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ath9k: improve signal strength / channel noise reporting accuracy

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34592 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2012-12-10 13:51:02 +00:00
parent 96c6452cfc
commit c08b08fadf
1 changed files with 22 additions and 0 deletions
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22
package/mac80211/patches/300-pending_work.patch
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@ -561,3 +561,25 @@
ieee80211_rx(ar->hw, skb);
return 0;
}
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -69,6 +69,7 @@ s16 ath9k_hw_getchan_noise(struct ath_hw
if (chan && chan->noisefloor) {
s8 delta = chan->noisefloor -
+ ATH9K_NF_CAL_NOISE_THRESH -
ath9k_hw_get_default_nf(ah, chan);
if (delta > 0)
noise += delta;
--- a/drivers/net/wireless/ath/ath9k/calib.h
+++ b/drivers/net/wireless/ath/ath9k/calib.h
@@ -21,6 +21,9 @@
#define AR_PHY_CCA_FILTERWINDOW_LENGTH 5
+/* Internal noise floor can vary by about 6db depending on the frequency */
+#define ATH9K_NF_CAL_NOISE_THRESH 6
+
#define NUM_NF_READINGS 6
#define ATH9K_NF_CAL_HIST_MAX 5