CTL0
val = dma_readl(pd, CTL0);
dma_writel(pd, CTL0, val);
val = dma_readl(pd, CTL0);
dma_writel(pd, CTL0, val);
pd->regs.dma_ctl0 = dma_readl(pd, CTL0);
dma_writel(pd, CTL0, pd->regs.dma_ctl0);
svs_writel_relaxed(svsp, bdata->ctl0, CTL0);
[CTL0] = 0x88,