u-boot/doc/device-tree-bindings/firmware/ti,j721e-dm-sci.txt

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Bindings for Texas Instruments System Control Interface (TI-SCI) Message
Protocol for Device Manager(DM) to TI Foundational Security(TIFS)
Firmware communication
Required properties:
--------------------
- compatible: should be "ti,j721e-dm-sci"
- mbox-names:
"rx" - Mailbox corresponding to receive path
"tx" - Mailbox corresponding to transmit path
- mboxes: Mailboxes corresponding to the mbox-names. Each value of the mboxes
property should contain a phandle to the mailbox controller device
node and an args specifier that will be the phandle to the intended
sub-mailbox child node to be used for communication.
- ti,host-id: Host ID to use for communication.
Optional Properties:
--------------------
- ti,secure-host: If the host is defined as secure.
Example:
--------
dm_tifs: dm-tifs {
compatible = "ti,j721e-dm-sci";
ti,host-id = <3>;
ti,secure-host;
mbox-names = "rx", "tx";
mboxes= <&mcu_secproxy 21>,
<&mcu_secproxy 23>;
};