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51 lines
1.3 KiB
51 lines
1.3 KiB
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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