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+Texas Instruments' Secure Proxy
+========================================
+
+The Texas Instruments' secure proxy is a mailbox controller that has
+configurable queues selectable at SoC(System on Chip) integration. The
+Message manager is broken up into different address regions that are
+called "threads" or "proxies" - each instance is unidirectional and is
+instantiated at SoC integration level by system controller to indicate
+receive or transmit path.
+
+Message Manager Device Node:
+===========================
+Required properties:
+--------------------
+- compatible: Shall be "ti,am654-secure-proxy"
+- reg-names target_data - Map the proxy data region
+ rt - Map the realtime status region
+ scfg - Map the configuration region
+- reg: Contains the register map per reg-names.
+- #mbox-cells Shall be 1 and shall refer to the transfer path
+ called thread.
+- interrupt-names: Contains interrupt names matching the rx transfer path
+ for a given SoC. Receive interrupts shall be of the
+ format: "rx_<PID>".
+- interrupts: Contains the interrupt information corresponding to
+ interrupt-names property.
+
+Example(AM654):
+------------
+
+ secure_proxy: mailbox@32c00000 {
+ compatible = "ti,am654-secure-proxy";
+ #mbox-cells = <1>;
+ reg-names = "target_data", "rt", "scfg";
+ reg = <0x0 0x32c00000 0x0 0x100000>,
+ <0x0 0x32400000 0x0 0x100000>,
+ <0x0 0x32800000 0x0 0x100000>;
+ interrupt-names = "rx_011";
+ interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+ dmsc: dmsc {
+ [...]
+ mbox-names = "rx", "tx";
+ # RX Thread ID is 11
+ # TX Thread ID is 13
+ mboxes= <&secure_proxy 11>,
+ <&secure_proxy 13>;
+ [...]
+ };