netdev - [net-next PATCH v4 2/6] net: phy: introduce device_mdiobus

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Message-Id: <20200709175722.5228-3-calvin.johnson@oss.nxp.com>
Date:   Thu,  9 Jul 2020 23:27:18 +0530
From:   Calvin Johnson <calvin.johnson@....nxp.com>
To:     Jeremy Linton <jeremy.linton@....com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Jon <jon@...id-run.com>,
        Cristi Sovaiala <cristian.sovaiala@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Madalin Bucur <madalin.bucur@....nxp.com>
Cc:     linux-acpi@...r.kernel.org, linux.cj@...il.com,
        netdev@...r.kernel.org, Calvin Johnson <calvin.johnson@....nxp.com>
Subject: [net-next PATCH v4 2/6] net: phy: introduce device_mdiobus_register()

Introduce device_mdiobus_register() to register mdiobus
in cases of either DT or ACPI.

Signed-off-by: Calvin Johnson <calvin.johnson@....nxp.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 drivers/net/phy/mdio_bus.c | 22 ++++++++++++++++++++++
 include/linux/mdio.h       |  1 +
 2 files changed, 23 insertions(+)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 46b33701ad4b..3c2749e84f74 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -501,6 +501,28 @@ static int mdiobus_create_device(struct mii_bus *bus,
 	return ret;
 }
 
+/**
+ * device_mdiobus_register - bring up all the PHYs on a given bus and
+ * attach them to bus. This handles both DT and ACPI methods.
+ * @bus: target mii_bus
+ * @dev: given MDIO device
+ *
+ * Returns 0 on success or < 0 on error.
+ */
+int device_mdiobus_register(struct mii_bus *bus,
+			    struct device *dev)
+{
+	if (dev->of_node) {
+		return of_mdiobus_register(bus, dev->of_node);
+	} else if (dev_fwnode(dev)) {
+		bus->dev.fwnode = dev_fwnode(dev);
+		return mdiobus_register(bus);
+	} else {
+		return -ENODEV;
+	}
+}
+EXPORT_SYMBOL(device_mdiobus_register);
+
 /**
  * __mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
  * @bus: target mii_bus
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 898cbf00332a..f78c6a7f8eb7 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -358,6 +358,7 @@ static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
 	return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
 }
 
+int device_mdiobus_register(struct mii_bus *bus, struct device *dev);
 int mdiobus_register_device(struct mdio_device *mdiodev);
 int mdiobus_unregister_device(struct mdio_device *mdiodev);
 bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
-- 
2.17.1