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+What: /sys/class/mei/
+Date: May 2014
+KernelVersion: 3.17
+Contact: Tomas Winkler <tomas.winkler@intel.com>
+Description:
+ The mei/ class sub-directory belongs to mei device class
+
+
+What: /sys/class/mei/meiN/
+Date: May 2014
+KernelVersion: 3.17
+Contact: Tomas Winkler <tomas.winkler@intel.com>
+Description:
+ The /sys/class/mei/meiN directory is created for
+ each probed mei device
+
+What: /sys/class/mei/meiN/fw_status
+Date: Nov 2014
+KernelVersion: 3.19
+Contact: Tomas Winkler <tomas.winkler@intel.com>
+Description: Display fw status registers content
+
+ The ME FW writes its status information into fw status
+ registers for BIOS and OS to monitor fw health.
+
+ The register contains running state, power management
+ state, error codes, and others. The way the registers
+ are decoded depends on PCH or SoC generation.
+ Also number of registers varies between 1 and 6
+ depending on generation.
+