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authorTakashi Iwai <tiwai@suse.de>2018-11-26 19:47:45 +0300
committerTakashi Iwai <tiwai@suse.de>2018-11-29 01:22:25 +0300
commitd00fa46e0a2c670d980af6e9e81b41ae3f9f02b5 (patch)
tree13f9cb10e84eaaf11e569b12993f644d252627d0 /drivers/platform
parentfaa2541f5b1afa8b6d777a73bc2f27d5c8c98695 (diff)
downloadlinux-d00fa46e0a2c670d980af6e9e81b41ae3f9f02b5.tar.xz
platform/x86: dell-laptop: Add micmute LED trigger support
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>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/Kconfig2
-rw-r--r--drivers/platform/x86/dell-laptop.c25
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 54f6a40c75c6..9b9cc3cc33e9 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -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).
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 06978c14c83b..0db2dbf7b0d1 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -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);