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authorTakashi Iwai <tiwai@suse.de>2018-11-26 17:47:44 +0100
committerTakashi Iwai <tiwai@suse.de>2018-11-28 12:28:30 +0100
commitfaa2541f5b1afa8b6d777a73bc2f27d5c8c98695 (patch)
tree554ede6ec6bc2e5cba43240b633ff0c726f6a270 /include/linux/leds.h
parent9ff01193a20d391e8dbce4403dd5ef87c7eaaca6 (diff)
leds: trigger: Introduce audio mute LED trigger
This patch adds a new LED trigger for coupling the audio mixer change with the LED on laptops or other devices. Currently there are two trigger types, "audio-mute" and "audio-micmute". The audio driver triggers the LED brightness change via ledtrig_audio_set() call with the proper type (either mute or mic-mute). OTOH, the consumers may call ledtrig_audio_get() for the initial brightness value that may have been set by the audio driver beforehand. This new stuff will be used by HD-audio codec driver and some platform drivers (thinkpad_acpi and dell-laptop, also upcoming huawei-wmi). Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/linux/leds.h')
-rw-r--r--include/linux/leds.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 7393a316d9fa..580cbaef789a 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -487,4 +487,24 @@ struct led_pattern {
int brightness;
};
+enum led_audio {
+ LED_AUDIO_MUTE, /* master mute LED */
+ LED_AUDIO_MICMUTE, /* mic mute LED */
+ NUM_AUDIO_LEDS
+};
+
+#if IS_ENABLED(CONFIG_LEDS_TRIGGER_AUDIO)
+enum led_brightness ledtrig_audio_get(enum led_audio type);
+void ledtrig_audio_set(enum led_audio type, enum led_brightness state);
+#else
+static inline enum led_brightness ledtrig_audio_get(enum led_audio type)
+{
+ return LED_OFF;
+}
+static inline void ledtrig_audio_set(enum led_audio type,
+ enum led_brightness state)
+{
+}
+#endif
+
#endif /* __LINUX_LEDS_H_INCLUDED */