Qualcomm Resource Power Manager (RPM)

modulename: qcom_rpm.ko

configname: CONFIG_MFD_QCOM_RPM

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>Device Tree and Open Firmware support
└─>Qualcomm Resource Power Manager (RPM)
In linux kernel since version 4 (release Date: 2015-04-12)  
If you say yes to this option, support will be included for the
Resource Power Manager system found in the Qualcomm 8660, 8960 and
8064 based devices.

This is required to access many regulators, clocks and bus
frequencies controlled by the RPM on these devices.

Say M here if you want to include support for the Qualcomm RPM as a
module. This will build a module called "qcom_rpm".

source code: