1# SPDX-License-Identifier: GPL-2.0-only 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: led-backlight bindings 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 This binding is used to describe a basic backlight device made of LEDs. It 16 can also be used to describe a backlight device controlled by the output of 17 a LED driver. 18 19properties: 20 compatible: 21 const: led-backlight 22 23 leds: 24 description: A list of LED nodes 25 $ref: /schemas/types.yaml#/definitions/phandle-array 26 27 brightness-levels: 28 description: 29 Array of distinct brightness levels. The levels must be in the range 30 accepted by the underlying LED devices. This is used to translate a 31 backlight brightness level into a LED brightness level. If it is not 32 provided, the identity mapping is used. 33 $ref: /schemas/types.yaml#/definitions/uint32-array 34 35 default-brightness-level: 36 description: 37 The default brightness level (index into the array defined by the 38 "brightness-levels" property). 39 $ref: /schemas/types.yaml#/definitions/uint32 40 41required: 42 - compatible 43 - leds 44 45additionalProperties: false 46 47examples: 48 - | 49 backlight { 50 compatible = "led-backlight"; 51 52 leds = <&led1>, <&led2>; 53 brightness-levels = <0 4 8 16 32 64 128 255>; 54 default-brightness-level = <6>; 55 }; 56 57... 58