xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/input/mediatek,mt6779-keypad.yaml

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/mediatek,mt6779-keypad.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Mediatek's Keypad Controller

maintainers:
  - Mattijs Korpershoek <mkorpershoek@baylibre.com>

allOf:
  - $ref: /schemas/input/matrix-keymap.yaml#

description: |
  Mediatek's Keypad controller is used to interface a SoC with a matrix-type
  keypad device. The keypad controller supports multiple row and column lines.
  A key can be placed at each intersection of a unique row and a unique column.
  The keypad controller can sense a key-press and key-release and report the
  event using a interrupt to the cpu.

properties:
  compatible:
    oneOf:
      - const: mediatek,mt6779-keypad
      - items:
          - enum:
              - mediatek,mt6873-keypad
          - const: mediatek,mt6779-keypad

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1

  clock-names:
    items:
      - const: kpd

  wakeup-source:
    description: use any event on keypad as wakeup event
    type: boolean

  debounce-delay-ms:
    maximum: 256
    default: 16

  mediatek,keys-per-group:
    description: each (row, column) group has multiple keys
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 1
    maximum: 2

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/input/input.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    soc {
        #address-cells = <2>;
        #size-cells = <2>;

        keyboard@10010000 {
          compatible = "mediatek,mt6779-keypad";
          reg = <0 0x10010000 0 0x1000>;
          interrupts = <GIC_SPI 75 IRQ_TYPE_EDGE_FALLING>;
          clocks = <&clk26m>;
          clock-names = "kpd";
        };
    };