CDNS_SPI_ISR
while (cdns_spi_read(xspi, CDNS_SPI_ISR) & CDNS_SPI_IXR_RXNEMTY)
cdns_spi_write(xspi, CDNS_SPI_ISR, CDNS_SPI_IXR_ALL);
intr_status = cdns_spi_read(xspi, CDNS_SPI_ISR);
cdns_spi_write(xspi, CDNS_SPI_ISR, intr_status);
if (cdns_spi_read(xspi, CDNS_SPI_ISR) & CDNS_SPI_IXR_TXFULL)
intr_status = cdns_spi_read(xspi, CDNS_SPI_ISR);
cdns_spi_write(xspi, CDNS_SPI_ISR, intr_status);