RF_TX_GAIN
ori_txbb = rtw_read_rf(rtwdev, path, RF_TX_GAIN, RFREG_MASK);
rtw_write_rf(rtwdev, path, RF_TX_GAIN, RFREG_MASK, ori_txbb);
data->txbb = (u8)rtw_read_rf(rtwdev, data->path, RF_TX_GAIN,
rtw_write_rf(rtwdev, data->path, RF_TX_GAIN, BIT_GAIN_TXBB, data->txbb);
rtw_write_rf(rtwdev, path, RF_TX_GAIN, BIT_GAIN_TXBB, tx_bb);