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

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Message-ID: <e124b444-0427-448d-af74-aec22468893a@lunn.ch>
Date: Mon, 13 Oct 2025 21:14:23 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Shenwei Wang <shenwei.wang@....com>
Cc: 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>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Peng Fan <peng.fan@....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>,
	dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH v3 3/4] gpio: imx-rpmsg: add imx-rpmsg GPIO driver

> For instance, if we define the error code as 1 in the return
> message, the driver will interpret it and just return -EOPNOTSUPP,
> regardless of the architecture.

Yes, that is fine. Document the values the return code can take, and
what the mean. What we don't want is the protocol directly returning
errno values, because they are architecture specific.

     Andrew