Merge branch 'net-dsa-adjust_link-removal'

Florian Fainelli says:

====================
net: dsa: adjust_link removal

Now that the last in-tree driver (b53) has been converted to PHYLINK, we
can get rid of all of code that catered to working with drivers
implementing only PHYLIB's adjust_link callback.
====================

Link: https://lore.kernel.org/r/20240430164816.2400606-1-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

include/net/dsa.h

@@ -24,9 +24,6 @@
 
 struct dsa_8021q_context;
 struct tc_action;
-struct phy_device;
-struct fixed_phy_status;
-struct phylink_link_state;
 
 #define DSA_TAG_PROTO_NONE_VALUE		0
 #define DSA_TAG_PROTO_BRCM_VALUE		1
@@ -868,14 +865,6 @@ struct dsa_switch_ops {
 	int	(*phy_write)(struct dsa_switch *ds, int port,
 			     int regnum, u16 val);
 
-	/*
-	 * Link state adjustment (called from libphy)
-	 */
-	void	(*adjust_link)(struct dsa_switch *ds, int port,
-				struct phy_device *phydev);
-	void	(*fixed_link_update)(struct dsa_switch *ds, int port,
-				struct fixed_phy_status *st);
-
 	/*
 	 * PHYLINK integration
 	 */

net/dsa/dsa.c

@@ -1511,8 +1511,7 @@ static int dsa_switch_probe(struct dsa_switch *ds)
 		    ds->ops->phylink_mac_config ||
 		    ds->ops->phylink_mac_finish ||
 		    ds->ops->phylink_mac_link_down ||
-		    ds->ops->phylink_mac_link_up ||
-		    ds->ops->adjust_link)
+		    ds->ops->phylink_mac_link_up)
 			return -EINVAL;
 	}
 

net/dsa/port.c

@@ -1535,25 +1535,6 @@ void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
 	cpu_dp->tag_ops = tag_ops;
 }
 
-static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
-{
-	struct device_node *phy_dn;
-	struct phy_device *phydev;
-
-	phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
-	if (!phy_dn)
-		return NULL;
-
-	phydev = of_phy_find_device(phy_dn);
-	if (!phydev) {
-		of_node_put(phy_dn);
-		return ERR_PTR(-EPROBE_DEFER);
-	}
-
-	of_node_put(phy_dn);
-	return phydev;
-}
-
 static struct phylink_pcs *
 dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
 				phy_interface_t interface)
@@ -1616,17 +1597,10 @@ static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
 					   phy_interface_t interface)
 {
 	struct dsa_port *dp = dsa_phylink_to_port(config);
-	struct phy_device *phydev = NULL;
 	struct dsa_switch *ds = dp->ds;
 
-	if (dsa_port_is_user(dp))
-		phydev = dp->user->phydev;
-
-	if (!ds->ops->phylink_mac_link_down) {
-		if (ds->ops->adjust_link && phydev)
-			ds->ops->adjust_link(ds, dp->index, phydev);
+	if (!ds->ops->phylink_mac_link_down)
 		return;
-	}
 
 	ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
 }
@@ -1641,11 +1615,8 @@ static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
 	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct dsa_switch *ds = dp->ds;
 
-	if (!ds->ops->phylink_mac_link_up) {
-		if (ds->ops->adjust_link && phydev)
-			ds->ops->adjust_link(ds, dp->index, phydev);
+	if (!ds->ops->phylink_mac_link_up)
 		return;
-	}
 
 	ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
 				     speed, duplex, tx_pause, rx_pause);
@@ -1708,78 +1679,6 @@ void dsa_port_phylink_destroy(struct dsa_port *dp)
 	dp->pl = NULL;
 }
 
-static int dsa_shared_port_setup_phy_of(struct dsa_port *dp, bool enable)
-{
-	struct dsa_switch *ds = dp->ds;
-	struct phy_device *phydev;
-	int port = dp->index;
-	int err = 0;
-
-	phydev = dsa_port_get_phy_device(dp);
-	if (!phydev)
-		return 0;
-
-	if (IS_ERR(phydev))
-		return PTR_ERR(phydev);
-
-	if (enable) {
-		err = genphy_resume(phydev);
-		if (err < 0)
-			goto err_put_dev;
-
-		err = genphy_read_status(phydev);
-		if (err < 0)
-			goto err_put_dev;
-	} else {
-		err = genphy_suspend(phydev);
-		if (err < 0)
-			goto err_put_dev;
-	}
-
-	if (ds->ops->adjust_link)
-		ds->ops->adjust_link(ds, port, phydev);
-
-	dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
-
-err_put_dev:
-	put_device(&phydev->mdio.dev);
-	return err;
-}
-
-static int dsa_shared_port_fixed_link_register_of(struct dsa_port *dp)
-{
-	struct device_node *dn = dp->dn;
-	struct dsa_switch *ds = dp->ds;
-	struct phy_device *phydev;
-	int port = dp->index;
-	phy_interface_t mode;
-	int err;
-
-	err = of_phy_register_fixed_link(dn);
-	if (err) {
-		dev_err(ds->dev,
-			"failed to register the fixed PHY of port %d\n",
-			port);
-		return err;
-	}
-
-	phydev = of_phy_find_device(dn);
-
-	err = of_get_phy_mode(dn, &mode);
-	if (err)
-		mode = PHY_INTERFACE_MODE_NA;
-	phydev->interface = mode;
-
-	genphy_read_status(phydev);
-
-	if (ds->ops->adjust_link)
-		ds->ops->adjust_link(ds, port, phydev);
-
-	put_device(&phydev->mdio.dev);
-
-	return 0;
-}
-
 static int dsa_shared_port_phylink_register(struct dsa_port *dp)
 {
 	struct dsa_switch *ds = dp->ds;
@@ -1983,44 +1882,28 @@ int dsa_shared_port_link_register_of(struct dsa_port *dp)
 					dsa_switches_apply_workarounds))
 		return -EINVAL;
 
-	if (!ds->ops->adjust_link) {
-		if (missing_link_description) {
-			dev_warn(ds->dev,
-				 "Skipping phylink registration for %s port %d\n",
-				 dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
-		} else {
-			dsa_shared_port_link_down(dp);
+	if (missing_link_description) {
+		dev_warn(ds->dev,
+			 "Skipping phylink registration for %s port %d\n",
+			 dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+	} else {
+		dsa_shared_port_link_down(dp);
 
-			return dsa_shared_port_phylink_register(dp);
-		}
-		return 0;
+		return dsa_shared_port_phylink_register(dp);
 	}
 
-	dev_warn(ds->dev,
-		 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
-
-	if (of_phy_is_fixed_link(dp->dn))
-		return dsa_shared_port_fixed_link_register_of(dp);
-	else
-		return dsa_shared_port_setup_phy_of(dp, true);
+	return 0;
 }
 
 void dsa_shared_port_link_unregister_of(struct dsa_port *dp)
 {
-	struct dsa_switch *ds = dp->ds;
-
-	if (!ds->ops->adjust_link && dp->pl) {
+	if (dp->pl) {
 		rtnl_lock();
 		phylink_disconnect_phy(dp->pl);
 		rtnl_unlock();
 		dsa_port_phylink_destroy(dp);
 		return;
 	}
-
-	if (of_phy_is_fixed_link(dp->dn))
-		of_phy_deregister_fixed_link(dp->dn);
-	else
-		dsa_shared_port_setup_phy_of(dp, false);
 }
 
 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr,