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path: root/drivers/video/backlight/l4f00242t03.c
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Diffstat (limited to 'drivers/video/backlight/l4f00242t03.c')
-rw-r--r--drivers/video/backlight/l4f00242t03.c116
1 files changed, 50 insertions, 66 deletions
diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c
index e6054e2492c5..d04d2256306e 100644
--- a/drivers/video/backlight/l4f00242t03.c
+++ b/drivers/video/backlight/l4f00242t03.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* l4f00242t03.c -- support for Epson L4F00242T03 LCD
*
@@ -5,10 +6,6 @@
*
* Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
* Inspired by Marek Vasut work in l4f00242t03.c
- *
- * 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -17,13 +14,11 @@
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/module.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/lcd.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
-
#include <linux/spi/spi.h>
-#include <linux/spi/l4f00242t03.h>
struct l4f00242t03_priv {
struct spi_device *spi;
@@ -31,16 +26,18 @@ struct l4f00242t03_priv {
int lcd_state;
struct regulator *io_reg;
struct regulator *core_reg;
+ struct gpio_desc *reset;
+ struct gpio_desc *enable;
};
-static void l4f00242t03_reset(unsigned int gpio)
+static void l4f00242t03_reset(struct gpio_desc *gpiod)
{
pr_debug("l4f00242t03_reset.\n");
- gpio_set_value(gpio, 1);
+ gpiod_set_value(gpiod, 1);
mdelay(100);
- gpio_set_value(gpio, 0);
+ gpiod_set_value(gpiod, 0);
mdelay(10); /* tRES >= 100us */
- gpio_set_value(gpio, 1);
+ gpiod_set_value(gpiod, 1);
mdelay(20);
}
@@ -48,7 +45,6 @@ static void l4f00242t03_reset(unsigned int gpio)
static void l4f00242t03_lcd_init(struct spi_device *spi)
{
- struct l4f00242t03_pdata *pdata = dev_get_platdata(&spi->dev);
struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
const u16 cmd[] = { 0x36, param(0), 0x3A, param(0x60) };
int ret;
@@ -79,21 +75,20 @@ static void l4f00242t03_lcd_init(struct spi_device *spi)
return;
}
- l4f00242t03_reset(pdata->reset_gpio);
+ l4f00242t03_reset(priv->reset);
- gpio_set_value(pdata->data_enable_gpio, 1);
+ gpiod_set_value(priv->enable, 1);
msleep(60);
spi_write(spi, (const u8 *)cmd, ARRAY_SIZE(cmd) * sizeof(u16));
}
static void l4f00242t03_lcd_powerdown(struct spi_device *spi)
{
- struct l4f00242t03_pdata *pdata = dev_get_platdata(&spi->dev);
struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
dev_dbg(&spi->dev, "Powering down LCD\n");
- gpio_set_value(pdata->data_enable_gpio, 0);
+ gpiod_set_value(priv->enable, 0);
regulator_disable(priv->io_reg);
regulator_disable(priv->core_reg);
@@ -117,40 +112,40 @@ static int l4f00242t03_lcd_power_set(struct lcd_device *ld, int power)
const u16 slpin = 0x10;
const u16 disoff = 0x28;
- if (power <= FB_BLANK_NORMAL) {
- if (priv->lcd_state <= FB_BLANK_NORMAL) {
+ if (power <= LCD_POWER_REDUCED) {
+ if (priv->lcd_state <= LCD_POWER_REDUCED) {
/* Do nothing, the LCD is running */
- } else if (priv->lcd_state < FB_BLANK_POWERDOWN) {
+ } else if (priv->lcd_state < LCD_POWER_OFF) {
dev_dbg(&spi->dev, "Resuming LCD\n");
spi_write(spi, (const u8 *)&slpout, sizeof(u16));
msleep(60);
spi_write(spi, (const u8 *)&dison, sizeof(u16));
} else {
- /* priv->lcd_state == FB_BLANK_POWERDOWN */
+ /* priv->lcd_state == LCD_POWER_OFF */
l4f00242t03_lcd_init(spi);
- priv->lcd_state = FB_BLANK_VSYNC_SUSPEND;
+ priv->lcd_state = LCD_POWER_REDUCED_VSYNC_SUSPEND;
l4f00242t03_lcd_power_set(priv->ld, power);
}
- } else if (power < FB_BLANK_POWERDOWN) {
- if (priv->lcd_state <= FB_BLANK_NORMAL) {
+ } else if (power < LCD_POWER_OFF) {
+ if (priv->lcd_state <= LCD_POWER_REDUCED) {
/* Send the display in standby */
dev_dbg(&spi->dev, "Standby the LCD\n");
spi_write(spi, (const u8 *)&disoff, sizeof(u16));
msleep(60);
spi_write(spi, (const u8 *)&slpin, sizeof(u16));
- } else if (priv->lcd_state < FB_BLANK_POWERDOWN) {
+ } else if (priv->lcd_state < LCD_POWER_OFF) {
/* Do nothing, the LCD is already in standby */
} else {
- /* priv->lcd_state == FB_BLANK_POWERDOWN */
+ /* priv->lcd_state == LCD_POWER_OFF */
l4f00242t03_lcd_init(spi);
- priv->lcd_state = FB_BLANK_UNBLANK;
+ priv->lcd_state = LCD_POWER_ON;
l4f00242t03_lcd_power_set(ld, power);
}
} else {
- /* power == FB_BLANK_POWERDOWN */
- if (priv->lcd_state != FB_BLANK_POWERDOWN) {
+ /* power == LCD_POWER_OFF */
+ if (priv->lcd_state != LCD_POWER_OFF) {
/* Clear the screen before shutting down */
spi_write(spi, (const u8 *)&disoff, sizeof(u16));
msleep(60);
@@ -163,7 +158,7 @@ static int l4f00242t03_lcd_power_set(struct lcd_device *ld, int power)
return 0;
}
-static struct lcd_ops l4f_ops = {
+static const struct lcd_ops l4f_ops = {
.set_power = l4f00242t03_lcd_power_set,
.get_power = l4f00242t03_lcd_power_get,
};
@@ -171,14 +166,8 @@ static struct lcd_ops l4f_ops = {
static int l4f00242t03_probe(struct spi_device *spi)
{
struct l4f00242t03_priv *priv;
- struct l4f00242t03_pdata *pdata = dev_get_platdata(&spi->dev);
int ret;
- if (pdata == NULL) {
- dev_err(&spi->dev, "Uninitialized platform data.\n");
- return -EINVAL;
- }
-
priv = devm_kzalloc(&spi->dev, sizeof(struct l4f00242t03_priv),
GFP_KERNEL);
if (priv == NULL)
@@ -186,39 +175,35 @@ static int l4f00242t03_probe(struct spi_device *spi)
spi_set_drvdata(spi, priv);
spi->bits_per_word = 9;
- spi_setup(spi);
+ ret = spi_setup(spi);
+ if (ret < 0)
+ return dev_err_probe(&spi->dev, ret, "Unable to setup spi.\n");
priv->spi = spi;
- ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio,
- GPIOF_OUT_INIT_HIGH, "lcd l4f00242t03 reset");
- if (ret) {
- dev_err(&spi->dev,
- "Unable to get the lcd l4f00242t03 reset gpio.\n");
- return ret;
- }
+ priv->reset = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->reset))
+ return dev_err_probe(&spi->dev, PTR_ERR(priv->reset),
+ "Unable to get the lcd l4f00242t03 reset gpio.\n");
+ gpiod_set_consumer_name(priv->reset, "lcd l4f00242t03 reset");
- ret = devm_gpio_request_one(&spi->dev, pdata->data_enable_gpio,
- GPIOF_OUT_INIT_LOW, "lcd l4f00242t03 data enable");
- if (ret) {
- dev_err(&spi->dev,
- "Unable to get the lcd l4f00242t03 data en gpio.\n");
- return ret;
- }
+ priv->enable = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable))
+ return dev_err_probe(&spi->dev, PTR_ERR(priv->enable),
+ "Unable to get the lcd l4f00242t03 data en gpio.\n");
+ gpiod_set_consumer_name(priv->enable, "lcd l4f00242t03 data enable");
priv->io_reg = devm_regulator_get(&spi->dev, "vdd");
- if (IS_ERR(priv->io_reg)) {
- dev_err(&spi->dev, "%s: Unable to get the IO regulator\n",
- __func__);
- return PTR_ERR(priv->io_reg);
- }
+ if (IS_ERR(priv->io_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(priv->io_reg),
+ "%s: Unable to get the IO regulator\n",
+ __func__);
priv->core_reg = devm_regulator_get(&spi->dev, "vcore");
- if (IS_ERR(priv->core_reg)) {
- dev_err(&spi->dev, "%s: Unable to get the core regulator\n",
- __func__);
- return PTR_ERR(priv->core_reg);
- }
+ if (IS_ERR(priv->core_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(priv->core_reg),
+ "%s: Unable to get the core regulator\n",
+ __func__);
priv->ld = devm_lcd_device_register(&spi->dev, "l4f00242t03", &spi->dev,
priv, &l4f_ops);
@@ -227,20 +212,19 @@ static int l4f00242t03_probe(struct spi_device *spi)
/* Init the LCD */
l4f00242t03_lcd_init(spi);
- priv->lcd_state = FB_BLANK_VSYNC_SUSPEND;
- l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_UNBLANK);
+ priv->lcd_state = LCD_POWER_REDUCED_VSYNC_SUSPEND;
+ l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_ON);
dev_info(&spi->dev, "Epson l4f00242t03 lcd probed.\n");
return 0;
}
-static int l4f00242t03_remove(struct spi_device *spi)
+static void l4f00242t03_remove(struct spi_device *spi)
{
struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
- l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN);
- return 0;
+ l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_OFF);
}
static void l4f00242t03_shutdown(struct spi_device *spi)
@@ -248,7 +232,7 @@ static void l4f00242t03_shutdown(struct spi_device *spi)
struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
if (priv)
- l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN);
+ l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_OFF);
}
generated by cgit (git 2.34.1) at 2025-12-28 02:35:23 +0000