net: ethernet: ti: am65-cpsw: Convert to PHYLINK

Convert am65-cpsw driver and am65-cpsw ethtool to use Phylink APIs
as described at Documentation/networking/sfp-phylink.rst. All calls
to Phy APIs are replaced with their equivalent Phylink APIs.

No functional change intended. Use Phylink instead of conventional
Phylib, in preparation to add support for SGMII/QSGMII modes.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/am65-cpsw-ethtool.c

@@ -6,7 +6,7 @@
  */
 
 #include <linux/net_tstamp.h>
-#include <linux/phy.h>
+#include <linux/phylink.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
@@ -471,63 +471,39 @@ static void am65_cpsw_get_pauseparam(struct net_device *ndev,
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- pause->autoneg = AUTONEG_DISABLE;
- pause->rx_pause = salve->rx_pause ? true : false;
- pause->tx_pause = salve->tx_pause ? true : false;
+ phylink_ethtool_get_pauseparam(salve->phylink, pause);
 }
 
 static int am65_cpsw_set_pauseparam(struct net_device *ndev,
  struct ethtool_pauseparam *pause)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy)
- return -EINVAL;
-
- if (!phy_validate_pause(salve->phy, pause))
- return -EINVAL;
-
- salve->rx_pause = pause->rx_pause ? true : false;
- salve->tx_pause = pause->tx_pause ? true : false;
-
- phy_set_asym_pause(salve->phy, salve->rx_pause, salve->tx_pause);
-
- return 0;
+ return phylink_ethtool_set_pauseparam(salve->phylink, pause);
 }
 
 static void am65_cpsw_get_wol(struct net_device *ndev,
  struct ethtool_wolinfo *wol)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- wol->supported = 0;
- wol->wolopts = 0;
-
- if (salve->phy)
- phy_ethtool_get_wol(salve->phy, wol);
+ phylink_ethtool_get_wol(salve->phylink, wol);
 }
 
 static int am65_cpsw_set_wol(struct net_device *ndev,
  struct ethtool_wolinfo *wol)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy)
- return -EOPNOTSUPP;
-
- return phy_ethtool_set_wol(salve->phy, wol);
+ return phylink_ethtool_set_wol(salve->phylink, wol);
 }
 
 static int am65_cpsw_get_link_ksettings(struct net_device *ndev,
  struct ethtool_link_ksettings *ecmd)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy)
- return -EOPNOTSUPP;
-
- phy_ethtool_ksettings_get(salve->phy, ecmd);
- return 0;
+ return phylink_ethtool_ksettings_get(salve->phylink, ecmd);
 }
 
 static int
@@ -536,40 +512,28 @@ am65_cpsw_set_link_ksettings(struct net_device *ndev,
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy || phy_is_pseudo_fixed_link(salve->phy))
- return -EOPNOTSUPP;
-
- return phy_ethtool_ksettings_set(salve->phy, ecmd);
+ return phylink_ethtool_ksettings_set(salve->phylink, ecmd);
 }
 
 static int am65_cpsw_get_eee(struct net_device *ndev, struct ethtool_eee *edata)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy || phy_is_pseudo_fixed_link(salve->phy))
- return -EOPNOTSUPP;
-
- return phy_ethtool_get_eee(salve->phy, edata);
+ return phylink_ethtool_get_eee(salve->phylink, edata);
 }
 
 static int am65_cpsw_set_eee(struct net_device *ndev, struct ethtool_eee *edata)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy || phy_is_pseudo_fixed_link(salve->phy))
- return -EOPNOTSUPP;
-
- return phy_ethtool_set_eee(salve->phy, edata);
+ return phylink_ethtool_set_eee(salve->phylink, edata);
 }
 
 static int am65_cpsw_nway_reset(struct net_device *ndev)
 {
  struct am65_cpsw_slave_data *salve = am65_ndev_to_slave(ndev);
 
- if (!salve->phy || phy_is_pseudo_fixed_link(salve->phy))
- return -EOPNOTSUPP;
-
- return phy_restart_aneg(salve->phy);
+ return phylink_ethtool_nway_reset(salve->phylink);
 }
 
 static int am65_cpsw_get_regs_len(struct net_device *ndev)