Re: [PATCH v2 1/5] dt-bindings: remoteproc: sse710: Add the External Systems remote processors

Krzysztof Kozlowski
2024-09-20T12:43:38Z

On 19/09/2024 16:57, Abdellatif El Khlifi wrote:
> Hi Krzysztof,
>
>>>>> + '#extsys-id':
>>>>
>>>> '#' is not correct for sure, that's not a cell specifier.
>>>>
>>>> But anyway, we do not accept in general instance IDs.
>>>
>>> I'm happy to replace the instance ID with another solution.
>>> In our case the remoteproc instance does not have a base address
>>> to use. So, we can't put remoteproc@address
>>>
>>> What do you recommend in this case please ?
>>
>> Waiting one month to respond is a great way to drop all context from my
>> memory. The emails are not even available for me - gone from inbox.
>>
>> Bus addressing could note it. Or you have different devices, so
>> different compatibles. Tricky to say, because you did not describe the
>> hardware really and it's one month later...
>>
>
> Sorry for waiting. I was in holidays.
>
> I'll add more documentation about the external system for more clarity [1].
>
> Basically, Linux runs on the Cortex-A35. The External system is a
> Cortex-M core. The Cortex-A35 can not access the memory of the Cortex-M.
> It can only control Cortex-M core using the reset control and status registers mapped
> in the memory space of the Cortex-A35.

That's pretty standard.

It does not explain me why bus addressing or different compatible are
not sufficient here.

Best regards,
Krzysztof