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Commit 7b5ab643 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by Sekhar Nori
Browse files

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



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: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent 5f9e832c

arch/arm/mach-davinci/board-da850-evm.c

+28 −12
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/platform_data/ti-aemif.h>

#include <linux/platform_data/spi-davinci.h>

#include <linux/platform_data/uio_pruss.h>

#include <linux/property.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/tps6507x.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)

{

	/* lcd backlight */

	gpio_set_value(DA850_LCD_BL_PIN, val);



	/* lcd power */

	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)

{

	struct platform_device *backlight;

	int status;



	status = gpio_request(DA850_LCD_BL_PIN, "lcd bl");

	if (status < 0)

		return status;

	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) {

		gpio_free(DA850_LCD_BL_PIN);

	if (status < 0)

		return status;

	}



	gpio_direction_output(DA850_LCD_BL_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);



	/* Switch on panel power and backlight */

	/* Switch on panel power */

	da850_panel_power_ctrl(1);



	return 0;