arm64: allwinner: h5: enable dwmac-sun8i for Nano Pi NEO2

Add the required DT parts to enable Ethernet (dwmac-sun8i driver) on
the Nano Pi NEO2 board. It uses an external Realtek RTL8211E PHY
connected via RGMII to provide GbE network. Specially unlike other
Allwinner boards, the phy is connected to MDIO address 7, not 1.

This includes the regulator (which is controlled by a GPIO pin) and
the actual Ethernet MAC node, referring the RGMII pins of the device.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
index f2767b99c28a7666ca1422541f20b6212a9782be..9689087611945ff8f7bd3413d1c4b3e39ad14357 100644 (file)
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
@@ -50,6 +50,7 @@
        compatible = "friendlyarm,nanopi-neo2", "allwinner,sun50i-h5";
 
        aliases {
+               ethernet0 = &emac;
                serial0 = &uart0;
        };
 
@@ -72,6 +73,16 @@
                };
        };
 
+       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>;
+       };
+
        reg_vcc3v3: vcc3v3 {
                compatible = "regulator-fixed";
                regulator-name = "vcc3v3";
@@ -98,6 +109,22 @@
        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@7 {
+               compatible = "ethernet-phy-ieee802.3-c22";
+               reg = <7>;
+       };
+};
+
 &mmc0 {
        pinctrl-names = "default";
        pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin>;