ARM: dts: rockchip: Add SPDIF transceiver for RK3188

Add the SPDIF transceiver controller and pin for RK3188
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3188.dtsi

@@ -121,6 +121,20 @@ i2s0: i2s@1011a000 {
 		status = "disabled";
 	};
 
+	spdif: sound@1011e000 {
+		compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";
+		reg = <0x1011e000 0x2000>;
+		#sound-dai-cells = <0>;
+		clock-names = "hclk", "mclk";
+		clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;
+		dmas = <&dmac1_s 8>;
+		dma-names = "tx";
+		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&spdif_tx>;
+		status = "disabled";
+	};
+
 	cru: clock-controller@20000000 {
 		compatible = "rockchip,rk3188-cru";
 		reg = <0x20000000 0x1000>;
@@ -484,6 +498,12 @@ i2s0_bus: i2s0-bus {
 						<RK_GPIO1 21 RK_FUNC_1 &pcfg_pull_none>;
 			};
 		};
+
+		spdif {
+			spdif_tx: spdif-tx {
+				rockchip,pins = <RK_GPIO1 14 RK_FUNC_1 &pcfg_pull_none>;
+			};
+		};
 	};
 };