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 
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 
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