bindings/input/gpio-matrix-keypad.yaml

1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $id: http://devicetree.org/schemas/input/gpio-matrix-keypad.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: GPIO matrix keypad
11   - Marek Vasut <marek.vasut@gmail.com>
14   GPIO driven matrix keypad is used to interface a SoC with a matrix keypad.
17   keypad can sense a key-press and key-release by means of GPIO lines and
18   report the event using GPIO interrupts to the cpu.
21   - $ref: /schemas/input/matrix-keymap.yaml#
25     const: gpio-matrix-keypad
27   row-gpios:
29       List of GPIOs used as row lines. The gpio specifier for this property
30       depends on the gpio controller to which these row lines are connected.
32   col-gpios:
34       List of GPIOs used as column lines. The gpio specifier for this property
35       depends on the gpio controller to which these column lines are connected.
39   linux,no-autorepeat:
43   gpio-activelow:
46       Force GPIO polarity to active low.
49   debounce-delay-ms:
53   col-scan-delay-us:
55       Delay, measured in microseconds, that is needed
56       before we can scan keypad after activating column gpio.
59   all-cols-on-delay-us:
61       Delay, measured in microseconds, that is needed
65   drive-inactive-cols:
71   wakeup-source: true
74   - compatible
75   - row-gpios
76   - col-gpios
77   - linux,keymap
82   - |
83     matrix-keypad {
84         compatible = "gpio-matrix-keypad";
85         debounce-delay-ms = <5>;
86         col-scan-delay-us = <2>;
88         row-gpios = <&gpio2 25 0
92         col-gpios = <&gpio2 21 0
102         wakeup-source;