COM_REG_DLBL
[COM_REG_DLBL] = AUCOM_DLB,
[COM_REG_DLBL] = MIO_UART_DLL_OFFSET,
[COM_REG_DLBL] = RA_UART_DLL,
CSR_WRITE_2(regsp, COM_REG_DLBL, sc->sc_dlbl +
CSR_WRITE_1(regsp, COM_REG_DLBL, sc->sc_dlbl);
CSR_WRITE_1(regsp, COM_REG_DLBL, sc->sc_dlbl);
CSR_WRITE_1(regsp, COM_REG_DLBL, sc->sc_dlbl);
[COM_REG_DLBL] = com_dlbl,
CSR_WRITE_2(regsp, COM_REG_DLBL, rate);
CSR_WRITE_1(regsp, COM_REG_DLBL, rate & 0xff);