[PATCH v4 0/3] firmware: add Exynos ACPM protocol driver

[Tudor Ambarus]

Alive Clock and Power Manager (ACPM) Message Protocol is defined for
the purpose of communication between the ACPM firmware and masters
(AP, AOC, ...). ACPM firmware operates on the Active Power Management
(APM) module that handles overall power activities.

This protocol library provides the interface for all the client drivers
making use of the features offered by the APM. Add ACPM protocol support.

Changes in v4:
- rename bindings filename based on compatible
- bindings: drop nodename
- bindings: drop mboxes description
- bindings: remove initdata-base prop, and define it based on compatible
- bindings: move additionalProperties after the required block
- bindings: drop firmware node from examples
- bindings: drop unused label in examples
- bindings: rename node to power-management
- driver: switch 2 macros to inline functions for readability
- driver: add checl to avoid shift overflow on these inline functions
- driver: use ktime_to_ms(ktime_get()) to record ktime
- driver: use the default non-relaxed IO accessors
- driver: remove atomic handling
- driver: remove stray of_match_ptr()
- driver: move header in include/linux/firmware
- driver: make sure to, from are 32-bit aligned and count is a 32bit
  quantity before calling __{ioread, write}32_copy
- driver: reject IRQ channels (not supported yet_ at the top of do_xfer,
  instead of when waiting for response.

Changes in v3:
- decouple the mailbox controller driver from the ACPM protocol driver
- address Krzysztof's eview comments 
- add ACPM PMIC protocol helpers

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

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

Signed-off-by: Tudor Ambarus <tudor.ambarus at linaro.org>
---
Tudor Ambarus (3):
      dt-bindings: firmware: add google,gs101-acpm-ipc binding
      firmware: add Exynos ACPM protocol driver
      MAINTAINERS: add entry for the Samsung Exynos ACPM mailbox protocol

 .../bindings/firmware/google,gs101-acpm-ipc.yaml   |  51 ++
 MAINTAINERS                                        |  10 +
 drivers/firmware/Kconfig                           |   1 +
 drivers/firmware/Makefile                          |   1 +
 drivers/firmware/samsung/Kconfig                   |  14 +
 drivers/firmware/samsung/Makefile                  |   4 +
 drivers/firmware/samsung/exynos-acpm-pmic.c        | 239 ++++++
 drivers/firmware/samsung/exynos-acpm-pmic.h        |  24 +
 drivers/firmware/samsung/exynos-acpm.c             | 800 +++++++++++++++++++++
 drivers/firmware/samsung/exynos-acpm.h             |  15 +
 .../linux/firmware/samsung/exynos-acpm-protocol.h  |  55 ++
 11 files changed, 1214 insertions(+)
---
base-commit: fac04efc5c793dccbd07e2d59af9f90b7fc0dca4
change-id: 20241212-b4-acpm-v4-upstream-firmware-4633e1f9a0ab

Best regards,
-- 
Tudor Ambarus <tudor.ambarus at linaro.org>