--- name: "regulatory_hint" section: "9" platform: "linux" package: "linux-manual-3.16" version: "3.16.56-1+deb8u1" release: "Debian 8 (Jessie)" platforms: ["linux"] url: "https://new.carta.tech/regulatory_hint" --- # regulatory\_hint(9) driver hint to the wireless core a regulatory domain ## NAME regulatory\_hint - driver hint to the wireless core a regulatory domain ## SYNOPSIS **int regulatory\_hint(struct wiphy \*** *wiphy***, const char \*** *alpha2***);** ## ARGUMENTS *wiphy* the wireless device giving the hint (used only for reporting conflicts) *alpha2* the ISO/IEC 3166 alpha2 the driver claims its regulatory domain should be in. If *rd* is set this should be NULL. Note that if you set this to NULL you should still set rd-\>alpha2 to some accepted alpha2. ## DESCRIPTION Wireless drivers can use this function to hint to the wireless core what it believes should be the current regulatory domain by giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory domain should be in or by providing a completely build regulatory domain. If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried for a regulatory domain structure for the respective country. The wiphy must have been registered to cfg80211 prior to this call. For cfg80211 drivers this means you must first use **wiphy\_register**, for mac80211 drivers you must first use **ieee80211\_register\_hw**. Drivers should check the return value, its possible you can get an -ENOMEM. ## RETURN 0 on success. -ENOMEM. ## AUTHOR **Johannes Berg** \ Author. ## COPYRIGHT