[PATCH v3 2/2] arm64: dts: rockchip: Enable Ethernet controller on Radxa E20C

[Jonas Karlman <jonas@kwiboo.se>]

The Radxa E20C has two GbE ports, LAN and WAN. The LAN port is provided
using a GMAC controller and a YT8531C PHY and the WAN port is provided
by an RTL8111H PCIe Ethernet controller.

Enable support for the LAN port on Radxa E20C.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
Changes in v3:
- Rebase on top of latest mmind/for-next

Changes in v2:
- Rebase on top of the "Support I2C controllers in RK3528" series [1]

[1] https://lore.kernel.org/r/20250309070603.35254-1-ziyao@disroot.org
---
 .../boot/dts/rockchip/rk3528-radxa-e20c.dts   | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
index d45b6594b2de..506d54337ece 100644
--- a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
@@ -17,6 +17,7 @@ / {
 	compatible = "radxa,e20c", "rockchip,rk3528";
 
 	aliases {
+		ethernet0 = &gmac1;
 		mmc0 = &sdhci;
 		mmc1 = &sdmmc;
 	};
@@ -184,6 +185,17 @@ &cpu3 {
 	cpu-supply = <&vdd_arm>;
 };
 
+&gmac1 {
+	clock_in_out = "output";
+	phy-handle = <&rgmii_phy>;
+	phy-mode = "rgmii-id";
+	phy-supply = <&vcc_3v3>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii_miim>, <&rgmii_tx_bus2>, <&rgmii_rx_bus2>,
+		    <&rgmii_rgmii_clk>, <&rgmii_rgmii_bus>;
+	status = "okay";
+};
+
 &i2c1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c1m0_xfer>;
@@ -198,7 +210,25 @@ eeprom@50 {
 	};
 };
 
+&mdio1 {
+	rgmii_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0x1>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&gmac1_rstn_l>;
+		reset-assert-us = <20000>;
+		reset-deassert-us = <100000>;
+		reset-gpios = <&gpio4 RK_PC2 GPIO_ACTIVE_LOW>;
+	};
+};
+
 &pinctrl {
+	ethernet {
+		gmac1_rstn_l: gmac1-rstn-l {
+			rockchip,pins = <4 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	gpio-keys {
 		user_key: user-key {
 			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_up>;
-- 
2.49.0