From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Shenwei Wang <shenwei.wang@nxp.com>,
Bjorn Andersson <andersson@kernel.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>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <brgl@bgdev.pl>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>, Peng Fan <peng.fan@nxp.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-imx@nxp.com
Subject: Re: [PATCH v3 3/4] gpio: imx-rpmsg: add imx-rpmsg GPIO driver
Date: Fri, 10 Oct 2025 10:31:07 -0600 [thread overview]
Message-ID: <aOk0y8xTi9hoGvyX@p14s> (raw)
In-Reply-To: <eb99d9a8-eb96-445d-899a-6e1d9b6f6c69@lunn.ch>
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
next prev parent reply other threads:[~2025-10-10 16:31 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-09 22:27 [PATCH v3 0/4] Enable Remote GPIO over RPMSG on i.MX Platform Shenwei Wang
2025-10-09 22:27 ` [PATCH v3 1/4] dt-bindings: remoteproc: imx_rproc: Add "rpmsg" subnode support Shenwei Wang
2025-10-20 10:08 ` (subset) " Krzysztof Kozlowski
2025-10-22 7:58 ` Arnaud POULIQUEN
2025-10-22 8:05 ` Krzysztof Kozlowski
2025-10-09 22:27 ` [PATCH v3 2/4] remoteproc: imx_rproc: Populate devices under "rpmsg" subnode Shenwei Wang
2025-10-09 22:27 ` [PATCH v3 3/4] gpio: imx-rpmsg: add imx-rpmsg GPIO driver Shenwei Wang
2025-10-09 22:58 ` Andrew Lunn
2025-10-10 16:31 ` Mathieu Poirier [this message]
2025-10-13 13:33 ` Linus Walleij
2025-10-10 18:58 ` Shenwei Wang
2025-10-10 19:31 ` Andrew Lunn
2025-10-13 14:44 ` Shenwei Wang
2025-10-13 14:56 ` Andrew Lunn
2025-10-13 16:04 ` Shenwei Wang
2025-10-13 16:55 ` Andrew Lunn
2025-10-13 18:41 ` Shenwei Wang
2025-10-13 19:14 ` Andrew Lunn
2025-10-09 22:27 ` [PATCH v3 4/4] arm64: dts: imx8ulp: Add rpmsg node under imx_rproc Shenwei Wang
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