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Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation

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This adds the APM X-Gene SLIMpro mailbox device tree
node documentation.

Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Duc Dang <dhdang@apm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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Duc Dang 2016-02-12 19:39:27 -08:00 committed by Jassi Brar
parent f700e84f41
commit 9b2396dd1e
1 changed files with 35 additions and 0 deletions
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Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt Normal file
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The APM X-Gene SLIMpro mailbox is used to communicate messages between
the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple
interrupt based door bell mechanism and can exchange simple messages using the
internal registers.
There are total of 8 interrupts in this mailbox. Each used for an individual
door bell (or mailbox channel).
Required properties:
- compatible: Should be as "apm,xgene-slimpro-mbox".
- reg: Contains the mailbox register address range.
- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the
the interrupt for mailbox channel 0 and interrupt 1 for
mailbox channel 1 and so likewise for the reminder.
- #mbox-cells: only one to specify the mailbox channel number.
Example:
Mailbox Node:
mailbox: mailbox@10540000 {
compatible = "apm,xgene-slimpro-mbox";
reg = <0x0 0x10540000 0x0 0xa000>;
#mbox-cells = <1>;
interrupts = <0x0 0x0 0x4>,
<0x0 0x1 0x4>,
<0x0 0x2 0x4>,
<0x0 0x3 0x4>,
<0x0 0x4 0x4>,
<0x0 0x5 0x4>,
<0x0 0x6 0x4>,
<0x0 0x7 0x4>,
};