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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Richtek RT4831 Backlight
maintainers:
- ChiYuan Huang <cy_huang@richtek.com>
description: |
RT4831 is a mutifunctional device that can provide power to the LCD display
and LCD backlight.
For the LCD backlight, it can provide four channel WLED driving capability.
Each channel driving current is up to 30mA
Datasheet is available at
https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
allOf:
- $ref: common.yaml#
properties:
compatible:
const: richtek,rt4831-backlight
default-brightness:
minimum: 0
maximum: 2048
max-brightness:
minimum: 0
maximum: 2048
richtek,pwm-enable:
description: |
Specify the backlight dimming following by PWM duty or by SW control.
type: boolean
richtek,bled-ovp-sel:
description: |
Backlight OVP level selection, currently support 17V/21V/25V/29V.
$ref: /schemas/types.yaml#/definitions/uint8
default: 1
minimum: 0
maximum: 3
richtek,bled-ocp-microamp:
description: |
Backlight over current protection level.
enum: [900000, 1200000, 1500000, 1800000]
richtek,channel-use:
description: |
Backlight LED channel to be used.
BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable.
$ref: /schemas/types.yaml#/definitions/uint8
minimum: 1
maximum: 15
required:
- compatible
- richtek,channel-use
additionalProperties: false
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