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_disk_read);
22 DEFINE_LED_TRIGGER(ledtrig_disk_write);
23 DEFINE_LED_TRIGGER(ledtrig_ide);
24
ledtrig_disk_activity(bool write)25 void ledtrig_disk_activity(bool write)
26 {
27 unsigned long blink_delay = BLINK_DELAY;
28
29 led_trigger_blink_oneshot(ledtrig_disk,
30 &blink_delay, &blink_delay, 0);
31 led_trigger_blink_oneshot(ledtrig_ide,
32 &blink_delay, &blink_delay, 0);
33 if (write)
34 led_trigger_blink_oneshot(ledtrig_disk_write,
35 &blink_delay, &blink_delay, 0);
36 else
37 led_trigger_blink_oneshot(ledtrig_disk_read,
38 &blink_delay, &blink_delay, 0);
39 }
40 EXPORT_SYMBOL(ledtrig_disk_activity);
41
ledtrig_disk_init(void)42 static int __init ledtrig_disk_init(void)
43 {
44 led_trigger_register_simple("disk-activity", &ledtrig_disk);
45 led_trigger_register_simple("disk-read", &ledtrig_disk_read);
46 led_trigger_register_simple("disk-write", &ledtrig_disk_write);
47 led_trigger_register_simple("ide-disk", &ledtrig_ide);
48
49 return 0;
50 }
51 device_initcall(ledtrig_disk_init);
52