[PATCH v9 1/7] firmware: smccc: Add an Arm SMCCC bus

[Aneesh Kumar K.V]

Jason Gunthorpe <jgg at nvidia.com> writes:

> On Thu, Sep 03, 2026 at 02:22:51PM +0530, Aneesh Kumar K.V wrote:
>
>> I have updated the bus to match devices using func_id.
>
> Did you have any thoughts on how to handle ARM's versioning scheme
> too?
>
> I'm not sure what the rules are but it seems like if the major changes
> then the API is incompatible? So shouldn't every driver advertise a
> supported major, and the major be in the modalias and checked by match
> too?

I expect a single driver to handle the RSI features and determine the
version range it supports. I don't think we want multiple drivers, each
handling a different major version of the RMM release. Given that,
wouldn't it be sufficient for the driver's probe routine to check the
supported version range and return -ENODEV if it is unsupported?

-aneesh