AR5K_PHY_PAPD_PROBE
{ AR5K_PHY_PAPD_PROBE, 0x00000000 },
{ AR5K_PHY_PAPD_PROBE, 0x00004883 },
{ AR5K_PHY_PAPD_PROBE, 0x00004882 },
AR5K_PHY_PAPD_PROBE_TX_NEXT, AR5K_PHY_PAPD_PROBE);
data = ath5k_hw_reg_read(ah, AR5K_PHY_PAPD_PROBE);