[PATCH 1/2] backlight: Remove s6e63m0 driver

* [PATCH 1/2] backlight: Remove s6e63m0 driver
@ 2018-04-30 17:29 ` Krzysztof Kozlowski
  0 siblings, 0 replies; 18+ messages in thread
From: Krzysztof Kozlowski @ 2018-04-30 17:29 UTC (permalink / raw)
  To: Lee Jones, Daniel Thompson, Jingoo Han,
	Bartlomiej Zolnierkiewicz, linux-kernel, dri-devel, linux-fbdev
  Cc: Krzysztof Kozlowski, Marek Szyprowski, Inki Dae

The driver for S6E63M0 AMOLED LCD panel is not used.  It does not
support DeviceTree and respective possible users (S5Pv210 Aquila and
Goni boards) are DeviceTree-only.

Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/video/backlight/Kconfig         |   8 -
 drivers/video/backlight/Makefile        |   1 -
 drivers/video/backlight/s6e63m0.c       | 857 --------------------------------
 drivers/video/backlight/s6e63m0_gamma.h | 266 ----------
 4 files changed, 1132 deletions(-)
 delete mode 100644 drivers/video/backlight/s6e63m0.c
 delete mode 100644 drivers/video/backlight/s6e63m0_gamma.h

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 5d2d0d7e8100..be0c130b6597 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -111,14 +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
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 19da71d518bf..8773fdd64e99 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -14,7 +14,6 @@ obj-$(CONFIG_LCD_LMS283GF05)		+= lms283gf05.o
 obj-$(CONFIG_LCD_LMS501KF03)		+= lms501kf03.o
 obj-$(CONFIG_LCD_LTV350QV)		+= ltv350qv.o
 obj-$(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/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
-
-- 
2.14.1

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