[u-boot.git] / drivers / video / backlight_gpio.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
 * Author: Patrick Delaunay <[email protected]>
 */

#include <common.h>
#include <dm.h>
#include <backlight.h>
#include <asm/gpio.h>

struct gpio_backlight_priv {
	struct gpio_desc gpio;
	bool def_value;
};

static int gpio_backlight_enable(struct udevice *dev)
{
	struct gpio_backlight_priv *priv = dev_get_priv(dev);

	dm_gpio_set_value(&priv->gpio, 1);

	return 0;
}

static int gpio_backlight_ofdata_to_platdata(struct udevice *dev)
{
	struct gpio_backlight_priv *priv = dev_get_priv(dev);
	int ret;

	ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio,
				   GPIOD_IS_OUT);
	if (ret) {
		debug("%s: Warning: cannot get GPIO: ret=%d\n",
		      __func__, ret);
		return ret;
	}

	priv->def_value = dev_read_bool(dev, "default-on");

	return 0;
}

static int gpio_backlight_probe(struct udevice *dev)
{
	struct gpio_backlight_priv *priv = dev_get_priv(dev);

	if (priv->def_value)
		gpio_backlight_enable(dev);

	return 0;
}

static const struct backlight_ops gpio_backlight_ops = {
	.enable	= gpio_backlight_enable,
};

static const struct udevice_id gpio_backlight_ids[] = {
	{ .compatible = "gpio-backlight" },
	{ }
};

U_BOOT_DRIVER(gpio_backlight) = {
	.name	= "gpio_backlight",
	.id	= UCLASS_PANEL_BACKLIGHT,
	.of_match = gpio_backlight_ids,
	.ops	= &gpio_backlight_ops,
	.ofdata_to_platdata	= gpio_backlight_ofdata_to_platdata,
	.probe		= gpio_backlight_probe,
	.priv_auto_alloc_size	= sizeof(struct gpio_backlight_priv),
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
5b6a6a91 PD	2	/*
	3	* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
	4	* Author: Patrick Delaunay <[email protected]>
5b6a6a91 PD	5	*/
	6
	7	#include <common.h>
	8	#include <dm.h>
	9	#include <backlight.h>
	10	#include <asm/gpio.h>
	11
5b6a6a91 PD	12	struct gpio_backlight_priv {
	13	struct gpio_desc gpio;
	14	bool def_value;
	15	};
	16
	17	static int gpio_backlight_enable(struct udevice *dev)
	18	{
	19	struct gpio_backlight_priv *priv = dev_get_priv(dev);
	20
	21	dm_gpio_set_value(&priv->gpio, 1);
	22
	23	return 0;
	24	}
	25
	26	static int gpio_backlight_ofdata_to_platdata(struct udevice *dev)
	27	{
	28	struct gpio_backlight_priv *priv = dev_get_priv(dev);
	29	int ret;
	30
	31	ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio,
	32	GPIOD_IS_OUT);
	33	if (ret) {
	34	debug("%s: Warning: cannot get GPIO: ret=%d\n",
	35	__func__, ret);
	36	return ret;
	37	}
	38
	39	priv->def_value = dev_read_bool(dev, "default-on");
	40
	41	return 0;
	42	}
	43
	44	static int gpio_backlight_probe(struct udevice *dev)
	45	{
	46	struct gpio_backlight_priv *priv = dev_get_priv(dev);
	47
	48	if (priv->def_value)
	49	gpio_backlight_enable(dev);
	50
	51	return 0;
	52	}
	53
	54	static const struct backlight_ops gpio_backlight_ops = {
	55	.enable = gpio_backlight_enable,
	56	};
	57
	58	static const struct udevice_id gpio_backlight_ids[] = {
	59	{ .compatible = "gpio-backlight" },
	60	{ }
	61	};
	62
	63	U_BOOT_DRIVER(gpio_backlight) = {
	64	.name = "gpio_backlight",
	65	.id = UCLASS_PANEL_BACKLIGHT,
	66	.of_match = gpio_backlight_ids,
	67	.ops = &gpio_backlight_ops,
	68	.ofdata_to_platdata = gpio_backlight_ofdata_to_platdata,
	69	.probe = gpio_backlight_probe,
	70	.priv_auto_alloc_size = sizeof(struct gpio_backlight_priv),
	71	};