> -----Original Message----- > From: Mathieu Poirier <[email protected]> > Sent: Wednesday, January 14, 2026 11:09 AM > To: Shenwei Wang <[email protected]> > Cc: Linus Walleij <[email protected]>; Bartosz Golaszewski <[email protected]>; > Rob Herring <[email protected]>; Krzysztof Kozlowski <[email protected]>; > Conor Dooley <[email protected]>; Bjorn Andersson > 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.
Never mind. Based on Bjorn’s review comments, I am restructuring the code to use the rpmsg_driver model instead of the platform_driver model. The virtio‑gpio use case is outside the scope of this patch set, since those devices are exposed over the rpmsg bus. Regards, Shenwei > > > 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 > >
