Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
Extension
.yaml
Size
1191 bytes
Lines
50
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.

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Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Kinetic Technologies KTD253 and KTD259 one-wire backlight

maintainers:
  - Linus Walleij <linusw@kernel.org>

description: |
  The Kinetic Technologies KTD253 and KTD259 are white LED backlights
  controlled by a single GPIO line. If you just turn on the backlight
  it goes to maximum backlight then you can set the level of backlight
  using pulses on the enable wire. This is sometimes referred to as
  "expresswire".

allOf:
  - $ref: common.yaml#

properties:
  compatible:
    items:
      - enum:
          - kinetic,ktd253
          - kinetic,ktd259

  enable-gpios:
    description: GPIO to use to enable/disable and dim the backlight.
    maxItems: 1

  default-brightness: true
  max-brightness: true

required:
  - compatible
  - enable-gpios

additionalProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    backlight {
        compatible = "kinetic,ktd253";
        enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
        default-brightness = <13>;
    };

Annotation

Implementation Notes