SYSFS trigger

modulename: iio-trig-sysfs.ko

configname: CONFIG_IIO_SYSFS_TRIGGER

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>IIO staging drivers
└─>SYSFS trigger
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Provides support for using SYSFS entry as IIO triggers.
If unsure, say N (but it's safe to say "Y").

To compile this driver as a module, choose M here: the
module will be called iio-trig-sysfs.

source code:
selects

CONFIG_IRQ_WORK