linux-kernel - [net-next: PATCH v3 7/8] net: mdio: introduce fwnode_mdiobus_register

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Date:   Wed, 27 Jul 2022 08:43:20 +0200
From:   Marcin Wojtas <mw@...ihalf.com>
To:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        netdev@...r.kernel.org
Cc:     rafael@...nel.org, andriy.shevchenko@...ux.intel.com,
        sean.wang@...iatek.com, Landen.Chao@...iatek.com,
        linus.walleij@...aro.org, andrew@...n.ch, vivien.didelot@...il.com,
        f.fainelli@...il.com, olteanv@...il.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        linux@...linux.org.uk, hkallweit1@...il.com, gjb@...ihalf.com,
        mw@...ihalf.com, jaz@...ihalf.com, tn@...ihalf.com,
        Samer.El-Haj-Mahmoud@....com, upstream@...ihalf.com
Subject: [net-next: PATCH v3 7/8] net: mdio: introduce fwnode_mdiobus_register_device()

As a preparation patch to extend MDIO capabilities in the ACPI world,
introduce fwnode_mdiobus_register_device() to register non-PHY
devices on the mdiobus.

Use the newly introduced routine instead of of_mdiobus_register_device().

Signed-off-by: Marcin Wojtas <mw@...ihalf.com>
---
 include/linux/fwnode_mdio.h    |  3 ++
 drivers/net/mdio/fwnode_mdio.c | 29 ++++++++++++++++++
 drivers/net/mdio/of_mdio.c     | 32 +-------------------
 3 files changed, 33 insertions(+), 31 deletions(-)

diff --git a/include/linux/fwnode_mdio.h b/include/linux/fwnode_mdio.h
index 98755b8c6c8a..39d74c5d1bb0 100644
--- a/include/linux/fwnode_mdio.h
+++ b/include/linux/fwnode_mdio.h
@@ -16,6 +16,9 @@ int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
 int fwnode_mdiobus_register_phy(struct mii_bus *bus,
 				struct fwnode_handle *child, u32 addr);
 
+int fwnode_mdiobus_register_device(struct mii_bus *mdio,
+				   struct fwnode_handle *child, u32 addr);
+
 int fwnode_phy_register_fixed_link(struct fwnode_handle *fwnode);
 
 void fwnode_phy_deregister_fixed_link(struct fwnode_handle *fwnode);
diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c
index 454fdae24150..3743f34e7c2d 100644
--- a/drivers/net/mdio/fwnode_mdio.c
+++ b/drivers/net/mdio/fwnode_mdio.c
@@ -149,6 +149,35 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
 }
 EXPORT_SYMBOL(fwnode_mdiobus_register_phy);
 
+int fwnode_mdiobus_register_device(struct mii_bus *mdio,
+				   struct fwnode_handle *child, u32 addr)
+{
+	struct mdio_device *mdiodev;
+	int rc;
+
+	mdiodev = mdio_device_create(mdio, addr);
+	if (IS_ERR(mdiodev))
+		return PTR_ERR(mdiodev);
+
+	/* Associate the fwnode with the device structure so it
+	 * can be looked up later.
+	 */
+	device_set_node(&mdiodev->dev, child);
+
+	/* All data is now stored in the mdiodev struct; register it. */
+	rc = mdio_device_register(mdiodev);
+	if (rc) {
+		mdio_device_free(mdiodev);
+		fwnode_handle_put(child);
+		return rc;
+	}
+
+	dev_dbg(&mdio->dev, "registered mdio device %p fwnode at address %i\n",
+		child, addr);
+	return 0;
+}
+EXPORT_SYMBOL(fwnode_mdiobus_register_device);
+
 /*
  * fwnode_phy_is_fixed_link() and fwnode_phy_register_fixed_link() must
  * support two bindings:
diff --git a/drivers/net/mdio/of_mdio.c b/drivers/net/mdio/of_mdio.c
index 409da6e92f7d..bd941da030bb 100644
--- a/drivers/net/mdio/of_mdio.c
+++ b/drivers/net/mdio/of_mdio.c
@@ -48,36 +48,6 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio,
 	return fwnode_mdiobus_register_phy(mdio, of_fwnode_handle(child), addr);
 }
 
-static int of_mdiobus_register_device(struct mii_bus *mdio,
-				      struct device_node *child, u32 addr)
-{
-	struct fwnode_handle *fwnode = of_fwnode_handle(child);
-	struct mdio_device *mdiodev;
-	int rc;
-
-	mdiodev = mdio_device_create(mdio, addr);
-	if (IS_ERR(mdiodev))
-		return PTR_ERR(mdiodev);
-
-	/* Associate the OF node with the device structure so it
-	 * can be looked up later.
-	 */
-	fwnode_handle_get(fwnode);
-	device_set_node(&mdiodev->dev, fwnode);
-
-	/* All data is now stored in the mdiodev struct; register it. */
-	rc = mdio_device_register(mdiodev);
-	if (rc) {
-		mdio_device_free(mdiodev);
-		of_node_put(child);
-		return rc;
-	}
-
-	dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",
-		child, addr);
-	return 0;
-}
-
 /* The following is a list of PHY compatible strings which appear in
  * some DTBs. The compatible string is never matched against a PHY
  * driver, so is pointless. We only expect devices which are not PHYs
@@ -186,7 +156,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 		if (of_mdiobus_child_is_phy(child))
 			rc = of_mdiobus_register_phy(mdio, child, addr);
 		else
-			rc = of_mdiobus_register_device(mdio, child, addr);
+			rc = fwnode_mdiobus_register_device(mdio, of_fwnode_handle(child), addr);
 
 		if (rc == -ENODEV)
 			dev_err(&mdio->dev,
-- 
2.29.0