ath9k: add noise floor override option

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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>

...

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Simon Wunderlich 2017-03-23 14:30:48 +01:00 • committed by Kalle Valo

parent aad1fd7f76

commit b90189759a

3 changed files with 67 additions and 1 deletions

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5

drivers/net/wireless/ath/ath9k/calib.c

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62

drivers/net/wireless/ath/ath9k/debug.c

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1

drivers/net/wireless/ath/ath9k/hw.h

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