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From:   <PaddyKP_Yao@asus.com>
To:     <andy.shevchenko@gmail.com>, <hdegoede@redhat.com>
CC:     <paddykp_yao@asus.com>, <acpi4asus-user@lists.sourceforge.net>,
        <corentin.chary@gmail.com>, <ispaddy@gmail.com>,
        <linux-kernel@vger.kernel.org>, <luke@ljones.dev>,
        <mgross@linux.intel.com>, <platform-driver-x86@vger.kernel.org>,
        PaddyKP_Yao <PaddyKP_Yao@asus.com>
Subject: [PATCH v2 1/1] platform/x86: asus-wmi: Add mic-mute LED classdev support
Date:   Mon, 11 Jul 2022 10:47:18 +0800
Message-ID: <20220711024718.1700067-1-PaddyKP_Yao@asus.com>
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From: PaddyKP_Yao <PaddyKP_Yao@asus.com>

In some new ASUS devices, hotkey Fn+F13 is used for mic mute. If mic-mute
LED is present by checking WMI ASUS_WMI_DEVID_MICMUTE_LED, we will add a
mic-mute LED classdev, asus::micmute, in the asus-wmi driver to control
it. The binding of mic-mute LED controls will be swithched with LED
trigger.

Signed-off-by: PaddyKP_Yao <PaddyKP_Yao@asus.com>
---
V1 -> V2: fix typo for 'present' and remove unnecessary pr_info() log

 drivers/platform/x86/Kconfig               |  2 ++
 drivers/platform/x86/asus-wmi.c            | 25 ++++++++++++++++++++++
 include/linux/platform_data/x86/asus-wmi.h |  1 +
 3 files changed, 28 insertions(+)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index f915cf67aa26..74769050b770 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -274,6 +274,8 @@ config ASUS_WMI
        select INPUT_SPARSEKMAP
        select LEDS_CLASS
        select NEW_LEDS
+       select LEDS_TRIGGERS
+       select LEDS_TRIGGER_AUDIO
        select ACPI_PLATFORM_PROFILE
        help
          Say Y here if you have a WMI aware Asus laptop (like Eee PCs or n=
ew
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wm=
i.c
index e14fb5fa7324..40c0e00a4b71 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -191,6 +191,7 @@ struct asus_wmi {
        int kbd_led_wk;
        struct led_classdev lightbar_led;
        int lightbar_led_wk;
+       struct led_classdev micmute_led;
        struct workqueue_struct *led_workqueue;
        struct work_struct tpd_led_work;
        struct work_struct wlan_led_work;
@@ -906,12 +907,23 @@ static enum led_brightness lightbar_led_get(struct le=
d_classdev *led_cdev)
        return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
 }

+static int micmute_led_set(struct led_classdev *led_cdev,
+                          enum led_brightness brightness)
+{
+       int state =3D brightness !=3D LED_OFF;
+       int err;
+
+       err =3D asus_wmi_set_devstate(ASUS_WMI_DEVID_MICMUTE_LED, state, NU=
LL);
+       return err < 0 ? err : 0;
+}
+
 static void asus_wmi_led_exit(struct asus_wmi *asus)
 {
        led_classdev_unregister(&asus->kbd_led);
        led_classdev_unregister(&asus->tpd_led);
        led_classdev_unregister(&asus->wlan_led);
        led_classdev_unregister(&asus->lightbar_led);
+       led_classdev_unregister(&asus->micmute_led);

        if (asus->led_workqueue)
                destroy_workqueue(asus->led_workqueue);
@@ -983,6 +995,19 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
                                           &asus->lightbar_led);
        }

+       if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MICMUTE_LED)) {
+               asus->micmute_led.name =3D "asus::micmute";
+               asus->micmute_led.max_brightness =3D 1;
+               asus->micmute_led.brightness =3D ledtrig_audio_get(LED_AUDI=
O_MICMUTE);
+               asus->micmute_led.brightness_set_blocking =3D micmute_led_s=
et;
+               asus->micmute_led.default_trigger =3D "audio-micmute";
+
+               rv =3D led_classdev_register(&asus->platform_device->dev,
+                                               &asus->micmute_led);
+               if (rv)
+                       goto error;
+       }
+
 error:
        if (rv)
                asus_wmi_led_exit(asus);
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/pla=
tform_data/x86/asus-wmi.h
index 17dc5cb6f3f2..38ee75874d11 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -49,6 +49,7 @@
 #define ASUS_WMI_DEVID_LED4            0x00020014
 #define ASUS_WMI_DEVID_LED5            0x00020015
 #define ASUS_WMI_DEVID_LED6            0x00020016
+#define ASUS_WMI_DEVID_MICMUTE_LED             0x00040017

 /* Backlight and Brightness */
 #define ASUS_WMI_DEVID_ALS_ENABLE      0x00050001 /* Ambient Light Sensor =
*/
--
2.34.1

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