ath9k: Reduce the frequency of PA offset calibration
PA calibration need not be done if the offset is not varying.
The current logic does PA calibration even if the offset is the
same.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 20f74b5..47a024d 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -861,7 +861,7 @@
REG_WRITE(ah, regList[i][0], regList[i][1]);
}
-static inline void ath9k_hw_9285_pa_cal(struct ath_hw *ah)
+static inline void ath9k_hw_9285_pa_cal(struct ath_hw *ah, bool is_reset)
{
u32 regVal;
@@ -877,6 +877,8 @@
{ 0x7838, 0 },
};
+ DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, "Running PA Calibration\n");
+
if (AR_SREV_9285_11(ah)) {
REG_WRITE(ah, AR9285_AN_TOP4, (AR9285_AN_TOP4_DEFAULT | 0x14));
udelay(10);
@@ -936,6 +938,17 @@
offs_6_1 = offset>>1;
offs_0 = offset & 1;
+ if ((!is_reset) && (ah->pacal_info.prev_offset == offset)) {
+ if (ah->pacal_info.max_skipcount < MAX_PACAL_SKIPCOUNT)
+ ah->pacal_info.max_skipcount =
+ 2 * ah->pacal_info.max_skipcount;
+ ah->pacal_info.skipcount = ah->pacal_info.max_skipcount;
+ } else {
+ ah->pacal_info.max_skipcount = 1;
+ ah->pacal_info.skipcount = 0;
+ ah->pacal_info.prev_offset = offset;
+ }
+
REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_OFFS, offs_6_1);
REG_RMW_FIELD(ah, AR9285_AN_RF2G3, AR9285_AN_RF2G3_PDVCCOMP, offs_0);
@@ -982,8 +995,12 @@
/* Do periodic PAOffset Cal */
if (AR_SREV_9271(ah))
ath9k_hw_9271_pa_cal(ah);
- else if (AR_SREV_9285_11_OR_LATER(ah))
- ath9k_hw_9285_pa_cal(ah);
+ else if (AR_SREV_9285_11_OR_LATER(ah)) {
+ if (!ah->pacal_info.skipcount)
+ ath9k_hw_9285_pa_cal(ah, false);
+ else
+ ah->pacal_info.skipcount--;
+ }
if (OLC_FOR_AR9280_20_LATER || OLC_FOR_AR9287_10_LATER)
ath9k_olc_temp_compensation(ah);
@@ -1081,7 +1098,7 @@
/* Do PA Calibration */
if (AR_SREV_9285_11_OR_LATER(ah))
- ath9k_hw_9285_pa_cal(ah);
+ ath9k_hw_9285_pa_cal(ah, true);
/* Do NF Calibration after DC offset and other calibrations */
REG_WRITE(ah, AR_PHY_AGC_CONTROL,