SHADOW_LOAD
bcm_phy_write_exp(phydev, SHADOW_LOAD, TIME_CODE_LOAD | NCO_TIME_LOAD);
bcm_phy_write_exp(priv->phydev, SHADOW_LOAD, FREQ_LOAD);
bcm_phy_write_exp(priv->phydev, SHADOW_LOAD, 0);
bcm_phy_write_exp(phydev, SHADOW_LOAD, SYNC_OUT_LOAD);