PWR_DOWN_MASK
ret = regmap_update_bits(priv->syscfg, PHY_CFG_0, PWR_DOWN_MASK,
FIELD_PREP(PWR_DOWN_MASK, 1));
ret = regmap_update_bits(priv->syscfg, PHY_CFG_0, PWR_DOWN_MASK,
FIELD_PREP(PWR_DOWN_MASK, 0));