1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * LED Disk Activity Trigger
4  *
5  * Copyright 2006 Openedhand Ltd.
6  *
7  * Author: Richard Purdie <rpurdie@openedhand.com>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/leds.h>
13 
14 #define BLINK_DELAY 30
15 
16 DEFINE_LED_TRIGGER(ledtrig_disk);
17 DEFINE_LED_TRIGGER(ledtrig_disk_read);
18 DEFINE_LED_TRIGGER(ledtrig_disk_write);
19 DEFINE_LED_TRIGGER(ledtrig_ide);
20 
21 void ledtrig_disk_activity(bool write)
22 {
23 	unsigned long blink_delay = BLINK_DELAY;
24 
25 	led_trigger_blink_oneshot(ledtrig_disk,
26 				  &blink_delay, &blink_delay, 0);
27 	led_trigger_blink_oneshot(ledtrig_ide,
28 				  &blink_delay, &blink_delay, 0);
29 	if (write)
30 		led_trigger_blink_oneshot(ledtrig_disk_write,
31 					  &blink_delay, &blink_delay, 0);
32 	else
33 		led_trigger_blink_oneshot(ledtrig_disk_read,
34 					  &blink_delay, &blink_delay, 0);
35 }
36 EXPORT_SYMBOL(ledtrig_disk_activity);
37 
38 static int __init ledtrig_disk_init(void)
39 {
40 	led_trigger_register_simple("disk-activity", &ledtrig_disk);
41 	led_trigger_register_simple("disk-read", &ledtrig_disk_read);
42 	led_trigger_register_simple("disk-write", &ledtrig_disk_write);
43 	led_trigger_register_simple("ide-disk", &ledtrig_ide);
44 
45 	return 0;
46 }
47 device_initcall(ledtrig_disk_init);
48