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ath9k: interleaved NF calibration on AR9002 

NF calibration and other elements of long calibration are usually faster
than ADCs & I/Q calibrations due to independence of receiption of the
OFDM signal. Moreover sometime I/Q calibration can not be completed at
all without preceding NF calibration. This is due to AGC, which has a
habit to block a weak signal without regular NF calibration. Thus, we do
not need to deferr the long calibration forever.

So, if the long calibration is requested, then deferr the ADCs & I/Q
calibration(s) and run the longcal (the NF calibration in particular) to
obtain fresh noise data.

Run tested with AR9220.

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200424004923.17129-5-ryazanov.s.a@gmail.com
This commit is contained in:
Sergey Ryazanov 2020-04-24 03:49:21 +03:00 committed by Kalle Valo
parent 41ba50fd6c
commit 2bb7027b64
1 changed files with 6 additions and 2 deletions
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8
drivers/net/wireless/ath/ath9k/ar9002_calib.c
View File

@ -680,8 +680,12 @@ static int ar9002_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
return 0;
ah->cal_list_curr = currCal = currCal->calNext;
if (currCal->calState == CAL_WAITING)
ath9k_hw_reset_calibration(ah, currCal);
percal_pending = currCal->calState == CAL_WAITING;
}
/* Do not start a next calibration if the longcal is in action */
if (percal_pending && !nfcal && !longcal) {
ath9k_hw_reset_calibration(ah, currCal);
return 0;
}