REG_LCRH_TX
lcr_h = pl011_read(uap, REG_LCRH_TX);
pl011_write(lcr_h, uap, REG_LCRH_TX);
[REG_LCRH_TX] = ST_UART011_LCRH_TX,
pl011_reg_to_offset(uap, REG_LCRH_TX);
pl011_write(lcr_h, uap, REG_LCRH_TX);
pl011_shutdown_channel(uap, REG_LCRH_TX);
lcr_h = pl011_read(uap, REG_LCRH_TX);
[REG_LCRH_TX] = UART011_LCRH,