Samsung built-in ADC

modulename: s3c-hwmon.ko

configname: CONFIG_SENSORS_S3C

Linux Kernel Configuration
└─>Device Drivers
└─>Hardware Monitoring support
└─>Samsung built-in ADC
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
If you say yes here you get support for the on-board ADCs of
the Samsung S3C24XX, S3C64XX and other series of SoC

This driver can also be built as a module. If so, the module
will be called s3c-hwmon.

source code: