arm64: dts: mt8173: add MT8173 display PWM driver support node

Add display PWM node in mt8173-evb.dts and mt8173.dtsi.
Signed-off-by: YH Huang <yh.huang@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8173-evb.dts

@@ -92,6 +92,13 @@ &mmc1 {
 };
 
 &pio {
+	disp_pwm0_pins: disp_pwm0_pins {
+		pins1 {
+			pinmux = <MT8173_PIN_87_DISP_PWM0__FUNC_DISP_PWM0>;
+			output-low;
+		};
+	};
+
 	mmc0_pins_default: mmc0default {
 		pins_cmd_dat {
 			pinmux = <MT8173_PIN_57_MSDC0_DAT0__FUNC_MSDC0_DAT0>,
@@ -190,6 +197,12 @@ pins_clk {
 	};
 };
 
+&pwm0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&disp_pwm0_pins>;
+	status = "okay";
+};
+
 &pwrap {
 	pmic: mt6397 {
 		compatible = "mediatek,mt6397";

arch/arm64/boot/dts/mediatek/mt8173.dtsi

@@ -525,6 +525,28 @@ mmsys: clock-controller@14000000 {
 			#clock-cells = <1>;
 		};
 
+		pwm0: pwm@1401e000 {
+			compatible = "mediatek,mt8173-disp-pwm",
+				     "mediatek,mt6595-disp-pwm";
+			reg = <0 0x1401e000 0 0x1000>;
+			#pwm-cells = <2>;
+			clocks = <&mmsys CLK_MM_DISP_PWM026M>,
+				 <&mmsys CLK_MM_DISP_PWM0MM>;
+			clock-names = "main", "mm";
+			status = "disabled";
+		};
+
+		pwm1: pwm@1401f000 {
+			compatible = "mediatek,mt8173-disp-pwm",
+				     "mediatek,mt6595-disp-pwm";
+			reg = <0 0x1401f000 0 0x1000>;
+			#pwm-cells = <2>;
+			clocks = <&mmsys CLK_MM_DISP_PWM126M>,
+				 <&mmsys CLK_MM_DISP_PWM1MM>;
+			clock-names = "main", "mm";
+			status = "disabled";
+		};
+
 		imgsys: clock-controller@15000000 {
 			compatible = "mediatek,mt8173-imgsys", "syscon";
 			reg = <0 0x15000000 0 0x1000>;