linux-kernel - Re: [PATCH 03/10] arm: dts: imx6qdl: Add Root Port node and move PERST property to Root Port node

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Message-ID: <aW5aodaPdjYwAE1V@lizhi-Precision-Tower-5810>
Date: Mon, 19 Jan 2026 11:24:01 -0500
From: Frank Li <Frank.li@....com>
To: Sherry Sun <sherry.sun@....com>
Cc: hongxing.zhu@....com, l.stach@...gutronix.de, bhelgaas@...gle.com,
	lpieralisi@...nel.org, kwilczynski@...nel.org, mani@...nel.org,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com,
	kernel@...gutronix.de, linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/10] arm: dts: imx6qdl: Add Root Port node and move
 PERST property to Root Port node

On Mon, Jan 19, 2026 at 06:02:28PM +0800, Sherry Sun wrote:
> 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 move the reset-gpios property.
>
> Signed-off-by: Sherry Sun <sherry.sun@....com>
> ---
>  arch/arm/boot/dts/nxp/imx/imx6qdl-sabresd.dtsi |  5 ++++-
>  arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi         | 11 +++++++++++
>  arch/arm/boot/dts/nxp/imx/imx6qp-sabreauto.dts |  5 ++++-
>  3 files changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-sabresd.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-sabresd.dtsi
> index ba29720e3f72..c64c8cbd0038 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6qdl-sabresd.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-sabresd.dtsi
> @@ -754,11 +754,14 @@ lvds0_out: endpoint {
>  &pcie {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_pcie>;
> -	reset-gpio = <&gpio7 12 GPIO_ACTIVE_LOW>;

Generally, don't remove old property to keep back comaptiblity. You can
add comments here if you want.

Frank

>  	vpcie-supply = <&reg_pcie>;
>  	status = "okay";
>  };
>
> +&pcie_port0 {
> +	reset-gpios = <&gpio7 12 GPIO_ACTIVE_LOW>;
> +};
> +
>  &pwm1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_pwm1>;
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi
> index 9793feee6394..c03deb2cdfab 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi
> @@ -287,6 +287,17 @@ pcie: pcie@...c000 {
>  				 <&clks IMX6QDL_CLK_PCIE_REF_125M>;
>  			clock-names = "pcie", "pcie_bus", "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;
> +			};
>  		};
>
>  		aips1: bus@...0000 { /* AIPS1 */
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6qp-sabreauto.dts b/arch/arm/boot/dts/nxp/imx/imx6qp-sabreauto.dts
> index c5b220aeaefd..c35c24623d36 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6qp-sabreauto.dts
> +++ b/arch/arm/boot/dts/nxp/imx/imx6qp-sabreauto.dts
> @@ -45,10 +45,13 @@ MX6QDL_PAD_GPIO_6__ENET_IRQ		0x000b1
>  };
>
>  &pcie {
> -	reset-gpio = <&max7310_c 5 GPIO_ACTIVE_LOW>;
>  	status = "okay";
>  };
>
> +&pcie_port0 {
> +	reset-gpios = <&max7310_c 5 GPIO_ACTIVE_LOW>;
> +};
> +
>  &sata {
>  	status = "okay";
>  };
> --
> 2.37.1
>