[PATCH v1] arm64: dts: imx94: Add Root Port node and PERST property

[Sherry Sun]

> Subject: [PATCH v1] arm64: dts: imx94: Add Root Port node and PERST
> property
> 
> From: Richard Zhu <hongxing.zhu at oss.nxp.com>
> 
> 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: Richard Zhu <hongxing.zhu at nxp.com>
> ---
>  arch/arm64/boot/dts/freescale/imx94.dtsi     | 11 +++++++++++
>  arch/arm64/boot/dts/freescale/imx943-evk.dts | 10 ++++++++++
>  arch/arm64/boot/dts/freescale/imx943.dtsi    | 11 +++++++++++
>  3 files changed, 32 insertions(+)
> ---
> Since the patch-set [1] issued by Sherry had been landed. Add according
> changes on i.MX943 board too.
> [1] https://lkml.org/lkml/2026/6/1/1461
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx94.dtsi
> b/arch/arm64/boot/dts/freescale/imx94.dtsi
> index 1f9035e6cf159..dfbb73603cb24 100644
> --- a/arch/arm64/boot/dts/freescale/imx94.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx94.dtsi
> @@ -1411,6 +1411,17 @@ pcie0: pcie at 4c300000 {
>  			power-domains = <&scmi_devpd
> IMX94_PD_HSIO_TOP>;
>  			fsl,max-link-speed = <3>;
>  			status = "disabled";
> +
> +			pcie0_port0: pcie at 0 {
> +				compatible = "pciclass,0604";
> +				device_type = "pci";
> +				reg = <0x0 0x0 0x0 0x0 0x0>;
> +				bus-range = <0x01 0xff>;
> +
> +				#address-cells = <3>;
> +				#size-cells = <2>;
> +				ranges;
> +			};
>  		};
> 
>  		pcie0_ep: pcie-ep at 4c300000 {
> diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts
> b/arch/arm64/boot/dts/freescale/imx943-evk.dts
> index 7cfd424689507..ed3abd3e76e56 100644
> --- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
> @@ -1034,12 +1034,17 @@ &pcie0 {
>  		 <&pcie_ref_clk>;
>  	clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux",
>  		      "ref", "extref";
> +	/* This property is deprecated, use reset-gpios from the Root Port
> +node. */
>  	reset-gpio = <&pcal6416_i2c3_u46 3 GPIO_ACTIVE_LOW>;

Hi Richard,
This reset-gpio property should be deleted, for new i.MX, we can use the
reset-gpios under Root Port directly.

>  	vpcie3v3aux-supply = <&reg_m2_wlan>;
>  	supports-clkreq;
>  	status = "okay";
>  };
> 
> +&pcie0_port0 {
> +	reset-gpio = <&pcal6416_i2c3_u46 3 GPIO_ACTIVE_LOW>; };
> +
>  &pcie0_ep {
>  	pinctrl-0 = <&pinctrl_pcie0>;
>  	pinctrl-names = "default";
> @@ -1058,12 +1063,17 @@ &pcie1 {
>  		 <&pcie_ref_clk>;
>  	clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux",
>  		      "ref", "extref";
> +	/* This property is deprecated, use reset-gpios from the Root Port
> +node. */
>  	reset-gpio = <&pcal6416_i2c3_u46 1 GPIO_ACTIVE_LOW>;

Same here.

Best Regards
Sherry

>  	vpcie3v3aux-supply = <&reg_slot_pwr>;
>  	supports-clkreq;
>  	status = "okay";
>  };
> 
> +&pcie1_port0 {
> +	reset-gpio = <&pcal6416_i2c3_u46 1 GPIO_ACTIVE_LOW>; };
> +
>  &pcie1_ep {
>  	pinctrl-0 = <&pinctrl_pcie1>;
>  	pinctrl-names = "default";
> diff --git a/arch/arm64/boot/dts/freescale/imx943.dtsi
> b/arch/arm64/boot/dts/freescale/imx943.dtsi
> index cf5b3dbb47ff7..01152fd0efa5e 100644
> --- a/arch/arm64/boot/dts/freescale/imx943.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx943.dtsi
> @@ -255,6 +255,17 @@ pcie1: pcie at 4c380000 {
>  			power-domains = <&scmi_devpd
> IMX94_PD_HSIO_TOP>;
>  			fsl,max-link-speed = <3>;
>  			status = "disabled";
> +
> +			pcie1_port0: pcie at 0 {
> +				compatible = "pciclass,0604";
> +				device_type = "pci";
> +				reg = <0x0 0x0 0x0 0x0 0x0>;
> +				bus-range = <0x01 0xff>;
> +
> +				#address-cells = <3>;
> +				#size-cells = <2>;
> +				ranges;
> +			};
>  		};
> 
>  		pcie1_ep: pcie-ep at 4c380000 {
> --
> 2.34.1