GMAC_MTL_CHAN_TX_OP_MODE
reg = dwqe_read(sc, GMAC_MTL_CHAN_TX_OP_MODE(0));
dwqe_write(sc, GMAC_MTL_CHAN_TX_OP_MODE(0), reg);
reg = dwqe_read(sc, GMAC_MTL_CHAN_TX_OP_MODE(0));
mode = dwqe_read(sc, GMAC_MTL_CHAN_TX_OP_MODE(0));
dwqe_write(sc, GMAC_MTL_CHAN_TX_OP_MODE(0), mode);