android-5.4/FROMLIST-of-irq-document-properties-for-wakeup-interrupt-parent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Lina Iyer <ilina@codeaurora.org>
Date: Fri, 13 Sep 2019 15:59:13 -0600
Subject: FROMLIST: 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@vger.kernel.org
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

BUG: 141169320
TEST: Build and boot

Change-Id: Idf50e6db657e9d08e369878c261c0d781523ce35
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Link: https://patchwork.kernel.org/patch/11145359
---
 .../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 4a3ee253f7f0..4ebfa0008781 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>;