Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	Documentation/powerpc/booting-without-of.txt
	drivers/atm/Makefile
	drivers/net/fs_enet/fs_enet-main.c
	drivers/pci/pci-acpi.c
	net/8021q/vlan.c
	net/iucv/iucv.c

6 files changed, 1109 insertions, 100 deletions

diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig
index b66fb3c4e228..5e28c217b8c2 100644
--- a/arch/arm/plat-s3c24xx/Kconfig
+++ b/arch/arm/plat-s3c24xx/Kconfig
@@ -9,6 +9,7 @@ config PLAT_S3C24XX
 	depends on ARCH_S3C2410
 	default y if ARCH_S3C2410
 	select NO_IOPORT
+	select HAVE_GPIO_LIB
 	help
 	  Base platform code for any Samsung S3C24XX device
 
@@ -20,6 +21,13 @@ config CPU_S3C244X
 	help
 	  Support for S3C2440 and S3C2442 Samsung Mobile CPU based systems.
 
+config S3C24XX_PWM
+	bool "PWM device support"
+	select HAVE_PWM
+	help
+	  Support for exporting the PWM timer blocks via the pwm device
+	  system.
+
 config PM_SIMTEC
 	bool
 	help
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index 131d20237dd7..d82767b2b833 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -16,8 +16,10 @@ obj-y				+= cpu.o
 obj-y				+= irq.o
 obj-y				+= devs.o
 obj-y				+= gpio.o
+obj-y				+= gpiolib.o
 obj-y				+= time.o
 obj-y				+= clock.o
+obj-y				+= pwm-clock.o
 
 # Architecture dependant builds
 
@@ -27,5 +29,6 @@ obj-$(CONFIG_CPU_S3C244X)	+= s3c244x-clock.o
 obj-$(CONFIG_PM_SIMTEC)		+= pm-simtec.o
 obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_PM)		+= sleep.o
+obj-$(CONFIG_HAVE_PWM)		+= pwm.o
 obj-$(CONFIG_S3C2410_DMA)	+= dma.o
 obj-$(CONFIG_MACH_SMDK)		+= common-smdk.o
diff --git a/arch/arm/plat-s3c24xx/devs.c b/arch/arm/plat-s3c24xx/devs.c
index e546e933b3f7..eea3b32ff798 100644
--- a/arch/arm/plat-s3c24xx/devs.c
+++ b/arch/arm/plat-s3c24xx/devs.c
@@ -495,106 +495,6 @@ struct platform_device s3c_device_spi1 = {
 
 EXPORT_SYMBOL(s3c_device_spi1);
 
-/* pwm timer blocks */
-
-static struct resource s3c_timer0_resource[] = {
-	[0] = {
-		.start = S3C24XX_PA_TIMER + 0x0C,
-		.end   = S3C24XX_PA_TIMER + 0x0C + 0xB,
-		.flags = IORESOURCE_MEM,
-	},
-	[1] = {
-		.start = IRQ_TIMER0,
-		.end   = IRQ_TIMER0,
-		.flags = IORESOURCE_IRQ,
-	}
-
-};
-
-struct platform_device s3c_device_timer0 = {
-	.name		  = "s3c2410-timer",
-	.id		  = 0,
-	.num_resources	  = ARRAY_SIZE(s3c_timer0_resource),
-	.resource	  = s3c_timer0_resource,
-};
-
-EXPORT_SYMBOL(s3c_device_timer0);
-
-/* timer 1 */
-
-static struct resource s3c_timer1_resource[] = {
-	[0] = {
-		.start = S3C24XX_PA_TIMER + 0x18,
-		.end   = S3C24XX_PA_TIMER + 0x23,
-		.flags = IORESOURCE_MEM,
-	},
-	[1] = {
-		.start = IRQ_TIMER1,
-		.end   = IRQ_TIMER1,
-		.flags = IORESOURCE_IRQ,
-	}
-
-};
-
-struct platform_device s3c_device_timer1 = {
-	.name		  = "s3c2410-timer",
-	.id		  = 1,
-	.num_resources	  = ARRAY_SIZE(s3c_timer1_resource),
-	.resource	  = s3c_timer1_resource,
-};
-
-EXPORT_SYMBOL(s3c_device_timer1);
-
-/* timer 2 */
-
-static struct resource s3c_timer2_resource[] = {
-	[0] = {
-		.start = S3C24XX_PA_TIMER + 0x24,
-		.end   = S3C24XX_PA_TIMER + 0x2F,
-		.flags = IORESOURCE_MEM,
-	},
-	[1] = {
-		.start = IRQ_TIMER2,
-		.end   = IRQ_TIMER2,
-		.flags = IORESOURCE_IRQ,
-	}
-
-};
-
-struct platform_device s3c_device_timer2 = {
-	.name		  = "s3c2410-timer",
-	.id		  = 2,
-	.num_resources	  = ARRAY_SIZE(s3c_timer2_resource),
-	.resource	  = s3c_timer2_resource,
-};
-
-EXPORT_SYMBOL(s3c_device_timer2);
-
-/* timer 3 */
-
-static struct resource s3c_timer3_resource[] = {
-	[0] = {
-		.start = S3C24XX_PA_TIMER + 0x30,
-		.end   = S3C24XX_PA_TIMER + 0x3B,
-		.flags = IORESOURCE_MEM,
-	},
-	[1] = {
-		.start = IRQ_TIMER3,
-		.end   = IRQ_TIMER3,
-		.flags = IORESOURCE_IRQ,
-	}
-
-};
-
-struct platform_device s3c_device_timer3 = {
-	.name		  = "s3c2410-timer",
-	.id		  = 3,
-	.num_resources	  = ARRAY_SIZE(s3c_timer3_resource),
-	.resource	  = s3c_timer3_resource,
-};
-
-EXPORT_SYMBOL(s3c_device_timer3);
-
 #ifdef CONFIG_CPU_S3C2440
 
 /* Camif Controller */
diff --git a/arch/arm/plat-s3c24xx/gpiolib.c b/arch/arm/plat-s3c24xx/gpiolib.c
new file mode 100644
index 000000000000..825d8d0c5ca2
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/gpiolib.c
@@ -0,0 +1,259 @@
+/* linux/arch/arm/plat-s3c24xx/gpiolib.c
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX GPIOlib support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+
+#include <asm/arch/regs-gpio.h>
+
+struct s3c24xx_gpio_chip {
+	struct gpio_chip	chip;
+	void __iomem		*base;
+};
+
+static inline struct s3c24xx_gpio_chip *to_s3c_chip(struct gpio_chip *gpc)
+{
+	return container_of(gpc, struct s3c24xx_gpio_chip, chip);
+}
+
+/* these routines are exported for use by other parts of the platform
+ * and system support, but are not intended to be used directly by the
+ * drivers themsevles.
+ */
+
+int s3c24xx_gpiolib_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
+	void __iomem *base = ourchip->base;
+	unsigned long flags;
+	unsigned long con;
+
+	local_irq_save(flags);
+
+	con = __raw_readl(base + 0x00);
+	con &= ~(3 << (offset * 2));
+	con |= (S3C2410_GPIO_OUTPUT & 0xf) << (offset * 2);
+
+	__raw_writel(con, base + 0x00);
+
+	local_irq_restore(flags);
+	return 0;
+}
+
+int s3c24xx_gpiolib_output(struct gpio_chip *chip,
+				  unsigned offset, int value)
+{
+	struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
+	void __iomem *base = ourchip->base;
+	unsigned long flags;
+	unsigned long dat;
+	unsigned long con;
+
+	local_irq_save(flags);
+
+	dat = __raw_readl(base + 0x04);
+	dat &= ~(1 << offset);
+	if (value)
+		dat |= 1 << offset;
+	__raw_writel(dat, base + 0x04);
+
+	con = __raw_readl(base + 0x00);
+	con &= ~(3 << (offset * 2));
+	con |= (S3C2410_GPIO_OUTPUT & 0xf) << (offset * 2);
+
+	__raw_writel(con, base + 0x00);
+	__raw_writel(dat, base + 0x04);
+
+	local_irq_restore(flags);
+	return 0;
+}
+
+void s3c24xx_gpiolib_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
+	void __iomem *base = ourchip->base;
+	unsigned long flags;
+	unsigned long dat;
+
+	local_irq_save(flags);
+
+	dat = __raw_readl(base + 0x04);
+	dat &= ~(1 << offset);
+	if (value)
+		dat |= 1 << offset;
+	__raw_writel(dat, base + 0x04);
+
+	local_irq_restore(flags);
+}
+
+int s3c24xx_gpiolib_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
+	unsigned long val;
+
+	val = __raw_readl(ourchip->base + 0x04);
+	val >>= offset;
+	val &= 1;
+
+	return val;
+}
+
+static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
+{
+	return -EINVAL;
+}
+
+static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
+					unsigned offset, int value)
+{
+	struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
+	void __iomem *base = ourchip->base;
+	unsigned long flags;
+	unsigned long dat;
+	unsigned long con;
+
+	local_irq_save(flags);
+
+	con = __raw_readl(base + 0x00);
+	dat = __raw_readl(base + 0x04);
+
+	dat &= ~(1 << offset);
+	if (value)
+		dat |= 1 << offset;
+
+	__raw_writel(dat, base + 0x04);
+
+	con &= ~(1 << offset);
+
+	__raw_writel(con, base + 0x00);
+	__raw_writel(dat, base + 0x04);
+
+	local_irq_restore(flags);
+	return 0;
+}
+
+
+struct s3c24xx_gpio_chip gpios[] = {
+	[0] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPA0),
+		.chip	= {
+			.base			= S3C2410_GPA0,
+			.owner			= THIS_MODULE,
+			.label			= "GPIOA",
+			.ngpio			= 24,
+			.direction_input	= s3c24xx_gpiolib_banka_input,
+			.direction_output	= s3c24xx_gpiolib_banka_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+	[1] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPB0),
+		.chip	= {
+			.base			= S3C2410_GPB0,
+			.owner			= THIS_MODULE,
+			.label			= "GPIOB",
+			.ngpio			= 16,
+			.direction_input	= s3c24xx_gpiolib_input,
+			.direction_output	= s3c24xx_gpiolib_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+	[2] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPC0),
+		.chip	= {
+			.base			= S3C2410_GPC0,
+			.owner			= THIS_MODULE,
+			.label			= "GPIOC",
+			.ngpio			= 16,
+			.direction_input	= s3c24xx_gpiolib_input,
+			.direction_output	= s3c24xx_gpiolib_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+	[3] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPD0),
+		.chip	= {
+			.base			= S3C2410_GPD0,
+			.owner			= THIS_MODULE,
+			.label			= "GPIOD",
+			.ngpio			= 16,
+			.direction_input	= s3c24xx_gpiolib_input,
+			.direction_output	= s3c24xx_gpiolib_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+	[4] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPE0),
+		.chip	= {
+			.base			= S3C2410_GPE0,
+			.label			= "GPIOE",
+			.owner			= THIS_MODULE,
+			.ngpio			= 16,
+			.direction_input	= s3c24xx_gpiolib_input,
+			.direction_output	= s3c24xx_gpiolib_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+	[5] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPF0),
+		.chip	= {
+			.base			= S3C2410_GPF0,
+			.owner			= THIS_MODULE,
+			.label			= "GPIOF",
+			.ngpio			= 8,
+			.direction_input	= s3c24xx_gpiolib_input,
+			.direction_output	= s3c24xx_gpiolib_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+	[6] = {
+		.base	= S3C24XX_GPIO_BASE(S3C2410_GPG0),
+		.chip	= {
+			.base			= S3C2410_GPG0,
+			.owner			= THIS_MODULE,
+			.label			= "GPIOG",
+			.ngpio			= 10,
+			.direction_input	= s3c24xx_gpiolib_input,
+			.direction_output	= s3c24xx_gpiolib_output,
+			.set			= s3c24xx_gpiolib_set,
+			.get			= s3c24xx_gpiolib_get,
+		},
+	},
+};
+
+static __init int s3c24xx_gpiolib_init(void)
+{
+	struct s3c24xx_gpio_chip *chip = gpios;
+	int gpn;
+
+	for (gpn = 0; gpn < ARRAY_SIZE(gpios); gpn++, chip++)
+		gpiochip_add(&chip->chip);
+
+	return 0;
+}
+
+arch_initcall(s3c24xx_gpiolib_init);
diff --git a/arch/arm/plat-s3c24xx/pwm-clock.c b/arch/arm/plat-s3c24xx/pwm-clock.c
new file mode 100644
index 000000000000..2cda3e3c6786
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/pwm-clock.c
@@ -0,0 +1,437 @@
+/* linux/arch/arm/plat-s3c24xx/pwm-clock.c
+ *
+ * Copyright (c) 2007 Simtec Electronics
+ * Copyright (c) 2007, 2008 Ben Dooks
+ *	Ben Dooks <ben-linux@fluff.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+*/
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+
+#include <asm/arch/regs-clock.h>
+#include <asm/arch/regs-gpio.h>
+
+#include <asm/plat-s3c24xx/clock.h>
+#include <asm/plat-s3c24xx/cpu.h>
+
+#include <asm/plat-s3c/regs-timer.h>
+
+/* Each of the timers 0 through 5 go through the following
+ * clock tree, with the inputs depending on the timers.
+ *
+ * pclk ---- [ prescaler 0 ] -+---> timer 0
+ *			      +---> timer 1
+ *
+ * pclk ---- [ prescaler 1 ] -+---> timer 2
+ *			      +---> timer 3
+ *			      \---> timer 4
+ *
+ * Which are fed into the timers as so:
+ *
+ * prescaled 0 ---- [ div 2,4,8,16 ] ---\
+ *				       [mux] -> timer 0
+ * tclk 0 ------------------------------/
+ *
+ * prescaled 0 ---- [ div 2,4,8,16 ] ---\
+ *				       [mux] -> timer 1
+ * tclk 0 ------------------------------/
+ *
+ *
+ * prescaled 1 ---- [ div 2,4,8,16 ] ---\
+ *				       [mux] -> timer 2
+ * tclk 1 ------------------------------/
+ *
+ * prescaled 1 ---- [ div 2,4,8,16 ] ---\
+ *				       [mux] -> timer 3
+ * tclk 1 ------------------------------/
+ *
+ * prescaled 1 ---- [ div 2,4,8, 16 ] --\
+ *				       [mux] -> timer 4
+ * tclk 1 ------------------------------/
+ *
+ * Since the mux and the divider are tied together in the
+ * same register space, it is impossible to set the parent
+ * and the rate at the same time. To avoid this, we add an
+ * intermediate 'prescaled-and-divided' clock to select
+ * as the parent for the timer input clock called tdiv.
+ *
+ * prescaled clk --> pwm-tdiv ---\
+ *                             [ mux ] --> timer X
+ * tclk -------------------------/
+*/
+
+static unsigned long clk_pwm_scaler_getrate(struct clk *clk)
+{
+	unsigned long tcfg0 = __raw_readl(S3C2410_TCFG0);
+
+	if (clk->id == 1) {
+		tcfg0 &= S3C2410_TCFG_PRESCALER1_MASK;
+		tcfg0 >>= S3C2410_TCFG_PRESCALER1_SHIFT;
+	} else {
+		tcfg0 &= S3C2410_TCFG_PRESCALER0_MASK;
+	}
+
+	return clk_get_rate(clk->parent) / (tcfg0 + 1);
+}
+
+/* TODO - add set rate calls. */
+
+struct clk clk_timer_scaler[] = {
+	[0]	= {
+		.name		= "pwm-scaler0",
+		.id		= -1,
+		.get_rate	= clk_pwm_scaler_getrate,
+	},
+	[1]	= {
+		.name		= "pwm-scaler1",
+		.id		= -1,
+		.get_rate	= clk_pwm_scaler_getrate,
+	},
+};
+
+struct clk clk_timer_tclk[] = {
+	[0]	= {
+		.name		= "pwm-tclk0",
+		.id		= -1,
+	},
+	[1]	= {
+		.name		= "pwm-tclk1",
+		.id		= -1,
+	},
+};
+
+struct pwm_tdiv_clk {
+	struct clk	clk;
+	unsigned int	divisor;
+};
+
+static inline struct pwm_tdiv_clk *to_tdiv(struct clk *clk)
+{
+	return container_of(clk, struct pwm_tdiv_clk, clk);
+}
+
+static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
+{
+	return 1 << (1 + tcfg1);
+}
+
+static unsigned long clk_pwm_tdiv_get_rate(struct clk *clk)
+{
+	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
+	unsigned int divisor;
+
+	tcfg1 >>= S3C2410_TCFG1_SHIFT(clk->id);
+	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
+
+	if (tcfg1 == S3C2410_TCFG1_MUX_TCLK)
+		divisor = to_tdiv(clk)->divisor;
+	else
+		divisor = tcfg_to_divisor(tcfg1);
+
+	return clk_get_rate(clk->parent) / divisor;
+}
+
+static unsigned long clk_pwm_tdiv_round_rate(struct clk *clk,
+					     unsigned long rate)
+{
+	unsigned long parent_rate;
+	unsigned long divisor;
+
+	parent_rate = clk_get_rate(clk->parent);
+	divisor = parent_rate / rate;
+
+	if (divisor <= 2)
+		divisor = 2;
+	else if (divisor <= 4)
+		divisor = 4;
+	else if (divisor <= 8)
+		divisor = 8;
+	else
+		divisor = 16;
+
+	return parent_rate / divisor;
+}
+
+static unsigned long clk_pwm_tdiv_bits(struct pwm_tdiv_clk *divclk)
+{
+	unsigned long bits;
+
+	switch (divclk->divisor) {
+	case 2:
+		bits = S3C2410_TCFG1_MUX_DIV2;
+		break;
+	case 4:
+		bits = S3C2410_TCFG1_MUX_DIV4;
+		break;
+	case 8:
+		bits = S3C2410_TCFG1_MUX_DIV8;
+		break;
+	case 16:
+	default:
+		bits = S3C2410_TCFG1_MUX_DIV16;
+		break;
+	}
+
+	return bits;
+}
+
+static void clk_pwm_tdiv_update(struct pwm_tdiv_clk *divclk)
+{
+	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
+	unsigned long bits = clk_pwm_tdiv_bits(divclk);
+	unsigned long flags;
+	unsigned long shift =  S3C2410_TCFG1_SHIFT(divclk->clk.id);
+
+	local_irq_save(flags);
+
+	tcfg1 = __raw_readl(S3C2410_TCFG1);
+	tcfg1 &= ~(S3C2410_TCFG1_MUX_MASK << shift);
+	tcfg1 |= bits << shift;
+	__raw_writel(tcfg1, S3C2410_TCFG1);
+
+	local_irq_restore(flags);
+}
+
+static int clk_pwm_tdiv_set_rate(struct clk *clk, unsigned long rate)
+{
+	struct pwm_tdiv_clk *divclk = to_tdiv(clk);
+	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
+	unsigned long parent_rate = clk_get_rate(clk->parent);
+	unsigned long divisor;
+
+	tcfg1 >>= S3C2410_TCFG1_SHIFT(clk->id);
+	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
+
+	rate = clk_round_rate(clk, rate);
+	divisor = parent_rate / rate;
+
+	if (divisor > 16)
+		return -EINVAL;
+
+	divclk->divisor = divisor;
+
+	/* Update the current MUX settings if we are currently
+	 * selected as the clock source for this clock. */
+
+	if (tcfg1 != S3C2410_TCFG1_MUX_TCLK)
+		clk_pwm_tdiv_update(divclk);
+
+	return 0;
+}
+
+struct pwm_tdiv_clk clk_timer_tdiv[] = {
+	[0]	= {
+		.clk	= {
+			.name		= "pwm-tdiv",
+			.parent		= &clk_timer_scaler[0],
+			.get_rate	= clk_pwm_tdiv_get_rate,
+			.set_rate	= clk_pwm_tdiv_set_rate,
+			.round_rate	= clk_pwm_tdiv_round_rate,
+		},
+	},
+	[1]	= {
+		.clk	= {
+			.name		= "pwm-tdiv",
+			.parent		= &clk_timer_scaler[0],
+			.get_rate	= clk_pwm_tdiv_get_rate,
+			.set_rate	= clk_pwm_tdiv_set_rate,
+			.round_rate	= clk_pwm_tdiv_round_rate,
+		}
+	},
+	[2]	= {
+		.clk	= {
+			.name		= "pwm-tdiv",
+			.parent		= &clk_timer_scaler[1],
+			.get_rate	= clk_pwm_tdiv_get_rate,
+			.set_rate	= clk_pwm_tdiv_set_rate,
+			.round_rate	= clk_pwm_tdiv_round_rate,
+		},
+	},
+	[3]	= {
+		.clk	= {
+			.name		= "pwm-tdiv",
+			.parent		= &clk_timer_scaler[1],
+			.get_rate	= clk_pwm_tdiv_get_rate,
+			.set_rate	= clk_pwm_tdiv_set_rate,
+			.round_rate	= clk_pwm_tdiv_round_rate,
+		},
+	},
+	[4]	= {
+		.clk	= {
+			.name		= "pwm-tdiv",
+			.parent		= &clk_timer_scaler[1],
+			.get_rate	= clk_pwm_tdiv_get_rate,
+			.set_rate	= clk_pwm_tdiv_set_rate,
+			.round_rate	= clk_pwm_tdiv_round_rate,
+		},
+	},
+};
+
+static int __init clk_pwm_tdiv_register(unsigned int id)
+{
+	struct pwm_tdiv_clk *divclk = &clk_timer_tdiv[id];
+	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
+
+	tcfg1 >>= S3C2410_TCFG1_SHIFT(id);
+	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
+
+	divclk->clk.id = id;
+	divclk->divisor = tcfg_to_divisor(tcfg1);
+
+	return s3c24xx_register_clock(&divclk->clk);
+}
+
+static inline struct clk *s3c24xx_pwmclk_tclk(unsigned int id)
+{
+	return (id >= 2) ? &clk_timer_tclk[1] : &clk_timer_tclk[0];
+}
+
+static inline struct clk *s3c24xx_pwmclk_tdiv(unsigned int id)
+{
+	return &clk_timer_tdiv[id].clk;
+}
+
+static int clk_pwm_tin_set_parent(struct clk *clk, struct clk *parent)
+{
+	unsigned int id = clk->id;
+	unsigned long tcfg1;
+	unsigned long flags;
+	unsigned long bits;
+	unsigned long shift = S3C2410_TCFG1_SHIFT(id);
+
+	if (parent == s3c24xx_pwmclk_tclk(id))
+		bits = S3C2410_TCFG1_MUX_TCLK << shift;
+	else if (parent == s3c24xx_pwmclk_tdiv(id))
+		bits = clk_pwm_tdiv_bits(to_tdiv(clk)) << shift;
+	else
+		return -EINVAL;
+
+	clk->parent = parent;
+
+	local_irq_save(flags);
+
+	tcfg1 = __raw_readl(S3C2410_TCFG1);
+	tcfg1 &= ~(S3C2410_TCFG1_MUX_MASK << shift);
+	__raw_writel(tcfg1 | bits, S3C2410_TCFG1);
+
+	local_irq_restore(flags);
+
+	return 0;
+}
+
+static struct clk clk_tin[] = {
+	[0]	= {
+		.name		= "pwm-tin",
+		.id		= 0,
+		.set_parent	= clk_pwm_tin_set_parent,
+	},
+	[1]	= {
+		.name		= "pwm-tin",
+		.id		= 1,
+		.set_parent	= clk_pwm_tin_set_parent,
+	},
+	[2]	= {
+		.name		= "pwm-tin",
+		.id		= 2,
+		.set_parent	= clk_pwm_tin_set_parent,
+	},
+	[3]	= {
+		.name		= "pwm-tin",
+		.id		= 3,
+		.set_parent	= clk_pwm_tin_set_parent,
+	},
+	[4]	= {
+		.name		= "pwm-tin",
+		.id		= 4,
+		.set_parent	= clk_pwm_tin_set_parent,
+	},
+};
+
+static __init int clk_pwm_tin_register(struct clk *pwm)
+{
+	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
+	unsigned int id = pwm->id;
+
+	struct clk *parent;
+	int ret;
+
+	ret = s3c24xx_register_clock(pwm);
+	if (ret < 0)
+		return ret;
+
+	tcfg1 >>= S3C2410_TCFG1_SHIFT(id);
+	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
+
+	if (tcfg1 == S3C2410_TCFG1_MUX_TCLK)
+		parent = s3c24xx_pwmclk_tclk(id);
+	else
+		parent = s3c24xx_pwmclk_tdiv(id);
+
+	return clk_set_parent(pwm, parent);
+}
+
+static __init int s3c24xx_pwmclk_init(void)
+{
+	struct clk *clk_timers;
+	unsigned int clk;
+	int ret;
+
+	clk_timers = clk_get(NULL, "timers");
+	if (IS_ERR(clk_timers)) {
+		printk(KERN_ERR "%s: no parent clock\n", __func__);
+		return -EINVAL;
+	}
+
+	for (clk = 0; clk < ARRAY_SIZE(clk_timer_scaler); clk++) {
+		clk_timer_scaler[clk].parent = clk_timers;
+		ret = s3c24xx_register_clock(&clk_timer_scaler[clk]);
+		if (ret < 0) {
+			printk(KERN_ERR "error adding pwm scaler%d clock\n", clk);
+			goto err;
+		}
+	}
+
+	for (clk = 0; clk < ARRAY_SIZE(clk_timer_tclk); clk++) {
+		ret = s3c24xx_register_clock(&clk_timer_tclk[clk]);
+		if (ret < 0) {
+			printk(KERN_ERR "error adding pww tclk%d\n", clk);
+			goto err;
+		}
+	}
+
+	for (clk = 0; clk < ARRAY_SIZE(clk_timer_tdiv); clk++) {
+		ret = clk_pwm_tdiv_register(clk);
+		if (ret < 0) {
+			printk(KERN_ERR "error adding pwm%d tdiv clock\n", clk);
+			goto err;
+		}
+	}
+
+	for (clk = 0; clk < ARRAY_SIZE(clk_tin); clk++) {
+		ret = clk_pwm_tin_register(&clk_tin[clk]);
+		if (ret < 0) {
+			printk(KERN_ERR "error adding pwm%d tin clock\n", clk);
+			goto err;
+		}
+	}
+
+	return 0;
+
+ err:
+	return ret;
+}
+
+arch_initcall(s3c24xx_pwmclk_init);
diff --git a/arch/arm/plat-s3c24xx/pwm.c b/arch/arm/plat-s3c24xx/pwm.c
new file mode 100644
index 000000000000..18c4bdc49a05
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/pwm.c
@@ -0,0 +1,402 @@
+/* arch/arm/plat-s3c24xx/pwm.c
+ *
+ * Copyright (c) 2007 Ben Dooks
+ * Copyright (c) 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org>
+ *
+ * S3C24XX PWM device core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/pwm.h>
+
+#include <asm/plat-s3c/regs-timer.h>
+
+struct pwm_device {
+	struct list_head	 list;
+	struct platform_device	*pdev;
+
+	struct clk		*clk_div;
+	struct clk		*clk;
+	const char		*label;
+
+	unsigned int		 period_ns;
+	unsigned int		 duty_ns;
+
+	unsigned char		 tcon_base;
+	unsigned char		 running;
+	unsigned char		 use_count;
+	unsigned char		 pwm_id;
+};
+
+#define pwm_dbg(_pwm, msg...) dev_info(&(_pwm)->pdev->dev, msg)
+
+static struct clk *clk_scaler[2];
+
+/* Standard setup for a timer block. */
+
+#define TIMER_RESOURCE_SIZE (1)
+
+#define TIMER_RESOURCE(_tmr, _irq)			\
+	(struct resource [TIMER_RESOURCE_SIZE]) {	\
+		[0] = {					\
+			.start	= _irq,			\
+			.end	= _irq,			\
+			.flags	= IORESOURCE_IRQ	\
+		}					\
+	}
+
+#define DEFINE_TIMER(_tmr_no, _irq)			\
+	.name		= "s3c24xx-pwm",		\
+	.id		= _tmr_no,			\
+	.num_resources	= TIMER_RESOURCE_SIZE,		\
+	.resource	= TIMER_RESOURCE(_tmr_no, _irq),	\
+
+/* since we already have an static mapping for the timer, we do not
+ * bother setting any IO resource for the base.
+ */
+
+struct platform_device s3c_device_timer[] = {
+	[0] = { DEFINE_TIMER(0, IRQ_TIMER0) },
+	[1] = { DEFINE_TIMER(1, IRQ_TIMER1) },
+	[2] = { DEFINE_TIMER(2, IRQ_TIMER2) },
+	[3] = { DEFINE_TIMER(3, IRQ_TIMER3) },
+	[4] = { DEFINE_TIMER(4, IRQ_TIMER4) },
+};
+
+static inline int pwm_is_tdiv(struct pwm_device *pwm)
+{
+	return clk_get_parent(pwm->clk) == pwm->clk_div;
+}
+
+static DEFINE_MUTEX(pwm_lock);
+static LIST_HEAD(pwm_list);
+
+struct pwm_device *pwm_request(int pwm_id, const char *label)
+{
+	struct pwm_device *pwm;
+	int found = 0;
+
+	mutex_lock(&pwm_lock);
+
+	list_for_each_entry(pwm, &pwm_list, list) {
+		if (pwm->pwm_id == pwm_id) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (found) {
+		if (pwm->use_count == 0) {
+			pwm->use_count = 1;
+			pwm->label = label;
+		} else
+			pwm = ERR_PTR(-EBUSY);
+	} else
+		pwm = ERR_PTR(-ENOENT);
+
+	mutex_unlock(&pwm_lock);
+	return pwm;
+}
+
+EXPORT_SYMBOL(pwm_request);
+
+
+void pwm_free(struct pwm_device *pwm)
+{
+	mutex_lock(&pwm_lock);
+
+	if (pwm->use_count) {
+		pwm->use_count--;
+		pwm->label = NULL;
+	} else
+		printk(KERN_ERR "PWM%d device already freed\n", pwm->pwm_id);
+
+	mutex_unlock(&pwm_lock);
+}
+
+EXPORT_SYMBOL(pwm_free);
+
+#define pwm_tcon_start(pwm) (1 << (pwm->tcon_base + 0))
+#define pwm_tcon_invert(pwm) (1 << (pwm->tcon_base + 2))
+#define pwm_tcon_autoreload(pwm) (1 << (pwm->tcon_base + 3))
+#define pwm_tcon_manulupdate(pwm) (1 << (pwm->tcon_base + 1))
+
+int pwm_enable(struct pwm_device *pwm)
+{
+	unsigned long flags;
+	unsigned long tcon;
+
+	local_irq_save(flags);
+
+	tcon = __raw_readl(S3C2410_TCON);
+	tcon |= pwm_tcon_start(pwm);
+	__raw_writel(tcon, S3C2410_TCON);
+
+	local_irq_restore(flags);
+
+	pwm->running = 1;
+	return 0;
+}
+
+EXPORT_SYMBOL(pwm_enable);
+
+void pwm_disable(struct pwm_device *pwm)
+{
+	unsigned long flags;
+	unsigned long tcon;
+
+	local_irq_save(flags);
+
+	tcon = __raw_readl(S3C2410_TCON);
+	tcon &= ~pwm_tcon_start(pwm);
+	__raw_writel(tcon, S3C2410_TCON);
+
+	local_irq_restore(flags);
+
+	pwm->running = 0;
+}
+
+EXPORT_SYMBOL(pwm_disable);
+
+unsigned long pwm_calc_tin(struct pwm_device *pwm, unsigned long freq)
+{
+	unsigned long tin_parent_rate;
+	unsigned int div;
+
+	tin_parent_rate = clk_get_rate(clk_get_parent(pwm->clk_div));
+	pwm_dbg(pwm, "tin parent at %lu\n", tin_parent_rate);
+
+	for (div = 2; div <= 16; div *= 2) {
+		if ((tin_parent_rate / (div << 16)) < freq)
+			return tin_parent_rate / div;
+	}
+
+	return tin_parent_rate / 16;
+}
+
+#define NS_IN_HZ (1000000000UL)
+
+int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
+{
+	unsigned long tin_rate;
+	unsigned long tin_ns;
+	unsigned long period;
+	unsigned long flags;
+	unsigned long tcon;
+	unsigned long tcnt;
+	long tcmp;
+
+	/* We currently avoid using 64bit arithmetic by using the
+	 * fact that anything faster than 1Hz is easily representable
+	 * by 32bits. */
+
+	if (period_ns > NS_IN_HZ || duty_ns > NS_IN_HZ)
+		return -ERANGE;
+
+	if (duty_ns > period_ns)
+		return -EINVAL;
+
+	if (period_ns == pwm->period_ns &&
+	    duty_ns == pwm->duty_ns)
+		return 0;
+
+	/* The TCMP and TCNT can be read without a lock, they're not
+	 * shared between the timers. */
+
+	tcmp = __raw_readl(S3C2410_TCMPB(pwm->pwm_id));
+	tcnt = __raw_readl(S3C2410_TCNTB(pwm->pwm_id));
+
+	period = NS_IN_HZ / period_ns;
+
+	pwm_dbg(pwm, "duty_ns=%d, period_ns=%d (%lu)\n",
+		duty_ns, period_ns, period);
+
+	/* Check to see if we are changing the clock rate of the PWM */
+
+	if (pwm->period_ns != period_ns) {
+		if (pwm_is_tdiv(pwm)) {
+			tin_rate = pwm_calc_tin(pwm, period);
+			clk_set_rate(pwm->clk_div, tin_rate);
+		} else
+			tin_rate = clk_get_rate(pwm->clk);
+
+		pwm->period_ns = period_ns;
+
+		pwm_dbg(pwm, "tin_rate=%lu\n", tin_rate);
+
+		tin_ns = NS_IN_HZ / tin_rate;
+		tcnt = period_ns / tin_ns;
+	} else
+		tin_ns = NS_IN_HZ / clk_get_rate(pwm->clk);
+
+	/* Note, counters count down */
+
+	tcmp = duty_ns / tin_ns;
+	tcmp = tcnt - tcmp;
+
+	pwm_dbg(pwm, "tin_ns=%lu, tcmp=%ld/%lu\n", tin_ns, tcmp, tcnt);
+
+	if (tcmp < 0)
+		tcmp = 0;
+
+	/* Update the PWM register block. */
+
+	local_irq_save(flags);
+
+	__raw_writel(tcmp, S3C2410_TCMPB(pwm->pwm_id));
+	__raw_writel(tcnt, S3C2410_TCNTB(pwm->pwm_id));
+
+	tcon = __raw_readl(S3C2410_TCON);
+	tcon |= pwm_tcon_manulupdate(pwm);
+	tcon |= pwm_tcon_autoreload(pwm);
+	__raw_writel(tcon, S3C2410_TCON);
+
+	tcon &= ~pwm_tcon_manulupdate(pwm);
+	__raw_writel(tcon, S3C2410_TCON);
+
+	local_irq_restore(flags);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(pwm_config);
+
+static int pwm_register(struct pwm_device *pwm)
+{
+	pwm->duty_ns = -1;
+	pwm->period_ns = -1;
+
+	mutex_lock(&pwm_lock);
+	list_add_tail(&pwm->list, &pwm_list);
+	mutex_unlock(&pwm_lock);
+
+	return 0;
+}
+
+static int s3c_pwm_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct pwm_device *pwm;
+	unsigned long flags;
+	unsigned long tcon;
+	unsigned int id = pdev->id;
+	int ret;
+
+	if (id == 4) {
+		dev_err(dev, "TIMER4 is currently not supported\n");
+		return -ENXIO;
+	}
+
+	pwm = kzalloc(sizeof(struct pwm_device), GFP_KERNEL);
+	if (pwm == NULL) {
+		dev_err(dev, "failed to allocate pwm_device\n");
+		return -ENOMEM;
+	}
+
+	pwm->pdev = pdev;
+	pwm->pwm_id = id;
+
+	/* calculate base of control bits in TCON */
+	pwm->tcon_base = id == 0 ? 0 : (id * 4) + 4;
+
+	pwm->clk = clk_get(dev, "pwm-tin");
+	if (IS_ERR(pwm->clk)) {
+		dev_err(dev, "failed to get pwm tin clk\n");
+		ret = PTR_ERR(pwm->clk);
+		goto err_alloc;
+	}
+
+	pwm->clk_div = clk_get(dev, "pwm-tdiv");
+	if (IS_ERR(pwm->clk_div)) {
+		dev_err(dev, "failed to get pwm tdiv clk\n");
+		ret = PTR_ERR(pwm->clk_div);
+		goto err_clk_tin;
+	}
+
+	local_irq_save(flags);
+
+	tcon = __raw_readl(S3C2410_TCON);
+	tcon |= pwm_tcon_invert(pwm);
+	__raw_writel(tcon, S3C2410_TCON);
+
+	local_irq_restore(flags);
+
+
+	ret = pwm_register(pwm);
+	if (ret) {
+		dev_err(dev, "failed to register pwm\n");
+		goto err_clk_tdiv;
+	}
+
+	pwm_dbg(pwm, "config bits %02x\n",
+		(__raw_readl(S3C2410_TCON) >> pwm->tcon_base) & 0x0f);
+
+	dev_info(dev, "tin at %lu, tdiv at %lu, tin=%sclk, base %d\n",
+		 clk_get_rate(pwm->clk),
+		 clk_get_rate(pwm->clk_div),
+		 pwm_is_tdiv(pwm) ? "div" : "ext", pwm->tcon_base);
+
+	platform_set_drvdata(pdev, pwm);
+	return 0;
+
+ err_clk_tdiv:
+	clk_put(pwm->clk_div);
+
+ err_clk_tin:
+	clk_put(pwm->clk);
+
+ err_alloc:
+	kfree(pwm);
+	return ret;
+}
+
+static int s3c_pwm_remove(struct platform_device *pdev)
+{
+	struct pwm_device *pwm = platform_get_drvdata(pdev);
+
+	clk_put(pwm->clk_div);
+	clk_put(pwm->clk);
+	kfree(pwm);
+
+	return 0;
+}
+
+static struct platform_driver s3c_pwm_driver = {
+	.driver		= {
+		.name	= "s3c24xx-pwm",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= s3c_pwm_probe,
+	.remove		= __devexit_p(s3c_pwm_remove),
+};
+
+static int __init pwm_init(void)
+{
+	int ret;
+
+	clk_scaler[0] = clk_get(NULL, "pwm-scaler0");
+	clk_scaler[1] = clk_get(NULL, "pwm-scaler1");
+
+	if (IS_ERR(clk_scaler[0]) || IS_ERR(clk_scaler[1])) {
+		printk(KERN_ERR "%s: failed to get scaler clocks\n", __func__);
+		return -EINVAL;
+	}
+
+	ret = platform_driver_register(&s3c_pwm_driver);
+	if (ret)
+		printk(KERN_ERR "%s: failed to add pwm driver\n", __func__);
+
+	return ret;
+}
+
+arch_initcall(pwm_init);