TWSI_CONTROL
sc->sc_regs[TWSI_CONTROL] = 0x0c;
sc->sc_regs[TWSI_CONTROL] = 0x08;
val = sxitwi_read_4(sc, TWSI_CONTROL);
sxitwi_write_4(sc, TWSI_CONTROL, val & ~CONTROL_INTEN);
sxitwi_write_4(sc, TWSI_CONTROL, CONTROL_STOP | sc->sc_twsien_iflg);
sxitwi_write_4(sc, TWSI_CONTROL, control | sc->sc_twsien_iflg);
control = sxitwi_read_4(sc, TWSI_CONTROL);