[PATCH 6/6] arm64: dts: allwinner: a523: x96qpro+: enable Ethernet support

The X96QPro+ TV Box features a Gigabit Ethernet capable port, which is
driven by the secondary EMAC, and supported by a Maxio MAE0621A PHY.

Add the required devicetree nodes to enable that port.

The PHY is not clocked by an external crystal oscillator, but relies on a
SoC-provided clock fanout pin for its 25 MHz reference input clock. The
clock is referenced in the PHY DT node, which not all systems might enable
before scanning the MDIO bus. To help with that problem, the PHY compatible
string is using the PHY ID, which means the MDIO bus scanning can be
skipped.

Signed-off-by: Andre Przywara <[email protected]>
---
 .../dts/allwinner/sun55i-h728-x96qpro+.dts    | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun55i-h728-x96qpro+.dts b/arch/arm64/boot/dts/allwinner/sun55i-h728-x96qpro+.dts
index a96927fbdadd..568a4fae84df 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-h728-x96qpro+.dts
+++ b/arch/arm64/boot/dts/allwinner/sun55i-h728-x96qpro+.dts
@@ -13,6 +13,7 @@ / {
 
 	aliases {
 		serial0 = &uart0;
+		ethernet0 = &gmac1;
 	};
 
 	chosen {
@@ -54,11 +55,38 @@ &ehci1 {
 	status = "okay";
 };
 
+&gmac1 {
+	clocks = <&ccu CLK_BUS_EMAC1>, <&ccu CLK_MBUS_EMAC1>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii1_pins>;
+	phy-mode = "rgmii-id";
+	phy-handle = <&ext_rgmii_phy>;
+	phy-supply = <&reg_cldo3>;
+
+	tx-internal-delay-ps = <200>;
+	rx-internal-delay-ps = <500>;
+
+	status = "okay";
+};
+
 &gpu {
 	mali-supply = <&reg_dcdc2>;
 	status = "okay";
 };
 
+&mdio1 {
+	ext_rgmii_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-id7b74.4411";
+		reg = <1>;
+		clocks = <&ccu CLK_EMAC1_25M>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&ephy_25m_pin>;
+		reset-gpios = <&pio 9 16 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <10000>;
+		reset-deassert-us = <150000>;
+	};
+};
+
 &mmc0 {
 	vmmc-supply = <&reg_vcc3v3>;
 	cd-gpios = <&pio 5 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>; /* PF6 */
-- 
2.43.0