[PATCH v6 3/3] arm64: dts: cix: Add USB4/USB5 nodes for Sky1

From: Hongliang Yang (杨宏亮) <hidden>
Date: 2026-11-05 01:18:15
Also in: linux-devicetree, linux-usb, lkml
Reply to: Hongliang Yang (杨宏亮), 2026-11-05

Add USB4 and USB5 controller nodes for the CIX Sky1 SoC. Enable USB4
and USB5 in host mode on the Radxa Orion O6 board.

Each controller node is placed at the address of its glue registers in
the RCSU and contains the Cadence USBSSP core child node at the core
address. The mode strap register offset and bit position are passed as
arguments of the cix,usb-syscon phandle.

Signed-off-by: Hongliang Yang <redacted>
---
Changes in v6:
- Drop the simple-bus RCSU container and the translated register
  offsets; place each controller node at its real address.
- Drop the usb4/usb5 aliases and pass the mode strap register offset
  and bit position through the cix,usb-syscon phandle.
- Reference the shared USB3 PHY through its single phandle.
---
 arch/arm64/boot/dts/cix/sky1-orion-o6.dts | 42 +++++++++++
 arch/arm64/boot/dts/cix/sky1.dtsi         | 85 +++++++++++++++++++++++
 2 files changed, 127 insertions(+)

diff --git a/arch/arm64/boot/dts/cix/sky1-orion-o6.dts b/arch/arm64/boot/dts/cix/sky1-orion-o6.dts
index 5d57dd9ea299..d07fad302050 100644
--- a/arch/arm64/boot/dts/cix/sky1-orion-o6.dts
+++ b/arch/arm64/boot/dts/cix/sky1-orion-o6.dts

@@ -80,6 +80,22 @@ pins {
 
 		};
 	};
+
+	pinctrl_usb4: usb4-power-on-cfg {
+		pins {
+			bias-pull-down;
+			drive-strength = <8>;
+			pinmux = <CIX_PAD_GPIO041_FUNC_USB_DRIVE_VBUS4>;
+		};
+	};
+
+	pinctrl_usb5: usb5-power-on-cfg {
+		pins {
+			bias-pull-down;
+			drive-strength = <8>;
+			pinmux = <CIX_PAD_GPIO042_FUNC_USB_DRIVE_VBUS5>;
+		};
+	};
 };
 
 &pcie_x8_rc {

@@ -118,6 +134,32 @@ &uart2 {
 	status = "okay";
 };
 
+&usb4 {
+	pinctrl-0 = <&pinctrl_usb4>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+&usbss_4 {
+	dr_mode = "host";
+
+	status = "okay";
+};
+
+&usb5 {
+	pinctrl-0 = <&pinctrl_usb5>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+&usbss_5 {
+	dr_mode = "host";
+
+	status = "okay";
+};
+
 &usb3_phy4 {
 	status = "okay";
 };

diff --git a/arch/arm64/boot/dts/cix/sky1.dtsi b/arch/arm64/boot/dts/cix/sky1.dtsi
index c081b63a9848..ae66dca53894 100644
--- a/arch/arm64/boot/dts/cix/sky1.dtsi
+++ b/arch/arm64/boot/dts/cix/sky1.dtsi

@@ -606,6 +606,90 @@ mbox_ap2sfh: mailbox@80a0000 {
 			cix,mbox-dir = "tx";
 		};
 
+		usb4: usb@91c0314 {
+			compatible = "cix,sky1-usbssp";
+			reg = <0x00 0x091c0314 0x00 0x10>,
+			      <0x00 0x091c0400 0x00 0x10>;
+			reg-names = "axi", "status";
+			ranges;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			clocks = <&scmi_clk CLK_TREE_USB3A_H0_CLK_SOF>,
+				<&scmi_clk CLK_TREE_USB3A_0_AXI_GATE>,
+				<&scmi_clk CLK_TREE_USB3A_H0_CLK_LPM>,
+				<&scmi_clk CLK_TREE_USB3A_0_APB_GATE>;
+			clock-names = "sof", "axi", "lpm", "apb";
+			resets = <&s5_syscon SKY1_USBC_SS2_PRST_N>,
+				<&s5_syscon SKY1_USBC_SS2_RST_N>;
+			reset-names = "apb", "core";
+			/* USB3 Type-A controller 0 mode strap */
+			cix,usb-syscon = <&s5_syscon 0x424 8>;
+
+			status = "disabled";
+
+			usbss_4: usb@91d0000 {
+				compatible = "cdns,usb3";
+				reg = <0x00 0x91d0000 0x00 0x4000>,
+				      <0x00 0x91d8000 0x00 0x8000>,
+				      <0x00 0x91d4000 0x00 0x4000>;
+				reg-names = "otg", "xhci", "dev";
+				dr_mode = "otg";
+				interrupts = <GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH 0>,
+					<GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH 0>,
+					<GIC_SPI 253 IRQ_TYPE_LEVEL_HIGH 0>,
+					<GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH 0>;
+				interrupt-names = "host", "peripheral",
+					"otg", "wakeup";
+				maximum-speed = "super-speed-plus";
+				phys = <&usb3_phy4>;
+				phy-names = "cdns3,usb3-phy";
+
+				status = "disabled";
+			};
+		};
+
+		usb5: usb@91c0324 {
+			compatible = "cix,sky1-usbssp";
+			reg = <0x00 0x091c0324 0x00 0x10>,
+			      <0x00 0x091c0410 0x00 0x10>;
+			reg-names = "axi", "status";
+			ranges;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			clocks = <&scmi_clk CLK_TREE_USB3A_H1_CLK_SOF>,
+				<&scmi_clk CLK_TREE_USB3A_1_AXI_GATE>,
+				<&scmi_clk CLK_TREE_USB3A_H1_CLK_LPM>,
+				<&scmi_clk CLK_TREE_USB3A_1_APB_GATE>;
+			clock-names = "sof", "axi", "lpm", "apb";
+			resets = <&s5_syscon SKY1_USBC_SS3_PRST_N>,
+				<&s5_syscon SKY1_USBC_SS3_RST_N>;
+			reset-names = "apb", "core";
+			/* USB3 Type-A controller 1 mode strap */
+			cix,usb-syscon = <&s5_syscon 0x424 10>;
+
+			status = "disabled";
+
+			usbss_5: usb@91e0000 {
+				compatible = "cdns,usb3";
+				reg = <0x00 0x91e0000 0x00 0x4000>,
+				      <0x00 0x91e8000 0x00 0x8000>,
+				      <0x00 0x91e4000 0x00 0x4000>;
+				reg-names = "otg", "xhci", "dev";
+				dr_mode = "otg";
+				interrupts = <GIC_SPI 257 IRQ_TYPE_LEVEL_HIGH 0>,
+					<GIC_SPI 257 IRQ_TYPE_LEVEL_HIGH 0>,
+					<GIC_SPI 258 IRQ_TYPE_LEVEL_HIGH 0>,
+					<GIC_SPI 257 IRQ_TYPE_LEVEL_HIGH 0>;
+				interrupt-names = "host", "peripheral",
+					"otg", "wakeup";
+				maximum-speed = "super-speed-plus";
+				phys = <&usb3_phy4>;
+				phy-names = "cdns3,usb3-phy";
+
+				status = "disabled";
+			};
+		};
+
 		usb3_phy4: usb-phy@9210000 {
 			compatible = "cix,sky1-usb3-phy";
 			reg = <0x00 0x09210000 0x00 0x40000>;

@@ -780,6 +864,7 @@ s5_syscon: syscon@16000000 {
 			compatible = "cix,sky1-s5-system-control", "syscon";
 			reg = <0x0 0x16000000 0x0 0x1000>;
 			#reset-cells = <1>;
+			#syscon-cells = <2>;
 		};
 
 		s5_gpio0: gpio-controller@16004000 {

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