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platform/x86: dell-laptop: Add micmute LED trigger support

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This patch adds the LED trigger support for audio mic-mute control.
As of this patch, the LED device isn't tied with the audio driver, and
can be changed via user-space at "platform::micmute" sysfs entry.
(This new prefix "platform" is the agreement among people for
indicating the generic laptop / system-wide attribute.)

The binding with HD-audio is still done via the existing exported
dell_micmute_led_set().  It will be replaced with the LED trigger
binding in later patches.

Also this selects CONFIG_LEDS_TRIGGERS and CONFIG_LEDS_TRIGGERS_AUDIO
unconditionally.  Strictly speaking, these aren't 100% mandatory, but
leaving these manual selections would lead to a functional regression
easily once after converting from the dynamic symbol binding to the
LEDs trigger in a later patch.

Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2018-11-26 17:47:45 +01:00
parent faa2541f5b
commit d00fa46e0a
2 changed files with 27 additions and 0 deletions
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2
drivers/platform/x86/Kconfig
View file

@ -177,6 +177,8 @@ config DELL_LAPTOP
select POWER_SUPPLY
select LEDS_CLASS
select NEW_LEDS
select LEDS_TRIGGERS
select LEDS_TRIGGER_AUDIO
---help---
This driver adds support for rfkill and backlight control to Dell
laptops (except for some models covered by the Compal driver).

25
drivers/platform/x86/dell-laptop.c
View file

@ -2131,6 +2131,23 @@ int dell_micmute_led_set(int state)
}
EXPORT_SYMBOL_GPL(dell_micmute_led_set);
static int micmute_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
int state = brightness != LED_OFF;
int err;
err = dell_micmute_led_set(state);
return err < 0 ? err : 0;
}
static struct led_classdev micmute_led_cdev = {
.name = "platform::micmute",
.max_brightness = 1,
.brightness_set_blocking = micmute_led_set,
.default_trigger = "audio-micmute",
};
static int __init dell_init(void)
{
struct calling_interface_token *token;
@ -2175,6 +2192,11 @@ static int __init dell_init(void)
dell_laptop_register_notifier(&dell_laptop_notifier);
micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev);
if (ret < 0)
goto fail_led;
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
@ -2220,6 +2242,8 @@ static int __init dell_init(void)
fail_get_brightness:
backlight_device_unregister(dell_backlight_device);
fail_backlight:
led_classdev_unregister(&micmute_led_cdev);
fail_led:
dell_cleanup_rfkill();
fail_rfkill:
platform_device_del(platform_device);
@ -2239,6 +2263,7 @@ static void __exit dell_exit(void)
touchpad_led_exit();
kbd_led_exit();
backlight_device_unregister(dell_backlight_device);
led_classdev_unregister(&micmute_led_cdev);
dell_cleanup_rfkill();
if (platform_device) {
platform_device_unregister(platform_device);