162306a36Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/regulator/richtek,rt4831-regulator.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: Richtek RT4831 Display Bias Voltage Regulator 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - ChiYuan Huang <cy_huang@richtek.com> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_cidescription: | 1362306a36Sopenharmony_ci RT4831 is a multifunctional device that can provide power to the LCD display 1462306a36Sopenharmony_ci and LCD backlight. 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci For Display Bias Voltage DSVP and DSVN, the output range is about 4V to 6.5V. 1762306a36Sopenharmony_ci It is sufficient to meet the current LCD power requirement. 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci DSVLCM is a boost regulator in IC internal as DSVP and DSVN input power. 2062306a36Sopenharmony_ci Its voltage should be configured above 0.15V to 0.2V gap larger than the 2162306a36Sopenharmony_ci voltage needed for DSVP and DSVN. Too much voltage gap could improve the 2262306a36Sopenharmony_ci voltage drop from the heavy loading scenario. But it also make the power 2362306a36Sopenharmony_ci efficiency worse. It's a trade-off. 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci Datasheet is available at 2662306a36Sopenharmony_ci https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_cipatternProperties: 2962306a36Sopenharmony_ci "^DSV(LCM|P|N)$": 3062306a36Sopenharmony_ci type: object 3162306a36Sopenharmony_ci $ref: regulator.yaml# 3262306a36Sopenharmony_ci unevaluatedProperties: false 3362306a36Sopenharmony_ci description: 3462306a36Sopenharmony_ci Properties for single Display Bias Voltage regulator. 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ciadditionalProperties: false 37