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FROMLIST: of: irq: document properties for wakeup interrupt parent

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Some interrupt controllers in a SoC, are always powered on and have a
select interrupts routed to them, so that they can wakeup the SoC from
suspend. Add wakeup-parent DT property to refer to these interrupt
controllers.

Cc: [email protected]
Signed-off-by: Lina Iyer <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>

BUG: 141169320
TEST: Build and boot

Change-Id: Idf50e6db657e9d08e369878c261c0d781523ce35
Signed-off-by: Maulik Shah <[email protected]>
Link: https://patchwork.kernel.org/patch/11145359
This commit is contained in:
Lina Iyer 2019-09-13 15:59:13 -06:00 • committed by Todd Kjos
commit 18af63b34e
1 changed files with 12 additions and 0 deletions
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12
Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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@ -108,3 +108,15 @@ commonly used:
sensitivity = <7>;
};
};
3) Interrupt wakeup parent
--------------------------
Some interrupt controllers in a SoC, are always powered on and have a select
interrupts routed to them, so that they can wakeup the SoC from suspend. These
interrupt controllers do not fall into the category of a parent interrupt
controller and can be specified by the "wakeup-parent" property and contain a
single phandle referring to the wakeup capable interrupt controller.
Example:
wakeup-parent = <&pdc_intc>;