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