SMI_LARB_SLP_CON
writel_relaxed(SLP_PROT_EN, larb->base + SMI_LARB_SLP_CON);
ret = readl_poll_timeout_atomic(larb->base + SMI_LARB_SLP_CON,
writel_relaxed(0, larb->base + SMI_LARB_SLP_CON);