SSCR1_RxTresh
chip->threshold = (SSCR1_RxTresh(rx_thres) & SSCR1_RFT) |
SSCR1_RxTresh(2) |
tmp = SSCR1_RxTresh(RX_THRESH_DFLT) |
*sccr1_reg |= SSCR1_RxTresh(threshold);
dma_thresh = SSCR1_RxTresh(RX_THRESH_DFLT) | SSCR1_TxTresh(TX_THRESH_DFLT);
sscr1 |= SSCR1_RxTresh(8) | SSCR1_TxTresh(7);