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

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Message-ID: <aVIUEafDoVQv0rHf@sumit-xelite>
Date: Mon, 29 Dec 2025 11:09:29 +0530
From: Sumit Garg <sumit.garg@...nel.org>
To: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Jens Wiklander <jens.wiklander@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
	op-tee@...ts.trustedfirmware.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v20 1/6] dt-bindings: firmware: Add TEE remoteproc
 service binding

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@...s.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@...s.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
>