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

Rob Herring
2025-12-29T23:25:32Z

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.

Is this generic for any remoteproc device or just ST's remoteproc. Looks
like the latter to me.

> In addition, the "linaro,optee-tz" binding is updated to specify the
> '#address-cells' and '#size-cells' values used for child TEE service
> nodes.

I'm pretty sure I already rejected per service/app child nodes for
OP-TEE when its binding was submitted. If we do need something in DT
to define some resources, then can't we have some sort of
standard/common communications channel? I don't care to see some sort of
free-for-all where we have every vendor doing their own thing. OP-TEE
needs to standarize this.

Rob