diff --git a/MAINTAINERS b/MAINTAINERS
index 297e610c9163a..7d72fdbed6e65 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5140,6 +5140,7 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	include/linux/phy.h
 F:	include/linux/phy_fixed.h
+F:	include/linux/platform_data/mdio-bcm-unimac.h
 F:	drivers/net/phy/
 F:	Documentation/networking/phy.txt
 F:	drivers/of/of_mdio.c
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index 285f8bc256828..ec7a798c6bd13 100644
--- a/drivers/net/ethernet/broadcom/Kconfig
+++ b/drivers/net/ethernet/broadcom/Kconfig
@@ -65,6 +65,7 @@ config BCMGENET
 	select PHYLIB
 	select FIXED_PHY
 	select BCM7XXX_PHY
+	select MDIO_BCM_UNIMAC
 	help
 	  This driver supports the built-in Ethernet MACs found in the
 	  Broadcom BCM7xxx Set Top Box family chipset.
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
index b9344de669f84..4775999ee016e 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
@@ -657,6 +657,7 @@ struct bcmgenet_priv {
 
 	struct clk *clk;
 	struct platform_device *pdev;
+	struct platform_device *mii_pdev;
 
 	/* WOL */
 	struct clk *clk_wol;
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 071fcbd14e6a4..33d3f60ac74bb 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -24,62 +24,10 @@
 #include <linux/of_net.h>
 #include <linux/of_mdio.h>
 #include <linux/platform_data/bcmgenet.h>
+#include <linux/platform_data/mdio-bcm-unimac.h>
 
 #include "bcmgenet.h"
 
-/* read a value from the MII */
-static int bcmgenet_mii_read(struct mii_bus *bus, int phy_id, int location)
-{
-	int ret;
-	struct net_device *dev = bus->priv;
-	struct bcmgenet_priv *priv = netdev_priv(dev);
-	u32 reg;
-
-	bcmgenet_umac_writel(priv, (MDIO_RD | (phy_id << MDIO_PMD_SHIFT) |
-			     (location << MDIO_REG_SHIFT)), UMAC_MDIO_CMD);
-	/* Start MDIO transaction*/
-	reg = bcmgenet_umac_readl(priv, UMAC_MDIO_CMD);
-	reg |= MDIO_START_BUSY;
-	bcmgenet_umac_writel(priv, reg, UMAC_MDIO_CMD);
-	wait_event_timeout(priv->wq,
-			   !(bcmgenet_umac_readl(priv, UMAC_MDIO_CMD)
-			   & MDIO_START_BUSY),
-			   HZ / 100);
-	ret = bcmgenet_umac_readl(priv, UMAC_MDIO_CMD);
-
-	/* Some broken devices are known not to release the line during
-	 * turn-around, e.g: Broadcom BCM53125 external switches, so check for
-	 * that condition here and ignore the MDIO controller read failure
-	 * indication.
-	 */
-	if (!(bus->phy_ignore_ta_mask & 1 << phy_id) && (ret & MDIO_READ_FAIL))
-		return -EIO;
-
-	return ret & 0xffff;
-}
-
-/* write a value to the MII */
-static int bcmgenet_mii_write(struct mii_bus *bus, int phy_id,
-			      int location, u16 val)
-{
-	struct net_device *dev = bus->priv;
-	struct bcmgenet_priv *priv = netdev_priv(dev);
-	u32 reg;
-
-	bcmgenet_umac_writel(priv, (MDIO_WR | (phy_id << MDIO_PMD_SHIFT) |
-			     (location << MDIO_REG_SHIFT) | (0xffff & val)),
-			     UMAC_MDIO_CMD);
-	reg = bcmgenet_umac_readl(priv, UMAC_MDIO_CMD);
-	reg |= MDIO_START_BUSY;
-	bcmgenet_umac_writel(priv, reg, UMAC_MDIO_CMD);
-	wait_event_timeout(priv->wq,
-			   !(bcmgenet_umac_readl(priv, UMAC_MDIO_CMD) &
-			   MDIO_START_BUSY),
-			   HZ / 100);
-
-	return 0;
-}
-
 /* setup netdev link state when PHY link status change and
  * update UMAC and RGMII block when link up
  */
@@ -392,104 +340,121 @@ int bcmgenet_mii_probe(struct net_device *dev)
 	return 0;
 }
 
-/* Workaround for integrated BCM7xxx Gigabit PHYs which have a problem with
- * their internal MDIO management controller making them fail to successfully
- * be read from or written to for the first transaction.  We insert a dummy
- * BMSR read here to make sure that phy_get_device() and get_phy_id() can
- * correctly read the PHY MII_PHYSID1/2 registers and successfully register a
- * PHY device for this peripheral.
- *
- * Once the PHY driver is registered, we can workaround subsequent reads from
- * there (e.g: during system-wide power management).
- *
- * bus->reset is invoked before mdiobus_scan during mdiobus_register and is
- * therefore the right location to stick that workaround. Since we do not want
- * to read from non-existing PHYs, we either use bus->phy_mask or do a manual
- * Device Tree scan to limit the search area.
- */
-static int bcmgenet_mii_bus_reset(struct mii_bus *bus)
+static struct device_node *bcmgenet_mii_of_find_mdio(struct bcmgenet_priv *priv)
 {
-	struct net_device *dev = bus->priv;
-	struct bcmgenet_priv *priv = netdev_priv(dev);
-	struct device_node *np = priv->mdio_dn;
-	struct device_node *child = NULL;
-	u32 read_mask = 0;
-	int addr = 0;
+	struct device_node *dn = priv->pdev->dev.of_node;
+	struct device *kdev = &priv->pdev->dev;
+	char *compat;
 
-	if (!np) {
-		read_mask = 1 << priv->phy_addr;
-	} else {
-		for_each_available_child_of_node(np, child) {
-			addr = of_mdio_parse_addr(&dev->dev, child);
-			if (addr < 0)
-				continue;
+	compat = kasprintf(GFP_KERNEL, "brcm,genet-mdio-v%d", priv->version);
+	if (!compat)
+		return NULL;
 
-			read_mask |= 1 << addr;
-		}
+	priv->mdio_dn = of_find_compatible_node(dn, NULL, compat);
+	kfree(compat);
+	if (!priv->mdio_dn) {
+		dev_err(kdev, "unable to find MDIO bus node\n");
+		return NULL;
 	}
 
-	for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
-		if (read_mask & 1 << addr) {
-			dev_dbg(&dev->dev, "Workaround for PHY @ %d\n", addr);
-			mdiobus_read(bus, addr, MII_BMSR);
-		}
+	return priv->mdio_dn;
+}
+
+static void bcmgenet_mii_pdata_init(struct bcmgenet_priv *priv,
+				    struct unimac_mdio_pdata *ppd)
+{
+	struct device *kdev = &priv->pdev->dev;
+	struct bcmgenet_platform_data *pd = kdev->platform_data;
+
+	if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {
+		/*
+		 * Internal or external PHY with MDIO access
+		 */
+		if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)
+			ppd->phy_mask = 1 << pd->phy_address;
+		else
+			ppd->phy_mask = 0;
 	}
+}
 
+static int bcmgenet_mii_wait(void *wait_func_data)
+{
+	struct bcmgenet_priv *priv = wait_func_data;
+
+	wait_event_timeout(priv->wq,
+			   !(bcmgenet_umac_readl(priv, UMAC_MDIO_CMD)
+			   & MDIO_START_BUSY),
+			   HZ / 100);
 	return 0;
 }
 
-static int bcmgenet_mii_alloc(struct bcmgenet_priv *priv)
+static int bcmgenet_mii_register(struct bcmgenet_priv *priv)
 {
-	struct mii_bus *bus;
+	struct platform_device *pdev = priv->pdev;
+	struct bcmgenet_platform_data *pdata = pdev->dev.platform_data;
+	struct device_node *dn = pdev->dev.of_node;
+	struct unimac_mdio_pdata ppd;
+	struct platform_device *ppdev;
+	struct resource *pres, res;
+	int id, ret;
+
+	pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	memset(&res, 0, sizeof(res));
+	memset(&ppd, 0, sizeof(ppd));
+
+	ppd.wait_func = bcmgenet_mii_wait;
+	ppd.wait_func_data = priv;
+	ppd.bus_name = "bcmgenet MII bus";
+
+	/* Unimac MDIO bus controller starts at UniMAC offset + MDIO_CMD
+	 * and is 2 * 32-bits word long, 8 bytes total.
+	 */
+	res.start = pres->start + GENET_UMAC_OFF + UMAC_MDIO_CMD;
+	res.end = res.start + 8;
+	res.flags = IORESOURCE_MEM;
 
-	if (priv->mii_bus)
-		return 0;
+	if (dn)
+		id = of_alias_get_id(dn, "eth");
+	else
+		id = pdev->id;
 
-	priv->mii_bus = mdiobus_alloc();
-	if (!priv->mii_bus) {
-		pr_err("failed to allocate\n");
+	ppdev = platform_device_alloc(UNIMAC_MDIO_DRV_NAME, id);
+	if (!ppdev)
 		return -ENOMEM;
-	}
 
-	bus = priv->mii_bus;
-	bus->priv = priv->dev;
-	bus->name = "bcmgenet MII bus";
-	bus->parent = &priv->pdev->dev;
-	bus->read = bcmgenet_mii_read;
-	bus->write = bcmgenet_mii_write;
-	bus->reset = bcmgenet_mii_bus_reset;
-	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d",
-		 priv->pdev->name, priv->pdev->id);
+	/* Retain this platform_device pointer for later cleanup */
+	priv->mii_pdev = ppdev;
+	ppdev->dev.parent = &pdev->dev;
+	ppdev->dev.of_node = bcmgenet_mii_of_find_mdio(priv);
+	if (pdata)
+		bcmgenet_mii_pdata_init(priv, &ppd);
+
+	ret = platform_device_add_resources(ppdev, &res, 1);
+	if (ret)
+		goto out;
+
+	ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd));
+	if (ret)
+		goto out;
+
+	ret = platform_device_add(ppdev);
+	if (ret)
+		goto out;
 
 	return 0;
+out:
+	platform_device_put(ppdev);
+	return ret;
 }
 
 static int bcmgenet_mii_of_init(struct bcmgenet_priv *priv)
 {
 	struct device_node *dn = priv->pdev->dev.of_node;
 	struct device *kdev = &priv->pdev->dev;
-	struct phy_device *phydev = NULL;
-	char *compat;
+	struct phy_device *phydev;
 	int phy_mode;
 	int ret;
 
-	compat = kasprintf(GFP_KERNEL, "brcm,genet-mdio-v%d", priv->version);
-	if (!compat)
-		return -ENOMEM;
-
-	priv->mdio_dn = of_find_compatible_node(dn, NULL, compat);
-	kfree(compat);
-	if (!priv->mdio_dn) {
-		dev_err(kdev, "unable to find MDIO bus node\n");
-		return -ENODEV;
-	}
-
-	ret = of_mdiobus_register(priv->mii_bus, priv->mdio_dn);
-	if (ret) {
-		dev_err(kdev, "failed to register MDIO bus\n");
-		return ret;
-	}
-
 	/* Fetch the PHY phandle */
 	priv->phy_dn = of_parse_phandle(dn, "phy-handle", 0);
 
@@ -536,33 +501,23 @@ static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv)
 {
 	struct device *kdev = &priv->pdev->dev;
 	struct bcmgenet_platform_data *pd = kdev->platform_data;
-	struct mii_bus *mdio = priv->mii_bus;
+	char phy_name[MII_BUS_ID_SIZE + 3];
+	char mdio_bus_id[MII_BUS_ID_SIZE];
 	struct phy_device *phydev;
-	int ret;
+
+	snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d",
+		 UNIMAC_MDIO_DRV_NAME, priv->pdev->id);
 
 	if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {
+		snprintf(phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT,
+			 mdio_bus_id, pd->phy_address);
+
 		/*
 		 * Internal or external PHY with MDIO access
 		 */
-		if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)
-			mdio->phy_mask = ~(1 << pd->phy_address);
-		else
-			mdio->phy_mask = 0;
-
-		ret = mdiobus_register(mdio);
-		if (ret) {
-			dev_err(kdev, "failed to register MDIO bus\n");
-			return ret;
-		}
-
-		if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)
-			phydev = mdiobus_get_phy(mdio, pd->phy_address);
-		else
-			phydev = phy_find_first(mdio);
-
+		phydev = phy_attach(priv->dev, phy_name, pd->phy_interface);
 		if (!phydev) {
 			dev_err(kdev, "failed to register PHY device\n");
-			mdiobus_unregister(mdio);
 			return -ENODEV;
 		}
 	} else {
@@ -608,10 +563,9 @@ static int bcmgenet_mii_bus_init(struct bcmgenet_priv *priv)
 int bcmgenet_mii_init(struct net_device *dev)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
-	struct device_node *dn = priv->pdev->dev.of_node;
 	int ret;
 
-	ret = bcmgenet_mii_alloc(priv);
+	ret = bcmgenet_mii_register(priv);
 	if (ret)
 		return ret;
 
@@ -622,11 +576,7 @@ int bcmgenet_mii_init(struct net_device *dev)
 	return 0;
 
 out:
-	if (of_phy_is_fixed_link(dn))
-		of_phy_deregister_fixed_link(dn);
-	of_node_put(priv->phy_dn);
-	mdiobus_unregister(priv->mii_bus);
-	mdiobus_free(priv->mii_bus);
+	bcmgenet_mii_exit(dev);
 	return ret;
 }
 
@@ -638,6 +588,6 @@ void bcmgenet_mii_exit(struct net_device *dev)
 	if (of_phy_is_fixed_link(dn))
 		of_phy_deregister_fixed_link(dn);
 	of_node_put(priv->phy_dn);
-	mdiobus_unregister(priv->mii_bus);
-	mdiobus_free(priv->mii_bus);
+	platform_device_unregister(priv->mii_pdev);
+	platform_device_put(priv->mii_pdev);
 }
diff --git a/drivers/net/phy/mdio-bcm-unimac.c b/drivers/net/phy/mdio-bcm-unimac.c
index 34395230ce709..89425ca484128 100644
--- a/drivers/net/phy/mdio-bcm-unimac.c
+++ b/drivers/net/phy/mdio-bcm-unimac.c
@@ -21,6 +21,8 @@
 #include <linux/of_platform.h>
 #include <linux/of_mdio.h>
 
+#include <linux/platform_data/mdio-bcm-unimac.h>
+
 #define MDIO_CMD		0x00
 #define  MDIO_START_BUSY	(1 << 29)
 #define  MDIO_READ_FAIL		(1 << 28)
@@ -41,6 +43,8 @@
 struct unimac_mdio_priv {
 	struct mii_bus		*mii_bus;
 	void __iomem		*base;
+	int (*wait_func)	(void *wait_func_data);
+	void			*wait_func_data;
 };
 
 static inline void unimac_mdio_start(struct unimac_mdio_priv *priv)
@@ -57,10 +61,28 @@ static inline unsigned int unimac_mdio_busy(struct unimac_mdio_priv *priv)
 	return __raw_readl(priv->base + MDIO_CMD) & MDIO_START_BUSY;
 }
 
+static int unimac_mdio_poll(void *wait_func_data)
+{
+	struct unimac_mdio_priv *priv = wait_func_data;
+	unsigned int timeout = 1000;
+
+	do {
+		if (!unimac_mdio_busy(priv))
+			return 0;
+
+		usleep_range(1000, 2000);
+	} while (timeout--);
+
+	if (!timeout)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
 static int unimac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
 {
 	struct unimac_mdio_priv *priv = bus->priv;
-	unsigned int timeout = 1000;
+	int ret;
 	u32 cmd;
 
 	/* Prepare the read operation */
@@ -70,15 +92,9 @@ static int unimac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
 	/* Start MDIO transaction */
 	unimac_mdio_start(priv);
 
-	do {
-		if (!unimac_mdio_busy(priv))
-			break;
-
-		usleep_range(1000, 2000);
-	} while (timeout--);
-
-	if (!timeout)
-		return -ETIMEDOUT;
+	ret = priv->wait_func(priv->wait_func_data);
+	if (ret)
+		return ret;
 
 	cmd = __raw_readl(priv->base + MDIO_CMD);
 
@@ -97,7 +113,6 @@ static int unimac_mdio_write(struct mii_bus *bus, int phy_id,
 			     int reg, u16 val)
 {
 	struct unimac_mdio_priv *priv = bus->priv;
-	unsigned int timeout = 1000;
 	u32 cmd;
 
 	/* Prepare the write operation */
@@ -107,17 +122,7 @@ static int unimac_mdio_write(struct mii_bus *bus, int phy_id,
 
 	unimac_mdio_start(priv);
 
-	do {
-		if (!unimac_mdio_busy(priv))
-			break;
-
-		usleep_range(1000, 2000);
-	} while (timeout--);
-
-	if (!timeout)
-		return -ETIMEDOUT;
-
-	return 0;
+	return priv->wait_func(priv->wait_func_data);
 }
 
 /* Workaround for integrated BCM7xxx Gigabit PHYs which have a problem with
@@ -155,8 +160,10 @@ static int unimac_mdio_reset(struct mii_bus *bus)
 	}
 
 	for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
-		if (read_mask & 1 << addr)
+		if (read_mask & 1 << addr) {
+			dev_dbg(&bus->dev, "Workaround for PHY @ %d\n", addr);
 			mdiobus_read(bus, addr, MII_BMSR);
+		}
 	}
 
 	return 0;
@@ -164,6 +171,7 @@ static int unimac_mdio_reset(struct mii_bus *bus)
 
 static int unimac_mdio_probe(struct platform_device *pdev)
 {
+	struct unimac_mdio_pdata *pdata = pdev->dev.platform_data;
 	struct unimac_mdio_priv *priv;
 	struct device_node *np;
 	struct mii_bus *bus;
@@ -193,12 +201,21 @@ static int unimac_mdio_probe(struct platform_device *pdev)
 
 	bus = priv->mii_bus;
 	bus->priv = priv;
-	bus->name = "unimac MII bus";
+	if (pdata) {
+		bus->name = pdata->bus_name;
+		priv->wait_func = pdata->wait_func;
+		priv->wait_func_data = pdata->wait_func_data;
+		bus->phy_mask = ~pdata->phy_mask;
+	} else {
+		bus->name = "unimac MII bus";
+		priv->wait_func_data = priv;
+		priv->wait_func = unimac_mdio_poll;
+	}
 	bus->parent = &pdev->dev;
 	bus->read = unimac_mdio_read;
 	bus->write = unimac_mdio_write;
 	bus->reset = unimac_mdio_reset;
-	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
+	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);
 
 	ret = of_mdiobus_register(bus, np);
 	if (ret) {
@@ -240,7 +257,7 @@ MODULE_DEVICE_TABLE(of, unimac_mdio_ids);
 
 static struct platform_driver unimac_mdio_driver = {
 	.driver = {
-		.name = "unimac-mdio",
+		.name = UNIMAC_MDIO_DRV_NAME,
 		.of_match_table = unimac_mdio_ids,
 	},
 	.probe	= unimac_mdio_probe,
@@ -251,4 +268,4 @@ module_platform_driver(unimac_mdio_driver);
 MODULE_AUTHOR("Broadcom Corporation");
 MODULE_DESCRIPTION("Broadcom UniMAC MDIO bus controller");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:unimac-mdio");
+MODULE_ALIAS("platform:" UNIMAC_MDIO_DRV_NAME);
diff --git a/include/linux/platform_data/mdio-bcm-unimac.h b/include/linux/platform_data/mdio-bcm-unimac.h
new file mode 100644
index 0000000000000..8a5f9f0b2c520
--- /dev/null
+++ b/include/linux/platform_data/mdio-bcm-unimac.h
@@ -0,0 +1,13 @@
+#ifndef __MDIO_BCM_UNIMAC_PDATA_H
+#define __MDIO_BCM_UNIMAC_PDATA_H
+
+struct unimac_mdio_pdata {
+	u32 phy_mask;
+	int (*wait_func)(void *data);
+	void *wait_func_data;
+	const char *bus_name;
+};
+
+#define UNIMAC_MDIO_DRV_NAME	"unimac-mdio"
+
+#endif /* __MDIO_BCM_UNIMAC_PDATA_H */