ALT_PR_CSR_OFST
val = readl(priv->reg_base + ALT_PR_CSR_OFST);
val = readl(priv->reg_base + ALT_PR_CSR_OFST);
val = readl(priv->reg_base + ALT_PR_CSR_OFST);
writel(val | ALT_PR_CSR_PR_START, priv->reg_base + ALT_PR_CSR_OFST);