u-boot-brain/doc/device-tree-bindings/mailbox/k3-secure-proxy.txt

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Texas Instruments' K3 Secure Proxy
===================================
The Texas Instruments' K3 Secure Proxy is a mailbox controller that has
configurable threads maintained by System power processor. Each thread
has different address space that can be used to send or receive messages.
Secure Proxy Device Node:
===========================
Required properties:
--------------------
- compatible: Shall be: "ti,am654-secure-proxy"
- reg-names data - Map the data region
scfg - Map the secure configuration region
rt - Map the Realtime region.
- reg: Contains the register map per reg-names.
- #mbox-cells Shall be 1. Contains the thread ID.
Example:
--------
secproxy: secproxy@285b0000 {
compatible = "ti,am654-secure-proxy";
reg = <0x2a380000 0x80000>,
<0x2a400000 0x80000>,
<0x2a480000 0x80000>;
reg-names = "rt", "scfg", "data";
#mbox-cells = <1>;
};
client:
systemcontroller: systemcontroller {
[...]
# RX thread ID is 4.
# TX thread ID is 5.
mboxes= <&secproxy 4>,
<&secproxy 5>;
[...]
};