tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2//
3// Audio Mute LED trigger
4//
5
6#include <linux/kernel.h>
7#include <linux/leds.h>
8#include <linux/module.h>
9
10static struct led_trigger *ledtrig_audio[NUM_AUDIO_LEDS];
11static enum led_brightness audio_state[NUM_AUDIO_LEDS];
12
13enum led_brightness ledtrig_audio_get(enum led_audio type)
14{
15 return audio_state[type];
16}
17EXPORT_SYMBOL_GPL(ledtrig_audio_get);
18
19void ledtrig_audio_set(enum led_audio type, enum led_brightness state)
20{
21 audio_state[type] = state;
22 led_trigger_event(ledtrig_audio[type], state);
23}
24EXPORT_SYMBOL_GPL(ledtrig_audio_set);
25
26static int __init ledtrig_audio_init(void)
27{
28 led_trigger_register_simple("audio-mute",
29 &ledtrig_audio[LED_AUDIO_MUTE]);
30 led_trigger_register_simple("audio-micmute",
31 &ledtrig_audio[LED_AUDIO_MICMUTE]);
32 return 0;
33}
34module_init(ledtrig_audio_init);
35
36static void __exit ledtrig_audio_exit(void)
37{
38 led_trigger_unregister_simple(ledtrig_audio[LED_AUDIO_MUTE]);
39 led_trigger_unregister_simple(ledtrig_audio[LED_AUDIO_MICMUTE]);
40}
41module_exit(ledtrig_audio_exit);
42
43MODULE_DESCRIPTION("LED trigger for audio mute control");
44MODULE_LICENSE("GPL v2");