mv88e639x_sgmii_pcs_control_pwr
mv88e639x_sgmii_pcs_control_pwr(mpcs, false);
mv88e639x_sgmii_pcs_control_pwr(mpcs, false);
mv88e639x_sgmii_pcs_control_pwr(mpcs, true);
err = mv88e639x_sgmii_pcs_control_pwr(mpcs, false);