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+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: September 2017
+KernelVersion: 4.14
+Contact: linux-iio@vger.kernel.org
+Description:
+ This attribute is exposed by the CrOS EC sensors 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.