Merge tag 'backlight-next-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

Pull backlight updates from Lee Jones:
 "Old Drivers
   - Remove driver for S6E63M0
   - Remove driver for LD9040

  Fix-ups
   - Trivial (email address update); adp*_bl
   - Use 'atomic' PWM API; pwm_bl

  Bug Fixes
   - Remove pointless boolen '&ptr' check; lm3639_bl"

* tag 'backlight-next-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: Remove ld9040 driver
  backlight: Remove s6e63m0 driver
  backlight: lm3639: Unconditionally call led_classdev_unregister
  backlight: pwm_bl: Switch to using "atomic" PWM API
  backlight: Update MODULE AUTHOR email address

11 files changed, 47 insertions, 2200 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 2919e2334052..71ee978c848f 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -111,22 +111,6 @@ config LCD_HP700
 	  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.
-
-config LCD_LD9040
-	tristate "LD9040 AMOLED LCD Driver"
-	depends on SPI && BACKLIGHT_CLASS_DEVICE
-	default n
-	help
-	  If you have an LD9040 Panel, say Y to enable its
-	  control driver.
-
 config LCD_AMS369FG06
 	tristate "AMS369FG06 AMOLED LCD Driver"
 	depends on SPI && BACKLIGHT_CLASS_DEVICE
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 0dcc2c745c03..63c507c07437 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -9,13 +9,11 @@ obj-$(CONFIG_LCD_HX8357)		+= hx8357.o
 obj-$(CONFIG_LCD_ILI922X)		+= ili922x.o
 obj-$(CONFIG_LCD_ILI9320)		+= ili9320.o
 obj-$(CONFIG_LCD_L4F00242T03)		+= l4f00242t03.o
-obj-$(CONFIG_LCD_LD9040)		+= ld9040.o
 obj-$(CONFIG_LCD_LMS283GF05)		+= lms283gf05.o
 obj-$(CONFIG_LCD_LMS501KF03)		+= lms501kf03.o
 obj-$(CONFIG_LCD_LTV350QV)		+= ltv350qv.o
 obj-$(CONFIG_LCD_OTM3225A)		+= otm3225a.o
 obj-$(CONFIG_LCD_PLATFORM)		+= platform_lcd.o
-obj-$(CONFIG_LCD_S6E63M0)		+= s6e63m0.o
 obj-$(CONFIG_LCD_TDO24M)		+= tdo24m.o
 obj-$(CONFIG_LCD_TOSA)			+= tosa_lcd.o
 obj-$(CONFIG_LCD_VGG2432A4)		+= vgg2432a4.o
diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c
index 35373e2065b2..5e38353b4423 100644
--- a/drivers/video/backlight/adp5520_bl.c
+++ b/drivers/video/backlight/adp5520_bl.c
@@ -391,7 +391,7 @@ static struct platform_driver adp5520_bl_driver = {
 
 module_platform_driver(adp5520_bl_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:adp5520-backlight");
diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
index f1dc41cf19e3..85318236da2f 100644
--- a/drivers/video/backlight/adp8860_bl.c
+++ b/drivers/video/backlight/adp8860_bl.c
@@ -822,5 +822,5 @@ static struct i2c_driver adp8860_driver = {
 module_i2c_driver(adp8860_driver);
 
 MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("ADP8860 Backlight driver");
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
index 4fec9aa92d9b..8d50e0299578 100644
--- a/drivers/video/backlight/adp8870_bl.c
+++ b/drivers/video/backlight/adp8870_bl.c
@@ -992,5 +992,5 @@ static struct i2c_driver adp8870_driver = {
 module_i2c_driver(adp8870_driver);
 
 MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("ADP8870 Backlight driver");
diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c
deleted file mode 100644
index 677f8abba27c..000000000000
--- a/drivers/video/backlight/ld9040.c
+++ /dev/null
@@ -1,811 +0,0 @@
-/*
- * ld9040 AMOLED LCD panel driver.
- *
- * Copyright (c) 2011 Samsung Electronics
- * Author: Donghwa Lee  <dh09.lee@samsung.com>
- * Derived from drivers/video/backlight/s6e63m0.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.
- */
-
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/fb.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/lcd.h>
-#include <linux/module.h>
-#include <linux/regulator/consumer.h>
-#include <linux/spi/spi.h>
-#include <linux/wait.h>
-
-#include "ld9040_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		24
-
-struct ld9040 {
-	struct device			*dev;
-	struct spi_device		*spi;
-	unsigned int			power;
-	unsigned int			current_brightness;
-
-	struct lcd_device		*ld;
-	struct backlight_device		*bd;
-	struct lcd_platform_data	*lcd_pd;
-
-	struct mutex			lock;
-	bool  enabled;
-};
-
-static struct regulator_bulk_data supplies[] = {
-	{ .supply = "vdd3", },
-	{ .supply = "vci", },
-};
-
-static void ld9040_regulator_enable(struct ld9040 *lcd)
-{
-	int ret = 0;
-	struct lcd_platform_data *pd = NULL;
-
-	pd = lcd->lcd_pd;
-	mutex_lock(&lcd->lock);
-	if (!lcd->enabled) {
-		ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
-		if (ret)
-			goto out;
-
-		lcd->enabled = true;
-	}
-	msleep(pd->power_on_delay);
-out:
-	mutex_unlock(&lcd->lock);
-}
-
-static void ld9040_regulator_disable(struct ld9040 *lcd)
-{
-	int ret = 0;
-
-	mutex_lock(&lcd->lock);
-	if (lcd->enabled) {
-		ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
-		if (ret)
-			goto out;
-
-		lcd->enabled = false;
-	}
-out:
-	mutex_unlock(&lcd->lock);
-}
-
-static const unsigned short seq_swreset[] = {
-	0x01, COMMAND_ONLY,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_user_setting[] = {
-	0xF0, 0x5A,
-
-	DATA_ONLY, 0x5A,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_elvss_on[] = {
-	0xB1, 0x0D,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x16,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_gtcon[] = {
-	0xF7, 0x09,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_panel_condition[] = {
-	0xF8, 0x05,
-
-	DATA_ONLY, 0x65,
-	DATA_ONLY, 0x96,
-	DATA_ONLY, 0x71,
-	DATA_ONLY, 0x7D,
-	DATA_ONLY, 0x19,
-	DATA_ONLY, 0x3B,
-	DATA_ONLY, 0x0D,
-	DATA_ONLY, 0x19,
-	DATA_ONLY, 0x7E,
-	DATA_ONLY, 0x0D,
-	DATA_ONLY, 0xE2,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x7E,
-	DATA_ONLY, 0x7D,
-	DATA_ONLY, 0x07,
-	DATA_ONLY, 0x07,
-	DATA_ONLY, 0x20,
-	DATA_ONLY, 0x20,
-	DATA_ONLY, 0x20,
-	DATA_ONLY, 0x02,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_gamma_set1[] = {
-	0xF9, 0x00,
-
-	DATA_ONLY, 0xA7,
-	DATA_ONLY, 0xB4,
-	DATA_ONLY, 0xAE,
-	DATA_ONLY, 0xBF,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x91,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0xB2,
-	DATA_ONLY, 0xB4,
-	DATA_ONLY, 0xAA,
-	DATA_ONLY, 0xBB,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0xAC,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0xB3,
-	DATA_ONLY, 0xB1,
-	DATA_ONLY, 0xAA,
-	DATA_ONLY, 0xBC,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0xB3,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_gamma_ctrl[] = {
-	0xFB, 0x02,
-
-	DATA_ONLY, 0x5A,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_gamma_start[] = {
-	0xF9, COMMAND_ONLY,
-
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_apon[] = {
-	0xF3, 0x00,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x0A,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_display_ctrl[] = {
-	0xF2, 0x02,
-
-	DATA_ONLY, 0x08,
-	DATA_ONLY, 0x08,
-	DATA_ONLY, 0x10,
-	DATA_ONLY, 0x10,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_manual_pwr[] = {
-	0xB0, 0x04,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_pwr_ctrl[] = {
-	0xF4, 0x0A,
-
-	DATA_ONLY, 0x87,
-	DATA_ONLY, 0x25,
-	DATA_ONLY, 0x6A,
-	DATA_ONLY, 0x44,
-	DATA_ONLY, 0x02,
-	DATA_ONLY, 0x88,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_sleep_out[] = {
-	0x11, COMMAND_ONLY,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_sleep_in[] = {
-	0x10, COMMAND_ONLY,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_display_on[] = {
-	0x29, COMMAND_ONLY,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_display_off[] = {
-	0x28, COMMAND_ONLY,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vci1_1st_en[] = {
-	0xF3, 0x10,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vl1_en[] = {
-	0xF3, 0x11,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vl2_en[] = {
-	0xF3, 0x13,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vci1_2nd_en[] = {
-	0xF3, 0x33,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vl3_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vreg1_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0x01,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vgh_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0x11,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vgl_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0x31,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x02,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vmos_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xB1,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vint_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xF1,
-	/* DATA_ONLY, 0x71,	VMOS/VBL/VBH not used */
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vbh_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xF9,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_vbl_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xFD,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_gam_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xFF,
-	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_sd_amp_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xFF,
-	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
-	DATA_ONLY, 0x80,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_gls_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xFF,
-	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
-	DATA_ONLY, 0x81,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_els_en[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xFF,
-	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
-	DATA_ONLY, 0x83,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
-	ENDDEF, 0x00
-};
-
-static const unsigned short seq_el_on[] = {
-	0xF3, 0x37,
-
-	DATA_ONLY, 0xFF,
-	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
-	DATA_ONLY, 0x87,
-	DATA_ONLY, 0x00,
-	DATA_ONLY, 0x03,
-	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
-	ENDDEF, 0x00
-};
-
-static int ld9040_spi_write_byte(struct ld9040 *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 ld9040_spi_write(struct ld9040 *lcd, unsigned char address,
-	unsigned char command)
-{
-	int ret = 0;
-
-	if (address != DATA_ONLY)
-		ret = ld9040_spi_write_byte(lcd, 0x0, address);
-	if (command != COMMAND_ONLY)
-		ret = ld9040_spi_write_byte(lcd, 0x1, command);
-
-	return ret;
-}
-
-static int ld9040_panel_send_sequence(struct ld9040 *lcd,
-	const unsigned short *wbuf)
-{
-	int ret = 0, i = 0;
-
-	while ((wbuf[i] & DEFMASK) != ENDDEF) {
-		if ((wbuf[i] & DEFMASK) != SLEEPMSEC) {
-			ret = ld9040_spi_write(lcd, wbuf[i], wbuf[i+1]);
-			if (ret)
-				break;
-		} else {
-			msleep(wbuf[i+1]);
-		}
-		i += 2;
-	}
-
-	return ret;
-}
-
-static int _ld9040_gamma_ctl(struct ld9040 *lcd, const unsigned int *gamma)
-{
-	unsigned int i = 0;
-	int ret = 0;
-
-	/* start gamma table updating. */
-	ret = ld9040_panel_send_sequence(lcd, seq_gamma_start);
-	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 = ld9040_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 = ld9040_panel_send_sequence(lcd, seq_gamma_ctrl);
-	if (ret)
-		dev_err(lcd->dev, "failed to update gamma table.\n");
-
-gamma_err:
-	return ret;
-}
-
-static int ld9040_gamma_ctl(struct ld9040 *lcd, int gamma)
-{
-	return _ld9040_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]);
-}
-
-static int ld9040_ldi_init(struct ld9040 *lcd)
-{
-	int ret, i;
-	static const unsigned short *init_seq[] = {
-		seq_user_setting,
-		seq_panel_condition,
-		seq_display_ctrl,
-		seq_manual_pwr,
-		seq_elvss_on,
-		seq_gtcon,
-		seq_gamma_set1,
-		seq_gamma_ctrl,
-		seq_sleep_out,
-	};
-
-	for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
-		ret = ld9040_panel_send_sequence(lcd, init_seq[i]);
-		/* workaround: minimum delay time for transferring CMD */
-		usleep_range(300, 310);
-		if (ret)
-			break;
-	}
-
-	return ret;
-}
-
-static int ld9040_ldi_enable(struct ld9040 *lcd)
-{
-	return ld9040_panel_send_sequence(lcd, seq_display_on);
-}
-
-static int ld9040_ldi_disable(struct ld9040 *lcd)
-{
-	int ret;
-
-	ret = ld9040_panel_send_sequence(lcd, seq_display_off);
-	ret = ld9040_panel_send_sequence(lcd, seq_sleep_in);
-
-	return ret;
-}
-
-static int ld9040_power_is_on(int power)
-{
-	return power <= FB_BLANK_NORMAL;
-}
-
-static int ld9040_power_on(struct ld9040 *lcd)
-{
-	int ret = 0;
-	struct lcd_platform_data *pd;
-
-	pd = lcd->lcd_pd;
-
-	/* lcd power on */
-	ld9040_regulator_enable(lcd);
-
-	if (!pd->reset) {
-		dev_err(lcd->dev, "reset is NULL.\n");
-		return -EINVAL;
-	}
-
-	pd->reset(lcd->ld);
-	msleep(pd->reset_delay);
-
-	ret = ld9040_ldi_init(lcd);
-	if (ret) {
-		dev_err(lcd->dev, "failed to initialize ldi.\n");
-		return ret;
-	}
-
-	ret = ld9040_ldi_enable(lcd);
-	if (ret) {
-		dev_err(lcd->dev, "failed to enable ldi.\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static int ld9040_power_off(struct ld9040 *lcd)
-{
-	int ret;
-	struct lcd_platform_data *pd;
-
-	pd = lcd->lcd_pd;
-
-	ret = ld9040_ldi_disable(lcd);
-	if (ret) {
-		dev_err(lcd->dev, "lcd setting failed.\n");
-		return -EIO;
-	}
-
-	msleep(pd->power_off_delay);
-
-	/* lcd power off */
-	ld9040_regulator_disable(lcd);
-
-	return 0;
-}
-
-static int ld9040_power(struct ld9040 *lcd, int power)
-{
-	int ret = 0;
-
-	if (ld9040_power_is_on(power) && !ld9040_power_is_on(lcd->power))
-		ret = ld9040_power_on(lcd);
-	else if (!ld9040_power_is_on(power) && ld9040_power_is_on(lcd->power))
-		ret = ld9040_power_off(lcd);
-
-	if (!ret)
-		lcd->power = power;
-
-	return ret;
-}
-
-static int ld9040_set_power(struct lcd_device *ld, int power)
-{
-	struct ld9040 *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 ld9040_power(lcd, power);
-}
-
-static int ld9040_get_power(struct lcd_device *ld)
-{
-	struct ld9040 *lcd = lcd_get_data(ld);
-
-	return lcd->power;
-}
-
-static int ld9040_set_brightness(struct backlight_device *bd)
-{
-	int ret = 0, brightness = bd->props.brightness;
-	struct ld9040 *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 = ld9040_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 ld9040_lcd_ops = {
-	.set_power = ld9040_set_power,
-	.get_power = ld9040_get_power,
-};
-
-static const struct backlight_ops ld9040_backlight_ops  = {
-	.update_status = ld9040_set_brightness,
-};
-
-static int ld9040_probe(struct spi_device *spi)
-{
-	int ret = 0;
-	struct ld9040 *lcd = NULL;
-	struct lcd_device *ld = NULL;
-	struct backlight_device *bd = NULL;
-	struct backlight_properties props;
-
-	lcd = devm_kzalloc(&spi->dev, sizeof(struct ld9040), GFP_KERNEL);
-	if (!lcd)
-		return -ENOMEM;
-
-	/* ld9040 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");
-		return ret;
-	}
-
-	lcd->spi = spi;
-	lcd->dev = &spi->dev;
-
-	lcd->lcd_pd = dev_get_platdata(&spi->dev);
-	if (!lcd->lcd_pd) {
-		dev_err(&spi->dev, "platform data is NULL.\n");
-		return -EINVAL;
-	}
-
-	mutex_init(&lcd->lock);
-
-	ret = devm_regulator_bulk_get(lcd->dev, ARRAY_SIZE(supplies), supplies);
-	if (ret) {
-		dev_err(lcd->dev, "Failed to get regulators: %d\n", ret);
-		return ret;
-	}
-
-	ld = devm_lcd_device_register(&spi->dev, "ld9040", &spi->dev, lcd,
-					&ld9040_lcd_ops);
-	if (IS_ERR(ld))
-		return PTR_ERR(ld);
-
-	lcd->ld = ld;
-
-	memset(&props, 0, sizeof(struct backlight_properties));
-	props.type = BACKLIGHT_RAW;
-	props.max_brightness = MAX_BRIGHTNESS;
-
-	bd = devm_backlight_device_register(&spi->dev, "ld9040-bl", &spi->dev,
-					lcd, &ld9040_backlight_ops, &props);
-	if (IS_ERR(bd))
-		return PTR_ERR(bd);
-
-	bd->props.brightness = MAX_BRIGHTNESS;
-	lcd->bd = bd;
-
-	/*
-	 * 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;
-
-		ld9040_power(lcd, FB_BLANK_UNBLANK);
-	} else {
-		lcd->power = FB_BLANK_UNBLANK;
-	}
-
-	spi_set_drvdata(spi, lcd);
-
-	dev_info(&spi->dev, "ld9040 panel driver has been probed.\n");
-	return 0;
-}
-
-static int ld9040_remove(struct spi_device *spi)
-{
-	struct ld9040 *lcd = spi_get_drvdata(spi);
-
-	ld9040_power(lcd, FB_BLANK_POWERDOWN);
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int ld9040_suspend(struct device *dev)
-{
-	struct ld9040 *lcd = dev_get_drvdata(dev);
-
-	dev_dbg(dev, "lcd->power = %d\n", lcd->power);
-
-	/*
-	 * when lcd panel is suspend, lcd panel becomes off
-	 * regardless of status.
-	 */
-	return ld9040_power(lcd, FB_BLANK_POWERDOWN);
-}
-
-static int ld9040_resume(struct device *dev)
-{
-	struct ld9040 *lcd = dev_get_drvdata(dev);
-
-	lcd->power = FB_BLANK_POWERDOWN;
-
-	return ld9040_power(lcd, FB_BLANK_UNBLANK);
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(ld9040_pm_ops, ld9040_suspend, ld9040_resume);
-
-/* Power down all displays on reboot, poweroff or halt. */
-static void ld9040_shutdown(struct spi_device *spi)
-{
-	struct ld9040 *lcd = spi_get_drvdata(spi);
-
-	ld9040_power(lcd, FB_BLANK_POWERDOWN);
-}
-
-static struct spi_driver ld9040_driver = {
-	.driver = {
-		.name	= "ld9040",
-		.pm	= &ld9040_pm_ops,
-	},
-	.probe		= ld9040_probe,
-	.remove		= ld9040_remove,
-	.shutdown	= ld9040_shutdown,
-};
-
-module_spi_driver(ld9040_driver);
-
-MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
-MODULE_DESCRIPTION("ld9040 LCD Driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/video/backlight/ld9040_gamma.h b/drivers/video/backlight/ld9040_gamma.h
deleted file mode 100644
index c5e586d97385..000000000000
--- a/drivers/video/backlight/ld9040_gamma.h
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * Gamma level definitions.
- *
- * Copyright (c) 2011 Samsung Electronics
- * InKi Dae <inki.dae@samsung.com>
- * Donghwa Lee <dh09.lee@samsung.com>
- *
- * 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 _LD9040_BRIGHTNESS_H
-#define _LD9040_BRIGHTNESS_H
-
-#define MAX_GAMMA_LEVEL		25
-#define GAMMA_TABLE_COUNT	21
-
-/* gamma value: 2.2 */
-static const unsigned int ld9040_22_300[] = {
-	0x00, 0xa7, 0xb4, 0xae, 0xbf, 0x00, 0x91,
-	0x00, 0xb2, 0xb4, 0xaa, 0xbb, 0x00, 0xac,
-	0x00, 0xb3, 0xb1, 0xaa, 0xbc, 0x00, 0xb3
-};
-
-static const unsigned int ld9040_22_290[] = {
-	0x00, 0xa9, 0xb7, 0xae, 0xbd, 0x00, 0x89,
-	0x00, 0xb7, 0xb6, 0xa8, 0xba, 0x00, 0xa4,
-	0x00, 0xb1, 0xb4, 0xaa, 0xbb, 0x00, 0xaa
-};
-
-static const unsigned int ld9040_22_280[] = {
-	0x00, 0xa9, 0xb6, 0xad, 0xbf, 0x00, 0x86,
-	0x00, 0xb8, 0xb5, 0xa8, 0xbc, 0x00, 0xa0,
-	0x00, 0xb3, 0xb3, 0xa9, 0xbc, 0x00, 0xa7
-};
-
-static const unsigned int ld9040_22_270[] = {
-	0x00, 0xa8, 0xb8, 0xae, 0xbe, 0x00, 0x84,
-	0x00, 0xb9, 0xb7, 0xa8, 0xbc, 0x00, 0x9d,
-	0x00, 0xb2, 0xb5, 0xaa, 0xbc, 0x00, 0xa4
-
-};
-static const unsigned int ld9040_22_260[] = {
-	0x00, 0xa4, 0xb8, 0xb0, 0xbf, 0x00, 0x80,
-	0x00, 0xb8, 0xb6, 0xaa, 0xbc, 0x00, 0x9a,
-	0x00, 0xb0, 0xb5, 0xab, 0xbd, 0x00, 0xa0
-};
-
-static const unsigned int ld9040_22_250[] = {
-	0x00, 0xa4, 0xb9, 0xaf, 0xc1, 0x00, 0x7d,
-	0x00, 0xb9, 0xb6, 0xaa, 0xbb, 0x00, 0x97,
-	0x00, 0xb1, 0xb5, 0xaa, 0xbf, 0x00, 0x9d
-};
-
-static const unsigned int ld9040_22_240[] = {
-	0x00, 0xa2, 0xb9, 0xaf, 0xc2, 0x00, 0x7a,
-	0x00, 0xb9, 0xb7, 0xaa, 0xbd, 0x00, 0x94,
-	0x00, 0xb0, 0xb5, 0xab, 0xbf, 0x00, 0x9a
-};
-
-static const unsigned int ld9040_22_230[] = {
-	0x00, 0xa0, 0xb9, 0xaf, 0xc3, 0x00, 0x77,
-	0x00, 0xb9, 0xb7, 0xab, 0xbe, 0x00, 0x90,
-	0x00, 0xb0, 0xb6, 0xab, 0xbf, 0x00, 0x97
-};
-
-static const unsigned int ld9040_22_220[] = {
-	0x00, 0x9e, 0xba, 0xb0, 0xc2, 0x00, 0x75,
-	0x00, 0xb9, 0xb8, 0xab, 0xbe, 0x00, 0x8e,
-	0x00, 0xb0, 0xb6, 0xac, 0xbf, 0x00, 0x94
-};
-
-static const unsigned int ld9040_22_210[] = {
-	0x00, 0x9c, 0xb9, 0xb0, 0xc4, 0x00, 0x72,
-	0x00, 0xb8, 0xb8, 0xac, 0xbf, 0x00, 0x8a,
-	0x00, 0xb0, 0xb6, 0xac, 0xc0, 0x00, 0x91
-};
-
-static const unsigned int ld9040_22_200[] = {
-	0x00, 0x9a, 0xba, 0xb1, 0xc4, 0x00, 0x6f,
-	0x00, 0xb8, 0xb8, 0xad, 0xc0, 0x00, 0x86,
-	0x00, 0xb0, 0xb7, 0xad, 0xc0, 0x00, 0x8d
-};
-
-static const unsigned int ld9040_22_190[] = {
-	0x00, 0x97, 0xba, 0xb2, 0xc5, 0x00, 0x6c,
-	0x00, 0xb8, 0xb8, 0xae, 0xc1, 0x00, 0x82,
-	0x00, 0xb0, 0xb6, 0xae, 0xc2, 0x00, 0x89
-};
-
-static const unsigned int ld9040_22_180[] = {
-	0x00, 0x93, 0xba, 0xb3, 0xc5, 0x00, 0x69,
-	0x00, 0xb8, 0xb9, 0xae, 0xc1, 0x00, 0x7f,
-	0x00, 0xb0, 0xb6, 0xae, 0xc3, 0x00, 0x85
-};
-
-static const unsigned int ld9040_22_170[] = {
-	0x00, 0x8b, 0xb9, 0xb3, 0xc7, 0x00, 0x65,
-	0x00, 0xb7, 0xb8, 0xaf, 0xc3, 0x00, 0x7a,
-	0x00, 0x80, 0xb6, 0xae, 0xc4, 0x00, 0x81
-};
-
-static const unsigned int ld9040_22_160[] = {
-	0x00, 0x89, 0xba, 0xb3, 0xc8, 0x00, 0x62,
-	0x00, 0xb6, 0xba, 0xaf, 0xc3, 0x00, 0x76,
-	0x00, 0xaf, 0xb7, 0xae, 0xc4, 0x00, 0x7e
-};
-
-static const unsigned int ld9040_22_150[] = {
-	0x00, 0x82, 0xba, 0xb4, 0xc7, 0x00, 0x5f,
-	0x00, 0xb5, 0xba, 0xb0, 0xc3, 0x00, 0x72,
-	0x00, 0xae, 0xb8, 0xb0, 0xc3, 0x00, 0x7a
-};
-
-static const unsigned int ld9040_22_140[] = {
-	0x00, 0x7b, 0xbb, 0xb4, 0xc8, 0x00, 0x5b,
-	0x00, 0xb5, 0xba, 0xb1, 0xc4, 0x00, 0x6e,
-	0x00, 0xae, 0xb9, 0xb0, 0xc5, 0x00, 0x75
-};
-
-static const unsigned int ld9040_22_130[] = {
-	0x00, 0x71, 0xbb, 0xb5, 0xc8, 0x00, 0x57,
-	0x00, 0xb5, 0xbb, 0xb0, 0xc5, 0x00, 0x6a,
-	0x00, 0xae, 0xb9, 0xb1, 0xc6, 0x00, 0x70
-};
-
-static const unsigned int ld9040_22_120[] = {
-	0x00, 0x47, 0xba, 0xb6, 0xca, 0x00, 0x53,
-	0x00, 0xb5, 0xbb, 0xb3, 0xc6, 0x00, 0x65,
-	0x00, 0xae, 0xb8, 0xb3, 0xc7, 0x00, 0x6c
-};
-
-static const unsigned int ld9040_22_110[] = {
-	0x00, 0x13, 0xbb, 0xb7, 0xca, 0x00, 0x4f,
-	0x00, 0xb4, 0xbb, 0xb3, 0xc7, 0x00, 0x60,
-	0x00, 0xad, 0xb8, 0xb4, 0xc7, 0x00, 0x67
-};
-
-static const unsigned int ld9040_22_100[] = {
-	0x00, 0x13, 0xba, 0xb8, 0xcb, 0x00, 0x4b,
-	0x00, 0xb3, 0xbc, 0xb4, 0xc7, 0x00, 0x5c,
-	0x00, 0xac, 0xb8, 0xb4, 0xc8, 0x00, 0x62
-};
-
-static const unsigned int ld9040_22_90[] = {
-	0x00, 0x13, 0xb9, 0xb8, 0xcd, 0x00, 0x46,
-	0x00, 0xb1, 0xbc, 0xb5, 0xc8, 0x00, 0x56,
-	0x00, 0xaa, 0xb8, 0xb4, 0xc9, 0x00, 0x5d
-};
-
-static const unsigned int ld9040_22_80[] = {
-	0x00, 0x13, 0xba, 0xb9, 0xcd, 0x00, 0x41,
-	0x00, 0xb0, 0xbe, 0xb5, 0xc9, 0x00, 0x51,
-	0x00, 0xa9, 0xb9, 0xb5, 0xca, 0x00, 0x57
-};
-
-static const unsigned int ld9040_22_70[] = {
-	0x00, 0x13, 0xb9, 0xb9, 0xd0, 0x00, 0x3c,
-	0x00, 0xaf, 0xbf, 0xb6, 0xcb, 0x00, 0x4b,
-	0x00, 0xa8, 0xb9, 0xb5, 0xcc, 0x00, 0x52
-};
-
-static const unsigned int ld9040_22_50[] = {
-	0x00, 0x13, 0xb2, 0xba, 0xd2, 0x00, 0x30,
-	0x00, 0xaf, 0xc0, 0xb8, 0xcd, 0x00, 0x3d,
-	0x00, 0xa8, 0xb8, 0xb7, 0xcd, 0x00, 0x44
-};
-
-struct ld9040_gamma {
-	unsigned int *gamma_22_table[MAX_GAMMA_LEVEL];
-};
-
-static struct ld9040_gamma gamma_table = {
-	.gamma_22_table[0] = (unsigned int *)&ld9040_22_50,
-	.gamma_22_table[1] = (unsigned int *)&ld9040_22_70,
-	.gamma_22_table[2] = (unsigned int *)&ld9040_22_80,
-	.gamma_22_table[3] = (unsigned int *)&ld9040_22_90,
-	.gamma_22_table[4] = (unsigned int *)&ld9040_22_100,
-	.gamma_22_table[5] = (unsigned int *)&ld9040_22_110,
-	.gamma_22_table[6] = (unsigned int *)&ld9040_22_120,
-	.gamma_22_table[7] = (unsigned int *)&ld9040_22_130,
-	.gamma_22_table[8] = (unsigned int *)&ld9040_22_140,
-	.gamma_22_table[9] = (unsigned int *)&ld9040_22_150,
-	.gamma_22_table[10] = (unsigned int *)&ld9040_22_160,
-	.gamma_22_table[11] = (unsigned int *)&ld9040_22_170,
-	.gamma_22_table[12] = (unsigned int *)&ld9040_22_180,
-	.gamma_22_table[13] = (unsigned int *)&ld9040_22_190,
-	.gamma_22_table[14] = (unsigned int *)&ld9040_22_200,
-	.gamma_22_table[15] = (unsigned int *)&ld9040_22_210,
-	.gamma_22_table[16] = (unsigned int *)&ld9040_22_220,
-	.gamma_22_table[17] = (unsigned int *)&ld9040_22_230,
-	.gamma_22_table[18] = (unsigned int *)&ld9040_22_240,
-	.gamma_22_table[19] = (unsigned int *)&ld9040_22_250,
-	.gamma_22_table[20] = (unsigned int *)&ld9040_22_260,
-	.gamma_22_table[21] = (unsigned int *)&ld9040_22_270,
-	.gamma_22_table[22] = (unsigned int *)&ld9040_22_280,
-	.gamma_22_table[23] = (unsigned int *)&ld9040_22_290,
-	.gamma_22_table[24] = (unsigned int *)&ld9040_22_300,
-};
-
-#endif
diff --git a/drivers/video/backlight/lm3639_bl.c b/drivers/video/backlight/lm3639_bl.c
index cd50df5807ea..086611c7bc03 100644
--- a/drivers/video/backlight/lm3639_bl.c
+++ b/drivers/video/backlight/lm3639_bl.c
@@ -400,10 +400,8 @@ static int lm3639_remove(struct i2c_client *client)
 
 	regmap_write(pchip->regmap, REG_ENABLE, 0x00);
 
-	if (&pchip->cdev_torch)
-		led_classdev_unregister(&pchip->cdev_torch);
-	if (&pchip->cdev_flash)
-		led_classdev_unregister(&pchip->cdev_flash);
+	led_classdev_unregister(&pchip->cdev_torch);
+	led_classdev_unregister(&pchip->cdev_flash);
 	if (pchip->bled)
 		device_remove_file(&(pchip->bled->dev), &dev_attr_bled_mode);
 	return 0;
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index bdfcc0a71db1..678b27063198 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -28,10 +28,8 @@
 struct pwm_bl_data {
 	struct pwm_device	*pwm;
 	struct device		*dev;
-	unsigned int		period;
 	unsigned int		lth_brightness;
 	unsigned int		*levels;
-	bool			enabled;
 	struct regulator	*power_supply;
 	struct gpio_desc	*enable_gpio;
 	unsigned int		scale;
@@ -46,31 +44,35 @@ struct pwm_bl_data {
 	void			(*exit)(struct device *);
 };
 
-static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness)
+static void pwm_backlight_power_on(struct pwm_bl_data *pb)
 {
+	struct pwm_state state;
 	int err;
 
-	if (pb->enabled)
+	pwm_get_state(pb->pwm, &state);
+	if (state.enabled)
 		return;
 
 	err = regulator_enable(pb->power_supply);
 	if (err < 0)
 		dev_err(pb->dev, "failed to enable power supply\n");
 
-	pwm_enable(pb->pwm);
+	state.enabled = true;
+	pwm_apply_state(pb->pwm, &state);
 
 	if (pb->post_pwm_on_delay)
 		msleep(pb->post_pwm_on_delay);
 
 	if (pb->enable_gpio)
 		gpiod_set_value_cansleep(pb->enable_gpio, 1);
-
-	pb->enabled = true;
 }
 
 static void pwm_backlight_power_off(struct pwm_bl_data *pb)
 {
-	if (!pb->enabled)
+	struct pwm_state state;
+
+	pwm_get_state(pb->pwm, &state);
+	if (!state.enabled)
 		return;
 
 	if (pb->enable_gpio)
@@ -79,24 +81,27 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
 	if (pb->pwm_off_delay)
 		msleep(pb->pwm_off_delay);
 
-	pwm_config(pb->pwm, 0, pb->period);
-	pwm_disable(pb->pwm);
+	state.enabled = false;
+	state.duty_cycle = 0;
+	pwm_apply_state(pb->pwm, &state);
 
 	regulator_disable(pb->power_supply);
-	pb->enabled = false;
 }
 
 static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness)
 {
 	unsigned int lth = pb->lth_brightness;
+	struct pwm_state state;
 	u64 duty_cycle;
 
+	pwm_get_state(pb->pwm, &state);
+
 	if (pb->levels)
 		duty_cycle = pb->levels[brightness];
 	else
 		duty_cycle = brightness;
 
-	duty_cycle *= pb->period - lth;
+	duty_cycle *= state.period - lth;
 	do_div(duty_cycle, pb->scale);
 
 	return duty_cycle + lth;
@@ -106,7 +111,7 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
 {
 	struct pwm_bl_data *pb = bl_get_data(bl);
 	int brightness = bl->props.brightness;
-	int duty_cycle;
+	struct pwm_state state;
 
 	if (bl->props.power != FB_BLANK_UNBLANK ||
 	    bl->props.fb_blank != FB_BLANK_UNBLANK ||
@@ -117,9 +122,10 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
 		brightness = pb->notify(pb->dev, brightness);
 
 	if (brightness > 0) {
-		duty_cycle = compute_duty_cycle(pb, brightness);
-		pwm_config(pb->pwm, duty_cycle, pb->period);
-		pwm_backlight_power_on(pb, brightness);
+		pwm_get_state(pb->pwm, &state);
+		state.duty_cycle = compute_duty_cycle(pb, brightness);
+		pwm_apply_state(pb->pwm, &state);
+		pwm_backlight_power_on(pb);
 	} else
 		pwm_backlight_power_off(pb);
 
@@ -447,7 +453,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	struct device_node *node = pdev->dev.of_node;
 	struct pwm_bl_data *pb;
 	struct pwm_state state;
-	struct pwm_args pargs;
 	unsigned int i;
 	int ret;
 
@@ -478,7 +483,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	pb->check_fb = data->check_fb;
 	pb->exit = data->exit;
 	pb->dev = &pdev->dev;
-	pb->enabled = false;
 	pb->post_pwm_on_delay = data->post_pwm_on_delay;
 	pb->pwm_off_delay = data->pwm_off_delay;
 
@@ -539,10 +543,26 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 
 	dev_dbg(&pdev->dev, "got pwm for backlight\n");
 
-	if (!data->levels) {
-		/* Get the PWM period (in nanoseconds) */
-		pwm_get_state(pb->pwm, &state);
+	/* Sync up PWM state. */
+	pwm_init_state(pb->pwm, &state);
 
+	/*
+	 * The DT case will set the pwm_period_ns field to 0 and store the
+	 * period, parsed from the DT, in the PWM device. For the non-DT case,
+	 * set the period from platform data if it has not already been set
+	 * via the PWM lookup table.
+	 */
+	if (!state.period && (data->pwm_period_ns > 0))
+		state.period = data->pwm_period_ns;
+
+	ret = pwm_apply_state(pb->pwm, &state);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to apply initial PWM state: %d\n",
+			ret);
+		goto err_alloc;
+	}
+
+	if (!data->levels) {
 		ret = pwm_backlight_brightness_default(&pdev->dev, data,
 						       state.period);
 		if (ret < 0) {
@@ -559,24 +579,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 		pb->levels = data->levels;
 	}
 
-	/*
-	 * FIXME: pwm_apply_args() should be removed when switching to
-	 * the atomic PWM API.
-	 */
-	pwm_apply_args(pb->pwm);
-
-	/*
-	 * The DT case will set the pwm_period_ns field to 0 and store the
-	 * period, parsed from the DT, in the PWM device. For the non-DT case,
-	 * set the period from platform data if it has not already been set
-	 * via the PWM lookup table.
-	 */
-	pwm_get_args(pb->pwm, &pargs);
-	pb->period = pargs.period;
-	if (!pb->period && (data->pwm_period_ns > 0))
-		pb->period = data->pwm_period_ns;
-
-	pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale);
+	pb->lth_brightness = data->lth_brightness * (state.period / pb->scale);
 
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c
deleted file mode 100644
index 3c4a22a3063a..000000000000
--- a/drivers/video/backlight/s6e63m0.c
+++ /dev/null
@@ -1,857 +0,0 @@
-/*
- * S6E63M0 AMOLED LCD panel driver.
- *
- * Author: InKi Dae  <inki.dae@samsung.com>
- *
- * 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.
- */
-
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/fb.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/lcd.h>
-#include <linux/module.h>
-#include <linux/spi/spi.h>
-#include <linux/wait.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
-
-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 {
-			msleep(wbuf[i+1]);
-		}
-		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_is_on(int power)
-{
-	return power <= FB_BLANK_NORMAL;
-}
-
-static int s6e63m0_power_on(struct s6e63m0 *lcd)
-{
-	int ret = 0;
-	struct lcd_platform_data *pd;
-	struct backlight_device *bd;
-
-	pd = lcd->lcd_pd;
-	bd = lcd->bd;
-
-	if (!pd->power_on) {
-		dev_err(lcd->dev, "power_on is NULL.\n");
-		return -EINVAL;
-	}
-
-	pd->power_on(lcd->ld, 1);
-	msleep(pd->power_on_delay);
-
-	if (!pd->reset) {
-		dev_err(lcd->dev, "reset is NULL.\n");
-		return -EINVAL;
-	}
-
-	pd->reset(lcd->ld);
-	msleep(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;
-	struct lcd_platform_data *pd;
-
-	pd = lcd->lcd_pd;
-
-	ret = s6e63m0_ldi_disable(lcd);
-	if (ret) {
-		dev_err(lcd->dev, "lcd setting failed.\n");
-		return -EIO;
-	}
-
-	msleep(pd->power_off_delay);
-
-	pd->power_on(lcd->ld, 0);
-
-	return 0;
-}
-
-static int s6e63m0_power(struct s6e63m0 *lcd, int power)
-{
-	int ret = 0;
-
-	if (s6e63m0_power_is_on(power) && !s6e63m0_power_is_on(lcd->power))
-		ret = s6e63m0_power_on(lcd);
-	else if (!s6e63m0_power_is_on(power) && s6e63m0_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_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  = {
-	.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 = kstrtouint(buf, 0, &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, "%u\n", lcd->gamma_table_count);
-	strcpy(buf, temp);
-
-	return strlen(buf);
-}
-static DEVICE_ATTR(gamma_table, 0444,
-		s6e63m0_sysfs_show_gamma_table, NULL);
-
-static int s6e63m0_probe(struct spi_device *spi)
-{
-	int ret = 0;
-	struct s6e63m0 *lcd = NULL;
-	struct lcd_device *ld = NULL;
-	struct backlight_device *bd = NULL;
-	struct backlight_properties props;
-
-	lcd = devm_kzalloc(&spi->dev, 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");
-		return ret;
-	}
-
-	lcd->spi = spi;
-	lcd->dev = &spi->dev;
-
-	lcd->lcd_pd = dev_get_platdata(&spi->dev);
-	if (!lcd->lcd_pd) {
-		dev_err(&spi->dev, "platform data is NULL.\n");
-		return -EINVAL;
-	}
-
-	ld = devm_lcd_device_register(&spi->dev, "s6e63m0", &spi->dev, lcd,
-				&s6e63m0_lcd_ops);
-	if (IS_ERR(ld))
-		return PTR_ERR(ld);
-
-	lcd->ld = ld;
-
-	memset(&props, 0, sizeof(struct backlight_properties));
-	props.type = BACKLIGHT_RAW;
-	props.max_brightness = MAX_BRIGHTNESS;
-
-	bd = devm_backlight_device_register(&spi->dev, "s6e63m0bl-bl",
-					&spi->dev, lcd, &s6e63m0_backlight_ops,
-					&props);
-	if (IS_ERR(bd))
-		return PTR_ERR(bd);
-
-	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;
-	}
-
-	spi_set_drvdata(spi, lcd);
-
-	dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n");
-
-	return 0;
-}
-
-static int s6e63m0_remove(struct spi_device *spi)
-{
-	struct s6e63m0 *lcd = spi_get_drvdata(spi);
-
-	s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
-	device_remove_file(&spi->dev, &dev_attr_gamma_table);
-	device_remove_file(&spi->dev, &dev_attr_gamma_mode);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int s6e63m0_suspend(struct device *dev)
-{
-	struct s6e63m0 *lcd = dev_get_drvdata(dev);
-
-	dev_dbg(dev, "lcd->power = %d\n", lcd->power);
-
-	/*
-	 * when lcd panel is suspend, lcd panel becomes off
-	 * regardless of status.
-	 */
-	return s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
-}
-
-static int s6e63m0_resume(struct device *dev)
-{
-	struct s6e63m0 *lcd = dev_get_drvdata(dev);
-
-	lcd->power = FB_BLANK_POWERDOWN;
-
-	return s6e63m0_power(lcd, FB_BLANK_UNBLANK);
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(s6e63m0_pm_ops, s6e63m0_suspend, s6e63m0_resume);
-
-/* Power down all displays on reboot, poweroff or halt. */
-static void s6e63m0_shutdown(struct spi_device *spi)
-{
-	struct s6e63m0 *lcd = spi_get_drvdata(spi);
-
-	s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
-}
-
-static struct spi_driver s6e63m0_driver = {
-	.driver = {
-		.name	= "s6e63m0",
-		.pm	= &s6e63m0_pm_ops,
-	},
-	.probe		= s6e63m0_probe,
-	.remove		= s6e63m0_remove,
-	.shutdown	= s6e63m0_shutdown,
-};
-
-module_spi_driver(s6e63m0_driver);
-
-MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
-MODULE_DESCRIPTION("S6E63M0 LCD Driver");
-MODULE_LICENSE("GPL");
-
diff --git a/drivers/video/backlight/s6e63m0_gamma.h b/drivers/video/backlight/s6e63m0_gamma.h
deleted file mode 100644
index 2c44bdb0696b..000000000000
--- a/drivers/video/backlight/s6e63m0_gamma.h
+++ /dev/null
@@ -1,266 +0,0 @@
-/* linux/drivers/video/samsung/s6e63m0_brightness.h
- *
- * Gamma level definitions.
- *
- * Copyright (c) 2009 Samsung Electronics
- * InKi Dae <inki.dae@samsung.com>
- *
- * 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
-