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

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Message-ID: <7db35257-de36-4eb5-9205-ca7fb8343401@lunn.ch>
Date: Fri, 7 Nov 2025 18:27:32 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Arnaud POULIQUEN <arnaud.pouliquen@...s.st.com>
Cc: Shenwei Wang <shenwei.wang@....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>,
	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>,
	"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

> For your information, I'm facing a similar issue with my remoteproc_tee
> series [1]. The advice I received was to look at the PCIe DT implementation
> (I haven't had time to explore it yet). This advice also seems relevant to
> your series.
> 
> Do you also have a look to rpmsg_virtio_bus ? it seems a good candidate to
> match the device tree properties with the rpmsg device?
> 
> In the end, this is my point of view. Perhaps it is better to wait for
> others before deciding on the direction...

There might also be some ideas which can be take from greybus. It also
implements remote devices over a communication medium. 

	Andrew