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
ledtrig_disk_activity(bool write)20 void ledtrig_disk_activity(bool write)
21 {
22 led_trigger_blink_oneshot(ledtrig_disk, BLINK_DELAY, BLINK_DELAY, 0);
23 if (write)
24 led_trigger_blink_oneshot(ledtrig_disk_write,
25 BLINK_DELAY, BLINK_DELAY, 0);
26 else
27 led_trigger_blink_oneshot(ledtrig_disk_read,
28 BLINK_DELAY, BLINK_DELAY, 0);
29 }
30 EXPORT_SYMBOL(ledtrig_disk_activity);
31
ledtrig_disk_init(void)32 static int __init ledtrig_disk_init(void)
33 {
34 led_trigger_register_simple("disk-activity", &ledtrig_disk);
35 led_trigger_register_simple("disk-read", &ledtrig_disk_read);
36 led_trigger_register_simple("disk-write", &ledtrig_disk_write);
37
38 return 0;
39 }
40 device_initcall(ledtrig_disk_init);
41