[PATCH v4 1/4] dt-bindings: remoteproc: add imx-rproc-psci

[Krzysztof Kozlowski]

On Wed, Aug 12, 2026 at 06:46:30PM +0800, Jiafei Pan wrote:
> Add compatible string "fsl,imx-rproc-psci" for i.MX Cortex-A Core's
> remoteproc support.
> 
> Signed-off-by: Jiafei Pan <Jiafei.Pan at nxp.com>
> 
> ---
> Changes in v4:
> - Updated description to describe the hardware instead of the binding
> - Changed compatible to SoC-specific "fsl,imx93-rproc-psci" with
>   generic fallback "fsl,imx-rproc-psci"
> - Fixed example node name from "remoteproc-ca55-1" to "remoteproc"

You need to start using b4 to send patches or send them correctly... Why
is this response to some other thread?

> 
> ---
>  .../remoteproc/fsl,imx-rproc-psci.yaml        | 54 +++++++++++++++++++
>  1 file changed, 54 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
> new file mode 100644
> index 000000000000..7d0d0da383a2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
> @@ -0,0 +1,54 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/fsl,imx-rproc-psci.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX Cortex-A Core Remote Processor via PSCI
> +
> +maintainers:
> +  - Jiafei Pan <Jiafei.Pan at nxp.com>
> +
> +description:
> +  NXP i.MX SoCs integrate multiple Cortex-A cores. On certain i.MX
> +  platforms, one or more of these cores can be offloaded to run RTOS
> +  or bare-metal firmware as a remote processor, while the remaining
> +  cores run Linux. The cores are powered on and off via PSCI (Power
> +  State Coordination Interface) CPU_ON/CPU_OFF calls to the firmware.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - fsl,imx93-ca55-rproc
> +      - const: fsl,imx-rproc-psci

Hm? So you just ignored the feedback?

> +
> +  fsl,cpus-mask:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      Bitmask indicating which CPU cores are assigned to this remote
> +      processor instance. Each bit represents a CPU core, where bit N
> +      corresponds to CPU N. For example, 0x2 (0b10) assigns CPU core 1,
> +      while 0x6 (0b110) assigns CPU cores 1 and 2.

How did you implement feedback from Sashiko?

> +
> +  memory-region:
> +    maxItems: 1
> +    description:
> +      Phandle to a reserved memory region to be used for the remote
> +      processor's code and data.
> +
> +required:
> +  - compatible
> +  - fsl,cpus-mask
> +  - memory-region
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +        remoteproc {

Odd indentation.

> +            compatible = "fsl,imx93-ca55-rproc", "fsl,imx-rproc-psci";
> +            /* bitmask: 0b10, assign A55 Core 1 */
> +            fsl,cpus-mask = <0x2>;
> +            memory-region = <&rtos_ca55_reserved>;
> +        };
> -- 
> 2.43.0
>