Re: [PATCH v3 3/4] gpio: imx-rpmsg: add imx-rpmsg GPIO driver

[Mathieu Poirier <mathieu.poirier@linaro.org>]

On Fri, Oct 10, 2025 at 12:58:38AM +0200, Andrew Lunn wrote:
> On Thu, Oct 09, 2025 at 05:27:15PM -0500, Shenwei Wang wrote:
> > On i.MX SoCs, the system may include two processors:
> > 	- An MCU running an RTOS
> > 	- An MPU running Linux
> > 
> > These processors communicate via the RPMSG protocol.
> > The driver implements the standard GPIO interface, allowing
> > the Linux side to control GPIO controllers which reside in
> > the remote processor via RPMSG protocol.
> 
> I've not seen the discussion on earlier versions of this patchset, so
> i might be asking something already asked and answered. Sorry if i am.
> 
> Is there anything IMX specific in here? This appears to be the first
> RPMSG GPIO driver. Do we have the opportunity here to define a
> protocol for all future RPMSG GPIO drivers, which any/all vendors
> should follow, so we don't have lots of different implementations of
> basically they same thing? So this would become gpio-rpmsg.c and a
> Document somewhere describing the protocol?
>

I haven't looked at this patchset yet but I think Andrew's proposal has merit.
 
> 	Andrew