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+Where: /sys/bus/i2c/devices/.../heading0_input
+Date: April 2010
+Kernel Version: 2.6.36?
+Contact: alan.cox@intel.com
+Description: Reports the current heading from the compass as a floating
+ point value in degrees.
+
+Where: /sys/bus/i2c/devices/.../power_state
+Date: April 2010
+Kernel Version: 2.6.36?
+Contact: alan.cox@intel.com
+Description: Sets the power state of the device. 0 sets the device into
+ sleep mode, 1 wakes it up.
+
+Where: /sys/bus/i2c/devices/.../calibration
+Date: April 2010
+Kernel Version: 2.6.36?
+Contact: alan.cox@intel.com
+Description: Sets the calibration on or off (1 = on, 0 = off). See the
+ chip data sheet.
+