LPC_INT_CTL
writel(LPC_INT_CTL_EN, priv->base + LPC_INT_CTL);
pch_lpc_priv->saved_reg_ctl = readl(pch_lpc_priv->base + LPC_INT_CTL);
writel(pch_lpc_priv->saved_reg_ctl, pch_lpc_priv->base + LPC_INT_CTL);