IITSR
tmp = readl_relaxed(priv->base + IITSR);
writel_relaxed(tmp, priv->base + IITSR);
cache->iitsr = readl_relaxed(base + IITSR);
writel_relaxed(cache->iitsr, base + IITSR);
iitsr = readl_relaxed(priv->base + IITSR);