Each button (key) is represented as a sub-node of "gpio-keys":
Subnode properties:
- - gpios: OF device-tree gpio specification.
- label: Descriptive name of the key.
- linux,code: Keycode to emit.
+Required mutual exclusive subnode-properties:
+ - gpios: OF device-tree gpio specification.
+ - interrupts: the interrupt line for that input
+
Optional subnode-properties:
- linux,input-type: Specify event type this button/key generates.
If not specified defaults to <1> == EV_KEY.
linux,code = <103>;
gpios = <&gpio1 0 1>;
};
+ button@22 {
+ label = "GPIO Key DOWN";
+ linux,code = <108>;
+ interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
+ };
...