Qualcomm RPM Power domain driver

modulename: rpmpd.ko

configname: CONFIG_QCOM_RPMPD

Linux Kernel Configuration
└─>Device Drivers
└─>PM Domains
└─>Qualcomm PM Domains
└─>Device Tree and Open Firmware support
└─>Qualcomm RPM Power domain driver
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
QCOM RPM Power domain driver to support power-domains with
performance states. The driver communicates a performance state
value to RPM which then translates it into corresponding voltage
for the voltage rail.

source code: