bindings/input/rockchip-keys.txt

2 ------------------------------------
5  - compatible: "rockchip,key"
6  - io-channels: Phandle to an ADC channel
8 Each button (key) is represented as a sub-node of "rockchip,key":
10 Required subnode-properties:
11 	- label: Descriptive name of the key.
12 	- linux,code: Keycode to emit.
13 	- rockchip,adc_value:: Voltage ADC input when this key is pressed.
17 #include <dt-bindings/input/input.h>
19 	rk_key: rockchip-key {
20 		compatible = "rockchip,key";
23 		io-channels = <&saradc 1>;
25 		vol-up-key {
26 			linux,code = <115>;
31 		vol-down-key {
32 			linux,code = <114>;
37 		power-key {
39 			linux,code = <116>;
40 			pinctrl-names = "default";
41 			pinctrl-0 = <&pwrbtn>;
43 			gpio-key,wakeup;
46 		menu-key {
47 			linux,code = <59>;
52 		home-key {
53 			linux,code = <102>;
58 		back-key {
59 			linux,code = <158>;
64 		camera-key {
65 			linux,code = <212>;