162306a36Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: Richtek RT4831 Backlight 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - ChiYuan Huang <cy_huang@richtek.com> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_cidescription: | 1362306a36Sopenharmony_ci RT4831 is a mutifunctional device that can provide power to the LCD display 1462306a36Sopenharmony_ci and LCD backlight. 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci For the LCD backlight, it can provide four channel WLED driving capability. 1762306a36Sopenharmony_ci Each channel driving current is up to 30mA 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci Datasheet is available at 2062306a36Sopenharmony_ci https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ciallOf: 2362306a36Sopenharmony_ci - $ref: common.yaml# 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ciproperties: 2662306a36Sopenharmony_ci compatible: 2762306a36Sopenharmony_ci const: richtek,rt4831-backlight 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci default-brightness: 3062306a36Sopenharmony_ci minimum: 0 3162306a36Sopenharmony_ci maximum: 2048 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci max-brightness: 3462306a36Sopenharmony_ci minimum: 0 3562306a36Sopenharmony_ci maximum: 2048 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci richtek,pwm-enable: 3862306a36Sopenharmony_ci description: | 3962306a36Sopenharmony_ci Specify the backlight dimming following by PWM duty or by SW control. 4062306a36Sopenharmony_ci type: boolean 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci richtek,bled-ovp-sel: 4362306a36Sopenharmony_ci description: | 4462306a36Sopenharmony_ci Backlight OVP level selection, currently support 17V/21V/25V/29V. 4562306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint8 4662306a36Sopenharmony_ci default: 1 4762306a36Sopenharmony_ci minimum: 0 4862306a36Sopenharmony_ci maximum: 3 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ci richtek,bled-ocp-microamp: 5162306a36Sopenharmony_ci description: | 5262306a36Sopenharmony_ci Backlight over current protection level. 5362306a36Sopenharmony_ci enum: [900000, 1200000, 1500000, 1800000] 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ci richtek,channel-use: 5662306a36Sopenharmony_ci description: | 5762306a36Sopenharmony_ci Backlight LED channel to be used. 5862306a36Sopenharmony_ci BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable. 5962306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint8 6062306a36Sopenharmony_ci minimum: 1 6162306a36Sopenharmony_ci maximum: 15 6262306a36Sopenharmony_ci 6362306a36Sopenharmony_cirequired: 6462306a36Sopenharmony_ci - compatible 6562306a36Sopenharmony_ci - richtek,channel-use 6662306a36Sopenharmony_ci 6762306a36Sopenharmony_ciadditionalProperties: false 68