Subject: [PATCH net-next V3 3/4] net: lan743x: Migrate phylib to phylink

From: Raju Lakkaraju <[email-masked]>
Date: Tue, 30 Jul 2024 19:36:18 +0530

Migrate phy support from phylib to phylink.
Fixed phy support is still used together with phylink since we need to support
dynamic fallback when a phy is not found over mdio. While phylink's FIXED mode
supports fixed phys that, it's dynamic and requires device tree entries which
are most of the time not present for LAN743x devices.

Signed-off-by: Raju Lakkaraju <[email-masked]>
---
Change List:                                                                    
============                                                                    
V2 -> V3:                                                                       
  - Remove the unwanted parens in each of these if() sub-blocks                 
  - Replace "to_net_dev(config->dev)" with "netdev".                            
  - Add GMII_ID/RGMII_TXID/RGMII_RXID in supported_interfaces                   
  - Fix the lan743x_phy_handle_exists( ) return type

V1 -> V2:                                                                       
  - Split the PHYLINK and SFP changes in 2 different patch series                                                                  
 
 drivers/net/ethernet/microchip/Kconfig        |   5 +-
 drivers/net/ethernet/microchip/lan743x_main.c | 574 +++++++++++-------
 drivers/net/ethernet/microchip/lan743x_main.h |   3 +
 3 files changed, 355 insertions(+), 227 deletions(-)

diff --git a/drivers/net/ethernet/microchip/Kconfig b/drivers/net/ethernet/microchip/Kconfig
index 43ba71e82260..4b7a0433b7e5 100644
--- a/drivers/net/ethernet/microchip/Kconfig
+++ b/drivers/net/ethernet/microchip/Kconfig
@@ -46,12 +46,13 @@ config LAN743X
 	tristate "LAN743x support"
 	depends on PCI
 	depends on PTP_1588_CLOCK_OPTIONAL
-	select PHYLIB
 	select FIXED_PHY
 	select CRC16
 	select CRC32
+	select PHYLINK
 	help
-	  Support for the Microchip LAN743x PCI Express Gigabit Ethernet chip
+	  Support for the Microchip LAN743x and PCI11x1x families of PCI
+	  Express Ethernet devices
 
 	  To compile this driver as a module, choose M here. The module will be
 	  called lan743x.
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index b4a4c2840a83..845a48ca497d 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -15,6 +15,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/iopoll.h>
 #include <linux/crc16.h>
+#include <linux/phylink.h>
 #include "lan743x_main.h"
 #include "lan743x_ethtool.h"
 
@@ -1077,26 +1078,7 @@ static int lan743x_sgmii_2_5G_mode_set(struct lan743x_adapter *adapter,
 					      VR_MII_BAUD_RATE_1P25GBPS);
 }
 
-static int lan743x_is_sgmii_2_5G_mode(struct lan743x_adapter *adapter,
-				      bool *status)
-{
-	int ret;
-
-	ret = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2,
-				 VR_MII_GEN2_4_MPLL_CTRL1);
-	if (ret < 0)
-		return ret;
-
-	if (ret == VR_MII_MPLL_MULTIPLIER_125 ||
-	    ret == VR_MII_MPLL_MULTIPLIER_50)
-		*status = true;
-	else
-		*status = false;
-
-	return 0;
-}
-
-static int lan743x_sgmii_aneg_update(struct lan743x_adapter *adapter)
+static int lan743x_serdes_clock_and_aneg_update(struct lan743x_adapter *adapter)
 {
 	enum lan743x_sgmii_lsd lsd = adapter->sgmii_lsd;
 	int mii_ctrl;
@@ -1211,49 +1193,6 @@ static int lan743x_pcs_power_reset(struct lan743x_adapter *adapter)
 	return lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_UP);
 }
 
-static int lan743x_sgmii_config(struct lan743x_adapter *adapter)
-{
-	struct net_device *netdev = adapter->netdev;
-	struct phy_device *phydev = netdev->phydev;
-	bool status;
-	int ret;
-
-	ret = lan743x_get_lsd(phydev->speed, phydev->duplex,
-			      phydev->master_slave_state);
-	if (ret < 0) {
-		netif_err(adapter, drv, adapter->netdev,
-			  "error %d link-speed-duplex(LSD) invalid\n", ret);
-		return ret;
-	}
-
-	adapter->sgmii_lsd = ret;
-	netif_dbg(adapter, drv, adapter->netdev,
-		  "Link Speed Duplex (lsd) : 0x%X\n", adapter->sgmii_lsd);
-
-	ret = lan743x_sgmii_aneg_update(adapter);
-	if (ret < 0) {
-		netif_err(adapter, drv, adapter->netdev,
-			  "error %d SGMII cfg failed\n", ret);
-		return ret;
-	}
-
-	ret = lan743x_is_sgmii_2_5G_mode(adapter, &status);
-	if (ret < 0) {
-		netif_err(adapter, drv, adapter->netdev,
-			  "error %d SGMII get mode failed\n", ret);
-		return ret;
-	}
-
-	if (status)
-		netif_dbg(adapter, drv, adapter->netdev,
-			  "SGMII 2.5G mode enable\n");
-	else
-		netif_dbg(adapter, drv, adapter->netdev,
-			  "SGMII 1G mode enable\n");
-
-	return lan743x_pcs_power_reset(adapter);
-}
-
 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
 				    u8 *addr)
 {
@@ -1407,103 +1346,11 @@ static int lan743x_phy_reset(struct lan743x_adapter *adapter)
 				  50000, 1000000);
 }
 
-static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
-					   u16 local_adv, u16 remote_adv)
-{
-	struct lan743x_phy *phy = &adapter->phy;
-	u8 cap;
-
-	if (phy->fc_autoneg)
-		cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
-	else
-		cap = phy->fc_request_control;
-
-	lan743x_mac_flow_ctrl_set_enables(adapter,
-					  cap & FLOW_CTRL_TX,
-					  cap & FLOW_CTRL_RX);
-}
-
 static int lan743x_phy_init(struct lan743x_adapter *adapter)
 {
 	return lan743x_phy_reset(adapter);
 }
 
-static void lan743x_phy_link_status_change(struct net_device *netdev)
-{
-	struct lan743x_adapter *adapter = netdev_priv(netdev);
-	struct phy_device *phydev = netdev->phydev;
-	u32 data;
-
-	phy_print_status(phydev);
-	if (phydev->state == PHY_RUNNING) {
-		int remote_advertisement = 0;
-		int local_advertisement = 0;
-
-		data = lan743x_csr_read(adapter, MAC_CR);
-
-		/* set duplex mode */
-		if (phydev->duplex)
-			data |= MAC_CR_DPX_;
-		else
-			data &= ~MAC_CR_DPX_;
-
-		/* set bus speed */
-		switch (phydev->speed) {
-		case SPEED_10:
-			data &= ~MAC_CR_CFG_H_;
-			data &= ~MAC_CR_CFG_L_;
-		break;
-		case SPEED_100:
-			data &= ~MAC_CR_CFG_H_;
-			data |= MAC_CR_CFG_L_;
-		break;
-		case SPEED_1000:
-			data |= MAC_CR_CFG_H_;
-			data &= ~MAC_CR_CFG_L_;
-		break;
-		case SPEED_2500:
-			data |= MAC_CR_CFG_H_;
-			data |= MAC_CR_CFG_L_;
-		break;
-		}
-		lan743x_csr_write(adapter, MAC_CR, data);
-
-		local_advertisement =
-			linkmode_adv_to_mii_adv_t(phydev->advertising);
-		remote_advertisement =
-			linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
-
-		lan743x_phy_update_flowcontrol(adapter, local_advertisement,
-					       remote_advertisement);
-		lan743x_ptp_update_latency(adapter, phydev->speed);
-		if (phydev->interface == PHY_INTERFACE_MODE_SGMII ||
-		    phydev->interface == PHY_INTERFACE_MODE_1000BASEX ||
-		    phydev->interface == PHY_INTERFACE_MODE_2500BASEX)
-			lan743x_sgmii_config(adapter);
-
-		data = lan743x_csr_read(adapter, MAC_CR);
-		if (phydev->enable_tx_lpi)
-			data |=  MAC_CR_EEE_EN_;
-		else
-			data &= ~MAC_CR_EEE_EN_;
-		lan743x_csr_write(adapter, MAC_CR, data);
-	}
-}
-
-static void lan743x_phy_close(struct lan743x_adapter *adapter)
-{
-	struct net_device *netdev = adapter->netdev;
-	struct phy_device *phydev = netdev->phydev;
-
-	phy_stop(netdev->phydev);
-	phy_disconnect(netdev->phydev);
-
-	/* using phydev here as phy_disconnect NULLs netdev->phydev */
-	if (phy_is_pseudo_fixed_link(phydev))
-		fixed_phy_unregister(phydev);
-
-}
-
 static void lan743x_phy_interface_select(struct lan743x_adapter *adapter)
 {
 	u32 id_rev;
@@ -1520,65 +1367,9 @@ static void lan743x_phy_interface_select(struct lan743x_adapter *adapter)
 		adapter->phy_interface = PHY_INTERFACE_MODE_MII;
 	else
 		adapter->phy_interface = PHY_INTERFACE_MODE_RGMII;
-}
 
-static int lan743x_phy_open(struct lan743x_adapter *adapter)
-{
-	struct net_device *netdev = adapter->netdev;
-	struct lan743x_phy *phy = &adapter->phy;
-	struct fixed_phy_status fphy_status = {
-		.link = 1,
-		.speed = SPEED_1000,
-		.duplex = DUPLEX_FULL,
-	};
-	struct phy_device *phydev;
-	int ret = -EIO;
-
-	/* try devicetree phy, or fixed link */
-	phydev = of_phy_get_and_connect(netdev, adapter->pdev->dev.of_node,
-					lan743x_phy_link_status_change);
-
-	if (!phydev) {
-		/* try internal phy */
-		phydev = phy_find_first(adapter->mdiobus);
-		if (!phydev)	{
-			if ((adapter->csr.id_rev & ID_REV_ID_MASK_) ==
-					ID_REV_ID_LAN7431_) {
-				phydev = fixed_phy_register(PHY_POLL,
-							    &fphy_status, NULL);
-				if (IS_ERR(phydev)) {
-					netdev_err(netdev, "No PHY/fixed_PHY found\n");
-					return PTR_ERR(phydev);
-				}
-			} else {
-				goto return_error;
-				}
-		}
-
-		lan743x_phy_interface_select(adapter);
-
-		ret = phy_connect_direct(netdev, phydev,
-					 lan743x_phy_link_status_change,
-					 adapter->phy_interface);
-		if (ret)
-			goto return_error;
-	}
-
-	/* MAC doesn't support 1000T Half */
-	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
-
-	/* support both flow controls */
-	phy_support_asym_pause(phydev);
-	phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
-	phy->fc_autoneg = phydev->autoneg;
-
-	phy_start(phydev);
-	phy_start_aneg(phydev);
-	phy_attached_info(phydev);
-	return 0;
-
-return_error:
-	return ret;
+	netif_dbg(adapter, drv, adapter->netdev,
+		  "selected phy interface: 0x%X\n", adapter->phy_interface);
 }
 
 static void lan743x_rfe_open(struct lan743x_adapter *adapter)
@@ -3079,6 +2870,322 @@ static int lan743x_rx_open(struct lan743x_rx *rx)
 	return ret;
 }
 
+static int lan743x_phylink_sgmii_config(struct lan743x_adapter *adapter)
+{
+	u32 sgmii_ctl;
+	int ret;
+
+	ret = lan743x_get_lsd(SPEED_1000, DUPLEX_FULL,
+			      MASTER_SLAVE_STATE_MASTER);
+	if (ret < 0) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "error %d link-speed-duplex(LSD) invalid\n", ret);
+		return ret;
+	}
+
+	adapter->sgmii_lsd = ret;
+	netif_dbg(adapter, drv, adapter->netdev,
+		  "Link Speed Duplex (lsd) : 0x%X\n", adapter->sgmii_lsd);
+
+	/* LINK_STATUS_SOURCE from the External PHY via SGMII */
+	sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
+	sgmii_ctl &= ~SGMII_CTL_LINK_STATUS_SOURCE_;
+	lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
+
+	ret = lan743x_serdes_clock_and_aneg_update(adapter);
+	if (ret < 0) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "error %d sgmii aneg update failed\n", ret);
+		return ret;
+	}
+
+	return lan743x_pcs_power_reset(adapter);
+}
+
+static int lan743x_phylink_1000basex_config(struct lan743x_adapter *adapter)
+{
+	u32 sgmii_ctl;
+	int ret;
+
+	ret = lan743x_get_lsd(SPEED_1000, DUPLEX_FULL,
+			      MASTER_SLAVE_STATE_MASTER);
+	if (ret < 0) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "error %d link-speed-duplex(LSD) invalid\n", ret);
+		return ret;
+	}
+
+	adapter->sgmii_lsd = ret;
+	netif_dbg(adapter, drv, adapter->netdev,
+		  "Link Speed Duplex (lsd) : 0x%X\n", adapter->sgmii_lsd);
+
+	/* LINK_STATUS_SOURCE from 1000BASE-X PCS link status */
+	sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
+	sgmii_ctl |= SGMII_CTL_LINK_STATUS_SOURCE_;
+	lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
+
+	ret = lan743x_serdes_clock_and_aneg_update(adapter);
+	if (ret < 0) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "error %d 1000basex aneg update failed\n", ret);
+		return ret;
+	}
+
+	return lan743x_pcs_power_reset(adapter);
+}
+
+static int lan743x_phylink_2500basex_config(struct lan743x_adapter *adapter)
+{
+	u32 sgmii_ctl;
+	int ret;
+
+	ret = lan743x_get_lsd(SPEED_2500, DUPLEX_FULL,
+			      MASTER_SLAVE_STATE_MASTER);
+	if (ret < 0) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "error %d link-speed-duplex(LSD) invalid\n", ret);
+		return ret;
+	}
+
+	adapter->sgmii_lsd = ret;
+	netif_dbg(adapter, drv, adapter->netdev,
+		  "Link Speed Duplex (lsd) : 0x%X\n", adapter->sgmii_lsd);
+
+	/* LINK_STATUS_SOURCE from 2500BASE-X PCS link status */
+	sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
+	sgmii_ctl |= SGMII_CTL_LINK_STATUS_SOURCE_;
+	lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
+
+	ret = lan743x_serdes_clock_and_aneg_update(adapter);
+	if (ret < 0) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "error %d 2500basex aneg update failed\n", ret);
+		return ret;
+	}
+
+	return lan743x_pcs_power_reset(adapter);
+}
+
+static void lan743x_phylink_mac_config(struct phylink_config *config,
+				       unsigned int link_an_mode,
+				       const struct phylink_link_state *state)
+{
+	struct net_device *netdev = to_net_dev(config->dev);
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int ret;
+
+	switch (state->interface) {
+	case PHY_INTERFACE_MODE_2500BASEX:
+		ret = lan743x_phylink_2500basex_config(adapter);
+		if (ret < 0)
+			netif_err(adapter, drv, adapter->netdev,
+				  "2500BASEX config failed. Error %d\n", ret);
+		else
+			netif_dbg(adapter, drv, adapter->netdev,
+				  "2500BASEX mode selected and configured\n");
+		break;
+	case PHY_INTERFACE_MODE_1000BASEX:
+		ret = lan743x_phylink_1000basex_config(adapter);
+		if (ret < 0)
+			netif_err(adapter, drv, adapter->netdev,
+				  "1000BASEX config failed. Error %d\n", ret);
+		else
+			netif_dbg(adapter, drv, adapter->netdev,
+				  "1000BASEX mode selected and configured\n");
+		break;
+	case PHY_INTERFACE_MODE_SGMII:
+		ret = lan743x_phylink_sgmii_config(adapter);
+		if (ret < 0)
+			netif_err(adapter, drv, adapter->netdev,
+				  "SGMII config failed. Error %d\n", ret);
+		else
+			netif_dbg(adapter, drv, adapter->netdev,
+				  "SGMII mode selected and configured\n");
+		break;
+	default:
+		netif_dbg(adapter, drv, adapter->netdev,
+			  "RGMII/GMII/MII(0x%X) mode enable\n", state->interface);
+		break;
+	}
+}
+
+static void lan743x_phylink_mac_link_down(struct phylink_config *config,
+					  unsigned int link_an_mode,
+					  phy_interface_t interface)
+{
+	netif_tx_stop_all_queues(to_net_dev(config->dev));
+}
+
+static void lan743x_phylink_mac_link_up(struct phylink_config *config,
+					struct phy_device *phydev,
+					unsigned int link_an_mode,
+					phy_interface_t interface,
+					int speed, int duplex,
+					bool tx_pause, bool rx_pause)
+{
+	struct net_device *netdev = to_net_dev(config->dev);
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int mac_cr;
+	u8 cap;
+
+	mac_cr = lan743x_csr_read(adapter, MAC_CR);
+	/* Pre-initialize register bits.
+	 * Resulting value corresponds to SPEED_10
+	 */
+	mac_cr &= ~(MAC_CR_CFG_H_ | MAC_CR_CFG_L_);
+	if (speed == SPEED_2500)
+		mac_cr |= MAC_CR_CFG_H_ | MAC_CR_CFG_L_;
+	else if (speed == SPEED_1000)
+		mac_cr |= MAC_CR_CFG_H_;
+	else if (speed == SPEED_100)
+		mac_cr |= MAC_CR_CFG_L_;
+
+	lan743x_csr_write(adapter, MAC_CR, mac_cr);
+
+	lan743x_ptp_update_latency(adapter, speed);
+
+	/* Flow Control operation */
+	cap = 0;
+	if (tx_pause)
+		cap |= FLOW_CTRL_TX;
+	if (rx_pause)
+		cap |= FLOW_CTRL_RX;
+
+	lan743x_mac_flow_ctrl_set_enables(adapter,
+					  cap & FLOW_CTRL_TX,
+					  cap & FLOW_CTRL_RX);
+
+	netif_tx_wake_all_queues(netdev);
+}
+
+static const struct phylink_mac_ops lan743x_phylink_mac_ops = {
+	.mac_config = lan743x_phylink_mac_config,
+	.mac_link_down = lan743x_phylink_mac_link_down,
+	.mac_link_up = lan743x_phylink_mac_link_up,
+};
+
+static int lan743x_phylink_create(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct phylink *pl;
+
+	adapter->phylink_config.dev = &netdev->dev;
+	adapter->phylink_config.type = PHYLINK_NETDEV;
+	adapter->phylink_config.mac_managed_pm = false;
+
+	adapter->phylink_config.mac_capabilities = MAC_ASYM_PAUSE |
+		MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD;
+
+	lan743x_phy_interface_select(adapter);
+
+	switch (adapter->phy_interface) {
+	case PHY_INTERFACE_MODE_SGMII:
+		__set_bit(PHY_INTERFACE_MODE_SGMII,
+			  adapter->phylink_config.supported_interfaces);
+		__set_bit(PHY_INTERFACE_MODE_1000BASEX,
+			  adapter->phylink_config.supported_interfaces);
+		__set_bit(PHY_INTERFACE_MODE_2500BASEX,
+			  adapter->phylink_config.supported_interfaces);
+		break;
+	case PHY_INTERFACE_MODE_GMII:
+		__set_bit(PHY_INTERFACE_MODE_GMII,
+			  adapter->phylink_config.supported_interfaces);
+		break;
+	case PHY_INTERFACE_MODE_MII:
+		__set_bit(PHY_INTERFACE_MODE_MII,
+			  adapter->phylink_config.supported_interfaces);
+		break;
+	default:
+		__set_bit(PHY_INTERFACE_MODE_RGMII,
+			  adapter->phylink_config.supported_interfaces);
+		__set_bit(PHY_INTERFACE_MODE_RGMII_ID,
+			  adapter->phylink_config.supported_interfaces);
+		__set_bit(PHY_INTERFACE_MODE_RGMII_RXID,
+			  adapter->phylink_config.supported_interfaces);
+		__set_bit(PHY_INTERFACE_MODE_RGMII_TXID,
+			  adapter->phylink_config.supported_interfaces);
+	}
+
+	pl = phylink_create(&adapter->phylink_config, NULL,
+			    adapter->phy_interface, &lan743x_phylink_mac_ops);
+
+	if (IS_ERR(pl)) {
+		netdev_err(netdev, "Could not create phylink (%pe)\n", pl);
+		return PTR_ERR(pl);
+	}
+
+	adapter->phylink = pl;
+	netdev_dbg(netdev, "lan743x phylink created");
+
+	return 0;
+}
+
+static bool lan743x_phy_handle_exists(struct device_node *dn)
+{
+	dn = of_parse_phandle(dn, "phy-handle", 0);
+	of_node_put(dn);
+	return dn != NULL;
+}
+
+static int lan743x_phylink_connect(struct lan743x_adapter *adapter)
+{
+	struct device_node *dn = adapter->pdev->dev.of_node;
+	struct net_device *dev = adapter->netdev;
+	struct fixed_phy_status fphy_status = {
+		.link = 1,
+		.speed = SPEED_1000,
+		.duplex = DUPLEX_FULL,
+	};
+	struct phy_device *phydev;
+	int ret;
+
+	if (dn)
+		ret = phylink_of_phy_connect(adapter->phylink, dn, 0);
+
+	if (!dn || (ret && !lan743x_phy_handle_exists(dn))) {
+		phydev = phy_find_first(adapter->mdiobus);
+		if (!phydev) {
+			if (((adapter->csr.id_rev & ID_REV_ID_MASK_) ==
+			      ID_REV_ID_LAN7431_) || adapter->is_pci11x1x) {
+				phydev = fixed_phy_register(PHY_POLL,
+							    &fphy_status,
+							    NULL);
+				if (IS_ERR(phydev)) {
+					netdev_err(dev, "No PHY/fixed_PHY found\n");
+					return PTR_ERR(phydev);
+				}
+			} else {
+				netdev_err(dev, "no PHY found\n");
+				return -ENXIO;
+			}
+		}
+
+		/* attach the mac to the phy */
+		ret = phylink_connect_phy(adapter->phylink, phydev);
+		if (ret) {
+			netdev_err(dev, "Could not attach PHY (%d)\n", ret);
+			return ret;
+		}
+	}
+
+	phylink_start(adapter->phylink);
+
+	return 0;
+}
+
+static void lan743x_phylink_disconnect(struct lan743x_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct phy_device *phydev = netdev->phydev;
+
+	phylink_stop(adapter->phylink);
+	phylink_disconnect_phy(adapter->phylink);
+
+	if (phydev)
+		if (phy_is_pseudo_fixed_link(phydev))
+			fixed_phy_unregister(phydev);
+}
+
 static int lan743x_netdev_close(struct net_device *netdev)
 {
 	struct lan743x_adapter *adapter = netdev_priv(netdev);
@@ -3092,7 +3199,7 @@ static int lan743x_netdev_close(struct net_device *netdev)
 
 	lan743x_ptp_close(adapter);
 
-	lan743x_phy_close(adapter);
+	lan743x_phylink_disconnect(adapter);
 
 	lan743x_mac_close(adapter);
 
@@ -3115,13 +3222,13 @@ static int lan743x_netdev_open(struct net_device *netdev)
 	if (ret)
 		goto close_intr;
 
-	ret = lan743x_phy_open(adapter);
+	ret = lan743x_phylink_connect(adapter);
 	if (ret)
-		goto close_mac;
+		goto close_phylink;
 
 	ret = lan743x_ptp_open(adapter);
 	if (ret)
-		goto close_phy;
+		goto close_phylink;
 
 	lan743x_rfe_open(adapter);
 
@@ -3162,10 +3269,8 @@ static int lan743x_netdev_open(struct net_device *netdev)
 	}
 	lan743x_ptp_close(adapter);
 
-close_phy:
-	lan743x_phy_close(adapter);
-
-close_mac:
+close_phylink:
+	lan743x_phylink_disconnect(adapter);
 	lan743x_mac_close(adapter);
 
 close_intr:
@@ -3192,11 +3297,14 @@ static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
 static int lan743x_netdev_ioctl(struct net_device *netdev,
 				struct ifreq *ifr, int cmd)
 {
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
 	if (!netif_running(netdev))
 		return -EINVAL;
 	if (cmd == SIOCSHWTSTAMP)
 		return lan743x_ptp_ioctl(netdev, ifr, cmd);
-	return phy_mii_ioctl(netdev->phydev, ifr, cmd);
+
+	return phylink_mii_ioctl(adapter->phylink, ifr, cmd);
 }
 
 static void lan743x_netdev_set_multicast(struct net_device *netdev)
@@ -3301,10 +3409,17 @@ static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
 	mdiobus_unregister(adapter->mdiobus);
 }
 
+static void lan743x_destroy_phylink(struct lan743x_adapter *adapter)
+{
+	phylink_destroy(adapter->phylink);
+	adapter->phylink = NULL;
+}
+
 static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
 {
 	unregister_netdev(adapter->netdev);
 
+	lan743x_destroy_phylink(adapter);
 	lan743x_mdiobus_cleanup(adapter);
 	lan743x_hardware_cleanup(adapter);
 	lan743x_pci_cleanup(adapter);
@@ -3518,14 +3633,21 @@ static int lan743x_pcidev_probe(struct pci_dev *pdev,
 				    NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
 	adapter->netdev->hw_features = adapter->netdev->features;
 
-	/* carrier off reporting is important to ethtool even BEFORE open */
-	netif_carrier_off(netdev);
+	ret = lan743x_phylink_create(adapter->netdev);
+	if (ret < 0) {
+		netif_err(adapter, probe, netdev,
+			  "failed to setup phylink (%d)\n", ret);
+		goto cleanup_mdiobus;
+	}
 
 	ret = register_netdev(adapter->netdev);
 	if (ret < 0)
-		goto cleanup_mdiobus;
+		goto cleanup_phylink;
 	return 0;
 
+cleanup_phylink:
+	lan743x_destroy_phylink(adapter);
+
 cleanup_mdiobus:
 	lan743x_mdiobus_cleanup(adapter);
 
@@ -3781,6 +3903,7 @@ static int lan743x_pm_resume(struct device *dev)
 	       MAC_WK_SRC_WK_FR_SAVED_;
 	lan743x_csr_write(adapter, MAC_WK_SRC, data);
 
+	rtnl_lock();
 	/* open netdev when netdev is at running state while resume.
 	 * For instance, it is true when system wakesup after pm-suspend
 	 * However, it is false when system wakes up after suspend GUI menu
@@ -3789,6 +3912,7 @@ static int lan743x_pm_resume(struct device *dev)
 		lan743x_netdev_open(netdev);
 
 	netif_device_attach(netdev);
+	rtnl_unlock();
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 3b2585a384e2..7f73d66854be 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -5,6 +5,7 @@
 #define _LAN743X_H
 
 #include <linux/phy.h>
+#include <linux/phylink.h>
 #include "lan743x_ptp.h"
 
 #define DRIVER_AUTHOR   "Bryan Whitehead <[email-masked]>"
@@ -1083,6 +1084,8 @@ struct lan743x_adapter {
 	u32			flags;
 	u32			hw_cfg;
 	phy_interface_t		phy_interface;
+	struct phylink		*phylink;
+	struct phylink_config	phylink_config;
 };
 
 #define LAN743X_COMPONENT_FLAG_RX(channel)  BIT(20 + (channel))
-- 
2.34.1