projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b5f67376 LJ |
1 | ST Microelectronics Mailbox Driver |
| 2 | ||
| 3 | Each ST Mailbox IP currently consists of 4 instances of 32 channels. Messages | |
| 4 | are passed between Application and Remote processors using shared memory. | |
| 5 | ||
| 6 | Controller | |
| 7 | ---------- | |
| 8 | ||
| 9 | Required properties: | |
| 10 | - compatible : Should be "st,stih407-mailbox" | |
| 11 | - reg : Offset and length of the device's register set | |
| 12 | - mbox-name : Name of the mailbox | |
| 13 | - #mbox-cells: : Must be 2 | |
| 14 | <&phandle instance channel direction> | |
| 15 | phandle : Label name of controller | |
| 16 | instance : Instance number | |
| 17 | channel : Channel number | |
| 18 | ||
| 19 | Optional properties | |
| 20 | - interrupts : Contains the IRQ line for a Rx mailbox | |
| 21 | ||
| 22 | Example: | |
| 23 | ||
| 24 | mailbox0: mailbox@0 { | |
| 25 | compatible = "st,stih407-mailbox"; | |
| 26 | reg = <0x08f00000 0x1000>; | |
| 27 | interrupts = <GIC_SPI 1 IRQ_TYPE_NONE>; | |
| 28 | #mbox-cells = <2>; | |
| 29 | mbox-name = "a9"; | |
| 30 | }; | |
| 31 | ||
| 32 | Client | |
| 33 | ------ | |
| 34 | ||
| 35 | Required properties: | |
| 36 | - compatible : Many (See the client docs) | |
| 37 | - reg : Shared (between Application and Remote) memory address | |
| 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 | mailbox_test { | |
| c4280137 | 47 | compatible = "mailbox-test"; |
| b5f67376 LJ |
48 | reg = <0x[shared_memory_address], [shared_memory_size]>; |
| 49 | mboxes = <&mailbox2 0 1>, <&mailbox0 2 1>; | |
| 50 | mbox-names = "tx", "rx"; | |
| 51 | }; |