STMicroelectronics STM32 PWR

modulename: stm32-pwr.ko

configname: CONFIG_REGULATOR_STM32_PWR

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>STMicroelectronics STM32 PWR
In linux kernel since version 5.1 (release Date: 2019-05-05)  
This driver supports internal regulators (1V1, 1V8, 3V3) in the
STMicroelectronics STM32 chips.

source code:
drivers/regulator/stm32-pwr.c
depends
CONFIG_REGULATOR
CONFIG_ARCH_STM32 or CONFIG_COMPILE_TEST