Re: [PATCH v13 0/4] Enable Remote GPIO over RPMSG on i.MX Platform

Shenwei Wang
2026-04-23T19:08:33Z

> -----Original Message-----
> From: Mathieu Poirier <mathieu.poirier@linaro.org>
> Sent: Thursday, April 23, 2026 7:53 AM
> To: Shenwei Wang <shenwei.wang@nxp.com>; Andrew Lunn <andrew@lunn.ch>
> Cc: Linus Walleij <linusw@kernel.org>; Bartosz Golaszewski <brgl@kernel.org>;
> Jonathan Corbet <corbet@lwn.net>; Rob Herring <robh@kernel.org>; Krzysztof
> Kozlowski <krzk+dt@kernel.org>; Conor Dooley <conor+dt@kernel.org>; Bjorn
> Andersson <andersson@kernel.org>; Frank Li <frank.li@nxp.com>; Sascha Hauer
> <s.hauer@pengutronix.de>; Shuah Khan <skhan@linuxfoundation.org>; linux-
>
> Once again Andrew Lunn was left out.
>

Seems an issue of get_maintainer.pl, but he is included in the thread for the gpio‑rpmsg driver patch..
Cc: Andrew Lunn <andrew@lunn.ch>

> On Wed, 22 Apr 2026 at 15:29, Shenwei Wang <shenwei.wang@nxp.com>
> wrote:
> >
> > Support the remote devices on the remote processor via the RPMSG bus
> > on i.MX platform.
> >
> > Changes in v13:
> > - drop the support for legacy NXP firmware.
> > - remove the fixed_up hooks from the rpmsg gpio driver.
> > - code cleanup.
> >
> > Changes in v12:
> > - Fixed the "underline" warning reported by Randy.
> >
> > Changes in v11:
> > - Expand RPMSG for the first time per Shuah's review comment.
> >
> > Changes in v10:
> > - Update gpio-rpmsg.rst according to Daniel Baluta's review comments.
> > - Add a kernel CONFIG for fixed up handlers and only enable it on
> > i.MX products.
> > - Fixed bugs reported by kernel test robot.
> >
> > Changes in v9:
> > - Reuse the gpio-virtio design for command and IRQ type definitions.
> > - Remove msg_id, version, and vendor fields from the generic protocol.
> > - Add fixed-up handlers to support legacy firmware.
> >
> > Changes in v8:
> > - Add "depends on REMOTEPROC" in Kconfig to fix the build error reported
> > by the kernel test robot.
> > - Move the .rst patch before the .yaml patch.
> > - Handle the "ngpios" DT property based on Andrew's feedback.
> >
> > 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):
> > docs: driver-api: gpio: rpmsg gpio driver over rpmsg bus
> > dt-bindings: remoteproc: imx_rproc: Add "rpmsg" subnode support
> > 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 | 266 ++++++++
> > Documentation/driver-api/gpio/index.rst | 1 +
> > arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 25 +
> > drivers/gpio/Kconfig | 17 +
> > drivers/gpio/Makefile | 1 +
> > drivers/gpio/gpio-rpmsg.c | 573 ++++++++++++++++++
> > 8 files changed, 991 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
> >