netdev - [PATCH net-next v4 3/4] net: mdio: of: export part of of_mdiobus_register

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Date:   Tue, 21 Apr 2020 14:52:18 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Marek Vasut <marex@...x.de>, David Jander <david@...tonic.nl>,
        devicetree@...r.kernel.org
Subject: [PATCH net-next v4 3/4] net: mdio: of: export part of of_mdiobus_register_phy()

This function will be needed in tja11xx driver for secondary PHY
support.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 drivers/of/of_mdio.c    | 73 ++++++++++++++++++++++++-----------------
 include/linux/of_mdio.h | 11 ++++++-
 2 files changed, 52 insertions(+), 32 deletions(-)

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 8270bbf505fb..d9e637b624ce 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -60,39 +60,15 @@ static struct mii_timestamper *of_find_mii_timestamper(struct device_node *node)
 	return register_mii_timestamper(arg.np, arg.args[0]);
 }
 
-static int of_mdiobus_register_phy(struct mii_bus *mdio,
-				    struct device_node *child, u32 addr)
+int __of_mdiobus_register_phy(struct mii_bus *mdio, struct phy_device *phy,
+			      struct device_node *child, u32 addr)
 {
-	struct mii_timestamper *mii_ts;
-	struct phy_device *phy;
-	bool is_c45;
 	int rc;
-	u32 phy_id;
-
-	mii_ts = of_find_mii_timestamper(child);
-	if (IS_ERR(mii_ts))
-		return PTR_ERR(mii_ts);
-
-	is_c45 = of_device_is_compatible(child,
-					 "ethernet-phy-ieee802.3-c45");
-
-	if (!is_c45 && !of_get_phy_id(child, &phy_id))
-		phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
-	else
-		phy = get_phy_device(mdio, addr, is_c45);
-	if (IS_ERR(phy)) {
-		if (mii_ts)
-			unregister_mii_timestamper(mii_ts);
-		return PTR_ERR(phy);
-	}
 
 	rc = of_irq_get(child, 0);
-	if (rc == -EPROBE_DEFER) {
-		if (mii_ts)
-			unregister_mii_timestamper(mii_ts);
-		phy_device_free(phy);
+	if (rc == -EPROBE_DEFER)
 		return rc;
-	}
+
 	if (rc > 0) {
 		phy->irq = rc;
 		mdio->irq[addr] = rc;
@@ -117,11 +93,48 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio,
 	/* All data is now stored in the phy struct;
 	 * register it */
 	rc = phy_device_register(phy);
+	if (rc) {
+		of_node_put(child);
+		return rc;
+	}
+
+	dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n",
+		child, addr);
+	return 0;
+}
+EXPORT_SYMBOL(__of_mdiobus_register_phy);
+
+static int of_mdiobus_register_phy(struct mii_bus *mdio,
+				    struct device_node *child, u32 addr)
+{
+	struct mii_timestamper *mii_ts;
+	struct phy_device *phy;
+	bool is_c45;
+	int rc;
+	u32 phy_id;
+
+	mii_ts = of_find_mii_timestamper(child);
+	if (IS_ERR(mii_ts))
+		return PTR_ERR(mii_ts);
+
+	is_c45 = of_device_is_compatible(child,
+					 "ethernet-phy-ieee802.3-c45");
+
+	if (!is_c45 && !of_get_phy_id(child, &phy_id))
+		phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
+	else
+		phy = get_phy_device(mdio, addr, is_c45);
+	if (IS_ERR(phy)) {
+		if (mii_ts)
+			unregister_mii_timestamper(mii_ts);
+		return PTR_ERR(phy);
+	}
+
+	rc = __of_mdiobus_register_phy(mdio, phy, child, addr);
 	if (rc) {
 		if (mii_ts)
 			unregister_mii_timestamper(mii_ts);
 		phy_device_free(phy);
-		of_node_put(child);
 		return rc;
 	}
 
@@ -132,8 +145,6 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio,
 	if (mii_ts)
 		phy->mii_ts = mii_ts;
 
-	dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n",
-		child, addr);
 	return 0;
 }
 
diff --git a/include/linux/of_mdio.h b/include/linux/of_mdio.h
index 491a2b7e77c1..b99e9f932002 100644
--- a/include/linux/of_mdio.h
+++ b/include/linux/of_mdio.h
@@ -30,7 +30,9 @@ extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
 extern int of_phy_register_fixed_link(struct device_node *np);
 extern void of_phy_deregister_fixed_link(struct device_node *np);
 extern bool of_phy_is_fixed_link(struct device_node *np);
-
+extern int __of_mdiobus_register_phy(struct mii_bus *mdio,
+				     struct phy_device *phy,
+				     struct device_node *child, u32 addr);
 
 static inline int of_mdio_parse_addr(struct device *dev,
 				     const struct device_node *np)
@@ -118,6 +120,13 @@ static inline bool of_phy_is_fixed_link(struct device_node *np)
 {
 	return false;
 }
+
+static inline int __of_mdiobus_register_phy(struct mii_bus *mdio,
+					    struct phy_device *phy,
+					    struct device_node *child, u32 addr)
+{
+	return -ENOSYS;
+}
 #endif
 
 
-- 
2.25.1