From: Yixun Lan <dlan@kernel.org>
Date: Mon, 30 Mar 2026 22:15:21 +0000 (+0000)
Subject: riscv: dts: spacemit: k3: Add USB2.0 support
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3bd58f3060f28ecd30df51925a9b1f62e5e8c9b;p=thirdparty%2Fkernel%2Flinux.git

riscv: dts: spacemit: k3: Add USB2.0 support

There is one USB2.0 host in K3 SoC which use DWC3 IP but only provide
USB2.0 functionality, and with only one USB2 PHY connected.

The USB2.0 controller on Pico-ITX board connects to a Terminus FE1.1 Hub
which fully USB2.0 protocol compliant and provides 4 ports.

Link: https://patch.msgid.link/20260330-02-k3-usb20-dts-v2-1-46af262fb4a9@kernel.org
Signed-off-by: Yixun Lan <dlan@kernel.org>
---

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index 4486dc1fe114d..b89c1521e6649 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -26,6 +26,14 @@
 		reg = <0x1 0x00000000 0x4 0x00000000>;
 	};
 
+	reg_aux_vcc3v3: regulator-aux-vcc3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "AUX_VCC3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
 	reg_aux_vcc5v: regulator-aux-vcc5v {
 		compatible = "regulator-fixed";
 		regulator-name = "AUX_VCC5V";
@@ -197,3 +205,19 @@
 	pinctrl-0 = <&uart0_0_cfg>;
 	status = "okay";
 };
+
+&usb2_host {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	hub@1 {
+		compatible = "usb1a40,0101";
+		reg = <1>;
+		vdd-supply = <&reg_aux_vcc3v3>;
+	};
+};
+
+&usb2_phy {
+	status = "okay";
+};
diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
index e6faf8d8759e1..23cca70f796be 100644
--- a/arch/riscv/boot/dts/spacemit/k3.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
@@ -438,6 +438,37 @@
 		dma-noncoherent;
 		ranges;
 
+		usb2_host: usb@c0a00000 {
+			compatible = "spacemit,k3-dwc3";
+			reg = <0x0 0xc0a00000 0x0 0x10000>;
+			clocks = <&syscon_apmu CLK_APMU_USB2_BUS>;
+			clock-names = "usbdrd30";
+			resets = <&syscon_apmu RESET_APMU_USB2_AHB>,
+				 <&syscon_apmu RESET_APMU_USB2_VCC>,
+				 <&syscon_apmu RESET_APMU_USB2_PHY>;
+			reset-names = "ahb", "vcc", "phy";
+			interrupts = <105 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&saplic>;
+			phys = <&usb2_phy>;
+			phy-names = "usb2-phy";
+			phy_type = "utmi";
+			snps,dis_enblslpm_quirk;
+			snps,dis_u2_susphy_quirk;
+			snps,dis-del-phy-power-chg-quirk;
+			snps,dis-tx-ipgap-linecheck-quirk;
+			dr_mode = "host";
+			maximum-speed = "high-speed";
+			status = "disabled";
+		};
+
+		usb2_phy: phy@c0a20000 {
+			compatible = "spacemit,k3-usb2-phy";
+			reg = <0x0 0xc0a20000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_APMU_USB2_BUS>;
+			#phy-cells = <0>;
+			status = "disabled";
+		};
+
 		eth0: ethernet@cac80000 {
 			compatible = "spacemit,k3-dwmac", "snps,dwmac-5.40a";
 			reg = <0x0 0xcac80000 0x0 0x2000>;