PTP_MMD
return phy_clear_bits_mmd(clock->phydev, PTP_MMD(clock), reg,
return phy_set_bits_mmd(clock->phydev, PTP_MMD(clock), reg,
return phy_read_mmd(phydev, PTP_MMD(clock), addr);
return phy_write_mmd(phydev, PTP_MMD(clock), addr, val);
return phy_modify_mmd(phydev, PTP_MMD(clock), addr, mask, val);
return phy_set_bits_mmd(phydev, PTP_MMD(clock), addr, val);