leds-hp6xx.c

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/*
 * LED Triggers Core
 * For the HP Jornada 620/660/680/690 handhelds
 *
 * Copyright 2008 Kristoffer Ericson <[email protected]>
 *     this driver is based on leds-spitz.c by Richard Purdie.
 *
 * 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/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <asm/hd64461.h>
#include <mach/hp6xx.h>

static void hp6xxled_green_set(struct led_classdev *led_cdev,
                   enum led_brightness value)
{
    u8 v8;

    v8 = inb(PKDR);
    if (value)
        outb(v8 & (~PKDR_LED_GREEN), PKDR);
    else
        outb(v8 | PKDR_LED_GREEN, PKDR);
}

static void hp6xxled_red_set(struct led_classdev *led_cdev,
                 enum led_brightness value)
{
    u16 v16;

    v16 = inw(HD64461_GPBDR);
    if (value)
        outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
    else
        outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
}

static struct led_classdev hp6xx_red_led = {
    .name           = "hp6xx:red",
    .default_trigger    = "hp6xx-charge",
    .brightness_set     = hp6xxled_red_set,
    .flags          = LED_CORE_SUSPENDRESUME,
};

static struct led_classdev hp6xx_green_led = {
    .name           = "hp6xx:green",
    .default_trigger    = "ide-disk",
    .brightness_set     = hp6xxled_green_set,
    .flags          = LED_CORE_SUSPENDRESUME,
};

static int hp6xxled_probe(struct platform_device *pdev)
{
    int ret;

    ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
    if (ret < 0)
        return ret;

    ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
    if (ret < 0)
        led_classdev_unregister(&hp6xx_red_led);

    return ret;
}

static int hp6xxled_remove(struct platform_device *pdev)
{
    led_classdev_unregister(&hp6xx_red_led);
    led_classdev_unregister(&hp6xx_green_led);

    return 0;
}

static struct platform_driver hp6xxled_driver = {
    .probe      = hp6xxled_probe,
    .remove     = hp6xxled_remove,
    .driver     = {
        .name       = "hp6xx-led",
        .owner      = THIS_MODULE,
    },
};

module_platform_driver(hp6xxled_driver);

MODULE_AUTHOR("Kristoffer Ericson <[email protected]>");
MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:hp6xx-led");