1What: /sys/class/mei/ 2Date: May 2014 3KernelVersion: 3.17 4Contact: Tomas Winkler <tomas.winkler@intel.com> 5Description: 6 The mei/ class sub-directory belongs to mei device class 7 8 9What: /sys/class/mei/meiN/ 10Date: May 2014 11KernelVersion: 3.17 12Contact: Tomas Winkler <tomas.winkler@intel.com> 13Description: 14 The /sys/class/mei/meiN directory is created for 15 each probed mei device 16 17What: /sys/class/mei/meiN/fw_status 18Date: Nov 2014 19KernelVersion: 3.19 20Contact: Tomas Winkler <tomas.winkler@intel.com> 21Description: Display fw status registers content 22 23 The ME FW writes its status information into fw status 24 registers for BIOS and OS to monitor fw health. 25 26 The register contains running state, power management 27 state, error codes, and others. The way the registers 28 are decoded depends on PCH or SoC generation. 29 Also number of registers varies between 1 and 6 30 depending on generation. 31 32