Documentation/devicetree/bindings/mailbox/altera-mailbox.txt

   1 Altera Mailbox Driver
   2 =====================
   3
   4 Required properties:
   5 - compatible :  "altr,mailbox-1.0".
   6 - reg :         physical base address of the mailbox and length of
   7                 memory mapped region.
   8 - #mbox-cells:  Common mailbox binding property to identify the number
   9                 of cells required for the mailbox specifier. Should be 1.
  10
  11 Optional properties:
  12 - interrupt-parent :    interrupt source phandle.
  13 - interrupts :          interrupt number. The interrupt specifier format
  14                         depends on the interrupt controller parent.
  15
  16 Example:
  17         mbox_tx: mailbox@0x100 {
  18                 compatible = "altr,mailbox-1.0";
  19                 reg = <0x100 0x8>;
  20                 interrupt-parent = < &gic_0 >;
  21                 interrupts = <5>;
  22                 #mbox-cells = <1>;
  23         };
  24
  25         mbox_rx: mailbox@0x200 {
  26                 compatible = "altr,mailbox-1.0";
  27                 reg = <0x200 0x8>;
  28                 interrupt-parent = < &gic_0 >;
  29                 interrupts = <6>;
  30                 #mbox-cells = <1>;
  31         };
  32
  33 Mailbox client
  34 ===============
  35 "mboxes" and the optional "mbox-names" (please see
  36 Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value
  37 of the mboxes property should contain a phandle to the mailbox controller
  38 device node and second argument is the channel index. It must be 0 (hardware
  39 support only one channel).The equivalent "mbox-names" property value can be
  40 used to give a name to the communication channel to be used by the client user.
  41
  42 Example:
  43         mclient0: mclient0@0x400 {
  44                 compatible = "client-1.0";
  45                 reg = <0x400 0x10>;
  46                 mbox-names = "mbox-tx", "mbox-rx";
  47                 mboxes = <&mbox_tx 0>,
  48                          <&mbox_rx 0>;
  49         };