drivers/leds/trigger/ledtrig-disk.c

   1 /*
   2  * LED Disk Activity Trigger
   3  *
   4  * Copyright 2006 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <rpurdie@openedhand.com>
   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
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/leds.h>
  17
  18 #define BLINK_DELAY 30
  19
  20 DEFINE_LED_TRIGGER(ledtrig_disk);
  21 DEFINE_LED_TRIGGER(ledtrig_ide);
  22
  23 void ledtrig_disk_activity(void)
  24 {
  25         unsigned long blink_delay = BLINK_DELAY;
  26
  27         led_trigger_blink_oneshot(ledtrig_disk,
  28                                   &blink_delay, &blink_delay, 0);
  29         led_trigger_blink_oneshot(ledtrig_ide,
  30                                   &blink_delay, &blink_delay, 0);
  31 }
  32 EXPORT_SYMBOL(ledtrig_disk_activity);
  33
  34 static int __init ledtrig_disk_init(void)
  35 {
  36         led_trigger_register_simple("disk-activity", &ledtrig_disk);
  37         led_trigger_register_simple("ide-disk", &ledtrig_ide);
  38
  39         return 0;
  40 }
  41 device_initcall(ledtrig_disk_init);