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

Sherry Sun posted 1 patch 2 weeks, 6 days ago
There is a newer version of this series
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
[PATCH] arm64: dts: imx95-15x15-evk: Disable PCIe bus in the default dts
Posted by Sherry Sun 2 weeks, 6 days ago 
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 <sherry.sun@nxp.com>
---
 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-$(CONFIG_ARCH_MXC) += imx95-19x19-evk-sof.dtb
 dtb-$(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
Re: [PATCH] arm64: dts: imx95-15x15-evk: Disable PCIe bus in the default dts
Posted by Frank Li 2 weeks, 5 days ago 
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 <sherry.sun@nxp.com>
> ---

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

Frank

>  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-$(CONFIG_ARCH_MXC) += imx95-19x19-evk-sof.dtb
>  dtb-$(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
>
Re: [PATCH] arm64: dts: imx95-15x15-evk: Disable PCIe bus in the default dts
Posted by Daniel Baluta 2 weeks, 5 days ago 
On 3/17/26 05:10, Sherry Sun wrote:
> // 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";
>  };

Since this node it is not used here would it make more sense to move it directly into the overlay file?

Patchew 2.1-devel-ea86937

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