ARM: bcm2835: add I2S pinctrl to device tree

Signed-off-by: Florian Meier <florian.meier@koalo.de>
[Tweaked slightly to disable by default -- broonie]
Signed-off-by: Mark Brown <broonie@linaro.org>
[swarren, removed duplicate i2s node]
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/bcm2835-rpi-b.dts

@@ -23,7 +23,7 @@ act {
 
 &gpio {
 	pinctrl-names = "default";
-	pinctrl-0 = <&gpioout &alt0 &alt3>;
+	pinctrl-0 = <&gpioout &alt0 &alt2 &alt3>;
 
 	gpioout: gpioout {
 		brcm,pins = <6>;
@@ -39,6 +39,12 @@ alt3: alt3 {
 		brcm,pins = <48 49 50 51 52 53>;
 		brcm,function = <7>; /* alt3 */
 	};
+
+	/* I2S interface */
+	alt2: alt2 {
+		brcm,pins = <28 29 30 31>;
+		brcm,function = <6>; /* alt2 */
+	};
 };
 
 &i2c0 {

arch/arm/boot/dts/bcm2835.dtsi

@@ -99,6 +99,7 @@ i2s: i2s@7e203000 {
 			dmas = <&dma 2>,
 			       <&dma 3>;
 			dma-names = "tx", "rx";
+			status = "disabled";
 		};
 
 		spi: spi@7e204000 {