Documentation/devicetree/bindings/input/gpio-keys-polled.txt

   1 Device-Tree bindings for input/gpio_keys_polled.c keyboard driver
   2
   3 Required properties:
   4         - compatible = "gpio-keys-polled";
   5         - poll-interval: Poll interval time in milliseconds
   6
   7 Optional properties:
   8         - autorepeat: Boolean, Enable auto repeat feature of Linux input
   9           subsystem.
  10
  11 Each button (key) is represented as a sub-node of "gpio-keys-polled":
  12 Subnode properties:
  13
  14         - gpios: OF device-tree gpio specification.
  15         - label: Descriptive name of the key.
  16         - linux,code: Keycode to emit.
  17
  18 Optional subnode-properties:
  19         - linux,input-type: Specify event type this button/key generates.
  20           If not specified defaults to <1> == EV_KEY.
  21         - debounce-interval: Debouncing interval time in milliseconds.
  22           If not specified defaults to 5.
  23         - gpio-key,wakeup: Boolean, button can wake-up the system.
  24
  25 Example nodes:
  26
  27         gpio_keys_polled {
  28                         compatible = "gpio-keys-polled";
  29                         #address-cells = <1>;
  30                         #size-cells = <0>;
  31                         poll-interval = <100>;
  32                         autorepeat;
  33                         button@21 {
  34                                 label = "GPIO Key UP";
  35                                 linux,code = <103>;
  36                                 gpios = <&gpio1 0 1>;
  37                         };
  38                         ...