SUN4I_DMA_IRQ_ENABLE_REG
irqs = readl_relaxed(priv->base + SUN4I_DMA_IRQ_ENABLE_REG);
priv->base + SUN4I_DMA_IRQ_ENABLE_REG);
writel(0, priv->base + SUN4I_DMA_IRQ_ENABLE_REG);
reg = readl_relaxed(priv->base + SUN4I_DMA_IRQ_ENABLE_REG);
writel_relaxed(reg, priv->base + SUN4I_DMA_IRQ_ENABLE_REG);