1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Richtek RT4831 Backlight 8 9maintainers: 10 - ChiYuan Huang <cy_huang@richtek.com> 11 12description: | 13 RT4831 is a mutifunctional device that can provide power to the LCD display 14 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 30mA 18 19 Datasheet is available at 20 https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf 21 22allOf: 23 - $ref: common.yaml# 24 25properties: 26 compatible: 27 const: richtek,rt4831-backlight 28 29 default-brightness: 30 minimum: 0 31 maximum: 2048 32 33 max-brightness: 34 minimum: 0 35 maximum: 2048 36 37 richtek,pwm-enable: 38 description: | 39 Specify the backlight dimming following by PWM duty or by SW control. 40 type: boolean 41 42 richtek,bled-ovp-sel: 43 description: | 44 Backlight OVP level selection, currently support 17V/21V/25V/29V. 45 $ref: /schemas/types.yaml#/definitions/uint8 46 default: 1 47 minimum: 0 48 maximum: 3 49 50 richtek,channel-use: 51 description: | 52 Backlight LED channel to be used. 53 BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable. 54 $ref: /schemas/types.yaml#/definitions/uint8 55 minimum: 1 56 maximum: 15 57 58required: 59 - compatible 60 - richtek,channel-use 61 62additionalProperties: false 63