linux-kernel - [PATCH 1/3] riscv: dts: spacemit: Add USB2 PHY node for K1

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Message-Id: <20251101-k1-usb3dts-v1-1-dd2660e5740b@linux.dev>
Date: Sat, 01 Nov 2025 17:03:25 +0800
From: Ze Huang <huang.ze@...ux.dev>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <pjw@...nel.org>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>, Yixun Lan <dlan@...too.org>
Cc: devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Ze Huang <huang.ze@...ux.dev>
Subject: [PATCH 1/3] riscv: dts: spacemit: Add USB2 PHY node for K1

K1's DWC3 USB 3.0 controller requires two separate PHYs to function:
the USB 3.0 combophy (for SuperSpeed) and a USB 2.0 PHY (for High-Speed,
Full-Speed, etc.).

Add node for this second USB 2.0 PHY (usbphy2).

Signed-off-by: Ze Huang <huang.ze@...ux.dev>
---
 arch/riscv/boot/dts/spacemit/k1.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index 214216fdecd3..d4d3c6d88a29 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -359,6 +359,14 @@ syscon_rcpu2: system-controller@...88000 {
 			#reset-cells = <1>;
 		};
 
+		usbphy2: phy@...30000 {
+			compatible = "spacemit,k1-usb2-phy";
+			reg = <0x0 0xc0a30000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_USB30>;
+			#phy-cells = <0>;
+			status = "disabled";
+		};
+
 		combo_phy: phy@...10000 {
 			compatible = "spacemit,k1-combo-phy";
 			reg = <0x0 0xc0b10000 0x0 0x1000>;

-- 
2.51.2