HiSilicon Hi6421 PMIC voltage regulator support

modulename: hi6421-regulator.ko

configname: CONFIG_REGULATOR_HI6421

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>Device Tree and Open Firmware support
└─>HiSilicon Hi6421 PMIC voltage regulator support
In linux kernel since version 3.18 (release Date: 2014-12-07)  
This driver provides support for the voltage regulators on the
HiSilicon Hi6421 PMU / Codec IC.
Hi6421 is a multi-function device which, on regulator part, provides
21 general purpose LDOs, 3 dedicated LDOs, and 5 BUCKs. All
of them come with support to either ECO (idle) or sleep mode.

source code: