sc_fifolvl
bytes = min(sc->sc_len - sc->sc_written, sc->sc_fifolvl);
if (sc->sc_fifolvl == 1) {
bytes = min(sc->sc_len - sc->sc_read, sc->sc_fifolvl);
if (sc->sc_fifolvl == 1) {
sc->sc_fifolvl = ti_spi_gcd(sc->sc_len, TI_SPI_FIFOSZ);
if (sc->sc_fifolvl < 2 || sc->sc_len > 0xffff)
sc->sc_fifolvl = 1; /* FIFO disabled. */
sc->sc_fifolvl = 1;
if (sc->sc_fifolvl == 1)