[PATCH V3 3/3] arm64: dts: imx: Add common imx-m2-pcie.dtso to enable PCIe on M.2 connector

[Sherry Sun]

> Subject: Re: [PATCH V3 3/3] arm64: dts: imx: Add common imx-m2-pcie.dtso
> to enable PCIe on M.2 connector
> 
> On Wed, Mar 25, 2026 at 04:32:01PM +0800, Sherry Sun wrote:
> > Some i.MX boards (i.MX8MP EVK and i.MX95-15x15 EVK) have M.2
> > connectors that are physically wired to both USDHC and PCIe
> > controllers. The default device tree enables USDHC for SDIO WiFi
> > modules and disables PCIe to avoid regulator conflicts.
> >
> > Add a common imx-m2-pcie.dtso that can be applied to enable PCIe and
> > disable USDHC when a PCIe module is installed in the M.2 connector.
> >
> > This creates the following DTB files:
> > - imx8mp-evk-pcie.dtb: i.MX8MP EVK with PCIe enabled
> > - imx95-15x15-evk-pcie.dtb: i.MX95-15x15 EVK with PCIe enabled
> >
> > Signed-off-by: Sherry Sun <sherry.sun at nxp.com>
> > ---
> 
> Please rebase it to imx/dt64, and prefer use b4 or provide base-commit
> information. ref https://people.kernel.org/monsieuricon/all-patches-must-
> include-base-commit-info

Will do in next version, thanks!

Best Regards
Sherry

> 
> Frank
> 
> >  arch/arm64/boot/dts/freescale/Makefile         |  9 +++++++--
> >  arch/arm64/boot/dts/freescale/imx-m2-pcie.dtso | 15 +++++++++++++++
> >  2 files changed, 22 insertions(+), 2 deletions(-)  create mode 100644
> > arch/arm64/boot/dts/freescale/imx-m2-pcie.dtso
> >
> > diff --git a/arch/arm64/boot/dts/freescale/Makefile
> > b/arch/arm64/boot/dts/freescale/Makefile
> > index 155213c45319..1f542324b4fc 100644
> > --- a/arch/arm64/boot/dts/freescale/Makefile
> > +++ b/arch/arm64/boot/dts/freescale/Makefile
> > @@ -333,12 +333,14 @@ imx8mp-evk-lvds0-imx-lvds-hdmi-dtbs +=
> > imx8mp-evk.dtb imx8mp-evk-lvds0-imx-lvds-
> > imx8mp-evk-lvds1-imx-dlvds-hdmi-channel0-dtbs += imx8mp-evk.dtb
> > imx8mp-evk-lvds1-imx-dlvds-hdmi-channel0.dtbo
> >  imx8mp-evk-lvds1-imx-lvds-hdmi-dtbs += imx8mp-evk.dtb
> > imx8mp-evk-lvds1-imx-lvds-hdmi.dtbo
> >  imx8mp-evk-mx8-dlvds-lcd1-dtbs += imx8mp-evk.dtb
> > imx8mp-evk-mx8-dlvds-lcd1.dtbo -imx8mp-evk-pcie-ep-dtbs +=
> > imx8mp-evk.dtb imx-pcie0-ep.dtbo
> > +imx8mp-evk-pcie-dtbs += imx8mp-evk.dtb imx-m2-pcie.dtbo
> > +imx8mp-evk-pcie-ep-dtbs += imx8mp-evk-pcie.dtb imx-pcie0-ep.dtbo
> >  dtb-$(CONFIG_ARCH_MXC) +=
> > imx8mp-evk-lvds0-imx-dlvds-hdmi-channel0.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk-lvds0-imx-lvds-hdmi.dtb
> >  dtb-$(CONFIG_ARCH_MXC) +=
> > imx8mp-evk-lvds1-imx-dlvds-hdmi-channel0.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk-lvds1-imx-lvds-hdmi.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk-mx8-dlvds-lcd1.dtb
> > +dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk-pcie.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk-pcie-ep.dtb
> >
> >  imx8mp-tqma8mpql-mba8mpxl-lvds-tm070jvhg33-dtbs +=
> > imx8mp-tqma8mpql-mba8mpxl.dtb
> > imx8mp-tqma8mpql-mba8mpxl-lvds-tm070jvhg33.dtbo
> > @@ -481,7 +483,10 @@ dtb-$(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 imx-m2-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/imx-m2-pcie.dtso
> > b/arch/arm64/boot/dts/freescale/imx-m2-pcie.dtso
> > new file mode 100644
> > index 000000000000..1930de058a08
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/freescale/imx-m2-pcie.dtso
> > @@ -0,0 +1,15 @@
> > +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> > +/*
> > + * Copyright 2026 NXP
> > + */
> > +
> > +/dts-v1/;
> > +/plugin/;
> > +
> > +&pcie0 {
> > +	status = "okay";
> > +};
> > +
> > +&m2_usdhc {
> > +	status = "disabled";
> > +};
> > --
> > 2.37.1
> >