[PATCH 2/2] Input: atmel_mxt_ts - Add keycodes array example

[Javier Martinez Canillas <javier.martinez@collabora.co.uk>]

The Atmel maXTouch driver allows to dynamically define the
event keycodes set that the device is capable of. This may
not be evident when reading the DT binding document so add
an example to make it easier to understand how this works.

Also, the current documentation says that the array limit
is four entries but the driver dynamically allocates the
keymap array and does not limit the array size.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
---
 Documentation/devicetree/bindings/input/atmel,maxtouch.txt | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
index baef432..be50476 100644
--- a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
+++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
@@ -11,7 +11,7 @@ Required properties:
 
 Optional properties for main touchpad device:
 
-- linux,gpio-keymap: An array of up to 4 entries indicating the Linux
+- linux,gpio-keymap: An array of entries indicating the Linux
     keycode generated by each GPIO. Linux keycodes are defined in
     <dt-bindings/input/input.h>.
 
@@ -22,4 +22,10 @@ Example:
 		reg = <0x4b>;
 		interrupt-parent = <&gpio>;
 		interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;
+		linux,gpio-keymap = < BTN_LEFT
+				      BTN_TOOL_FINGER
+				      BTN_TOOL_DOUBLETAP
+				      BTN_TOOL_TRIPLETAP
+				      BTN_TOOL_QUADTAP
+				      BTN_TOOL_QUINTTAP >;
 	};
-- 
2.0.0.rc2