phy.c

		eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
		if (eee_lp <= 0)
			goto eee_exit_err;

		eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
		if (eee_adv <= 0)
			goto eee_exit_err;

		mmd_eee_adv_to_linkmode(adv, eee_adv);
		mmd_eee_adv_to_linkmode(lp, eee_lp);
		linkmode_and(common, adv, lp);

		if (!phy_check_valid(phydev->speed, phydev->duplex, common))
			goto eee_exit_err;

		if (clk_stop_enable)
			/* Configure the PHY to stop receiving xMII
			 * clock while it is signaling LPI.
			 */
			phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
					 MDIO_PCS_CTRL1_CLKSTOP_EN);

		return 0; /* EEE supported */
	}
eee_exit_err:
	return -EPROTONOSUPPORT;
}
EXPORT_SYMBOL(phy_init_eee);

/**
 * phy_get_eee_err - report the EEE wake error count
 * @phydev: target phy_device struct
 *
 * Description: it is to report the number of time where the PHY
 * failed to complete its normal wake sequence.
 */
int phy_get_eee_err(struct phy_device *phydev)
{
	if (!phydev->drv)
		return -EIO;

	return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
}
EXPORT_SYMBOL(phy_get_eee_err);

/**
 * phy_ethtool_get_eee - get EEE supported and status
 * @phydev: target phy_device struct
 * @data: ethtool_eee data
 *
 * Description: it reportes the Supported/Advertisement/LP Advertisement
 * capabilities.
 */
int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
	int val;

	if (!phydev->drv)
		return -EIO;

	/* Get Supported EEE */
	val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
	if (val < 0)
		return val;
	data->supported = mmd_eee_cap_to_ethtool_sup_t(val);

	/* Get advertisement EEE */
	val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
	if (val < 0)
		return val;
	data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
	data->eee_enabled = !!data->advertised;

	/* Get LP advertisement EEE */
	val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
	if (val < 0)
		return val;
	data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);

	data->eee_active = !!(data->advertised & data->lp_advertised);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_eee);

/**
 * phy_ethtool_set_eee - set EEE supported and status
 * @phydev: target phy_device struct
 * @data: ethtool_eee data
 *
 * Description: it is to program the Advertisement EEE register.
 */
int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
	int cap, old_adv, adv = 0, ret;

	if (!phydev->drv)
		return -EIO;

	/* Get Supported EEE */
	cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
	if (cap < 0)
		return cap;

	old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
	if (old_adv < 0)
		return old_adv;

	if (data->eee_enabled) {
		adv = !data->advertised ? cap :
		      ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
		/* Mask prohibited EEE modes */
		adv &= ~phydev->eee_broken_modes;
	}

	if (old_adv != adv) {
		ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
		if (ret < 0)
			return ret;

		/* Restart autonegotiation so the new modes get sent to the
		 * link partner.
		 */
		ret = phy_restart_aneg(phydev);
		if (ret < 0)
			return ret;
	}

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_set_eee);

int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
{
	if (phydev->drv && phydev->drv->set_wol)
		return phydev->drv->set_wol(phydev, wol);

	return -EOPNOTSUPP;
}
EXPORT_SYMBOL(phy_ethtool_set_wol);

void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
{
	if (phydev->drv && phydev->drv->get_wol)
		phydev->drv->get_wol(phydev, wol);
}
EXPORT_SYMBOL(phy_ethtool_get_wol);

int phy_ethtool_get_link_ksettings(struct net_device *ndev,
				   struct ethtool_link_ksettings *cmd)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	phy_ethtool_ksettings_get(phydev, cmd);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);

int phy_ethtool_set_link_ksettings(struct net_device *ndev,
				   const struct ethtool_link_ksettings *cmd)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	return phy_ethtool_ksettings_set(phydev, cmd);
}
EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);

int phy_ethtool_nway_reset(struct net_device *ndev)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	if (!phydev->drv)
		return -EIO;

	return phy_restart_aneg(phydev);
}
EXPORT_SYMBOL(phy_ethtool_nway_reset);