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leds-locomo.c

/*
 * linux/drivers/leds/leds-locomo.c
 *
 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
 *
 * 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/device.h>
#include <linux/leds.h>

#include <asm/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",
      .default_trigger  = "sharpsl-charge",
      .brightness_set         = locomoled_brightness_set0,
};

static struct led_classdev locomo_led1 = {
      .name             = "locomo:green",
      .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 <lenz@cs.wisc.edu>");
MODULE_DESCRIPTION("Locomo LED driver");
MODULE_LICENSE("GPL");

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