[mirror_ubuntu-jammy-kernel.git] / drivers / leds / leds-s3c24xx.c

// SPDX-License-Identifier: GPL-2.0-only
/* drivers/leds/leds-s3c24xx.c
 *
 * (c) 2006 Simtec Electronics
 *	http://armlinux.simtec.co.uk/
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * S3C24XX - LEDs GPIO driver
*/

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_data/leds-s3c24xx.h>

/* our context */

struct s3c24xx_gpio_led {
	struct led_classdev		 cdev;
	struct s3c24xx_led_platdata	*pdata;
	struct gpio_desc		*gpiod;
};

static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
{
	return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
}

static void s3c24xx_led_set(struct led_classdev *led_cdev,
			    enum led_brightness value)
{
	struct s3c24xx_gpio_led *led = to_gpio(led_cdev);

	gpiod_set_value(led->gpiod, !!value);
}

static int s3c24xx_led_probe(struct platform_device *dev)
{
	struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);
	struct s3c24xx_gpio_led *led;
	int ret;

	led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
			   GFP_KERNEL);
	if (!led)
		return -ENOMEM;

	led->cdev.brightness_set = s3c24xx_led_set;
	led->cdev.default_trigger = pdata->def_trigger;
	led->cdev.name = pdata->name;
	led->cdev.flags |= LED_CORE_SUSPENDRESUME;

	led->pdata = pdata;

	/* Default to off */
	led->gpiod = devm_gpiod_get(&dev->dev, NULL, GPIOD_OUT_LOW);
	if (IS_ERR(led->gpiod))
		return PTR_ERR(led->gpiod);

	/* register our new led device */
	ret = devm_led_classdev_register(&dev->dev, &led->cdev);
	if (ret < 0)
		dev_err(&dev->dev, "led_classdev_register failed\n");

	return ret;
}

static struct platform_driver s3c24xx_led_driver = {
	.probe		= s3c24xx_led_probe,
	.driver		= {
		.name		= "s3c24xx_led",
	},
};

module_platform_driver(s3c24xx_led_driver);

MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C24XX LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s3c24xx_led");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
54bdc470 BD	2	/* drivers/leds/leds-s3c24xx.c
	3	*
	4	* (c) 2006 Simtec Electronics
	5	* http://armlinux.simtec.co.uk/
	6	* Ben Dooks <ben@simtec.co.uk>
	7	*
	8	* S3C24XX - LEDs GPIO driver
54bdc470 BD	9	*/
54bdc470 BD	10
54bdc470	11	#include <linux/kernel.h>
54bdc470 BD	12	#include <linux/platform_device.h>
54bdc470 BD	13	#include <linux/leds.h>
f7f611f2	14	#include <linux/gpio/consumer.h>
5a0e3ad6	15	#include <linux/slab.h>
54f4dedb	16	#include <linux/module.h>
3cb6f44a	17	#include <linux/platform_data/leds-s3c24xx.h>
54bdc470	18
54bdc470 BD	19	/* our context */
	20
	21	struct s3c24xx_gpio_led {
	22	struct led_classdev cdev;
	23	struct s3c24xx_led_platdata *pdata;
f7f611f2	24	struct gpio_desc *gpiod;
54bdc470 BD	25	};
54bdc470 BD	26
54bdc470 BD	27	static inline struct s3c24xx_gpio_led to_gpio(struct led_classdev led_cdev)
	28	{
	29	return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
	30	}
	31
	32	static void s3c24xx_led_set(struct led_classdev *led_cdev,
	33	enum led_brightness value)
	34	{
	35	struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
54bdc470	36
f7f611f2	37	gpiod_set_value(led->gpiod, !!value);
54bdc470 BD	38	}
54bdc470 BD	39
54bdc470 BD	40	static int s3c24xx_led_probe(struct platform_device *dev)
54bdc470 BD	41	{
87aae1ea	42	struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);
54bdc470 BD	43	struct s3c24xx_gpio_led *led;
	44	int ret;
	45
7e97b581 SN	46	led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
7e97b581 SN	47	GFP_KERNEL);
0c9a03b6	48	if (!led)
54bdc470	49	return -ENOMEM;
54bdc470	50
54bdc470 BD	51	led->cdev.brightness_set = s3c24xx_led_set;
	52	led->cdev.default_trigger = pdata->def_trigger;
	53	led->cdev.name = pdata->name;
859cb7f2	54	led->cdev.flags \|= LED_CORE_SUSPENDRESUME;
54bdc470 BD	55
	56	led->pdata = pdata;
	57
f7f611f2 LW	58	/* Default to off */
	59	led->gpiod = devm_gpiod_get(&dev->dev, NULL, GPIOD_OUT_LOW);
	60	if (IS_ERR(led->gpiod))
	61	return PTR_ERR(led->gpiod);
54bdc470 BD	62
54bdc470 BD	63	/* register our new led device */
48a7032b	64	ret = devm_led_classdev_register(&dev->dev, &led->cdev);
7e97b581	65	if (ret < 0)
54bdc470	66	dev_err(&dev->dev, "led_classdev_register failed\n");
54bdc470	67
1522d02e	68	return ret;
54bdc470 BD	69	}
54bdc470 BD	70
54bdc470 BD	71	static struct platform_driver s3c24xx_led_driver = {
54bdc470 BD	72	.probe = s3c24xx_led_probe,
54bdc470 BD	73	.driver = {
54bdc470 BD	74	.name = "s3c24xx_led",
54bdc470 BD	75	},
	76	};
	77
892a8843	78	module_platform_driver(s3c24xx_led_driver);
54bdc470 BD	79
	80	MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
	81	MODULE_DESCRIPTION("S3C24XX LED driver");
	82	MODULE_LICENSE("GPL");
3c4ded97	83	MODULE_ALIAS("platform:s3c24xx_led");