linux-pinenote/Documentation/devicetree/bindings/misc/smc.txt

Broadcom Secure Monitor Bounce buffer
-----------------------------------------------------
This binding defines the location of the bounce buffer
used for non-secure to secure communications.

Required properties:
- compatible : "brcm,kona-smc"
- DEPRECATED: compatible : "bcm,kona-smc"
- reg : Location and size of bounce buffer

Example:
	smc@0x3404c000 {
		compatible = "brcm,bcm11351-smc", "brcm,kona-smc";
		reg = <0x3404c000 0x400>; //1 KiB in SRAM
	};