[PATCH v4 4/4] arm64: dts: cix: Add USB4/USB5 nodes for Sky1
From: Hongliang Yang
Date: Sat Sep 05 2026 - 23:27:53 EST
Add USB4 and USB5 controller nodes for the CIX Sky1 SoC. Enable USB4
and USB5 in host mode on the Radxa Orion O6 board.
The per-controller RCSU registers are accessed through a syscon regmap
referenced by the cix,usb-rcsu phandle.
The shared RCSU slice of the two controllers is described by a syscon
node; each controller references its registers through the cix,usb-rcsu
phandle with offsets.
Signed-off-by: Hongliang Yang <hongliang.yang@xxxxxxxxxxx>
---
arch/arm64/boot/dts/cix/sky1-orion-o6.dts | 42 +++++++++++
arch/arm64/boot/dts/cix/sky1.dtsi | 88 +++++++++++++++++++++++
2 files changed, 130 insertions(+)
diff --git a/arch/arm64/boot/dts/cix/sky1-orion-o6.dts b/arch/arm64/boot/dts/cix/sky1-orion-o6.dts
index b152942aaa60..4f47e8cd70fc 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 478c726fae96..2fe9e8244447 100644
--- a/arch/arm64/boot/dts/cix/sky1.dtsi
+++ b/arch/arm64/boot/dts/cix/sky1.dtsi
@@ -15,6 +15,11 @@ / {
#address-cells = <2>;
#size-cells = <2>;
+ aliases {
+ usb4 = &usb4;
+ usb5 = &usb5;
+ };
+
cpus {
#address-cells = <2>;
#size-cells = <0>;
@@ -576,6 +581,89 @@ mbox_ap2sfh: mailbox@80a0000 {
cix,mbox-dir = "tx";
};
+ usbss_rcsu45: syscon@91c0300 {
+ compatible = "cix,sky1-usbss-rcsu", "syscon";
+ reg = <0x00 0x091c0300 0x00 0x200>;
+ };
+
+ usb4: usb-4 {
+ compatible = "cix,sky1-usbssp";
+ ranges;
+ #address-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";
+ #size-cells = <2>;
+ cix,usb-rcsu = <&usbss_rcsu45 0x14 0x100>;
+ cix,usb-syscon = <&s5_syscon>;
+
+ 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_0>;
+ phy-names = "cdns3,usb3-phy";
+
+ status = "disabled";
+ };
+ };
+
+ usb5: usb-5 {
+ compatible = "cix,sky1-usbssp";
+ ranges;
+ #address-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";
+ #size-cells = <2>;
+ cix,usb-rcsu = <&usbss_rcsu45 0x24 0x110>;
+ cix,usb-syscon = <&s5_syscon>;
+
+ 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_1>;
+ phy-names = "cdns3,usb3-phy";
+
+ status = "disabled";
+ };
+ };
+
usb3_phy4: usb-phy@9210000 {
compatible = "cix,sky1-usb3-phy";
reg = <0x00 0x09210000 0x00 0x40000>;
--
2.54.0