linux-kernel - [PATCH] arm64: dts: mt8183: Add pwm and backlight node

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Message-Id: <20201124041253.4181273-1-hsinyi@chromium.org>
Date:   Tue, 24 Nov 2020 12:12:54 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH] arm64: dts: mt8183: Add pwm and backlight node

Add pwm to mt8183 and backlight to mt8183-kukui.

Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
---
 .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 28 +++++++++++++++++++
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 10 +++++++
 2 files changed, 38 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index 85f7c33ba4461..bf2ad1294dd30 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -19,6 +19,17 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	backlight_lcd0: backlight_lcd0 {
+		compatible = "pwm-backlight";
+		pwms = <&pwm0 0 500000>;
+		power-supply = <&bl_pp5000>;
+		enable-gpios = <&pio 176 0>;
+		brightness-levels = <0 1023>;
+		num-interpolated-steps = <1023>;
+		default-brightness-level = <576>;
+		status = "okay";
+	};
+
 	memory@...00000 {
 		device_type = "memory";
 		reg = <0 0x40000000 0 0x80000000>;
@@ -536,6 +547,17 @@ pins_clk {
 		};
 	};
 
+	pwm0_pin_default: pwm0_pin_default {
+		pins1 {
+			pinmux = <PINMUX_GPIO176__FUNC_GPIO176>;
+			output-high;
+			bias-pull-up;
+		};
+		pins2 {
+			pinmux = <PINMUX_GPIO43__FUNC_DISP_PWM>;
+		};
+	};
+
 	scp_pins: scp {
 		pins_scp_uart {
 			pinmux = <PINMUX_GPIO110__FUNC_TP_URXD1_AO>,
@@ -670,6 +692,12 @@ pins_wifi_wakeup {
 	};
 };
 
+&pwm0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_pin_default>;
+};
+
 &scp {
 	status = "okay";
 	pinctrl-names = "default";
diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index 08a914d3a6435..a974bad899365 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -479,6 +479,16 @@ spi0: spi@...0a000 {
 			status = "disabled";
 		};
 
+		pwm0: pwm@...0e000 {
+			compatible = "mediatek,mt8183-disp-pwm";
+			reg = <0 0x1100e000 0 0x1000>;
+			interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_LOW>;
+			#pwm-cells = <2>;
+			clocks = <&topckgen CLK_TOP_MUX_DISP_PWM>,
+					<&infracfg CLK_INFRA_DISP_PWM>;
+			clock-names = "main", "mm";
+		};
+
 		i2c3: i2c@...0f000 {
 			compatible = "mediatek,mt8183-i2c";
 			reg = <0 0x1100f000 0 0x1000>,
-- 
2.29.2.454.gaff20da3a2-goog