PHY_CTRL_INDATA
err = regmap_write(regmap, SMI_ACCESS_PHY_CTRL_2, FIELD_PREP(PHY_CTRL_INDATA, port));
err = regmap_write(regmap, SMI_ACCESS_PHY_CTRL_2, FIELD_PREP(PHY_CTRL_INDATA, value));
val = FIELD_PREP(PHY_CTRL_INDATA, port);
val = FIELD_PREP(PHY_CTRL_INDATA, value);