Enable software IIO device support

modulename: industrialio-sw-device.ko

configname: CONFIG_IIO_SW_DEVICE

Linux Kernel Configuration
└─>Device Drivers
└─>Industrial I/O support
└─>Enable software IIO device support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Provides IIO core support for software devices. A software
device can be created via configfs or directly by a driver
using the API provided.

source code: