Qualcomm Power Management

modulename:  spm.ko

configname: CONFIG_QCOM_PM

Linux Kernel Configuration
└─>Device Drivers
└─>SOC (System On Chip) specific Drivers
└─>Qualcomm SoC drivers
└─>Qualcomm Power Management
In linux kernel since version 4.1 (release Date: 2015-06-21)  
QCOM Platform specific power driver to manage cores and L2 low power
modes. It interface with various system drivers to put the cores in
low power modes.

source code: