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
ledtrig_audio_mute_activate(struct led_classdev * led_cdev)13 static int ledtrig_audio_mute_activate(struct led_classdev *led_cdev)
14 {
15 led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MUTE]);
16 return 0;
17 }
18
ledtrig_audio_micmute_activate(struct led_classdev * led_cdev)19 static int ledtrig_audio_micmute_activate(struct led_classdev *led_cdev)
20 {
21 led_set_brightness_nosleep(led_cdev, 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
ledtrig_audio_get(enum led_audio type)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
ledtrig_audio_set(enum led_audio type,enum led_brightness state)42 void ledtrig_audio_set(enum led_audio type, enum led_brightness state)
43 {
44 audio_state[type] = state;
45 led_trigger_event(&ledtrig_audio[type], state);
46 }
47 EXPORT_SYMBOL_GPL(ledtrig_audio_set);
48
ledtrig_audio_init(void)49 static int __init ledtrig_audio_init(void)
50 {
51 led_trigger_register(&ledtrig_audio[LED_AUDIO_MUTE]);
52 led_trigger_register(&ledtrig_audio[LED_AUDIO_MICMUTE]);
53 return 0;
54 }
55 module_init(ledtrig_audio_init);
56
ledtrig_audio_exit(void)57 static void __exit ledtrig_audio_exit(void)
58 {
59 led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MUTE]);
60 led_trigger_unregister(&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