ARM: dts: sun7i: Add SPDIF to the Itead Ibox

Enable the S/PDIF transmitter that is present on the Itead Ibox.
Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun7i-a20-itead-ibox.dts

@@ -65,6 +65,24 @@ blue {
 			default-state = "on";
 		};
 	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "On-board SPDIF";
+
+		simple-audio-card,cpu {
+			sound-dai = <&spdif>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&spdif_out>;
+		};
+	};
+
+	spdif_out: spdif-out {
+		#sound-dai-cells = <0>;
+		compatible = "linux,spdif-dit";
+	};
 };
 
 &ahci {
@@ -123,3 +141,9 @@ led_pins_itead_core: led_pins@0 {
 &reg_ahci_5v {
 	status = "okay";
 };
+
+&spdif {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spdif_tx_pins_a>;
+	status = "okay";
+};