diff options
| author | Rajkumar Manoharan <rmanohar@qca.qualcomm.com> | 2012-05-01 09:12:24 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-05-02 14:02:03 -0400 |
| commit | 9d1ceac5c6f7e77ea914de376ec17ced3eb22e5f (patch) | |
| tree | ea37dc37dd2aa34067a5635fe04ceb8a15a0df66 | |
| parent | cf04317227d0c53d931a0b963e7ac6f7f0125e8a (diff) | |
Revert "ath9k_hw: Fix incorrect spur_freq_sd for AR9003"master-2012-05-02
This reverts commit a844adfd7bee4edc66d337de6c33b348e83552a8.
The commit a844adfd is degrading rx sensitivity of lower rate in
HT40 mode and it is confirmed that reverting the change is
improving rx sensitivity.
spur_freq_sd (for self-corr in AGC) is defined with respect to the
center of each 20MHz channel while spur_phase_delta (for self-corr
in Rx and spur data filter) is defined with respect to the center
of current RF channel.
So in short, we need to subtract spur_freq_sd (for self-corr in AGC)
by the offset between the center of primary20 and the center of RF
channel in SW. This offset could be +/10 MHz for dynamic 40.
Cc: Madhan Jaganathan <madhanj@qca.qualcomm.com>
Signed-off-by: Kai Shi <kaishi@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar9003_phy.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c index deb6cfb2959a..600aca9fe6b1 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c @@ -373,7 +373,7 @@ static void ar9003_hw_spur_ofdm_work(struct ath_hw *ah, else spur_subchannel_sd = 0; - spur_freq_sd = (freq_offset << 9) / 11; + spur_freq_sd = ((freq_offset + 10) << 9) / 11; } else { if (REG_READ_FIELD(ah, AR_PHY_GEN_CTRL, @@ -382,7 +382,7 @@ static void ar9003_hw_spur_ofdm_work(struct ath_hw *ah, else spur_subchannel_sd = 1; - spur_freq_sd = (freq_offset << 9) / 11; + spur_freq_sd = ((freq_offset - 10) << 9) / 11; } |