arm64: dts: rockchip: add PCIe network controller to rock-5b

Enable the RTL8125 network controller, which is connected via
PCIe.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230918141451.131247-2-sebastian.reichel@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts

@@ -44,6 +44,15 @@ fan: pwm-fan {
 		#cooling-cells = <2>;
 	};
 
+	vcc3v3_pcie2x1l2: vcc3v3-pcie2x1l2-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc3v3_pcie2x1l2";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		startup-delay-us = <5000>;
+		vin-supply = <&vcc_3v3_s3>;
+	};
+
 	vcc5v0_host: vcc5v0-host-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc5v0_host";
@@ -78,6 +87,10 @@ vcc_1v1_nldo_s3: vcc-1v1-nldo-s3-regulator {
 	};
 };
 
+&combphy0_ps {
+	status = "okay";
+};
+
 &cpu_b0 {
 	cpu-supply = <&vdd_cpu_big0_s0>;
 };
@@ -204,6 +217,14 @@ i2s0_8ch_p0_0: endpoint {
 	};
 };
 
+&pcie2x1l2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie2_2_rst>;
+	reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc3v3_pcie2x1l2>;
+	status = "okay";
+};
+
 &pinctrl {
 	hym8563 {
 		hym8563_int: hym8563-int {
@@ -217,6 +238,12 @@ hp_detect: hp-detect {
 		};
 	};
 
+	pcie2 {
+		pcie2_2_rst: pcie2-2-rst {
+			rockchip,pins = <3 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	usb {
 		vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;