ath9k_hw: Fix calibration for AR9287 devices
Sujith Manoharan [Tue, 4 Jan 2011 07:46:54 +0000 (12:46 +0530)]
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>

drivers/net/wireless/ath/ath9k/ar9002_calib.c

index 01880aa..ea2e7d7 100644 (file)
@@ -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;
        }
 }