[PATCH v4 0/3] greybus: Add BeaglePlay Greybus Driver

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BeaglePlay is a board by BeagleBoard.org. It contains a main AM62
processor with a CC1352 co-processor. They are connected over UART.

Greybus is a hardware protocol that was designed to provide Unipro with a
sane application layer. It can be used in IOT and IIOT applications
keeping the intelligence on the host.

This driver has been tested on BeaglePlay by BeagleBoard.org. It serves
as Greybus Host device and communicates with BeaglePlay CC1352
co-processor which serves as Greybus SVC. This replaces the old setup with
bcfserial, wpanusb and GBridge. This driver also contains async HDLC code
since communication with SVC take place over UART using HDLC.

This driver has been created as a part of my Google Summer of Code 2023.
For more information, take a look at my blog.

This patchset has been tested over `next-20230825`.

My GSoC23 Blog: https://programmershideaway.xyz/tags/gsoc23/
Zephyr App: https://git.beagleboard.org/gsoc/greybus/cc1352-firmware
GitHub Branch: https://github.com/Ayush1325/linux/tree/gb-beagleplay
Video Demo: https://youtu.be/GVuIB7i5pjk

This the v4 of this patch
v3 -> v4:
- Add DT Bindings
- Reorder commits
- Improve commit messages

v2 -> v3:
- Move gb-beagleplay out of staging

v1 -> v2:
- Combine the driver into a single file
- Remove redundant code
- Fix Checkpatch complaints
- Other suggested changes

Ayush Singh (3):
  dt-bindings: Add beaglecc1352
  greybus: Add BeaglePlay Linux Driver
  dts: ti: k3-am625-beagleplay: Add beaglecc1352

 .../bindings/serial/beaglecc1352.yaml         |  25 +
 MAINTAINERS                                   |   7 +
 .../arm64/boot/dts/ti/k3-am625-beagleplay.dts |   4 +
 drivers/greybus/Kconfig                       |  10 +
 drivers/greybus/Makefile                      |   3 +-
 drivers/greybus/gb-beagleplay.c               | 494 ++++++++++++++++++
 6 files changed, 542 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/serial/beaglecc1352.yaml
 create mode 100644 drivers/greybus/gb-beagleplay.c


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