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-rw-r--r--drivers/leds/trigger/ledtrig-audio.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/leds/trigger/ledtrig-audio.c b/drivers/leds/trigger/ledtrig-audio.c
new file mode 100644
index 000000000..c6b437e63
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-audio.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Audio Mute LED trigger
+//
+
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include "../leds.h"
+
+static enum led_brightness audio_state[NUM_AUDIO_LEDS];
+
+static int ledtrig_audio_mute_activate(struct led_classdev *led_cdev)
+{
+ led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MUTE]);
+ return 0;
+}
+
+static int ledtrig_audio_micmute_activate(struct led_classdev *led_cdev)
+{
+ led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MICMUTE]);
+ return 0;
+}
+
+static struct led_trigger ledtrig_audio[NUM_AUDIO_LEDS] = {
+ [LED_AUDIO_MUTE] = {
+ .name = "audio-mute",
+ .activate = ledtrig_audio_mute_activate,
+ },
+ [LED_AUDIO_MICMUTE] = {
+ .name = "audio-micmute",
+ .activate = ledtrig_audio_micmute_activate,
+ },
+};
+
+enum led_brightness ledtrig_audio_get(enum led_audio type)
+{
+ return audio_state[type];
+}
+EXPORT_SYMBOL_GPL(ledtrig_audio_get);
+
+void ledtrig_audio_set(enum led_audio type, enum led_brightness state)
+{
+ audio_state[type] = state;
+ led_trigger_event(&ledtrig_audio[type], state);
+}
+EXPORT_SYMBOL_GPL(ledtrig_audio_set);
+
+static int __init ledtrig_audio_init(void)
+{
+ led_trigger_register(&ledtrig_audio[LED_AUDIO_MUTE]);
+ led_trigger_register(&ledtrig_audio[LED_AUDIO_MICMUTE]);
+ return 0;
+}
+module_init(ledtrig_audio_init);
+
+static void __exit ledtrig_audio_exit(void)
+{
+ led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MUTE]);
+ led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MICMUTE]);
+}
+module_exit(ledtrig_audio_exit);
+
+MODULE_DESCRIPTION("LED trigger for audio mute control");
+MODULE_LICENSE("GPL v2");