AR_OBS_BUS_1
seq_printf(file, "pcu observe: 0x%x\n", REG_READ_D(ah, AR_OBS_BUS_1));
last_val = REG_READ(ah, AR_OBS_BUS_1);
reg = REG_READ(ah, AR_OBS_BUS_1);
if (!ath9k_hw_wait(ah, AR_OBS_BUS_1, AR_OBS_BUS_1_RX_STATE,
reg = REG_READ(ah, AR_OBS_BUS_1);