LXR linux/drivers/leds/leds-hp6xx.c

   1/*
   2 * LED Triggers Core
   3 * For the HP Jornada 620/660/680/690 handhelds
   4 *
   5 * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
   6 *     this driver is based on leds-spitz.c by Richard Purdie.
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/platform_device.h>
  16#include <linux/leds.h>
  17#include <asm/hd64461.h>
  18#include <mach/hp6xx.h>
  19
  20static void hp6xxled_green_set(struct led_classdev *led_cdev,
  21                               enum led_brightness value)
  22{
  23        u8 v8;
  24
  25        v8 = inb(PKDR);
  26        if (value)
  27                outb(v8 & (~PKDR_LED_GREEN), PKDR);
  28        else
  29                outb(v8 | PKDR_LED_GREEN, PKDR);
  30}
  31
  32static void hp6xxled_red_set(struct led_classdev *led_cdev,
  33                             enum led_brightness value)
  34{
  35        u16 v16;
  36
  37        v16 = inw(HD64461_GPBDR);
  38        if (value)
  39                outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
  40        else
  41                outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
  42}
  43
  44static struct led_classdev hp6xx_red_led = {
  45        .name                   = "hp6xx:red",
  46        .default_trigger        = "hp6xx-charge",
  47        .brightness_set         = hp6xxled_red_set,
  48        .flags                  = LED_CORE_SUSPENDRESUME,
  49};
  50
  51static struct led_classdev hp6xx_green_led = {
  52        .name                   = "hp6xx:green",
  53        .default_trigger        = "ide-disk",
  54        .brightness_set         = hp6xxled_green_set,
  55        .flags                  = LED_CORE_SUSPENDRESUME,
  56};
  57
  58static int hp6xxled_probe(struct platform_device *pdev)
  59{
  60        int ret;
  61
  62        ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
  63        if (ret < 0)
  64                return ret;
  65
  66        ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
  67        if (ret < 0)
  68                led_classdev_unregister(&hp6xx_red_led);
  69
  70        return ret;
  71}
  72
  73static int hp6xxled_remove(struct platform_device *pdev)
  74{
  75        led_classdev_unregister(&hp6xx_red_led);
  76        led_classdev_unregister(&hp6xx_green_led);
  77
  78        return 0;
  79}
  80
  81/* work with hotplug and coldplug */
  82MODULE_ALIAS("platform:hp6xx-led");
  83
  84static struct platform_driver hp6xxled_driver = {
  85        .probe          = hp6xxled_probe,
  86        .remove         = hp6xxled_remove,
  87        .driver         = {
  88                .name           = "hp6xx-led",
  89                .owner          = THIS_MODULE,
  90        },
  91};
  92
  93static int __init hp6xxled_init(void)
  94{
  95        return platform_driver_register(&hp6xxled_driver);
  96}
  97
  98static void __exit hp6xxled_exit(void)
  99{
 100        platform_driver_unregister(&hp6xxled_driver);
 101}
 102
 103module_init(hp6xxled_init);
 104module_exit(hp6xxled_exit);
 105
 106MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
 107MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
 108MODULE_LICENSE("GPL");
 109