linux-kernel - [PATCH v2 2/3] arm64: dts: mediatek: mt6795-xperia-m5: Add display backlight support

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Date:   Fri, 21 Jul 2023 10:28:21 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, kernel@...labora.com,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Alexandre Mergnat <amergnat@...libre.com>
Subject: [PATCH v2 2/3] arm64: dts: mediatek: mt6795-xperia-m5: Add display backlight support

Add the relevant nodes for display backlight on Sony Xperia M5: this
needs both the SoC PWM IP and MT6332 PMIC LED strings.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>
---
 .../dts/mediatek/mt6795-sony-xperia-m5.dts    | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
index b5746e6d0b15..ecdf00707a44 100644
--- a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
+++ b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
@@ -22,6 +22,23 @@ aliases {
 		serial1 = &uart1;
 	};
 
+	backlight_lcd0: backlight {
+		compatible = "led-backlight";
+		leds = <&disp_led_pwm>, <&pmic_bl_led>;
+
+		default-brightness-level = <300>;
+	};
+
+	led-controller-display {
+		compatible = "pwm-leds";
+
+		disp_led_pwm: led-0 {
+			label = "backlight-pwm";
+			pwms = <&pwm0 0 500000>;
+			max-brightness = <1024>;
+		};
+	};
+
 	memory@...00000 {
 		device_type = "memory";
 		reg = <0 0x40000000 0 0x1e800000>;
@@ -338,6 +355,21 @@ &pmic {
 	 * an interrupt on the companion, so we use the MT6332 IRQ GPIO.
 	 */
 	interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>;
+
+	mt6332-led {
+		compatible = "mediatek,mt6332-led";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		pmic_bl_led: led@0 {
+			reg = <0>;
+			label = "backlight-pmic";
+		};
+	};
+};
+
+&pwm0 {
+	status = "okay";
 };
 
 &uart0 {
-- 
2.41.0