arm64: dts: rockchip: add USB-C support for ROCK 5B/5B+/5T

Add hardware description for the USB-C port in the Radxa ROCK 5 Model B
family. This describes the OHCI, EHCI and XHCI USB parts. The DisplayPort
AltMode is only partially described, as bindings for the necessary
DisplayPort controller are still being reviewed.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20250819-rock5bp-for-upstream-v4-1-7a2365ce7176@kernel.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

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

@@ -5,6 +5,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/soc/rockchip,vop2.h>
+#include <dt-bindings/usb/pd.h>
 #include "rk3588.dtsi"
 
 / {
@@ -55,6 +56,18 @@
 		shutdown-gpios = <&gpio3 RK_PD5 GPIO_ACTIVE_HIGH>;
 	};
 
+	vbus5v0_typec: vbus5v0-typec {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpio2 RK_PB6 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vbus5v0_typec_en>;
+		regulator-name = "vbus5v0_typec";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
 	vcc3v3_pcie2x1l0: regulator-vcc3v3-pcie2x1l0 {
 		compatible = "regulator-fixed";
 		enable-active-high;
@@ -291,6 +304,76 @@
 	};
 };
 
+&i2c4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c4m1_xfer>;
+	status = "okay";
+
+	usbc0: usb-typec@22 {
+		compatible = "fcs,fusb302";
+		reg = <0x22>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <RK_PB4 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&usbc0_int>;
+		vbus-supply = <&vbus5v0_typec>;
+		/*
+		 * When the board is starting to send power-delivery messages
+		 * too late (5 seconds according to the specification), the
+		 * power-supply reacts with a hard-reset. That removes the
+		 * power from VBUS for some time, which resets te whole board.
+		 */
+		status = "fail";
+
+		usb_con: connector {
+			compatible = "usb-c-connector";
+			label = "USB-C";
+			data-role = "dual";
+			/* fusb302 supports PD Rev 2.0 Ver 1.2 */
+			pd-revision = /bits/ 8 <0x2 0x0 0x1 0x2>;
+			power-role = "sink";
+			try-power-role = "sink";
+			op-sink-microwatt = <1000000>;
+			sink-pdos =
+				<PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>,
+				<PDO_VAR(5000, 20000, 5000)>;
+
+			altmodes {
+				displayport {
+					svid = /bits/ 16 <0xff01>;
+					vdo = <0xffffffff>;
+				};
+			};
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					usbc0_hs: endpoint {
+						remote-endpoint = <&usb_host0_xhci_to_usbc0>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+					usbc0_ss: endpoint {
+						remote-endpoint = <&usbdp_phy0_ss>;
+					};
+				};
+
+				port@2 {
+					reg = <2>;
+					usbc0_sbu: endpoint {
+						remote-endpoint = <&usbdp_phy0_sbu>;
+					};
+				};
+			};
+		};
+	};
+};
+
 &i2c6 {
 	status = "okay";
 
@@ -445,6 +528,16 @@
 			rockchip,pins = <1 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	usb {
+		usbc0_int: usbc0-int {
+			rockchip,pins = <3 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		vbus5v0_typec_en: vbus5v0-typec-en {
+			rockchip,pins = <2 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
 };
 
 &pwm1 {
@@ -860,6 +953,14 @@
 	status = "okay";
 };
 
+&u2phy0 {
+	status = "okay";
+};
+
+&u2phy0_otg {
+	status = "okay";
+};
+
 &u2phy1 {
 	status = "okay";
 };
@@ -887,6 +988,27 @@
 	status = "okay";
 };
 
+&usbdp_phy0 {
+	mode-switch;
+	orientation-switch;
+	status = "okay";
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		usbdp_phy0_ss: endpoint@0 {
+			reg = <0>;
+			remote-endpoint = <&usbc0_ss>;
+		};
+
+		usbdp_phy0_sbu: endpoint@1 {
+			reg = <1>;
+			remote-endpoint = <&usbc0_sbu>;
+		};
+	};
+};
+
 &usbdp_phy1 {
 	status = "okay";
 };
@@ -899,6 +1021,17 @@
 	status = "okay";
 };
 
+&usb_host0_xhci {
+	usb-role-switch;
+	status = "okay";
+
+	port {
+		usb_host0_xhci_to_usbc0: endpoint {
+			remote-endpoint = <&usbc0_hs>;
+		};
+	};
+};
+
 &usb_host1_ehci {
 	status = "okay";
 };

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

@@ -99,12 +99,24 @@
 	};
 
 	usb {
+		usbc_sbu_dc: usbc-sbu-dc {
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>,
+					<0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
 		vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <1 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
 };
 
+&usbdp_phy0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usbc_sbu_dc>;
+	sbu1-dc-gpios = <&gpio0 RK_PC4 GPIO_ACTIVE_HIGH>;
+	sbu2-dc-gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+};
+
 &vcc5v0_host {
 	enable-active-high;
 	gpio = <&gpio1 RK_PA1 GPIO_ACTIVE_HIGH>;

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

@@ -38,12 +38,24 @@
 
 &pinctrl {
 	usb {
+		usbc_sbu_dc: usbc-sbu-dc {
+			rockchip,pins = <4 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>,
+					<4 RK_PA7 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
 		vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
 };
 
+&usbdp_phy0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usbc_sbu_dc>;
+	sbu1-dc-gpios = <&gpio4 RK_PA6 GPIO_ACTIVE_HIGH>;
+	sbu2-dc-gpios = <&gpio4 RK_PA7 GPIO_ACTIVE_HIGH>;
+};
+
 &vcc5v0_host {
 	enable-active-high;
 	gpio = <&gpio4 RK_PB0 GPIO_ACTIVE_HIGH>;

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

@@ -95,6 +95,20 @@
 			rockchip,pins = <4 RK_PC3 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	usb {
+		usbc_sbu_dc: usbc-sbu-dc {
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>,
+					<0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
+
+&usbdp_phy0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usbc_sbu_dc>;
+	sbu1-dc-gpios = <&gpio0 RK_PC4 GPIO_ACTIVE_HIGH>;
+	sbu2-dc-gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
 };
 
 &vcc3v3_pcie2x1l0 {