Message-Id: <20180927165541.11903-2-krzk@kernel.org>
Date:   Thu, 27 Sep 2018 18:55:41 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Aishwarya Pant <aishpant@...il.com>,
        Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Inki Dae <inki.dae@...sung.com>
Subject: [RESEND v2 2/2] backlight: Remove ld9040 driver

The driver for LD9040 AMOLED LCD panel was superseded with DRM driver
panel-samsung-ld9040.c.  It does not support DeviceTree and respective
possible user (Exynos4210 Universal C210) is DeviceTree-only and uses
DRM version of driver.

Suggested-by: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: Inki Dae <inki.dae@...sung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Acked-by: Jingoo Han <jingoohan1@...il.com>
Acked-by: Daniel Thompson <daniel.thompson@...aro.org>

---

Changes since v1:
1. Add Jingoo's and Daniel's acks.
---
 drivers/video/backlight/Kconfig        |   8 -
 drivers/video/backlight/Makefile       |   1 -
 drivers/video/backlight/ld9040.c       | 811 -------------------------
 drivers/video/backlight/ld9040_gamma.h | 202 ------
 4 files changed, 1022 deletions(-)
 delete mode 100644 drivers/video/backlight/ld9040.c
 delete mode 100644 drivers/video/backlight/ld9040_gamma.h

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 2373c3cec0c3..71ee978c848f 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_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 c7a46392a76f..63c507c07437 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -9,7 +9,6 @@ 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
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@...sung.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@...sung.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@...sung.com>
- * Donghwa Lee <dh09.lee@...sung.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
-- 
2.17.1

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