bindings/input/gpio-matrix-keypad.txt

1 * GPIO driven matrix keypad device tree bindings
3 GPIO driven matrix keypad is used to interface a SoC with a matrix keypad.
6 keypad can sense a key-press and key-release by means of GPIO lines and
7 report the event using GPIO interrupts to the cpu.
10 - compatible:		Should be "gpio-matrix-keypad"
11 - row-gpios:		List of gpios used as row lines. The gpio specifier
12 			for this property depends on the gpio controller to
14 - col-gpios:		List of gpios used as column lines. The gpio specifier
15 			for this property depends on the gpio controller to
17 - linux,keymap:		The definition can be found at
18 			bindings/input/matrix-keymap.txt
21 - linux,no-autorepeat:	do no enable autorepeat feature.
22 - wakeup-source:	use any event on keypad as wakeup event.
24 - debounce-delay-ms:	debounce interval in milliseconds
25 - col-scan-delay-us:	delay, measured in microseconds, that is needed
26 			before we can scan keypad after activating column gpio
27 - drive-inactive-cols:	drive inactive columns during scan,
31 	matrix-keypad {
32 		compatible = "gpio-matrix-keypad";
33 		debounce-delay-ms = <5>;
34 		col-scan-delay-us = <2>;
36 		row-gpios = <&gpio2 25 0
40 		col-gpios = <&gpio2 21 0
43 		linux,keymap = <0x0000008B