Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix crashkernel= handling when no crashkernel= specified
  [POWERPC] Make emergency stack safe for current_thread_info() use
  [POWERPC] spufs: add .gitignore for spu_save_dump.h & spu_restore_dump.h
  [POWERPC] spufs: trace spu_acquire_saved events
  [POWERPC] spufs: fix marker name for find_victim
  [POWERPC] spufs: add marker for destroy_spu_context
  [POWERPC] spufs: add sputrace marker parameter names
  [POWERPC] spufs: add context switch notification log
  [POWERPC] mpc5200: defconfigs for CM5200, Lite5200B, Motion-PRO and TQM5200
  [POWERPC] mpc5200: Switch mpc5200 dts files to dts-v1 format
  [POWERPC] mpc5200: Fix FEC error handling on FIFO errors
  [POWERPC] mpc5200: add Phytec pcm030 board support
  [POWERPC] mpc5200: add gpiolib support for mpc5200
  [POWERPC] mpc5200: add interrupt type function
  [POWERPC] mpc5200: Fix unterminated of_device_id table

12 files changed, 738 insertions, 21 deletions

diff --git a/arch/powerpc/platforms/52xx/Kconfig b/arch/powerpc/platforms/52xx/Kconfig
index cf945d55c27..acd2fc8cf49 100644
--- a/arch/powerpc/platforms/52xx/Kconfig
+++ b/arch/powerpc/platforms/52xx/Kconfig
@@ -44,3 +44,9 @@ config PPC_MPC5200_BUGFIX
 
 	  It is safe to say 'Y' here
 
+config PPC_MPC5200_GPIO
+	bool "MPC5200 GPIO support"
+	depends on PPC_MPC52xx
+	select HAVE_GPIO_LIB
+	help
+	  Enable gpiolib support for mpc5200 based boards
diff --git a/arch/powerpc/platforms/52xx/Makefile b/arch/powerpc/platforms/52xx/Makefile
index fe1b81bb522..daf0e1568d6 100644
--- a/arch/powerpc/platforms/52xx/Makefile
+++ b/arch/powerpc/platforms/52xx/Makefile
@@ -14,3 +14,5 @@ obj-$(CONFIG_PM)		+= mpc52xx_sleep.o mpc52xx_pm.o
 ifeq ($(CONFIG_PPC_LITE5200),y)
 	obj-$(CONFIG_PM)	+= lite5200_sleep.o lite5200_pm.o
 endif
+
+obj-$(CONFIG_PPC_MPC5200_GPIO)	+= mpc52xx_gpio.o
\ No newline at end of file
diff --git a/arch/powerpc/platforms/52xx/mpc5200_simple.c b/arch/powerpc/platforms/52xx/mpc5200_simple.c
index c48b82bc2aa..a3bda0b9f1f 100644
--- a/arch/powerpc/platforms/52xx/mpc5200_simple.c
+++ b/arch/powerpc/platforms/52xx/mpc5200_simple.c
@@ -51,6 +51,7 @@ static void __init mpc5200_simple_setup_arch(void)
 /* list of the supported boards */
 static char *board[] __initdata = {
 	"promess,motionpro",
+	"phytec,pcm030",
 	"schindler,cm5200",
 	"tqc,tqm5200",
 	NULL
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpio.c b/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
new file mode 100644
index 00000000000..48da5dfe485
--- /dev/null
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
@@ -0,0 +1,465 @@
+/*
+ * MPC52xx gpio driver
+ *
+ * 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 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
+ */
+
+#include <linux/of.h>
+#include <linux/kernel.h>
+#include <linux/of_gpio.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+
+#include <asm/gpio.h>
+#include <asm/mpc52xx.h>
+#include <sysdev/fsl_soc.h>
+
+static DEFINE_SPINLOCK(gpio_lock);
+
+struct mpc52xx_gpiochip {
+	struct of_mm_gpio_chip mmchip;
+	unsigned int shadow_dvo;
+	unsigned int shadow_gpioe;
+	unsigned int shadow_ddr;
+};
+
+/*
+ * GPIO LIB API implementation for wakeup GPIOs.
+ *
+ * There's a maximum of 8 wakeup GPIOs. Which of these are available
+ * for use depends on your board setup.
+ *
+ * 0 -> GPIO_WKUP_7
+ * 1 -> GPIO_WKUP_6
+ * 2 -> PSC6_1
+ * 3 -> PSC6_0
+ * 4 -> ETH_17
+ * 5 -> PSC3_9
+ * 6 -> PSC2_4
+ * 7 -> PSC1_4
+ *
+ */
+static int mpc52xx_wkup_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
+	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
+	unsigned int ret;
+
+	ret = (in_8(&regs->wkup_ival) >> (7 - gpio)) & 1;
+
+	pr_debug("%s: gpio: %d ret: %d\n", __func__, gpio, ret);
+
+	return ret;
+}
+
+static inline void
+__mpc52xx_wkup_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_gpiochip *chip = container_of(mm_gc,
+			struct mpc52xx_gpiochip, mmchip);
+	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
+
+	if (val)
+		chip->shadow_dvo |= 1 << (7 - gpio);
+	else
+		chip->shadow_dvo &= ~(1 << (7 - gpio));
+
+	out_8(&regs->wkup_dvo, chip->shadow_dvo);
+}
+
+static void
+mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	__mpc52xx_wkup_gpio_set(gc, gpio, val);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
+}
+
+static int mpc52xx_wkup_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_gpiochip *chip = container_of(mm_gc,
+			struct mpc52xx_gpiochip, mmchip);
+	struct mpc52xx_gpio_wkup *regs = mm_gc->regs;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/* set the direction */
+	chip->shadow_ddr &= ~(1 << (7 - gpio));
+	out_8(&regs->wkup_ddr, chip->shadow_ddr);
+
+	/* and enable the pin */
+	chip->shadow_gpioe |= 1 << (7 - gpio);
+	out_8(&regs->wkup_gpioe, chip->shadow_gpioe);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	return 0;
+}
+
+static int
+mpc52xx_wkup_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
+	struct mpc52xx_gpio_wkup *regs = mm_gc->regs;
+	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
+			struct mpc52xx_gpiochip, mmchip);
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	__mpc52xx_wkup_gpio_set(gc, gpio, val);
+
+	/* Then set direction */
+	chip->shadow_ddr |= 1 << (7 - gpio);
+	out_8(&regs->wkup_ddr, chip->shadow_ddr);
+
+	/* Finally enable the pin */
+	chip->shadow_gpioe |= 1 << (7 - gpio);
+	out_8(&regs->wkup_gpioe, chip->shadow_gpioe);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
+
+	return 0;
+}
+
+static int __devinit mpc52xx_wkup_gpiochip_probe(struct of_device *ofdev,
+					const struct of_device_id *match)
+{
+	struct mpc52xx_gpiochip *chip;
+	struct mpc52xx_gpio_wkup *regs;
+	struct of_gpio_chip *ofchip;
+	int ret;
+
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	ofchip = &chip->mmchip.of_gc;
+
+	ofchip->gpio_cells          = 2;
+	ofchip->gc.ngpio            = 8;
+	ofchip->gc.direction_input  = mpc52xx_wkup_gpio_dir_in;
+	ofchip->gc.direction_output = mpc52xx_wkup_gpio_dir_out;
+	ofchip->gc.get              = mpc52xx_wkup_gpio_get;
+	ofchip->gc.set              = mpc52xx_wkup_gpio_set;
+
+	ret = of_mm_gpiochip_add(ofdev->node, &chip->mmchip);
+	if (ret)
+		return ret;
+
+	regs = chip->mmchip.regs;
+	chip->shadow_gpioe = in_8(&regs->wkup_gpioe);
+	chip->shadow_ddr = in_8(&regs->wkup_ddr);
+	chip->shadow_dvo = in_8(&regs->wkup_dvo);
+
+	return 0;
+}
+
+static int mpc52xx_gpiochip_remove(struct of_device *ofdev)
+{
+	return -EBUSY;
+}
+
+static const struct of_device_id mpc52xx_wkup_gpiochip_match[] = {
+	{
+		.compatible = "fsl,mpc5200-gpio-wkup",
+	},
+	{}
+};
+
+static struct of_platform_driver mpc52xx_wkup_gpiochip_driver = {
+	.name = "gpio_wkup",
+	.match_table = mpc52xx_wkup_gpiochip_match,
+	.probe = mpc52xx_wkup_gpiochip_probe,
+	.remove = mpc52xx_gpiochip_remove,
+};
+
+/*
+ * GPIO LIB API implementation for simple GPIOs
+ *
+ * There's a maximum of 32 simple GPIOs. Which of these are available
+ * for use depends on your board setup.
+ * The numbering reflects the bit numbering in the port registers:
+ *
+ *  0..1  > reserved
+ *  2..3  > IRDA
+ *  4..7  > ETHR
+ *  8..11 > reserved
+ * 12..15 > USB
+ * 16..17 > reserved
+ * 18..23 > PSC3
+ * 24..27 > PSC2
+ * 28..31 > PSC1
+ */
+static int mpc52xx_simple_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
+	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
+	unsigned int ret;
+
+	ret = (in_be32(&regs->simple_ival) >> (31 - gpio)) & 1;
+
+	return ret;
+}
+
+static inline void
+__mpc52xx_simple_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_gpiochip *chip = container_of(mm_gc,
+			struct mpc52xx_gpiochip, mmchip);
+	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
+
+	if (val)
+		chip->shadow_dvo |= 1 << (31 - gpio);
+	else
+		chip->shadow_dvo &= ~(1 << (31 - gpio));
+	out_be32(&regs->simple_dvo, chip->shadow_dvo);
+}
+
+static void
+mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	__mpc52xx_simple_gpio_set(gc, gpio, val);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
+}
+
+static int mpc52xx_simple_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_gpiochip *chip = container_of(mm_gc,
+			struct mpc52xx_gpiochip, mmchip);
+	struct mpc52xx_gpio *regs = mm_gc->regs;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/* set the direction */
+	chip->shadow_ddr &= ~(1 << (31 - gpio));
+	out_be32(&regs->simple_ddr, chip->shadow_ddr);
+
+	/* and enable the pin */
+	chip->shadow_gpioe |= 1 << (31 - gpio);
+	out_be32(&regs->simple_gpioe, chip->shadow_gpioe);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	return 0;
+}
+
+static int
+mpc52xx_simple_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
+	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
+			struct mpc52xx_gpiochip, mmchip);
+	struct mpc52xx_gpio *regs = mm_gc->regs;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/* First set initial value */
+	__mpc52xx_simple_gpio_set(gc, gpio, val);
+
+	/* Then set direction */
+	chip->shadow_ddr |= 1 << (31 - gpio);
+	out_be32(&regs->simple_ddr, chip->shadow_ddr);
+
+	/* Finally enable the pin */
+	chip->shadow_gpioe |= 1 << (31 - gpio);
+	out_be32(&regs->simple_gpioe, chip->shadow_gpioe);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
+
+	return 0;
+}
+
+static int __devinit mpc52xx_simple_gpiochip_probe(struct of_device *ofdev,
+					const struct of_device_id *match)
+{
+	struct mpc52xx_gpiochip *chip;
+	struct of_gpio_chip *ofchip;
+	struct mpc52xx_gpio *regs;
+	int ret;
+
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	ofchip = &chip->mmchip.of_gc;
+
+	ofchip->gpio_cells          = 2;
+	ofchip->gc.ngpio            = 32;
+	ofchip->gc.direction_input  = mpc52xx_simple_gpio_dir_in;
+	ofchip->gc.direction_output = mpc52xx_simple_gpio_dir_out;
+	ofchip->gc.get              = mpc52xx_simple_gpio_get;
+	ofchip->gc.set              = mpc52xx_simple_gpio_set;
+
+	ret = of_mm_gpiochip_add(ofdev->node, &chip->mmchip);
+	if (ret)
+		return ret;
+
+	regs = chip->mmchip.regs;
+	chip->shadow_gpioe = in_be32(&regs->simple_gpioe);
+	chip->shadow_ddr = in_be32(&regs->simple_ddr);
+	chip->shadow_dvo = in_be32(&regs->simple_dvo);
+
+	return 0;
+}
+
+static const struct of_device_id mpc52xx_simple_gpiochip_match[] = {
+	{
+		.compatible = "fsl,mpc5200-gpio",
+	},
+	{}
+};
+
+static struct of_platform_driver mpc52xx_simple_gpiochip_driver = {
+	.name = "gpio",
+	.match_table = mpc52xx_simple_gpiochip_match,
+	.probe = mpc52xx_simple_gpiochip_probe,
+	.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;
+	unsigned int ret;
+
+	return (in_be32(&regs->status) & (1 << (31 - 23))) ? 1 : 0;
+
+	return ret;
+}
+
+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 *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))
+		printk(KERN_ERR "Unable to register wakeup GPIO driver\n");
+
+	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;
+}
+
+
+/* Make sure we get initialised before anyone else tries to use us */
+subsys_initcall(mpc52xx_gpio_init);
+
+/* No exit call at the moment as we cannot unregister of gpio chips */
+
+MODULE_DESCRIPTION("Freescale MPC52xx gpio driver");
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
+MODULE_LICENSE("GPL v2");
+
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pic.c b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
index d0dead8b9a9..8479394e9ab 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pic.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
@@ -18,6 +18,7 @@
 
 #undef DEBUG
 
+#include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/of.h>
 #include <asm/io.h>
@@ -109,11 +110,48 @@ static void mpc52xx_extirq_ack(unsigned int virq)
 	io_be_setbit(&intr->ctrl, 27-l2irq);
 }
 
+static int mpc52xx_extirq_set_type(unsigned int virq, unsigned int flow_type)
+{
+	u32 ctrl_reg, type;
+	int irq;
+	int l2irq;
+
+	irq = irq_map[virq].hwirq;
+	l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET;
+
+	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;
+	default:
+		type = 0;
+	}
+
+	ctrl_reg = in_be32(&intr->ctrl);
+	ctrl_reg &= ~(0x3 << (22 - (l2irq * 2)));
+	ctrl_reg |= (type << (22 - (l2irq * 2)));
+	out_be32(&intr->ctrl, ctrl_reg);
+
+	return 0;
+}
+
 static struct irq_chip mpc52xx_extirq_irqchip = {
 	.typename = " MPC52xx IRQ[0-3] ",
 	.mask = mpc52xx_extirq_mask,
 	.unmask = mpc52xx_extirq_unmask,
 	.ack = mpc52xx_extirq_ack,
+	.set_type = mpc52xx_extirq_set_type,
 };
 
 /*
diff --git a/arch/powerpc/platforms/cell/spufs/.gitignore b/arch/powerpc/platforms/cell/spufs/.gitignore
new file mode 100644
index 00000000000..a09ee8d84d6
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/.gitignore
@@ -0,0 +1,2 @@
+spu_save_dump.h
+spu_restore_dump.h
diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c
index 0ad83aeb70b..177735f7931 100644
--- a/arch/powerpc/platforms/cell/spufs/context.c
+++ b/arch/powerpc/platforms/cell/spufs/context.c
@@ -78,6 +78,7 @@ void destroy_spu_context(struct kref *kref)
 {
 	struct spu_context *ctx;
 	ctx = container_of(kref, struct spu_context, kref);
+	spu_context_nospu_trace(destroy_spu_context__enter, ctx);
 	mutex_lock(&ctx->state_mutex);
 	spu_deactivate(ctx);
 	mutex_unlock(&ctx->state_mutex);
@@ -88,6 +89,7 @@ void destroy_spu_context(struct kref *kref)
 		kref_put(ctx->prof_priv_kref, ctx->prof_priv_release);
 	BUG_ON(!list_empty(&ctx->rq));
 	atomic_dec(&nr_spu_contexts);
+	kfree(ctx->switch_log);
 	kfree(ctx);
 }
 
@@ -150,6 +152,8 @@ int spu_acquire_saved(struct spu_context *ctx)
 {
 	int ret;
 
+	spu_context_nospu_trace(spu_acquire_saved__enter, ctx);
+
 	ret = spu_acquire(ctx);
 	if (ret)
 		return ret;
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 08f44d1971a..80911a37340 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -2386,6 +2386,171 @@ static const struct file_operations spufs_stat_fops = {
 	.release	= single_release,
 };
 
+static inline int spufs_switch_log_used(struct spu_context *ctx)
+{
+	return (ctx->switch_log->head - ctx->switch_log->tail) %
+		SWITCH_LOG_BUFSIZE;
+}
+
+static inline int spufs_switch_log_avail(struct spu_context *ctx)
+{
+	return SWITCH_LOG_BUFSIZE - spufs_switch_log_used(ctx);
+}
+
+static int spufs_switch_log_open(struct inode *inode, struct file *file)
+{
+	struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
+
+	/*
+	 * We (ab-)use the mapping_lock here because it serves the similar
+	 * purpose for synchronizing open/close elsewhere.  Maybe it should
+	 * be renamed eventually.
+	 */
+	mutex_lock(&ctx->mapping_lock);
+	if (ctx->switch_log) {
+		spin_lock(&ctx->switch_log->lock);
+		ctx->switch_log->head = 0;
+		ctx->switch_log->tail = 0;
+		spin_unlock(&ctx->switch_log->lock);
+	} else {
+		/*
+		 * We allocate the switch log data structures on first open.
+		 * They will never be free because we assume a context will
+		 * be traced until it goes away.
+		 */
+		ctx->switch_log = kzalloc(sizeof(struct switch_log) +
+			SWITCH_LOG_BUFSIZE * sizeof(struct switch_log_entry),
+			GFP_KERNEL);
+		if (!ctx->switch_log)
+			goto out;
+		spin_lock_init(&ctx->switch_log->lock);
+		init_waitqueue_head(&ctx->switch_log->wait);
+	}
+	mutex_unlock(&ctx->mapping_lock);
+
+	return 0;
+ out:
+	mutex_unlock(&ctx->mapping_lock);
+	return -ENOMEM;
+}
+
+static int switch_log_sprint(struct spu_context *ctx, char *tbuf, int n)
+{
+	struct switch_log_entry *p;
+
+	p = ctx->switch_log->log + ctx->switch_log->tail % SWITCH_LOG_BUFSIZE;
+
+	return snprintf(tbuf, n, "%u.%09u %d %u %u %llu\n",
+			(unsigned int) p->tstamp.tv_sec,
+			(unsigned int) p->tstamp.tv_nsec,
+			p->spu_id,
+			(unsigned int) p->type,
+			(unsigned int) p->val,
+			(unsigned long long) p->timebase);
+}
+
+static ssize_t spufs_switch_log_read(struct file *file, char __user *buf,
+			     size_t len, loff_t *ppos)
+{
+	struct inode *inode = file->f_path.dentry->d_inode;
+	struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
+	int error = 0, cnt = 0;
+
+	if (!buf || len < 0)
+		return -EINVAL;
+
+	while (cnt < len) {
+		char tbuf[128];
+		int width;
+
+		if (file->f_flags & O_NONBLOCK) {
+			if (spufs_switch_log_used(ctx) <= 0)
+				return cnt ? cnt : -EAGAIN;
+		} else {
+			/* Wait for data in buffer */
+			error = wait_event_interruptible(ctx->switch_log->wait,
+					spufs_switch_log_used(ctx) > 0);
+			if (error)
+				break;
+		}
+
+		spin_lock(&ctx->switch_log->lock);
+		if (ctx->switch_log->head == ctx->switch_log->tail) {
+			/* multiple readers race? */
+			spin_unlock(&ctx->switch_log->lock);
+			continue;
+		}
+
+		width = switch_log_sprint(ctx, tbuf, sizeof(tbuf));
+		if (width < len) {
+			ctx->switch_log->tail =
+				(ctx->switch_log->tail + 1) %
+				 SWITCH_LOG_BUFSIZE;
+		}
+
+		spin_unlock(&ctx->switch_log->lock);
+
+		/*
+		 * If the record is greater than space available return
+		 * partial buffer (so far)
+		 */
+		if (width >= len)
+			break;
+
+		error = copy_to_user(buf + cnt, tbuf, width);
+		if (error)
+			break;
+		cnt += width;
+	}
+
+	return cnt == 0 ? error : cnt;
+}
+
+static unsigned int spufs_switch_log_poll(struct file *file, poll_table *wait)
+{
+	struct inode *inode = file->f_path.dentry->d_inode;
+	struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
+	unsigned int mask = 0;
+
+	poll_wait(file, &ctx->switch_log->wait, wait);
+
+	if (spufs_switch_log_used(ctx) > 0)
+		mask |= POLLIN;
+
+	return mask;
+}
+
+static const struct file_operations spufs_switch_log_fops = {
+	.owner	= THIS_MODULE,
+	.open	= spufs_switch_log_open,
+	.read	= spufs_switch_log_read,
+	.poll	= spufs_switch_log_poll,
+};
+
+void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
+		u32 type, u32 val)
+{
+	if (!ctx->switch_log)
+		return;
+
+	spin_lock(&ctx->switch_log->lock);
+	if (spufs_switch_log_avail(ctx) > 1) {
+		struct switch_log_entry *p;
+
+		p = ctx->switch_log->log + ctx->switch_log->head;
+		ktime_get_ts(&p->tstamp);
+		p->timebase = get_tb();
+		p->spu_id = spu ? spu->number : -1;
+		p->type = type;
+		p->val = val;
+
+		ctx->switch_log->head =
+			(ctx->switch_log->head + 1) % SWITCH_LOG_BUFSIZE;
+	}
+	spin_unlock(&ctx->switch_log->lock);
+
+	wake_up(&ctx->switch_log->wait);
+}
 
 struct tree_descr spufs_dir_contents[] = {
 	{ "capabilities", &spufs_caps_fops, 0444, },
@@ -2422,6 +2587,7 @@ struct tree_descr spufs_dir_contents[] = {
 	{ "proxydma_info", &spufs_proxydma_info_fops, 0444, },
 	{ "tid", &spufs_tid_fops, 0444, },
 	{ "stat", &spufs_stat_fops, 0444, },
+	{ "switch_log", &spufs_switch_log_fops, 0444 },
 	{},
 };
 
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index 96bf7c2b86f..a9c35b7b719 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -405,6 +405,8 @@ long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *event)
 	ret = spu_run_fini(ctx, npc, &status);
 	spu_yield(ctx);
 
+	spu_switch_log_notify(NULL, ctx, SWITCH_LOG_EXIT, status);
+
 	if ((status & SPU_STATUS_STOPPED_BY_STOP) &&
 	    (((status >> SPU_STOP_STATUS_SHIFT) & 0x3f00) == 0x2100))
 		ctx->stats.libassist++;
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 45dcd269350..7298e7db2c8 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -240,6 +240,7 @@ static void spu_bind_context(struct spu *spu, struct spu_context *ctx)
 	spu->mfc_callback = spufs_mfc_callback;
 	mb();
 	spu_unmap_mappings(ctx);
+	spu_switch_log_notify(spu, ctx, SWITCH_LOG_START, 0);
 	spu_restore(&ctx->csa, spu);
 	spu->timestamp = jiffies;
 	spu_cpu_affinity_set(spu, raw_smp_processor_id());
@@ -419,6 +420,7 @@ static void spu_unbind_context(struct spu *spu, struct spu_context *ctx)
 	spu_switch_notify(spu, NULL);
 	spu_unmap_mappings(ctx);
 	spu_save(&ctx->csa, spu);
+	spu_switch_log_notify(spu, ctx, SWITCH_LOG_STOP, 0);
 	spu->timestamp = jiffies;
 	ctx->state = SPU_STATE_SAVED;
 	spu->ibox_callback = NULL;
@@ -591,7 +593,7 @@ static struct spu *find_victim(struct spu_context *ctx)
 	struct spu *spu;
 	int node, n;
 
-	spu_context_nospu_trace(spu_find_vitim__enter, ctx);
+	spu_context_nospu_trace(spu_find_victim__enter, ctx);
 
 	/*
 	 * Look for a possible preemption candidate on the local node first.
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index cdc515182f8..7312745b754 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -47,6 +47,30 @@ enum {
 	SPU_SCHED_SPU_RUN,	/* context is within spu_run */
 };
 
+enum {
+	SWITCH_LOG_BUFSIZE = 4096,
+};
+
+enum {
+	SWITCH_LOG_START,
+	SWITCH_LOG_STOP,
+	SWITCH_LOG_EXIT,
+};
+
+struct switch_log {
+	spinlock_t		lock;
+	wait_queue_head_t	wait;
+	unsigned long		head;
+	unsigned long		tail;
+	struct switch_log_entry {
+		struct timespec	tstamp;
+		s32		spu_id;
+		u32		type;
+		u32		val;
+		u64		timebase;
+	} log[];
+};
+
 struct spu_context {
 	struct spu *spu;		  /* pointer to a physical SPU */
 	struct spu_state csa;		  /* SPU context save area. */
@@ -116,6 +140,9 @@ struct spu_context {
 		unsigned long long libassist;
 	} stats;
 
+	/* context switch log */
+	struct switch_log *switch_log;
+
 	struct list_head aff_list;
 	int aff_head;
 	int aff_offset;
@@ -256,6 +283,8 @@ int spu_activate(struct spu_context *ctx, unsigned long flags);
 void spu_deactivate(struct spu_context *ctx);
 void spu_yield(struct spu_context *ctx);
 void spu_switch_notify(struct spu *spu, struct spu_context *ctx);
+void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
+		u32 type, u32 val);
 void spu_set_timeslice(struct spu_context *ctx);
 void spu_update_sched_info(struct spu_context *ctx);
 void __spu_update_sched_info(struct spu_context *ctx);
@@ -330,8 +359,8 @@ extern void spuctx_switch_state(struct spu_context *ctx,
 		enum spu_utilization_state new_state);
 
 #define spu_context_trace(name, ctx, spu) \
-	trace_mark(name, "%p %p", ctx, spu);
+	trace_mark(name, "ctx %p spu %p", ctx, spu);
 #define spu_context_nospu_trace(name, ctx) \
-	trace_mark(name, "%p", ctx);
+	trace_mark(name, "ctx %p", ctx);
 
 #endif
diff --git a/arch/powerpc/platforms/cell/spufs/sputrace.c b/arch/powerpc/platforms/cell/spufs/sputrace.c
index aea5286f124..53202422ba7 100644
--- a/arch/powerpc/platforms/cell/spufs/sputrace.c
+++ b/arch/powerpc/platforms/cell/spufs/sputrace.c
@@ -171,24 +171,24 @@ static void spu_context_nospu_event(void *probe_private, void *call_data,
 }
 
 struct spu_probe spu_probes[] = {
-	{ "spu_bind_context__enter", "%p %p", spu_context_event },
-	{ "spu_unbind_context__enter", "%p %p", spu_context_event },
-	{ "spu_get_idle__enter", "%p", spu_context_nospu_event },
-	{ "spu_get_idle__found", "%p %p", spu_context_event },
-	{ "spu_get_idle__not_found", "%p", spu_context_nospu_event },
-	{ "spu_find_victim__enter", "%p", spu_context_nospu_event },
-	{ "spusched_tick__preempt", "%p %p", spu_context_event },
-	{ "spusched_tick__newslice", "%p", spu_context_nospu_event },
-	{ "spu_yield__enter", "%p", spu_context_nospu_event },
-	{ "spu_deactivate__enter", "%p", spu_context_nospu_event },
-	{ "__spu_deactivate__unload", "%p %p", spu_context_event },
-	{ "spufs_ps_nopfn__enter", "%p", spu_context_nospu_event },
-	{ "spufs_ps_nopfn__sleep", "%p", spu_context_nospu_event },
-	{ "spufs_ps_nopfn__wake", "%p %p", spu_context_event },
-	{ "spufs_ps_nopfn__insert", "%p %p", spu_context_event },
-	{ "spu_acquire_saved__enter", "%p", spu_context_nospu_event },
-	{ "destroy_spu_context__enter", "%p", spu_context_nospu_event },
-	{ "spufs_stop_callback__enter", "%p %p", spu_context_event },
+	{ "spu_bind_context__enter", "ctx %p spu %p", spu_context_event },
+	{ "spu_unbind_context__enter", "ctx %p spu %p", spu_context_event },
+	{ "spu_get_idle__enter", "ctx %p", spu_context_nospu_event },
+	{ "spu_get_idle__found", "ctx %p spu %p", spu_context_event },
+	{ "spu_get_idle__not_found", "ctx %p", spu_context_nospu_event },
+	{ "spu_find_victim__enter", "ctx %p", spu_context_nospu_event },
+	{ "spusched_tick__preempt", "ctx %p spu %p", spu_context_event },
+	{ "spusched_tick__newslice", "ctx %p", spu_context_nospu_event },
+	{ "spu_yield__enter", "ctx %p", spu_context_nospu_event },
+	{ "spu_deactivate__enter", "ctx %p", spu_context_nospu_event },
+	{ "__spu_deactivate__unload", "ctx %p spu %p", spu_context_event },
+	{ "spufs_ps_nopfn__enter", "ctx %p", spu_context_nospu_event },
+	{ "spufs_ps_nopfn__sleep", "ctx %p", spu_context_nospu_event },
+	{ "spufs_ps_nopfn__wake", "ctx %p spu %p", spu_context_event },
+	{ "spufs_ps_nopfn__insert", "ctx %p spu %p", spu_context_event },
+	{ "spu_acquire_saved__enter", "ctx %p", spu_context_nospu_event },
+	{ "destroy_spu_context__enter", "ctx %p", spu_context_nospu_event },
+	{ "spufs_stop_callback__enter", "ctx %p spu %p", spu_context_event },
 };
 
 static int __init sputrace_init(void)