linux-kernel - [PATCH 05/12] of: irq: document properties for wakeup interrupt parent

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Date:   Thu, 14 Nov 2019 11:35:14 -0700
From:   Lina Iyer <ilina@...eaurora.org>
To:     swboyd@...omium.org, maz@...nel.org, linus.walleij@...aro.org,
        bjorn.andersson@...aro.org
Cc:     evgreen@...omium.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, mkshah@...eaurora.org,
        linux-gpio@...r.kernel.org, agross@...nel.org,
        dianders@...omium.org, Lina Iyer <ilina@...eaurora.org>,
        devicetree@...r.kernel.org
Subject: [PATCH 05/12] of: irq: document properties for wakeup interrupt 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. Add wakeup-parent DT property to refer to these interrupt
controllers.

Cc: devicetree@...r.kernel.org
Signed-off-by: Lina Iyer <ilina@...eaurora.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
---
Changes in v1:
	- Remove whitespace at end of patch
---
 .../devicetree/bindings/interrupt-controller/interrupts.txt  | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt b/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
index 4a3ee25..4ebfa00 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
@@ -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>;
-- 
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