ARM: sun4i: dt: Add ahci / sata support

This patch adds sunxi sata support to A10 boards that have such a connector.
Some boards also feature a regulator via a GPIO and support for this is also
added.
Signed-off-by: NOlliver Schinagl <oliver@schinagl.nl>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun4i-a10-a1000.dts

@@ -35,6 +35,10 @@
 			};
 		};
 
+		ahci: sata@01c18000 {
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			emac_power_pin_a1000: emac_power_pin@0 {
 				allwinner,pins = "PH15";

arch/arm/boot/dts/sun4i-a10-cubieboard.dts

@@ -12,6 +12,7 @@
 
 /dts-v1/;
 /include/ "sun4i-a10.dtsi"
+/include/ "sunxi-common-regulators.dtsi"
 
 / {
 	model = "Cubietech Cubieboard";
@@ -33,6 +34,11 @@
 			};
 		};
 
+		ahci: sata@01c18000 {
+			target-supply = <&reg_ahci_5v>;
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			led_pins_cubieboard: led_pins@0 {
 				allwinner,pins = "PH20", "PH21";
@@ -77,4 +83,8 @@
 			linux,default-trigger = "heartbeat";
 		};
 	};
+
+	reg_ahci_5v: ahci-5v {
+		status = "okay";
+	};
 };

arch/arm/boot/dts/sun4i-a10.dtsi

@@ -388,6 +388,14 @@
 			#size-cells = <0>;
 		};
 
+		ahci: sata@01c18000 {
+			compatible = "allwinner,sun4i-a10-ahci";
+			reg = <0x01c18000 0x1000>;
+			interrupts = <56>;
+			clocks = <&pll6 0>, <&ahb_gates 25>;
+			status = "disabled";
+		};
+
 		spi3: spi@01c1f000 {
 			compatible = "allwinner,sun4i-a10-spi";
 			reg = <0x01c1f000 0x1000>;