ath9k_hw: Fix usec to hw clock conversion in 5Ghz for ar9003

Fast clock operation (44Mhz) is enabled for 5Ghz in ar9003, so
take care of the conversion from usec to hw clock.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 9 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 40b6e8415946..7bb700151ca6 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -25,6 +25,7 @@
 #define ATH9K_CLOCK_RATE_CCK            22
 #define ATH9K_CLOCK_RATE_5GHZ_OFDM      40
 #define ATH9K_CLOCK_RATE_2GHZ_OFDM      44
+#define ATH9K_CLOCK_FAST_RATE_5GHZ_OFDM 44
 
 static bool ath9k_hw_set_reset_reg(struct ath_hw *ah, u32 type);
 
@@ -90,7 +91,11 @@ static u32 ath9k_hw_mac_clks(struct ath_hw *ah, u32 usecs)
                 return usecs *ATH9K_CLOCK_RATE_CCK;
         if (conf->channel->band == IEEE80211_BAND_2GHZ)
                 return usecs *ATH9K_CLOCK_RATE_2GHZ_OFDM;
-        return usecs *ATH9K_CLOCK_RATE_5GHZ_OFDM;
+
+        if (ah->caps.hw_caps & ATH9K_HW_CAP_FASTCLOCK)
+                return usecs * ATH9K_CLOCK_FAST_RATE_5GHZ_OFDM;
+        else
+                return usecs * ATH9K_CLOCK_RATE_5GHZ_OFDM;
 }
 
 static u32 ath9k_hw_mac_to_clks(struct ath_hw *ah, u32 usecs)
@@ -2188,7 +2193,8 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
         }
 
         if (AR_SREV_9300_20_OR_LATER(ah)) {
-                pCap->hw_caps |= ATH9K_HW_CAP_EDMA | ATH9K_HW_CAP_LDPC;
+                pCap->hw_caps |= ATH9K_HW_CAP_EDMA | ATH9K_HW_CAP_LDPC |
+                                 ATH9K_HW_CAP_FASTCLOCK;
                 pCap->rx_hp_qdepth = ATH9K_HW_RX_HP_QDEPTH;
                 pCap->rx_lp_qdepth = ATH9K_HW_RX_LP_QDEPTH;
                 pCap->rx_status_len = sizeof(struct ar9003_rxs);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 6c84d318e31b..7a1347b2453f 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -198,6 +198,7 @@ enum ath9k_hw_caps {
         ATH9K_HW_CAP_EDMA                       = BIT(17),
         ATH9K_HW_CAP_RAC_SUPPORTED              = BIT(18),
         ATH9K_HW_CAP_LDPC                       = BIT(19),
+        ATH9K_HW_CAP_FASTCLOCK                  = BIT(20),
 };
 
 enum ath9k_capability_type {