linux-kernel - [PATCH V2 04/10] arm: dts: imx6sx: Add Root Port node and PERST property

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Message-Id: <20260123021445.3782170-5-sherry.sun@nxp.com>
Date: Fri, 23 Jan 2026 10:14:39 +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 04/10] arm: dts: imx6sx: 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/imx6sx-sdb.dtsi |  5 +++++
 arch/arm/boot/dts/nxp/imx/imx6sx.dtsi     | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx6sx-sdb.dtsi b/arch/arm/boot/dts/nxp/imx/imx6sx-sdb.dtsi
index 3e238d8118fa..338de4d144b2 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6sx-sdb.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6sx-sdb.dtsi
@@ -282,11 +282,16 @@ codec: wm8962@1a {
 &pcie {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pcie>;
+	/* This property is deprecated, use reset-gpios from the Root Port node. */
 	reset-gpio = <&gpio2 0 GPIO_ACTIVE_LOW>;
 	vpcie-supply = <&reg_pcie_gpio>;
 	status = "okay";
 };
 
+&pcie_port0 {
+	reset-gpios = <&gpio2 0 GPIO_ACTIVE_LOW>;
+};
+
 &lcdif1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_lcd>;
diff --git a/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi b/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
index 1426f357d474..d42363cb5105 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
@@ -1470,6 +1470,17 @@ pcie: pcie@...c000 {
 			power-domains = <&pd_disp>, <&pd_pci>;
 			power-domain-names = "pcie", "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