| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | Hisilicon Hi3660 Mailbox Controller |
| 2 | |
| 3 | Hisilicon Hi3660 mailbox controller supports up to 32 channels. Messages |
| 4 | are passed between processors, including application & communication |
| 5 | processors, MCU, HIFI, etc. Each channel is unidirectional and accessed |
| 6 | by using MMIO registers; it supports maximum to 8 words message. |
| 7 | |
| 8 | Controller |
| 9 | ---------- |
| 10 | |
| 11 | Required properties: |
| 12 | - compatible: : Shall be "hisilicon,hi3660-mbox" |
| 13 | - reg: : Offset and length of the device's register set |
| 14 | - #mbox-cells: : Must be 3 |
| 15 | <&phandle channel dst_irq ack_irq> |
| 16 | phandle : Label name of controller |
| 17 | channel : Channel number |
| 18 | dst_irq : Remote interrupt vector |
| 19 | ack_irq : Local interrupt vector |
| 20 | |
| 21 | - interrupts: : Contains the two IRQ lines for mailbox. |
| 22 | |
| 23 | Example: |
| 24 | |
| 25 | mailbox: mailbox@e896b000 { |
| 26 | compatible = "hisilicon,hi3660-mbox"; |
| 27 | reg = <0x0 0xe896b000 0x0 0x1000>; |
| 28 | interrupts = <0x0 0xc0 0x4>, |
| 29 | <0x0 0xc1 0x4>; |
| 30 | #mbox-cells = <3>; |
| 31 | }; |
| 32 | |
| 33 | Client |
| 34 | ------ |
| 35 | |
| 36 | Required properties: |
| 37 | - compatible : See the client docs |
| 38 | - mboxes : Standard property to specify a Mailbox (See ./mailbox.txt) |
| 39 | Cells must match 'mbox-cells' (See Controller docs above) |
| 40 | |
| 41 | Optional properties |
| 42 | - mbox-names : Name given to channels seen in the 'mboxes' property. |
| 43 | |
| 44 | Example: |
| 45 | |
| 46 | stub_clock: stub_clock@e896b500 { |
| 47 | compatible = "hisilicon,hi3660-stub-clk"; |
| 48 | reg = <0x0 0xe896b500 0x0 0x0100>; |
| 49 | #clock-cells = <1>; |
| 50 | mboxes = <&mailbox 13 3 0>; |
| 51 | }; |