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diff --git a/Documentation/devicetree/bindings/input/gpio-keys-polled.txt b/Documentation/devicetree/bindings/input/gpio-keys-polled.txt
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+++ b/Documentation/devicetree/bindings/input/gpio-keys-polled.txt
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+Device-Tree bindings for input/gpio_keys_polled.c keyboard driver
+
+Required properties:
+        - compatible = "gpio-keys-polled";
+        - poll-interval: Poll interval time in milliseconds
+
+Optional properties:
+        - autorepeat: Boolean, Enable auto repeat feature of Linux input
+          subsystem.
+
+Each button (key) is represented as a sub-node of "gpio-keys-polled":
+Subnode properties:
+
+        - gpios: OF device-tree gpio specification.
+        - label: Descriptive name of the key.
+        - linux,code: Keycode to emit.
+
+Optional subnode-properties:
+        - linux,input-type: Specify event type this button/key generates.
+          If not specified defaults to <1> == EV_KEY.
+        - debounce-interval: Debouncing interval time in milliseconds.
+          If not specified defaults to 5.
+        - gpio-key,wakeup: Boolean, button can wake-up the system.
+
+Example nodes:
+
+        gpio_keys_polled {
+                        compatible = "gpio-keys-polled";
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+                        poll-interval = <100>;
+                        autorepeat;
+                        button@21 {
+                                label = "GPIO Key UP";
+                                linux,code = <103>;
+                                gpios = <&gpio1 0 1>;
+                        };
+                        ...