EPSON-B184.dts

/dts-v1/;
/plugin/;

/ {
	compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun50i-a64", "allwinner,sun50i-h5";

	/*
	 * This fragment is needed only for the internal pull-up activation,
	 * external pull-up resistor is highly recommended if using long wires
	 *
	 * if you connect vcc to keyboard board, remote this fragment!
	 */

	fragment@0 {
		target = <&pio>;
		__overlay__ {
			gpio_button_0: gpio_button_0 {
				pins = "PE11","PE10","PE9", "PE8";
				function = "gpio_in";
				/* bias-pull-down; */
			};
		};
	};

	fragment@1 {
		target-path = "/";
		__overlay__ {
			EPSON-B184 {
				/*
				 * Use "gpio-keys" for EINT capable pins, "gpio-keys-polled" for other pins
				 * add "poll-interval" property if using "gpio-keys-polled"
				 */
/*
				compatible = "gpio-keys";
*/
				compatible = "gpio-keys-polled";
				poll-interval = <100>;
				autorepeat;

				pinctrl-names = "default";
				pinctrl-0 = <&gpio_button_0>;

				kp_1 {
					label = "Keypad 1";
					linux,code = <79>; /* KEY_KP1, see include/uapi/linux/input-event-codes.h */
					gpios = <&pio 4 11 0>; /* PE11 GPIO_ACTIVE_HIGH */
				};

				kp_2 {
					label = "Keypad 2";
					linux,code = <80>; /* KEY_KP2, see include/uapi/linux/input-event-codes.h */
					gpios = <&pio 4 10 0>; /* PE10 GPIO_ACTIVE_HIGH */
				};

				kp_3 {
					label = "Keypad 3";
					linux,code = <81>; /* KEY_KP3, see include/uapi/linux/input-event-codes.h */
					gpios = <&pio 4 9 0>; /* PE9 GPIO_ACTIVE_HIGH */
				};

				kp_0 {
					label = "Keypad 0";
					linux,code = <82>; /* KEY_KP0, see include/uapi/linux/input-event-codes.h */
					gpios = <&pio 4 8 0>; /* PE8 GPIO_ACTIVE_HIGH */
				};
			};
		};
	};
};