EXYNOS5: FDT: Add sound device node data

Add sound device node data for exynos
Signed-off-by: NRajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NMinkyu Kang <mk7.kang@samsung.com>

arch/arm/dts/exynos5250.dtsi

@@ -92,4 +92,9 @@
 		reg = <0x12CD0000 0x100>;
 		interrupts = <0 63 0>;
 	};
+
+	sound@12d60000 {
+		compatible = "samsung,exynos-sound";
+		reg = <0x12d60000 0x20>;
+	};
 };

doc/device-tree-bindings/exynos/sound.txt

+Exynos Sound Subsystem
+
+The device node for sound subsytem which contains codec and i2s block
+that is a part of Exynos5250
+
+Required properties :
+ - compatible : Should be "samsung,exynos-sound" for sound
+ - samsung,i2s-epll-clock-frequency : epll clock output frequency in Hz
+ - samsung,i2s-sampling-rate : sampling rate, default is 48000
+ - samsung,i2s-bits-per-sample : sample width, defalut is 16 bit
+ - samsung,i2s-channels : nummber of channels, default is 2
+ - samsung,i2s-lr-clk-framesize : lr clock frame size
+ - samsung,i2s-bit-clk-framesize : bit clock frame size
+ - samsung,codec-type : sound codec type
+
+Example:
+
+sound@12d60000 {
+	compatible = "samsung,exynos-sound"
+	samsung,i2s-epll-clock-frequency = <192000000>;
+	samsung,i2s-sampling-rate = <48000>;
+	samsung,i2s-bits-per-sample = <16>;
+	samsung,i2s-channels = <2>;
+	samsung,i2s-lr-clk-framesize = <256>;
+	samsung,i2s-bit-clk-framesize = <32>;
+	samsung,codec-type = "wm8994";
+};