linux-imx

/*

 * LEDs driver for the "User LED" on Routerboard532

 *

 * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>

 *

 * Based on leds-cobalt-qube.c by Florian Fainelly and

 * rb-diag.c (my own standalone driver for both LED and

 * button of Routerboard532).

 */

​

#include <linux/leds.h>

#include <linux/module.h>

#include <linux/platform_device.h>

​

#include <asm/mach-rc32434/gpio.h>

#include <asm/mach-rc32434/rb.h>

​

static void rb532_led_set(struct led_classdev *cdev,

              enum led_brightness brightness)

{

    if (brightness)

        set_latch_u5(LO_ULED, 0);

​

    else

        set_latch_u5(0, LO_ULED);

}

​

static enum led_brightness rb532_led_get(struct led_classdev *cdev)

{

    return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;

}

​

static struct led_classdev rb532_uled = {

    .name = "uled",

    .brightness_set = rb532_led_set,

    .brightness_get = rb532_led_get,

    .default_trigger = "nand-disk",

};

​

static int rb532_led_probe(struct platform_device *pdev)

{

    return led_classdev_register(&pdev->dev, &rb532_uled);

}

​

static int rb532_led_remove(struct platform_device *pdev)

{

    led_classdev_unregister(&rb532_uled);

    return 0;

}

​

static struct platform_driver rb532_led_driver = {

    .probe = rb532_led_probe,

    .remove = rb532_led_remove,

    .driver = {

        .name = "rb532-led",

    },

};

​

module_platform_driver(rb532_led_driver);

​

MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("User LED support for Routerboard532");

MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");