Mailbox is used by the Rockchip CPU cores to communicate requests to MCU processorm. This driver is found on RK3368 SoCs. The Mailbox module is a simple APB peripheral that allows both the Cortex-A53 MCU system to communicate by writing operation to generate interrupt. The registers are accessible by both CPU via APB interface. Tested on RK3368 SDK board. Caesar Wang (3): dt-bindings: Add document of Rockchip mailbox mailbox: rockchip: Add Rockchip mailbox driver ARM64: dts: rk3368: Add mailbox device nodes .../bindings/mailbox/rockchip-mailbox.txt | 33 +++ arch/arm64/boot/dts/rockchip/rk3368.dtsi | 13 + drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/rockchip-mailbox.c | 317 +++++++++++++++++++++ 5 files changed, 374 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/rockchip-mailbox.txt create mode 100644 drivers/mailbox/rockchip-mailbox.c -- 1.9.1
