Kernel-4.18.0-80.el8_hisilicon,hi3660-mailbox

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>;
};