XIPIF_V123B_IISR_OFFSET
isr = xspi->read_fn(xspi->regs + XIPIF_V123B_IISR_OFFSET);
xspi->regs + XIPIF_V123B_IISR_OFFSET);
ipif_isr = xspi->read_fn(xspi->regs + XIPIF_V123B_IISR_OFFSET);
xspi->write_fn(ipif_isr, xspi->regs + XIPIF_V123B_IISR_OFFSET);