[PATCH] arm64: dts: imx8mp-evk: Disable PCIe bus in the default dts

[Sherry Sun]

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 imx8mp-evk.dts, and add a separate
imx8mp-evk-pcie.dtso to enable PCIe bus.

Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx>
---
 arch/arm64/boot/dts/freescale/Makefile        |  4 +++-
 .../boot/dts/freescale/imx8mp-evk-pcie.dtso   | 19 +++++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mp-evk.dts  |  4 ++--
 3 files changed, 24 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-evk-pcie.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index c42ca3f77b07..c4e790a268ae 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 imx8mp-evk-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
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk-pcie.dtso b/arch/arm64/boot/dts/freescale/imx8mp-evk-pcie.dtso
new file mode 100644
index 000000000000..4f6546d442bf
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk-pcie.dtso
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2026 NXP
+ */
+
+/dts-v1/;
+/plugin/;
+
+&pcie_phy {
+	status = "okay";
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&usdhc1 {
+	status = "disabled";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
index aedc09937716..f09335e6388d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
@@ -763,7 +763,7 @@ &pcie_phy {
 	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
 	clocks = <&pcie0_refclk>;
 	clock-names = "ref";
-	status = "okay";
+	status = "disabled";
 };
 
 &pcie0 {
@@ -773,7 +773,7 @@ &pcie0 {
 	vpcie-supply = <&reg_pcie0>;
 	vpcie3v3aux-supply = <&reg_pcie0>;
 	supports-clkreq;
-	status = "okay";
+	status = "disabled";
 };
 
 &pcie0_ep {
-- 
2.37.1