+
+	set_irq_data(cascade_virq, gpt);
+	set_irq_chained_handler(cascade_virq, mpc52xx_gpt_irq_cascade);
+
+	/* Set to Input Capture mode */
+	spin_lock_irqsave(&gpt->lock, flags);
+	clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_MS_MASK,
+			MPC52xx_GPT_MODE_MS_IC);
+	spin_unlock_irqrestore(&gpt->lock, flags);
+
+	dev_dbg(gpt->dev, "%s() complete. virq=%i\n", __func__, cascade_virq);
+}
+
+
+/* ---------------------------------------------------------------------
+ * GPIOLIB hooks
+ */
+#if defined(CONFIG_GPIOLIB)
+static inline struct mpc52xx_gpt_priv *gc_to_mpc52xx_gpt(struct gpio_chip *gc)
+{
+	return container_of(to_of_gpio_chip(gc), struct mpc52xx_gpt_priv,of_gc);
+}
+
+static int mpc52xx_gpt_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+	struct mpc52xx_gpt_priv *gpt = gc_to_mpc52xx_gpt(gc);
+
+	return (in_be32(&gpt->regs->status) >> 8) & 1;
+}
+
+static void
+mpc52xx_gpt_gpio_set(struct gpio_chip *gc, unsigned int gpio, int v)
+{
+	struct mpc52xx_gpt_priv *gpt = gc_to_mpc52xx_gpt(gc);
+	unsigned long flags;
+	u32 r;
+
+	dev_dbg(gpt->dev, "%s: gpio:%d v:%d\n", __func__, gpio, v);
+	r = v ? MPC52xx_GPT_MODE_GPIO_OUT_HIGH : MPC52xx_GPT_MODE_GPIO_OUT_LOW;
+
+	spin_lock_irqsave(&gpt->lock, flags);
+	clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_GPIO_MASK, r);
+	spin_unlock_irqrestore(&gpt->lock, flags);
+}
+
+static int mpc52xx_gpt_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
+{
+	struct mpc52xx_gpt_priv *gpt = gc_to_mpc52xx_gpt(gc);
+	unsigned long flags;
+
+	dev_dbg(gpt->dev, "%s: gpio:%d\n", __func__, gpio);
+
+	spin_lock_irqsave(&gpt->lock, flags);
+	clrbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_GPIO_MASK);
+	spin_unlock_irqrestore(&gpt->lock, flags);
+
+	return 0;
+}
+
+static int
+mpc52xx_gpt_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+	mpc52xx_gpt_gpio_set(gc, gpio, val);
+	return 0;
+}
+
+static void
+mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
+{
+	int rc;
+
+	/* Only setup GPIO if the device tree claims the GPT is
+	 * a GPIO controller */
+	if (!of_find_property(node, "gpio-controller", NULL))
+		return;
+
+	gpt->of_gc.gc.label = kstrdup(node->full_name, GFP_KERNEL);
+	if (!gpt->of_gc.gc.label) {
+		dev_err(gpt->dev, "out of memory\n");
+		return;
+	}
+
+	gpt->of_gc.gpio_cells = 2;
+	gpt->of_gc.gc.ngpio = 1;
+	gpt->of_gc.gc.direction_input  = mpc52xx_gpt_gpio_dir_in;
+	gpt->of_gc.gc.direction_output = mpc52xx_gpt_gpio_dir_out;
+	gpt->of_gc.gc.get = mpc52xx_gpt_gpio_get;
+	gpt->of_gc.gc.set = mpc52xx_gpt_gpio_set;
+	gpt->of_gc.gc.base = -1;
+	gpt->of_gc.xlate = of_gpio_simple_xlate;
+	node->data = &gpt->of_gc;
+	of_node_get(node);
+
+	/* Setup external pin in GPIO mode */
+	clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_MS_MASK,
+			MPC52xx_GPT_MODE_MS_GPIO);
+
+	rc = gpiochip_add(&gpt->of_gc.gc);
+	if (rc)
+		dev_err(gpt->dev, "gpiochip_add() failed; rc=%i\n", rc);
+
+	dev_dbg(gpt->dev, "%s() complete.\n", __func__);
+}
+#else /* defined(CONFIG_GPIOLIB) */
+static void
+mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *p, struct device_node *np) { }
+#endif /* defined(CONFIG_GPIOLIB) */
+
+/* ---------------------------------------------------------------------
+ * of_platform bus binding code
+ */
+static int __devinit mpc52xx_gpt_probe(struct of_device *ofdev,
+				       const struct of_device_id *match)
+{
+	struct mpc52xx_gpt_priv *gpt;
+
+	gpt = kzalloc(sizeof *gpt, GFP_KERNEL);
+	if (!gpt)
+		return -ENOMEM;
+
+	spin_lock_init(&gpt->lock);
+	gpt->dev = &ofdev->dev;
+	gpt->regs = of_iomap(ofdev->node, 0);
+	if (!gpt->regs) {
+		kfree(gpt);
+		return -ENOMEM;
+	}
+
+	dev_set_drvdata(&ofdev->dev, gpt);
+
+	mpc52xx_gpt_gpio_setup(gpt, ofdev->node);
+	mpc52xx_gpt_irq_setup(gpt, ofdev->node);
+
+	return 0;
+}
+
+static int mpc52xx_gpt_remove(struct of_device *ofdev)
+{
+	return -EBUSY;
+}
+
+static const struct of_device_id mpc52xx_gpt_match[] = {
+	{ .compatible = "fsl,mpc5200-gpt", },
+
+	/* Depreciated compatible values; don't use for new dts files */
+	{ .compatible = "fsl,mpc5200-gpt-gpio", },
+	{ .compatible = "mpc5200-gpt", },
+	{}
+};
+
+static struct of_platform_driver mpc52xx_gpt_driver = {
+	.name = "mpc52xx-gpt",
+	.match_table = mpc52xx_gpt_match,
+	.probe = mpc52xx_gpt_probe,
+	.remove = mpc52xx_gpt_remove,
+};
+
+static int __init mpc52xx_gpt_init(void)
+{
+	if (of_register_platform_driver(&mpc52xx_gpt_driver))
+		pr_err("error registering MPC52xx GPT driver\n");
+
+	return 0;
+}
+
+/* Make sure GPIOs and IRQs get set up before anyone tries to use them */
+subsys_initcall(mpc52xx_gpt_init);
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pic.c b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
index 0a093f03c758..480f806fd0a9 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pic.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
@@ -163,8 +163,6 @@ static void mpc52xx_extirq_mask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_clrbit(&intr->ctrl, 11 - l2irq);
 }
 
@@ -176,8 +174,6 @@ static void mpc52xx_extirq_unmask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_setbit(&intr->ctrl, 11 - l2irq);
 }
 
@@ -189,17 +185,15 @@ static void mpc52xx_extirq_ack(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_setbit(&intr->ctrl, 27-l2irq);
 }
 
 static int mpc52xx_extirq_set_type(unsigned int virq, unsigned int flow_type)
 {
-	struct irq_desc *desc = get_irq_desc(virq);
 	u32 ctrl_reg, type;
 	int irq;
 	int l2irq;
+	void *handler = handle_level_irq;
 
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
@@ -207,32 +201,21 @@ static int mpc52xx_extirq_set_type(unsigned int virq, unsigned int flow_type)
 	pr_debug("%s: irq=%x. l2=%d flow_type=%d\n", __func__, irq, l2irq, flow_type);
 
 	switch (flow_type) {
-	case IRQF_TRIGGER_HIGH:
-		type = 0;
-		break;
-	case IRQF_TRIGGER_RISING:
-		type = 1;
-		break;
-	case IRQF_TRIGGER_FALLING:
-		type = 2;
-		break;
-	case IRQF_TRIGGER_LOW:
-		type = 3;
-		break;
+	case IRQF_TRIGGER_HIGH: type = 0; break;
+	case IRQF_TRIGGER_RISING: type = 1; handler = handle_edge_irq; break;
+	case IRQF_TRIGGER_FALLING: type = 2; handler = handle_edge_irq; break;
+	case IRQF_TRIGGER_LOW: type = 3; break;
 	default:
 		type = 0;
 	}
 
-	desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
-	desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
-	if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
-		desc->status |= IRQ_LEVEL;
-
 	ctrl_reg = in_be32(&intr->ctrl);
 	ctrl_reg &= ~(0x3 << (22 - (l2irq * 2)));
 	ctrl_reg |= (type << (22 - (l2irq * 2)));
 	out_be32(&intr->ctrl, ctrl_reg);
 
+	__set_irq_handler_unlocked(virq, handler);
+
 	return 0;
 }
 
@@ -247,6 +230,11 @@ static struct irq_chip mpc52xx_extirq_irqchip = {
 /*
  * Main interrupt irq_chip
  */
+static int mpc52xx_null_set_type(unsigned int virq, unsigned int flow_type)
+{
+	return 0; /* Do nothing so that the sense mask will get updated */
+}
+
 static void mpc52xx_main_mask(unsigned int virq)
 {
 	int irq;
@@ -255,8 +243,6 @@ static void mpc52xx_main_mask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_setbit(&intr->main_mask, 16 - l2irq);
 }
 
@@ -268,8 +254,6 @@ static void mpc52xx_main_unmask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_clrbit(&intr->main_mask, 16 - l2irq);
 }
 
@@ -278,6 +262,7 @@ static struct irq_chip mpc52xx_main_irqchip = {
 	.mask = mpc52xx_main_mask,
 	.mask_ack = mpc52xx_main_mask,
 	.unmask = mpc52xx_main_unmask,
+	.set_type = mpc52xx_null_set_type,
 };
 
 /*
@@ -291,8 +276,6 @@ static void mpc52xx_periph_mask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_setbit(&intr->per_mask, 31 - l2irq);
 }
 
@@ -304,8 +287,6 @@ static void mpc52xx_periph_unmask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_clrbit(&intr->per_mask, 31 - l2irq);
 }
 
@@ -314,6 +295,7 @@ static struct irq_chip mpc52xx_periph_irqchip = {
 	.mask = mpc52xx_periph_mask,
 	.mask_ack = mpc52xx_periph_mask,
 	.unmask = mpc52xx_periph_unmask,
+	.set_type = mpc52xx_null_set_type,
 };
 
 /*
@@ -327,8 +309,6 @@ static void mpc52xx_sdma_mask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_setbit(&sdma->IntMask, l2irq);
 }
 
@@ -340,8 +320,6 @@ static void mpc52xx_sdma_unmask(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	io_be_clrbit(&sdma->IntMask, l2irq);
 }
 
@@ -353,8 +331,6 @@ static void mpc52xx_sdma_ack(unsigned int virq)
 	irq = irq_map[virq].hwirq;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
-
 	out_be32(&sdma->IntPend, 1 << l2irq);
 }
 
@@ -363,9 +339,19 @@ static struct irq_chip mpc52xx_sdma_irqchip = {
 	.mask = mpc52xx_sdma_mask,
 	.unmask = mpc52xx_sdma_unmask,
 	.ack = mpc52xx_sdma_ack,
+	.set_type = mpc52xx_null_set_type,
 };
 
 /**
+ * mpc52xx_is_extirq - Returns true if hwirq number is for an external IRQ
+ */
+static int mpc52xx_is_extirq(int l1, int l2)
+{
+	return ((l1 == 0) && (l2 == 0)) ||
+	       ((l1 == 1) && (l2 >= 1) && (l2 <= 3));
+}
+
+/**
  * mpc52xx_irqhost_xlate - translate virq# from device tree interrupts property
  */
 static int mpc52xx_irqhost_xlate(struct irq_host *h, struct device_node *ct,
@@ -383,38 +369,23 @@ static int mpc52xx_irqhost_xlate(struct irq_host *h, struct device_node *ct,
 
 	intrvect_l1 = (int)intspec[0];
 	intrvect_l2 = (int)intspec[1];
-	intrvect_type = (int)intspec[2];
+	intrvect_type = (int)intspec[2] & 0x3;
 
 	intrvect_linux = (intrvect_l1 << MPC52xx_IRQ_L1_OFFSET) &
 			 MPC52xx_IRQ_L1_MASK;
 	intrvect_linux |= intrvect_l2 & MPC52xx_IRQ_L2_MASK;
 
-	pr_debug("return %x, l1=%d, l2=%d\n", intrvect_linux, intrvect_l1,
-		 intrvect_l2);
-
 	*out_hwirq = intrvect_linux;
-	*out_flags = mpc52xx_map_senses[intrvect_type];
+	*out_flags = IRQ_TYPE_LEVEL_LOW;
+	if (mpc52xx_is_extirq(intrvect_l1, intrvect_l2))
+		*out_flags = mpc52xx_map_senses[intrvect_type];
 
+	pr_debug("return %x, l1=%d, l2=%d\n", intrvect_linux, intrvect_l1,
+		 intrvect_l2);
 	return 0;
 }
 
 /**
- * mpc52xx_irqx_gettype - determine the IRQ sense type (level/edge)
- *
- * Only external IRQs need this.
- */
-static int mpc52xx_irqx_gettype(int irq)
-{
-	int type;
-	u32 ctrl_reg;
-
-	ctrl_reg = in_be32(&intr->ctrl);
-	type = (ctrl_reg >> (22 - irq * 2)) & 0x3;
-
-	return mpc52xx_map_senses[type];
-}
-
-/**
  * mpc52xx_irqhost_map - Hook to map from virq to an irq_chip structure
  */
 static int mpc52xx_irqhost_map(struct irq_host *h, unsigned int virq,
@@ -422,68 +393,46 @@ static int mpc52xx_irqhost_map(struct irq_host *h, unsigned int virq,
 {
 	int l1irq;
 	int l2irq;
-	struct irq_chip *good_irqchip;
-	void *good_handle;
+	struct irq_chip *irqchip;
+	void *hndlr;
 	int type;
+	u32 reg;
 
 	l1irq = (irq & MPC52xx_IRQ_L1_MASK) >> MPC52xx_IRQ_L1_OFFSET;
 	l2irq = irq & MPC52xx_IRQ_L2_MASK;
 
 	/*
-	 * Most of ours IRQs will be level low
-	 * Only external IRQs on some platform may be others
+	 * External IRQs are handled differently by the hardware so they are
+	 * handled by a dedicated irq_chip structure.
 	 */
-	type = IRQ_TYPE_LEVEL_LOW;
+	if (mpc52xx_is_extirq(l1irq, l2irq)) {
+		reg = in_be32(&intr->ctrl);
+		type = mpc52xx_map_senses[(reg >> (22 - l2irq * 2)) & 0x3];
+		if ((type == IRQ_TYPE_EDGE_FALLING) ||
+		    (type == IRQ_TYPE_EDGE_RISING))
+			hndlr = handle_edge_irq;
+		else
+			hndlr = handle_level_irq;
+
+		set_irq_chip_and_handler(virq, &mpc52xx_extirq_irqchip, hndlr);
+		pr_debug("%s: External IRQ%i virq=%x, hw=%x. type=%x\n",
+			 __func__, l2irq, virq, (int)irq, type);
+		return 0;
+	}
 
+	/* It is an internal SOC irq.  Choose the correct irq_chip */
 	switch (l1irq) {
-	case MPC52xx_IRQ_L1_CRIT:
-		pr_debug("%s: Critical. l2=%x\n", __func__, l2irq);
-
-		BUG_ON(l2irq != 0);
-
-		type = mpc52xx_irqx_gettype(l2irq);
-		good_irqchip = &mpc52xx_extirq_irqchip;
-		break;
-
-	case MPC52xx_IRQ_L1_MAIN:
-		pr_debug("%s: Main IRQ[1-3] l2=%x\n", __func__, l2irq);
-
-		if ((l2irq >= 1) && (l2irq <= 3)) {
-			type = mpc52xx_irqx_gettype(l2irq);
-			good_irqchip = &mpc52xx_extirq_irqchip;
-		} else {
-			good_irqchip = &mpc52xx_main_irqchip;
-		}
-		break;
-
-	case MPC52xx_IRQ_L1_PERP:
-		pr_debug("%s: Peripherals. l2=%x\n", __func__, l2irq);
-		good_irqchip = &mpc52xx_periph_irqchip;
-		break;
-
-	case MPC52xx_IRQ_L1_SDMA:
-		pr_debug("%s: SDMA. l2=%x\n", __func__, l2irq);
-		good_irqchip = &mpc52xx_sdma_irqchip;
-		break;
-
+	case MPC52xx_IRQ_L1_MAIN: irqchip = &mpc52xx_main_irqchip; break;
+	case MPC52xx_IRQ_L1_PERP: irqchip = &mpc52xx_periph_irqchip; break;
+	case MPC52xx_IRQ_L1_SDMA: irqchip = &mpc52xx_sdma_irqchip; break;
 	default:
-		pr_err("%s: invalid virq requested (0x%x)\n", __func__, virq);
+		pr_err("%s: invalid irq: virq=%i, l1=%i, l2=%i\n",
+		       __func__, virq, l1irq, l2irq);
 		return -EINVAL;
 	}
 
-	switch (type) {
-	case IRQ_TYPE_EDGE_FALLING:
-	case IRQ_TYPE_EDGE_RISING:
-		good_handle = handle_edge_irq;
-		break;
-	default:
-		good_handle = handle_level_irq;
-	}
-
-	set_irq_chip_and_handler(virq, good_irqchip, good_handle);
-
-	pr_debug("%s: virq=%x, hw=%x. type=%x\n", __func__, virq,
-		 (int)irq, type);
+	set_irq_chip_and_handler(virq, irqchip, handle_level_irq);
+	pr_debug("%s: virq=%x, l1=%i, l2=%i\n", __func__, virq, l1irq, l2irq);
 
 	return 0;
 }
@@ -522,6 +471,8 @@ void __init mpc52xx_init_irq(void)
 		panic(__FILE__	": find_and_map failed on 'mpc5200-bestcomm'. "
 				"Check node !");
 
+	pr_debug("MPC5200 IRQ controller mapped to 0x%p\n", intr);
+
 	/* Disable all interrupt sources. */
 	out_be32(&sdma->IntPend, 0xffffffff);	/* 1 means clear pending */
 	out_be32(&sdma->IntMask, 0xffffffff);	/* 1 means disabled */
@@ -613,8 +564,5 @@ unsigned int mpc52xx_get_irq(void)
 		}
 	}
 
-	pr_debug("%s: irq=%x. virq=%d\n", __func__, irq,
-		 irq_linear_revmap(mpc52xx_irqhost, irq));
-
 	return irq_linear_revmap(mpc52xx_irqhost, irq);
 }