net: fec: use phydev->eee_cfg.tx_lpi_timer

Rather than maintaining a private copy of the LPI timer, make use of
the LPI timer maintained by phylib. In any case, phylib overwrites the
value of tx_lpi_timer set by the driver in phy_ethtool_get_eee().

Note that feb->eee.tx_lpi_timer is initialised to zero, which is just
the same with phylib's copy, so there should be no functional change.

Signed-off-by: Russell King (Oracle) <[e-mail]>
Tested-by: Wei Fang <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/freescale/fec.h

···
 	unsigned int tx_time_itr;
 	unsigned int itr_clk_rate;
 
-	/* tx lpi eee mode */
-	struct ethtool_keee eee;
 	unsigned int clk_ref_rate;
 
 	/* ptp clock period in ns*/

drivers/net/ethernet/freescale/fec_main.c

···
 	return us * (fep->clk_ref_rate / 1000) / 1000;
 }
 
-static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable)
+static int fec_enet_eee_mode_set(struct net_device *ndev, u32 lpi_timer,
+				 bool enable)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct ethtool_keee *p = &fep->eee;
 	unsigned int sleep_cycle, wake_cycle;
 
 	if (enable) {
-		sleep_cycle = fec_enet_us_to_tx_cycle(ndev, p->tx_lpi_timer);
+		sleep_cycle = fec_enet_us_to_tx_cycle(ndev, lpi_timer);
 		wake_cycle = sleep_cycle;
 	} else {
 		sleep_cycle = 0;
···
 			napi_enable(&fep->napi);
 		}
 		if (fep->quirks & FEC_QUIRK_HAS_EEE)
-			fec_enet_eee_mode_set(ndev, phy_dev->enable_tx_lpi);
+			fec_enet_eee_mode_set(ndev,
+					      phy_dev->eee_cfg.tx_lpi_timer,
+					      phy_dev->enable_tx_lpi);
 	} else {
 		if (fep->link) {
 			netif_stop_queue(ndev);
···
 fec_enet_get_eee(struct net_device *ndev, struct ethtool_keee *edata)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct ethtool_keee *p = &fep->eee;
 
 	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
 		return -EOPNOTSUPP;
 
 	if (!netif_running(ndev))
 		return -ENETDOWN;
-
-	edata->tx_lpi_timer = p->tx_lpi_timer;
 
 	return phy_ethtool_get_eee(ndev->phydev, edata);
 }
···
 fec_enet_set_eee(struct net_device *ndev, struct ethtool_keee *edata)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct ethtool_keee *p = &fep->eee;
 
 	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
 		return -EOPNOTSUPP;
 
 	if (!netif_running(ndev))
 		return -ENETDOWN;
-
-	p->tx_lpi_timer = edata->tx_lpi_timer;
 
 	return phy_ethtool_set_eee(ndev->phydev, edata);
 }