Where:		/sys/bus/zio/devices/<zdev>/
		/sys/bus/zio/devices/<zdev>/<cset>/
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	These are collections of attributes of the ZIO device
		hierarchy. Each collection contains both: standard
		attributes (described later) and extended attributes
		defined by each driver (not described in this document).
		A standard attribute can appear *only* one time in the
		device hierarchy (e.g. The attribute X can be in a <cset>,
		but it cannot be, at the same time, in a <chan> or a <zdev>
		level). In this documentation we indicate each attribute
		at all level, but remember that it can be available only
		in one level. If an attribute appears only on a single
		level it means that it can leave only there.
		Attributes that live in an high level automatically apply
		the configuration on all lower levels.

		This collection refers to a single instance of a device.
		Each driver can decide to support or not the standard
		attributes; if it supports the standard attributes it works
		as described in this document.

		Note: The permission on the standard attributes depend on
		the driver implementation
Users:


Where:		/sys/bus/zio/devices/<zdev>/version
		/sys/bus/zio/devices/<zdev>/<cset>/version
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/version
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	This attribute define the version of the collection of
		attributes that a device driver exports. A
		collection can change during the time. This attribute allow
		an user-space program to recognize if it can work with a
		particular version or not
Users:


Where:		/sys/bus/zio/devices/<zdev>/gain_factor
		/sys/bus/zio/devices/<zdev>/<cset>/gain_factor
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/gain_factor
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	This attribute define the gain factor of an I/O signal.
Users:


Where:		/sys/bus/zio/devices/<zdev>/offset
		/sys/bus/zio/devices/<zdev>/<cset>/offset
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/offset
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	This attribute define the offset to apply on an I/O
		signal.
Users:


Where:		/sys/bus/zio/devices/<zdev>/resolution-bits
		/sys/bus/zio/devices/<zdev>/<cset>/resolution-bits
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/resolution-bits
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	This attribute define the resolution bit of a digitalized
		I/O signal.
Users:


Where:		/sys/bus/zio/devices/<zdev>/max-sample-rate
		/sys/bus/zio/devices/<zdev>/<cset>/max-sample-rate
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/max-sample-rate
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	This attribute define the maximum sample rate of the I/O
		signal.
Users:


Where:		/sys/bus/zio/devices/<zdev>/vref-src
		/sys/bus/zio/devices/<zdev>/<cset>/vref-src
		/sys/bus/zio/devices/<zdev>/<cset>/<chan>/vref-src
Date:		April 2013
Kernel Version:	3.x
Contact:	zio@ohwr.org (mailing list)
Description:	This attribute define the Volt reference source for the I/O
		signal.
Users:
