Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / input / gpio-keys-polled.txt

diff --git a/kernel/Documentation/devicetree/bindings/input/gpio-keys-polled.txt b/kernel/Documentation/devicetree/bindings/input/gpio-keys-polled.txt
new file mode 100644 (file)
index 0000000..313abef
--- /dev/null
+++ b/kernel/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>;
+                       };
+                       ...