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Altera Mailbox Driver
=====================
Required properties:
- compatible : "altr,mailbox-1.0".
- reg : physical base address of the mailbox and length of
memory mapped region.
- #mbox-cells: Common mailbox binding property to identify the number
of cells required for the mailbox specifier. Should be 1.
Optional properties:
- interrupt-parent : interrupt source phandle.
- interrupts : interrupt number. The interrupt specifier format
depends on the interrupt controller parent.
Example:
mbox_tx: mailbox@0x100 {
compatible = "altr,mailbox-1.0";
reg = <0x100 0x8>;
interrupt-parent = < &gic_0 >;
interrupts = <5>;
#mbox-cells = <1>;
};
mbox_rx: mailbox@0x200 {
compatible = "altr,mailbox-1.0";
reg = <0x200 0x8>;
interrupt-parent = < &gic_0 >;
interrupts = <6>;
#mbox-cells = <1>;
};
Mailbox client
===============
"mboxes" and the optional "mbox-names" (please see
Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value
of the mboxes property should contain a phandle to the mailbox controller
device node and second argument is the channel index. It must be 0 (hardware
support only one channel).The equivalent "mbox-names" property value can be
used to give a name to the communication channel to be used by the client user.
Example:
mclient0: mclient0@0x400 {
compatible = "client-1.0";
reg = <0x400 0x10>;
mbox-names = "mbox-tx", "mbox-rx";
mboxes = <&mbox_tx 0>,
<&mbox_rx 0>;
};
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