1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/leds/backlight/common.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Common backlight properties
8
9maintainers:
10  - Lee Jones <lee.jones@linaro.org>
11  - Daniel Thompson <daniel.thompson@linaro.org>
12  - Jingoo Han <jingoohan1@gmail.com>
13
14description:
15  Backlight devices provide backlight for different types of graphical
16  displays. They are typically but not necessarily implemented using a white
17  LED powered by a boost converter.
18
19properties:
20  default-brightness:
21    description:
22      The default brightness that should be applied to the LED by the operating
23      system on start-up. The brightness should not exceed the brightness the
24      LED can provide.
25    $ref: /schemas/types.yaml#/definitions/uint32
26
27  max-brightness:
28    description:
29      Normally the maximum brightness is determined by the hardware and this
30      property is not required. This property is used to put a software limit
31      on the brightness apart from what the driver says, as it could happen
32      that a LED can be made so bright that it gets damaged or causes damage
33      due to restrictions in a specific system, such as mounting conditions.
34    $ref: /schemas/types.yaml#/definitions/uint32
35
36additionalProperties: true
37