1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /* drivers/leds/leds-s3c24xx.c
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * (c) 2006 Simtec Electronics
5*4882a593Smuzhiyun * http://armlinux.simtec.co.uk/
6*4882a593Smuzhiyun * Ben Dooks <ben@simtec.co.uk>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * S3C24XX - LEDs GPIO driver
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/kernel.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/leds.h>
14*4882a593Smuzhiyun #include <linux/gpio/consumer.h>
15*4882a593Smuzhiyun #include <linux/slab.h>
16*4882a593Smuzhiyun #include <linux/module.h>
17*4882a593Smuzhiyun #include <linux/platform_data/leds-s3c24xx.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /* our context */
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct s3c24xx_gpio_led {
22*4882a593Smuzhiyun struct led_classdev cdev;
23*4882a593Smuzhiyun struct s3c24xx_led_platdata *pdata;
24*4882a593Smuzhiyun struct gpio_desc *gpiod;
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
to_gpio(struct led_classdev * led_cdev)27*4882a593Smuzhiyun static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
s3c24xx_led_set(struct led_classdev * led_cdev,enum led_brightness value)32*4882a593Smuzhiyun static void s3c24xx_led_set(struct led_classdev *led_cdev,
33*4882a593Smuzhiyun enum led_brightness value)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun gpiod_set_value(led->gpiod, !!value);
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
s3c24xx_led_probe(struct platform_device * dev)40*4882a593Smuzhiyun static int s3c24xx_led_probe(struct platform_device *dev)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);
43*4882a593Smuzhiyun struct s3c24xx_gpio_led *led;
44*4882a593Smuzhiyun int ret;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
47*4882a593Smuzhiyun GFP_KERNEL);
48*4882a593Smuzhiyun if (!led)
49*4882a593Smuzhiyun return -ENOMEM;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun led->cdev.brightness_set = s3c24xx_led_set;
52*4882a593Smuzhiyun led->cdev.default_trigger = pdata->def_trigger;
53*4882a593Smuzhiyun led->cdev.name = pdata->name;
54*4882a593Smuzhiyun led->cdev.flags |= LED_CORE_SUSPENDRESUME;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun led->pdata = pdata;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun /* Default to off */
59*4882a593Smuzhiyun led->gpiod = devm_gpiod_get(&dev->dev, NULL, GPIOD_OUT_LOW);
60*4882a593Smuzhiyun if (IS_ERR(led->gpiod))
61*4882a593Smuzhiyun return PTR_ERR(led->gpiod);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun /* register our new led device */
64*4882a593Smuzhiyun ret = devm_led_classdev_register(&dev->dev, &led->cdev);
65*4882a593Smuzhiyun if (ret < 0)
66*4882a593Smuzhiyun dev_err(&dev->dev, "led_classdev_register failed\n");
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun return ret;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun static struct platform_driver s3c24xx_led_driver = {
72*4882a593Smuzhiyun .probe = s3c24xx_led_probe,
73*4882a593Smuzhiyun .driver = {
74*4882a593Smuzhiyun .name = "s3c24xx_led",
75*4882a593Smuzhiyun },
76*4882a593Smuzhiyun };
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun module_platform_driver(s3c24xx_led_driver);
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
81*4882a593Smuzhiyun MODULE_DESCRIPTION("S3C24XX LED driver");
82*4882a593Smuzhiyun MODULE_LICENSE("GPL");
83*4882a593Smuzhiyun MODULE_ALIAS("platform:s3c24xx_led");
84