mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 20:00:53 +07:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
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.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_data/leds-s3c24xx.h>
|
|
|
|
#include <mach/regs-gpio.h>
|
|
#include <plat/gpio-cfg.h>
|
|
|
|
/* our context */
|
|
|
|
struct s3c24xx_gpio_led {
|
|
struct led_classdev cdev;
|
|
struct s3c24xx_led_platdata *pdata;
|
|
};
|
|
|
|
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);
|
|
struct s3c24xx_led_platdata *pd = led->pdata;
|
|
int state = (value ? 1 : 0) ^ (pd->flags & S3C24XX_LEDF_ACTLOW);
|
|
|
|
/* there will be a short delay between setting the output and
|
|
* going from output to input when using tristate. */
|
|
|
|
gpio_set_value(pd->gpio, state);
|
|
|
|
if (pd->flags & S3C24XX_LEDF_TRISTATE) {
|
|
if (value)
|
|
gpio_direction_output(pd->gpio, state);
|
|
else
|
|
gpio_direction_input(pd->gpio);
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
ret = devm_gpio_request(&dev->dev, pdata->gpio, "S3C24XX_LED");
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* no point in having a pull-up if we are always driving */
|
|
|
|
s3c_gpio_setpull(pdata->gpio, S3C_GPIO_PULL_NONE);
|
|
|
|
if (pdata->flags & S3C24XX_LEDF_TRISTATE)
|
|
gpio_direction_input(pdata->gpio);
|
|
else
|
|
gpio_direction_output(pdata->gpio,
|
|
pdata->flags & S3C24XX_LEDF_ACTLOW ? 1 : 0);
|
|
|
|
/* 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");
|