Subject: Re: [PATCH 5/5] arm64: dts: freescale: add DT overlay for MX95-15x15-FRDM RPMSG usage

From: Daniel Baluta <[email-masked]>
Date: Fri, 22 May 2026 15:11:26 +0300

On 5/22/26 14:18, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <[email-masked]>
> 
> Add RPMSG DT overlay for the MX95-15x15-FRDM board. This overlay is meant
> to be used with the mx95evkrpmsg system manager configuration for
> remoteproc and audio over rpmsg-usecases.
> 
> Signed-off-by: Laurentiu Mihalcea <[email-masked]>
> ---
>  arch/arm64/boot/dts/freescale/Makefile        |  3 +
>  .../dts/freescale/imx95-15x15-frdm-rpmsg.dtso | 65 +++++++++++++++++++
>  2 files changed, 68 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/freescale/imx95-15x15-frdm-rpmsg.dtso
> 
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index 513f61eb27b8..a30a99e42426 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -521,6 +521,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx943-evk-pcie0-ep.dtb imx943-evk-pcie1-ep.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-ab2.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-frdm.dtb
> +dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-frdm-rpmsg.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk-sof.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-toradex-smarc-dev.dtb
> @@ -539,6 +540,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-mallow.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-yavia.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-zinnia.dtb
>  
> +imx95-15x15-frdm-rpmsg-dtbs = imx95-15x15-frdm.dtb imx95-15x15-frdm-rpmsg.dtbo
> +
>  imx95-15x15-evk-pcie-dtbs += imx95-15x15-evk.dtb imx-m2-pcie.dtbo
>  dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-evk-pcie.dtb
>  
> diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-frdm-rpmsg.dtso b/arch/arm64/boot/dts/freescale/imx95-15x15-frdm-rpmsg.dtso
> new file mode 100644
> index 000000000000..b39444dde66e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx95-15x15-frdm-rpmsg.dtso
> @@ -0,0 +1,65 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright 2026 NXP
> + *
> + * This DT overlay is meant to be used alongside the mx95evkrpmsg SM
> + * configuration for remoteproc and audio over rpmsg.
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +&{/} {
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +
> +		vdev0vring0: memory@88000000 {
> +			reg = <0 0x88000000 0 0x8000>;
> +			no-map;
> +		};
> +
> +		vdev0vring1: memory@88008000 {
> +			reg = <0 0x88008000 0 0x8000>;
> +			no-map;
> +		};
> +
> +		vdev0buffer: memory@88020000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0 0x88020000 0 0x100000>;
> +			no-map;
> +		};
> +
> +		rsc_table: memory@88220000 {
> +			reg = <0 0x88220000 0 0x1000>;
> +			no-map;
> +		};
> +	};
> +
> +	sound-micfil {
> +		status = "disabled";
> +	};
> +};
> +
> +&cm7 {
> +	memory-region = <&vdev0buffer>, <&vdev0vring0>,
> +			<&vdev0vring1>, <&rsc_table>;
> +	memory-region-names = "vdev0buffer", "vdev0vring0",
> +			      "vdev0vring1", "rsc-table";
> +	status = "okay";
> +};
> +
> +&edma1 {
> +	/* reserved for M7 */
> +	dma-channel-mask = <0x40>;
> +};
> +
> +&edma2 {
> +	/* reserved for M7 and V2X */
> +	dma-channel-mask = <0xf>;
> +};
> +
> +&micfil {
> +	/* reserved for M7 */
> +	status = "disabled";
> +};

For this usecase usually status needs to be set to "reserved".

Otherwise, 

Reviewed-by: Daniel Baluta <[email-masked]>