ARM: sunxi: Add sun4i and cubieboard support

This patch adds support for the Cubieboard based on the Allwinner
A10/sun4i SoC. Currently only UART is supported. Other devices
will eventually follow.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/arch/arm/boot/dts/sunxi.dtsi b/arch/arm/boot/dts/sunxi.dtsi
index 9e476de..8284fbd 100644
--- a/arch/arm/boot/dts/sunxi.dtsi
+++ b/arch/arm/boot/dts/sunxi.dtsi
@@ -54,6 +54,15 @@
 			#interrupt-cells = <1>;
 		};
 
+		uart0: uart@01c28000 {
+			compatible = "ns8250";
+			reg = <0x01c28000 0x400>;
+			interrupts = <1>;
+			reg-shift = <2>;
+			clock-frequency = <24000000>;
+			status = "disabled";
+		};
+
 		uart1: uart@01c28400 {
 			compatible = "ns8250";
 			reg = <0x01c28400 0x400>;