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/*
* ADM5120 LED (GPIO) driver
*
* Copyright (C) Jeroen Vreeken (pe1rxq@amsat.org), 2005
* Copyright (C) OpenWrt.org, Florian Fainelli <florian@openwrt.org>, 2007
*
* 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>
#define GPIO_IO ((unsigned long *)0xb20000b8)
static void adm5120_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
{
if (brightness)
*GPIO_IO=(*GPIO_IO & 0x00ffffff) | (brightness << 24);
else
*GPIO_IO=(*GPIO_IO & 0x00ffffff) | (0 << 24);
}
static struct led_classdev adm5120_gpio_led = {
.name = "adm5120:led",
.brightness_set = adm5120_led_set,
};
static int __init adm5120_led_init(void)
{
int ret = led_classdev_register(NULL, &adm5120_gpio_led);
if (ret < 0)
printk(KERN_WARNING "adm5120: unable to register LED device\n");
return ret;
}
static void __exit adm5120_led_exit(void)
{
led_classdev_unregister(&adm5120_gpio_led);
}
module_init(adm5120_led_init);
module_exit(adm5120_led_exit);
MODULE_DESCRIPTION("ADM5120 LED driver");
MODULE_AUTHOR("Jeroen Vreeken, OpenWrt.org");
MODULE_LICENSE("GPL");
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