Merge branches 'pxa-misc', 'pxa-pwm' and 'pxa-multi' into pxa

arch/arm/Kconfig

@@ -22,6 +22,9 @@ config ARM
 	  Europe.  There is an ARM Linux project with a web page at
 	  <http://www.arm.linux.org.uk/>.
 
+config HAVE_PWM
+	bool
+
 config SYS_SUPPORTS_APM_EMULATION
 	bool
 

arch/arm/common/sharpsl_pm.c

@@ -31,6 +31,7 @@
 #include <asm/irq.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/sharpsl.h>
 #include <asm/hardware/sharpsl_pm.h>
 
@@ -157,6 +158,7 @@ static void sharpsl_battery_thread(struct work_struct *private_)
 	dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 			sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 
+#ifdef CONFIG_BACKLIGHT_CORGI
 	/* If battery is low. limit backlight intensity to save power. */
 	if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 			&& ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
@@ -169,6 +171,7 @@ static void sharpsl_battery_thread(struct work_struct *private_)
 		sharpsl_pm.machinfo->backlight_limit(0);
 		sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 	}
+#endif
 
 	/* Suspend if critical battery level */
 	if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)

arch/arm/mach-pxa/Kconfig

@@ -20,8 +20,7 @@ endmenu
 
 endif
 
-choice
-	prompt "Select target board"
+menu "Select target boards"
 
 config ARCH_GUMSTIX
 	bool "Gumstix XScale boards"
@@ -37,10 +36,12 @@ config ARCH_LUBBOCK
 config MACH_LOGICPD_PXA270
 	bool "LogicPD PXA270 Card Engine Development Platform"
 	select PXA27x
+	select HAVE_PWM
 
 config MACH_MAINSTONE
 	bool "Intel HCDDBBVA0 Development Platform"
 	select PXA27x
+	select HAVE_PWM
 
 config ARCH_PXA_IDP
 	bool "Accelent Xscale IDP"
@@ -116,6 +117,7 @@ config MACH_COLIBRI
 config MACH_ZYLONITE
 	bool "PXA3xx Development Platform"
 	select PXA3xx
+	select HAVE_PWM
 
 config MACH_LITTLETON
 	bool "PXA3xx Form Factor Platform (aka Littleton)"
@@ -138,7 +140,7 @@ config MACH_PCM027
 	select PXA27x
 	select IWMMXT
 
-endchoice
+endmenu
 
 choice
 	prompt "Used baseboard"
@@ -146,25 +148,24 @@ choice
 
 config MACH_PCM990_BASEBOARD
 	bool "PHYTEC PCM-990 development board"
+	select HAVE_PWM
 
 endchoice
 
-if PXA_SHARPSL
-
 choice
-	prompt "Select target Sharp Zaurus device range"
+	prompt "display on pcm990"
+	depends on MACH_PCM990_BASEBOARD
 
-config PXA_SHARPSL_25x
-	bool "Sharp PXA25x models (SL-5600, SL-C7xx and SL-C6000x)"
-	select PXA25x
+config PCM990_DISPLAY_SHARP
+	bool "sharp lq084v1dg21 stn display"
 
-config PXA_SHARPSL_27x
-	bool "Sharp PXA270 models (SL-Cxx00)"
-	select PXA27x
+config PCM990_DISPLAY_NEC
+	bool "nec nl6448bc20_18d tft display"
 
-endchoice
+config PCM990_DISPLAY_NONE
+	bool "no display"
 
-endif
+endchoice
 
 if ARCH_GUMSTIX
 
@@ -199,28 +200,33 @@ endmenu
 
 config MACH_POODLE
 	bool "Enable Sharp SL-5600 (Poodle) Support"
-	depends on PXA_SHARPSL_25x
+	depends on PXA_SHARPSL
+	select PXA25x
 	select SHARP_LOCOMO
 	select PXA_SSP
 
 config MACH_CORGI
 	bool "Enable Sharp SL-C700 (Corgi) Support"
-	depends on PXA_SHARPSL_25x
+	depends on PXA_SHARPSL
+	select PXA25x
 	select PXA_SHARP_C7xx
 
 config MACH_SHEPHERD
 	bool "Enable Sharp SL-C750 (Shepherd) Support"
-	depends on PXA_SHARPSL_25x
+	depends on PXA_SHARPSL
+	select PXA25x
 	select PXA_SHARP_C7xx
 
 config MACH_HUSKY
 	bool "Enable Sharp SL-C760 (Husky) Support"
-	depends on PXA_SHARPSL_25x
+	depends on PXA_SHARPSL
+	select PXA25x
 	select PXA_SHARP_C7xx
 
 config MACH_AKITA
 	bool "Enable Sharp SL-1000 (Akita) Support"
-	depends on PXA_SHARPSL_27x
+	depends on PXA_SHARPSL
+	select PXA27x
 	select PXA_SHARP_Cxx00
 	select MACH_SPITZ
 	select I2C
@@ -228,17 +234,20 @@ config MACH_AKITA
 
 config MACH_SPITZ
 	bool "Enable Sharp Zaurus SL-3000 (Spitz) Support"
-	depends on PXA_SHARPSL_27x
+	depends on PXA_SHARPSL
+	select PXA27x
 	select PXA_SHARP_Cxx00
 
 config MACH_BORZOI
 	bool "Enable Sharp Zaurus SL-3100 (Borzoi) Support"
-	depends on PXA_SHARPSL_27x
+	depends on PXA_SHARPSL
+	select PXA27x
 	select PXA_SHARP_Cxx00
 
 config MACH_TOSA
 	bool "Enable Sharp SL-6000x (Tosa) Support"
-	depends on PXA_SHARPSL_25x
+	depends on PXA_SHARPSL
+	select PXA25x
 
 config PXA25x
 	bool
@@ -273,4 +282,10 @@ config PXA_SSP
 	tristate
 	help
 	  Enable support for PXA2xx SSP ports
+
+config PXA_PWM
+	tristate
+	default BACKLIGHT_PWM
+	help
+	  Enable support for PXA2xx/PXA3xx PWM controllers
 endif

arch/arm/mach-pxa/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_CPU_FREQ)		+= cpu-pxa.o
 
 # Generic drivers that other drivers may depend upon
 obj-$(CONFIG_PXA_SSP)		+= ssp.o
+obj-$(CONFIG_PXA_PWM)		+= pwm.o
 
 # SoC-specific code
 obj-$(CONFIG_PXA25x)		+= mfp-pxa2xx.o pxa25x.o

arch/arm/mach-pxa/clock.c

@@ -12,7 +12,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 
-#include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include <asm/hardware.h>
 

arch/arm/mach-pxa/cm-x270-pci.c

@@ -41,18 +41,20 @@ void __init cmx270_pci_adjust_zones(int node, unsigned long *zone_size,
 {
 	unsigned int sz = SZ_64M >> PAGE_SHIFT;
 
-	pr_info("Adjusting zones for CM-x270\n");
-
-	/*
-	 * Only adjust if > 64M on current system
-	 */
-	if (node || (zone_size[0] <= sz))
-		return;
-
-	zone_size[1] = zone_size[0] - sz;
-	zone_size[0] = sz;
-	zhole_size[1] = zhole_size[0];
-	zhole_size[0] = 0;
+	if (machine_is_armcore()) {
+		pr_info("Adjusting zones for CM-x270\n");
+
+		/*
+		 * Only adjust if > 64M on current system
+		 */
+		if (node || (zone_size[0] <= sz))
+			return;
+
+		zone_size[1] = zone_size[0] - sz;
+		zone_size[0] = sz;
+		zhole_size[1] = zhole_size[0];
+		zhole_size[0] = 0;
+	}
 }
 
 static void cmx270_it8152_irq_demux(unsigned int irq, struct irq_desc *desc)

arch/arm/mach-pxa/corgi.c

@@ -36,6 +36,7 @@
 #include <asm/mach/irq.h>
 
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include <asm/arch/irda.h>
 #include <asm/arch/mmc.h>

arch/arm/mach-pxa/corgi_pm.c

@@ -26,6 +26,7 @@
 #include <asm/arch/sharpsl.h>
 #include <asm/arch/corgi.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include "sharpsl.h"
 
@@ -204,7 +205,9 @@ static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 	.read_devdata    = corgipm_read_devdata,
 	.charger_wakeup  = corgi_charger_wakeup,
 	.should_wakeup   = corgi_should_wakeup,
+#ifdef CONFIG_BACKLIGHT_CORGI
 	.backlight_limit = corgibl_limit_intensity,
+#endif
 	.charge_on_volt	  = SHARPSL_CHARGE_ON_VOLT,
 	.charge_on_temp	  = SHARPSL_CHARGE_ON_TEMP,
 	.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
@@ -226,6 +229,10 @@ static int __devinit corgipm_init(void)
 {
 	int ret;
 
+	if (!machine_is_corgi() && !machine_is_shepherd()
+			&& !machine_is_husky())
+		return -ENODEV;
+
 	corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 	if (!corgipm_device)
 		return -ENOMEM;

arch/arm/mach-pxa/devices.c

@@ -10,11 +10,13 @@
 #include <asm/arch/mmc.h>
 #include <asm/arch/irda.h>
 #include <asm/arch/i2c.h>
+#include <asm/arch/mfp-pxa27x.h>
 #include <asm/arch/ohci.h>
 #include <asm/arch/pxa27x_keypad.h>
 #include <asm/arch/camera.h>
 
 #include "devices.h"
+#include "generic.h"
 
 void __init pxa_register_device(struct platform_device *dev, void *data)
 {
@@ -233,8 +235,15 @@ struct platform_device pxa_device_i2c = {
 	.num_resources	= ARRAY_SIZE(pxai2c_resources),
 };
 
+static unsigned long pxa27x_i2c_mfp_cfg[] = {
+	GPIO117_I2C_SCL,
+	GPIO118_I2C_SDA,
+};
+
 void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
 {
+	if (cpu_is_pxa27x())
+		pxa2xx_mfp_config(ARRAY_AND_SIZE(pxa27x_i2c_mfp_cfg));
 	pxa_register_device(&pxa_device_i2c, info);
 }
 
@@ -280,6 +289,36 @@ struct platform_device pxa_device_rtc = {
 
 #ifdef CONFIG_PXA25x
 
+static struct resource pxa25x_resource_pwm0[] = {
+	[0] = {
+		.start	= 0x40b00000,
+		.end	= 0x40b0000f,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+struct platform_device pxa25x_device_pwm0 = {
+	.name		= "pxa25x-pwm",
+	.id		= 0,
+	.resource	= pxa25x_resource_pwm0,
+	.num_resources	= ARRAY_SIZE(pxa25x_resource_pwm0),
+};
+
+static struct resource pxa25x_resource_pwm1[] = {
+	[0] = {
+		.start	= 0x40c00000,
+		.end	= 0x40c0000f,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+struct platform_device pxa25x_device_pwm1 = {
+	.name		= "pxa25x-pwm",
+	.id		= 1,
+	.resource	= pxa25x_resource_pwm1,
+	.num_resources	= ARRAY_SIZE(pxa25x_resource_pwm1),
+};
+
 static u64 pxa25x_ssp_dma_mask = DMA_BIT_MASK(32);
 
 static struct resource pxa25x_resource_ssp[] = {
@@ -568,6 +607,36 @@ struct platform_device pxa27x_device_ssp3 = {
 	.num_resources	= ARRAY_SIZE(pxa27x_resource_ssp3),
 };
 
+static struct resource pxa27x_resource_pwm0[] = {
+	[0] = {
+		.start	= 0x40b00000,
+		.end	= 0x40b0001f,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+struct platform_device pxa27x_device_pwm0 = {
+	.name		= "pxa27x-pwm",
+	.id		= 0,
+	.resource	= pxa27x_resource_pwm0,
+	.num_resources	= ARRAY_SIZE(pxa27x_resource_pwm0),
+};
+
+static struct resource pxa27x_resource_pwm1[] = {
+	[0] = {
+		.start	= 0x40c00000,
+		.end	= 0x40c0001f,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+struct platform_device pxa27x_device_pwm1 = {
+	.name		= "pxa27x-pwm",
+	.id		= 1,
+	.resource	= pxa27x_resource_pwm1,
+	.num_resources	= ARRAY_SIZE(pxa27x_resource_pwm1),
+};
+
 static struct resource pxa27x_resource_camera[] = {
 	[0] = {
 		.start	= 0x50000000,

arch/arm/mach-pxa/devices.h

@@ -24,4 +24,9 @@ extern struct platform_device pxa27x_device_ssp2;
 extern struct platform_device pxa27x_device_ssp3;
 extern struct platform_device pxa3xx_device_ssp4;
 
+extern struct platform_device pxa25x_device_pwm0;
+extern struct platform_device pxa25x_device_pwm1;
+extern struct platform_device pxa27x_device_pwm0;
+extern struct platform_device pxa27x_device_pwm1;
+
 void __init pxa_register_device(struct platform_device *dev, void *data);

arch/arm/mach-pxa/em-x270.c

@@ -24,6 +24,7 @@
 
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
+#include <asm/arch/pxa27x-udc.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/ohci.h>
 #include <asm/arch/mmc.h>

arch/arm/mach-pxa/generic.c

@@ -26,6 +26,7 @@
 #include <asm/mach/map.h>
 
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h> /* for __pxa_set_cken */
 
 #include "generic.h"
 

arch/arm/mach-pxa/lpd270.c

@@ -23,6 +23,7 @@
 #include <linux/ioport.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -134,9 +135,12 @@ static struct sys_device lpd270_irq_device = {
 
 static int __init lpd270_irq_device_init(void)
 {
-	int ret = sysdev_class_register(&lpd270_irq_sysclass);
-	if (ret == 0)
-		ret = sysdev_register(&lpd270_irq_device);
+	int ret = -ENODEV;
+	if (machine_is_logicpd_pxa270()) {
+		ret = sysdev_class_register(&lpd270_irq_sysclass);
+		if (ret == 0)
+			ret = sysdev_register(&lpd270_irq_device);
+	}
 	return ret;
 }
 
@@ -233,21 +237,20 @@ static struct platform_device lpd270_flash_device[2] = {
 	},
 };
 
-static void lpd270_backlight_power(int on)
-{
-	if (on) {
-		pxa_gpio_mode(GPIO16_PWM0_MD);
-		pxa_set_cken(CKEN_PWM0, 1);
-		PWM_CTRL0 = 0;
-		PWM_PWDUTY0 = 0x3ff;
-		PWM_PERVAL0 = 0x3ff;
-	} else {
-		PWM_CTRL0 = 0;
-		PWM_PWDUTY0 = 0x0;
-		PWM_PERVAL0 = 0x3FF;
-		pxa_set_cken(CKEN_PWM0, 0);
-	}
-}
+static struct platform_pwm_backlight_data lpd270_backlight_data = {
+	.pwm_id		= 0,
+	.max_brightness	= 1,
+	.dft_brightness	= 1,
+	.pwm_period_ns	= 78770,
+};
+
+static struct platform_device lpd270_backlight_device = {
+	.name		= "pwm-backlight",
+	.dev		= {
+		.parent	= &pxa27x_device_pwm0.dev,
+		.platform_data = &lpd270_backlight_data,
+	},
+};
 
 /* 5.7" TFT QVGA (LoLo display number 1) */
 static struct pxafb_mode_info sharp_lq057q3dc02_mode = {
@@ -269,7 +272,6 @@ static struct pxafb_mach_info sharp_lq057q3dc02 = {
 	.num_modes		= 1,
 	.lccr0			= 0x07800080,
 	.lccr3			= 0x00400000,
-	.pxafb_backlight_power	= lpd270_backlight_power,
 };
 
 /* 12.1" TFT SVGA (LoLo display number 2) */
@@ -292,7 +294,6 @@ static struct pxafb_mach_info sharp_lq121s1dg31 = {
 	.num_modes		= 1,
 	.lccr0			= 0x07800080,
 	.lccr3			= 0x00400000,
-	.pxafb_backlight_power	= lpd270_backlight_power,
 };
 
 /* 3.6" TFT QVGA (LoLo display number 3) */
@@ -315,7 +316,6 @@ static struct pxafb_mach_info sharp_lq036q1da01 = {
 	.num_modes		= 1,
 	.lccr0			= 0x07800080,
 	.lccr3			= 0x00400000,
-	.pxafb_backlight_power	= lpd270_backlight_power,
 };
 
 /* 6.4" TFT VGA (LoLo display number 5) */
@@ -338,7 +338,6 @@ static struct pxafb_mach_info sharp_lq64d343 = {
 	.num_modes		= 1,
 	.lccr0			= 0x07800080,
 	.lccr3			= 0x00400000,
-	.pxafb_backlight_power	= lpd270_backlight_power,
 };
 
 /* 10.4" TFT VGA (LoLo display number 7) */
@@ -361,7 +360,6 @@ static struct pxafb_mach_info sharp_lq10d368 = {
 	.num_modes		= 1,
 	.lccr0			= 0x07800080,
 	.lccr3			= 0x00400000,
-	.pxafb_backlight_power	= lpd270_backlight_power,
 };
 
 /* 3.5" TFT QVGA (LoLo display number 8) */
@@ -384,7 +382,6 @@ static struct pxafb_mach_info sharp_lq035q7db02_20 = {
 	.num_modes		= 1,
 	.lccr0			= 0x07800080,
 	.lccr3			= 0x00400000,
-	.pxafb_backlight_power	= lpd270_backlight_power,
 };
 
 static struct pxafb_mach_info *lpd270_lcd_to_use;
@@ -414,6 +411,7 @@ __setup("lcd=", lpd270_set_lcd);
 
 static struct platform_device *platform_devices[] __initdata = {
 	&smc91x_device,
+	&lpd270_backlight_device,
 	&lpd270_audio_device,
 	&lpd270_flash_device[0],
 	&lpd270_flash_device[1],
@@ -454,6 +452,7 @@ static void __init lpd270_init(void)
 	 * On LogicPD PXA270, we route AC97_SYSCLK via GPIO45.
 	 */
 	pxa_gpio_mode(GPIO45_SYSCLK_AC97_MD);
+	pxa_gpio_mode(GPIO16_PWM0_MD);
 
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 

arch/arm/mach-pxa/magician.c

@@ -25,6 +25,7 @@
 #include <linux/mtd/map.h>
 #include <linux/mtd/physmap.h>
 #include <linux/pda_power.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/gpio.h>
 #include <asm/hardware.h>
@@ -33,12 +34,14 @@
 #include <asm/arch/magician.h>
 #include <asm/arch/mfp-pxa27x.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/i2c.h>
 #include <asm/arch/mmc.h>
 #include <asm/arch/irda.h>
 #include <asm/arch/ohci.h>
 
+#include "devices.h"
 #include "generic.h"
 
 static unsigned long magician_pin_config[] = {
@@ -348,40 +351,58 @@ static struct pxafb_mach_info samsung_info = {
  * Backlight
  */
 
-static void magician_set_bl_intensity(int intensity)
+static int magician_backlight_init(struct device *dev)
 {
-	if (intensity) {
-		PWM_CTRL0 = 1;
-		PWM_PERVAL0 = 0xc8;
-		if (intensity > 0xc7) {
-			PWM_PWDUTY0 = intensity - 0x48;
-			gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 1);
-		} else {
-			PWM_PWDUTY0 = intensity;
-			gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 0);
-		}
-		gpio_set_value(EGPIO_MAGICIAN_BL_POWER, 1);
-		pxa_set_cken(CKEN_PWM0, 1);
+	int ret;
+
+	ret = gpio_request(EGPIO_MAGICIAN_BL_POWER, "BL_POWER");
+	if (ret)
+		goto err;
+	ret = gpio_request(EGPIO_MAGICIAN_BL_POWER2, "BL_POWER2");
+	if (ret)
+		goto err2;
+	return 0;
+
+err2:
+	gpio_free(EGPIO_MAGICIAN_BL_POWER);
+err:
+	return ret;
+}
+
+static int magician_backlight_notify(int brightness)
+{
+	gpio_set_value(EGPIO_MAGICIAN_BL_POWER, brightness);
+	if (brightness >= 200) {
+		gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 1);
+		return brightness - 72;
 	} else {
-		/* PWM_PWDUTY0 = intensity; */
-		gpio_set_value(EGPIO_MAGICIAN_BL_POWER, 0);
-		pxa_set_cken(CKEN_PWM0, 0);
+		gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 0);
+		return brightness;
 	}
 }
 
-static struct generic_bl_info backlight_info = {
-	.default_intensity = 0x64,
-	.limit_mask        = 0x0b,
-	.max_intensity     = 0xc7+0x48,
-	.set_bl_intensity  = magician_set_bl_intensity,
+static void magician_backlight_exit(struct device *dev)
+{
+	gpio_free(EGPIO_MAGICIAN_BL_POWER);
+	gpio_free(EGPIO_MAGICIAN_BL_POWER2);
+}
+
+static struct platform_pwm_backlight_data backlight_data = {
+	.pwm_id         = 0,
+	.max_brightness = 272,
+	.dft_brightness = 100,
+	.pwm_period_ns  = 30923,
+	.init           = magician_backlight_init,
+	.notify         = magician_backlight_notify,
+	.exit           = magician_backlight_exit,
 };
 
 static struct platform_device backlight = {
-	.name = "generic-bl",
+	.name = "pwm-backlight",
 	.dev  = {
-		.platform_data = &backlight_info,
+		.parent        = &pxa27x_device_pwm0.dev,
+		.platform_data = &backlight_data,
 	},
-	.id   = -1,
 };
 
 /*

arch/arm/mach-pxa/mainstone.c

@@ -23,9 +23,9 @@
 #include <linux/ioport.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
-#include <linux/backlight.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -349,56 +349,27 @@ static struct platform_device mst_flash_device[2] = {
 	},
 };
 
-#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
-static int mainstone_backlight_update_status(struct backlight_device *bl)
-{
-	int brightness = bl->props.brightness;
-
-	if (bl->props.power != FB_BLANK_UNBLANK ||
-	    bl->props.fb_blank != FB_BLANK_UNBLANK)
-		brightness = 0;
-
-	if (brightness != 0)
-		pxa_set_cken(CKEN_PWM0, 1);
-
-	PWM_CTRL0 = 0;
-	PWM_PWDUTY0 = brightness;
-	PWM_PERVAL0 = bl->props.max_brightness;
-
-	if (brightness == 0)
-		pxa_set_cken(CKEN_PWM0, 0);
-	return 0; /* pointless return value */
-}
-
-static int mainstone_backlight_get_brightness(struct backlight_device *bl)
-{
-	return PWM_PWDUTY0;
-}
+#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
+static struct platform_pwm_backlight_data mainstone_backlight_data = {
+	.pwm_id		= 0,
+	.max_brightness	= 1023,
+	.dft_brightness	= 1023,
+	.pwm_period_ns	= 78770,
+};
 
-static /*const*/ struct backlight_ops mainstone_backlight_ops = {
-	.update_status	= mainstone_backlight_update_status,
-	.get_brightness	= mainstone_backlight_get_brightness,
+static struct platform_device mainstone_backlight_device = {
+	.name		= "pwm-backlight",
+	.dev		= {
+		.parent = &pxa27x_device_pwm0.dev,
+		.platform_data = &mainstone_backlight_data,
+	},
 };
 
 static void __init mainstone_backlight_register(void)
 {
-	struct backlight_device *bl;
-
-	bl = backlight_device_register("mainstone-bl", &pxa_device_fb.dev,
-				       NULL, &mainstone_backlight_ops);
-	if (IS_ERR(bl)) {
-		printk(KERN_ERR "mainstone: unable to register backlight: %ld\n",
-		       PTR_ERR(bl));
-		return;
-	}
-
-	/*
-	 * broken design - register-then-setup interfaces are
-	 * utterly broken by definition.
-	 */
-	bl->props.max_brightness = 1023;
-	bl->props.brightness = 1023;
-	backlight_update_status(bl);
+	int ret = platform_device_register(&mainstone_backlight_device);
+	if (ret)
+		printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);
 }
 #else
 #define mainstone_backlight_register()	do { } while (0)

arch/arm/mach-pxa/mfp-pxa2xx.c

@@ -20,6 +20,7 @@
 
 #include <asm/arch/hardware.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/mfp-pxa2xx.h>
 
 #include "generic.h"

arch/arm/mach-pxa/pcm990-baseboard.c

@@ -24,6 +24,7 @@
 #include <linux/platform_device.h>
 #include <linux/ide.h>
 #include <linux/i2c.h>
+#include <linux/pwm_backlight.h>
 
 #include <media/soc_camera.h>
 
@@ -36,9 +37,99 @@
 #include <asm/arch/mmc.h>
 #include <asm/arch/ohci.h>
 #include <asm/arch/pcm990_baseboard.h>
+#include <asm/arch/pxafb.h>
+
+#include "devices.h"
+
+/*
+ * pcm990_lcd_power - control power supply to the LCD
+ * @on: 0 = switch off, 1 = switch on
+ *
+ * Called by the pxafb driver
+ */
+#ifndef CONFIG_PCM990_DISPLAY_NONE
+static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
+{
+	if (on) {
+		/* enable LCD-Latches
+		 * power on LCD
+		 */
+		__PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) =
+			PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON;
+	} else {
+		/* disable LCD-Latches
+		 * power off LCD
+		 */
+		__PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) = 0x00;
+	}
+}
+#endif
+
+#if defined(CONFIG_PCM990_DISPLAY_SHARP)
+static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
+	.pixclock		= 28000,
+	.xres			= 640,
+	.yres			= 480,
+	.bpp			= 16,
+	.hsync_len		= 20,
+	.left_margin		= 103,
+	.right_margin		= 47,
+	.vsync_len		= 6,
+	.upper_margin		= 28,
+	.lower_margin		= 5,
+	.sync			= 0,
+	.cmap_greyscale		= 0,
+};
+
+static struct pxafb_mach_info pcm990_fbinfo __initdata = {
+	.modes			= &fb_info_sharp_lq084v1dg21,
+	.num_modes		= 1,
+	.lccr0			= LCCR0_PAS,
+	.lccr3			= LCCR3_PCP,
+	.pxafb_lcd_power	= pcm990_lcd_power,
+};
+#elif defined(CONFIG_PCM990_DISPLAY_NEC)
+struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
+	.pixclock		= 39720,
+	.xres			= 640,
+	.yres			= 480,
+	.bpp			= 16,
+	.hsync_len		= 32,
+	.left_margin		= 16,
+	.right_margin		= 48,
+	.vsync_len		= 2,
+	.upper_margin		= 12,
+	.lower_margin		= 17,
+	.sync			= 0,
+	.cmap_greyscale		= 0,
+};
+
+static struct pxafb_mach_info pcm990_fbinfo __initdata = {
+	.modes			= &fb_info_nec_nl6448bc20_18d,
+	.num_modes		= 1,
+	.lccr0			= LCCR0_Act,
+	.lccr3			= LCCR3_PixFlEdg,
+	.pxafb_lcd_power	= pcm990_lcd_power,
+};
+#endif
+
+static struct platform_pwm_backlight_data pcm990_backlight_data = {
+	.pwm_id		= 0,
+	.max_brightness	= 1023,
+	.dft_brightness	= 1023,
+	.pwm_period_ns	= 78770,
+};
+
+static struct platform_device pcm990_backlight_device = {
+	.name		= "pwm-backlight",
+	.dev		= {
+		.parent = &pxa27x_device_pwm0.dev,
+		.platform_data = &pcm990_backlight_data,
+	},
+};
 
 /*
- * The PCM-990 development baseboard uses PCM-027's hardeware in the
+ * The PCM-990 development baseboard uses PCM-027's hardware in the
  * following way:
  *
  * - LCD support is in use
@@ -393,6 +484,12 @@ void __init pcm990_baseboard_init(void)
 	/* register CPLD's IRQ controller */
 	pcm990_init_irq();
 
+#ifndef CONFIG_PCM990_DISPLAY_NONE
+	set_pxa_fb_info(&pcm990_fbinfo);
+#endif
+	pxa_gpio_mode(GPIO16_PWM0_MD);
+	platform_device_register(&pcm990_backlight_device);
+
 	platform_device_register(&pxa27x_device_ac97);
 
 	/* MMC */

arch/arm/mach-pxa/poodle.c

@@ -32,6 +32,7 @@
 #include <asm/mach/irq.h>
 
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include <asm/arch/mmc.h>
 #include <asm/arch/udc.h>

arch/arm/mach-pxa/pwm.c

+/*
+ * linux/arch/arm/mach-pxa/pwm.c
+ *
+ * simple driver for PWM (Pulse Width Modulator) controller
+ *
+ * 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.
+ *
+ * 2008-02-13	initial version
+ * 		eric miao <eric.miao@marvell.com>
+ */
+
+#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/div64.h>
+#include <asm/arch/pxa-regs.h>
+
+/* PWM registers and bits definitions */
+#define PWMCR		(0x00)
+#define PWMDCR		(0x04)
+#define PWMPCR		(0x08)
+
+#define PWMCR_SD	(1 << 6)
+#define PWMDCR_FD	(1 << 10)
+
+struct pwm_device {
+	struct list_head	node;
+	struct platform_device *pdev;
+
+	const char	*label;
+	struct clk	*clk;
+	int		clk_enabled;
+	void __iomem	*mmio_base;
+
+	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 < 0)
+		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 = PWMDCR_FD;
+	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);
+	__raw_writel(prescale, pwm->mmio_base + PWMCR);
+	__raw_writel(dc, pwm->mmio_base + PWMDCR);
+	__raw_writel(pv, pwm->mmio_base + PWMPCR);
+	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(&pdev->dev, "PWMCLK");
+	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;
+
+	if (parent_pwm != NULL) {
+		/* registers for the second PWM has offset of 0x10 */
+		pwm->mmio_base = parent_pwm->mmio_base + 0x10;
+		__add_pwm(pwm);
+		return pwm;
+	}
+
+	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, r->end - r->start + 1, pdev->name);
+	if (r == NULL) {
+		dev_err(&pdev->dev, "failed to request memory resource\n");
+		ret = -EBUSY;
+		goto err_free_clk;
+	}
+
+	pwm->mmio_base = ioremap(r->start, r->end - r->start + 1);
+	if (pwm->mmio_base == NULL) {
+		dev_err(&pdev->dev, "failed to ioremap() registers\n");
+		ret = -ENODEV;
+		goto err_free_mem;
+	}
+
+	__add_pwm(pwm);
+	platform_set_drvdata(pdev, pwm);
+	return pwm;
+
+err_free_mem:
+	release_mem_region(r->start, r->end - r->start + 1);
+err_free_clk:
+	clk_put(pwm->clk);
+err_free:
+	kfree(pwm);
+	return ERR_PTR(ret);
+}
+
+static int __devinit pxa25x_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 __devinit pxa27x_pwm_probe(struct platform_device *pdev)
+{
+	struct pwm_device *pwm;
+
+	pwm = pwm_probe(pdev, pdev->id, NULL);
+	if (IS_ERR(pwm))
+		return PTR_ERR(pwm);
+
+	pwm = pwm_probe(pdev, pdev->id + 2, pwm);
+	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);
+
+	iounmap(pwm->mmio_base);
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	release_mem_region(r->start, r->end - r->start + 1);
+
+	clk_put(pwm->clk);
+	kfree(pwm);
+	return 0;
+}
+
+static struct platform_driver pxa25x_pwm_driver = {
+	.driver		= {
+		.name	= "pxa25x-pwm",
+	},
+	.probe		= pxa25x_pwm_probe,
+	.remove		= __devexit_p(pwm_remove),
+};
+
+static struct platform_driver pxa27x_pwm_driver = {
+	.driver		= {
+		.name	= "pxa27x-pwm",
+	},
+	.probe		= pxa27x_pwm_probe,
+	.remove		= __devexit_p(pwm_remove),
+};
+
+static int __init pwm_init(void)
+{
+	int ret = 0;
+
+	ret = platform_driver_register(&pxa25x_pwm_driver);
+	if (ret) {
+		printk(KERN_ERR "failed to register pxa25x_pwm_driver\n");
+		return ret;
+	}
+
+	ret = platform_driver_register(&pxa27x_pwm_driver);
+	if (ret) {
+		printk(KERN_ERR "failed to register pxa27x_pwm_driver\n");
+		return ret;
+	}
+
+	return ret;
+}
+arch_initcall(pwm_init);
+
+static void __exit pwm_exit(void)
+{
+	platform_driver_unregister(&pxa25x_pwm_driver);
+	platform_driver_unregister(&pxa27x_pwm_driver);
+}
+module_exit(pwm_exit);
+
+MODULE_LICENSE("GPL v2");

arch/arm/mach-pxa/pxa25x.c

@@ -26,6 +26,7 @@
 #include <asm/hardware.h>
 #include <asm/arch/irqs.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/mfp-pxa25x.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/dma.h>
@@ -133,12 +134,12 @@ static struct clk pxa25x_clks[] = {
 	INIT_CKEN("SSPCLK",  SSP, 3686400, 0, &pxa25x_device_ssp.dev),
 	INIT_CKEN("SSPCLK", NSSP, 3686400, 0, &pxa25x_device_nssp.dev),
 	INIT_CKEN("SSPCLK", ASSP, 3686400, 0, &pxa25x_device_assp.dev),
+	INIT_CKEN("PWMCLK", PWM0, 3686400, 0, &pxa25x_device_pwm0.dev),
+	INIT_CKEN("PWMCLK", PWM1, 3686400, 0, &pxa25x_device_pwm1.dev),
 
 	INIT_CKEN("AC97CLK",     AC97,     24576000, 0, NULL),
 
 	/*
-	INIT_CKEN("PWMCLK",  PWM0, 3686400,  0, NULL),
-	INIT_CKEN("PWMCLK",  PWM0, 3686400,  0, NULL),
 	INIT_CKEN("I2SCLK",  I2S,  14745600, 0, NULL),
 	*/
 	INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL),
@@ -275,6 +276,8 @@ static struct platform_device *pxa25x_devices[] __initdata = {
 	&pxa25x_device_ssp,
 	&pxa25x_device_nssp,
 	&pxa25x_device_assp,
+	&pxa25x_device_pwm0,
+	&pxa25x_device_pwm1,
 };
 
 static struct sys_device pxa25x_sysdev[] = {

arch/arm/mach-pxa/pxa27x.c

@@ -157,12 +157,13 @@ static struct clk pxa27x_clks[] = {
 	INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
 	INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
 	INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
+	INIT_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
+	INIT_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
 
 	INIT_CKEN("AC97CLK",     AC97,     24576000, 0, NULL),
 	INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
 
 	/*
-	INIT_CKEN("PWMCLK",  PWM0, 13000000, 0, NULL),
 	INIT_CKEN("MSLCLK",  MSL,  48000000, 0, NULL),
 	INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
 	INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
@@ -349,11 +350,14 @@ struct platform_device pxa27x_device_i2c_power = {
 
 void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info)
 {
+	local_irq_disable();
+	PCFR |= PCFR_PI2CEN;
+	local_irq_enable();
 	pxa27x_device_i2c_power.dev.platform_data = info;
 }
 
 static struct platform_device *devices[] __initdata = {
-	&pxa_device_udc,
+/*	&pxa_device_udc,	The UDC driver is PXA25x only */
 	&pxa_device_ffuart,
 	&pxa_device_btuart,
 	&pxa_device_stuart,
@@ -363,6 +367,8 @@ static struct platform_device *devices[] __initdata = {
 	&pxa27x_device_ssp1,
 	&pxa27x_device_ssp2,
 	&pxa27x_device_ssp3,
+	&pxa27x_device_pwm0,
+	&pxa27x_device_pwm1,
 };
 
 static struct sys_device pxa27x_sysdev[] = {

arch/arm/mach-pxa/pxa3xx.c

@@ -239,6 +239,8 @@ static struct clk pxa3xx_clks[] = {
 	PXA3xx_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
 	PXA3xx_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
 	PXA3xx_CKEN("SSPCLK", SSP4, 13000000, 0, &pxa3xx_device_ssp4.dev),
+	PXA3xx_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
+	PXA3xx_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
 
 	PXA3xx_CKEN("MMCCLK", MMC1, 19500000, 0, &pxa_device_mci.dev),
 	PXA3xx_CKEN("MMCCLK", MMC2, 19500000, 0, &pxa3xx_device_mci2.dev),
@@ -520,7 +522,7 @@ void __init pxa3xx_init_irq(void)
  */
 
 static struct platform_device *devices[] __initdata = {
-	&pxa_device_udc,
+/*	&pxa_device_udc,	The UDC driver is PXA25x only */
 	&pxa_device_ffuart,
 	&pxa_device_btuart,
 	&pxa_device_stuart,
@@ -530,6 +532,8 @@ static struct platform_device *devices[] __initdata = {
 	&pxa27x_device_ssp2,
 	&pxa27x_device_ssp3,
 	&pxa3xx_device_ssp4,
+	&pxa27x_device_pwm0,
+	&pxa27x_device_pwm1,
 };
 
 static struct sys_device pxa3xx_sysdev[] = {

arch/arm/mach-pxa/spitz_pm.c

@@ -26,6 +26,7 @@
 #include <asm/arch/sharpsl.h>
 #include <asm/arch/spitz.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include "sharpsl.h"
 
@@ -207,7 +208,9 @@ struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 	.read_devdata     = spitzpm_read_devdata,
 	.charger_wakeup   = spitz_charger_wakeup,
 	.should_wakeup    = spitz_should_wakeup,
+#ifdef CONFIG_BACKLIGHT_CORGI
         .backlight_limit  = corgibl_limit_intensity,
+#endif
 	.charge_on_volt	  = SHARPSL_CHARGE_ON_VOLT,
 	.charge_on_temp	  = SHARPSL_CHARGE_ON_TEMP,
 	.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
@@ -229,6 +232,10 @@ static int __devinit spitzpm_init(void)
 {
 	int ret;
 
+	if (!machine_is_spitz() && !machine_is_akita()
+			&& !machine_is_borzoi())
+		return -ENODEV;
+
 	spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 	if (!spitzpm_device)
 		return -ENOMEM;

arch/arm/mach-pxa/standby.S

@@ -14,6 +14,7 @@
 #include <asm/hardware.h>
 
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 
 		.text
 
@@ -35,20 +36,20 @@ ENTRY(pxa_cpu_standby)
 
 #ifdef CONFIG_PXA3xx
 
-#define MDCNFG		0x0000
-#define MDCNFG_DMCEN	(1 << 30)
-#define DDR_HCAL	0x0060
-#define DDR_HCAL_HCRNG	0x1f
-#define DDR_HCAL_HCPROG	(1 << 28)
-#define DDR_HCAL_HCEN	(1 << 31)
-#define DMCIER		0x0070
-#define DMCIER_EDLP	(1 << 29)
-#define DMCISR		0x0078
-#define RCOMP		0x0100
-#define RCOMP_SWEVAL	(1 << 31)
+#define PXA3_MDCNFG		0x0000
+#define PXA3_MDCNFG_DMCEN	(1 << 30)
+#define PXA3_DDR_HCAL		0x0060
+#define PXA3_DDR_HCAL_HCRNG	0x1f
+#define PXA3_DDR_HCAL_HCPROG	(1 << 28)
+#define PXA3_DDR_HCAL_HCEN	(1 << 31)
+#define PXA3_DMCIER		0x0070
+#define PXA3_DMCIER_EDLP	(1 << 29)
+#define PXA3_DMCISR		0x0078
+#define PXA3_RCOMP		0x0100
+#define PXA3_RCOMP_SWEVAL	(1 << 31)
 
 ENTRY(pm_enter_standby_start)
-	mov	r1, #0xf6000000		@ DMEMC_REG_BASE (MDCNFG)
+	mov	r1, #0xf6000000			@ DMEMC_REG_BASE (PXA3_MDCNFG)
 	add	r1, r1, #0x00100000
 
 	/*
@@ -59,54 +60,54 @@ ENTRY(pm_enter_standby_start)
 	 * This also means that only the dynamic memory controller
 	 * can be reliably accessed in the code following standby.
 	 */
-	ldr	r2, [r1]		@ Dummy read MDCNFG
+	ldr	r2, [r1]			@ Dummy read PXA3_MDCNFG
 
 	mcr	p14, 0, r0, c7, c0, 0
 	.rept	8
 	nop
 	.endr
 
-	ldr	r0, [r1, #DDR_HCAL]	@ Clear (and wait for) HCEN
-	bic	r0, r0, #DDR_HCAL_HCEN
-	str	r0, [r1, #DDR_HCAL]
-1:	ldr	r0, [r1, #DDR_HCAL]
-	tst	r0, #DDR_HCAL_HCEN
+	ldr	r0, [r1, #PXA3_DDR_HCAL]	@ Clear (and wait for) HCEN
+	bic	r0, r0, #PXA3_DDR_HCAL_HCEN
+	str	r0, [r1, #PXA3_DDR_HCAL]
+1:	ldr	r0, [r1, #PXA3_DDR_HCAL]
+	tst	r0, #PXA3_DDR_HCAL_HCEN
 	bne	1b
 
-	ldr	r0, [r1, #RCOMP]	@ Initiate RCOMP
-	orr	r0, r0, #RCOMP_SWEVAL
-	str	r0, [r1, #RCOMP]
+	ldr	r0, [r1, #PXA3_RCOMP]		@ Initiate RCOMP
+	orr	r0, r0, #PXA3_RCOMP_SWEVAL
+	str	r0, [r1, #PXA3_RCOMP]
 
-	mov	r0, #~0			@ Clear interrupts
-	str	r0, [r1, #DMCISR]
+	mov	r0, #~0				@ Clear interrupts
+	str	r0, [r1, #PXA3_DMCISR]
 
-	ldr	r0, [r1, #DMCIER]	@ set DMIER[EDLP]
-	orr	r0, r0, #DMCIER_EDLP
-	str	r0, [r1, #DMCIER]
+	ldr	r0, [r1, #PXA3_DMCIER]		@ set DMIER[EDLP]
+	orr	r0, r0, #PXA3_DMCIER_EDLP
+	str	r0, [r1, #PXA3_DMCIER]
 
-	ldr	r0, [r1, #DDR_HCAL]	@ clear HCRNG, set HCPROG, HCEN
-	bic	r0, r0, #DDR_HCAL_HCRNG
-	orr	r0, r0, #DDR_HCAL_HCEN | DDR_HCAL_HCPROG
-	str	r0, [r1, #DDR_HCAL]
+	ldr	r0, [r1, #PXA3_DDR_HCAL]	@ clear HCRNG, set HCPROG, HCEN
+	bic	r0, r0, #PXA3_DDR_HCAL_HCRNG
+	orr	r0, r0, #PXA3_DDR_HCAL_HCEN | PXA3_DDR_HCAL_HCPROG
+	str	r0, [r1, #PXA3_DDR_HCAL]
 
-1:	ldr	r0, [r1, #DMCISR]
-	tst	r0, #DMCIER_EDLP
+1:	ldr	r0, [r1, #PXA3_DMCISR]
+	tst	r0, #PXA3_DMCIER_EDLP
 	beq	1b
 
-	ldr	r0, [r1, #MDCNFG]	@ set MDCNFG[DMCEN]
-	orr	r0, r0, #MDCNFG_DMCEN
-	str	r0, [r1, #MDCNFG]
-1:	ldr	r0, [r1, #MDCNFG]
-	tst	r0, #MDCNFG_DMCEN
+	ldr	r0, [r1, #PXA3_MDCNFG]		@ set PXA3_MDCNFG[DMCEN]
+	orr	r0, r0, #PXA3_MDCNFG_DMCEN
+	str	r0, [r1, #PXA3_MDCNFG]
+1:	ldr	r0, [r1, #PXA3_MDCNFG]
+	tst	r0, #PXA3_MDCNFG_DMCEN
 	beq	1b
 
-	ldr	r0, [r1, #DDR_HCAL]	@ set DDR_HCAL[HCRNG]
+	ldr	r0, [r1, #PXA3_DDR_HCAL]	@ set PXA3_DDR_HCAL[HCRNG]
 	orr	r0, r0, #2 @ HCRNG
-	str	r0, [r1, #DDR_HCAL]
+	str	r0, [r1, #PXA3_DDR_HCAL]
 
-	ldr	r0, [r1, #DMCIER]	@ Clear the interrupt
+	ldr	r0, [r1, #PXA3_DMCIER]		@ Clear the interrupt
 	bic	r0, r0, #0x20000000
-	str	r0, [r1, #DMCIER]
+	str	r0, [r1, #PXA3_DMCIER]
 
 	mov	pc, lr
 ENTRY(pm_enter_standby_end)

arch/arm/mach-pxa/trizeps4.c

@@ -41,6 +41,7 @@
 #include <asm/mach/flash.h>
 
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include <asm/arch/trizeps4.h>
 #include <asm/arch/audio.h>
@@ -487,6 +488,7 @@ static void __init trizeps4_map_io(void)
 	ConXS_BCR = trizeps_conxs_bcr;
 #endif
 
+#warning FIXME - accessing PM registers directly is deprecated
 	PWER  = 0x00000002;
 	PFER  = 0x00000000;
 	PRER  = 0x00000002;

arch/arm/mach-pxa/zylonite.c

@@ -18,6 +18,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -28,12 +29,12 @@
 #include <asm/arch/mmc.h>
 #include <asm/arch/pxa27x_keypad.h>
 
+#include "devices.h"
 #include "generic.h"
 
 #define MAX_SLOTS	3
 struct platform_mmc_slot zylonite_mmc_slot[MAX_SLOTS];
 
-int gpio_backlight;
 int gpio_eth_irq;
 
 int wm9713_irq;
@@ -62,10 +63,20 @@ static struct platform_device smc91x_device = {
 };
 
 #if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
-static void zylonite_backlight_power(int on)
-{
-	gpio_set_value(gpio_backlight, on);
-}
+static struct platform_pwm_backlight_data zylonite_backlight_data = {
+	.pwm_id		= 3,
+	.max_brightness	= 100,
+	.dft_brightness	= 100,
+	.pwm_period_ns	= 10000,
+};
+
+static struct platform_device zylonite_backlight_device = {
+	.name		= "pwm-backlight",
+	.dev		= {
+		.parent = &pxa27x_device_pwm1.dev,
+		.platform_data	= &zylonite_backlight_data,
+	},
+};
 
 static struct pxafb_mode_info toshiba_ltm035a776c_mode = {
 	.pixclock		= 110000,
@@ -98,7 +109,6 @@ static struct pxafb_mode_info toshiba_ltm04c380k_mode = {
 static struct pxafb_mach_info zylonite_toshiba_lcd_info = {
 	.num_modes      	= 1,
 	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
-	.pxafb_backlight_power	= zylonite_backlight_power,
 };
 
 static struct pxafb_mode_info sharp_ls037_modes[] = {
@@ -134,13 +144,11 @@ static struct pxafb_mach_info zylonite_sharp_lcd_info = {
 	.modes			= sharp_ls037_modes,
 	.num_modes		= 2,
 	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
-	.pxafb_backlight_power	= zylonite_backlight_power,
 };
 
 static void __init zylonite_init_lcd(void)
 {
-	/* backlight GPIO: output, default on */
-	gpio_direction_output(gpio_backlight, 1);
+	platform_device_register(&zylonite_backlight_device);
 
 	if (lcd_id & 0x20) {
 		set_pxa_fb_info(&zylonite_sharp_lcd_info);

arch/arm/mach-pxa/zylonite_pxa300.c

@@ -50,6 +50,7 @@ static mfp_cfg_t common_mfp_cfg[] __initdata = {
 	GPIO75_LCD_BIAS,
 	GPIO76_LCD_VSYNC,
 	GPIO127_LCD_CS_N,
+	GPIO20_PWM3_OUT,	/* backlight */
 
 	/* BTUART */
 	GPIO111_UART2_RTS,
@@ -200,9 +201,6 @@ void __init zylonite_pxa300_init(void)
 		/* detect LCD panel */
 		zylonite_detect_lcd_panel();
 
-		/* GPIO pin assignment */
-		gpio_backlight = mfp_to_gpio(MFP_PIN_GPIO20);
-
 		/* MMC card detect & write protect for controller 0 */
 		zylonite_mmc_slot[0].gpio_cd  = EXT_GPIO(0);
 		zylonite_mmc_slot[0].gpio_wp  = EXT_GPIO(2);

arch/arm/mach-pxa/zylonite_pxa320.c

@@ -49,6 +49,7 @@ static mfp_cfg_t mfp_cfg[] __initdata = {
 	GPIO15_2_LCD_LCLK,
 	GPIO16_2_LCD_PCLK,
 	GPIO17_2_LCD_BIAS,
+	GPIO14_PWM3_OUT,	/* backlight */
 
 	/* FFUART */
 	GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
@@ -187,7 +188,6 @@ void __init zylonite_pxa320_init(void)
 		zylonite_detect_lcd_panel();
 
 		/* GPIO pin assignment */
-		gpio_backlight	= mfp_to_gpio(MFP_PIN_GPIO14);
 		gpio_eth_irq	= mfp_to_gpio(MFP_PIN_GPIO9);
 
 		/* MMC card detect & write protect for controller 0 */

drivers/i2c/busses/i2c-pxa.c

@@ -944,32 +944,6 @@ static const struct i2c_algorithm i2c_pxa_pio_algorithm = {
 	.functionality	= i2c_pxa_functionality,
 };
 
-static void i2c_pxa_enable(struct platform_device *dev)
-{
-	if (cpu_is_pxa27x()) {
-		switch (dev->id) {
-		case 0:
-			pxa_gpio_mode(GPIO117_I2CSCL_MD);
-			pxa_gpio_mode(GPIO118_I2CSDA_MD);
-			break;
-		case 1:
-			local_irq_disable();
-			PCFR |= PCFR_PI2CEN;
-			local_irq_enable();
-			break;
-		}
-	}
-}
-
-static void i2c_pxa_disable(struct platform_device *dev)
-{
-	if (cpu_is_pxa27x() && dev->id == 1) {
-		local_irq_disable();
-		PCFR &= ~PCFR_PI2CEN;
-		local_irq_enable();
-	}
-}
-
 #define res_len(r)		((r)->end - (r)->start + 1)
 static int i2c_pxa_probe(struct platform_device *dev)
 {
@@ -1035,7 +1009,6 @@ static int i2c_pxa_probe(struct platform_device *dev)
 #endif
 
 	clk_enable(i2c->clk);
-	i2c_pxa_enable(dev);
 
 	if (plat) {
 		i2c->adap.class = plat->class;
@@ -1079,7 +1052,6 @@ static int i2c_pxa_probe(struct platform_device *dev)
 		free_irq(irq, i2c);
 ereqirq:
 	clk_disable(i2c->clk);
-	i2c_pxa_disable(dev);
 	iounmap(i2c->reg_base);
 eremap:
 	clk_put(i2c->clk);
@@ -1102,7 +1074,6 @@ static int __exit i2c_pxa_remove(struct platform_device *dev)
 
 	clk_disable(i2c->clk);
 	clk_put(i2c->clk);
-	i2c_pxa_disable(dev);
 
 	iounmap(i2c->reg_base);
 	release_mem_region(i2c->iobase, i2c->iosize);

drivers/pcmcia/pxa2xx_cm_x270.c

@@ -18,6 +18,7 @@
 
 #include <pcmcia/ss.h>
 #include <asm/hardware.h>
+#include <asm/mach-types.h>
 
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
@@ -130,7 +131,7 @@ static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 }
 
 
-static struct pcmcia_low_level cmx270_pcmcia_ops = {
+static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
 	.owner			= THIS_MODULE,
 	.hw_init		= cmx270_pcmcia_hw_init,
 	.hw_shutdown		= cmx270_pcmcia_shutdown,
@@ -147,15 +148,21 @@ static int __init cmx270_pcmcia_init(void)
 {
 	int ret;
 
+	if (!machine_is_armcore())
+		return -ENODEV;
+
 	cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 
 	if (!cmx270_pcmcia_device)
 		return -ENOMEM;
 
-	cmx270_pcmcia_device->dev.platform_data = &cmx270_pcmcia_ops;
+	ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
+				       sizeof(cmx270_pcmcia_ops));
 
-	printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
-	ret = platform_device_add(cmx270_pcmcia_device);
+	if (ret == 0) {
+		printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
+		ret = platform_device_add(cmx270_pcmcia_device);
+	}
 
 	if (ret)
 		platform_device_put(cmx270_pcmcia_device);

drivers/pcmcia/pxa2xx_mainstone.c

@@ -22,6 +22,7 @@
 #include <pcmcia/ss.h>
 
 #include <asm/hardware.h>
+#include <asm/mach-types.h>
 #include <asm/irq.h>
 
 #include <asm/arch/pxa-regs.h>
@@ -136,7 +137,7 @@ static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 {
 }
 
-static struct pcmcia_low_level mst_pcmcia_ops = {
+static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
 	.owner			= THIS_MODULE,
 	.hw_init		= mst_pcmcia_hw_init,
 	.hw_shutdown		= mst_pcmcia_hw_shutdown,
@@ -153,13 +154,17 @@ static int __init mst_pcmcia_init(void)
 {
 	int ret;
 
+	if (!machine_is_mainstone())
+		return -ENODEV;
+
 	mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 	if (!mst_pcmcia_device)
 		return -ENOMEM;
 
-	mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
-
-	ret = platform_device_add(mst_pcmcia_device);
+	ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
+				       sizeof(mst_pcmcia_ops));
+	if (ret == 0)
+		ret = platform_device_add(mst_pcmcia_device);
 
 	if (ret)
 		platform_device_put(mst_pcmcia_device);

drivers/pcmcia/pxa2xx_sharpsl.c

@@ -222,7 +222,7 @@ static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 	sharpsl_pcmcia_init_reset(skt);
 }
 
-static struct pcmcia_low_level sharpsl_pcmcia_ops = {
+static struct pcmcia_low_level sharpsl_pcmcia_ops __initdata = {
 	.owner                  = THIS_MODULE,
 	.hw_init                = sharpsl_pcmcia_hw_init,
 	.hw_shutdown            = sharpsl_pcmcia_hw_shutdown,
@@ -261,10 +261,12 @@ static int __init sharpsl_pcmcia_init(void)
 	if (!sharpsl_pcmcia_device)
 		return -ENOMEM;
 
-	sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
-	sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
-
-	ret = platform_device_add(sharpsl_pcmcia_device);
+	ret = platform_device_add_data(sharpsl_pcmcia_device,
+			&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
+	if (ret == 0) {
+		sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
+		ret = platform_device_add(sharpsl_pcmcia_device);
+	}
 
 	if (ret)
 		platform_device_put(sharpsl_pcmcia_device);

drivers/usb/gadget/pxa27x_udc.c

@@ -38,7 +38,7 @@
 #include <linux/usb.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
-
+#include <asm/arch/pxa2xx-regs.h> /* FIXME: for PSSR */
 #include <asm/arch/udc.h>
 
 #include "pxa27x_udc.h"
@@ -2359,7 +2359,8 @@ static int pxa_udc_resume(struct platform_device *_dev)
 	 * Software must configure the USB OTG pad, UDC, and UHC
 	 * to the state they were in before entering sleep mode.
 	 */
-	PSSR |= PSSR_OTGPH;
+	if (cpu_is_pxa27x())
+		PSSR |= PSSR_OTGPH;
 
 	return 0;
 }

drivers/usb/gadget/pxa27x_udc.h

@@ -484,12 +484,4 @@ static inline struct pxa_udc *to_gadget_udc(struct usb_gadget *gadget)
 #define ep_warn(ep, fmt, arg...) \
 	dev_warn(ep->dev->dev, "%s:%s:" fmt, EPNAME(ep), __func__, ## arg)
 
-/*
- * Cannot include pxa-regs.h, as register names are similar.
- * So PSSR is redefined here. This should be removed once UDC registers will
- * be gone from pxa-regs.h.
- */
-#define PSSR		__REG(0x40F00004)	/* Power Manager Sleep Status */
-#define PSSR_OTGPH	(1 << 6)		/* OTG Peripheral Hold */
-
 #endif /* __LINUX_USB_GADGET_PXA27X_H */

drivers/usb/gadget/pxa2xx_udc.c

@@ -46,19 +46,25 @@
 #include <linux/err.h>
 #include <linux/seq_file.h>
 #include <linux/debugfs.h>
+#include <linux/io.h>
 
 #include <asm/byteorder.h>
 #include <asm/dma.h>
 #include <asm/gpio.h>
-#include <asm/io.h>
 #include <asm/system.h>
 #include <asm/mach-types.h>
 #include <asm/unaligned.h>
-#include <asm/hardware.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 
+/*
+ * This driver is PXA25x only.  Grab the right register definitions.
+ */
+#ifdef CONFIG_ARCH_PXA
+#include <asm/arch/pxa25x-udc.h>
+#endif
+
 #include <asm/mach/udc_pxa2xx.h>
 
 

drivers/usb/host/ohci-pxa27x.c

@@ -27,6 +27,7 @@
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
 #include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h> /* FIXME: for PSSR */
 #include <asm/arch/ohci.h>
 
 #define PXA_UHC_MAX_PORTNUM    3
@@ -104,7 +105,7 @@ static int pxa27x_start_hc(struct device *dev)
 	UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
 
 	/* Clear any OTG Pin Hold */
-	if (PSSR & PSSR_OTGPH)
+	if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
 		PSSR |= PSSR_OTGPH;
 
 	return 0;

drivers/video/backlight/Kconfig

@@ -112,3 +112,10 @@ config BACKLIGHT_CARILLO_RANCH
 	help
 	  If you have a Intel LE80578 (Carillo Ranch) say Y to enable the
 	  backlight driver.
+
+config BACKLIGHT_PWM
+	tristate "Generic PWM based Backlight Driver"
+	depends on BACKLIGHT_CLASS_DEVICE && HAVE_PWM
+	help
+	  If you have a LCD backlight adjustable by PWM, say Y to enable
+	  this driver.

drivers/video/backlight/Makefile

@@ -10,3 +10,4 @@ obj-$(CONFIG_BACKLIGHT_LOCOMO)	+= locomolcd.o
 obj-$(CONFIG_BACKLIGHT_OMAP1)	+= omap1_bl.o
 obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o
 obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o
+obj-$(CONFIG_BACKLIGHT_PWM)	+= pwm_bl.o

drivers/video/backlight/pwm_bl.c

+/*
+ * linux/drivers/video/backlight/pwm_bl.c
+ *
+ * simple PWM based backlight control, board code has to setup
+ * 1) pin configuration so PWM waveforms can output
+ * 2) platform_data casts to the PWM id (0/1/2/3 on PXA)
+ *
+ * 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/err.h>
+#include <linux/pwm.h>
+#include <linux/pwm_backlight.h>
+
+struct pwm_bl_data {
+	struct pwm_device	*pwm;
+	unsigned int		period;
+	int			(*notify)(int brightness);
+};
+
+static int pwm_backlight_update_status(struct backlight_device *bl)
+{
+	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+	int brightness = bl->props.brightness;
+	int max = bl->props.max_brightness;
+
+	if (bl->props.power != FB_BLANK_UNBLANK)
+		brightness = 0;
+
+	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+		brightness = 0;
+
+	if (pb->notify)
+		brightness = pb->notify(brightness);
+
+	if (brightness == 0) {
+		pwm_config(pb->pwm, 0, pb->period);
+		pwm_disable(pb->pwm);
+	} else {
+		pwm_config(pb->pwm, brightness * pb->period / max, pb->period);
+		pwm_enable(pb->pwm);
+	}
+	return 0;
+}
+
+static int pwm_backlight_get_brightness(struct backlight_device *bl)
+{
+	return bl->props.brightness;
+}
+
+static struct backlight_ops pwm_backlight_ops = {
+	.update_status	= pwm_backlight_update_status,
+	.get_brightness	= pwm_backlight_get_brightness,
+};
+
+static int pwm_backlight_probe(struct platform_device *pdev)
+{
+	struct platform_pwm_backlight_data *data = pdev->dev.platform_data;
+	struct backlight_device *bl;
+	struct pwm_bl_data *pb;
+	int ret;
+
+	if (!data)
+		return -EINVAL;
+
+	if (data->init) {
+		ret = data->init(&pdev->dev);
+		if (ret < 0)
+			return ret;
+	}
+
+	pb = kzalloc(sizeof(*pb), GFP_KERNEL);
+	if (!pb) {
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
+
+	pb->period = data->pwm_period_ns;
+	pb->notify = data->notify;
+
+	pb->pwm = pwm_request(data->pwm_id, "backlight");
+	if (IS_ERR(pb->pwm)) {
+		dev_err(&pdev->dev, "unable to request PWM for backlight\n");
+		ret = PTR_ERR(pb->pwm);
+		goto err_pwm;
+	}
+
+	bl = backlight_device_register(pdev->name, &pdev->dev,
+			pb, &pwm_backlight_ops);
+	if (IS_ERR(bl)) {
+		dev_err(&pdev->dev, "failed to register backlight\n");
+		ret = PTR_ERR(bl);
+		goto err_bl;
+	}
+
+	bl->props.max_brightness = data->max_brightness;
+	bl->props.brightness = data->dft_brightness;
+	backlight_update_status(bl);
+
+	platform_set_drvdata(pdev, bl);
+	return 0;
+
+err_bl:
+	pwm_free(pb->pwm);
+err_pwm:
+	kfree(pb);
+err_alloc:
+	if (data->exit)
+		data->exit(&pdev->dev);
+	return ret;
+}
+
+static int pwm_backlight_remove(struct platform_device *pdev)
+{
+	struct platform_pwm_backlight_data *data = pdev->dev.platform_data;
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+
+	backlight_device_unregister(bl);
+	pwm_config(pb->pwm, 0, pb->period);
+	pwm_disable(pb->pwm);
+	pwm_free(pb->pwm);
+	kfree(pb);
+	if (data->exit)
+		data->exit(&pdev->dev);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int pwm_backlight_suspend(struct platform_device *pdev,
+				 pm_message_t state)
+{
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+
+	pwm_config(pb->pwm, 0, pb->period);
+	pwm_disable(pb->pwm);
+	return 0;
+}
+
+static int pwm_backlight_resume(struct platform_device *pdev)
+{
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+
+	backlight_update_status(bl);
+	return 0;
+}
+#else
+#define pwm_backlight_suspend	NULL
+#define pwm_backlight_resume	NULL
+#endif
+
+static struct platform_driver pwm_backlight_driver = {
+	.driver		= {
+		.name	= "pwm-backlight",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= pwm_backlight_probe,
+	.remove		= pwm_backlight_remove,
+	.suspend	= pwm_backlight_suspend,
+	.resume		= pwm_backlight_resume,
+};
+
+static int __init pwm_backlight_init(void)
+{
+	return platform_driver_register(&pwm_backlight_driver);
+}
+module_init(pwm_backlight_init);
+
+static void __exit pwm_backlight_exit(void)
+{
+	platform_driver_unregister(&pwm_backlight_driver);
+}
+module_exit(pwm_backlight_exit);
+
+MODULE_DESCRIPTION("PWM based Backlight Driver");
+MODULE_LICENSE("GPL");

include/asm-arm/arch-pxa/pxa25x-udc.h

+#ifndef _ASM_ARCH_PXA25X_UDC_H
+#define _ASM_ARCH_PXA25X_UDC_H
+
+#ifdef _ASM_ARCH_PXA27X_UDC_H
+#error You can't include both PXA25x and PXA27x UDC support
+#endif
+
+#define UDC_RES1	__REG(0x40600004)  /* UDC Undocumented - Reserved1 */
+#define UDC_RES2	__REG(0x40600008)  /* UDC Undocumented - Reserved2 */
+#define UDC_RES3	__REG(0x4060000C)  /* UDC Undocumented - Reserved3 */
+
+#define UDCCR		__REG(0x40600000)  /* UDC Control Register */
+#define UDCCR_UDE	(1 << 0)	/* UDC enable */
+#define UDCCR_UDA	(1 << 1)	/* UDC active */
+#define UDCCR_RSM	(1 << 2)	/* Device resume */
+#define UDCCR_RESIR	(1 << 3)	/* Resume interrupt request */
+#define UDCCR_SUSIR	(1 << 4)	/* Suspend interrupt request */
+#define UDCCR_SRM	(1 << 5)	/* Suspend/resume interrupt mask */
+#define UDCCR_RSTIR	(1 << 6)	/* Reset interrupt request */
+#define UDCCR_REM	(1 << 7)	/* Reset interrupt mask */
+
+#define UDCCS0		__REG(0x40600010)  /* UDC Endpoint 0 Control/Status Register */
+#define UDCCS0_OPR	(1 << 0)	/* OUT packet ready */
+#define UDCCS0_IPR	(1 << 1)	/* IN packet ready */
+#define UDCCS0_FTF	(1 << 2)	/* Flush Tx FIFO */
+#define UDCCS0_DRWF	(1 << 3)	/* Device remote wakeup feature */
+#define UDCCS0_SST	(1 << 4)	/* Sent stall */
+#define UDCCS0_FST	(1 << 5)	/* Force stall */
+#define UDCCS0_RNE	(1 << 6)	/* Receive FIFO no empty */
+#define UDCCS0_SA	(1 << 7)	/* Setup active */
+
+/* Bulk IN - Endpoint 1,6,11 */
+#define UDCCS1		__REG(0x40600014)  /* UDC Endpoint 1 (IN) Control/Status Register */
+#define UDCCS6		__REG(0x40600028)  /* UDC Endpoint 6 (IN) Control/Status Register */
+#define UDCCS11		__REG(0x4060003C)  /* UDC Endpoint 11 (IN) Control/Status Register */
+
+#define UDCCS_BI_TFS	(1 << 0)	/* Transmit FIFO service */
+#define UDCCS_BI_TPC	(1 << 1)	/* Transmit packet complete */
+#define UDCCS_BI_FTF	(1 << 2)	/* Flush Tx FIFO */
+#define UDCCS_BI_TUR	(1 << 3)	/* Transmit FIFO underrun */
+#define UDCCS_BI_SST	(1 << 4)	/* Sent stall */
+#define UDCCS_BI_FST	(1 << 5)	/* Force stall */
+#define UDCCS_BI_TSP	(1 << 7)	/* Transmit short packet */
+
+/* Bulk OUT - Endpoint 2,7,12 */
+#define UDCCS2		__REG(0x40600018)  /* UDC Endpoint 2 (OUT) Control/Status Register */
+#define UDCCS7		__REG(0x4060002C)  /* UDC Endpoint 7 (OUT) Control/Status Register */
+#define UDCCS12		__REG(0x40600040)  /* UDC Endpoint 12 (OUT) Control/Status Register */
+
+#define UDCCS_BO_RFS	(1 << 0)	/* Receive FIFO service */
+#define UDCCS_BO_RPC	(1 << 1)	/* Receive packet complete */
+#define UDCCS_BO_DME	(1 << 3)	/* DMA enable */
+#define UDCCS_BO_SST	(1 << 4)	/* Sent stall */
+#define UDCCS_BO_FST	(1 << 5)	/* Force stall */
+#define UDCCS_BO_RNE	(1 << 6)	/* Receive FIFO not empty */
+#define UDCCS_BO_RSP	(1 << 7)	/* Receive short packet */
+
+/* Isochronous IN - Endpoint 3,8,13 */
+#define UDCCS3		__REG(0x4060001C)  /* UDC Endpoint 3 (IN) Control/Status Register */
+#define UDCCS8		__REG(0x40600030)  /* UDC Endpoint 8 (IN) Control/Status Register */
+#define UDCCS13		__REG(0x40600044)  /* UDC Endpoint 13 (IN) Control/Status Register */
+
+#define UDCCS_II_TFS	(1 << 0)	/* Transmit FIFO service */
+#define UDCCS_II_TPC	(1 << 1)	/* Transmit packet complete */
+#define UDCCS_II_FTF	(1 << 2)	/* Flush Tx FIFO */
+#define UDCCS_II_TUR	(1 << 3)	/* Transmit FIFO underrun */
+#define UDCCS_II_TSP	(1 << 7)	/* Transmit short packet */
+
+/* Isochronous OUT - Endpoint 4,9,14 */
+#define UDCCS4		__REG(0x40600020)  /* UDC Endpoint 4 (OUT) Control/Status Register */
+#define UDCCS9		__REG(0x40600034)  /* UDC Endpoint 9 (OUT) Control/Status Register */
+#define UDCCS14		__REG(0x40600048)  /* UDC Endpoint 14 (OUT) Control/Status Register */
+
+#define UDCCS_IO_RFS	(1 << 0)	/* Receive FIFO service */
+#define UDCCS_IO_RPC	(1 << 1)	/* Receive packet complete */
+#define UDCCS_IO_ROF	(1 << 2)	/* Receive overflow */
+#define UDCCS_IO_DME	(1 << 3)	/* DMA enable */
+#define UDCCS_IO_RNE	(1 << 6)	/* Receive FIFO not empty */
+#define UDCCS_IO_RSP	(1 << 7)	/* Receive short packet */
+
+/* Interrupt IN - Endpoint 5,10,15 */
+#define UDCCS5		__REG(0x40600024)  /* UDC Endpoint 5 (Interrupt) Control/Status Register */
+#define UDCCS10		__REG(0x40600038)  /* UDC Endpoint 10 (Interrupt) Control/Status Register */
+#define UDCCS15		__REG(0x4060004C)  /* UDC Endpoint 15 (Interrupt) Control/Status Register */
+
+#define UDCCS_INT_TFS	(1 << 0)	/* Transmit FIFO service */
+#define UDCCS_INT_TPC	(1 << 1)	/* Transmit packet complete */
+#define UDCCS_INT_FTF	(1 << 2)	/* Flush Tx FIFO */
+#define UDCCS_INT_TUR	(1 << 3)	/* Transmit FIFO underrun */
+#define UDCCS_INT_SST	(1 << 4)	/* Sent stall */
+#define UDCCS_INT_FST	(1 << 5)	/* Force stall */
+#define UDCCS_INT_TSP	(1 << 7)	/* Transmit short packet */
+
+#define UFNRH		__REG(0x40600060)  /* UDC Frame Number Register High */
+#define UFNRL		__REG(0x40600064)  /* UDC Frame Number Register Low */
+#define UBCR2		__REG(0x40600068)  /* UDC Byte Count Reg 2 */
+#define UBCR4		__REG(0x4060006c)  /* UDC Byte Count Reg 4 */
+#define UBCR7		__REG(0x40600070)  /* UDC Byte Count Reg 7 */
+#define UBCR9		__REG(0x40600074)  /* UDC Byte Count Reg 9 */
+#define UBCR12		__REG(0x40600078)  /* UDC Byte Count Reg 12 */
+#define UBCR14		__REG(0x4060007c)  /* UDC Byte Count Reg 14 */
+#define UDDR0		__REG(0x40600080)  /* UDC Endpoint 0 Data Register */
+#define UDDR1		__REG(0x40600100)  /* UDC Endpoint 1 Data Register */
+#define UDDR2		__REG(0x40600180)  /* UDC Endpoint 2 Data Register */
+#define UDDR3		__REG(0x40600200)  /* UDC Endpoint 3 Data Register */
+#define UDDR4		__REG(0x40600400)  /* UDC Endpoint 4 Data Register */
+#define UDDR5		__REG(0x406000A0)  /* UDC Endpoint 5 Data Register */
+#define UDDR6		__REG(0x40600600)  /* UDC Endpoint 6 Data Register */
+#define UDDR7		__REG(0x40600680)  /* UDC Endpoint 7 Data Register */
+#define UDDR8		__REG(0x40600700)  /* UDC Endpoint 8 Data Register */
+#define UDDR9		__REG(0x40600900)  /* UDC Endpoint 9 Data Register */
+#define UDDR10		__REG(0x406000C0)  /* UDC Endpoint 10 Data Register */
+#define UDDR11		__REG(0x40600B00)  /* UDC Endpoint 11 Data Register */
+#define UDDR12		__REG(0x40600B80)  /* UDC Endpoint 12 Data Register */
+#define UDDR13		__REG(0x40600C00)  /* UDC Endpoint 13 Data Register */
+#define UDDR14		__REG(0x40600E00)  /* UDC Endpoint 14 Data Register */
+#define UDDR15		__REG(0x406000E0)  /* UDC Endpoint 15 Data Register */
+
+#define UICR0		__REG(0x40600050)  /* UDC Interrupt Control Register 0 */
+
+#define UICR0_IM0	(1 << 0)	/* Interrupt mask ep 0 */
+#define UICR0_IM1	(1 << 1)	/* Interrupt mask ep 1 */
+#define UICR0_IM2	(1 << 2)	/* Interrupt mask ep 2 */
+#define UICR0_IM3	(1 << 3)	/* Interrupt mask ep 3 */
+#define UICR0_IM4	(1 << 4)	/* Interrupt mask ep 4 */
+#define UICR0_IM5	(1 << 5)	/* Interrupt mask ep 5 */
+#define UICR0_IM6	(1 << 6)	/* Interrupt mask ep 6 */
+#define UICR0_IM7	(1 << 7)	/* Interrupt mask ep 7 */
+
+#define UICR1		__REG(0x40600054)  /* UDC Interrupt Control Register 1 */
+
+#define UICR1_IM8	(1 << 0)	/* Interrupt mask ep 8 */
+#define UICR1_IM9	(1 << 1)	/* Interrupt mask ep 9 */
+#define UICR1_IM10	(1 << 2)	/* Interrupt mask ep 10 */
+#define UICR1_IM11	(1 << 3)	/* Interrupt mask ep 11 */
+#define UICR1_IM12	(1 << 4)	/* Interrupt mask ep 12 */
+#define UICR1_IM13	(1 << 5)	/* Interrupt mask ep 13 */
+#define UICR1_IM14	(1 << 6)	/* Interrupt mask ep 14 */
+#define UICR1_IM15	(1 << 7)	/* Interrupt mask ep 15 */
+
+#define USIR0		__REG(0x40600058)  /* UDC Status Interrupt Register 0 */
+
+#define USIR0_IR0	(1 << 0)	/* Interrupt request ep 0 */
+#define USIR0_IR1	(1 << 1)	/* Interrupt request ep 1 */
+#define USIR0_IR2	(1 << 2)	/* Interrupt request ep 2 */
+#define USIR0_IR3	(1 << 3)	/* Interrupt request ep 3 */
+#define USIR0_IR4	(1 << 4)	/* Interrupt request ep 4 */
+#define USIR0_IR5	(1 << 5)	/* Interrupt request ep 5 */
+#define USIR0_IR6	(1 << 6)	/* Interrupt request ep 6 */
+#define USIR0_IR7	(1 << 7)	/* Interrupt request ep 7 */
+
+#define USIR1		__REG(0x4060005C)  /* UDC Status Interrupt Register 1 */
+
+#define USIR1_IR8	(1 << 0)	/* Interrupt request ep 8 */
+#define USIR1_IR9	(1 << 1)	/* Interrupt request ep 9 */
+#define USIR1_IR10	(1 << 2)	/* Interrupt request ep 10 */
+#define USIR1_IR11	(1 << 3)	/* Interrupt request ep 11 */
+#define USIR1_IR12	(1 << 4)	/* Interrupt request ep 12 */
+#define USIR1_IR13	(1 << 5)	/* Interrupt request ep 13 */
+#define USIR1_IR14	(1 << 6)	/* Interrupt request ep 14 */
+#define USIR1_IR15	(1 << 7)	/* Interrupt request ep 15 */
+
+#endif

include/asm-arm/arch-pxa/system.h

@@ -12,6 +12,7 @@
 
 #include <asm/proc-fns.h>
 #include "hardware.h"
+#include "pxa2xx-regs.h"
 #include "pxa-regs.h"
 
 static inline void arch_idle(void)

include/asm-arm/arch-pxa/zylonite.h

@@ -15,7 +15,6 @@ struct platform_mmc_slot {
 
 extern struct platform_mmc_slot zylonite_mmc_slot[];
 
-extern int gpio_backlight;
 extern int gpio_eth_irq;
 
 extern int wm9713_irq;

include/linux/pwm.h

+#ifndef __LINUX_PWM_H
+#define __LINUX_PWM_H
+
+struct pwm_device;
+
+/*
+ * pwm_request - request a PWM device
+ */
+struct pwm_device *pwm_request(int pwm_id, const char *label);
+
+/*
+ * pwm_free - free a PWM device
+ */
+void pwm_free(struct pwm_device *pwm);
+
+/*
+ * pwm_config - change a PWM device configuration
+ */
+int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);
+
+/*
+ * pwm_enable - start a PWM output toggling
+ */
+int pwm_enable(struct pwm_device *pwm);
+
+/*
+ * pwm_disable - stop a PWM output toggling
+ */
+void pwm_disable(struct pwm_device *pwm);
+
+#endif /* __ASM_ARCH_PWM_H */

include/linux/pwm_backlight.h

+/*
+ * Generic PWM backlight driver data - see drivers/video/backlight/pwm_bl.c
+ */
+#ifndef __LINUX_PWM_BACKLIGHT_H
+#define __LINUX_PWM_BACKLIGHT_H
+
+struct platform_pwm_backlight_data {
+	int pwm_id;
+	unsigned int max_brightness;
+	unsigned int dft_brightness;
+	unsigned int pwm_period_ns;
+	int (*init)(struct device *dev);
+	int (*notify)(int brightness);
+	void (*exit)(struct device *dev);
+};
+
+#endif