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