Re: [PATCH] arm64: dts: imx95-15x15-evk: Disable PCIe bus in the default dts

[Frank Li <Frank.li@nxp.com>]

On Tue, Mar 17, 2026 at 11:10:24AM +0800, Sherry Sun wrote:
> Disable PCIe bus in the default dts to avoid the shared regulatory
> between SDIO and PCIe buses, the random probe order between the two
> buses may break the PCIe initialization sequence which cause PCIe
> devices has probability of failing to detect.
>
> Enable the SDIO WiFi in the default imx95-15x15-evk.dts, and add a
> separate imx95-15x15-evk-pcie.dtso to enable PCIe bus.
>
> Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
> ---

Why SDIO WIFI is default one? Generally, PCIe have better preformance.

Frank

>  arch/arm64/boot/dts/freescale/Makefile            |  5 ++++-
>  .../boot/dts/freescale/imx95-15x15-evk-pcie.dtso  | 15 +++++++++++++++
>  arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts |  2 +-
>  3 files changed, 20 insertions(+), 2 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/freescale/imx95-15x15-evk-pcie.dtso
>
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index c4e790a268ae..505efc9ebd58 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -471,7 +471,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk-sof.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-toradex-smarc-dev.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-tqma9596sa-mb-smarc-2.dtb
>
> -imx95-15x15-evk-pcie0-ep-dtbs = imx95-15x15-evk.dtb imx-pcie0-ep.dtbo
> +imx95-15x15-evk-pcie-dtbs = imx95-15x15-evk.dtb imx95-15x15-evk-pcie.dtbo
> +dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-evk-pcie.dtb
> +
> +imx95-15x15-evk-pcie0-ep-dtbs = imx95-15x15-evk-pcie.dtb imx-pcie0-ep.dtbo
>  dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-evk-pcie0-ep.dtb
>  imx95-19x19-evk-pcie0-ep-dtbs += imx95-19x19-evk.dtb imx-pcie0-ep.dtbo
>  imx95-19x19-evk-pcie1-ep-dtbs += imx95-19x19-evk.dtb imx-pcie1-ep.dtbo
> diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk-pcie.dtso b/arch/arm64/boot/dts/freescale/imx95-15x15-evk-pcie.dtso
> new file mode 100644
> index 000000000000..42384e6233f3
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk-pcie.dtso
> @@ -0,0 +1,15 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright 2026 NXP
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +&pcie0 {
> +	status = "okay";
> +};
> +
> +&usdhc3 {
> +	status = "disabled";
> +};
> diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
> index 7eb12e7d5014..afd89ce3cc5b 100644
> --- a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
> @@ -557,7 +557,7 @@ &pcie0 {
>  	vpcie-supply = <&reg_m2_pwr>;
>  	vpcie3v3aux-supply = <&reg_m2_pwr>;
>  	supports-clkreq;
> -	status = "okay";
> +	status = "disabled";
>  };
>
>  &pcie0_ep {
> --
> 2.37.1
>