freq_reg_info man page on Oracle

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FREQ_REG_INFO(9)	Regulatory enforcement infrast	      FREQ_REG_INFO(9)

NAME
       freq_reg_info - get regulatory information for the given frequency

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

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

       desired_bw_khz
	   the desired max bandwidth you want to use per channel. Note that
	   this is still 20 MHz if you want to use HT40 as HT40 makes use of
	   two channels for its 40 MHz width bandwidth. If set to 0 we'll
	   assume you want the standard 20 MHz.

       reg_rule
	   the regulatory rule which we have for this frequency

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.

       Returns 0 if it was able to find a valid regulatory rule which does
       apply to the given center_freq otherwise it returns non-zero. It will
       also return -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 its 802.11 specific.

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

COPYRIGHT
Kernel Hackers Manual 3.8.	   June 2014		      FREQ_REG_INFO(9)
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