mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 21:02:19 +00:00
6c152beefb
As discussed on LKML some notion of 'function' is needed in LED naming. This patch adds this to the documentation and standardises existing LED drivers. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/*
|
|
* LEDs driver for Soekris net48xx
|
|
*
|
|
* Copyright (C) 2006 Chris Boot <bootc@bootc.net>
|
|
*
|
|
* Based on leds-ams-delta.c
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/err.h>
|
|
#include <asm/io.h>
|
|
#include <linux/nsc_gpio.h>
|
|
#include <linux/scx200_gpio.h>
|
|
|
|
#define DRVNAME "net48xx-led"
|
|
#define NET48XX_ERROR_LED_GPIO 20
|
|
|
|
static struct platform_device *pdev;
|
|
|
|
static void net48xx_error_led_set(struct led_classdev *led_cdev,
|
|
enum led_brightness value)
|
|
{
|
|
scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
|
|
}
|
|
|
|
static struct led_classdev net48xx_error_led = {
|
|
.name = "net48xx::error",
|
|
.brightness_set = net48xx_error_led_set,
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
static int net48xx_led_suspend(struct platform_device *dev,
|
|
pm_message_t state)
|
|
{
|
|
led_classdev_suspend(&net48xx_error_led);
|
|
return 0;
|
|
}
|
|
|
|
static int net48xx_led_resume(struct platform_device *dev)
|
|
{
|
|
led_classdev_resume(&net48xx_error_led);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define net48xx_led_suspend NULL
|
|
#define net48xx_led_resume NULL
|
|
#endif
|
|
|
|
static int net48xx_led_probe(struct platform_device *pdev)
|
|
{
|
|
return led_classdev_register(&pdev->dev, &net48xx_error_led);
|
|
}
|
|
|
|
static int net48xx_led_remove(struct platform_device *pdev)
|
|
{
|
|
led_classdev_unregister(&net48xx_error_led);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver net48xx_led_driver = {
|
|
.probe = net48xx_led_probe,
|
|
.remove = net48xx_led_remove,
|
|
.suspend = net48xx_led_suspend,
|
|
.resume = net48xx_led_resume,
|
|
.driver = {
|
|
.name = DRVNAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init net48xx_led_init(void)
|
|
{
|
|
int ret;
|
|
|
|
/* small hack, but scx200_gpio doesn't set .dev if the probe fails */
|
|
if (!scx200_gpio_ops.dev) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
ret = platform_driver_register(&net48xx_led_driver);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
|
|
if (IS_ERR(pdev)) {
|
|
ret = PTR_ERR(pdev);
|
|
platform_driver_unregister(&net48xx_led_driver);
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit net48xx_led_exit(void)
|
|
{
|
|
platform_device_unregister(pdev);
|
|
platform_driver_unregister(&net48xx_led_driver);
|
|
}
|
|
|
|
module_init(net48xx_led_init);
|
|
module_exit(net48xx_led_exit);
|
|
|
|
MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
|
|
MODULE_DESCRIPTION("Soekris net48xx LED driver");
|
|
MODULE_LICENSE("GPL");
|
|
|