Based on kernel version 3.15.4. Page generated on 2014-07-07 09:00 EST.
1 Device-Tree bindings for input/gpio_keys.c keyboard driver 2 3 Required properties: 4 - compatible = "gpio-keys"; 5 6 Optional properties: 7 - autorepeat: Boolean, Enable auto repeat feature of Linux input 8 subsystem. 9 10 Each button (key) is represented as a sub-node of "gpio-keys": 11 Subnode properties: 12 13 - gpios: OF device-tree gpio specification. 14 - label: Descriptive name of the key. 15 - linux,code: Keycode to emit. 16 17 Optional subnode-properties: 18 - linux,input-type: Specify event type this button/key generates. 19 If not specified defaults to <1> == EV_KEY. 20 - debounce-interval: Debouncing interval time in milliseconds. 21 If not specified defaults to 5. 22 - gpio-key,wakeup: Boolean, button can wake-up the system. 23 24 Example nodes: 25 26 gpio_keys { 27 compatible = "gpio-keys"; 28 #address-cells = <1>; 29 #size-cells = <0>; 30 autorepeat; 31 button@21 { 32 label = "GPIO Key UP"; 33 linux,code = <103>; 34 gpios = <&gpio1 0 1>; 35 }; 36 ...