IR_INTC
writel_relaxed(INT_CLR_OVERFLOW, priv->base + IR_INTC);
writel_relaxed(INT_CLR_RCV, priv->base + IR_INTC);
writel_relaxed(INT_CLR_TIMEOUT, priv->base + IR_INTC);
writel_relaxed(0xff, priv->base + IR_INTC);