Hi, 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. I mark this as v3 because it is a continuation of: https://lore.kernel.org/linux-arm-kernel/20241017163649.3007062-1-tudor.ambarus@xxxxxxxxxx/ Changes in v3: - decouple the mailbox controller driver from the ACPM protocol driver - address Krzysztof's eview comments Thanks, ta Tudor Ambarus (3): dt-bindings: mailbox: add bindings for samsung,exynos mailbox: add samsung exynos driver MAINTAINERS: add entry for samsung exynos mailbox driver .../bindings/mailbox/samsung,exynos.yaml | 70 +++++++++ MAINTAINERS | 9 ++ drivers/mailbox/Kconfig | 11 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/exynos-mailbox.c | 143 ++++++++++++++++++ 5 files changed, 235 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/samsung,exynos.yaml create mode 100644 drivers/mailbox/exynos-mailbox.c -- 2.47.0.338.g60cca15819-goog
