centos man page for freq_reg_info

FREQ_REG_INFO(9)					  Regulatory enforcement infrast					  FREQ_REG_INFO(9)

NAME
       freq_reg_info - get regulatory information for the given frequency

SYNOPSIS
       const struct ieee80211_reg_rule * freq_reg_info(struct wiphy * wiphy, u32 center_freq);

ARGUMENTS
       wiphy
	   the wiphy for which we want to process this rule for

       center_freq
	   Frequency in KHz for which we want regulatory information for

DESCRIPTION
       Use this function to get the regulatory rule for a specific frequency on a given wireless device. If the device has a specific regulatory
       domain it wants to follow we respect that unless a country IE has been received and processed already.

RETURN
       A valid pointer, or, when an error occurs, for example if no rule can be found, the return value is encoded using ERR_PTR. Use IS_ERR to
       check and PTR_ERR to obtain the numeric return value. The numeric return value will be -ERANGE if we determine the given center_freq does
       not even have a regulatory rule for a frequency range in the center_freq's band. See freq_in_rule_band for our current definition of a band
       -- this is purely subjective and right now it's 802.11 specific.

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

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  FREQ_REG_INFO(9)