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