ath9k_hw: Read and configure xpa timing field

Configure xpa timing field while loading boad defaults to
fix 11b CCK spur issue that was observed in EMI testing.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9003_eeprom.c

@@ -3411,6 +3411,7 @@ static u32 ar9003_dump_modal_eeprom(char *buf, u32 len, u32 size,
 	PR_EEP("Chain1 NF Threshold", modal_hdr->noiseFloorThreshCh[1]);
 	PR_EEP("Chain2 NF Threshold", modal_hdr->noiseFloorThreshCh[2]);
 	PR_EEP("Quick Drop", modal_hdr->quick_drop);
+	PR_EEP("txEndToXpaOff", modal_hdr->txEndToXpaOff);
 	PR_EEP("xPA Bias Level", modal_hdr->xpaBiasLvl);
 	PR_EEP("txFrameToDataStart", modal_hdr->txFrameToDataStart);
 	PR_EEP("txFrameToPaOn", modal_hdr->txFrameToPaOn);
@@ -3956,6 +3957,20 @@ static void ar9003_hw_quick_drop_apply(struct ath_hw *ah, u16 freq)
 	REG_RMW_FIELD(ah, AR_PHY_AGC, AR_PHY_AGC_QUICK_DROP, quick_drop);
 }
 
+static void ar9003_hw_txend_to_xpa_off_apply(struct ath_hw *ah, u16 freq)
+{
+	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+	u32 value;
+
+	value = (freq < 4000) ? eep->modalHeader2G.txEndToXpaOff :
+				eep->modalHeader5G.txEndToXpaOff;
+
+	REG_RMW_FIELD(ah, AR_PHY_XPA_TIMING_CTL,
+		      AR_PHY_XPA_TIMING_CTL_TX_END_XPAB_OFF, value);
+	REG_RMW_FIELD(ah, AR_PHY_XPA_TIMING_CTL,
+		      AR_PHY_XPA_TIMING_CTL_TX_END_XPAA_OFF, value);
+}
+
 static void ath9k_hw_ar9300_set_board_values(struct ath_hw *ah,
 					     struct ath9k_channel *chan)
 {
@@ -3968,6 +3983,7 @@ static void ath9k_hw_ar9300_set_board_values(struct ath_hw *ah,
 		ar9003_hw_internal_regulator_apply(ah);
 	if (AR_SREV_9485(ah) || AR_SREV_9330(ah) || AR_SREV_9340(ah))
 		ar9003_hw_apply_tuning_caps(ah);
+	ar9003_hw_txend_to_xpa_off_apply(ah, chan->channel);
 }
 
 static void ath9k_hw_ar9300_set_addac(struct ath_hw *ah,