Here we apply required documentation for the Rohm BU21013 Touch
Screen driver which describe available properties and how to use
them.

Cc: Dmitry Torokhov <dmitry.torok...@gmail.com>
Cc: linux-in...@vger.kernel.org
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
---
 .../bindings/input/touchscreen/bu21013.txt         |   28 ++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 
Documentation/devicetree/bindings/input/touchscreen/bu21013.txt

diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt 
b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt
new file mode 100644
index 0000000..51edc75
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt
@@ -0,0 +1,28 @@
+* Rohm BU21013 Touch Screen
+
+Required properties:
+ - compatible           : "stericsson,bu21013_tp"
+ - reg                  :  I2C device address
+
+Optional properties:
+touch-gpio              : GPIO pin registering a touch event
+<supply_name>-supply   : Phandle to a regulator supply
+stericsson,touch-max-x         : Maximum outward permitted limit in the X axis
+stericsson,touch-max-y : Maximum outward permitted limit in the Y axis
+stericsson,flip-x      : Flip touch coordinates on the X axis
+stericsson,flip-y      : Flip touch coordinates on the Y axis
+
+Example:
+
+       i2c@80110000 {
+               bu21013_tp@0x5c {
+                       compatible = "bu21013_tp";
+                       reg = <0x5c>;
+                       touch-gpio = <&gpio2 20 0x4>;
+                       avdd-supply = <&ab8500_ldo_aux1_reg>;
+
+                       stericsson,touch-max-x = <384>;
+                       stericsson,touch-max-y = <704>;
+                       stricsson,flip-y;
+               };
+       };
-- 
1.7.9.5

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