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
7 title: Common backlight properties
8
9 maintainers:
10 - Lee Jones <lee@kernel.org>
11 - Daniel Thompson <daniel.thompson@linaro.org>
12 - Jingoo Han <jingoohan1@gmail.com>
13
14 description:
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
19 properties:
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
36 additionalProperties: true
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