CPCAP OnKey

modulename: cpcap-pwrbutton.ko

configname: CONFIG_INPUT_CPCAP_PWRBUTTON

Linux Kernel Configuration
└─>Device Drivers
└─>Input device support
└─>Miscellaneous devices
└─>CPCAP OnKey
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y here if you want to enable power key reporting via the
Motorola CPCAP chip.

To compile this driver as a module, choose M here. The module will
be called cpcap-pwrbutton.

source code: