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| author | Takashi Iwai <tiwai@suse.de> | 2018-11-26 19:47:44 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-11-28 14:28:30 +0300 |
| commit | faa2541f5b1afa8b6d777a73bc2f27d5c8c98695 (patch) | |
| tree | 554ede6ec6bc2e5cba43240b633ff0c726f6a270 /include | |
| parent | 9ff01193a20d391e8dbce4403dd5ef87c7eaaca6 (diff) | |
| download | linux-faa2541f5b1afa8b6d777a73bc2f27d5c8c98695.tar.xz | |
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')
| -rw-r--r-- | include/linux/leds.h | 20 |
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 */ |