net: phylink, dsa: eliminate phylink_fixed_state_cb()

Move the callback into the phylink_config structure, rather than
providing a callback to set this up.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phylink.c

@@ -480,8 +480,8 @@ static void phylink_get_fixed_state(struct phylink *pl,
 				    struct phylink_link_state *state)
 {
 	*state = pl->link_config;
-	if (pl->get_fixed_state)
-		pl->get_fixed_state(pl->netdev, state);
+	if (pl->config->get_fixed_state)
+		pl->config->get_fixed_state(pl->config, state);
 	else if (pl->link_gpio)
 		state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
 
@@ -1044,32 +1044,6 @@ void phylink_disconnect_phy(struct phylink *pl)
 }
 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
 
-/**
- * phylink_fixed_state_cb() - allow setting a fixed link callback
- * @pl: a pointer to a &struct phylink returned from phylink_create()
- * @cb: callback to execute to determine the fixed link state.
- *
- * The MAC driver should call this driver when the state of its link
- * can be determined through e.g: an out of band MMIO register.
- */
-int phylink_fixed_state_cb(struct phylink *pl,
-			   void (*cb)(struct net_device *dev,
-				      struct phylink_link_state *state))
-{
-	/* It does not make sense to let the link be overriden unless we use
-	 * MLO_AN_FIXED
-	 */
-	if (pl->cfg_link_an_mode != MLO_AN_FIXED)
-		return -EINVAL;
-
-	mutex_lock(&pl->state_mutex);
-	pl->get_fixed_state = cb;
-	mutex_unlock(&pl->state_mutex);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(phylink_fixed_state_cb);
-
 /**
  * phylink_mac_change() - notify phylink of a change in MAC state
  * @pl: a pointer to a &struct phylink returned from phylink_create()
@@ -1106,6 +1080,8 @@ static irqreturn_t phylink_link_handler(int irq, void *data)
  */
 void phylink_start(struct phylink *pl)
 {
+	bool poll = false;
+
 	ASSERT_RTNL();
 
 	phylink_info(pl, "configuring for %s/%s link mode\n",
@@ -1142,10 +1118,18 @@ void phylink_start(struct phylink *pl)
 				irq = 0;
 		}
 		if (irq <= 0)
-			mod_timer(&pl->link_poll, jiffies + HZ);
+			poll = true;
+	}
+
+	switch (pl->cfg_link_an_mode) {
+	case MLO_AN_FIXED:
+		poll |= pl->config->poll_fixed_state;
+		break;
+	case MLO_AN_INBAND:
+		poll |= pl->config->pcs_poll;
+		break;
 	}
-	if ((pl->cfg_link_an_mode == MLO_AN_FIXED && pl->get_fixed_state) ||
-	    pl->config->pcs_poll)
+	if (poll)
 		mod_timer(&pl->link_poll, jiffies + HZ);
 	if (pl->phydev)
 		phy_start(pl->phydev);

include/linux/phylink.h

@@ -67,6 +67,9 @@ struct phylink_config {
 	struct device *dev;
 	enum phylink_op_type type;
 	bool pcs_poll;
+	bool poll_fixed_state;
+	void (*get_fixed_state)(struct phylink_config *config,
+				struct phylink_link_state *state);
 };
 
 /**
@@ -366,9 +369,6 @@ void phylink_destroy(struct phylink *);
 int phylink_connect_phy(struct phylink *, struct phy_device *);
 int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
 void phylink_disconnect_phy(struct phylink *);
-int phylink_fixed_state_cb(struct phylink *,
-			   void (*cb)(struct net_device *dev,
-				      struct phylink_link_state *));
 
 void phylink_mac_change(struct phylink *, bool up);
 

net/dsa/slave.c

@@ -1590,10 +1590,10 @@ void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
 }
 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
 
-static void dsa_slave_phylink_fixed_state(struct net_device *dev,
+static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
 					  struct phylink_link_state *state)
 {
-	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 	struct dsa_switch *ds = dp->ds;
 
 	/* No need to check that this operation is valid, the callback would
@@ -1633,6 +1633,15 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 	dp->pl_config.dev = &slave_dev->dev;
 	dp->pl_config.type = PHYLINK_NETDEV;
 
+	/* The get_fixed_state callback takes precedence over polling the
+	 * link GPIO in PHYLINK (see phylink_get_fixed_state).  Only set
+	 * this if the switch provides such a callback.
+	 */
+	if (ds->ops->phylink_fixed_state) {
+		dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
+		dp->pl_config.poll_fixed_state = true;
+	}
+
 	dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
 				&dsa_port_phylink_mac_ops);
 	if (IS_ERR(dp->pl)) {
@@ -1641,13 +1650,6 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 		return PTR_ERR(dp->pl);
 	}
 
-	/* Register only if the switch provides such a callback, since this
-	 * callback takes precedence over polling the link GPIO in PHYLINK
-	 * (see phylink_get_fixed_state).
-	 */
-	if (ds->ops->phylink_fixed_state)
-		phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
-
 	if (ds->ops->get_phy_flags)
 		phy_flags = ds->ops->get_phy_flags(ds, dp->index);