IMX7ULP_CR
temp = readl(fsl_lpspi->base + IMX7ULP_CR);
writel(temp, fsl_lpspi->base + IMX7ULP_CR);
writel(CR_RRF | CR_RTF, fsl_lpspi->base + IMX7ULP_CR);
writel(temp, fsl_lpspi->base + IMX7ULP_CR);