Re: [PATCH v5 0/5] Enable Remote GPIO over RPMSG on i.MX Platform

Shenwei Wang
2025-11-05T14:12:46Z

Hi Arnaud,

> -----Original Message-----
> From: Arnaud POULIQUEN <arnaud.pouliquen@foss.st.com>
> Sent: Wednesday, November 5, 2025 4:26 AM
> To: Peng Fan <peng.fan@nxp.com>; Shenwei Wang <shenwei.wang@nxp.com>;
> Bjorn Andersson <andersson@kernel.org>; Mathieu Poirier
> <mathieu.poirier@linaro.org>; Rob Herring <robh@kernel.org>; Krzysztof
> Kozlowski <krzk+dt@kernel.org>; Conor Dooley <conor+dt@kernel.org>; Shawn
> Guo <shawnguo@kernel.org>; Sascha Hauer <s.hauer@pengutronix.de>;
> Jonathan Corbet <corbet@lwn.net>; Linus Walleij <linus.walleij@linaro.org>;
> Bartosz Golaszewski <brgl@bgdev.pl>
> Cc: Pengutronix Kernel Team <kernel@pengutronix.de>; Fabio Estevam
> <festevam@gmail.com>; linux-remoteproc@vger.kernel.org;
> devicetree@vger.kernel.org; imx@lists.linux.dev; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org; linux-
> doc@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>; Randy Dunlap
> <rdunlap@infradead.org>; Andrew Lunn <andrew@lunn.ch>; linux-
> gpio@vger.kernel.org
> Subject: [EXT] Re: [PATCH v5 0/5] Enable Remote GPIO over RPMSG on i.MX
> Platform
> Hi,
>
> On 11/5/25 02:12, Peng Fan wrote:
> > Hi Shenwei
> >
> >> Subject: [PATCH v5 0/5] Enable Remote GPIO over RPMSG on i.MX
> >> Platform
> >>
> >> Support the remote devices on the remote processor via the RPMSG bus
> >> on i.MX platform.
> >>
> >
> > I have not look into the details of new version, but before that, just
> > want to check, have we agreed on what Arnaud suggested?
> > or continue to proceed to be this as i.MX specific?
>
> Thanks, Peng, for pointing this out. Regarding the V3 discussions, it seems that I
> am not the only one suggesting a generic driver.
>

As I mentioned before, the only i.MX-specific part is the transport protocol over the RPMSG bus.
In this v5 patches, we’ve included detailed documentation for the protocol in a separate file. Any
platform that follows the same protocol should work right out of the box.

If you spot anything that could be improved, please let me know!

Thanks,
Shenwei

> Thanks,
> Arnaud
>
> >
> > Thanks
> > Peng.