Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml
Extension
.yaml
Size
2278 bytes
Lines
87
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/cirrus,ep9307-keypad.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Cirrus ep93xx keypad

maintainers:
  - Alexander Sverdlin <alexander.sverdlin@gmail.com>

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

description:
  The KPP is designed to interface with a keypad matrix with 2-point contact
  or 3-point contact keys. The KPP is designed to simplify the software task
  of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
  and decoding one or multiple keys pressed simultaneously on a keypad.

properties:
  compatible:
    oneOf:
      - const: cirrus,ep9307-keypad
      - items:
          - enum:
              - cirrus,ep9312-keypad
              - cirrus,ep9315-keypad
          - const: cirrus,ep9307-keypad

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1

  # Time for state change interrupt to trigger
  debounce-delay-ms: true

  cirrus,prescale:
    description: row/column counter pre-scaler load value
    $ref: /schemas/types.yaml#/definitions/uint16
    maximum: 1023

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - linux,keymap

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/input/input.h>
    #include <dt-bindings/clock/cirrus,ep9301-syscon.h>
    keypad@800f0000 {
        compatible = "cirrus,ep9307-keypad";
        reg = <0x800f0000 0x0c>;
        interrupt-parent = <&vic0>;
        interrupts = <29>;
        clocks = <&eclk EP93XX_CLK_KEYPAD>;
        pinctrl-names = "default";
        pinctrl-0 = <&keypad_default_pins>;
        linux,keymap = <KEY_UP>,

Annotation

Implementation Notes