ath5k: IQ calibration for AR5211 is slightly different

according to the HAL sources the calculation of the Q value is slightly
different for AR5211 chips.

i couldn't test this since IQ calibration never finishes on older parts. this
is a different problem...

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c
index 5aee85f27c0..20d562b07c9 100644
--- a/drivers/net/wireless/ath/ath5k/phy.c
+++ b/drivers/net/wireless/ath/ath5k/phy.c
@@ -1391,7 +1391,11 @@ static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
         }
 
         i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7;
-        q_coffd = q_pwr >> 7;
+
+        if (ah->ah_version == AR5K_AR5211)
+                q_coffd = q_pwr >> 6;
+        else
+                q_coffd = q_pwr >> 7;
 
         /* No correction */
         if (i_coffd == 0 || q_coffd == 0)
@@ -1405,7 +1409,10 @@ static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
         if (i_coff < -32)
                 i_coff = -32;
 
-        q_coff = (((s32)i_pwr / q_coffd) - 128);
+        if (ah->ah_version == AR5K_AR5211)
+                q_coff = (i_pwr / q_coffd) - 64;
+        else
+                q_coff = (i_pwr / q_coffd) - 128;
 
         /* Boundary check */
         if (q_coff > 15)