linux-kernel - [PATCH v2 7/8] arm64: dts: mediatek: cherry: Enable keyboard PWM backlight

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Message-Id: <20220721145017.918102-8-angelogioacchino.delregno@collabora.com>
Date:   Thu, 21 Jul 2022 16:50:16 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v2 7/8] arm64: dts: mediatek: cherry: Enable keyboard PWM backlight

Add a pwm-leds node to enable the PWM controlled keyboard backlight.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index ca9955a97f8f..9086a440a995 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
 #include "mt8195.dtsi"
 #include "mt6359.dtsi"
 
@@ -31,6 +32,18 @@ dmic_codec: dmic-codec {
 		wakeup-delay-ms = <50>;
 	};
 
+	led-controller {
+		compatible = "pwm-leds";
+
+		keyboard_backlight: keyboard-backlight {
+			default-state = "off";
+			function = LED_FUNCTION_KBD_BACKLIGHT;
+			label = "cros_ec::kbd_backlight";
+			max-brightness = <1023>;
+			pwms = <&cros_ec_pwm 3>;
+		};
+	};
+
 	memory@...00000 {
 		device_type = "memory";
 		reg = <0 0x40000000 0 0x80000000>;
-- 
2.35.1