arm64: dts: enable SPDIF output (PIN13)

Signed-off-by: Nick Xie <[email protected]>

Author: numbqq

arch/arm64/boot/dts/rockchip/rk3399-khadas-edge.dtsi

@@ -161,6 +161,24 @@
 		rockchip,codec = <&hdmi>, <&cdn_dp>;
 	};
 
+	spdif_sound: spdif-sound {
+		status = "okay";
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "SPDIF";
+		simple-audio-card,cpu {
+			sound-dai = <&spdif>;
+		};
+		simple-audio-card,codec {
+			sound-dai = <&spdif_out>;
+		};
+	};
+
+	spdif_out: spdif-out {
+		status = "okay";
+		compatible = "linux,spdif-dit";
+		#sound-dai-cells = <0>;
+	};
+
 	sdio_pwrseq: sdio-pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		clocks = <&rk808 1>;
@@ -765,6 +783,12 @@
 	status = "okay";
 };
 
+&spdif {
+	status = "okay";
+	pinctrl-0 = <&spdif_bus_1>;
+	#sound-dai-cells = <0>;
+};
+
 &sdio0 {
 	clock-frequency = <200000000>;
 	clock-freq-min-max = <200000 200000000>;