From: Ricardo Pardini <ricardo@pardini.net>

The Radxa ROCK 5B / 5B+ / 5T all carry on-board Realtek RTL8125 NICs.

Describe the fixed function nodes and attach ethernet0/ethernet1
aliases, so that U-Boot's fdt_fixup_ethernet() can inject mac-address
properties from its ethaddr/eth1addr env, for stable MACs across
boots that both U-Boot and the kernel agree on.

The RTL8125 on pcie2x1l2 is shared by all three variants. The ROCK 5T
additionally describes pcie2x1l1 with its second RTL8125.

Signed-off-by: Ricardo Pardini <ricardo@pardini.net>
---
 .../arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi | 15 +++++++++++++++
 arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts        | 18 ++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi
index bf4a1d2e55ca3..b53dfe6848cce 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi
@@ -10,6 +10,7 @@
 
 / {
 	aliases {
+		ethernet0 = &rtl_eth0;
 		mmc0 = &sdhci;
 		mmc1 = &sdmmc;
 		mmc2 = &sdio;
@@ -482,6 +483,20 @@ &pcie2x1l2 {
 	reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_pcie2x1l2>;
 	status = "okay";
+
+	pcie@0,0 {
+		reg = <0x400000 0 0 0 0>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		ranges;
+		device_type = "pci";
+		bus-range = <0x41 0x4f>;
+
+		rtl_eth0: ethernet@0,0 {
+			compatible = "pci10ec,8125";
+			reg = <0x410000 0 0 0 0>;
+		};
+	};
 };
 
 &pcie30phy {
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts
index 425036146b6d9..b1a3e4b2165f9 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts
@@ -8,6 +8,10 @@ / {
 	model = "Radxa ROCK 5T";
 	compatible = "radxa,rock-5t", "rockchip,rk3588";
 
+	aliases {
+		ethernet1 = &rtl_eth1;
+	};
+
 	analog-sound {
 		compatible = "audio-graph-card";
 		label = "rk3588-es8316";
@@ -76,6 +80,20 @@ &pcie2x1l1 {
 	reset-gpios = <&gpio4 RK_PA2 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_pcie2x1l1>;
 	status = "okay";
+
+	pcie@0,0 {
+		reg = <0x300000 0 0 0 0>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		ranges;
+		device_type = "pci";
+		bus-range = <0x31 0x3f>;
+
+		rtl_eth1: ethernet@0,0 {
+			compatible = "pci10ec,8125";
+			reg = <0x310000 0 0 0 0>;
+		};
+	};
 };
 
 &pcie30phy {

-- 
2.54.0