nl80211/mac80211: Report signal average

Extend nl80211 to report an exponential weighted moving average (EWMA) of the
signal value. Since the signal value usually fluctuates between different
packets, an average can be more useful than the value of the last packet.

This uses the recently added generic EWMA library function.

--
v2:	fix ABI breakage and change factor to be a power of 2.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 410a06ea551b..8e28053ea423 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1191,6 +1191,7 @@ enum nl80211_rate_info {
  *      station)
  * @NL80211_STA_INFO_TX_RETRIES: total retries (u32, to this station)
  * @NL80211_STA_INFO_TX_FAILED: total failed packets (u32, to this station)
+ * @NL80211_STA_INFO_SIGNAL_AVG: signal strength average (u8, dBm)
  */
 enum nl80211_sta_info {
         __NL80211_STA_INFO_INVALID,
@@ -1206,6 +1207,7 @@ enum nl80211_sta_info {
         NL80211_STA_INFO_TX_PACKETS,
         NL80211_STA_INFO_TX_RETRIES,
         NL80211_STA_INFO_TX_FAILED,
+        NL80211_STA_INFO_SIGNAL_AVG,
 
         /* keep last */
         __NL80211_STA_INFO_AFTER_LAST,