linux-kernel - [PATCH V2 05/10] arm: dts: imx7d: Add Root Port node and PERST property

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Message-Id: <20260123021445.3782170-6-sherry.sun@nxp.com>
Date: Fri, 23 Jan 2026 10:14:40 +0800
From: Sherry Sun <sherry.sun@....com>
To: hongxing.zhu@....com,
	l.stach@...gutronix.de,
	lpieralisi@...nel.org,
	kwilczynski@...nel.org,
	mani@...nel.org,
	robh@...nel.org,
	bhelgaas@...gle.com,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	festevam@...il.com,
	frank.li@....com
Cc: kernel@...gutronix.de,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH V2 05/10] arm: dts: imx7d: Add Root Port node and PERST property

Since describing the PCIe PERST# property under Host Bridge node is now
deprecated, it is recommended to add it to the Root Port node, so
creating the Root Port node and add the reset-gpios property in Root
Port.

Signed-off-by: Sherry Sun <sherry.sun@....com>
---
 arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts |  5 +++++
 arch/arm/boot/dts/nxp/imx/imx7d.dtsi    | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts b/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts
index a370e868cafe..0046b276b8b9 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts
@@ -456,10 +456,15 @@ display_out: endpoint {
 };
 
 &pcie {
+	/* This property is deprecated, use reset-gpios from the Root Port node. */
 	reset-gpio = <&extended_io 1 GPIO_ACTIVE_LOW>;
 	status = "okay";
 };
 
+&pcie_port0 {
+	reset-gpios = <&extended_io 1 GPIO_ACTIVE_LOW>;
+};
+
 &reg_1p0d {
 	vin-supply = <&sw2_reg>;
 };
diff --git a/arch/arm/boot/dts/nxp/imx/imx7d.dtsi b/arch/arm/boot/dts/nxp/imx/imx7d.dtsi
index d961c61a93af..3c5c1f2c1460 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7d.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7d.dtsi
@@ -155,6 +155,17 @@ pcie: pcie@...00000 {
 			reset-names = "pciephy", "apps", "turnoff";
 			fsl,imx7d-pcie-phy = <&pcie_phy>;
 			status = "disabled";
+
+			pcie_port0: pcie@0 {
+				compatible = "pciclass,0604";
+				device_type = "pci";
+				reg = <0x0 0x0 0x0 0x0 0x0>;
+				bus-range = <0x01 0xff>;
+
+				#address-cells = <3>;
+				#size-cells = <2>;
+				ranges;
+			};
 		};
 	};
 };
-- 
2.37.1