netdev - [PATCH 08/15] arm64: dts: mediatek: mt7981b-openwrt-one: Enable PCIe and USB

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Message-Id: <20251016-openwrt-one-network-v1-8-de259719b6f2@collabora.com>
Date: Thu, 16 Oct 2025 12:08:44 +0200
From: Sjoerd Simons <sjoerd@...labora.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Ryder Lee <ryder.lee@...iatek.com>, 
 Jianjun Wang <jianjun.wang@...iatek.com>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Manivannan Sadhasivam <mani@...nel.org>, 
 Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Lee Jones <lee@...nel.org>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Lorenzo Bianconi <lorenzo@...nel.org>, Felix Fietkau <nbd@....name>
Cc: kernel@...labora.com, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-pci@...r.kernel.org, 
 linux-phy@...ts.infradead.org, netdev@...r.kernel.org, 
 Daniel Golle <daniel@...rotopia.org>, Bryan Hinton <bryan@...anhinton.com>, 
 Sjoerd Simons <sjoerd@...labora.com>
Subject: [PATCH 08/15] arm64: dts: mediatek: mt7981b-openwrt-one: Enable
 PCIe and USB

Enable the PCIe controller and USB3 XHCI host on the OpenWrt One
board. The USB controller is configured for USB 2.0 only mode, as the
shared USB3/PCIe PHY is dedicated to PCIe functionality on this board.

Signed-off-by: Sjoerd Simons <sjoerd@...labora.com>
---
 .../boot/dts/mediatek/mt7981b-openwrt-one.dts      | 43 ++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
index f836059d7f475..b6ca628ee72fd 100644
--- a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
@@ -20,9 +20,40 @@ memory@...00000 {
 		reg = <0 0x40000000 0 0x40000000>;
 		device_type = "memory";
 	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_5v: regulator-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_pins>;
+	status = "okay";
 };

 &pio {
+	pcie_pins: pcie-pins {
+		mux {
+			function = "pcie";
+			groups = "pcie_pereset";
+		};
+	};
+
 	uart0_pins: uart0-pins {
 		mux {
 			function = "uart";
@@ -36,3 +67,15 @@ &uart0 {
 	pinctrl-0 = <&uart0_pins>;
 	status = "okay";
 };
+
+&usb_phy {
+	status = "okay";
+};
+
+&xhci {
+	phys = <&u2port0 PHY_TYPE_USB2>;
+	vusb33-supply = <&reg_3p3v>;
+	vbus-supply = <&reg_5v>;
+	mediatek,u3p-dis-msk = <0x01>;
+	status = "okay";
+};

-- 
2.51.0