NPCM_RNGCS_REG
writel(priv->clkp | NPCM_RNG_ENABLE, priv->base + NPCM_RNGCS_REG);
writel(priv->clkp, priv->base + NPCM_RNGCS_REG);
if (readb_poll_timeout(priv->base + NPCM_RNGCS_REG,
if ((readb(priv->base + NPCM_RNGCS_REG) &