Richtek RT4801 Regulators

modulename: rt4801-regulator.ko

configname: CONFIG_REGULATOR_RT4801

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>Richtek RT4801 Regulators
In linux kernel since version 5.1 (release Date: 2019-05-05)  
This adds support for voltage regulators in Richtek RT4801 Display Bias IC.
The device supports two regulators (DSVP/DSVN).

source code:
drivers/regulator/rt4801-regulator.c