COM_REG_MCR
[COM_REG_MCR] = AUCOM_MCR,
[COM_REG_MCR] = MIO_UART_MCR_OFFSET,
[COM_REG_MCR] = RA_UART_MCR,
CSR_WRITE_1(regsp, COM_REG_MCR, sc->sc_mcr_active = sc->sc_mcr);
CSR_WRITE_1(regsp, COM_REG_MCR, sc->sc_mcr | MCR_TCR_TLR);
CSR_WRITE_1(regsp, COM_REG_MCR, sc->sc_mcr);
CSR_WRITE_1(regsp, COM_REG_MCR, sc->sc_mcr_active);
[COM_REG_MCR] = com_mcr,
CSR_WRITE_1(regsp, COM_REG_MCR, MCR_DTR | MCR_RTS);
CSR_WRITE_1(regsp, COM_REG_MCR, MCR_DTR | MCR_RTS | MCR_TCR_TLR);
CSR_WRITE_1(regsp, COM_REG_MCR, MCR_DTR | MCR_RTS);
CSR_WRITE_1(&sc->sc_regs, COM_REG_MCR, sc->sc_mcr);