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ST Microelectronics Mailbox Driver
Each ST Mailbox IP currently consists of 4 instances of 32 channels. Messages
are passed between Application and Remote processors using shared memory.
Controller
----------
Required properties:
- compatible : Should be "st,stih407-mailbox"
- reg : Offset and length of the device's register set
- mbox-name : Name of the mailbox
- #mbox-cells: : Must be 2
<&phandle instance channel direction>
phandle : Label name of controller
instance : Instance number
channel : Channel number
Optional properties
- interrupts : Contains the IRQ line for a Rx mailbox
Example:
mailbox0: mailbox@0 {
compatible = "st,stih407-mailbox";
reg = <0x08f00000 0x1000>;
interrupts = <GIC_SPI 1 IRQ_TYPE_NONE>;
#mbox-cells = <2>;
mbox-name = "a9";
};
Client
------
Required properties:
- compatible : Many (See the client docs)
- reg : Shared (between Application and Remote) memory address
- 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:
mailbox_test {
compatible = "mailbox_test";
reg = <0x[shared_memory_address], [shared_memory_size]>;
mboxes = <&mailbox2 0 1>, <&mailbox0 2 1>;
mbox-names = "tx", "rx";
};
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