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arm64: dts: imx95-15x15-evk: Disable PCIe bus in the default dts

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Disable the PCIe bus in the default device tree to avoid shared
regulator conflicts between SDIO and PCIe buses. The non-deterministic
probe order between these two buses can break the PCIe initialization
sequence, causing PCIe devices to fail detection intermittently.

On i.MX95-15x15 EVK board, the M.2 connector is physically wired to both
USDHC3 and PCIe0, however the out-of-box module is SDIO IW612 WiFi, so
enable SDIO WiFi in the default imx95-15x15-evk.dts.

Add 'm2_usdhc' label to USDHC3 to support device tree overlay for PCIe
modules. Users who need PCIe can use imx95-15x15-evk-pcie.dtb (added in
a follow-up patch) which applies an overlay to enable PCIe and disable
USDHC3.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Sherry Sun 2026-05-07 14:53:29 +08:00 committed by Frank Li
parent 0549cdb08a
commit bb97f6f67c
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
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@ -557,7 +557,7 @@ &pcie0 {
vpcie-supply = <&reg_m2_pwr>;
vpcie3v3aux-supply = <&reg_m2_pwr>;
supports-clkreq;
status = "okay";
status = "disabled";
};
&pcie0_ep {
@ -1137,7 +1137,7 @@ &usdhc2 {
status = "okay";
};
&usdhc3 {
m2_usdhc: &usdhc3 {
bus-width = <4>;
keep-power-in-suspend;
mmc-pwrseq = <&usdhc3_pwrseq>;