xref: /openbmc/linux/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml (revision 4b79ec9a)

# 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>;
    };