SPRD_SPI_CTL1
u32 val = readl_relaxed(ss->base + SPRD_SPI_CTL1);
writel_relaxed(val, ss->base + SPRD_SPI_CTL1);
val = readl_relaxed(ss->base + SPRD_SPI_CTL1);
writel_relaxed(val | mode, ss->base + SPRD_SPI_CTL1);