[PATCH v4 2/4] arm64: dts: intel: agilex5: add USB3.1 controller node

[Adrian Ng Ho Yin]

Add a DTS node for the Synopsys DWC3 USB3.1 controller on the Agilex5 SoC.
Place it under a simple-bus with a 40-bit dma-ranges window (#address-cells
= 2) to match the USB DMA address width of the interconnect. Enable it in
host mode on the SoCDK board.

ref and suspend both use AGILEX5_USB31_SUSPEND_CLK because they share the
same hardware clock source on this SoC.

Signed-off-by: Adrian Ng Ho Yin <adrian.ho.yin.ng@xxxxxxxxxx>
---
 .../arm64/boot/dts/intel/socfpga_agilex5.dtsi | 35 +++++++++++++++++++
 .../boot/dts/intel/socfpga_agilex5_socdk.dts  |  5 +++
 2 files changed, 40 insertions(+)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
index f54767d1526e..523f722a2a64 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
@@ -493,6 +493,41 @@ usb0: usb@10b00000 {
 			status = "disabled";
 		};
 
+		usb31_bus: usb-bus@11000000 {
+			compatible = "simple-bus";
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges = <0x0 0x0 0x11000000 0x0 0x100000>;
+			/*
+			 * USB interconnect DMA is limited to 40-bit addresses
+			 * (1 TiB window from 0).
+			 */
+			dma-ranges = <0x0 0x0 0x0 0x100 0x0>;
+
+			usb31: usb@0 {
+				compatible = "altr,agilex5-dwc3";
+				reg = <0x0 0x0 0x0 0x100000>;
+				interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+				/*
+				 * ref and suspend share the same hardware
+				 * source; reuse the published suspend clock ID.
+				 */
+				clocks = <&clkmgr AGILEX5_USB31_BUS_CLK_EARLY>,
+					 <&clkmgr AGILEX5_USB31_SUSPEND_CLK>,
+					 <&clkmgr AGILEX5_USB31_SUSPEND_CLK>;
+				clock-names = "bus_early", "ref", "suspend";
+				resets = <&rst USB1_RESET>, <&rst USB1_OCP_RESET>;
+				reset-names = "core", "ecc";
+				iommus = <&smmu 7>;
+				phys = <&usbphy0>, <&usbphy0>;
+				phy-names = "usb2-phy", "usb3-phy";
+				maximum-speed = "super-speed";
+				snps,dis_u2_susphy_quirk;
+				snps,dis_u3_susphy_quirk;
+				status = "disabled";
+			};
+		};
+
 		watchdog0: watchdog@10d00200 {
 			compatible = "snps,dw-wdt";
 			reg = <0x10d00200 0x100>;
diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts b/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts
index 1e9b87d96765..aa9294494421 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts
@@ -109,6 +109,11 @@ &usb0 {
 	disable-over-current;
 };
 
+&usb31 {
+	dr_mode = "host";
+	status = "okay";
+};
+
 &watchdog0 {
 	status = "okay";
 };
-- 
2.49.GIT