arm64: dts: allwinner: a64: Add the SPDIF block and pin

Add the SPDIF transceiver controller block and pin to the A64 dtsi.
Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

@@ -336,6 +336,11 @@ rgmii_pins: rgmii_pins {
 				drive-strength = <40>;
 			};
 
+			spdif_tx_pin: spdif {
+				pins = "PH8";
+				function = "spdif";
+			};
+
 			spi0_pins: spi0 {
 				pins = "PC0", "PC1", "PC2", "PC3";
 				function = "spi0";
@@ -382,6 +387,22 @@ uart4_rts_cts_pins: uart4-rts-cts-pins {
 			};
 		};
 
+		spdif: spdif@1c21000 {
+			#sound-dai-cells = <0>;
+			compatible = "allwinner,sun50i-a64-spdif",
+				     "allwinner,sun8i-h3-spdif";
+			reg = <0x01c21000 0x400>;
+			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_SPDIF>, <&ccu CLK_SPDIF>;
+			resets = <&ccu RST_BUS_SPDIF>;
+			clock-names = "apb", "spdif";
+			dmas = <&dma 2>;
+			dma-names = "tx";
+			pinctrl-names = "default";
+			pinctrl-0 = <&spdif_tx_pin>;
+			status = "disabled";
+		};
+
 		uart0: serial@1c28000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x01c28000 0x400>;