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

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Message-ID:
 <PAXPR04MB91858EA1057672295ECF793889C5A@PAXPR04MB9185.eurprd04.prod.outlook.com>
Date: Wed, 5 Nov 2025 14:12:42 +0000
From: Shenwei Wang <shenwei.wang@....com>
To: Arnaud POULIQUEN <arnaud.pouliquen@...s.st.com>, Peng Fan
	<peng.fan@....com>, Bjorn Andersson <andersson@...nel.org>, Mathieu Poirier
	<mathieu.poirier@...aro.org>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Shawn Guo
	<shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Jonathan Corbet
	<corbet@....net>, Linus Walleij <linus.walleij@...aro.org>, Bartosz
 Golaszewski <brgl@...ev.pl>
CC: Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam
	<festevam@...il.com>, "linux-remoteproc@...r.kernel.org"
	<linux-remoteproc@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-doc@...r.kernel.org"
	<linux-doc@...r.kernel.org>, dl-linux-imx <linux-imx@....com>, Randy Dunlap
	<rdunlap@...radead.org>, Andrew Lunn <andrew@...n.ch>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v5 0/5] Enable Remote GPIO over RPMSG on i.MX Platform

Hi Arnaud,

> -----Original Message-----
> From: Arnaud POULIQUEN <arnaud.pouliquen@...s.st.com>
> Sent: Wednesday, November 5, 2025 4:26 AM
> To: Peng Fan <peng.fan@....com>; Shenwei Wang <shenwei.wang@....com>;
> Bjorn Andersson <andersson@...nel.org>; Mathieu Poirier
> <mathieu.poirier@...aro.org>; Rob Herring <robh@...nel.org>; Krzysztof
> Kozlowski <krzk+dt@...nel.org>; Conor Dooley <conor+dt@...nel.org>; Shawn
> Guo <shawnguo@...nel.org>; Sascha Hauer <s.hauer@...gutronix.de>;
> Jonathan Corbet <corbet@....net>; Linus Walleij <linus.walleij@...aro.org>;
> Bartosz Golaszewski <brgl@...ev.pl>
> Cc: Pengutronix Kernel Team <kernel@...gutronix.de>; Fabio Estevam
> <festevam@...il.com>; linux-remoteproc@...r.kernel.org;
> devicetree@...r.kernel.org; imx@...ts.linux.dev; linux-arm-
> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; linux-
> doc@...r.kernel.org; dl-linux-imx <linux-imx@....com>; Randy Dunlap
> <rdunlap@...radead.org>; Andrew Lunn <andrew@...n.ch>; linux-
> gpio@...r.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.