X-Powers AXP288 Fuel Gauge

modulename: axp288_fuel_gauge.ko

configname: CONFIG_AXP288_FUEL_GAUGE

Linux Kernel Configuration
└─>Device Drivers
└─>Power supply class support
└─>X-Powers AXP288 Fuel Gauge
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say yes here to have support for X-Power power management IC (PMIC)
Fuel Gauge. The device provides battery statistics and status
monitoring as well as alerts for battery over/under voltage and
over/under temperature.

source code:
drivers/power/supply/axp288_fuel_gauge.c