1
0
mirror of https://github.com/torvalds/linux.git synced 2024-12-25 12:21:37 +00:00
linux/drivers/leds/leds-net48xx.c
Richard Purdie 859cb7f2a4 leds: Add suspend/resume to the core class
Add suspend/resume to the core class and remove all the now unneeded
code from various drivers. Originally the class code couldn't support
suspend/resume but since class_device can there is no reason for
each driver doing its own suspend/resume anymore.
2009-01-08 17:55:03 +00:00

97 lines
2.1 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,
.flags = LED_CORE_SUSPENDRESUME,
};
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,
.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");