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author | Ley Foon Tan <lftan@altera.com> | 2015-02-04 11:32:18 +0300 |
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committer | Jassi Brar <jaswinder.singh@linaro.org> | 2015-02-06 08:28:27 +0300 |
commit | f62092f6d77dfd9214ae753a24b76ba4ecd801d7 (patch) | |
tree | bbd52e987eb8151254d2bddfb8fe2e907e0f4dce /Documentation/devicetree/bindings/mailbox | |
parent | 01340df8d3cd4d8f1773d5f1f569b77bbfce31ad (diff) | |
download | linux-f62092f6d77dfd9214ae753a24b76ba4ecd801d7.tar.xz |
mailbox: Add Altera mailbox driver
The Altera mailbox allows for interprocessor communication. It supports
only one channel and work as either sender or receiver.
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Diffstat (limited to 'Documentation/devicetree/bindings/mailbox')
-rw-r--r-- | Documentation/devicetree/bindings/mailbox/altera-mailbox.txt | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mailbox/altera-mailbox.txt b/Documentation/devicetree/bindings/mailbox/altera-mailbox.txt new file mode 100644 index 000000000000..c2619797ce0c --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/altera-mailbox.txt @@ -0,0 +1,49 @@ +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>; + }; |