v4.19.13 snapshot.
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c
new file mode 100644
index 0000000..3c4a22a
--- /dev/null
+++ b/drivers/video/backlight/s6e63m0.c
@@ -0,0 +1,857 @@
+/*
+ * 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");
+