[PATCH 2/2] gpio: adnp: dt: Reference generic interrupt binding

[Thierry Reding <thierry.reding@avionic-design.de>]

Instead of having to duplicate the description of the properties needed
for interrupt support, reference the new standard document.

Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
---
This patch should go through LinusW's tree because it already carries
the patch that created this documentation.

 Documentation/devicetree/bindings/gpio/gpio-adnp.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-adnp.txt b/Documentation/devicetree/bindings/gpio/gpio-adnp.txt
index 5a09a21..625eee7 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-adnp.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-adnp.txt
@@ -11,6 +11,10 @@ Required properties:
 - gpio-controller: Marks the device as a GPIO controller
 - nr-gpios: The number of pins supported by the controller.
 
+The GPIO exander can optionally be used as an interrupt controller, in
+which case it uses the default two cell specifier as described in
+Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
+
 Example:
 
 	gpioext: gpio-controller@41 {
-- 
1.7.12