ARM: bcm2835: Add PWM clock support to the device tree

Signed-off-by: Remi Pommarel <repk@triplefau.lt>
[anholt: Rebased on 2835.dtsi -> 283x.dtsi change]
Signed-off-by: Eric Anholt <eric@anholt.net>

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

@@ -58,3 +58,7 @@ &sdhci {
 	status = "okay";
 	bus-width = <4>;
 };
+
+&pwm {
+	status = "okay";
+};

arch/arm/boot/dts/bcm283x.dtsi

@@ -180,6 +180,16 @@ spi2: spi@7e2150c0 {
 			status = "disabled";
 		};
 
+		pwm: pwm@7e20c000 {
+			compatible = "brcm,bcm2835-pwm";
+			reg = <0x7e20c000 0x28>;
+			clocks = <&clocks BCM2835_CLOCK_PWM>;
+			assigned-clocks = <&clocks BCM2835_CLOCK_PWM>;
+			assigned-clock-rates = <10000000>;
+			#pwm-cells = <2>;
+			status = "disabled";
+		};
+
 		sdhci: sdhci@7e300000 {
 			compatible = "brcm,bcm2835-sdhci";
 			reg = <0x7e300000 0x100>;