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1* Generic Mailbox Controller and client driver bindings2 3Generic binding to provide a way for Mailbox controller drivers to4assign appropriate mailbox channel to client drivers.5 6* Mailbox Controller7 8Required property:9- #mbox-cells: Must be at least 1. Number of cells in a mailbox10 specifier.11 12Example:13 mailbox: mailbox {14 ...15 #mbox-cells = <1>;16 };17 18 19* Mailbox Client20 21Required property:22- mboxes: List of phandle and mailbox channel specifiers.23 24Optional property:25- mbox-names: List of identifier strings for each mailbox channel.26- shmem : List of phandle pointing to the shared memory(SHM) area between the27 users of these mailboxes for IPC, one for each mailbox. This shared28 memory can be part of any memory reserved for the purpose of this29 communication between the mailbox client and the remote.30 31 32Example:33 pwr_cntrl: power {34 ...35 mbox-names = "pwr-ctrl", "rpc";36 mboxes = <&mailbox 0 &mailbox 1>;37 };38 39Example with shared memory(shmem):40 41 sram: sram@50000000 {42 compatible = "mmio-sram";43 reg = <0x50000000 0x10000>;44 45 #address-cells = <1>;46 #size-cells = <1>;47 ranges = <0 0x50000000 0x10000>;48 49 cl_shmem: shmem@0 {50 compatible = "client-shmem";51 reg = <0x0 0x200>;52 };53 };54 55 client@2e000000 {56 ...57 mboxes = <&mailbox 0>;58 shmem = <&cl_shmem>;59 ..60 };61