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

[Shenwei Wang]

Support the remote devices on the remote processor via the RPMSG bus on
i.MX platform.

The expected DTS layout structure is following:

    cm33: remoteproc-cm33 {
             compatible = "fsl,imx8ulp-cm33";

             rpmsg {
                     rpmsg-io-channel {
                             gpio at 0 {
                                     compatible = "fsl,imx-rpmsg-gpio";
                                     reg = <0>;
                             };

                             gpio at 1 {
                                     compatible = "fsl,imx-rpmsg-gpio";
                                     reg = <1>;
                             };

                             ...
                     };

                     rpmsg-i2c-channel {
                             i2c at 0 {
                                     compatible = "fsl,imx-rpmsg-i2c";
                                     reg = <0>;
                             };
                     };

                     ...
             };
     };


Shenwei Wang (4):
  dt-bindings: remoteproc: imx_rproc: Add "rpmsg" subnode support
  remoteproc: imx_rproc: Populate devices under "rpmsg" subnode
  gpio: imx-rpmsg: add imx-rpmsg GPIO driver
  arm64: dts: imx8ulp: Add rpmsg node under imx_rproc

 .../bindings/remoteproc/fsl,imx-rproc.yaml    | 117 ++++
 arch/arm64/boot/dts/freescale/imx8ulp.dtsi    |  27 +
 drivers/gpio/Kconfig                          |  11 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-imx-rpmsg.c                 | 559 ++++++++++++++++++
 drivers/remoteproc/imx_rproc.c                | 125 ++++
 include/linux/imx_rpmsg.h                     |  55 ++
 7 files changed, 895 insertions(+)
 create mode 100644 drivers/gpio/gpio-imx-rpmsg.c
 create mode 100644 include/linux/imx_rpmsg.h

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2.43.0