|FREQ_REG_INFO(9)||Regulatory enforcement infrast||FREQ_REG_INFO(9)|
freq_reg_info - get regulatory information for the given frequency
const struct ieee80211_reg_rule * freq_reg_info(struct wiphy * wiphy, u32 center_freq);
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.
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.
Johannes Berg <email@example.com>
|January 2017||Kernel Hackers Manual 4.8.|