[PATCH v2 00/10] Allwinner sunxi message box support

Samuel Holland
2019-03-01T05:30:47Z

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