leds-locomo.c

Go to the documentation of this file.

/*
 * linux/drivers/leds/leds-locomo.c
 *
 * Copyright (C) 2005 John Lenz <[email protected]>
 *
 * 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/module.h>
#include <linux/device.h>
#include <linux/leds.h>

#include <mach/hardware.h>
#include <asm/hardware/locomo.h>

static void locomoled_brightness_set(struct led_classdev *led_cdev,
                enum led_brightness value, int offset)
{
    struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
    unsigned long flags;

    local_irq_save(flags);
    if (value)
        locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
    else
        locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
    local_irq_restore(flags);
}

static void locomoled_brightness_set0(struct led_classdev *led_cdev,
                enum led_brightness value)
{
    locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
}

static void locomoled_brightness_set1(struct led_classdev *led_cdev,
                enum led_brightness value)
{
    locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
}

static struct led_classdev locomo_led0 = {
    .name           = "locomo:amber:charge",
    .default_trigger    = "main-battery-charging",
    .brightness_set     = locomoled_brightness_set0,
};

static struct led_classdev locomo_led1 = {
    .name           = "locomo:green:mail",
    .default_trigger    = "nand-disk",
    .brightness_set     = locomoled_brightness_set1,
};

static int locomoled_probe(struct locomo_dev *ldev)
{
    int ret;

    ret = led_classdev_register(&ldev->dev, &locomo_led0);
    if (ret < 0)
        return ret;

    ret = led_classdev_register(&ldev->dev, &locomo_led1);
    if (ret < 0)
        led_classdev_unregister(&locomo_led0);

    return ret;
}

static int locomoled_remove(struct locomo_dev *dev)
{
    led_classdev_unregister(&locomo_led0);
    led_classdev_unregister(&locomo_led1);
    return 0;
}

static struct locomo_driver locomoled_driver = {
    .drv = {
        .name = "locomoled"
    },
    .devid  = LOCOMO_DEVID_LED,
    .probe  = locomoled_probe,
    .remove = locomoled_remove,
};

static int __init locomoled_init(void)
{
    return locomo_driver_register(&locomoled_driver);
}
module_init(locomoled_init);

MODULE_AUTHOR("John Lenz <[email protected]>");
MODULE_DESCRIPTION("Locomo LED driver");
MODULE_LICENSE("GPL");