carl9170: improve site survey
The firmware keeps track of channel usage. This data can
be used by the automatic channel selection to find the
*best* channel.
Survey data from wlan22
frequency: 2412 MHz [in use]
noise: -86 dBm
channel active time: 3339608 ms
channel busy time: 270982 ms
channel transmit time: 121515 ms
Survey data from wlan22
frequency: 2417 MHz
noise: -86 dBm
channel active time: 70 ms
channel busy time: 2 ms
channel transmit time: 1 ms
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/carl9170/phy.c b/drivers/net/wireless/ath/carl9170/phy.c
index 8635c5c..472efc7 100644
--- a/drivers/net/wireless/ath/carl9170/phy.c
+++ b/drivers/net/wireless/ath/carl9170/phy.c
@@ -1573,6 +1573,9 @@
AR9170_PHY_EXT_CCA_MIN_PWR, phy_res[i + 2]), 8);
}
+ if (ar->channel)
+ ar->survey[ar->channel->hw_value].noise = ar->noise[0];
+
return 0;
}
@@ -1765,10 +1768,6 @@
ar->chan_fail = 0;
}
- err = carl9170_get_noisefloor(ar);
- if (err)
- return err;
-
if (ar->heavy_clip) {
err = carl9170_write_reg(ar, AR9170_PHY_REG_HEAVY_CLIP_ENABLE,
0x200 | ar->heavy_clip);