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

   1/*
   2 * linux/drivers/leds/leds-locomo.c
   3 *
   4 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/init.h>
  13#include <linux/module.h>
  14#include <linux/device.h>
  15#include <linux/leds.h>
  16
  17#include <mach/hardware.h>
  18#include <asm/hardware/locomo.h>
  19
  20static void locomoled_brightness_set(struct led_classdev *led_cdev,
  21                                enum led_brightness value, int offset)
  22{
  23        struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
  24        unsigned long flags;
  25
  26        local_irq_save(flags);
  27        if (value)
  28                locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
  29        else
  30                locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
  31        local_irq_restore(flags);
  32}
  33
  34static void locomoled_brightness_set0(struct led_classdev *led_cdev,
  35                                enum led_brightness value)
  36{
  37        locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
  38}
  39
  40static void locomoled_brightness_set1(struct led_classdev *led_cdev,
  41                                enum led_brightness value)
  42{
  43        locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
  44}
  45
  46static struct led_classdev locomo_led0 = {
  47        .name                   = "locomo:amber:charge",
  48        .default_trigger        = "main-battery-charging",
  49        .brightness_set         = locomoled_brightness_set0,
  50};
  51
  52static struct led_classdev locomo_led1 = {
  53        .name                   = "locomo:green:mail",
  54        .default_trigger        = "nand-disk",
  55        .brightness_set         = locomoled_brightness_set1,
  56};
  57
  58static int locomoled_probe(struct locomo_dev *ldev)
  59{
  60        int ret;
  61
  62        ret = led_classdev_register(&ldev->dev, &locomo_led0);
  63        if (ret < 0)
  64                return ret;
  65
  66        ret = led_classdev_register(&ldev->dev, &locomo_led1);
  67        if (ret < 0)
  68                led_classdev_unregister(&locomo_led0);
  69
  70        return ret;
  71}
  72
  73static int locomoled_remove(struct locomo_dev *dev)
  74{
  75        led_classdev_unregister(&locomo_led0);
  76        led_classdev_unregister(&locomo_led1);
  77        return 0;
  78}
  79
  80static struct locomo_driver locomoled_driver = {
  81        .drv = {
  82                .name = "locomoled"
  83        },
  84        .devid  = LOCOMO_DEVID_LED,
  85        .probe  = locomoled_probe,
  86        .remove = locomoled_remove,
  87};
  88
  89static int __init locomoled_init(void)
  90{
  91        return locomo_driver_register(&locomoled_driver);
  92}
  93module_init(locomoled_init);
  94
  95MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
  96MODULE_DESCRIPTION("Locomo LED driver");
  97MODULE_LICENSE("GPL");
  98