linux/Documentation/devicetree/bindings/misc/smc.txt
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   1Broadcom Secure Monitor Bounce buffer
   2-----------------------------------------------------
   3This binding defines the location of the bounce buffer
   4used for non-secure to secure communications.
   5
   6Required properties:
   7- compatible : "bcm,kona-smc"
   8- reg : Location and size of bounce buffer
   9
  10Example:
  11        smc@0x3404c000 {
  12                compatible = "bcm,bcm11351-smc", "bcm,kona-smc";
  13                reg = <0x3404c000 0x400>; //1 KiB in SRAM
  14        };
  15