Re: [PATCH] arm64: dts: imx95-15x15-evk: Disable PCIe bus in the default dts
From: Frank Li <Frank.li@nxp.com>
Date: 2026-03-18 22:40:51
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On Tue, Mar 17, 2026 at 11:10:24AM +0800, Sherry Sun wrote:
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. Frank
quoted hunk ↗ jump to hunk
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.dtsodiff --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-$(CONFIG_ARCH_MXC) += imx95-19x19-evk-sof.dtb dtb-$(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.dtbodiff --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 = <®_m2_pwr>; vpcie3v3aux-supply = <®_m2_pwr>; supports-clkreq; - status = "okay"; + status = "disabled"; }; &pcie0_ep { --2.37.1