[PATCH v5 0/3] mailbox: add Samsung Exynos driver

[Tudor Ambarus]

The samsung exynos mailbox controller has 16 flag bits for hardware
interrupt generation and a shared register for passing mailbox messages.
When the controller is used by the ACPM protocol the shared register is
ignored and the mailbox controller acts as a doorbell. The controller
just raises the interrupt to APM after the ACPM protocol has written
the message to SRAM.

Changes in v5:
- fix dt-bindings by using the correct compatible name in the example
- drop redundand "bindings" from the dt-bindings patch subject
- rebase on top of v6.13-rc3
- Link to v4: https://lore.kernel.org/r/20241212-acpm-v4-upstream-mbox-v4-0-02f8de92cfaf@xxxxxxxxxx

Changes in v4:
- rename bindings file to be based on compatible: google,gs101-acpm-mbox
- specify doorbell or data mode via '#mbox-cells' dt property. Update
  driver and introduce exynos_mbox_of_xlate() to parse the mode.
- s/samsung/Samsung/, s/exynos/Exynos/
- use writel instead of writel_relaxed
- remove stray of_match_ptr()
- Link to v3: https://lore.kernel.org/linux-arm-kernel/20241205174137.190545-1-tudor.ambarus@xxxxxxxxxx/

Changes in v3:
- decouple the mailbox controller driver from the ACPM protocol driver
- address Krzysztof's review comments

v2:
https://lore.kernel.org/linux-arm-kernel/20241017163649.3007062-1-tudor.ambarus@xxxxxxxxxx/

v1:
https://lore.kernel.org/linux-arm-kernel/20241004165301.1979527-1-tudor.ambarus@xxxxxxxxxx/

Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxx>
---
Tudor Ambarus (3):
      dt-bindings: mailbox: add google,gs101-mbox
      mailbox: add Samsung Exynos driver
      MAINTAINERS: add entry for Samsung Exynos mailbox driver

 .../bindings/mailbox/google,gs101-mbox.yaml        |  79 +++++++++
 MAINTAINERS                                        |  10 ++
 drivers/mailbox/Kconfig                            |  11 ++
 drivers/mailbox/Makefile                           |   2 +
 drivers/mailbox/exynos-mailbox.c                   | 184 +++++++++++++++++++++
 include/dt-bindings/mailbox/google,gs101.h         |  14 ++
 6 files changed, 300 insertions(+)
---
base-commit: 78d4f34e2115b517bcbfe7ec0d018bbbb6f9b0b8
change-id: 20241212-acpm-v4-upstream-mbox-948714004b05

Best regards,
-- 
Tudor Ambarus <tudor.ambarus@xxxxxxxxxx>