wireless: add wiphy channel freq to channel struct lookup helper

Add ieee80211_get_channel() which gets you a channel struct for a
specific wiphy if that channel is present in that wiphy.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/net/wireless.h b/include/net/wireless.h
index c7f805ee5545..f4b77ab66bae 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -304,4 +304,10 @@ extern int ieee80211_channel_to_frequency(int chan);
  */
 extern int ieee80211_frequency_to_channel(int freq);
 
+/**
+ * ieee80211_get_channel - get channel struct from wiphy for specified frequency
+ */
+extern struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy,
+                                                       int freq);
+
 #endif /* __NET_WIRELESS_H */