| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | Altera Mailbox Driver |
| 2 | ===================== |
| 3 | |
| 4 | Required properties: |
| 5 | - compatible : "altr,mailbox-1.0". |
| 6 | - reg : physical base address of the mailbox and length of |
| 7 | memory mapped region. |
| 8 | - #mbox-cells: Common mailbox binding property to identify the number |
| 9 | of cells required for the mailbox specifier. Should be 1. |
| 10 | |
| 11 | Optional properties: |
| 12 | - interrupts : interrupt number. The interrupt specifier format |
| 13 | depends on the interrupt controller parent. |
| 14 | |
| 15 | Example: |
| 16 | mbox_tx: mailbox@100 { |
| 17 | compatible = "altr,mailbox-1.0"; |
| 18 | reg = <0x100 0x8>; |
| 19 | interrupt-parent = < &gic_0 >; |
| 20 | interrupts = <5>; |
| 21 | #mbox-cells = <1>; |
| 22 | }; |
| 23 | |
| 24 | mbox_rx: mailbox@200 { |
| 25 | compatible = "altr,mailbox-1.0"; |
| 26 | reg = <0x200 0x8>; |
| 27 | interrupt-parent = < &gic_0 >; |
| 28 | interrupts = <6>; |
| 29 | #mbox-cells = <1>; |
| 30 | }; |
| 31 | |
| 32 | Mailbox client |
| 33 | =============== |
| 34 | "mboxes" and the optional "mbox-names" (please see |
| 35 | Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value |
| 36 | of the mboxes property should contain a phandle to the mailbox controller |
| 37 | device node and second argument is the channel index. It must be 0 (hardware |
| 38 | support only one channel).The equivalent "mbox-names" property value can be |
| 39 | used to give a name to the communication channel to be used by the client user. |
| 40 | |
| 41 | Example: |
| 42 | mclient0: mclient0@400 { |
| 43 | compatible = "client-1.0"; |
| 44 | reg = <0x400 0x10>; |
| 45 | mbox-names = "mbox-tx", "mbox-rx"; |
| 46 | mboxes = <&mbox_tx 0>, |
| 47 | <&mbox_rx 0>; |
| 48 | }; |