Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight:
gta02: Use pcf50633 backlight driver instead of platform backlight driver.
backlight: pcf50633: Register a pcf50633-backlight device in pcf50633 core driver.
backlight: Add pcf50633 backlight driver
backlight: 88pm860x_bl: fix error handling in pm860x_backlight_probe
backlight: max8925_bl: Fix error handling path
backlight: l4f00242t03: fix error handling in l4f00242t03_probe
backlight: add S6E63M0 AMOLED LCD Panel driver
backlight: adp8860: add support for ADP8861 & ADP8863
backlight: mbp_nvidia_bl - Fix DMI_SYS_VENDOR for MacBook1,1
backlight: Add Cirrus EP93xx backlight driver
backlight: l4f00242t03: Fix regulators handling code in remove function
backlight: fix adp8860_bl build errors
backlight: new driver for the ADP8860 backlight parts
backlight: 88pm860x_bl - potential memory leak
backlight: mbp_nvidia_bl - add support for older MacBookPro and MacBook 6,1.
backlight: Kconfig cleanup
backlight: backlight_device_register() return ERR_PTR()

arch/arm/mach-s3c2440/mach-gta02.c

···
 #include <linux/io.h>
 
 #include <linux/i2c.h>
-#include <linux/backlight.h>
 #include <linux/regulator/machine.h>
 
 #include <linux/mfd/pcf50633/core.h>
···
 #include <linux/mfd/pcf50633/adc.h>
 #include <linux/mfd/pcf50633/gpio.h>
 #include <linux/mfd/pcf50633/pmic.h>
+#include <linux/mfd/pcf50633/backlight.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
···
 	"battery",
 };
 
+static struct pcf50633_bl_platform_data gta02_backlight_data = {
+	.default_brightness = 0x3f,
+	.default_brightness_limit = 0,
+	.ramp_time = 5,
+};
+
 struct pcf50633_platform_data gta02_pcf_pdata = {
 	.resumers = {
 		[0] =	PCF50633_INT1_USBINS |
···
 	.num_batteries = ARRAY_SIZE(gta02_batteries),
 
 	.charger_reference_current_ma = 1000,
+
+	.backlight_data = &gta02_backlight_data,
 
 	.reg_init_data = {
 		[PCF50633_REGULATOR_AUTO] = {
···
 
 };
 
-
-
-static void gta02_bl_set_intensity(int intensity)
-{
-	struct pcf50633 *pcf = gta02_pcf;
-	int old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
-
-	/* We map 8-bit intensity to 6-bit intensity in hardware. */
-	intensity >>= 2;
-
-	/*
-	 * This can happen during, eg, print of panic on blanked console,
-	 * but we can't service i2c without interrupts active, so abort.
-	 */
-	if (in_atomic()) {
-		printk(KERN_ERR "gta02_bl_set_intensity called while atomic\n");
-		return;
-	}
-
-	old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
-	if (intensity == old_intensity)
-		return;
-
-	/* We can't do this anywhere else. */
-	pcf50633_reg_write(pcf, PCF50633_REG_LEDDIM, 5);
-
-	if (!(pcf50633_reg_read(pcf, PCF50633_REG_LEDENA) & 3))
-		old_intensity = 0;
-
-	/*
-	 * The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
-	 * if seen, you have to re-enable the LED unit.
-	 */
-	if (!intensity || !old_intensity)
-		pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0);
-
-	/* Illegal to set LEDOUT to 0. */
-	if (!intensity)
-		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
-	else
-		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
-					  intensity);
-
-	if (intensity)
-		pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 2);
-
-}
-
-static struct generic_bl_info gta02_bl_info = {
-	.name			= "gta02-bl",
-	.max_intensity		= 0xff,
-	.default_intensity	= 0xff,
-	.set_bl_intensity	= gta02_bl_set_intensity,
-};
-
-static struct platform_device gta02_bl_dev = {
-	.name			= "generic-bl",
-	.id			= 1,
-	.dev = {
-		.platform_data = &gta02_bl_info,
-	},
-};
-
-
-
 /* USB */
 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 	.port[0]	= {
···
 /* These guys DO need to be children of PMU. */
 
 static struct platform_device *gta02_devices_pmu_children[] = {
-	&gta02_bl_dev,
 };
 
 

drivers/mfd/pcf50633-core.c

···
 						&pcf->mbc_pdev);
 	pcf50633_client_dev_register(pcf, "pcf50633-adc",
 						&pcf->adc_pdev);
+	pcf50633_client_dev_register(pcf, "pcf50633-backlight",
+						&pcf->bl_pdev);
+
 
 	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
 		struct platform_device *pdev;

drivers/video/backlight/88pm860x_bl.c

···
 	data->port = __check_device(pdata, name);
 	if (data->port < 0) {
 		dev_err(&pdev->dev, "wrong platform data is assigned");
+		kfree(data);
 		return -EINVAL;
 	}
 
···
 	backlight_update_status(bl);
 	return 0;
 out:
+	backlight_device_unregister(bl);
 	kfree(data);
 	return ret;
 }

drivers/video/backlight/Kconfig

···
 	  Enable this to be able to choose the drivers for controlling the
 	  backlight and the LCD panel on some platforms, for example on PDAs.
 
+if BACKLIGHT_LCD_SUPPORT
+
 #
 # LCD
 #
 config LCD_CLASS_DEVICE
         tristate "Lowlevel LCD controls"
-	depends on BACKLIGHT_LCD_SUPPORT
 	default m
 	help
 	  This framework adds support for low-level control of LCD.
···
 	  To have support for your specific LCD panel you will have to
 	  select the proper drivers which depend on this option.
 
+if LCD_CLASS_DEVICE
+
 config LCD_CORGI
 	tristate "LCD Panel support for SHARP corgi/spitz model"
-	depends on LCD_CLASS_DEVICE && SPI_MASTER && PXA_SHARPSL
+	depends on SPI_MASTER && PXA_SHARPSL
 	help
 	  Say y here to support the LCD panels usually found on SHARP
 	  corgi (C7x0) and spitz (Cxx00) models.
 
 config LCD_L4F00242T03
 	tristate "Epson L4F00242T03 LCD"
-	depends on LCD_CLASS_DEVICE && SPI_MASTER && GENERIC_GPIO
+	depends on SPI_MASTER && GENERIC_GPIO
 	help
 	  SPI driver for Epson L4F00242T03. This provides basic support
 	  for init and powering the LCD up/down through a sysfs interface.
 
 config LCD_LMS283GF05
 	tristate "Samsung LMS283GF05 LCD"
-	depends on LCD_CLASS_DEVICE && SPI_MASTER && GENERIC_GPIO
+	depends on SPI_MASTER && GENERIC_GPIO
 	help
 	  SPI driver for Samsung LMS283GF05. This provides basic support
 	  for powering the LCD up/down through a sysfs interface.
 
 config LCD_LTV350QV
 	tristate "Samsung LTV350QV LCD Panel"
-	depends on LCD_CLASS_DEVICE && SPI_MASTER
-	default n
+	depends on SPI_MASTER
 	help
 	  If you have a Samsung LTV350QV LCD panel, say y to include a
 	  power control driver for it.  The panel starts up in power
···
 
 config LCD_ILI9320
 	tristate
-	depends on LCD_CLASS_DEVICE && BACKLIGHT_LCD_SUPPORT
-	default n
 	help
 	  If you have a panel based on the ILI9320 controller chip
 	  then say y to include a power driver for it.
 
 config LCD_TDO24M
 	tristate "Toppoly TDO24M  and TDO35S LCD Panels support"
-	depends on LCD_CLASS_DEVICE && SPI_MASTER
-	default n
+	depends on SPI_MASTER
 	help
 	  If you have a Toppoly TDO24M/TDO35S series LCD panel, say y here to
 	  include the support for it.
 
 config LCD_VGG2432A4
 	tristate "VGG2432A4 LCM device support"
-	depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER
+	depends on SPI_MASTER
 	select LCD_ILI9320
-	default n
 	help
 	  If you have a VGG2432A4 panel based on the ILI9320 controller chip
 	  then say y to include a power driver for it.
 
 config LCD_PLATFORM
 	tristate "Platform LCD controls"
-	depends on LCD_CLASS_DEVICE
 	help
 	  This driver provides a platform-device registered LCD power
 	  control interface.
 
 config LCD_TOSA
 	tristate "Sharp SL-6000 LCD Driver"
-	depends on LCD_CLASS_DEVICE && SPI
-	depends on MACH_TOSA
-	default n
+	depends on SPI && MACH_TOSA
 	help
 	  If you have an Sharp SL-6000 Zaurus say Y to enable a driver
 	  for its LCD.
 
 config LCD_HP700
 	tristate "HP Jornada 700 series LCD Driver"
-	depends on LCD_CLASS_DEVICE
 	depends on SA1100_JORNADA720_SSP && !PREEMPT
 	default y
 	help
 	  If you have an HP Jornada 700 series handheld (710/720/728)
 	  say Y to enable LCD control driver.
 
+config LCD_S6E63M0
+	tristate "S6E63M0 AMOLED LCD Driver"
+	depends on SPI && BACKLIGHT_CLASS_DEVICE
+	default n
+	help
+	  If you have an S6E63M0 LCD Panel, say Y to enable its
+	  LCD control driver.
+
+endif # LCD_CLASS_DEVICE
+
 #
 # Backlight
 #
 config BACKLIGHT_CLASS_DEVICE
         tristate "Lowlevel Backlight controls"
-	depends on BACKLIGHT_LCD_SUPPORT
 	default m
 	help
 	  This framework adds support for low-level control of the LCD
···
 	  To have support for your specific LCD panel you will have to
 	  select the proper drivers which depend on this option.
 
+if BACKLIGHT_CLASS_DEVICE
+
 config BACKLIGHT_ATMEL_LCDC
 	bool "Atmel LCDC Contrast-as-Backlight control"
-	depends on BACKLIGHT_CLASS_DEVICE && FB_ATMEL
+	depends on FB_ATMEL
 	default y if MACH_SAM9261EK || MACH_SAM9G10EK || MACH_SAM9263EK
 	help
 	  This provides a backlight control internal to the Atmel LCDC
···
 
 config BACKLIGHT_ATMEL_PWM
 	tristate "Atmel PWM backlight control"
-	depends on BACKLIGHT_CLASS_DEVICE && ATMEL_PWM
-	default n
+	depends on ATMEL_PWM
 	help
 	  Say Y here if you want to use the PWM peripheral in Atmel AT91 and
 	  AVR32 devices. This driver will need additional platform data to know
···
 	  To compile this driver as a module, choose M here: the module will be
 	  called atmel-pwm-bl.
 
+config BACKLIGHT_EP93XX
+	tristate "Cirrus EP93xx Backlight Driver"
+	depends on FB_EP93XX
+	help
+	  If you have a LCD backlight connected to the BRIGHT output of
+	  the EP93xx, say Y here to enable this driver.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called ep93xx_bl.
+
 config BACKLIGHT_GENERIC
 	tristate "Generic (aka Sharp Corgi) Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE
 	default y
 	help
 	  Say y to enable the generic platform backlight driver previously
···
 
 config BACKLIGHT_LOCOMO
 	tristate "Sharp LOCOMO LCD/Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && SHARP_LOCOMO
+	depends on SHARP_LOCOMO
 	default y
 	help
 	  If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to
···
 
 config BACKLIGHT_OMAP1
 	tristate "OMAP1 PWL-based LCD Backlight"
-	depends on BACKLIGHT_CLASS_DEVICE && ARCH_OMAP1
+	depends on ARCH_OMAP1
 	default y
 	help
 	  This driver controls the LCD backlight level and power for
···
 
 config BACKLIGHT_HP680
 	tristate "HP Jornada 680 Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX
+	depends on SH_HP6XX
 	default y
 	help
 	  If you have a HP Jornada 680, say y to enable the
···
 
 config BACKLIGHT_HP700
 	tristate "HP Jornada 700 series Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE
 	depends on SA1100_JORNADA720_SSP && !PREEMPT
 	default y
 	help
···
 
 config BACKLIGHT_PROGEAR
 	tristate "Frontpath ProGear Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && PCI && X86
-	default n
+	depends on PCI && X86
 	help
 	  If you have a Frontpath ProGear say Y to enable the
 	  backlight driver.
 
 config BACKLIGHT_CARILLO_RANCH
 	tristate "Intel Carillo Ranch Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && LCD_CLASS_DEVICE && PCI && X86 && FB_LE80578
-	default n
+	depends on LCD_CLASS_DEVICE && PCI && X86 && FB_LE80578
 	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
+	depends on HAVE_PWM
 	help
 	  If you have a LCD backlight adjustable by PWM, say Y to enable
 	  this driver.
 
 config BACKLIGHT_DA903X
 	tristate "Backlight Driver for DA9030/DA9034 using WLED"
-	depends on BACKLIGHT_CLASS_DEVICE && PMIC_DA903X
+	depends on PMIC_DA903X
 	help
 	  If you have a LCD backlight connected to the WLED output of DA9030
 	  or DA9034 WLED output, say Y here to enable this driver.
 
 config BACKLIGHT_MAX8925
 	tristate "Backlight driver for MAX8925"
-	depends on BACKLIGHT_CLASS_DEVICE && MFD_MAX8925
+	depends on MFD_MAX8925
 	help
 	  If you have a LCD backlight connected to the WLED output of MAX8925
 	  WLED output, say Y here to enable this driver.
 
 config BACKLIGHT_MBP_NVIDIA
        tristate "MacBook Pro Nvidia Backlight Driver"
-       depends on BACKLIGHT_CLASS_DEVICE && X86
-       default n
+       depends on X86
        help
          If you have an Apple Macbook Pro with Nvidia graphics hardware say Y
 	 to enable a driver for its backlight
 
 config BACKLIGHT_TOSA
 	tristate "Sharp SL-6000 Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && I2C
-	depends on MACH_TOSA && LCD_TOSA
-	default n
+	depends on I2C && MACH_TOSA && LCD_TOSA
 	help
 	  If you have an Sharp SL-6000 Zaurus say Y to enable a driver
 	  for its backlight
 
 config BACKLIGHT_SAHARA
 	tristate "Tabletkiosk Sahara Touch-iT Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && X86
-	default n
+	depends on X86
 	help
 	  If you have a Tabletkiosk Sahara Touch-iT, say y to enable the
 	  backlight driver.
 
 config BACKLIGHT_WM831X
 	tristate "WM831x PMIC Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && MFD_WM831X
+	depends on MFD_WM831X
 	help
 	  If you have a backlight driven by the ISINK and DCDC of a
 	  WM831x PMIC say y to enable the backlight driver for it.
 
 config BACKLIGHT_ADX
 	tristate "Avionic Design Xanthos Backlight Driver"
-	depends on BACKLIGHT_CLASS_DEVICE && ARCH_PXA_ADX
+	depends on ARCH_PXA_ADX
 	default y
 	help
 	  Say Y to enable the backlight driver on Avionic Design Xanthos-based
···
 
 config BACKLIGHT_ADP5520
 	tristate "Backlight Driver for ADP5520/ADP5501 using WLED"
-	depends on BACKLIGHT_CLASS_DEVICE && PMIC_ADP5520
+	depends on PMIC_ADP5520
 	help
 	  If you have a LCD backlight connected to the BST/BL_SNK output of
 	  ADP5520 or ADP5501, say Y here to enable this driver.
···
 	  To compile this driver as a module, choose M here: the module will
 	  be called adp5520_bl.
 
+config BACKLIGHT_ADP8860
+	tristate "Backlight Driver for ADP8860/ADP8861/ADP8863 using WLED"
+	depends on BACKLIGHT_CLASS_DEVICE && I2C
+	select NEW_LEDS
+	select LEDS_CLASS
+	help
+	  If you have a LCD backlight connected to the ADP8860, ADP8861 or
+	  ADP8863 say Y here to enable this driver.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called adp8860_bl.
+
 config BACKLIGHT_88PM860X
 	tristate "Backlight Driver for 88PM8606 using WLED"
-	depends on BACKLIGHT_CLASS_DEVICE && MFD_88PM860X
+	depends on MFD_88PM860X
 	help
 	  Say Y to enable the backlight driver for Marvell 88PM8606.
 
+config BACKLIGHT_PCF50633
+	tristate "Backlight driver for NXP PCF50633 MFD"
+	depends on BACKLIGHT_CLASS_DEVICE && MFD_PCF50633
+	help
+	  If you have a backlight driven by a NXP PCF50633 MFD, say Y here to
+	  enable its driver.
+
+endif # BACKLIGHT_CLASS_DEVICE
+
+endif # BACKLIGHT_LCD_SUPPORT

drivers/video/backlight/Makefile

···
 obj-$(CONFIG_LCD_VGG2432A4)	   += vgg2432a4.o
 obj-$(CONFIG_LCD_TDO24M)	   += tdo24m.o
 obj-$(CONFIG_LCD_TOSA)		   += tosa_lcd.o
+obj-$(CONFIG_LCD_S6E63M0)	+= s6e63m0.o
 
 obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
 obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o
+obj-$(CONFIG_BACKLIGHT_EP93XX)	+= ep93xx_bl.o
 obj-$(CONFIG_BACKLIGHT_GENERIC)	+= generic_bl.o
 obj-$(CONFIG_BACKLIGHT_HP700)	+= jornada720_bl.o
 obj-$(CONFIG_BACKLIGHT_HP680)	+= hp680_bl.o
···
 obj-$(CONFIG_BACKLIGHT_WM831X)	+= wm831x_bl.o
 obj-$(CONFIG_BACKLIGHT_ADX)    += adx_bl.o
 obj-$(CONFIG_BACKLIGHT_ADP5520)	+= adp5520_bl.o
+obj-$(CONFIG_BACKLIGHT_ADP8860)	+= adp8860_bl.o
 obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
+obj-$(CONFIG_BACKLIGHT_PCF50633)	+= pcf50633-backlight.o
 

drivers/video/backlight/adp8860_bl.c

···
+/*
+ * Backlight driver for Analog Devices ADP8860 Backlight Devices
+ *
+ * Copyright 2009-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#include <linux/i2c/adp8860.h>
+#define ADP8860_EXT_FEATURES
+#define ADP8860_USE_LEDS
+
+#define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */
+#define ADP8860_MDCR 0x01 /* Device mode and status */
+#define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */
+#define ADP8860_INTR_EN 0x03 /* Interrupts enable */
+#define ADP8860_CFGR 0x04 /* Configuration register */
+#define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */
+#define ADP8860_BLOFF 0x06 /* Backlight off timeout */
+#define ADP8860_BLDIM 0x07 /* Backlight dim timeout */
+#define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */
+#define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */
+#define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */
+#define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */
+#define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */
+#define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */
+#define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */
+#define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */
+#define ADP8860_ISCC 0x10 /* Independent sink current control register */
+#define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */
+#define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */
+#define ADP8860_ISCF 0x13 /* Independent sink current fade register */
+#define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */
+#define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */
+#define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */
+#define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */
+#define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */
+#define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */
+#define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */
+#define ADP8860_CCFG 0x1B /* Comparator configuration */
+#define ADP8860_CCFG2 0x1C /* Second comparator configuration */
+#define ADP8860_L2_TRP 0x1D /* L2 comparator reference */
+#define ADP8860_L2_HYS 0x1E /* L2 hysteresis */
+#define ADP8860_L3_TRP 0x1F /* L3 comparator reference */
+#define ADP8860_L3_HYS 0x20 /* L3 hysteresis */
+#define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */
+#define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */
+#define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */
+#define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */
+
+#define ADP8860_MANUFID		0x0  /* Analog Devices ADP8860 Manufacturer ID */
+#define ADP8861_MANUFID		0x4  /* Analog Devices ADP8861 Manufacturer ID */
+#define ADP8863_MANUFID		0x2  /* Analog Devices ADP8863 Manufacturer ID */
+
+#define ADP8860_DEVID(x)	((x) & 0xF)
+#define ADP8860_MANID(x)	((x) >> 4)
+
+/* MDCR Device mode and status */
+#define INT_CFG			(1 << 6)
+#define NSTBY			(1 << 5)
+#define DIM_EN			(1 << 4)
+#define GDWN_DIS		(1 << 3)
+#define SIS_EN			(1 << 2)
+#define CMP_AUTOEN		(1 << 1)
+#define BLEN			(1 << 0)
+
+/* ADP8860_CCFG Main ALS comparator level enable */
+#define L3_EN			(1 << 1)
+#define L2_EN			(1 << 0)
+
+#define CFGR_BLV_SHIFT		3
+#define CFGR_BLV_MASK		0x3
+#define ADP8860_FLAG_LED_MASK	0xFF
+
+#define FADE_VAL(in, out)	((0xF & (in)) | ((0xF & (out)) << 4))
+#define BL_CFGR_VAL(law, blv)	((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1))
+#define ALS_CCFG_VAL(filt)	((0x7 & filt) << 5)
+
+enum {
+	adp8860,
+	adp8861,
+	adp8863
+};
+
+struct adp8860_led {
+	struct led_classdev	cdev;
+	struct work_struct	work;
+	struct i2c_client	*client;
+	enum led_brightness	new_brightness;
+	int			id;
+	int			flags;
+};
+
+struct adp8860_bl {
+	struct i2c_client *client;
+	struct backlight_device *bl;
+	struct adp8860_led *led;
+	struct adp8860_backlight_platform_data *pdata;
+	struct mutex lock;
+	unsigned long cached_daylight_max;
+	int id;
+	int revid;
+	int current_brightness;
+	unsigned en_ambl_sens:1;
+	unsigned gdwn_dis:1;
+};
+
+static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
+		return ret;
+	}
+
+	*val = (uint8_t)ret;
+	return 0;
+}
+
+static int adp8860_write(struct i2c_client *client, u8 reg, u8 val)
+{
+	return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
+{
+	struct adp8860_bl *data = i2c_get_clientdata(client);
+	uint8_t reg_val;
+	int ret;
+
+	mutex_lock(&data->lock);
+
+	ret = adp8860_read(client, reg, &reg_val);
+
+	if (!ret && ((reg_val & bit_mask) == 0)) {
+		reg_val |= bit_mask;
+		ret = adp8860_write(client, reg, reg_val);
+	}
+
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
+{
+	struct adp8860_bl *data = i2c_get_clientdata(client);
+	uint8_t reg_val;
+	int ret;
+
+	mutex_lock(&data->lock);
+
+	ret = adp8860_read(client, reg, &reg_val);
+
+	if (!ret && (reg_val & bit_mask)) {
+		reg_val &= ~bit_mask;
+		ret = adp8860_write(client, reg, reg_val);
+	}
+
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+/*
+ * Independent sink / LED
+ */
+#if defined(ADP8860_USE_LEDS)
+static void adp8860_led_work(struct work_struct *work)
+{
+	struct adp8860_led *led = container_of(work, struct adp8860_led, work);
+	adp8860_write(led->client, ADP8860_ISC1 - led->id + 1,
+			 led->new_brightness >> 1);
+}
+
+static void adp8860_led_set(struct led_classdev *led_cdev,
+			   enum led_brightness value)
+{
+	struct adp8860_led *led;
+
+	led = container_of(led_cdev, struct adp8860_led, cdev);
+	led->new_brightness = value;
+	schedule_work(&led->work);
+}
+
+static int adp8860_led_setup(struct adp8860_led *led)
+{
+	struct i2c_client *client = led->client;
+	int ret = 0;
+
+	ret = adp8860_write(client, ADP8860_ISC1 - led->id + 1, 0);
+	ret |= adp8860_set_bits(client, ADP8860_ISCC, 1 << (led->id - 1));
+
+	if (led->id > 4)
+		ret |= adp8860_set_bits(client, ADP8860_ISCT1,
+				(led->flags & 0x3) << ((led->id - 5) * 2));
+	else
+		ret |= adp8860_set_bits(client, ADP8860_ISCT2,
+				(led->flags & 0x3) << ((led->id - 1) * 2));
+
+	return ret;
+}
+
+static int __devinit adp8860_led_probe(struct i2c_client *client)
+{
+	struct adp8860_backlight_platform_data *pdata =
+		client->dev.platform_data;
+	struct adp8860_bl *data = i2c_get_clientdata(client);
+	struct adp8860_led *led, *led_dat;
+	struct led_info *cur_led;
+	int ret, i;
+
+	led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
+	if (led == NULL) {
+		dev_err(&client->dev, "failed to alloc memory\n");
+		return -ENOMEM;
+	}
+
+	ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law);
+	ret = adp8860_write(client, ADP8860_ISCT1,
+			(pdata->led_on_time & 0x3) << 6);
+	ret |= adp8860_write(client, ADP8860_ISCF,
+			FADE_VAL(pdata->led_fade_in, pdata->led_fade_out));
+
+	if (ret) {
+		dev_err(&client->dev, "failed to write\n");
+		goto err_free;
+	}
+
+	for (i = 0; i < pdata->num_leds; ++i) {
+		cur_led = &pdata->leds[i];
+		led_dat = &led[i];
+
+		led_dat->id = cur_led->flags & ADP8860_FLAG_LED_MASK;
+
+		if (led_dat->id > 7 || led_dat->id < 1) {
+			dev_err(&client->dev, "Invalid LED ID %d\n",
+				led_dat->id);
+			goto err;
+		}
+
+		if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) {
+			dev_err(&client->dev, "LED %d used by Backlight\n",
+				led_dat->id);
+			goto err;
+		}
+
+		led_dat->cdev.name = cur_led->name;
+		led_dat->cdev.default_trigger = cur_led->default_trigger;
+		led_dat->cdev.brightness_set = adp8860_led_set;
+		led_dat->cdev.brightness = LED_OFF;
+		led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT;
+		led_dat->client = client;
+		led_dat->new_brightness = LED_OFF;
+		INIT_WORK(&led_dat->work, adp8860_led_work);
+
+		ret = led_classdev_register(&client->dev, &led_dat->cdev);
+		if (ret) {
+			dev_err(&client->dev, "failed to register LED %d\n",
+				led_dat->id);
+			goto err;
+		}
+
+		ret = adp8860_led_setup(led_dat);
+		if (ret) {
+			dev_err(&client->dev, "failed to write\n");
+			i++;
+			goto err;
+		}
+	}
+
+	data->led = led;
+
+	return 0;
+
+ err:
+	for (i = i - 1; i >= 0; --i) {
+		led_classdev_unregister(&led[i].cdev);
+		cancel_work_sync(&led[i].work);
+	}
+
+ err_free:
+	kfree(led);
+
+	return ret;
+}
+
+static int __devexit adp8860_led_remove(struct i2c_client *client)
+{
+	struct adp8860_backlight_platform_data *pdata =
+		client->dev.platform_data;
+	struct adp8860_bl *data = i2c_get_clientdata(client);
+	int i;
+
+	for (i = 0; i < pdata->num_leds; i++) {
+		led_classdev_unregister(&data->led[i].cdev);
+		cancel_work_sync(&data->led[i].work);
+	}
+
+	kfree(data->led);
+	return 0;
+}
+#else
+static int __devinit adp8860_led_probe(struct i2c_client *client)
+{
+	return 0;
+}
+
+static int __devexit adp8860_led_remove(struct i2c_client *client)
+{
+	return 0;
+}
+#endif
+
+static int adp8860_bl_set(struct backlight_device *bl, int brightness)
+{
+	struct adp8860_bl *data = bl_get_data(bl);
+	struct i2c_client *client = data->client;
+	int ret = 0;
+
+	if (data->en_ambl_sens) {
+		if ((brightness > 0) && (brightness < ADP8860_MAX_BRIGHTNESS)) {
+			/* Disable Ambient Light auto adjust */
+			ret |= adp8860_clr_bits(client, ADP8860_MDCR,
+					CMP_AUTOEN);
+			ret |= adp8860_write(client, ADP8860_BLMX1, brightness);
+		} else {
+			/*
+			 * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
+			 * restore daylight l1 sysfs brightness
+			 */
+			ret |= adp8860_write(client, ADP8860_BLMX1,
+					 data->cached_daylight_max);
+			ret |= adp8860_set_bits(client, ADP8860_MDCR,
+					 CMP_AUTOEN);
+		}
+	} else
+		ret |= adp8860_write(client, ADP8860_BLMX1, brightness);
+
+	if (data->current_brightness && brightness == 0)
+		ret |= adp8860_set_bits(client,
+				ADP8860_MDCR, DIM_EN);
+	else if (data->current_brightness == 0 && brightness)
+		ret |= adp8860_clr_bits(client,
+				ADP8860_MDCR, DIM_EN);
+
+	if (!ret)
+		data->current_brightness = brightness;
+
+	return ret;
+}
+
+static int adp8860_bl_update_status(struct backlight_device *bl)
+{
+	int brightness = bl->props.brightness;
+	if (bl->props.power != FB_BLANK_UNBLANK)
+		brightness = 0;
+
+	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+		brightness = 0;
+
+	return adp8860_bl_set(bl, brightness);
+}
+
+static int adp8860_bl_get_brightness(struct backlight_device *bl)
+{
+	struct adp8860_bl *data = bl_get_data(bl);
+
+	return data->current_brightness;
+}
+
+static const struct backlight_ops adp8860_bl_ops = {
+	.update_status	= adp8860_bl_update_status,
+	.get_brightness	= adp8860_bl_get_brightness,
+};
+
+static int adp8860_bl_setup(struct backlight_device *bl)
+{
+	struct adp8860_bl *data = bl_get_data(bl);
+	struct i2c_client *client = data->client;
+	struct adp8860_backlight_platform_data *pdata = data->pdata;
+	int ret = 0;
+
+	ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign);
+	ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max);
+	ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim);
+
+	if (data->en_ambl_sens) {
+		data->cached_daylight_max = pdata->l1_daylight_max;
+		ret |= adp8860_write(client, ADP8860_BLMX2,
+						pdata->l2_office_max);
+		ret |= adp8860_write(client, ADP8860_BLDM2,
+						pdata->l2_office_dim);
+		ret |= adp8860_write(client, ADP8860_BLMX3,
+						pdata->l3_dark_max);
+		ret |= adp8860_write(client, ADP8860_BLDM3,
+						pdata->l3_dark_dim);
+
+		ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip);
+		ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst);
+		ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip);
+		ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst);
+		ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN |
+						ALS_CCFG_VAL(pdata->abml_filt));
+	}
+
+	ret |= adp8860_write(client, ADP8860_CFGR,
+			BL_CFGR_VAL(pdata->bl_fade_law, 0));
+
+	ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in,
+			pdata->bl_fade_out));
+
+	ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY |
+			(data->gdwn_dis ? GDWN_DIS : 0));
+
+	return ret;
+}
+
+static ssize_t adp8860_show(struct device *dev, char *buf, int reg)
+{
+	struct adp8860_bl *data = dev_get_drvdata(dev);
+	int error;
+	uint8_t reg_val;
+
+	mutex_lock(&data->lock);
+	error = adp8860_read(data->client, reg, &reg_val);
+	mutex_unlock(&data->lock);
+
+	if (error < 0)
+		return error;
+
+	return sprintf(buf, "%u\n", reg_val);
+}
+
+static ssize_t adp8860_store(struct device *dev, const char *buf,
+			 size_t count, int reg)
+{
+	struct adp8860_bl *data = dev_get_drvdata(dev);
+	unsigned long val;
+	int ret;
+
+	ret = strict_strtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	mutex_lock(&data->lock);
+	adp8860_write(data->client, reg, val);
+	mutex_unlock(&data->lock);
+
+	return count;
+}
+
+static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	return adp8860_show(dev, buf, ADP8860_BLMX3);
+}
+
+static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	return adp8860_store(dev, buf, count, ADP8860_BLMX3);
+}
+
+static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show,
+			adp8860_bl_l3_dark_max_store);
+
+static ssize_t adp8860_bl_l2_office_max_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return adp8860_show(dev, buf, ADP8860_BLMX2);
+}
+
+static ssize_t adp8860_bl_l2_office_max_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	return adp8860_store(dev, buf, count, ADP8860_BLMX2);
+}
+static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show,
+			adp8860_bl_l2_office_max_store);
+
+static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	return adp8860_show(dev, buf, ADP8860_BLMX1);
+}
+
+static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct adp8860_bl *data = dev_get_drvdata(dev);
+
+	strict_strtoul(buf, 10, &data->cached_daylight_max);
+	return adp8860_store(dev, buf, count, ADP8860_BLMX1);
+}
+static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show,
+			adp8860_bl_l1_daylight_max_store);
+
+static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	return adp8860_show(dev, buf, ADP8860_BLDM3);
+}
+
+static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	return adp8860_store(dev, buf, count, ADP8860_BLDM3);
+}
+static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show,
+			adp8860_bl_l3_dark_dim_store);
+
+static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	return adp8860_show(dev, buf, ADP8860_BLDM2);
+}
+
+static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	return adp8860_store(dev, buf, count, ADP8860_BLDM2);
+}
+static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show,
+			adp8860_bl_l2_office_dim_store);
+
+static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	return adp8860_show(dev, buf, ADP8860_BLDM1);
+}
+
+static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	return adp8860_store(dev, buf, count, ADP8860_BLDM1);
+}
+static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show,
+			adp8860_bl_l1_daylight_dim_store);
+
+#ifdef ADP8860_EXT_FEATURES
+static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct adp8860_bl *data = dev_get_drvdata(dev);
+	int error;
+	uint8_t reg_val;
+	uint16_t ret_val;
+
+	mutex_lock(&data->lock);
+	error = adp8860_read(data->client, ADP8860_PH1LEVL, &reg_val);
+	ret_val = reg_val;
+	error |= adp8860_read(data->client, ADP8860_PH1LEVH, &reg_val);
+	mutex_unlock(&data->lock);
+
+	if (error < 0)
+		return error;
+
+	/* Return 13-bit conversion value for the first light sensor */
+	ret_val += (reg_val & 0x1F) << 8;
+
+	return sprintf(buf, "%u\n", ret_val);
+}
+static DEVICE_ATTR(ambient_light_level, 0444,
+		adp8860_bl_ambient_light_level_show, NULL);
+
+static ssize_t adp8860_bl_ambient_light_zone_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct adp8860_bl *data = dev_get_drvdata(dev);
+	int error;
+	uint8_t reg_val;
+
+	mutex_lock(&data->lock);
+	error = adp8860_read(data->client, ADP8860_CFGR, &reg_val);
+	mutex_unlock(&data->lock);
+
+	if (error < 0)
+		return error;
+
+	return sprintf(buf, "%u\n",
+		((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1);
+}
+
+static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct adp8860_bl *data = dev_get_drvdata(dev);
+	unsigned long val;
+	uint8_t reg_val;
+	int ret;
+
+	ret = strict_strtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	if (val == 0) {
+		/* Enable automatic ambient light sensing */
+		adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN);
+	} else if ((val > 0) && (val < 6)) {
+		/* Disable automatic ambient light sensing */
+		adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN);
+
+		/* Set user supplied ambient light zone */
+		mutex_lock(&data->lock);
+		adp8860_read(data->client, ADP8860_CFGR, &reg_val);
+		reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
+		reg_val |= val << CFGR_BLV_SHIFT;
+		adp8860_write(data->client, ADP8860_CFGR, reg_val);
+		mutex_unlock(&data->lock);
+	}
+
+	return count;
+}
+static DEVICE_ATTR(ambient_light_zone, 0664,
+		adp8860_bl_ambient_light_zone_show,
+		adp8860_bl_ambient_light_zone_store);
+#endif
+
+static struct attribute *adp8860_bl_attributes[] = {
+	&dev_attr_l3_dark_max.attr,
+	&dev_attr_l3_dark_dim.attr,
+	&dev_attr_l2_office_max.attr,
+	&dev_attr_l2_office_dim.attr,
+	&dev_attr_l1_daylight_max.attr,
+	&dev_attr_l1_daylight_dim.attr,
+#ifdef ADP8860_EXT_FEATURES
+	&dev_attr_ambient_light_level.attr,
+	&dev_attr_ambient_light_zone.attr,
+#endif
+	NULL
+};
+
+static const struct attribute_group adp8860_bl_attr_group = {
+	.attrs = adp8860_bl_attributes,
+};
+
+static int __devinit adp8860_probe(struct i2c_client *client,
+					const struct i2c_device_id *id)
+{
+	struct backlight_device *bl;
+	struct adp8860_bl *data;
+	struct adp8860_backlight_platform_data *pdata =
+		client->dev.platform_data;
+	struct backlight_properties props;
+	uint8_t reg_val;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter,
+					I2C_FUNC_SMBUS_BYTE_DATA)) {
+		dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+		return -EIO;
+	}
+
+	if (!pdata) {
+		dev_err(&client->dev, "no platform data?\n");
+		return -EINVAL;
+	}
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (data == NULL)
+		return -ENOMEM;
+
+	ret = adp8860_read(client, ADP8860_MFDVID, &reg_val);
+	if (ret < 0)
+		goto out2;
+
+	switch (ADP8860_MANID(reg_val)) {
+	case ADP8863_MANUFID:
+		data->gdwn_dis = !!pdata->gdwn_dis;
+	case ADP8860_MANUFID:
+		data->en_ambl_sens = !!pdata->en_ambl_sens;
+		break;
+	case ADP8861_MANUFID:
+		data->gdwn_dis = !!pdata->gdwn_dis;
+		break;
+	default:
+		dev_err(&client->dev, "failed to probe\n");
+		ret = -ENODEV;
+		goto out2;
+	}
+
+	/* It's confirmed that the DEVID field is actually a REVID */
+
+	data->revid = ADP8860_DEVID(reg_val);
+	data->client = client;
+	data->pdata = pdata;
+	data->id = id->driver_data;
+	data->current_brightness = 0;
+	i2c_set_clientdata(client, data);
+
+	memset(&props, 0, sizeof(props));
+	props.max_brightness = ADP8860_MAX_BRIGHTNESS;
+
+	mutex_init(&data->lock);
+
+	bl = backlight_device_register(dev_driver_string(&client->dev),
+			&client->dev, data, &adp8860_bl_ops, &props);
+	if (IS_ERR(bl)) {
+		dev_err(&client->dev, "failed to register backlight\n");
+		ret = PTR_ERR(bl);
+		goto out2;
+	}
+
+	bl->props.max_brightness =
+		bl->props.brightness = ADP8860_MAX_BRIGHTNESS;
+
+	data->bl = bl;
+
+	if (data->en_ambl_sens)
+		ret = sysfs_create_group(&bl->dev.kobj,
+			&adp8860_bl_attr_group);
+
+	if (ret) {
+		dev_err(&client->dev, "failed to register sysfs\n");
+		goto out1;
+	}
+
+	ret = adp8860_bl_setup(bl);
+	if (ret) {
+		ret = -EIO;
+		goto out;
+	}
+
+	backlight_update_status(bl);
+
+	dev_info(&client->dev, "%s Rev.%d Backlight\n",
+		client->name, data->revid);
+
+	if (pdata->num_leds)
+		adp8860_led_probe(client);
+
+	return 0;
+
+out:
+	if (data->en_ambl_sens)
+		sysfs_remove_group(&data->bl->dev.kobj,
+			&adp8860_bl_attr_group);
+out1:
+	backlight_device_unregister(bl);
+out2:
+	i2c_set_clientdata(client, NULL);
+	kfree(data);
+
+	return ret;
+}
+
+static int __devexit adp8860_remove(struct i2c_client *client)
+{
+	struct adp8860_bl *data = i2c_get_clientdata(client);
+
+	adp8860_clr_bits(client, ADP8860_MDCR, NSTBY);
+
+	if (data->led)
+		adp8860_led_remove(client);
+
+	if (data->en_ambl_sens)
+		sysfs_remove_group(&data->bl->dev.kobj,
+			&adp8860_bl_attr_group);
+
+	backlight_device_unregister(data->bl);
+	i2c_set_clientdata(client, NULL);
+	kfree(data);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message)
+{
+	adp8860_clr_bits(client, ADP8860_MDCR, NSTBY);
+
+	return 0;
+}
+
+static int adp8860_i2c_resume(struct i2c_client *client)
+{
+	adp8860_set_bits(client, ADP8860_MDCR, NSTBY);
+
+	return 0;
+}
+#else
+#define adp8860_i2c_suspend NULL
+#define adp8860_i2c_resume NULL
+#endif
+
+static const struct i2c_device_id adp8860_id[] = {
+	{ "adp8860", adp8860 },
+	{ "adp8861", adp8861 },
+	{ "adp8863", adp8863 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, adp8860_id);
+
+static struct i2c_driver adp8860_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+	},
+	.probe    = adp8860_probe,
+	.remove   = __devexit_p(adp8860_remove),
+	.suspend = adp8860_i2c_suspend,
+	.resume  = adp8860_i2c_resume,
+	.id_table = adp8860_id,
+};
+
+static int __init adp8860_init(void)
+{
+	return i2c_add_driver(&adp8860_driver);
+}
+module_init(adp8860_init);
+
+static void __exit adp8860_exit(void)
+{
+	i2c_del_driver(&adp8860_driver);
+}
+module_exit(adp8860_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Michael Hennerich <[e-mail]>");
+MODULE_DESCRIPTION("ADP8860 Backlight driver");
+MODULE_ALIAS("i2c:adp8860-backlight");

drivers/video/backlight/adx_bl.c

···
 	props.max_brightness = 0xff;
 	bldev = backlight_device_register(dev_name(&pdev->dev), &pdev->dev,
 					  bl, &adx_backlight_ops, &props);
-	if (!bldev) {
-		ret = -ENOMEM;
+	if (IS_ERR(bldev)) {
+		ret = PTR_ERR(bldev);
 		goto out;
 	}
 

drivers/video/backlight/ep93xx_bl.c

···
+/*
+ * Driver for the Cirrus EP93xx lcd backlight
+ *
+ * Copyright (c) 2010 H Hartley Sweeten <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver controls the pulse width modulated brightness control output,
+ * BRIGHT, on the Cirrus EP9307, EP9312, and EP9315 processors.
+ */
+
+
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+
+#include <mach/hardware.h>
+
+#define EP93XX_RASTER_REG(x)		(EP93XX_RASTER_BASE + (x))
+#define EP93XX_RASTER_BRIGHTNESS	EP93XX_RASTER_REG(0x20)
+
+#define EP93XX_MAX_COUNT		255
+#define EP93XX_MAX_BRIGHT		255
+#define EP93XX_DEF_BRIGHT		128
+
+struct ep93xxbl {
+	void __iomem *mmio;
+	int brightness;
+};
+
+static int ep93xxbl_set(struct backlight_device *bl, int brightness)
+{
+	struct ep93xxbl *ep93xxbl = bl_get_data(bl);
+
+	__raw_writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio);
+
+	ep93xxbl->brightness = brightness;
+
+	return 0;
+}
+
+static int ep93xxbl_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;
+
+	return ep93xxbl_set(bl, brightness);
+}
+
+static int ep93xxbl_get_brightness(struct backlight_device *bl)
+{
+	struct ep93xxbl *ep93xxbl = bl_get_data(bl);
+
+	return ep93xxbl->brightness;
+}
+
+static const struct backlight_ops ep93xxbl_ops = {
+	.update_status	= ep93xxbl_update_status,
+	.get_brightness	= ep93xxbl_get_brightness,
+};
+
+static int __init ep93xxbl_probe(struct platform_device *dev)
+{
+	struct ep93xxbl *ep93xxbl;
+	struct backlight_device *bl;
+	struct backlight_properties props;
+
+	ep93xxbl = devm_kzalloc(&dev->dev, sizeof(*ep93xxbl), GFP_KERNEL);
+	if (!ep93xxbl)
+		return -ENOMEM;
+
+	/*
+	 * This register is located in the range already ioremap'ed by
+	 * the framebuffer driver.  A MFD driver seems a bit of overkill
+	 * to handle this so use the static I/O mapping; this address
+	 * is already virtual.
+	 *
+	 * NOTE: No locking is required; the framebuffer does not touch
+	 * this register.
+	 */
+	ep93xxbl->mmio = EP93XX_RASTER_BRIGHTNESS;
+
+	memset(&props, 0, sizeof(struct backlight_properties));
+	props.max_brightness = EP93XX_MAX_BRIGHT;
+	bl = backlight_device_register(dev->name, &dev->dev, ep93xxbl,
+				       &ep93xxbl_ops, &props);
+	if (IS_ERR(bl))
+		return PTR_ERR(bl);
+
+	bl->props.brightness = EP93XX_DEF_BRIGHT;
+
+	platform_set_drvdata(dev, bl);
+
+	ep93xxbl_update_status(bl);
+
+	return 0;
+}
+
+static int ep93xxbl_remove(struct platform_device *dev)
+{
+	struct backlight_device *bl = platform_get_drvdata(dev);
+
+	backlight_device_unregister(bl);
+	platform_set_drvdata(dev, NULL);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int ep93xxbl_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct backlight_device *bl = platform_get_drvdata(dev);
+
+	return ep93xxbl_set(bl, 0);
+}
+
+static int ep93xxbl_resume(struct platform_device *dev)
+{
+	struct backlight_device *bl = platform_get_drvdata(dev);
+
+	backlight_update_status(bl);
+	return 0;
+}
+#else
+#define ep93xxbl_suspend	NULL
+#define ep93xxbl_resume		NULL
+#endif
+
+static struct platform_driver ep93xxbl_driver = {
+	.driver		= {
+		.name	= "ep93xx-bl",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ep93xxbl_probe,
+	.remove		= __devexit_p(ep93xxbl_remove),
+	.suspend	= ep93xxbl_suspend,
+	.resume		= ep93xxbl_resume,
+};
+
+static int __init ep93xxbl_init(void)
+{
+	return platform_driver_register(&ep93xxbl_driver);
+}
+module_init(ep93xxbl_init);
+
+static void __exit ep93xxbl_exit(void)
+{
+	platform_driver_unregister(&ep93xxbl_driver);
+}
+module_exit(ep93xxbl_exit);
+
+MODULE_DESCRIPTION("EP93xx Backlight Driver");
+MODULE_AUTHOR("H Hartley Sweeten <[e-mail]>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ep93xx-bl");

drivers/video/backlight/l4f00242t03.c

···
 
 	if (priv == NULL) {
 		dev_err(&spi->dev, "No memory for this device.\n");
-		ret = -ENOMEM;
-		goto err;
+		return -ENOMEM;
 	}
 
 	dev_set_drvdata(&spi->dev, priv);
···
 	if (ret) {
 		dev_err(&spi->dev,
 			"Unable to get the lcd l4f00242t03 reset gpio.\n");
-		return ret;
+		goto err;
 	}
 
 	ret = gpio_direction_output(pdata->reset_gpio, 1);
···
 	if (ret) {
 		dev_err(&spi->dev,
 			"Unable to get the lcd l4f00242t03 data en gpio.\n");
-		return ret;
+		goto err2;
 	}
 
 	ret = gpio_direction_output(pdata->data_enable_gpio, 0);
···
 	gpio_free(pdata->reset_gpio);
 
 	if (priv->io_reg)
-		regulator_put(priv->core_reg);
-	if (priv->core_reg)
 		regulator_put(priv->io_reg);
+	if (priv->core_reg)
+		regulator_put(priv->core_reg);
 
 	kfree(priv);
 

drivers/video/backlight/max8925_bl.c

···
 	backlight_update_status(bl);
 	return 0;
 out:
+	backlight_device_unregister(bl);
 	kfree(data);
 	return ret;
 }

drivers/video/backlight/mbp_nvidia_bl.c

···
 		.callback	= mbp_dmi_match,
 		.ident		= "MacBook 1,1",
 		.matches	= {
-			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
 		},
 		.driver_data	= (void *)&intel_chipset_data,
···
 		.matches	= {
 			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "MacBook4,2"),
+		},
+		.driver_data	= (void *)&intel_chipset_data,
+	},
+	{
+		.callback	= mbp_dmi_match,
+		.ident		= "MacBookPro 1,1",
+		.matches	= {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro1,1"),
+		},
+		.driver_data	= (void *)&intel_chipset_data,
+	},
+	{
+		.callback	= mbp_dmi_match,
+		.ident		= "MacBookPro 1,2",
+		.matches	= {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro1,2"),
+		},
+		.driver_data	= (void *)&intel_chipset_data,
+	},
+	{
+		.callback	= mbp_dmi_match,
+		.ident		= "MacBookPro 2,1",
+		.matches	= {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,1"),
+		},
+		.driver_data	= (void *)&intel_chipset_data,
+	},
+	{
+		.callback	= mbp_dmi_match,
+		.ident		= "MacBookPro 2,2",
+		.matches	= {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,2"),
 		},
 		.driver_data	= (void *)&intel_chipset_data,
 	},
···
 		.matches	= {
 			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,2"),
+		},
+		.driver_data	= (void *)&nvidia_chipset_data,
+	},
+	{
+		.callback	= mbp_dmi_match,
+		.ident		= "MacBook 6,1",
+		.matches	= {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBook6,1"),
 		},
 		.driver_data	= (void *)&nvidia_chipset_data,
 	},

drivers/video/backlight/pcf50633-backlight.c

···
+/*
+ *  Copyright (C) 2009-2010, Lars-Peter Clausen <[e-mail]>
+ *      PCF50633 backlight device driver
+ *
+ *  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/module.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+
+#include <linux/backlight.h>
+#include <linux/fb.h>
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/mfd/pcf50633/backlight.h>
+
+struct pcf50633_bl {
+	struct pcf50633 *pcf;
+	struct backlight_device *bl;
+
+	unsigned int brightness;
+	unsigned int brightness_limit;
+};
+
+/*
+ * pcf50633_bl_set_brightness_limit
+ *
+ * Update the brightness limit for the pc50633 backlight. The actual brightness
+ * will not go above the limit. This is useful to limit power drain for example
+ * on low battery.
+ *
+ * @dev: Pointer to a pcf50633 device
+ * @limit: The brightness limit. Valid values are 0-63
+ */
+int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit)
+{
+	struct pcf50633_bl *pcf_bl = platform_get_drvdata(pcf->bl_pdev);
+
+	if (!pcf_bl)
+		return -ENODEV;
+
+	pcf_bl->brightness_limit = limit & 0x3f;
+	backlight_update_status(pcf_bl->bl);
+
+    return 0;
+}
+
+static int pcf50633_bl_update_status(struct backlight_device *bl)
+{
+	struct pcf50633_bl *pcf_bl = bl_get_data(bl);
+	unsigned int new_brightness;
+
+
+	if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK) ||
+		bl->props.power != FB_BLANK_UNBLANK)
+		new_brightness = 0;
+	else if (bl->props.brightness < pcf_bl->brightness_limit)
+		new_brightness = bl->props.brightness;
+	else
+		new_brightness = pcf_bl->brightness_limit;
+
+
+	if (pcf_bl->brightness == new_brightness)
+		return 0;
+
+	if (new_brightness) {
+		pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDOUT,
+					new_brightness);
+		if (!pcf_bl->brightness)
+			pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 1);
+	} else {
+		pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 0);
+	}
+
+	pcf_bl->brightness = new_brightness;
+
+	return 0;
+}
+
+static int pcf50633_bl_get_brightness(struct backlight_device *bl)
+{
+	struct pcf50633_bl *pcf_bl = bl_get_data(bl);
+	return pcf_bl->brightness;
+}
+
+static const struct backlight_ops pcf50633_bl_ops = {
+	.get_brightness = pcf50633_bl_get_brightness,
+	.update_status	= pcf50633_bl_update_status,
+	.options	= BL_CORE_SUSPENDRESUME,
+};
+
+static int __devinit pcf50633_bl_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct pcf50633_bl *pcf_bl;
+	struct device *parent = pdev->dev.parent;
+	struct pcf50633_platform_data *pcf50633_data = parent->platform_data;
+	struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data;
+	struct backlight_properties bl_props;
+
+	pcf_bl = kzalloc(sizeof(*pcf_bl), GFP_KERNEL);
+	if (!pcf_bl)
+		return -ENOMEM;
+
+	bl_props.max_brightness = 0x3f;
+	bl_props.power = FB_BLANK_UNBLANK;
+
+	if (pdata) {
+		bl_props.brightness = pdata->default_brightness;
+		pcf_bl->brightness_limit = pdata->default_brightness_limit;
+	} else {
+		bl_props.brightness = 0x3f;
+		pcf_bl->brightness_limit = 0x3f;
+	}
+
+	pcf_bl->pcf = dev_to_pcf50633(pdev->dev.parent);
+
+	pcf_bl->bl = backlight_device_register(pdev->name, &pdev->dev, pcf_bl,
+						&pcf50633_bl_ops, &bl_props);
+
+	if (IS_ERR(pcf_bl->bl)) {
+		ret = PTR_ERR(pcf_bl->bl);
+		goto err_free;
+	}
+
+	platform_set_drvdata(pdev, pcf_bl);
+
+	pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time);
+
+	/* Should be different from bl_props.brightness, so we do not exit
+	 * update_status early the first time it's called */
+	pcf_bl->brightness = pcf_bl->bl->props.brightness + 1;
+
+	backlight_update_status(pcf_bl->bl);
+
+	return 0;
+
+err_free:
+	kfree(pcf_bl);
+
+	return ret;
+}
+
+static int __devexit pcf50633_bl_remove(struct platform_device *pdev)
+{
+	struct pcf50633_bl *pcf_bl = platform_get_drvdata(pdev);
+
+	backlight_device_unregister(pcf_bl->bl);
+
+	platform_set_drvdata(pdev, NULL);
+
+	kfree(pcf_bl);
+
+	return 0;
+}
+
+static struct platform_driver pcf50633_bl_driver = {
+	.probe =	pcf50633_bl_probe,
+	.remove =	__devexit_p(pcf50633_bl_remove),
+	.driver = {
+		.name = "pcf50633-backlight",
+	},
+};
+
+static int __init pcf50633_bl_init(void)
+{
+	return platform_driver_register(&pcf50633_bl_driver);
+}
+module_init(pcf50633_bl_init);
+
+static void __exit pcf50633_bl_exit(void)
+{
+	platform_driver_unregister(&pcf50633_bl_driver);
+}
+module_exit(pcf50633_bl_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <[e-mail]>");
+MODULE_DESCRIPTION("PCF50633 backlight driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50633-backlight");

drivers/video/backlight/s6e63m0.c

···
+/*
+ * S6E63M0 AMOLED LCD panel driver.
+ *
+ * Author: InKi Dae  <[e-mail]>
+ *
+ * Derived from drivers/video/omap/lcd-apollon.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/wait.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/lcd.h>
+#include <linux/backlight.h>
+
+#include "s6e63m0_gamma.h"
+
+#define SLEEPMSEC		0x1000
+#define ENDDEF			0x2000
+#define	DEFMASK			0xFF00
+#define COMMAND_ONLY		0xFE
+#define DATA_ONLY		0xFF
+
+#define MIN_BRIGHTNESS		0
+#define MAX_BRIGHTNESS		10
+
+#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
+
+struct s6e63m0 {
+	struct device			*dev;
+	struct spi_device		*spi;
+	unsigned int			power;
+	unsigned int			current_brightness;
+	unsigned int			gamma_mode;
+	unsigned int			gamma_table_count;
+	struct lcd_device		*ld;
+	struct backlight_device		*bd;
+	struct lcd_platform_data	*lcd_pd;
+};
+
+static const unsigned short SEQ_PANEL_CONDITION_SET[] = {
+	0xF8, 0x01,
+	DATA_ONLY, 0x27,
+	DATA_ONLY, 0x27,
+	DATA_ONLY, 0x07,
+	DATA_ONLY, 0x07,
+	DATA_ONLY, 0x54,
+	DATA_ONLY, 0x9f,
+	DATA_ONLY, 0x63,
+	DATA_ONLY, 0x86,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x33,
+	DATA_ONLY, 0x0d,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_DISPLAY_CONDITION_SET[] = {
+	0xf2, 0x02,
+	DATA_ONLY, 0x03,
+	DATA_ONLY, 0x1c,
+	DATA_ONLY, 0x10,
+	DATA_ONLY, 0x10,
+
+	0xf7, 0x03,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_GAMMA_SETTING[] = {
+	0xfa, 0x00,
+	DATA_ONLY, 0x18,
+	DATA_ONLY, 0x08,
+	DATA_ONLY, 0x24,
+	DATA_ONLY, 0x64,
+	DATA_ONLY, 0x56,
+	DATA_ONLY, 0x33,
+	DATA_ONLY, 0xb6,
+	DATA_ONLY, 0xba,
+	DATA_ONLY, 0xa8,
+	DATA_ONLY, 0xac,
+	DATA_ONLY, 0xb1,
+	DATA_ONLY, 0x9d,
+	DATA_ONLY, 0xc1,
+	DATA_ONLY, 0xc1,
+	DATA_ONLY, 0xb7,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x9c,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x9f,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0xd6,
+
+	0xfa, 0x01,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_ETC_CONDITION_SET[] = {
+	0xf6, 0x00,
+	DATA_ONLY, 0x8c,
+	DATA_ONLY, 0x07,
+
+	0xb3, 0xc,
+
+	0xb5, 0x2c,
+	DATA_ONLY, 0x12,
+	DATA_ONLY, 0x0c,
+	DATA_ONLY, 0x0a,
+	DATA_ONLY, 0x10,
+	DATA_ONLY, 0x0e,
+	DATA_ONLY, 0x17,
+	DATA_ONLY, 0x13,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x2a,
+	DATA_ONLY, 0x24,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x1b,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x17,
+
+	DATA_ONLY, 0x2b,
+	DATA_ONLY, 0x26,
+	DATA_ONLY, 0x22,
+	DATA_ONLY, 0x20,
+	DATA_ONLY, 0x3a,
+	DATA_ONLY, 0x34,
+	DATA_ONLY, 0x30,
+	DATA_ONLY, 0x2c,
+	DATA_ONLY, 0x29,
+	DATA_ONLY, 0x26,
+	DATA_ONLY, 0x25,
+	DATA_ONLY, 0x23,
+	DATA_ONLY, 0x21,
+	DATA_ONLY, 0x20,
+	DATA_ONLY, 0x1e,
+	DATA_ONLY, 0x1e,
+
+	0xb6, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x11,
+	DATA_ONLY, 0x22,
+	DATA_ONLY, 0x33,
+	DATA_ONLY, 0x44,
+	DATA_ONLY, 0x44,
+	DATA_ONLY, 0x44,
+
+	DATA_ONLY, 0x55,
+	DATA_ONLY, 0x55,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+
+	0xb7, 0x2c,
+	DATA_ONLY, 0x12,
+	DATA_ONLY, 0x0c,
+	DATA_ONLY, 0x0a,
+	DATA_ONLY, 0x10,
+	DATA_ONLY, 0x0e,
+	DATA_ONLY, 0x17,
+	DATA_ONLY, 0x13,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x2a,
+	DATA_ONLY, 0x24,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x1b,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x17,
+
+	DATA_ONLY, 0x2b,
+	DATA_ONLY, 0x26,
+	DATA_ONLY, 0x22,
+	DATA_ONLY, 0x20,
+	DATA_ONLY, 0x3a,
+	DATA_ONLY, 0x34,
+	DATA_ONLY, 0x30,
+	DATA_ONLY, 0x2c,
+	DATA_ONLY, 0x29,
+	DATA_ONLY, 0x26,
+	DATA_ONLY, 0x25,
+	DATA_ONLY, 0x23,
+	DATA_ONLY, 0x21,
+	DATA_ONLY, 0x20,
+	DATA_ONLY, 0x1e,
+	DATA_ONLY, 0x1e,
+
+	0xb8, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x11,
+	DATA_ONLY, 0x22,
+	DATA_ONLY, 0x33,
+	DATA_ONLY, 0x44,
+	DATA_ONLY, 0x44,
+	DATA_ONLY, 0x44,
+
+	DATA_ONLY, 0x55,
+	DATA_ONLY, 0x55,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+
+	0xb9, 0x2c,
+	DATA_ONLY, 0x12,
+	DATA_ONLY, 0x0c,
+	DATA_ONLY, 0x0a,
+	DATA_ONLY, 0x10,
+	DATA_ONLY, 0x0e,
+	DATA_ONLY, 0x17,
+	DATA_ONLY, 0x13,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x2a,
+	DATA_ONLY, 0x24,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x1b,
+	DATA_ONLY, 0x1a,
+	DATA_ONLY, 0x17,
+
+	DATA_ONLY, 0x2b,
+	DATA_ONLY, 0x26,
+	DATA_ONLY, 0x22,
+	DATA_ONLY, 0x20,
+	DATA_ONLY, 0x3a,
+	DATA_ONLY, 0x34,
+	DATA_ONLY, 0x30,
+	DATA_ONLY, 0x2c,
+	DATA_ONLY, 0x29,
+	DATA_ONLY, 0x26,
+	DATA_ONLY, 0x25,
+	DATA_ONLY, 0x23,
+	DATA_ONLY, 0x21,
+	DATA_ONLY, 0x20,
+	DATA_ONLY, 0x1e,
+	DATA_ONLY, 0x1e,
+
+	0xba, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x11,
+	DATA_ONLY, 0x22,
+	DATA_ONLY, 0x33,
+	DATA_ONLY, 0x44,
+	DATA_ONLY, 0x44,
+	DATA_ONLY, 0x44,
+
+	DATA_ONLY, 0x55,
+	DATA_ONLY, 0x55,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+	DATA_ONLY, 0x66,
+
+	0xc1, 0x4d,
+	DATA_ONLY, 0x96,
+	DATA_ONLY, 0x1d,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x01,
+	DATA_ONLY, 0xdf,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	DATA_ONLY, 0x1f,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	DATA_ONLY, 0x06,
+	DATA_ONLY, 0x09,
+	DATA_ONLY, 0x0d,
+	DATA_ONLY, 0x0f,
+	DATA_ONLY, 0x12,
+	DATA_ONLY, 0x15,
+	DATA_ONLY, 0x18,
+
+	0xb2, 0x10,
+	DATA_ONLY, 0x10,
+	DATA_ONLY, 0x0b,
+	DATA_ONLY, 0x05,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_ACL_ON[] = {
+	/* ACL on */
+	0xc0, 0x01,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_ACL_OFF[] = {
+	/* ACL off */
+	0xc0, 0x00,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_ELVSS_ON[] = {
+	/* ELVSS on */
+	0xb1, 0x0b,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_ELVSS_OFF[] = {
+	/* ELVSS off */
+	0xb1, 0x0a,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_STAND_BY_OFF[] = {
+	0x11, COMMAND_ONLY,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_STAND_BY_ON[] = {
+	0x10, COMMAND_ONLY,
+
+	ENDDEF, 0x0000
+};
+
+static const unsigned short SEQ_DISPLAY_ON[] = {
+	0x29, COMMAND_ONLY,
+
+	ENDDEF, 0x0000
+};
+
+
+static int s6e63m0_spi_write_byte(struct s6e63m0 *lcd, int addr, int data)
+{
+	u16 buf[1];
+	struct spi_message msg;
+
+	struct spi_transfer xfer = {
+		.len		= 2,
+		.tx_buf		= buf,
+	};
+
+	buf[0] = (addr << 8) | data;
+
+	spi_message_init(&msg);
+	spi_message_add_tail(&xfer, &msg);
+
+	return spi_sync(lcd->spi, &msg);
+}
+
+static int s6e63m0_spi_write(struct s6e63m0 *lcd, unsigned char address,
+	unsigned char command)
+{
+	int ret = 0;
+
+	if (address != DATA_ONLY)
+		ret = s6e63m0_spi_write_byte(lcd, 0x0, address);
+	if (command != COMMAND_ONLY)
+		ret = s6e63m0_spi_write_byte(lcd, 0x1, command);
+
+	return ret;
+}
+
+static int s6e63m0_panel_send_sequence(struct s6e63m0 *lcd,
+	const unsigned short *wbuf)
+{
+	int ret = 0, i = 0;
+
+	while ((wbuf[i] & DEFMASK) != ENDDEF) {
+		if ((wbuf[i] & DEFMASK) != SLEEPMSEC) {
+			ret = s6e63m0_spi_write(lcd, wbuf[i], wbuf[i+1]);
+			if (ret)
+				break;
+		} else
+			udelay(wbuf[i+1]*1000);
+		i += 2;
+	}
+
+	return ret;
+}
+
+static int _s6e63m0_gamma_ctl(struct s6e63m0 *lcd, const unsigned int *gamma)
+{
+	unsigned int i = 0;
+	int ret = 0;
+
+	/* disable gamma table updating. */
+	ret = s6e63m0_spi_write(lcd, 0xfa, 0x00);
+	if (ret) {
+		dev_err(lcd->dev, "failed to disable gamma table updating.\n");
+		goto gamma_err;
+	}
+
+	for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) {
+		ret = s6e63m0_spi_write(lcd, DATA_ONLY, gamma[i]);
+		if (ret) {
+			dev_err(lcd->dev, "failed to set gamma table.\n");
+			goto gamma_err;
+		}
+	}
+
+	/* update gamma table. */
+	ret = s6e63m0_spi_write(lcd, 0xfa, 0x01);
+	if (ret)
+		dev_err(lcd->dev, "failed to update gamma table.\n");
+
+gamma_err:
+	return ret;
+}
+
+static int s6e63m0_gamma_ctl(struct s6e63m0 *lcd, int gamma)
+{
+	int ret = 0;
+
+	ret = _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]);
+
+	return ret;
+}
+
+
+static int s6e63m0_ldi_init(struct s6e63m0 *lcd)
+{
+	int ret, i;
+	const unsigned short *init_seq[] = {
+		SEQ_PANEL_CONDITION_SET,
+		SEQ_DISPLAY_CONDITION_SET,
+		SEQ_GAMMA_SETTING,
+		SEQ_ETC_CONDITION_SET,
+		SEQ_ACL_ON,
+		SEQ_ELVSS_ON,
+	};
+
+	for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
+		ret = s6e63m0_panel_send_sequence(lcd, init_seq[i]);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int s6e63m0_ldi_enable(struct s6e63m0 *lcd)
+{
+	int ret = 0, i;
+	const unsigned short *enable_seq[] = {
+		SEQ_STAND_BY_OFF,
+		SEQ_DISPLAY_ON,
+	};
+
+	for (i = 0; i < ARRAY_SIZE(enable_seq); i++) {
+		ret = s6e63m0_panel_send_sequence(lcd, enable_seq[i]);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int s6e63m0_ldi_disable(struct s6e63m0 *lcd)
+{
+	int ret;
+
+	ret = s6e63m0_panel_send_sequence(lcd, SEQ_STAND_BY_ON);
+
+	return ret;
+}
+
+static int s6e63m0_power_on(struct s6e63m0 *lcd)
+{
+	int ret = 0;
+	struct lcd_platform_data *pd = NULL;
+	struct backlight_device *bd = NULL;
+
+	pd = lcd->lcd_pd;
+	if (!pd) {
+		dev_err(lcd->dev, "platform data is NULL.\n");
+		return -EFAULT;
+	}
+
+	bd = lcd->bd;
+	if (!bd) {
+		dev_err(lcd->dev, "backlight device is NULL.\n");
+		return -EFAULT;
+	}
+
+	if (!pd->power_on) {
+		dev_err(lcd->dev, "power_on is NULL.\n");
+		return -EFAULT;
+	} else {
+		pd->power_on(lcd->ld, 1);
+		mdelay(pd->power_on_delay);
+	}
+
+	if (!pd->reset) {
+		dev_err(lcd->dev, "reset is NULL.\n");
+		return -EFAULT;
+	} else {
+		pd->reset(lcd->ld);
+		mdelay(pd->reset_delay);
+	}
+
+	ret = s6e63m0_ldi_init(lcd);
+	if (ret) {
+		dev_err(lcd->dev, "failed to initialize ldi.\n");
+		return ret;
+	}
+
+	ret = s6e63m0_ldi_enable(lcd);
+	if (ret) {
+		dev_err(lcd->dev, "failed to enable ldi.\n");
+		return ret;
+	}
+
+	/* set brightness to current value after power on or resume. */
+	ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness);
+	if (ret) {
+		dev_err(lcd->dev, "lcd gamma setting failed.\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int s6e63m0_power_off(struct s6e63m0 *lcd)
+{
+	int ret = 0;
+	struct lcd_platform_data *pd = NULL;
+
+	pd = lcd->lcd_pd;
+	if (!pd) {
+		dev_err(lcd->dev, "platform data is NULL.\n");
+		return -EFAULT;
+	}
+
+	ret = s6e63m0_ldi_disable(lcd);
+	if (ret) {
+		dev_err(lcd->dev, "lcd setting failed.\n");
+		return -EIO;
+	}
+
+	mdelay(pd->power_off_delay);
+
+	if (!pd->power_on) {
+		dev_err(lcd->dev, "power_on is NULL.\n");
+		return -EFAULT;
+	} else
+		pd->power_on(lcd->ld, 0);
+
+	return 0;
+}
+
+static int s6e63m0_power(struct s6e63m0 *lcd, int power)
+{
+	int ret = 0;
+
+	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
+		ret = s6e63m0_power_on(lcd);
+	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
+		ret = s6e63m0_power_off(lcd);
+
+	if (!ret)
+		lcd->power = power;
+
+	return ret;
+}
+
+static int s6e63m0_set_power(struct lcd_device *ld, int power)
+{
+	struct s6e63m0 *lcd = lcd_get_data(ld);
+
+	if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
+		power != FB_BLANK_NORMAL) {
+		dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
+		return -EINVAL;
+	}
+
+	return s6e63m0_power(lcd, power);
+}
+
+static int s6e63m0_get_power(struct lcd_device *ld)
+{
+	struct s6e63m0 *lcd = lcd_get_data(ld);
+
+	return lcd->power;
+}
+
+static int s6e63m0_get_brightness(struct backlight_device *bd)
+{
+	return bd->props.brightness;
+}
+
+static int s6e63m0_set_brightness(struct backlight_device *bd)
+{
+	int ret = 0, brightness = bd->props.brightness;
+	struct s6e63m0 *lcd = bl_get_data(bd);
+
+	if (brightness < MIN_BRIGHTNESS ||
+		brightness > bd->props.max_brightness) {
+		dev_err(&bd->dev, "lcd brightness should be %d to %d.\n",
+			MIN_BRIGHTNESS, MAX_BRIGHTNESS);
+		return -EINVAL;
+	}
+
+	ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness);
+	if (ret) {
+		dev_err(&bd->dev, "lcd brightness setting failed.\n");
+		return -EIO;
+	}
+
+	return ret;
+}
+
+static struct lcd_ops s6e63m0_lcd_ops = {
+	.set_power = s6e63m0_set_power,
+	.get_power = s6e63m0_get_power,
+};
+
+static const struct backlight_ops s6e63m0_backlight_ops  = {
+	.get_brightness = s6e63m0_get_brightness,
+	.update_status = s6e63m0_set_brightness,
+};
+
+static ssize_t s6e63m0_sysfs_show_gamma_mode(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct s6e63m0 *lcd = dev_get_drvdata(dev);
+	char temp[10];
+
+	switch (lcd->gamma_mode) {
+	case 0:
+		sprintf(temp, "2.2 mode\n");
+		strcat(buf, temp);
+		break;
+	case 1:
+		sprintf(temp, "1.9 mode\n");
+		strcat(buf, temp);
+		break;
+	case 2:
+		sprintf(temp, "1.7 mode\n");
+		strcat(buf, temp);
+		break;
+	default:
+		dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7)n");
+		break;
+	}
+
+	return strlen(buf);
+}
+
+static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t len)
+{
+	struct s6e63m0 *lcd = dev_get_drvdata(dev);
+	struct backlight_device *bd = NULL;
+	int brightness, rc;
+
+	rc = strict_strtoul(buf, 0, (unsigned long *)&lcd->gamma_mode);
+	if (rc < 0)
+		return rc;
+
+	bd = lcd->bd;
+
+	brightness = bd->props.brightness;
+
+	switch (lcd->gamma_mode) {
+	case 0:
+		_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]);
+		break;
+	case 1:
+		_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_19_table[brightness]);
+		break;
+	case 2:
+		_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_17_table[brightness]);
+		break;
+	default:
+		dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7\n");
+		_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]);
+		break;
+	}
+	return len;
+}
+
+static DEVICE_ATTR(gamma_mode, 0644,
+		s6e63m0_sysfs_show_gamma_mode, s6e63m0_sysfs_store_gamma_mode);
+
+static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct s6e63m0 *lcd = dev_get_drvdata(dev);
+	char temp[3];
+
+	sprintf(temp, "%d\n", lcd->gamma_table_count);
+	strcpy(buf, temp);
+
+	return strlen(buf);
+}
+static DEVICE_ATTR(gamma_table, 0644,
+		s6e63m0_sysfs_show_gamma_table, NULL);
+
+static int __init s6e63m0_probe(struct spi_device *spi)
+{
+	int ret = 0;
+	struct s6e63m0 *lcd = NULL;
+	struct lcd_device *ld = NULL;
+	struct backlight_device *bd = NULL;
+
+	lcd = kzalloc(sizeof(struct s6e63m0), GFP_KERNEL);
+	if (!lcd)
+		return -ENOMEM;
+
+	/* s6e63m0 lcd panel uses 3-wire 9bits SPI Mode. */
+	spi->bits_per_word = 9;
+
+	ret = spi_setup(spi);
+	if (ret < 0) {
+		dev_err(&spi->dev, "spi setup failed.\n");
+		goto out_free_lcd;
+	}
+
+	lcd->spi = spi;
+	lcd->dev = &spi->dev;
+
+	lcd->lcd_pd = (struct lcd_platform_data *)spi->dev.platform_data;
+	if (!lcd->lcd_pd) {
+		dev_err(&spi->dev, "platform data is NULL.\n");
+		goto out_free_lcd;
+	}
+
+	ld = lcd_device_register("s6e63m0", &spi->dev, lcd, &s6e63m0_lcd_ops);
+	if (IS_ERR(ld)) {
+		ret = PTR_ERR(ld);
+		goto out_free_lcd;
+	}
+
+	lcd->ld = ld;
+
+	bd = backlight_device_register("s6e63m0bl-bl", &spi->dev, lcd,
+		&s6e63m0_backlight_ops, NULL);
+	if (IS_ERR(bd)) {
+		ret =  PTR_ERR(bd);
+		goto out_lcd_unregister;
+	}
+
+	bd->props.max_brightness = MAX_BRIGHTNESS;
+	bd->props.brightness = MAX_BRIGHTNESS;
+	lcd->bd = bd;
+
+	/*
+	 * it gets gamma table count available so it gets user
+	 * know that.
+	 */
+	lcd->gamma_table_count =
+	    sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int));
+
+	ret = device_create_file(&(spi->dev), &dev_attr_gamma_mode);
+	if (ret < 0)
+		dev_err(&(spi->dev), "failed to add sysfs entries\n");
+
+	ret = device_create_file(&(spi->dev), &dev_attr_gamma_table);
+	if (ret < 0)
+		dev_err(&(spi->dev), "failed to add sysfs entries\n");
+
+	/*
+	 * if lcd panel was on from bootloader like u-boot then
+	 * do not lcd on.
+	 */
+	if (!lcd->lcd_pd->lcd_enabled) {
+		/*
+		 * if lcd panel was off from bootloader then
+		 * current lcd status is powerdown and then
+		 * it enables lcd panel.
+		 */
+		lcd->power = FB_BLANK_POWERDOWN;
+
+		s6e63m0_power(lcd, FB_BLANK_UNBLANK);
+	} else
+		lcd->power = FB_BLANK_UNBLANK;
+
+	dev_set_drvdata(&spi->dev, lcd);
+
+	dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n");
+
+	return 0;
+
+out_lcd_unregister:
+	lcd_device_unregister(ld);
+out_free_lcd:
+	kfree(lcd);
+	return ret;
+}
+
+static int __devexit s6e63m0_remove(struct spi_device *spi)
+{
+	struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+
+	s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
+	lcd_device_unregister(lcd->ld);
+	kfree(lcd);
+
+	return 0;
+}
+
+#if defined(CONFIG_PM)
+unsigned int before_power;
+
+static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+	int ret = 0;
+	struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+
+	dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+
+	before_power = lcd->power;
+
+	/*
+	 * when lcd panel is suspend, lcd panel becomes off
+	 * regardless of status.
+	 */
+	ret = s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
+
+	return ret;
+}
+
+static int s6e63m0_resume(struct spi_device *spi)
+{
+	int ret = 0;
+	struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+
+	/*
+	 * after suspended, if lcd panel status is FB_BLANK_UNBLANK
+	 * (at that time, before_power is FB_BLANK_UNBLANK) then
+	 * it changes that status to FB_BLANK_POWERDOWN to get lcd on.
+	 */
+	if (before_power == FB_BLANK_UNBLANK)
+		lcd->power = FB_BLANK_POWERDOWN;
+
+	dev_dbg(&spi->dev, "before_power = %d\n", before_power);
+
+	ret = s6e63m0_power(lcd, before_power);
+
+	return ret;
+}
+#else
+#define s6e63m0_suspend		NULL
+#define s6e63m0_resume		NULL
+#endif
+
+/* Power down all displays on reboot, poweroff or halt. */
+static void s6e63m0_shutdown(struct spi_device *spi)
+{
+	struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+
+	s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
+}
+
+static struct spi_driver s6e63m0_driver = {
+	.driver = {
+		.name	= "s6e63m0",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= s6e63m0_probe,
+	.remove		= __devexit_p(s6e63m0_remove),
+	.shutdown	= s6e63m0_shutdown,
+	.suspend	= s6e63m0_suspend,
+	.resume		= s6e63m0_resume,
+};
+
+static int __init s6e63m0_init(void)
+{
+	return spi_register_driver(&s6e63m0_driver);
+}
+
+static void __exit s6e63m0_exit(void)
+{
+	spi_unregister_driver(&s6e63m0_driver);
+}
+
+module_init(s6e63m0_init);
+module_exit(s6e63m0_exit);
+
+MODULE_AUTHOR("InKi Dae <[e-mail]>");
+MODULE_DESCRIPTION("S6E63M0 LCD Driver");
+MODULE_LICENSE("GPL");
+

drivers/video/backlight/s6e63m0_gamma.h

···
+/* linux/drivers/video/samsung/s6e63m0_brightness.h
+ *
+ * Gamma level definitions.
+ *
+ * Copyright (c) 2009 Samsung Electronics
+ * InKi Dae <[e-mail]>
+ *
+ * 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.
+*/
+
+#ifndef _S6E63M0_BRIGHTNESS_H
+#define _S6E63M0_BRIGHTNESS_H
+
+#define MAX_GAMMA_LEVEL		11
+#define GAMMA_TABLE_COUNT	21
+
+/* gamma value: 2.2 */
+static const unsigned int s6e63m0_22_300[] = {
+	0x18, 0x08, 0x24, 0x5f, 0x50, 0x2d, 0xB6,
+	0xB9, 0xA7, 0xAd, 0xB1, 0x9f, 0xbe, 0xC0,
+	0xB5, 0x00, 0xa0, 0x00, 0xa4, 0x00, 0xdb
+};
+
+static const unsigned int s6e63m0_22_280[] = {
+	0x18, 0x08, 0x24, 0x64, 0x56, 0x33, 0xB6,
+	0xBA, 0xA8, 0xAC, 0xB1, 0x9D, 0xC1, 0xC1,
+	0xB7, 0x00, 0x9C, 0x00, 0x9F, 0x00, 0xD6
+};
+
+static const unsigned int s6e63m0_22_260[] = {
+	0x18, 0x08, 0x24, 0x66, 0x58, 0x34, 0xB6,
+	0xBA, 0xA7, 0xAF, 0xB3, 0xA0, 0xC1, 0xC2,
+	0xB7, 0x00, 0x97, 0x00, 0x9A, 0x00, 0xD1
+
+};
+
+static const unsigned int s6e63m0_22_240[] = {
+	0x18, 0x08, 0x24, 0x62, 0x54, 0x30, 0xB9,
+	0xBB, 0xA9, 0xB0, 0xB3, 0xA1, 0xC1, 0xC3,
+	0xB7, 0x00, 0x91, 0x00, 0x95, 0x00, 0xDA
+
+};
+static const unsigned int s6e63m0_22_220[] = {
+	0x18, 0x08, 0x24, 0x63, 0x53, 0x31, 0xB8,
+	0xBC, 0xA9, 0xB0, 0xB5, 0xA2, 0xC4, 0xC4,
+	0xB8, 0x00, 0x8B, 0x00, 0x8E, 0x00, 0xC2
+};
+
+static const unsigned int s6e63m0_22_200[] = {
+	0x18, 0x08, 0x24, 0x66, 0x55, 0x34, 0xBA,
+	0xBD, 0xAB, 0xB1, 0xB5, 0xA3, 0xC5, 0xC6,
+	0xB9, 0x00, 0x85, 0x00, 0x88, 0x00, 0xBA
+};
+
+static const unsigned int s6e63m0_22_170[] = {
+	0x18, 0x08, 0x24, 0x69, 0x54, 0x37, 0xBB,
+	0xBE, 0xAC, 0xB4, 0xB7, 0xA6, 0xC7, 0xC8,
+	0xBC, 0x00, 0x7B, 0x00, 0x7E, 0x00, 0xAB
+};
+
+static const unsigned int s6e63m0_22_140[] = {
+	0x18, 0x08, 0x24, 0x6C, 0x54, 0x3A, 0xBC,
+	0xBF, 0xAC, 0xB7, 0xBB, 0xA9, 0xC9, 0xC9,
+	0xBE, 0x00, 0x71, 0x00, 0x73, 0x00, 0x9E
+};
+
+static const unsigned int s6e63m0_22_110[] = {
+	0x18, 0x08, 0x24, 0x70, 0x51, 0x3E, 0xBF,
+	0xC1, 0xAF, 0xB9, 0xBC, 0xAB, 0xCC, 0xCC,
+	0xC2, 0x00, 0x65, 0x00, 0x67, 0x00, 0x8D
+};
+
+static const unsigned int s6e63m0_22_90[] = {
+	0x18, 0x08, 0x24, 0x73, 0x4A, 0x3D, 0xC0,
+	0xC2, 0xB1, 0xBB, 0xBE, 0xAC, 0xCE, 0xCF,
+	0xC5, 0x00, 0x5D, 0x00, 0x5E, 0x00, 0x82
+};
+
+static const unsigned int s6e63m0_22_30[] = {
+	0x18, 0x08, 0x24, 0x78, 0xEC, 0x3D, 0xC8,
+	0xC2, 0xB6, 0xC4, 0xC7, 0xB6, 0xD5, 0xD7,
+	0xCC, 0x00, 0x39, 0x00, 0x36, 0x00, 0x51
+};
+
+/* gamma value: 1.9 */
+static const unsigned int s6e63m0_19_300[] = {
+	0x18, 0x08, 0x24, 0x61, 0x5F, 0x39, 0xBA,
+	0xBD, 0xAD, 0xB1, 0xB6, 0xA5, 0xC4, 0xC5,
+	0xBC, 0x00, 0xA0, 0x00, 0xA4, 0x00, 0xDB
+};
+
+static const unsigned int s6e63m0_19_280[] = {
+	0x18, 0x08, 0x24, 0x61, 0x60, 0x39, 0xBB,
+	0xBE, 0xAD, 0xB2, 0xB6, 0xA6, 0xC5, 0xC7,
+	0xBD, 0x00, 0x9B, 0x00, 0x9E, 0x00, 0xD5
+};
+
+static const unsigned int s6e63m0_19_260[] = {
+	0x18, 0x08, 0x24, 0x63, 0x61, 0x3B, 0xBA,
+	0xBE, 0xAC, 0xB3, 0xB8, 0xA7, 0xC6, 0xC8,
+	0xBD, 0x00, 0x96, 0x00, 0x98, 0x00, 0xCF
+};
+
+static const unsigned int s6e63m0_19_240[] = {
+	0x18, 0x08, 0x24, 0x67, 0x64, 0x3F, 0xBB,
+	0xBE, 0xAD, 0xB3, 0xB9, 0xA7, 0xC8, 0xC9,
+	0xBE, 0x00, 0x90, 0x00, 0x92, 0x00, 0xC8
+};
+
+static const unsigned int s6e63m0_19_220[] = {
+	0x18, 0x08, 0x24, 0x68, 0x64, 0x40, 0xBC,
+	0xBF, 0xAF, 0xB4, 0xBA, 0xA9, 0xC8, 0xCA,
+	0xBE, 0x00, 0x8B, 0x00, 0x8C, 0x00, 0xC0
+};
+
+static const unsigned int s6e63m0_19_200[] = {
+	0x18, 0x08, 0x24, 0x68, 0x64, 0x3F, 0xBE,
+	0xC0, 0xB0, 0xB6, 0xBB, 0xAB, 0xC8, 0xCB,
+	0xBF, 0x00, 0x85, 0x00, 0x86, 0x00, 0xB8
+};
+
+static const unsigned int s6e63m0_19_170[] = {
+	0x18, 0x08, 0x24, 0x69, 0x64, 0x40, 0xBF,
+	0xC1, 0xB0, 0xB9, 0xBE, 0xAD, 0xCB, 0xCD,
+	0xC2, 0x00, 0x7A, 0x00, 0x7B, 0x00, 0xAA
+};
+
+static const unsigned int s6e63m0_19_140[] = {
+	0x18, 0x08, 0x24, 0x6E, 0x65, 0x45, 0xC0,
+	0xC3, 0xB2, 0xBA, 0xBE, 0xAE, 0xCD, 0xD0,
+	0xC4, 0x00, 0x70, 0x00, 0x70, 0x00, 0x9C
+};
+
+static const unsigned int s6e63m0_19_110[] = {
+	0x18, 0x08, 0x24, 0x6F, 0x65, 0x46, 0xC2,
+	0xC4, 0xB3, 0xBF, 0xC2, 0xB2, 0xCF, 0xD1,
+	0xC6, 0x00, 0x64, 0x00, 0x64, 0x00, 0x8D
+};
+
+static const unsigned int s6e63m0_19_90[] = {
+	0x18, 0x08, 0x24, 0x74, 0x60, 0x4A, 0xC3,
+	0xC6, 0xB5, 0xBF, 0xC3, 0xB2, 0xD2, 0xD3,
+	0xC8, 0x00, 0x5B, 0x00, 0x5B, 0x00, 0x81
+};
+
+static const unsigned int s6e63m0_19_30[] = {
+	0x18, 0x08, 0x24, 0x84, 0x45, 0x4F, 0xCA,
+	0xCB, 0xBC, 0xC9, 0xCB, 0xBC, 0xDA, 0xDA,
+	0xD0, 0x00, 0x35, 0x00, 0x34, 0x00, 0x4E
+};
+
+/* gamma value: 1.7 */
+static const unsigned int s6e63m0_17_300[] = {
+	0x18, 0x08, 0x24, 0x70, 0x70, 0x4F, 0xBF,
+	0xC2, 0xB2, 0xB8, 0xBC, 0xAC, 0xCB, 0xCD,
+	0xC3, 0x00, 0xA0, 0x00, 0xA4, 0x00, 0xDB
+};
+
+static const unsigned int s6e63m0_17_280[] = {
+	0x18, 0x08, 0x24, 0x71, 0x71, 0x50, 0xBF,
+	0xC2, 0xB2, 0xBA, 0xBE, 0xAE, 0xCB, 0xCD,
+	0xC3, 0x00, 0x9C, 0x00, 0x9F, 0x00, 0xD6
+};
+
+static const unsigned int s6e63m0_17_260[] = {
+	0x18, 0x08, 0x24, 0x72, 0x72, 0x50, 0xC0,
+	0xC3, 0xB4, 0xB9, 0xBE, 0xAE, 0xCC, 0xCF,
+	0xC4, 0x00, 0x97, 0x00, 0x9A, 0x00, 0xD1
+};
+
+static const unsigned int s6e63m0_17_240[] = {
+	0x18, 0x08, 0x24, 0x71, 0x72, 0x4F, 0xC2,
+	0xC4, 0xB5, 0xBB, 0xBF, 0xB0, 0xCC, 0xCF,
+	0xC3, 0x00, 0x91, 0x00, 0x95, 0x00, 0xCA
+};
+
+static const unsigned int s6e63m0_17_220[] = {
+	0x18, 0x08, 0x24, 0x71, 0x73, 0x4F, 0xC2,
+	0xC5, 0xB5, 0xBD, 0xC0, 0xB2, 0xCD, 0xD1,
+	0xC5, 0x00, 0x8B, 0x00, 0x8E, 0x00, 0xC2
+};
+
+static const unsigned int s6e63m0_17_200[] = {
+	0x18, 0x08, 0x24, 0x72, 0x75, 0x51, 0xC2,
+	0xC6, 0xB5, 0xBF, 0xC1, 0xB3, 0xCE, 0xD1,
+	0xC6, 0x00, 0x85, 0x00, 0x88, 0x00, 0xBA
+};
+
+static const unsigned int s6e63m0_17_170[] = {
+	0x18, 0x08, 0x24, 0x75, 0x77, 0x54, 0xC3,
+	0xC7, 0xB7, 0xC0, 0xC3, 0xB4, 0xD1, 0xD3,
+	0xC9, 0x00, 0x7B, 0x00, 0x7E, 0x00, 0xAB
+};
+
+static const unsigned int s6e63m0_17_140[] = {
+	0x18, 0x08, 0x24, 0x7B, 0x77, 0x58, 0xC3,
+	0xC8, 0xB8, 0xC2, 0xC6, 0xB6, 0xD3, 0xD4,
+	0xCA, 0x00, 0x71, 0x00, 0x73, 0x00, 0x9E
+};
+
+static const unsigned int s6e63m0_17_110[] = {
+	0x18, 0x08, 0x24, 0x81, 0x7B, 0x5D, 0xC6,
+	0xCA, 0xBB, 0xC3, 0xC7, 0xB8, 0xD6, 0xD8,
+	0xCD, 0x00, 0x65, 0x00, 0x67, 0x00, 0x8D
+};
+
+static const unsigned int s6e63m0_17_90[] = {
+	0x18, 0x08, 0x24, 0x82, 0x7A, 0x5B, 0xC8,
+	0xCB, 0xBD, 0xC5, 0xCA, 0xBA, 0xD6, 0xD8,
+	0xCE, 0x00, 0x5D, 0x00, 0x5E, 0x00, 0x82
+};
+
+static const unsigned int s6e63m0_17_30[] = {
+	0x18, 0x08, 0x24, 0x8F, 0x73, 0x63, 0xD1,
+	0xD0, 0xC5, 0xCC, 0xD1, 0xC2, 0xDE, 0xE0,
+	0xD6, 0x00, 0x39, 0x00, 0x36, 0x00, 0x51
+};
+
+struct s6e63m0_gamma {
+	unsigned int *gamma_22_table[MAX_GAMMA_LEVEL];
+	unsigned int *gamma_19_table[MAX_GAMMA_LEVEL];
+	unsigned int *gamma_17_table[MAX_GAMMA_LEVEL];
+};
+
+static struct s6e63m0_gamma gamma_table = {
+	.gamma_22_table[0] = (unsigned int *)&s6e63m0_22_30,
+	.gamma_22_table[1] = (unsigned int *)&s6e63m0_22_90,
+	.gamma_22_table[2] = (unsigned int *)&s6e63m0_22_110,
+	.gamma_22_table[3] = (unsigned int *)&s6e63m0_22_140,
+	.gamma_22_table[4] = (unsigned int *)&s6e63m0_22_170,
+	.gamma_22_table[5] = (unsigned int *)&s6e63m0_22_200,
+	.gamma_22_table[6] = (unsigned int *)&s6e63m0_22_220,
+	.gamma_22_table[7] = (unsigned int *)&s6e63m0_22_240,
+	.gamma_22_table[8] = (unsigned int *)&s6e63m0_22_260,
+	.gamma_22_table[9] = (unsigned int *)&s6e63m0_22_280,
+	.gamma_22_table[10] = (unsigned int *)&s6e63m0_22_300,
+
+	.gamma_19_table[0] = (unsigned int *)&s6e63m0_19_30,
+	.gamma_19_table[1] = (unsigned int *)&s6e63m0_19_90,
+	.gamma_19_table[2] = (unsigned int *)&s6e63m0_19_110,
+	.gamma_19_table[3] = (unsigned int *)&s6e63m0_19_140,
+	.gamma_19_table[4] = (unsigned int *)&s6e63m0_19_170,
+	.gamma_19_table[5] = (unsigned int *)&s6e63m0_19_200,
+	.gamma_19_table[6] = (unsigned int *)&s6e63m0_19_220,
+	.gamma_19_table[7] = (unsigned int *)&s6e63m0_19_240,
+	.gamma_19_table[8] = (unsigned int *)&s6e63m0_19_260,
+	.gamma_19_table[9] = (unsigned int *)&s6e63m0_19_280,
+	.gamma_19_table[10] = (unsigned int *)&s6e63m0_19_300,
+
+	.gamma_17_table[0] = (unsigned int *)&s6e63m0_17_30,
+	.gamma_17_table[1] = (unsigned int *)&s6e63m0_17_90,
+	.gamma_17_table[2] = (unsigned int *)&s6e63m0_17_110,
+	.gamma_17_table[3] = (unsigned int *)&s6e63m0_17_140,
+	.gamma_17_table[4] = (unsigned int *)&s6e63m0_17_170,
+	.gamma_17_table[5] = (unsigned int *)&s6e63m0_17_200,
+	.gamma_17_table[6] = (unsigned int *)&s6e63m0_17_220,
+	.gamma_17_table[7] = (unsigned int *)&s6e63m0_17_240,
+	.gamma_17_table[8] = (unsigned int *)&s6e63m0_17_260,
+	.gamma_17_table[9] = (unsigned int *)&s6e63m0_17_280,
+	.gamma_17_table[10] = (unsigned int *)&s6e63m0_17_300,
+};
+
+#endif
+

include/linux/i2c/adp8860.h

···
+/*
+ * Definitions and platform data for Analog Devices
+ * Backlight drivers ADP8860
+ *
+ * Copyright 2009-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __LINUX_I2C_ADP8860_H
+#define __LINUX_I2C_ADP8860_H
+
+#include <linux/leds.h>
+#include <linux/types.h>
+
+#define ID_ADP8860		8860
+
+#define ADP8860_MAX_BRIGHTNESS	0x7F
+#define FLAG_OFFT_SHIFT 8
+
+/*
+ * LEDs subdevice platform data
+ */
+
+#define ADP8860_LED_DIS_BLINK	(0 << FLAG_OFFT_SHIFT)
+#define ADP8860_LED_OFFT_600ms	(1 << FLAG_OFFT_SHIFT)
+#define ADP8860_LED_OFFT_1200ms	(2 << FLAG_OFFT_SHIFT)
+#define ADP8860_LED_OFFT_1800ms	(3 << FLAG_OFFT_SHIFT)
+
+#define ADP8860_LED_ONT_200ms	0
+#define ADP8860_LED_ONT_600ms	1
+#define ADP8860_LED_ONT_800ms	2
+#define ADP8860_LED_ONT_1200ms	3
+
+#define ADP8860_LED_D7		(7)
+#define ADP8860_LED_D6		(6)
+#define ADP8860_LED_D5		(5)
+#define ADP8860_LED_D4		(4)
+#define ADP8860_LED_D3		(3)
+#define ADP8860_LED_D2		(2)
+#define ADP8860_LED_D1		(1)
+
+/*
+ * Backlight subdevice platform data
+ */
+
+#define ADP8860_BL_D7		(1 << 6)
+#define ADP8860_BL_D6		(1 << 5)
+#define ADP8860_BL_D5		(1 << 4)
+#define ADP8860_BL_D4		(1 << 3)
+#define ADP8860_BL_D3		(1 << 2)
+#define ADP8860_BL_D2		(1 << 1)
+#define ADP8860_BL_D1		(1 << 0)
+
+#define ADP8860_FADE_T_DIS	0	/* Fade Timer Disabled */
+#define ADP8860_FADE_T_300ms	1	/* 0.3 Sec */
+#define ADP8860_FADE_T_600ms	2
+#define ADP8860_FADE_T_900ms	3
+#define ADP8860_FADE_T_1200ms	4
+#define ADP8860_FADE_T_1500ms	5
+#define ADP8860_FADE_T_1800ms	6
+#define ADP8860_FADE_T_2100ms	7
+#define ADP8860_FADE_T_2400ms	8
+#define ADP8860_FADE_T_2700ms	9
+#define ADP8860_FADE_T_3000ms	10
+#define ADP8860_FADE_T_3500ms	11
+#define ADP8860_FADE_T_4000ms	12
+#define ADP8860_FADE_T_4500ms	13
+#define ADP8860_FADE_T_5000ms	14
+#define ADP8860_FADE_T_5500ms	15	/* 5.5 Sec */
+
+#define ADP8860_FADE_LAW_LINEAR	0
+#define ADP8860_FADE_LAW_SQUARE	1
+#define ADP8860_FADE_LAW_CUBIC1	2
+#define ADP8860_FADE_LAW_CUBIC2	3
+
+#define ADP8860_BL_AMBL_FILT_80ms	0	/* Light sensor filter time */
+#define ADP8860_BL_AMBL_FILT_160ms	1
+#define ADP8860_BL_AMBL_FILT_320ms	2
+#define ADP8860_BL_AMBL_FILT_640ms	3
+#define ADP8860_BL_AMBL_FILT_1280ms	4
+#define ADP8860_BL_AMBL_FILT_2560ms	5
+#define ADP8860_BL_AMBL_FILT_5120ms	6
+#define ADP8860_BL_AMBL_FILT_10240ms	7	/* 10.24 sec */
+
+/*
+ * Blacklight current 0..30mA
+ */
+#define ADP8860_BL_CUR_mA(I)		((I * 127) / 30)
+
+/*
+ * L2 comparator current 0..1106uA
+ */
+#define ADP8860_L2_COMP_CURR_uA(I)	((I * 255) / 1106)
+
+/*
+ * L3 comparator current 0..138uA
+ */
+#define ADP8860_L3_COMP_CURR_uA(I)	((I * 255) / 138)
+
+struct adp8860_backlight_platform_data {
+	u8 bl_led_assign;	/* 1 = Backlight 0 = Individual LED */
+
+	u8 bl_fade_in;		/* Backlight Fade-In Timer */
+	u8 bl_fade_out;		/* Backlight Fade-Out Timer */
+	u8 bl_fade_law;		/* fade-on/fade-off transfer characteristic */
+
+	u8 en_ambl_sens;	/* 1 = enable ambient light sensor */
+	u8 abml_filt;		/* Light sensor filter time */
+
+	u8 l1_daylight_max;	/* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+	u8 l1_daylight_dim;	/* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+	u8 l2_office_max;	/* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+	u8 l2_office_dim;	/* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+	u8 l3_dark_max;		/* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+	u8 l3_dark_dim;		/* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+
+	u8 l2_trip;		/* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
+	u8 l2_hyst;		/* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
+	u8 l3_trip;		/* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
+	u8 l3_hyst;		/* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
+
+	/**
+	 * Independent Current Sinks / LEDS
+	 * Sinks not assigned to the Backlight can be exposed to
+	 * user space using the LEDS CLASS interface
+	 */
+
+	int num_leds;
+	struct led_info	*leds;
+	u8 led_fade_in;		/* LED Fade-In Timer */
+	u8 led_fade_out;	/* LED Fade-Out Timer */
+	u8 led_fade_law;	/* fade-on/fade-off transfer characteristic */
+	u8 led_on_time;
+
+	/**
+	 * Gain down disable. Setting this option does not allow the
+	 * charge pump to switch to lower gains. NOT AVAILABLE on ADP8860
+	 * 1 = the charge pump doesn't switch down in gain until all LEDs are 0.
+	 *  The charge pump switches up in gain as needed. This feature is
+	 *  useful if the ADP8863 charge pump is used to drive an external load.
+	 *  This feature must be used when utilizing small fly capacitors
+	 *  (0402 or smaller).
+	 * 0 = the charge pump automatically switches up and down in gain.
+	 *  This provides optimal efficiency, but is not suitable for driving
+	 *  loads that are not connected through the ADP8863 diode drivers.
+	 *  Additionally, the charge pump fly capacitors should be low ESR
+	 * and sized 0603 or greater.
+	 */
+
+	u8 gdwn_dis;
+};
+
+#endif /* __LINUX_I2C_ADP8860_H */

include/linux/lcd.h

···
 	struct device dev;
 };
 
+struct lcd_platform_data {
+	/* reset lcd panel device. */
+	int (*reset)(struct lcd_device *ld);
+	/* on or off to lcd panel. if 'enable' is 0 then
+	   lcd power off and 1, lcd power on. */
+	int (*power_on)(struct lcd_device *ld, int enable);
+
+	/* it indicates whether lcd panel was enabled
+	   from bootloader or not. */
+	int lcd_enabled;
+	/* it means delay for stable time when it becomes low to high
+	   or high to low that is dependent on whether reset gpio is
+	   low active or high active. */
+	unsigned int reset_delay;
+	/* stable time needing to become lcd power on. */
+	unsigned int power_on_delay;
+	/* stable time needing to become lcd power off. */
+	unsigned int power_off_delay;
+
+	/* it could be used for any purpose. */
+	void *pdata;
+};
+
 static inline void lcd_set_power(struct lcd_device *ld, int power)
 {
 	mutex_lock(&ld->update_lock);

include/linux/mfd/pcf50633/backlight.h

···
+/*
+ *  Copyright (C) 2009-2010, Lars-Peter Clausen <[e-mail]>
+ *      PCF50633 backlight device driver
+ *
+ *  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 __LINUX_MFD_PCF50633_BACKLIGHT
+#define __LINUX_MFD_PCF50633_BACKLIGHT
+
+/*
+* @default_brightness: Backlight brightness is initialized to this value
+*
+* Brightness to be used after the driver has been probed.
+* Valid range 0-63.
+*
+* @default_brightness_limit: The actual brightness is limited by this value
+*
+* Brightness limit to be used after the driver has been probed. This is useful
+* when it is not known how much power is available for the backlight during
+* probe.
+* Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit.
+*
+* @ramp_time: Display ramp time when changing brightness
+*
+* When changing the backlights brightness the change is not instant, instead
+* it fades smooth from one state to another. This value specifies how long
+* the fade should take. The lower the value the higher the fade time.
+* Valid range 0-255
+*/
+struct pcf50633_bl_platform_data {
+	unsigned int	default_brightness;
+	unsigned int	default_brightness_limit;
+	uint8_t		ramp_time;
+};
+
+
+struct pcf50633;
+
+int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit);
+
+#endif
+

include/linux/mfd/pcf50633/core.h

···
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/power_supply.h>
+#include <linux/mfd/pcf50633/backlight.h>
 
 struct pcf50633;
 
···
 	void (*force_shutdown)(struct pcf50633 *);
 
 	u8 resumers[5];
+
+	struct pcf50633_bl_platform_data *backlight_data;
 };
 
 struct pcf50633_irq {
···
 	struct platform_device *mbc_pdev;
 	struct platform_device *adc_pdev;
 	struct platform_device *input_pdev;
+	struct platform_device *bl_pdev;
 	struct platform_device *regulator_pdev[PCF50633_NUM_REGULATORS];
 };