cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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leds-s3c24xx.c (2020B)

      1// SPDX-License-Identifier: GPL-2.0-only
      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
      9*/
     10
     11#include <linux/kernel.h>
     12#include <linux/platform_device.h>
     13#include <linux/leds.h>
     14#include <linux/gpio/consumer.h>
     15#include <linux/slab.h>
     16#include <linux/module.h>
     17#include <linux/platform_data/leds-s3c24xx.h>
     18
     19/* our context */
     20
     21struct s3c24xx_gpio_led {
     22	struct led_classdev		 cdev;
     23	struct s3c24xx_led_platdata	*pdata;
     24	struct gpio_desc		*gpiod;
     25};
     26
     27static 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
     32static 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);
     36
     37	gpiod_set_value(led->gpiod, !!value);
     38}
     39
     40static int s3c24xx_led_probe(struct platform_device *dev)
     41{
     42	struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);
     43	struct s3c24xx_gpio_led *led;
     44	int ret;
     45
     46	led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
     47			   GFP_KERNEL);
     48	if (!led)
     49		return -ENOMEM;
     50
     51	led->cdev.brightness_set = s3c24xx_led_set;
     52	led->cdev.default_trigger = pdata->def_trigger;
     53	led->cdev.name = pdata->name;
     54	led->cdev.flags |= LED_CORE_SUSPENDRESUME;
     55
     56	led->pdata = pdata;
     57
     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);
     62
     63	/* register our new led device */
     64	ret = devm_led_classdev_register(&dev->dev, &led->cdev);
     65	if (ret < 0)
     66		dev_err(&dev->dev, "led_classdev_register failed\n");
     67
     68	return ret;
     69}
     70
     71static struct platform_driver s3c24xx_led_driver = {
     72	.probe		= s3c24xx_led_probe,
     73	.driver		= {
     74		.name		= "s3c24xx_led",
     75	},
     76};
     77
     78module_platform_driver(s3c24xx_led_driver);
     79
     80MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
     81MODULE_DESCRIPTION("S3C24XX LED driver");
     82MODULE_LICENSE("GPL");
     83MODULE_ALIAS("platform:s3c24xx_led");