linux-kernel - RE: [PATCH v7 0/4] Enable Remote GPIO over RPMSG on i.MX Platform

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Message-ID:
 <PAXPR04MB9185CDBDD02812933DEB62C08962A@PAXPR04MB9185.eurprd04.prod.outlook.com>
Date: Tue, 10 Feb 2026 17:11:50 +0000
From: Shenwei Wang <shenwei.wang@....com>
To: Linus Walleij <linusw@...nel.org>, Bartosz Golaszewski <brgl@...nel.org>,
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>, Shawn Guo
	<shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Jonathan Corbet
	<corbet@....net>
CC: Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam
	<festevam@...il.com>, Peng Fan <peng.fan@....com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-doc@...r.kernel.org"
	<linux-doc@...r.kernel.org>, dl-linux-imx <linux-imx@....com>,
	"arnaud.pouliquen@...s.st.com" <arnaud.pouliquen@...s.st.com>
Subject: RE: [PATCH v7 0/4] Enable Remote GPIO over RPMSG on i.MX Platform

Please disregard this patch set and use the new one instead.

Thanks,
Shenwei

> -----Original Message-----
> From: Shenwei Wang <shenwei.wang@....com>
> Sent: Tuesday, February 10, 2026 11:05 AM
> To: Linus Walleij <linusw@...nel.org>; Bartosz Golaszewski <brgl@...nel.org>;
> Rob Herring <robh@...nel.org>; Krzysztof Kozlowski <krzk+dt@...nel.org>;
> Conor Dooley <conor+dt@...nel.org>; Bjorn Andersson
> <andersson@...nel.org>; Mathieu Poirier <mathieu.poirier@...aro.org>; Shawn
> Guo <shawnguo@...nel.org>; Sascha Hauer <s.hauer@...gutronix.de>;
> Jonathan Corbet <corbet@....net>
> Cc: Pengutronix Kernel Team <kernel@...gutronix.de>; Fabio Estevam
> <festevam@...il.com>; Shenwei Wang <shenwei.wang@....com>; Peng Fan
> <peng.fan@....com>; linux-gpio@...r.kernel.org; devicetree@...r.kernel.org;
> linux-kernel@...r.kernel.org; linux-remoteproc@...r.kernel.org;
> imx@...ts.linux.dev; linux-arm-kernel@...ts.infradead.org; linux-
> doc@...r.kernel.org; dl-linux-imx <linux-imx@....com>;
> arnaud.pouliquen@...s.st.com
> Subject: [PATCH v7 0/4] 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.
> 
> Changes in v7:
>  - Reworked the driver to use the rpmsg_driver framework instead of
>    platform_driver, based on feedback from Bjorn and Arnaud.
>  - Updated gpio-rpmsg.yaml and imx_rproc.yaml according to comments from
>    Rob and Arnaud.
>  - Further refinements to gpio-rpmsg.yaml per Arnaud's feedback.
> 
> Changes in v6:
>  - make the driver more generic with the actions below:
>      rename the driver file to gpio-rpmsg.c
>      remove the imx related info in the function and variable names
>      rename the imx_rpmsg.h to rpdev_info.h
>      create a gpio-rpmsg.yaml and refer it in imx_rproc.yaml
>  - update the gpio-rpmsg.rst according to the feedback from Andrew and
>    move the source file to driver-api/gpio
>  - fix the bug reported by Zhongqiu Han
>  - remove the I2C related info
> 
> Changes in v5:
>  - move the gpio-rpmsg.rst from admin-guide to staging directory after
>    discussion with Randy Dunlap.
>  - add include files with some code improvements per Bartosz's comments.
> 
> Changes in v4:
>  - add a documentation to describe the transport protocol per Andrew's
>    comments.
>  - add a new handler to get the gpio direction.
> 
> Changes in v3:
>  - fix various format issue and return value check per Peng 's review
>    comments.
>  - add the logic to also populate the subnodes which are not in the
>    device map per Arnaud's request. (in imx_rproc.c)
>  - update the yaml per Frank's review comments.
> 
> Changes in v2:
>  - re-implemented the gpio driver per Linus Walleij's feedback by using
>    GPIOLIB_IRQCHIP helper library.
>  - fix various format issue per Mathieu/Peng 's review comments.
>  - update the yaml doc per Rob's feedback
> 
> Shenwei Wang (4):
>   dt-bindings: remoteproc: imx_rproc: Add "rpmsg" subnode support
>   docs: driver-api: gpio: rpmsg gpio driver over rpmsg bus
>   gpio: rpmsg: add generic rpmsg GPIO driver
>   arm64: dts: imx8ulp: Add rpmsg node under imx_rproc
> 
>  .../devicetree/bindings/gpio/gpio-rpmsg.yaml  |  55 ++
>  .../bindings/remoteproc/fsl,imx-rproc.yaml    |  53 ++
>  Documentation/driver-api/gpio/gpio-rpmsg.rst  | 236 +++++++
>  Documentation/driver-api/gpio/index.rst       |   1 +
>  arch/arm64/boot/dts/freescale/imx8ulp.dtsi    |  27 +
>  drivers/gpio/Kconfig                          |  16 +
>  drivers/gpio/Makefile                         |   1 +
>  drivers/gpio/gpio-rpmsg.c                     | 583 ++++++++++++++++++
>  8 files changed, 972 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/gpio-rpmsg.yaml
>  create mode 100644 Documentation/driver-api/gpio/gpio-rpmsg.rst
>  create mode 100644 drivers/gpio/gpio-rpmsg.c
> 
> --
> 2.43.0