linux/Documentation/ABI/testing/sysfs-bus-iio-proximity-as3935

What:		/sys/bus/iio/devices/iio:deviceX/in_proximity_input
Date:		March 2014
KernelVersion:	3.15
Contact:	Matt Ranostay <[email protected]>
Description:
		Get the current distance in meters of storm (1km steps)
		1000-40000 = distance in meters

What		/sys/bus/iio/devices/iio:deviceX/noise_level_tripped
Date:		May 2017
KernelVersion:	4.13
Contact:	Matt Ranostay <[email protected]>
Description:
		When 1 the noise level is over the trip level and not reporting
		valid data