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Wed, 14 Jan 2026 09:09:09 -0800 (PST) Date: Wed, 14 Jan 2026 10:09:06 -0700 From: Mathieu Poirier To: Shenwei Wang Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Shawn Guo , Sascha Hauer , Jonathan Corbet , Pengutronix Kernel Team , Fabio Estevam , Peng Fan , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-imx@nxp.com Subject: Re: [PATCH v6 0/5] Enable Remote GPIO over RPMSG on i.MX Platform Message-ID: References: <20251212194341.966387-1-shenwei.wang@nxp.com> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251212194341.966387-1-shenwei.wang@nxp.com> On Fri, Dec 12, 2025 at 01:43:36PM -0600, Shenwei Wang wrote: > Support the remote devices on the remote processor via the RPMSG bus on > i.MX platform. > > 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 > NAK - I asked to use the virtio interface (in this case virtio-gpio), something I do not see in the above summary and the first 2 patches in this series. This work will not move forward until that happens. > 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 (5): > dt-bindings: remoteproc: imx_rproc: Add "rpmsg" subnode support > remoteproc: imx_rproc: Populate devices under "rpmsg" subnode > docs: driver-api: gpio: generic 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 | 49 ++ > .../bindings/remoteproc/fsl,imx-rproc.yaml | 54 ++ > Documentation/driver-api/gpio/gpio-rpmsg.rst | 232 +++++++++ > 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 | 490 ++++++++++++++++++ > drivers/remoteproc/imx_rproc.c | 143 +++++ > include/linux/rpmsg/rpdev_info.h | 33 ++ > 10 files changed, 1046 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 > create mode 100644 include/linux/rpmsg/rpdev_info.h > > -- > 2.43.0 >