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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Richtek RT4831 Backlight8 9maintainers:10 - ChiYuan Huang <cy_huang@richtek.com>11 12description: |13 RT4831 is a mutifunctional device that can provide power to the LCD display14 and LCD backlight.15 16 For the LCD backlight, it can provide four channel WLED driving capability.17 Each channel driving current is up to 30mA18 19 Datasheet is available at20 https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf21 22allOf:23 - $ref: common.yaml#24 25properties:26 compatible:27 const: richtek,rt4831-backlight28 29 default-brightness:30 minimum: 031 maximum: 204832 33 max-brightness:34 minimum: 035 maximum: 204836 37 richtek,pwm-enable:38 description: |39 Specify the backlight dimming following by PWM duty or by SW control.40 type: boolean41 42 richtek,bled-ovp-sel:43 description: |44 Backlight OVP level selection, currently support 17V/21V/25V/29V.45 $ref: /schemas/types.yaml#/definitions/uint846 default: 147 minimum: 048 maximum: 349 50 richtek,bled-ocp-microamp:51 description: |52 Backlight over current protection level.53 enum: [900000, 1200000, 1500000, 1800000]54 55 richtek,channel-use:56 description: |57 Backlight LED channel to be used.58 BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable.59 $ref: /schemas/types.yaml#/definitions/uint860 minimum: 161 maximum: 1562 63required:64 - compatible65 - richtek,channel-use66 67additionalProperties: false68