What:		/sys/bus/iio/devices/iio:deviceX/calibrate
Date:		July 2015
KernelVersion:	4.7
Contact:	linux-iio@vger.kernel.org
Description:
		Writing '1' will perform a FOC (Fast Online Calibration). The
                corresponding calibration offsets can be read from *_calibbias
                entries.

What:		/sys/bus/iio/devices/iio:deviceX/location
Date:		July 2015
KernelVersion:	4.7
Contact:	linux-iio@vger.kernel.org
Description:
		This attribute returns a string with the physical location where
                the motion sensor is placed. For example, in a laptop a motion
                sensor can be located on the base or on the lid. Current valid
		values are 'base' and 'lid'.

What:		/sys/bus/iio/devices/iio:deviceX/id
Date:		Septembre 2017
KernelVersion:	4.14
Contact:	linux-iio@vger.kernel.org
Description:
		This attribute is exposed by the CrOS EC legacy accelerometer
		driver and represents the sensor ID as exposed by the EC. This
		ID is used by the Android sensor service hardware abstraction
		layer (sensor HAL) through the Android container on ChromeOS.