14 files changed, 135 insertions, 604 deletions

diff --git a/arch/mips/include/asm/mach-jz4740/platform.h b/arch/mips/include/asm/mach-jz4740/platform.h
index 564ab81d6cdc..163e81db880d 100644
--- a/arch/mips/include/asm/mach-jz4740/platform.h
+++ b/arch/mips/include/asm/mach-jz4740/platform.h
@@ -31,6 +31,7 @@ extern struct platform_device jz4740_pcm_device;
 extern struct platform_device jz4740_codec_device;
 extern struct platform_device jz4740_adc_device;
 extern struct platform_device jz4740_wdt_device;
+extern struct platform_device jz4740_pwm_device;
 
 void jz4740_serial_device_register(void);
 
diff --git a/arch/mips/include/asm/mach-jz4740/timer.h b/arch/mips/include/asm/mach-jz4740/timer.h
index 9baa03ce748c..a7759fb1f73d 100644
--- a/arch/mips/include/asm/mach-jz4740/timer.h
+++ b/arch/mips/include/asm/mach-jz4740/timer.h
@@ -16,7 +16,120 @@
 #ifndef __ASM_MACH_JZ4740_TIMER
 #define __ASM_MACH_JZ4740_TIMER
 
+#define JZ_REG_TIMER_STOP		0x0C
+#define JZ_REG_TIMER_STOP_SET		0x1C
+#define JZ_REG_TIMER_STOP_CLEAR		0x2C
+#define JZ_REG_TIMER_ENABLE		0x00
+#define JZ_REG_TIMER_ENABLE_SET		0x04
+#define JZ_REG_TIMER_ENABLE_CLEAR	0x08
+#define JZ_REG_TIMER_FLAG		0x10
+#define JZ_REG_TIMER_FLAG_SET		0x14
+#define JZ_REG_TIMER_FLAG_CLEAR		0x18
+#define JZ_REG_TIMER_MASK		0x20
+#define JZ_REG_TIMER_MASK_SET		0x24
+#define JZ_REG_TIMER_MASK_CLEAR		0x28
+
+#define JZ_REG_TIMER_DFR(x) (((x) * 0x10) + 0x30)
+#define JZ_REG_TIMER_DHR(x) (((x) * 0x10) + 0x34)
+#define JZ_REG_TIMER_CNT(x) (((x) * 0x10) + 0x38)
+#define JZ_REG_TIMER_CTRL(x) (((x) * 0x10) + 0x3C)
+
+#define JZ_TIMER_IRQ_HALF(x) BIT((x) + 0x10)
+#define JZ_TIMER_IRQ_FULL(x) BIT(x)
+
+#define JZ_TIMER_CTRL_PWM_ABBRUPT_SHUTDOWN	BIT(9)
+#define JZ_TIMER_CTRL_PWM_ACTIVE_LOW		BIT(8)
+#define JZ_TIMER_CTRL_PWM_ENABLE		BIT(7)
+#define JZ_TIMER_CTRL_PRESCALE_MASK		0x1c
+#define JZ_TIMER_CTRL_PRESCALE_OFFSET		0x3
+#define JZ_TIMER_CTRL_PRESCALE_1		(0 << 3)
+#define JZ_TIMER_CTRL_PRESCALE_4		(1 << 3)
+#define JZ_TIMER_CTRL_PRESCALE_16		(2 << 3)
+#define JZ_TIMER_CTRL_PRESCALE_64		(3 << 3)
+#define JZ_TIMER_CTRL_PRESCALE_256		(4 << 3)
+#define JZ_TIMER_CTRL_PRESCALE_1024		(5 << 3)
+
+#define JZ_TIMER_CTRL_PRESCALER(x) ((x) << JZ_TIMER_CTRL_PRESCALE_OFFSET)
+
+#define JZ_TIMER_CTRL_SRC_EXT		BIT(2)
+#define JZ_TIMER_CTRL_SRC_RTC		BIT(1)
+#define JZ_TIMER_CTRL_SRC_PCLK		BIT(0)
+
+extern void __iomem *jz4740_timer_base;
+void __init jz4740_timer_init(void);
+
 void jz4740_timer_enable_watchdog(void);
 void jz4740_timer_disable_watchdog(void);
 
+static inline void jz4740_timer_stop(unsigned int timer)
+{
+	writel(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
+}
+
+static inline void jz4740_timer_start(unsigned int timer)
+{
+	writel(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR);
+}
+
+static inline bool jz4740_timer_is_enabled(unsigned int timer)
+{
+	return readb(jz4740_timer_base + JZ_REG_TIMER_ENABLE) & BIT(timer);
+}
+
+static inline void jz4740_timer_enable(unsigned int timer)
+{
+	writeb(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_ENABLE_SET);
+}
+
+static inline void jz4740_timer_disable(unsigned int timer)
+{
+	writeb(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_ENABLE_CLEAR);
+}
+
+static inline void jz4740_timer_set_period(unsigned int timer, uint16_t period)
+{
+	writew(period, jz4740_timer_base + JZ_REG_TIMER_DFR(timer));
+}
+
+static inline void jz4740_timer_set_duty(unsigned int timer, uint16_t duty)
+{
+	writew(duty, jz4740_timer_base + JZ_REG_TIMER_DHR(timer));
+}
+
+static inline void jz4740_timer_set_count(unsigned int timer, uint16_t count)
+{
+	writew(count, jz4740_timer_base + JZ_REG_TIMER_CNT(timer));
+}
+
+static inline uint16_t jz4740_timer_get_count(unsigned int timer)
+{
+	return readw(jz4740_timer_base + JZ_REG_TIMER_CNT(timer));
+}
+
+static inline void jz4740_timer_ack_full(unsigned int timer)
+{
+	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_FLAG_CLEAR);
+}
+
+static inline void jz4740_timer_irq_full_enable(unsigned int timer)
+{
+	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_FLAG_CLEAR);
+	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_MASK_CLEAR);
+}
+
+static inline void jz4740_timer_irq_full_disable(unsigned int timer)
+{
+	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_MASK_SET);
+}
+
+static inline void jz4740_timer_set_ctrl(unsigned int timer, uint16_t ctrl)
+{
+	writew(ctrl, jz4740_timer_base + JZ_REG_TIMER_CTRL(timer));
+}
+
+static inline uint16_t jz4740_timer_get_ctrl(unsigned int timer)
+{
+	return readw(jz4740_timer_base + JZ_REG_TIMER_CTRL(timer));
+}
+
 #endif
diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
index 3e7141f0746c..468903053883 100644
--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -7,6 +7,3 @@ config JZ4740_QI_LB60
 	bool "Qi Hardware Ben NanoNote"
 
 endchoice
-
-config HAVE_PWM
-	bool
diff --git a/arch/mips/jz4740/Makefile b/arch/mips/jz4740/Makefile
index e44abea9c209..63bad0e491d0 100644
--- a/arch/mips/jz4740/Makefile
+++ b/arch/mips/jz4740/Makefile
@@ -5,7 +5,7 @@
 # Object file lists.
 
 obj-y += prom.o irq.o time.o reset.o setup.o dma.o \
-	gpio.o clock.o platform.o timer.o pwm.o serial.o
+	gpio.o clock.o platform.o timer.o serial.o
 
 obj-$(CONFIG_DEBUG_FS) += clock-debugfs.o
 
diff --git a/arch/mips/jz4740/board-qi_lb60.c b/arch/mips/jz4740/board-qi_lb60.c
index 9a3d9de4d04e..43d964d36288 100644
--- a/arch/mips/jz4740/board-qi_lb60.c
+++ b/arch/mips/jz4740/board-qi_lb60.c
@@ -437,6 +437,7 @@ static struct platform_device *jz_platform_devices[] __initdata = {
 	&jz4740_codec_device,
 	&jz4740_rtc_device,
 	&jz4740_adc_device,
+	&jz4740_pwm_device,
 	&qi_lb60_gpio_keys,
 	&qi_lb60_pwm_beeper,
 	&qi_lb60_charger_device,
diff --git a/arch/mips/jz4740/platform.c b/arch/mips/jz4740/platform.c
index e342ed4cbd43..6d14dcdbd908 100644
--- a/arch/mips/jz4740/platform.c
+++ b/arch/mips/jz4740/platform.c
@@ -323,3 +323,9 @@ struct platform_device jz4740_wdt_device = {
 	.num_resources = ARRAY_SIZE(jz4740_wdt_resources),
 	.resource      = jz4740_wdt_resources,
 };
+
+/* PWM */
+struct platform_device jz4740_pwm_device = {
+	.name = "jz4740-pwm",
+	.id   = -1,
+};
diff --git a/arch/mips/jz4740/pwm.c b/arch/mips/jz4740/pwm.c
deleted file mode 100644
index a26a6faec9a6..000000000000
--- a/arch/mips/jz4740/pwm.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
- *  JZ4740 platform PWM support
- *
- *  This program is free software; you can redistribute it and/or modify it
- *  under  the terms of the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/kernel.h>
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/pwm.h>
-#include <linux/gpio.h>
-
-#include <asm/mach-jz4740/gpio.h>
-#include "timer.h"
-
-static struct clk *jz4740_pwm_clk;
-
-DEFINE_MUTEX(jz4740_pwm_mutex);
-
-struct pwm_device {
-	unsigned int id;
-	unsigned int gpio;
-	bool used;
-};
-
-static struct pwm_device jz4740_pwm_list[] = {
-	{ 2, JZ_GPIO_PWM2, false },
-	{ 3, JZ_GPIO_PWM3, false },
-	{ 4, JZ_GPIO_PWM4, false },
-	{ 5, JZ_GPIO_PWM5, false },
-	{ 6, JZ_GPIO_PWM6, false },
-	{ 7, JZ_GPIO_PWM7, false },
-};
-
-struct pwm_device *pwm_request(int id, const char *label)
-{
-	int ret = 0;
-	struct pwm_device *pwm;
-
-	if (id < 2 || id > 7 || !jz4740_pwm_clk)
-		return ERR_PTR(-ENODEV);
-
-	mutex_lock(&jz4740_pwm_mutex);
-
-	pwm = &jz4740_pwm_list[id - 2];
-	if (pwm->used)
-		ret = -EBUSY;
-	else
-		pwm->used = true;
-
-	mutex_unlock(&jz4740_pwm_mutex);
-
-	if (ret)
-		return ERR_PTR(ret);
-
-	ret = gpio_request(pwm->gpio, label);
-
-	if (ret) {
-		printk(KERN_ERR "Failed to request pwm gpio: %d\n", ret);
-		pwm->used = false;
-		return ERR_PTR(ret);
-	}
-
-	jz_gpio_set_function(pwm->gpio, JZ_GPIO_FUNC_PWM);
-
-	jz4740_timer_start(id);
-
-	return pwm;
-}
-
-void pwm_free(struct pwm_device *pwm)
-{
-	pwm_disable(pwm);
-	jz4740_timer_set_ctrl(pwm->id, 0);
-
-	jz_gpio_set_function(pwm->gpio, JZ_GPIO_FUNC_NONE);
-	gpio_free(pwm->gpio);
-
-	jz4740_timer_stop(pwm->id);
-
-	pwm->used = false;
-}
-
-int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
-{
-	unsigned long long tmp;
-	unsigned long period, duty;
-	unsigned int prescaler = 0;
-	unsigned int id = pwm->id;
-	uint16_t ctrl;
-	bool is_enabled;
-
-	if (duty_ns < 0 || duty_ns > period_ns)
-		return -EINVAL;
-
-	tmp = (unsigned long long)clk_get_rate(jz4740_pwm_clk) * period_ns;
-	do_div(tmp, 1000000000);
-	period = tmp;
-
-	while (period > 0xffff && prescaler < 6) {
-		period >>= 2;
-		++prescaler;
-	}
-
-	if (prescaler == 6)
-		return -EINVAL;
-
-	tmp = (unsigned long long)period * duty_ns;
-	do_div(tmp, period_ns);
-	duty = period - tmp;
-
-	if (duty >= period)
-		duty = period - 1;
-
-	is_enabled = jz4740_timer_is_enabled(id);
-	if (is_enabled)
-		pwm_disable(pwm);
-
-	jz4740_timer_set_count(id, 0);
-	jz4740_timer_set_duty(id, duty);
-	jz4740_timer_set_period(id, period);
-
-	ctrl = JZ_TIMER_CTRL_PRESCALER(prescaler) | JZ_TIMER_CTRL_SRC_EXT |
-		JZ_TIMER_CTRL_PWM_ABBRUPT_SHUTDOWN;
-
-	jz4740_timer_set_ctrl(id, ctrl);
-
-	if (is_enabled)
-		pwm_enable(pwm);
-
-	return 0;
-}
-
-int pwm_enable(struct pwm_device *pwm)
-{
-	uint32_t ctrl = jz4740_timer_get_ctrl(pwm->id);
-
-	ctrl |= JZ_TIMER_CTRL_PWM_ENABLE;
-	jz4740_timer_set_ctrl(pwm->id, ctrl);
-	jz4740_timer_enable(pwm->id);
-
-	return 0;
-}
-
-void pwm_disable(struct pwm_device *pwm)
-{
-	uint32_t ctrl = jz4740_timer_get_ctrl(pwm->id);
-
-	ctrl &= ~JZ_TIMER_CTRL_PWM_ENABLE;
-	jz4740_timer_disable(pwm->id);
-	jz4740_timer_set_ctrl(pwm->id, ctrl);
-}
-
-static int __init jz4740_pwm_init(void)
-{
-	int ret = 0;
-
-	jz4740_pwm_clk = clk_get(NULL, "ext");
-
-	if (IS_ERR(jz4740_pwm_clk)) {
-		ret = PTR_ERR(jz4740_pwm_clk);
-		jz4740_pwm_clk = NULL;
-	}
-
-	return ret;
-}
-subsys_initcall(jz4740_pwm_init);
diff --git a/arch/mips/jz4740/time.c b/arch/mips/jz4740/time.c
index f83c2dd07a27..39bb4bbf43e7 100644
--- a/arch/mips/jz4740/time.c
+++ b/arch/mips/jz4740/time.c
@@ -20,10 +20,10 @@
 #include <linux/clockchips.h>
 
 #include <asm/mach-jz4740/irq.h>
+#include <asm/mach-jz4740/timer.h>
 #include <asm/time.h>
 
 #include "clock.h"
-#include "timer.h"
 
 #define TIMER_CLOCKEVENT 0
 #define TIMER_CLOCKSOURCE 1
diff --git a/arch/mips/jz4740/timer.c b/arch/mips/jz4740/timer.c
index 654d5c3900b6..22f11d73a17d 100644
--- a/arch/mips/jz4740/timer.c
+++ b/arch/mips/jz4740/timer.c
@@ -17,11 +17,11 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 
-#include "timer.h"
-
 #include <asm/mach-jz4740/base.h>
+#include <asm/mach-jz4740/timer.h>
 
 void __iomem *jz4740_timer_base;
+EXPORT_SYMBOL_GPL(jz4740_timer_base);
 
 void jz4740_timer_enable_watchdog(void)
 {
diff --git a/arch/mips/jz4740/timer.h b/arch/mips/jz4740/timer.h
deleted file mode 100644
index fca3994f2e6d..000000000000
--- a/arch/mips/jz4740/timer.h
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
- *  JZ4740 platform timer support
- *
- *  This program is free software; you can redistribute it and/or modify it
- *  under  the terms of the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#ifndef __MIPS_JZ4740_TIMER_H__
-#define __MIPS_JZ4740_TIMER_H__
-
-#include <linux/module.h>
-#include <linux/io.h>
-
-#define JZ_REG_TIMER_STOP		0x0C
-#define JZ_REG_TIMER_STOP_SET		0x1C
-#define JZ_REG_TIMER_STOP_CLEAR		0x2C
-#define JZ_REG_TIMER_ENABLE		0x00
-#define JZ_REG_TIMER_ENABLE_SET		0x04
-#define JZ_REG_TIMER_ENABLE_CLEAR	0x08
-#define JZ_REG_TIMER_FLAG		0x10
-#define JZ_REG_TIMER_FLAG_SET		0x14
-#define JZ_REG_TIMER_FLAG_CLEAR		0x18
-#define JZ_REG_TIMER_MASK		0x20
-#define JZ_REG_TIMER_MASK_SET		0x24
-#define JZ_REG_TIMER_MASK_CLEAR		0x28
-
-#define JZ_REG_TIMER_DFR(x) (((x) * 0x10) + 0x30)
-#define JZ_REG_TIMER_DHR(x) (((x) * 0x10) + 0x34)
-#define JZ_REG_TIMER_CNT(x) (((x) * 0x10) + 0x38)
-#define JZ_REG_TIMER_CTRL(x) (((x) * 0x10) + 0x3C)
-
-#define JZ_TIMER_IRQ_HALF(x) BIT((x) + 0x10)
-#define JZ_TIMER_IRQ_FULL(x) BIT(x)
-
-#define JZ_TIMER_CTRL_PWM_ABBRUPT_SHUTDOWN	BIT(9)
-#define JZ_TIMER_CTRL_PWM_ACTIVE_LOW		BIT(8)
-#define JZ_TIMER_CTRL_PWM_ENABLE		BIT(7)
-#define JZ_TIMER_CTRL_PRESCALE_MASK		0x1c
-#define JZ_TIMER_CTRL_PRESCALE_OFFSET		0x3
-#define JZ_TIMER_CTRL_PRESCALE_1		(0 << 3)
-#define JZ_TIMER_CTRL_PRESCALE_4		(1 << 3)
-#define JZ_TIMER_CTRL_PRESCALE_16		(2 << 3)
-#define JZ_TIMER_CTRL_PRESCALE_64		(3 << 3)
-#define JZ_TIMER_CTRL_PRESCALE_256		(4 << 3)
-#define JZ_TIMER_CTRL_PRESCALE_1024		(5 << 3)
-
-#define JZ_TIMER_CTRL_PRESCALER(x) ((x) << JZ_TIMER_CTRL_PRESCALE_OFFSET)
-
-#define JZ_TIMER_CTRL_SRC_EXT		BIT(2)
-#define JZ_TIMER_CTRL_SRC_RTC		BIT(1)
-#define JZ_TIMER_CTRL_SRC_PCLK		BIT(0)
-
-extern void __iomem *jz4740_timer_base;
-void __init jz4740_timer_init(void);
-
-static inline void jz4740_timer_stop(unsigned int timer)
-{
-	writel(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
-}
-
-static inline void jz4740_timer_start(unsigned int timer)
-{
-	writel(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR);
-}
-
-static inline bool jz4740_timer_is_enabled(unsigned int timer)
-{
-	return readb(jz4740_timer_base + JZ_REG_TIMER_ENABLE) & BIT(timer);
-}
-
-static inline void jz4740_timer_enable(unsigned int timer)
-{
-	writeb(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_ENABLE_SET);
-}
-
-static inline void jz4740_timer_disable(unsigned int timer)
-{
-	writeb(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_ENABLE_CLEAR);
-}
-
-
-static inline void jz4740_timer_set_period(unsigned int timer, uint16_t period)
-{
-	writew(period, jz4740_timer_base + JZ_REG_TIMER_DFR(timer));
-}
-
-static inline void jz4740_timer_set_duty(unsigned int timer, uint16_t duty)
-{
-	writew(duty, jz4740_timer_base + JZ_REG_TIMER_DHR(timer));
-}
-
-static inline void jz4740_timer_set_count(unsigned int timer, uint16_t count)
-{
-	writew(count, jz4740_timer_base + JZ_REG_TIMER_CNT(timer));
-}
-
-static inline uint16_t jz4740_timer_get_count(unsigned int timer)
-{
-	return readw(jz4740_timer_base + JZ_REG_TIMER_CNT(timer));
-}
-
-static inline void jz4740_timer_ack_full(unsigned int timer)
-{
-	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_FLAG_CLEAR);
-}
-
-static inline void jz4740_timer_irq_full_enable(unsigned int timer)
-{
-	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_FLAG_CLEAR);
-	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_MASK_CLEAR);
-}
-
-static inline void jz4740_timer_irq_full_disable(unsigned int timer)
-{
-	writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_MASK_SET);
-}
-
-static inline void jz4740_timer_set_ctrl(unsigned int timer, uint16_t ctrl)
-{
-	writew(ctrl, jz4740_timer_base + JZ_REG_TIMER_CTRL(timer));
-}
-
-static inline uint16_t jz4740_timer_get_ctrl(unsigned int timer)
-{
-	return readw(jz4740_timer_base + JZ_REG_TIMER_CTRL(timer));
-}
-
-#endif
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 1e638e75a6b7..35ee2bf66354 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -21,9 +21,6 @@ config UNICORE32
 	  designs licensed by PKUnity Ltd.
 	  Please see web page at <http://www.pkunity.com/>.
 
-config HAVE_PWM
-	bool
-
 config GENERIC_GPIO
 	def_bool y
 
@@ -106,7 +103,8 @@ config PUV3_DB0913
 
 config PUV3_NB0916
 	bool "NetBook board (0916)"
-	select HAVE_PWM
+	select PWM
+	select PWM_PUV3
 
 config PUV3_SMW0919
 	bool "Security Mini-Workstation board (0919)"
@@ -220,12 +218,6 @@ config PUV3_GPIO
 	select GPIO_SYSFS if EXPERIMENTAL
 	default y
 
-config PUV3_PWM
-	tristate
-	default BACKLIGHT_PWM
-	help
-	  Enable support for NB0916 PWM controllers
-
 if PUV3_NB0916
 
 menu "PKUnity NetBook-0916 Features"
diff --git a/arch/unicore32/include/mach/regs-ost.h b/arch/unicore32/include/mach/regs-ost.h
index 7b91fe698eed..4a85fb463848 100644
--- a/arch/unicore32/include/mach/regs-ost.h
+++ b/arch/unicore32/include/mach/regs-ost.h
@@ -33,18 +33,16 @@
  * Interrupt Enable Reg OST_OIER
  */
 #define OST_OIER	(PKUNITY_OST_BASE + 0x001C)
+
 /*
- * PWM Pulse Width Control Reg OST_PWMPWCR
- */
-#define OST_PWMPWCR	(PKUNITY_OST_BASE + 0x0080)
-/*
- * PWM Duty Cycle Control Reg OST_PWMDCCR
- */
-#define OST_PWMDCCR	(PKUNITY_OST_BASE + 0x0084)
-/*
- * PWM Period Control Reg OST_PWMPCR
+ * PWM Registers: IO base address: PKUNITY_OST_BASE + 0x80
+ *      PWCR: Pulse Width Control Reg
+ *      DCCR: Duty Cycle Control Reg
+ *      PCR: Period Control Reg
  */
-#define OST_PWMPCR	(PKUNITY_OST_BASE + 0x0088)
+#define OST_PWM_PWCR	(0x00)
+#define OST_PWM_DCCR	(0x04)
+#define OST_PWM_PCR 	(0x08)
 
 /*
  * Match detected 0 OST_OSSR_M0
diff --git a/arch/unicore32/kernel/Makefile b/arch/unicore32/kernel/Makefile
index 324010156958..fa497e0efe5a 100644
--- a/arch/unicore32/kernel/Makefile
+++ b/arch/unicore32/kernel/Makefile
@@ -16,7 +16,6 @@ obj-$(CONFIG_UNICORE_FPU_F64)	+= fpu-ucf64.o
 obj-$(CONFIG_ARCH_PUV3)		+= clock.o irq.o time.o
 
 obj-$(CONFIG_PUV3_GPIO)		+= gpio.o
-obj-$(CONFIG_PUV3_PWM)		+= pwm.o
 obj-$(CONFIG_PUV3_PM)		+= pm.o sleep.o
 obj-$(CONFIG_HIBERNATION)	+= hibernate.o hibernate_asm.o
 
diff --git a/arch/unicore32/kernel/pwm.c b/arch/unicore32/kernel/pwm.c
deleted file mode 100644
index 4615d51e3ba6..000000000000
--- a/arch/unicore32/kernel/pwm.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- * linux/arch/unicore32/kernel/pwm.c
- *
- * Code specific to PKUnity SoC and UniCore ISA
- *
- *	Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
- *	Copyright (C) 2001-2010 Guan Xuetao
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/pwm.h>
-
-#include <asm/div64.h>
-#include <mach/hardware.h>
-
-struct pwm_device {
-	struct list_head	node;
-	struct platform_device *pdev;
-
-	const char	*label;
-	struct clk	*clk;
-	int		clk_enabled;
-
-	unsigned int	use_count;
-	unsigned int	pwm_id;
-};
-
-/*
- * period_ns = 10^9 * (PRESCALE + 1) * (PV + 1) / PWM_CLK_RATE
- * duty_ns   = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
- */
-int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
-{
-	unsigned long long c;
-	unsigned long period_cycles, prescale, pv, dc;
-
-	if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
-		return -EINVAL;
-
-	c = clk_get_rate(pwm->clk);
-	c = c * period_ns;
-	do_div(c, 1000000000);
-	period_cycles = c;
-
-	if (period_cycles < 1)
-		period_cycles = 1;
-	prescale = (period_cycles - 1) / 1024;
-	pv = period_cycles / (prescale + 1) - 1;
-
-	if (prescale > 63)
-		return -EINVAL;
-
-	if (duty_ns == period_ns)
-		dc = OST_PWMDCCR_FDCYCLE;
-	else
-		dc = (pv + 1) * duty_ns / period_ns;
-
-	/* NOTE: the clock to PWM has to be enabled first
-	 * before writing to the registers
-	 */
-	clk_enable(pwm->clk);
-	OST_PWMPWCR = prescale;
-	OST_PWMDCCR = pv - dc;
-	OST_PWMPCR  = pv;
-	clk_disable(pwm->clk);
-
-	return 0;
-}
-EXPORT_SYMBOL(pwm_config);
-
-int pwm_enable(struct pwm_device *pwm)
-{
-	int rc = 0;
-
-	if (!pwm->clk_enabled) {
-		rc = clk_enable(pwm->clk);
-		if (!rc)
-			pwm->clk_enabled = 1;
-	}
-	return rc;
-}
-EXPORT_SYMBOL(pwm_enable);
-
-void pwm_disable(struct pwm_device *pwm)
-{
-	if (pwm->clk_enabled) {
-		clk_disable(pwm->clk);
-		pwm->clk_enabled = 0;
-	}
-}
-EXPORT_SYMBOL(pwm_disable);
-
-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, node) {
-		if (pwm->pwm_id == pwm_id) {
-			found = 1;
-			break;
-		}
-	}
-
-	if (found) {
-		if (pwm->use_count == 0) {
-			pwm->use_count++;
-			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
-		pr_warning("PWM device already freed\n");
-
-	mutex_unlock(&pwm_lock);
-}
-EXPORT_SYMBOL(pwm_free);
-
-static inline void __add_pwm(struct pwm_device *pwm)
-{
-	mutex_lock(&pwm_lock);
-	list_add_tail(&pwm->node, &pwm_list);
-	mutex_unlock(&pwm_lock);
-}
-
-static struct pwm_device *pwm_probe(struct platform_device *pdev,
-		unsigned int pwm_id, struct pwm_device *parent_pwm)
-{
-	struct pwm_device *pwm;
-	struct resource *r;
-	int ret = 0;
-
-	pwm = kzalloc(sizeof(struct pwm_device), GFP_KERNEL);
-	if (pwm == NULL) {
-		dev_err(&pdev->dev, "failed to allocate memory\n");
-		return ERR_PTR(-ENOMEM);
-	}
-
-	pwm->clk = clk_get(NULL, "OST_CLK");
-	if (IS_ERR(pwm->clk)) {
-		ret = PTR_ERR(pwm->clk);
-		goto err_free;
-	}
-	pwm->clk_enabled = 0;
-
-	pwm->use_count = 0;
-	pwm->pwm_id = pwm_id;
-	pwm->pdev = pdev;
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		ret = -ENODEV;
-		goto err_free_clk;
-	}
-
-	r = request_mem_region(r->start, resource_size(r), pdev->name);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "failed to request memory resource\n");
-		ret = -EBUSY;
-		goto err_free_clk;
-	}
-
-	__add_pwm(pwm);
-	platform_set_drvdata(pdev, pwm);
-	return pwm;
-
-err_free_clk:
-	clk_put(pwm->clk);
-err_free:
-	kfree(pwm);
-	return ERR_PTR(ret);
-}
-
-static int __devinit puv3_pwm_probe(struct platform_device *pdev)
-{
-	struct pwm_device *pwm = pwm_probe(pdev, pdev->id, NULL);
-
-	if (IS_ERR(pwm))
-		return PTR_ERR(pwm);
-
-	return 0;
-}
-
-static int __devexit pwm_remove(struct platform_device *pdev)
-{
-	struct pwm_device *pwm;
-	struct resource *r;
-
-	pwm = platform_get_drvdata(pdev);
-	if (pwm == NULL)
-		return -ENODEV;
-
-	mutex_lock(&pwm_lock);
-	list_del(&pwm->node);
-	mutex_unlock(&pwm_lock);
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(r->start, resource_size(r));
-
-	clk_put(pwm->clk);
-	kfree(pwm);
-	return 0;
-}
-
-static struct platform_driver puv3_pwm_driver = {
-	.driver		= {
-		.name	= "PKUnity-v3-PWM",
-	},
-	.probe		= puv3_pwm_probe,
-	.remove		= __devexit_p(pwm_remove),
-};
-
-static int __init pwm_init(void)
-{
-	int ret = 0;
-
-	ret = platform_driver_register(&puv3_pwm_driver);
-	if (ret) {
-		printk(KERN_ERR "failed to register puv3_pwm_driver\n");
-		return ret;
-	}
-
-	return ret;
-}
-arch_initcall(pwm_init);
-
-static void __exit pwm_exit(void)
-{
-	platform_driver_unregister(&puv3_pwm_driver);
-}
-module_exit(pwm_exit);
-
-MODULE_LICENSE("GPL v2");