ARM: sunxi: Add EMAC Controller to Hackberry dt

The Hackberry has a PHY that needs to be powered up through a GPIO, so
we need to use a fixed regulator here.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -23,10 +23,51 @@ chosen {
 	};
 
 	soc@01c20000 {
+		emac: ethernet@01c0b000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&emac_pins_a>;
+			phy = <&phy0>;
+			status = "okay";
+		};
+
+		mdio@01c0b080 {
+			phy-supply = <&reg_emac_3v3>;
+			status = "okay";
+
+			phy0: ethernet-phy@0 {
+				reg = <0>;
+			};
+		};
+
+		pio: pinctrl@01c20800 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&hackberry_hogs>;
+
+			hackberry_hogs: hogs@0 {
+				allwinner,pins = "PH19";
+				allwinner,function = "gpio_out";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+		};
+
 		uart0: serial@01c28000 {
 			pinctrl-names = "default";
 			pinctrl-0 = <&uart0_pins_a>;
 			status = "okay";
 		};
 	};
+
+	regulators {
+		compatible = "simple-bus";
+
+		reg_emac_3v3: emac-3v3 {
+			compatible = "regulator-fixed";
+			regulator-name = "emac-3v3";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			enable-active-high;
+			gpio = <&pio 7 19 0>;
+		};
+	};
 };