xref: /linux/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml (revision 8be98d2f2a0a262f8bf8a0bc1fdf522b3c7aab17)

# 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 <linus.walleij@linaro.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>;
    };