From: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Date: Mon, 15 Oct 2012 09:59:51 +0000 (+0530)
Subject: ath9k_hw: Fix max rx rate drop for AR9565
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=6f37ff96d3bd2a53e68131a7c10ced933815b390;p=openwrt%2Fstaging%2Fblogic.git

ath9k_hw: Fix max rx rate drop for AR9565

Whenever i_coff of IQ calibration is too high, AR9565 drops max
rx rate to MCS4. Skipping IQ update at this time can avoid this
problem for AR9565.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index 84b558d126ca..162401f22f8c 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -276,6 +276,11 @@ static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
 				offset_array[i],
 				REG_READ(ah, offset_array[i]));
 
+			if (AR_SREV_9565(ah) &&
+			    (iCoff == 63 || qCoff == 63 ||
+			     iCoff == -63 || qCoff == -63))
+				return;
+
 			REG_RMW_FIELD(ah, offset_array[i],
 				      AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
 				      iCoff);