ARM: dts: Add sound nodes for exynos4412-trats2

This patch add WM1811 audio codec, I2S interface and the sound
machine nodes to enable audio on exynos4412-trats2 board.
Signed-off-by: Inha Song <ideal.song@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

arch/arm/boot/dts/exynos4412-trats2.dts

@@ -186,6 +186,25 @@ s5c73m3_ep: endpoint {
 		};
 	};
 
+	i2c@138A0000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-slave-addr = <0x10>;
+		samsung,i2c-max-bus-freq = <100000>;
+		pinctrl-0 = <&i2c4_bus>;
+		pinctrl-names = "default";
+		status = "okay";
+
+		wm1811: wm1811@1a {
+			compatible = "wlf,wm1811";
+			reg = <0x1a>;
+			clocks = <&pmu_system_controller 0>;
+			clock-names = "MCLK1";
+			DCVDD-supply = <&ldo3_reg>;
+			DBVDD1-supply = <&ldo3_reg>;
+			wlf,ldo1ena = <&gpj0 4 0>;
+		};
+	};
+
 	i2c@138D0000 {
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-slave-addr = <0x10>;
@@ -863,6 +882,24 @@ is_s5k6a3_ep: endpoint {
 		};
 	};
 
+	i2s0: i2s@03830000 {
+		pinctrl-0 = <&i2s0_bus>;
+		pinctrl-names = "default";
+		status = "okay";
+	};
+
+	sound {
+		compatible = "samsung,trats2-audio";
+		samsung,i2s-controller = <&i2s0>;
+		samsung,model = "Trats2";
+		samsung,audio-codec = <&wm1811>;
+		samsung,audio-routing =
+			"SPK", "SPKOUTLN",
+			"SPK", "SPKOUTLP",
+			"SPK", "SPKOUTRN",
+			"SPK", "SPKOUTRP";
+	};
+
 	exynos-usbphy@125B0000 {
 		status = "okay";
 	};
@@ -891,6 +928,11 @@ thermistor-battery@1 {
 	};
 };
 
+&pmu_system_controller {
+	assigned-clocks = <&pmu_system_controller 0>;
+	assigned-clock-parents =  <&clock CLK_XUSBXTI>;
+};
+
 &pinctrl_0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&sleep0>;