Hisilicon Hi3660 Mailbox Controller Hisilicon Hi3660 mailbox controller supports up to 32 channels. Messages are passed between processors, including application & communication processors, MCU, HIFI, etc. Each channel is unidirectional and accessed by using MMIO registers; it supports maximum to 8 words message. Controller ---------- Required properties: - compatible: : Shall be "hisilicon,hi3660-mbox" - reg: : Offset and length of the device's register set - #mbox-cells: : Must be 3 <&phandle channel dst_irq ack_irq> phandle : Label name of controller channel : Channel number dst_irq : Remote interrupt vector ack_irq : Local interrupt vector - interrupts: : Contains the two IRQ lines for mailbox. Example: mailbox: mailbox@e896b000 { compatible = "hisilicon,hi3660-mbox"; reg = <0x0 0xe896b000 0x0 0x1000>; interrupts = <0x0 0xc0 0x4>, <0x0 0xc1 0x4>; #mbox-cells = <3>; }; Client ------ Required properties: - compatible : See the client docs - mboxes : Standard property to specify a Mailbox (See ./mailbox.txt) Cells must match 'mbox-cells' (See Controller docs above) Optional properties - mbox-names : Name given to channels seen in the 'mboxes' property. Example: stub_clock: stub_clock@e896b500 { compatible = "hisilicon,hi3660-stub-clk"; reg = <0x0 0xe896b500 0x0 0x0100>; #clock-cells = <1>; mboxes = <&mailbox 13 3 0>; };