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/*
* LED driver for MTX-1 boards
*
* Copyright 2007 Florian Fainelli <florian@openwrt.org>
*
* 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/mach-au1x00/au1000.h>
static struct platform_device *pdev;
static void mtx1_green_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
{
/* The power LED cannot be controlled the same way as for the Status LED */
if (brightness) {
au_writel( 0x18000800, GPIO2_OUTPUT );
} else {
au_writel( 0x18000000, GPIO2_OUTPUT);
}
}
static void mtx1_red_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
{
/* We store GPIO address (originally address - 200) in the "flags" field*/
unsigned long pinmask = 1 << led_cdev->flags;
if (brightness) {
au_writel((pinmask << 16) | pinmask, GPIO2_OUTPUT);
} else {
au_writel((pinmask << 16) | 0, GPIO2_OUTPUT);
}
}
static struct led_classdev mtx1_green_led = {
.name = "mtx1:green",
.brightness_set = mtx1_green_led_set,
};
static struct led_classdev mtx1_red_led = {
.name = "mtx1:red",
.flags = 12,
.brightness_set = mtx1_red_led_set,
.default_trigger = "ide-disk",
};
static int mtx1_leds_probe(struct platform_device *pdev)
{
int ret;
ret = led_classdev_register(&pdev->dev, &mtx1_green_led);
if (ret < 0)
goto out;
ret = led_classdev_register(&pdev->dev, &mtx1_red_led);
if (ret < 0)
led_classdev_unregister(&mtx1_green_led);
out:
return ret;
}
static int mtx1_leds_remove(struct platform_device *pdev)
{
led_classdev_unregister(&mtx1_green_led);
led_classdev_unregister(&mtx1_red_led);
return 0;
}
static struct platform_driver mtx1_leds_driver = {
.probe = mtx1_leds_probe,
.remove = mtx1_leds_remove,
.driver = {
.name = "mtx1-leds",
}
};
static int __init mtx1_leds_init(void)
{
int ret;
ret = platform_driver_register(&mtx1_leds_driver);
if (ret < 0)
goto out;
pdev = platform_device_register_simple("mtx1-leds", -1, NULL, 0);
if (IS_ERR(pdev)) {
ret = PTR_ERR(pdev);
platform_driver_unregister(&mtx1_leds_driver);
goto out;
}
out:
return ret;
}
static void __exit mtx1_leds_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&mtx1_leds_driver);
}
module_init(mtx1_leds_init);
module_exit(mtx1_leds_exit);
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
MODULE_DESCRIPTION("MTX-1 LED driver");
MODULE_LICENSE("GPL");
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