This series adds support for the "hardware message box" in sun8i, sun9i, and sun50i SoCs, used for communication with the ARISC management processor (the platform's equivalent of the ARM SCP). The end goal is to use the arm_scpi driver as a client, communicating with firmware running on the ARISC CPU, or to use the mailbox to forward NMIs that the firmware picks up from R_INTC. Changes from v1: - Marked message box clocks as critical instead of hacks in the driver - 8 unidirectional channels instead of 4 bidirectional pairs - Use per-SoC compatible strings and an A31 fallback compatible - Dropped the mailbox framework patch - Include DT patches for SoCs that document the message box Samuel Holland (10): clk: sunxi-ng: sun8i: Mark the msgbox clock as critical clk: sunxi-ng: sun9i: Mark the msgbox clock as critical clk: sunxi-ng: sun50i: Mark the msgbox clock as critical dt-bindings: mailbox: Add a sunxi message box binding mailbox: sunxi-msgbox: Add a new mailbox driver ARM: dts: sunxi: a80: Add msgbox node ARM: dts: sunxi: a83t: Add msgbox node ARM: dts: sunxi: h3/h5: Add msgbox node arm64: dts: allwinner: a64: Add msgbox node arm64: dts: allwinner: h6: Add msgbox node .../bindings/mailbox/sunxi-msgbox.txt | 44 +++ arch/arm/boot/dts/sun8i-a83t.dtsi | 10 + arch/arm/boot/dts/sun9i-a80.dtsi | 10 + arch/arm/boot/dts/sunxi-h3-h5.dtsi | 10 + arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 10 + arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 10 + drivers/clk/sunxi-ng/ccu-sun50i-a64.c | 2 +- drivers/clk/sunxi-ng/ccu-sun50i-h6.c | 2 +- drivers/clk/sunxi-ng/ccu-sun8i-a23.c | 2 +- drivers/clk/sunxi-ng/ccu-sun8i-a33.c | 2 +- drivers/clk/sunxi-ng/ccu-sun8i-a83t.c | 2 +- drivers/clk/sunxi-ng/ccu-sun8i-h3.c | 2 +- drivers/clk/sunxi-ng/ccu-sun9i-a80.c | 2 +- drivers/mailbox/Kconfig | 11 + drivers/mailbox/Makefile | 2 + drivers/mailbox/sunxi-msgbox.c | 315 ++++++++++++++++++ 16 files changed, 429 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/mailbox/sunxi-msgbox.txt create mode 100644 drivers/mailbox/sunxi-msgbox.c -- 2.19.2
