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60 lines
1.3 KiB
60 lines
1.3 KiB
* Generic Mailbox Controller and client driver bindings |
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Generic binding to provide a way for Mailbox controller drivers to |
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assign appropriate mailbox channel to client drivers. |
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* Mailbox Controller |
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Required property: |
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- #mbox-cells: Must be at least 1. Number of cells in a mailbox |
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specifier. |
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Example: |
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mailbox: mailbox { |
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... |
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#mbox-cells = <1>; |
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}; |
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* Mailbox Client |
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Required property: |
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- mboxes: List of phandle and mailbox channel specifiers. |
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Optional property: |
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- mbox-names: List of identifier strings for each mailbox channel. |
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- shmem : List of phandle pointing to the shared memory(SHM) area between the |
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users of these mailboxes for IPC, one for each mailbox. This shared |
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memory can be part of any memory reserved for the purpose of this |
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communication between the mailbox client and the remote. |
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Example: |
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pwr_cntrl: power { |
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... |
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mbox-names = "pwr-ctrl", "rpc"; |
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mboxes = <&mailbox 0 &mailbox 1>; |
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}; |
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Example with shared memory(shmem): |
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sram: sram@50000000 { |
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compatible = "mmio-sram"; |
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reg = <0x50000000 0x10000>; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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ranges = <0 0x50000000 0x10000>; |
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cl_shmem: shmem@0 { |
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compatible = "client-shmem"; |
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reg = <0x0 0x200>; |
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}; |
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}; |
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client@2e000000 { |
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... |
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mboxes = <&mailbox 0>; |
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shmem = <&cl_shmem>; |
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.. |
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};
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