arm64: dts: exynos: add pwm node for exynosautov9-sadk

Add pwm node to support fan on exynosautov9-sadk board.
PWM channel 3 of ExynosAutov9 is connected to fan for SoC cooling
in SADK board.
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com>
Link: https://lore.kernel.org/r/20230718062200.79306-3-jaewon02.kim@samsung.comSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts

@@ -49,6 +49,12 @@ ufs_1_fixed_vcc_reg: regulator-1 {
 	};
 };
 
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm_tout3>;
+	status = "okay";
+};
+
 &serial_0 {
 	pinctrl-0 = <&uart0_bus_dual>;
 	status = "okay";

arch/arm64/boot/dts/exynos/exynosautov9.dtsi

@@ -1560,6 +1560,17 @@ watchdog_cl1: watchdog@10060000 {
 			samsung,syscon-phandle = <&pmu_system_controller>;
 			samsung,cluster-index = <1>;
 		};
+
+		pwm: pwm@103f0000 {
+			compatible = "samsung,exynosautov9-pwm",
+				     "samsung,exynos4210-pwm";
+			reg = <0x103f0000 0x100>;
+			samsung,pwm-outputs = <0>, <1>, <2>, <3>;
+			#pwm-cells = <3>;
+			clocks = <&xtcxo>;
+			clock-names = "timers";
+			status = "disabled";
+		};
 	};
 };