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# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: led-backlight
maintainers:
- Lee Jones <lee@kernel.org>
- Daniel Thompson <daniel.thompson@linaro.org>
- Jingoo Han <jingoohan1@gmail.com>
description:
This binding is used to describe a basic backlight device made of LEDs. It
can also be used to describe a backlight device controlled by the output of
a LED driver.
properties:
compatible:
const: led-backlight
leds:
description: A list of LED nodes
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
maxItems: 1
brightness-levels:
description:
Array of distinct brightness levels. The levels must be in the range
accepted by the underlying LED devices. This is used to translate a
backlight brightness level into a LED brightness level. If it is not
provided, the identity mapping is used.
$ref: /schemas/types.yaml#/definitions/uint32-array
default-brightness-level:
description:
The default brightness level (index into the array defined by the
"brightness-levels" property).
$ref: /schemas/types.yaml#/definitions/uint32
required:
- compatible
- leds
additionalProperties: false
examples:
- |
backlight {
compatible = "led-backlight";
leds = <&led1>, <&led2>;
brightness-levels = <0 4 8 16 32 64 128 255>;
default-brightness-level = <6>;
};
...
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