PHY_CNFG_PAD_SN_MASK
val |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, PHY_CNFG_PAD_SN_SG2042);
drv |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, (priv->drive_impedance >> 4) & 0xF);
val |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, PHY_CNFG_PAD_SN);