[PATCH 18/21] arm64: dts: allwinner: orangepi-zero2w: enable Ethernet expansion

The optional Orange Pi Zero 2W expansion board exposes H618 EMAC1 through
a 100 Mbit Ethernet jack.

Add a reusable H616-family description of the AC200/AC300 EPHY wiring
alongside its first board user. The forced-ID link PHY selects the
populated control path and AC300 tuning range from the logical SID
configuration field. Keep the AC200 I2C controller and AC300 MDIO control
node at status fail-needs-probe so only the selected path claims its pins.

Enable EMAC1 and its PWM clock provider through the common include,
provide the board's 3.3 V rail to either companion variant, and make EMAC1
the board Ethernet alias.

Signed-off-by: James Hilliard <[email protected]>
---
 .../boot/dts/allwinner/sun50i-h616-acx00-ephy.dtsi | 61 ++++++++++++++++++++++
 .../dts/allwinner/sun50i-h618-orangepi-zero2w.dts  | 13 +++++
 2 files changed, 74 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-acx00-ephy.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616-acx00-ephy.dtsi
new file mode 100644
index 000000000000..26521429957a
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-acx00-ephy.dtsi
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Common X-Powers AC200/AC300 Ethernet PHY support for H616-family SoCs
+ *
+ * Copyright (C) 2026 James Hilliard <[email protected]>
+ */
+
+&emac1 {
+	phy-handle = <&acx00_ephy>;
+	status = "okay";
+};
+
+&i2c3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c3_pa_pins>;
+	status = "fail-needs-probe";
+
+	ac200: mixed-signal@10 {
+		compatible = "x-powers,ac200";
+		reg = <0x10>;
+		clocks = <&pwm 5>;
+		nvmem-cells = <&ac200_bandgap>;
+		nvmem-cell-names = "bandgap";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pwm5_pin>;
+
+		ac200_ephy_ctl: ethernet-phy-control {
+			compatible = "x-powers,ac200-ephy-ctl";
+			nvmem-cells = <&ephy_calibration>;
+			nvmem-cell-names = "calibration";
+			phy-mode = "rmii";
+		};
+	};
+};
+
+&mdio1 {
+	ac300_ephy_ctl: ethernet-phy-control@10 {
+		compatible = "x-powers,ac300-ephy-ctl";
+		reg = <0x10>;
+		clocks = <&pwm 5>;
+		nvmem-cells = <&ephy_calibration>;
+		nvmem-cell-names = "calibration";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pwm5_pin>;
+		phy-mode = "rmii";
+		status = "fail-needs-probe";
+	};
+
+	acx00_ephy: ethernet-phy@0 {
+		compatible = "ethernet-phy-id0044.1400";
+		reg = <0>;
+		nvmem-cells = <&ephy_config>;
+		nvmem-cell-names = "configuration";
+		x-powers,ac200-control = <&ac200_ephy_ctl>;
+		x-powers,ac300-control = <&ac300_ephy_ctl>;
+	};
+};
+
+&pwm {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h618-orangepi-zero2w.dts b/arch/arm64/boot/dts/allwinner/sun50i-h618-orangepi-zero2w.dts
index b340bbcb710d..e833ee267c83 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h618-orangepi-zero2w.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h618-orangepi-zero2w.dts
@@ -6,6 +6,7 @@
 /dts-v1/;
 
 #include "sun50i-h616.dtsi"
+#include "sun50i-h616-acx00-ephy.dtsi"
 #include "sun50i-h616-cpu-opp.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>
@@ -17,6 +18,7 @@ / {
 	compatible = "xunlong,orangepi-zero2w", "allwinner,sun50i-h618";
 
 	aliases {
+		ethernet0 = &emac1;
 		serial0 = &uart0;
 	};
 
@@ -54,6 +56,17 @@ reg_vcc3v3: vcc3v3 {
 	};
 };
 
+&ac200 {
+	ac-ldoin-supply = <&reg_vcc3v3>;
+	ephy-vcc-supply = <&reg_vcc3v3>;
+	rtc-vcc-supply = <&reg_vcc3v3>;
+	tv-vcc-supply = <&reg_vcc3v3>;
+};
+
+&ac300_ephy_ctl {
+	vcc1-supply = <&reg_vcc3v3>;
+};
+
 &codec {
 	allwinner,audio-routing = "Line Out", "LINEOUT";
 	status = "okay";

-- 
2.53.0