Message-ID: <20180501124304.7zxkvyqug7zjmnfx@holly.lan>
Date:   Tue, 1 May 2018 13:43:04 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Inki Dae <inki.dae@...sung.com>
Subject: Re: [PATCH 2/2] backlight: Remove ld9040 driver

On Mon, Apr 30, 2018 at 07:29:45PM +0200, Krzysztof Kozlowski wrote:
> The driver for LD9040 AMOLED LCD panel was superseded with DRM driver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: Daniel Thompson <daniel.thompson@...aro.org>

> ---
>  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 be0c130b6597..2202daf2ab4f 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 8773fdd64e99..0b327c0cb750 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
> -- 
> 2.14.1
> 

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