DP83867_RGMIICTL
val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL);
phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val);
val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL);
phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val);