package/kernel/mac80211/patches/333-ath9k-use-REG_RMW-and-rmw-buffer-in-ath9k_hw_4k_set_.patch

   1 From: Oleksij Rempel <linux@rempel-privat.de>
   2 Date: Sun, 22 Mar 2015 19:30:01 +0100
   3 Subject: [PATCH] ath9k: use REG_RMW and rmw buffer in
   4  ath9k_hw_4k_set_gain
   5
   6 it is possible to reduce time needed for this function
   7 by rplacing REG_WRITE with REG_RMW (plus dummy 0) and putt all commands
   8 in same buffer.
   9
  10 Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
  11 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  12 ---
  13
  14 --- a/drivers/net/wireless/ath/ath9k/eeprom_4k.c
  15 +++ b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
  16 @@ -772,15 +772,14 @@ static void ath9k_hw_4k_set_gain(struct
  17                                  struct ar5416_eeprom_4k *eep,
  18                                  u8 txRxAttenLocal)
  19  {
  20 -       REG_WRITE(ah, AR_PHY_SWITCH_CHAIN_0,
  21 -                 pModal->antCtrlChain[0]);
  22 -
  23 -       REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0),
  24 -                 (REG_READ(ah, AR_PHY_TIMING_CTRL4(0)) &
  25 -                  ~(AR_PHY_TIMING_CTRL4_IQCORR_Q_Q_COFF |
  26 -                    AR_PHY_TIMING_CTRL4_IQCORR_Q_I_COFF)) |
  27 -                 SM(pModal->iqCalICh[0], AR_PHY_TIMING_CTRL4_IQCORR_Q_I_COFF) |
  28 -                 SM(pModal->iqCalQCh[0], AR_PHY_TIMING_CTRL4_IQCORR_Q_Q_COFF));
  29 +       ENABLE_REG_RMW_BUFFER(ah);
  30 +       REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0,
  31 +               pModal->antCtrlChain[0], 0);
  32 +
  33 +       REG_RMW(ah, AR_PHY_TIMING_CTRL4(0),
  34 +               SM(pModal->iqCalICh[0], AR_PHY_TIMING_CTRL4_IQCORR_Q_I_COFF) |
  35 +               SM(pModal->iqCalQCh[0], AR_PHY_TIMING_CTRL4_IQCORR_Q_Q_COFF),
  36 +               AR_PHY_TIMING_CTRL4_IQCORR_Q_Q_COFF | AR_PHY_TIMING_CTRL4_IQCORR_Q_I_COFF);
  37
  38         if ((eep->baseEepHeader.version & AR5416_EEP_VER_MINOR_MASK) >=
  39             AR5416_EEP_MINOR_VER_3) {
  40 @@ -819,6 +818,7 @@ static void ath9k_hw_4k_set_gain(struct
  41                       AR9280_PHY_RXGAIN_TXRX_ATTEN, txRxAttenLocal);
  42         REG_RMW_FIELD(ah, AR_PHY_RXGAIN + 0x1000,
  43                       AR9280_PHY_RXGAIN_TXRX_MARGIN, pModal->rxTxMarginCh[0]);
  44 +       REG_RMW_BUFFER_FLUSH(ah);
  45  }
  46
  47  /*