linux-kernel - [PATCH v2 3/6] dt-bindings: brcmstb-gpio: document properties for wakeup

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Date:	Thu, 28 May 2015 19:14:07 -0700
From:	Gregory Fong <gregory.0xf0@...il.com>
To:	linux-gpio@...r.kernel.org
Cc:	Gregory Fong <gregory.0xf0@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	bcm-kernel-feedback-list@...adcom.com,
	Brian Norris <computersforpeace@...il.com>,
	devicetree@...r.kernel.org,
	Florian Fainelli <f.fainelli@...il.com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Russell King <linux@....linux.org.uk>
Subject: [PATCH v2 3/6] dt-bindings: brcmstb-gpio: document properties for wakeup

Some brcmstb GPIO controllers can be used to wake from suspend, so use the
de facto standard property 'wakeup-source' to mark the nodes of controllers
with that capability.

Also document interrupts-extended, which will be used for wakeup handling
because the interrupt parent for the wake IRQ is different from the regular
IRQ.

Signed-off-by: Gregory Fong <gregory.0xf0@...il.com>
---
New in v2.

 .../devicetree/bindings/gpio/brcm,brcmstb-gpio.txt | 26 +++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
index 435f1bc..568814f 100644
--- a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
@@ -33,6 +33,12 @@ Optional properties:
 - interrupt-parent:
     phandle of the parent interrupt controller
 
+- interrupts-extended:
+    Alternate form of specifying interrupts and parents that allows for
+    multiple parents.  This takes precedence over 'interrupts' and
+    'interrupt-parent'.  This probably must be used if the wakeup-source
+    property is provided because that may have a different interrupt parent.
+
 - #interrupt-cells:
     Should be <2>.  The first cell is the GPIO number, the second should specify
     flags.  The following subset of flags is supported:
@@ -48,7 +54,10 @@ Optional properties:
     Marks the device node as an interrupt controller
 
 - interrupt-names:
-    The name of the IRQ resource used by this controller
+    The names of the IRQ resources used by this controller
+
+- wakeup-source:
+    GPIOs for this controller can be used as a wakeup source
 
 Example:
 	upg_gio: gpio@...0a700 {
@@ -63,3 +72,18 @@ Example:
 		interrupt-names = "upg_gio";
 		brcm,gpio-bank-widths = <0x20 0x20 0x20 0x18>;
 	};
+
+	upg_gio_aon: gpio@...172c0 {
+		#gpio-cells = <0x2>;
+		#interrupt-cells = <0x2>;
+		compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
+		gpio-controller;
+		interrupt-controller;
+		reg = <0xf04172c0 0x40>;
+		interrupt-parent = <0xc>;
+		interrupts = <0x6>;
+		interrupts-extended = <0xc 0x6 0xa 0x5>;
+		interrupt-names = "upg_gio_aon", "upg_gio_aon_wakeup";
+		wakeup-source;
+		brcm,gpio-bank-widths = <0x12 0x4>;
+	};
-- 
1.9.1

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