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ARM: davinci: da850-evm: model the backlight GPIO as an actual device

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Instead of enabling the panel backlight in a callback defined in board
file using deprecated legacy GPIO API calls, model the line as a GPIO
backlight device.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Bartosz Golaszewski 2019-07-22 15:44:17 +02:00 committed by Sekhar Nori
parent 5f9e832c13
commit 7b5ab64379
1 changed files with 29 additions and 13 deletions
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42
arch/arm/mach-davinci/board-da850-evm.c
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@ -36,6 +36,7 @@
#include <linux/platform_data/ti-aemif.h> #include <linux/platform_data/ti-aemif.h>
#include <linux/platform_data/spi-davinci.h> #include <linux/platform_data/spi-davinci.h>
#include <linux/platform_data/uio_pruss.h> #include <linux/platform_data/uio_pruss.h>
#include <linux/property.h>
#include <linux/regulator/machine.h> #include <linux/regulator/machine.h>
#include <linux/regulator/tps6507x.h> #include <linux/regulator/tps6507x.h>
#include <linux/regulator/fixed.h> #include <linux/regulator/fixed.h>
@ -804,34 +805,49 @@ static const short da850_evm_mmcsd0_pins[] __initconst = {
static void da850_panel_power_ctrl(int val) static void da850_panel_power_ctrl(int val)
{ {
/* lcd backlight */
gpio_set_value(DA850_LCD_BL_PIN, val);
/* lcd power */ /* lcd power */
gpio_set_value(DA850_LCD_PWR_PIN, val); gpio_set_value(DA850_LCD_PWR_PIN, val);
} }
static struct property_entry da850_lcd_backlight_props[] = {
PROPERTY_ENTRY_BOOL("default-on"),
{ }
};
static struct gpiod_lookup_table da850_lcd_backlight_gpio_table = {
.dev_id = "gpio-backlight",
.table = {
GPIO_LOOKUP("davinci_gpio", DA850_LCD_BL_PIN, NULL, 0),
{ }
},
};
static const struct platform_device_info da850_lcd_backlight_info = {
.name = "gpio-backlight",
.id = PLATFORM_DEVID_NONE,
.properties = da850_lcd_backlight_props,
};
static int da850_lcd_hw_init(void) static int da850_lcd_hw_init(void)
{ {
struct platform_device *backlight;
int status; int status;
status = gpio_request(DA850_LCD_BL_PIN, "lcd bl"); gpiod_add_lookup_table(&da850_lcd_backlight_gpio_table);
backlight = platform_device_register_full(&da850_lcd_backlight_info);
if (IS_ERR(backlight))
return PTR_ERR(backlight);
status = gpio_request(DA850_LCD_PWR_PIN, "lcd pwr");
if (status < 0) if (status < 0)
return status; return status;
status = gpio_request(DA850_LCD_PWR_PIN, "lcd pwr");
if (status < 0) {
gpio_free(DA850_LCD_BL_PIN);
return status;
}
gpio_direction_output(DA850_LCD_BL_PIN, 0);
gpio_direction_output(DA850_LCD_PWR_PIN, 0); gpio_direction_output(DA850_LCD_PWR_PIN, 0);
/* Switch off panel power and backlight */ /* Switch off panel power */
da850_panel_power_ctrl(0); da850_panel_power_ctrl(0);
/* Switch on panel power and backlight */ /* Switch on panel power */
da850_panel_power_ctrl(1); da850_panel_power_ctrl(1);
return 0; return 0;