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 | #include "../leds.h" |
10 | |
11 | static enum led_brightness audio_state[NUM_AUDIO_LEDS]; |
12 | |
13 | static int ledtrig_audio_mute_activate(struct led_classdev *led_cdev) |
14 | { |
15 | led_set_brightness_nosleep(led_cdev, value: audio_state[LED_AUDIO_MUTE]); |
16 | return 0; |
17 | } |
18 | |
19 | static int ledtrig_audio_micmute_activate(struct led_classdev *led_cdev) |
20 | { |
21 | led_set_brightness_nosleep(led_cdev, value: audio_state[LED_AUDIO_MICMUTE]); |
22 | return 0; |
23 | } |
24 | |
25 | static struct led_trigger ledtrig_audio[NUM_AUDIO_LEDS] = { |
26 | [LED_AUDIO_MUTE] = { |
27 | .name = "audio-mute" , |
28 | .activate = ledtrig_audio_mute_activate, |
29 | }, |
30 | [LED_AUDIO_MICMUTE] = { |
31 | .name = "audio-micmute" , |
32 | .activate = ledtrig_audio_micmute_activate, |
33 | }, |
34 | }; |
35 | |
36 | enum led_brightness ledtrig_audio_get(enum led_audio type) |
37 | { |
38 | return audio_state[type]; |
39 | } |
40 | EXPORT_SYMBOL_GPL(ledtrig_audio_get); |
41 | |
42 | void ledtrig_audio_set(enum led_audio type, enum led_brightness state) |
43 | { |
44 | audio_state[type] = state; |
45 | led_trigger_event(trigger: &ledtrig_audio[type], event: state); |
46 | } |
47 | EXPORT_SYMBOL_GPL(ledtrig_audio_set); |
48 | |
49 | static int __init ledtrig_audio_init(void) |
50 | { |
51 | led_trigger_register(trigger: &ledtrig_audio[LED_AUDIO_MUTE]); |
52 | led_trigger_register(trigger: &ledtrig_audio[LED_AUDIO_MICMUTE]); |
53 | return 0; |
54 | } |
55 | module_init(ledtrig_audio_init); |
56 | |
57 | static void __exit ledtrig_audio_exit(void) |
58 | { |
59 | led_trigger_unregister(trigger: &ledtrig_audio[LED_AUDIO_MUTE]); |
60 | led_trigger_unregister(trigger: &ledtrig_audio[LED_AUDIO_MICMUTE]); |
61 | } |
62 | module_exit(ledtrig_audio_exit); |
63 | |
64 | MODULE_DESCRIPTION("LED trigger for audio mute control" ); |
65 | MODULE_LICENSE("GPL v2" ); |
66 | MODULE_ALIAS("ledtrig:audio-mute" ); |
67 | MODULE_ALIAS("ledtrig:audio-micmute" ); |
68 | |