ath9k_hw: move ath_extend_tsf() to hw code to share as ath9k_hw_extend_tsf()

This will be shared between ath9k and ath9k_htc.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -3710,6 +3710,21 @@ void ath9k_hw_set_tsfadjust(struct ath_hw *ah, u32 setting)
 }
 EXPORT_SYMBOL(ath9k_hw_set_tsfadjust);
 
+/*
+ *  Extend 15-bit time stamp from rx descriptor to
+ *  a full 64-bit TSF using the current h/w TSF.
+*/
+u64 ath9k_hw_extend_tsf(struct ath_hw *ah, u32 rstamp)
+{
+	u64 tsf;
+
+	tsf = ath9k_hw_gettsf64(ah);
+	if ((tsf & 0x7fff) < rstamp)
+		tsf -= 0x8000;
+	return (tsf & ~0x7fff) | rstamp;
+}
+EXPORT_SYMBOL(ath9k_hw_extend_tsf);
+
 bool ath9k_hw_setslottime(struct ath_hw *ah, u32 us)
 {
 	if (us < ATH9K_SLOT_TIME_9 || us > ath9k_hw_mac_to_usec(ah, 0xffff)) {

drivers/net/wireless/ath/ath9k/hw.h

@@ -689,6 +689,7 @@ u64 ath9k_hw_gettsf64(struct ath_hw *ah);
 void ath9k_hw_settsf64(struct ath_hw *ah, u64 tsf64);
 void ath9k_hw_reset_tsf(struct ath_hw *ah);
 void ath9k_hw_set_tsfadjust(struct ath_hw *ah, u32 setting);
+u64 ath9k_hw_extend_tsf(struct ath_hw *ah, u32 rstamp);
 bool ath9k_hw_setslottime(struct ath_hw *ah, u32 us);
 void ath9k_hw_set11nmac2040(struct ath_hw *ah);
 void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period);

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

@@ -86,20 +86,6 @@ static void ath_setdefantenna(struct ath_softc *sc, u32 antenna)
 	sc->rx.rxotherant = 0;
 }
 
-/*
- *  Extend 15-bit time stamp from rx descriptor to
- *  a full 64-bit TSF using the current h/w TSF.
-*/
-static u64 ath_extend_tsf(struct ath_softc *sc, u32 rstamp)
-{
-	u64 tsf;
-
-	tsf = ath9k_hw_gettsf64(sc->sc_ah);
-	if ((tsf & 0x7fff) < rstamp)
-		tsf -= 0x8000;
-	return (tsf & ~0x7fff) | rstamp;
-}
-
 /*
  * For Decrypt or Demic errors, we only mark packet status here and always push
  * up the frame up to let mac80211 handle the actual error case, be it no
@@ -223,7 +209,7 @@ static int ath_rx_prepare(struct ieee80211_hw *hw,
 	if (ieee80211_is_beacon(fc))
 		sc->sc_ah->stats.avgbrssi = rx_stats->rs_rssi;
 
-	rx_status->mactime = ath_extend_tsf(sc, rx_stats->rs_tstamp);
+	rx_status->mactime = ath9k_hw_extend_tsf(sc->sc_ah, rx_stats->rs_tstamp);
 	rx_status->band = hw->conf.channel->band;
 	rx_status->freq = hw->conf.channel->center_freq;
 	rx_status->noise = sc->ani.noise_floor;