Re: [PATCH v20 1/6] dt-bindings: firmware: Add TEE remoteproc service binding

Sumit Garg
2025-12-29T05:39:38Z

On Wed, Dec 17, 2025 at 04:39:12PM +0100, Arnaud Pouliquen wrote:
> Add a device tree binding for the TEE-based remote processor control
> service implemented as an OP-TEE Trusted Application identified by
> UUID 80a4c275-0a47-4905-8285-1486a9771a08.
>
> The TEE service node is a child of the "linaro,optee-tz" firmware node and
> acts as a container for remoteproc devices that are controlled via TEE.
>
> In addition, the "linaro,optee-tz" binding is updated to specify the
> '#address-cells' and '#size-cells' values used for child TEE service
> nodes.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
> .../arm/firmware/linaro,optee-tz.yaml | 6 +++
> .../bindings/remoteproc/remoteproc-tee.yaml | 47 +++++++++++++++++++
> 2 files changed, 53 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml
>
> diff --git a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
> index 5d033570b57b..ab69eecba9ad 100644
> --- a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
> +++ b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
> @@ -41,6 +41,12 @@ properties:
> HVC #0, register assignments
> register assignments are specified in drivers/tee/optee/optee_smc.h
>
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 0
> +
> required:
> - compatible
> - method
> diff --git a/Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml b/Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml
> new file mode 100644
> index 000000000000..083ecf1f38cf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml
> @@ -0,0 +1,47 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/remoteproc-tee.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TEE Remote Processor Control Service (UUID 80a4c275-0a47-4905-8285-1486a9771a08)
> +
> +maintainers:
> + - Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> +
> +description: |
> + Node describing a TEE-based remote processor control service implemented as
> + a Trusted Application identified by UUID 80a4c275-0a47-4905-8285-1486a9771a08.
> +
> + It is a child of the OP-TEE firmware node ("linaro,optee-tz") and acts as a
> + container for child remoteproc devices (for example, the STM32MP15 M4 core
> + described by "st,stm32mp1-tee").
> +
> +properties:
> + compatible:
> + const: rproc-service-80a4c275-0a47-4905-8285-1486a9771a08

This should just be "80a4c275-0a47-4905-8285-1486a9771a08" which is the
device/service identity on TEE bus.

-Sumit

> +
> + reg:
> + description: |
> + Logical identifier of the TEE remoteproc service instance.
> + maxItems: 1
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 0
> +
> +patternProperties:
> + "^[a-zA-Z0-9,._-]+@[0-9a-fA-F]+$":
> + type: object
> +
> +
> +required:
> + - compatible
> + - reg
> + - "#address-cells"
> + - "#size-cells"
> +
> +additionalProperties: false
> +...
> --
> 2.43.0
>