FSPI_MCR0
reg = read_reg(sc, FSPI_MCR0);
write_reg(sc, FSPI_MCR0, reg);
ret = reg_read_poll_tout(sc, FSPI_MCR0, FSPI_MCR0_SWRST, 1000, POLL_TOUT, 0);
write_reg(sc, FSPI_MCR0, FSPI_MCR0_MDIS);
write_reg(sc, FSPI_MCR0, FSPI_MCR0_AHB_TIMEOUT(0xFF) |