Re: [PATCH v13 3/4] gpio: rpmsg: add generic rpmsg GPIO driver

[Arnaud POULIQUEN <arnaud.pouliquen@foss.st.com>]

Hello Mathieu,

[...]
>>
>> A third option would be a combination of both approaches: instantiate the
>> device using the same name service from the remote side, as done in
>> rpmsg-tty. In that case, a get_config message, or a similar mechanism, would
>> also be needed to retrieve the port information from the remote side.
>>
> 
> I'm not overly fond of a get_config message because it is one more thing we
> have to define and maintain.
> 
> Arnaud: is there a get_config message already defined for rpmsg_tty?

No there isn't.

Regards,
Arnaud

> 
> Beleswar: Can you provide a link to a virtio device that would use a get_config
> message?
>   
>> Tanmaya also proposed another alternative based on reserved addresses.
>>
>> At this point, I suggest letting Mathieu review the discussion and recommend
>> the most suitable approach.
>>
>> Thanks,
>> Arnaud
>>
>>>>
>>>> At the end, whatever solution is implemented, my main concern is that the
>>>> Linux driver design should, if possible, avoid adding unnecessary complexity
>>>> or limitations on the remote side (for instance in openAMP project).
>>>
>>>
>>> Yes definitely, I want the same. Feel free to let me know if this does
>>> not suit with the OpenAMP project.
>>>
>>> Thanks,
>>> Beleswar
>>>
>>>>
>>>> Thanks,
>>>> Arnaud
>>>>
>>>>
>>>>> So Linux does not need to send the port idx everytime while sending a
>>>>> gpio message anymore.
>>>>>
>>>>> Thanks,
>>>>> Beleswar
>>>>>
>>>>> [...]
>>>>>
>>>>
>>