arm64: dts: imx: Add common imx-m2-pcie.dtso to enable PCIe on M.2 connector

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@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 48fbf9c33b65fb321a30fd3306ca9157b7338160..0a4dabac5de4c424de3efbbce97305305ee07a0f 100644 (file)
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -360,12 +360,14 @@ 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
@@ -535,7 +537,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-mallow.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-zinnia.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 (file)
index 0000000..1930de0
--- /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";
+};