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@0 {
compatible = "fsl,imx-rpmsg-gpio";
reg = <0>;
};
gpio@1 {
compatible = "fsl,imx-rpmsg-gpio";
reg = <1>;
};
...
};
rpmsg-i2c-channel {
i2c@0 {
compatible = "fsl,imx-rpmsg-i2c";
reg = <0>;
};
};
...
};
};
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
Cc: Mathieu Poirier <[email protected]>
Cc: Arnaud POULIQUEN <[email protected]>
Cc: Linus Walleij <[email protected]>
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 | 129 +++++
arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 27 +
drivers/gpio/Kconfig | 17 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-imx-rpmsg.c | 488 ++++++++++++++++++
drivers/remoteproc/imx_rproc.c | 126 +++++
include/linux/rpmsg/imx_rpmsg.h | 48 ++
7 files changed, 836 insertions(+)
create mode 100644 drivers/gpio/gpio-imx-rpmsg.c
create mode 100644 include/linux/rpmsg/imx_rpmsg.h
--
2.43.0
