[PATCH v2] ARM: dts: sun8i: h3: Enable EMAC with external PHY on NanoPi M1 Plus

The Nanopi M1 Plus uses an external Realtek RTL8211E PHY in RGMII mode,
enabled by a GPIO-based regulator.

Signed-off-by: Luis Araneda <redacted>

---
Changes v1 -> v2:
- Removed unnecessary property
- Corrected part address to match reg value

 arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts | 30 +++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts b/arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts
index 8ddd1b2cc..1273a5e45 100644
--- a/arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts
+++ b/arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts

@@ -45,6 +45,20 @@
 / {
        model = "FriendlyArm NanoPi M1 Plus";
        compatible = "friendlyarm,nanopi-m1-plus", "allwinner,sun8i-h3";
+
+       aliases {
+               ethernet0 = &emac;
+       };
+
+       reg_gmac_3v3: gmac-3v3 {
+               compatible = "regulator-fixed";
+               regulator-name = "gmac-3v3";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               startup-delay-us = <100000>;
+               enable-active-high;
+               gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>; /* PD6 */
+       };
 };

 &ehci1 {

@@ -55,6 +69,22 @@
        status = "okay";
 };

+&emac {
+       pinctrl-names = "default";
+       pinctrl-0 = <&emac_rgmii_pins>;
+       phy-supply = <&reg_gmac_3v3>;
+       phy-handle = <&ext_rgmii_phy>;
+       phy-mode = "rgmii";
+       status = "okay";
+};
+
+&mdio {
+       ext_rgmii_phy: ethernet-phy at 0 {
+               compatible = "ethernet-phy-ieee802.3-c22";
+               reg = <0>;