ath9k_hw: clean up and fix initial noise floor calibration

On AR9003 the initial noise floor calibration is currently triggered
at the end of the reset without allowing the hardware to update the
baseband settings. This could potentially make scans in noisy
environments a bit more unreliable, so use the same calibration
sequence that is used on AR9002.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 139289e4e93..294016f9ce7 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -158,12 +158,18 @@ bool ath9k_hw_reset_calvalid(struct ath_hw *ah)
 }
 EXPORT_SYMBOL(ath9k_hw_reset_calvalid);
 
-void ath9k_hw_start_nfcal(struct ath_hw *ah)
+void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update)
 {
         REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
                     AR_PHY_AGC_CONTROL_ENABLE_NF);
-        REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
+
+        if (update)
+                REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
                     AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
+        else
+                REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
+                    AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
+
         REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
 }