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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 --- arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts index 7eb12e7d5014..e4649d7f9122 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 = <®_m2_pwr>; vpcie3v3aux-supply = <®_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>; -- 2.37.1