centos man page for enum_cfg80211_signal_type

ENUM 
CFG80211_SIGNAL(9) 					Device registration					   ENUM CFG80211_SIGNAL(9)

NAME
       enum_cfg80211_signal_type - signal type

SYNOPSIS
       enum cfg80211_signal_type {
	 CFG80211_SIGNAL_TYPE_NONE,
	 CFG80211_SIGNAL_TYPE_MBM,
	 CFG80211_SIGNAL_TYPE_UNSPEC
       };

CONSTANTS
       CFG80211_SIGNAL_TYPE_NONE
	   no signal strength information available

       CFG80211_SIGNAL_TYPE_MBM
	   signal strength in mBm (100*dBm)

       CFG80211_SIGNAL_TYPE_UNSPEC
	   signal strength, increasing from 0 through 100

AUTHOR
       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   ENUM CFG80211_SIGNAL(9)