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

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

On Tue, Mar 17, 2026 at 11:10:24AM +0800, Sherry Sun wrote:

quoted

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 <redacted>
---

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

Hi Frank,

The out-of-box M.2 WiFi module on imx95-15x15-evk board is SDIO IW612.
imx95-19x19-evk board use PCIe WiFi as the out-of-box M.2 WiFi module.

Best Regards
Sherry

Frank

quoted

 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

quoted

 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