IIO_EVENT_CODE     60 include/linux/iio/events.h 	IIO_EVENT_CODE(chan_type, 0, modifier, direction, type, number, 0, 0)
IIO_EVENT_CODE     71 include/linux/iio/events.h 	IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)