diff options
| author | Simon Wunderlich <sw@simonwunderlich.de> | 2017-03-23 16:30:48 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2017-04-19 17:08:27 +0300 |
| commit | b90189759a7ff92aa47e8878f6b5a9f868e19895 (patch) | |
| tree | 8ec504e7d85ac305e225a329915f28d9e92f61c3 /drivers/net/wireless/ath/ath9k/calib.c | |
| parent | aad1fd7f7677d05013b5fe247a5a6e1464c69a0f (diff) | |
| download | linux-b90189759a7ff92aa47e8878f6b5a9f868e19895.tar.xz | |
ath9k: add noise floor override option
Introduce a debugfs option to manually override the noise floor,
ignoring the automatically tuned noise floor of the driver/hw.
In my tests with a AR9580 based module and a tx99 5 MHz interferer,
I could tune the noisefloor to -95 dBm or above to allow communication
again. The automatic noise floor calibration sometimes could adapt to
the situation as well, but not reliably and permanently.
I would consider this "feature" experimental and interesting for people
debugging the noise floor calibration or other effects of the hardware.
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fit.fraunhofer.de>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/calib.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/calib.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c index 0f71146b781d..13ab6bc46775 100644 --- a/drivers/net/wireless/ath/ath9k/calib.c +++ b/drivers/net/wireless/ath/ath9k/calib.c @@ -254,7 +254,9 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) if ((i >= AR5416_MAX_CHAINS) && !IS_CHAN_HT40(chan)) continue; - if (h) + if (ah->nf_override) + nfval = ah->nf_override; + else if (h) nfval = h[i].privNF; else nfval = default_nf; @@ -348,6 +350,7 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) return 0; } +EXPORT_SYMBOL(ath9k_hw_loadnf); static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf) |