ath9k_hw: Fix calibration for AR9287 devices

AR9287 based devices have issues with ADC gain calibration
which would cause uplink throughput drops in HT40 mode.
Remove ADC gain from the supported calibration algorithms.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ar9002_calib.c b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
index 01880aa13e369af80b9e4059b7e60dc3c8907860..ea2e7d714bdad0888e070dc61faf5acfba26ff15 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
@@ -954,6 +954,9 @@ static void ar9002_hw_init_cal_settings(struct ath_hw *ah)
                                &adc_dc_cal_multi_sample;
                }
                ah->supp_cals = ADC_GAIN_CAL | ADC_DC_CAL | IQ_MISMATCH_CAL;
+
+               if (AR_SREV_9287(ah))
+                       ah->supp_cals &= ~ADC_GAIN_CAL;
        }
 }