| # 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 bindings |
| |
| 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>; |
| }; |
| |
| ... |
