CDNS_SPI_CR_SSCTRL
ctrl_reg |= CDNS_SPI_CR_SSCTRL;
ctrl_reg &= ~CDNS_SPI_CR_SSCTRL;
CDNS_SPI_CR_SSCTRL;
CDNS_SPI_CR_SSCTRL;
CDNS_SPI_CR_SSCTRL | \
ctrl_reg = (ctrl_reg & CDNS_SPI_CR_SSCTRL) >> CDNS_SPI_SS_SHIFT;