diff --git a/drivers/net/4xx_enet.c b/drivers/net/4xx_enet.c
index bc52ed3..fda7bb3 100644
--- a/drivers/net/4xx_enet.c
+++ b/drivers/net/4xx_enet.c
@@ -2015,8 +2015,17 @@
 		eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-		miiphy_register(dev->name,
-				emac4xx_miiphy_read, emac4xx_miiphy_write);
+		int retval;
+		struct mii_dev *mdiodev = mdio_alloc();
+		if (!mdiodev)
+			return -ENOMEM;
+		strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+		mdiodev->read = emac4xx_miiphy_read;
+		mdiodev->write = emac4xx_miiphy_write;
+
+		retval = mdio_register(mdiodev);
+		if (retval < 0)
+			return retval;
 #endif
 
 		if (0 == virgin) {
diff --git a/drivers/net/armada100_fec.c b/drivers/net/armada100_fec.c
index e6a6252..ba2cb1a 100644
--- a/drivers/net/armada100_fec.c
+++ b/drivers/net/armada100_fec.c
@@ -57,18 +57,19 @@
 	return !timeout;
 }
 
-static int smi_reg_read(const char *devname, u8 phy_addr, u8 phy_reg,
-			u16 *value)
+static int smi_reg_read(struct mii_dev *bus, int phy_addr, int devad,
+			int phy_reg)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	u16 value = 0;
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct armdfec_device *darmdfec = to_darmdfec(dev);
 	struct armdfec_reg *regs = darmdfec->regs;
 	u32 val;
 
 	if (phy_addr == PHY_ADR_REQ && phy_reg == PHY_ADR_REQ) {
 		val = readl(&regs->phyadr);
-		*value = val & 0x1f;
-		return 0;
+		value = val & 0x1f;
+		return value;
 	}
 
 	/* check parameters */
@@ -99,15 +100,15 @@
 		return -1;
 	}
 	val = readl(&regs->smi);
-	*value = val & 0xffff;
+	value = val & 0xffff;
 
-	return 0;
+	return value;
 }
 
-static int smi_reg_write(const char *devname,
-	 u8 phy_addr, u8 phy_reg, u16 value)
+static int smi_reg_write(struct mii_dev *bus, int phy_addr, int devad,
+			 int phy_reg, u16 value)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct armdfec_device *darmdfec = to_darmdfec(dev);
 	struct armdfec_reg *regs = darmdfec->regs;
 
@@ -711,7 +712,17 @@
 	eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, smi_reg_read, smi_reg_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = smi_reg_read;
+	mdiodev->write = smi_reg_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 	return 0;
 
diff --git a/drivers/net/at91_emac.c b/drivers/net/at91_emac.c
index 9151600..be3d82e 100644
--- a/drivers/net/at91_emac.c
+++ b/drivers/net/at91_emac.c
@@ -159,23 +159,23 @@
 	return (at91_emac_t *) netdev->iobase;
 }
 
-int  at91emac_mii_read(const char *devname, unsigned char addr,
-		unsigned char reg, unsigned short *value)
+int at91emac_mii_read(struct mii_dev *bus, int addr, int devad, int reg)
 {
+	unsigned short value = 0;
 	at91_emac_t *emac;
 
-	emac = get_emacbase_by_name(devname);
-	at91emac_read(emac , addr, reg, value);
-	return 0;
+	emac = get_emacbase_by_name(bus->name);
+	at91emac_read(emac , addr, reg, &value);
+	return value;
 }
 
 
-int  at91emac_mii_write(const char *devname, unsigned char addr,
-		unsigned char reg, unsigned short value)
+int at91emac_mii_write(struct mii_dev *bus, int addr, int devad, int reg,
+		       u16 value)
 {
 	at91_emac_t *emac;
 
-	emac = get_emacbase_by_name(devname);
+	emac = get_emacbase_by_name(bus->name);
 	at91emac_write(emac, addr, reg, value);
 	return 0;
 }
@@ -502,7 +502,17 @@
 	eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, at91emac_mii_read, at91emac_mii_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = at91emac_mii_read;
+	mdiodev->write = at91emac_mii_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 	return 1;
 }
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index 61cb1b0..6d40370 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -72,18 +72,20 @@
 	return 0;
 }
 
-static int bfin_miiphy_read(const char *devname, uchar addr, uchar reg, ushort *val)
+static int bfin_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg)
 {
+	ushort val = 0;
 	if (bfin_miiphy_wait())
 		return 1;
 	bfin_write_EMAC_STAADD(SET_PHYAD(addr) | SET_REGAD(reg) | STABUSY);
 	if (bfin_miiphy_wait())
 		return 1;
-	*val = bfin_read_EMAC_STADAT();
-	return 0;
+	val = bfin_read_EMAC_STADAT();
+	return val;
 }
 
-static int bfin_miiphy_write(const char *devname, uchar addr, uchar reg, ushort val)
+static int bfin_miiphy_write(struct mii_dev *bus, int addr, int devad,
+			     int reg, u16 val)
 {
 	if (bfin_miiphy_wait())
 		return 1;
@@ -113,7 +115,17 @@
 	eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, bfin_miiphy_read, bfin_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = bfin_miiphy_read;
+	mdiodev->write = bfin_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	return 0;
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index b030498..7eda93f 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -390,12 +390,18 @@
 
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-static int davinci_mii_phy_read(const char *devname, unsigned char addr, unsigned char reg, unsigned short *value)
+static int davinci_mii_phy_read(struct mii_dev *bus, int addr, int devad,
+				int reg)
 {
-	return(davinci_eth_phy_read(addr, reg, value) ? 0 : 1);
+	unsigned short value = 0;
+	int retval = (davinci_eth_phy_read(addr, reg, &value) ? 0 : 1);
+	if (retval < 0)
+		return retval;
+	return value;
 }
 
-static int davinci_mii_phy_write(const char *devname, unsigned char addr, unsigned char reg, unsigned short value)
+static int davinci_mii_phy_write(struct mii_dev *bus, int addr, int devad,
+				 int reg, u16 value)
 {
 	return(davinci_eth_phy_write(addr, reg, value) ? 0 : 1);
 }
@@ -883,8 +889,17 @@
 
 		debug("Ethernet PHY: %s\n", phy[i].name);
 
-		miiphy_register(phy[i].name, davinci_mii_phy_read,
-						davinci_mii_phy_write);
+		int retval;
+		struct mii_dev *mdiodev = mdio_alloc();
+		if (!mdiodev)
+			return -ENOMEM;
+		strncpy(mdiodev->name, phy[i].name, MDIO_NAME_LEN);
+		mdiodev->read = davinci_mii_phy_read;
+		mdiodev->write = davinci_mii_phy_write;
+
+		retval = mdio_register(mdiodev);
+		if (retval < 0)
+			return retval;
 	}
 
 #if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
diff --git a/drivers/net/eepro100.c b/drivers/net/eepro100.c
index d4a6386..0f350cb 100644
--- a/drivers/net/eepro100.c
+++ b/drivers/net/eepro100.c
@@ -334,34 +334,35 @@
 	return dev;
 }
 
-static int eepro100_miiphy_read(const char *devname, unsigned char addr,
-		unsigned char reg, unsigned short *value)
+static int eepro100_miiphy_read(struct mii_dev *bus, int addr, int devad,
+				int reg)
 {
+	unsigned short value = 0;
 	struct eth_device *dev;
 
-	dev = verify_phyaddr(devname, addr);
+	dev = verify_phyaddr(bus->name, addr);
 	if (dev == NULL)
 		return -1;
 
-	if (get_phyreg(dev, addr, reg, value) != 0) {
-		printf("%s: mii read timeout!\n", devname);
+	if (get_phyreg(dev, addr, reg, &value) != 0) {
+		printf("%s: mii read timeout!\n", bus->name);
 		return -1;
 	}
 
-	return 0;
+	return value;
 }
 
-static int eepro100_miiphy_write(const char *devname, unsigned char addr,
-		unsigned char reg, unsigned short value)
+static int eepro100_miiphy_write(struct mii_dev *bus, int addr, int devad,
+				 int reg, u16 value)
 {
 	struct eth_device *dev;
 
-	dev = verify_phyaddr(devname, addr);
+	dev = verify_phyaddr(bus->name, addr);
 	if (dev == NULL)
 		return -1;
 
 	if (set_phyreg(dev, addr, reg, value) != 0) {
-		printf("%s: mii write timeout!\n", devname);
+		printf("%s: mii write timeout!\n", bus->name);
 		return -1;
 	}
 
@@ -451,8 +452,17 @@
 
 #if defined (CONFIG_MII) || defined(CONFIG_CMD_MII)
 		/* register mii command access routines */
-		miiphy_register(dev->name,
-				eepro100_miiphy_read, eepro100_miiphy_write);
+		int retval;
+		struct mii_dev *mdiodev = mdio_alloc();
+		if (!mdiodev)
+			return -ENOMEM;
+		strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+		mdiodev->read = eepro100_miiphy_read;
+		mdiodev->write = eepro100_miiphy_write;
+
+		retval = mdio_register(mdiodev);
+		if (retval < 0)
+			return retval;
 #endif
 
 		card_number++;
diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
index 611eabb..2fe323a 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -742,9 +742,10 @@
  *
  * This function is registered with miiphy_register().
  */
-int enc_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value)
+int enc_miiphy_read(struct mii_dev *bus, int phy_adr, int devad, int reg)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	u16 value = 0;
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	enc_dev_t *enc;
 
 	if (!dev || phy_adr != 0)
@@ -757,9 +758,9 @@
 		enc_release_bus(enc);
 		return -1;
 	}
-	*value = enc_phy_read(enc, reg);
+	value = enc_phy_read(enc, reg);
 	enc_release_bus(enc);
-	return 0;
+	return value;
 }
 
 /*
@@ -767,9 +768,10 @@
  *
  * This function is registered with miiphy_register().
  */
-int enc_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
+int enc_miiphy_write(struct mii_dev *bus, int phy_adr, int devad, int reg,
+		     u16 value)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	enc_dev_t *enc;
 
 	if (!dev || phy_adr != 0)
@@ -958,7 +960,17 @@
 	sprintf(dev->name, "enc%i.%i", bus, cs);
 	eth_register(dev);
 #if defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, enc_miiphy_read, enc_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = enc_miiphy_read;
+	mdiodev->write = enc_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 	return 0;
 }
diff --git a/drivers/net/ep93xx_eth.c b/drivers/net/ep93xx_eth.c
index a3721c5..0021911 100644
--- a/drivers/net/ep93xx_eth.c
+++ b/drivers/net/ep93xx_eth.c
@@ -30,10 +30,10 @@
 #define GET_REGS(eth_dev)	(GET_PRIV(eth_dev)->regs)
 
 /* ep93xx_miiphy ops forward declarations */
-static int ep93xx_miiphy_read(const char * const dev, unsigned char const addr,
-			unsigned char const reg, unsigned short * const value);
-static int ep93xx_miiphy_write(const char * const dev, unsigned char const addr,
-			unsigned char const reg, unsigned short const value);
+static int ep93xx_miiphy_read(struct mii_dev *bus, int addr, int devad,
+			      int reg);
+static int ep93xx_miiphy_write(struct mii_dev *bus, int addr, int devad,
+			       int reg, u16 value);
 
 #if defined(EP93XX_MAC_DEBUG)
 /**
@@ -421,7 +421,17 @@
 #if defined(CONFIG_MII)
 int ep93xx_miiphy_initialize(bd_t * const bd)
 {
-	miiphy_register("ep93xx_eth0", ep93xx_miiphy_read, ep93xx_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, "ep93xx_eth0", MDIO_NAME_LEN);
+	mdiodev->read = ep93xx_miiphy_read;
+	mdiodev->write = ep93xx_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 	return 0;
 }
 #endif
@@ -542,9 +552,10 @@
 /**
  * Read a 16-bit value from an MII register.
  */
-static int ep93xx_miiphy_read(const char * const dev, unsigned char const addr,
-			unsigned char const reg, unsigned short * const value)
+static int ep93xx_miiphy_read(struct mii_dev *bus, int addr, int devad,
+			      int reg)
 {
+	unsigned short value = 0;
 	struct mac_regs *mac = (struct mac_regs *)MAC_BASE;
 	int ret = -1;
 	uint32_t self_ctl;
@@ -552,10 +563,10 @@
 	debug("+ep93xx_miiphy_read");
 
 	/* Parameter checks */
-	BUG_ON(dev == NULL);
+	BUG_ON(bus->name == NULL);
 	BUG_ON(addr > MII_ADDRESS_MAX);
 	BUG_ON(reg > MII_REGISTER_MAX);
-	BUG_ON(value == NULL);
+	BUG_ON(&value == NULL);
 
 	/*
 	 * Save the current SelfCTL register value.  Set MAC to suppress
@@ -579,7 +590,7 @@
 	while (readl(&mac->miists) & MIISTS_BUSY)
 		; /* noop */
 
-	*value = (unsigned short)readl(&mac->miidata);
+	value = (unsigned short)readl(&mac->miidata);
 
 	/* Restore the saved SelfCTL value and return. */
 	writel(self_ctl, &mac->selfctl);
@@ -588,14 +599,16 @@
 	/* Fall through */
 
 	debug("-ep93xx_miiphy_read");
-	return ret;
+	if (ret < 0)
+		return ret;
+	return value;
 }
 
 /**
  * Write a 16-bit value to an MII register.
  */
-static int ep93xx_miiphy_write(const char * const dev, unsigned char const addr,
-			unsigned char const reg, unsigned short const value)
+static int ep93xx_miiphy_write(struct mii_dev *bus, int addr, int devad,
+			       int reg, u16 value)
 {
 	struct mac_regs *mac = (struct mac_regs *)MAC_BASE;
 	int ret = -1;
@@ -604,7 +617,7 @@
 	debug("+ep93xx_miiphy_write");
 
 	/* Parameter checks */
-	BUG_ON(dev == NULL);
+	BUG_ON(bus->name == NULL);
 	BUG_ON(addr > MII_ADDRESS_MAX);
 	BUG_ON(reg > MII_REGISTER_MAX);
 
diff --git a/drivers/net/fsl_mcdmafec.c b/drivers/net/fsl_mcdmafec.c
index 792534b..15a3ce0 100644
--- a/drivers/net/fsl_mcdmafec.c
+++ b/drivers/net/fsl_mcdmafec.c
@@ -556,8 +556,17 @@
 		eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-		miiphy_register(dev->name,
-				mcffec_miiphy_read, mcffec_miiphy_write);
+		int retval;
+		struct mii_dev *mdiodev = mdio_alloc();
+		if (!mdiodev)
+			return -ENOMEM;
+		strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+		mdiodev->read = mcffec_miiphy_read;
+		mdiodev->write = mcffec_miiphy_write;
+
+		retval = mdio_register(mdiodev);
+		if (retval < 0)
+			return retval;
 #endif
 
 		if (i > 0)
diff --git a/drivers/net/ftmac110.c b/drivers/net/ftmac110.c
index 4f17015..8fa767a 100644
--- a/drivers/net/ftmac110.c
+++ b/drivers/net/ftmac110.c
@@ -364,32 +364,35 @@
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 
-static int ftmac110_mdio_read(
-	const char *devname, uint8_t addr, uint8_t reg, uint16_t *value)
+static int ftmac110_mdio_read(struct mii_dev *bus, int addr, int devad,
+			      int reg)
 {
+	uint16_t value = 0;
 	int ret = 0;
 	struct eth_device *dev;
 
-	dev = eth_get_dev_by_name(devname);
+	dev = eth_get_dev_by_name(bus->name);
 	if (dev == NULL) {
-		printf("%s: no such device\n", devname);
+		printf("%s: no such device\n", bus->name);
 		ret = -1;
 	} else {
-		*value = mdio_read(dev, addr, reg);
+		value = mdio_read(dev, addr, reg);
 	}
 
-	return ret;
+	if (ret < 0)
+		return ret;
+	return value;
 }
 
-static int ftmac110_mdio_write(
-	const char *devname, uint8_t addr, uint8_t reg, uint16_t value)
+static int ftmac110_mdio_write(struct mii_dev *bus, int addr, int devad,
+			       int reg, u16 value)
 {
 	int ret = 0;
 	struct eth_device *dev;
 
-	dev = eth_get_dev_by_name(devname);
+	dev = eth_get_dev_by_name(bus->name);
 	if (dev == NULL) {
-		printf("%s: no such device\n", devname);
+		printf("%s: no such device\n", bus->name);
 		ret = -1;
 	} else {
 		mdio_write(dev, addr, reg, value);
@@ -468,7 +471,17 @@
 	eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, ftmac110_mdio_read, ftmac110_mdio_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = ftmac110_mdio_read;
+	mdiodev->write = ftmac110_mdio_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	card_nr++;
diff --git a/drivers/net/lpc32xx_eth.c b/drivers/net/lpc32xx_eth.c
index 6cc273c..36af795 100644
--- a/drivers/net/lpc32xx_eth.c
+++ b/drivers/net/lpc32xx_eth.c
@@ -226,9 +226,11 @@
  *
  * Returns 16bit phy register value, or 0xffff on error
  */
-static int mii_reg_read(const char *devname, u8 phy_adr, u8 reg_ofs, u16 *data)
+static int mii_reg_read(struct mii_dev *bus, int phy_adr, int devad,
+			int reg_ofs)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	u16 data = 0;
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct lpc32xx_eth_device *dlpc32xx_eth = to_lpc32xx_eth(dev);
 	struct lpc32xx_eth_registers *regs = dlpc32xx_eth->regs;
 	u32 mind_reg;
@@ -270,12 +272,12 @@
 		return -EFAULT;
 	}
 
-	*data = (u16) readl(&regs->mrdd);
+	data = (u16) readl(&regs->mrdd);
 
 	debug("%s:(adr %d, off %d) => %04x\n", __func__, phy_adr,
-	      reg_ofs, *data);
+	      reg_ofs, data);
 
-	return 0;
+	return data;
 }
 
 /*
@@ -284,9 +286,10 @@
  * Returns 0 if write succeed, -EINVAL on bad parameters
  * -ETIME on timeout
  */
-static int mii_reg_write(const char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
+static int mii_reg_write(struct mii_dev *bus, int phy_adr, int devad,
+			 int reg_ofs, u16 data)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct lpc32xx_eth_device *dlpc32xx_eth = to_lpc32xx_eth(dev);
 	struct lpc32xx_eth_registers *regs = dlpc32xx_eth->regs;
 	u32 mind_reg;
@@ -645,7 +648,17 @@
 #if defined(CONFIG_PHYLIB)
 	lpc32xx_eth_phylib_init(dev, CONFIG_PHY_ADDR);
 #elif defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, mii_reg_read, mii_reg_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = mii_reg_read;
+	mdiodev->write = mii_reg_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	return 0;
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index e068c20..921537f 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -205,39 +205,41 @@
 
 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
 
-int macb_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value)
+int macb_miiphy_read(struct mii_dev *bus, int phy_adr, int devad, int reg)
 {
+	u16 value = 0;
 #ifdef CONFIG_DM_ETH
-	struct udevice *dev = eth_get_dev_by_name(devname);
+	struct udevice *dev = eth_get_dev_by_name(bus->name);
 	struct macb_device *macb = dev_get_priv(dev);
 #else
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct macb_device *macb = to_macb(dev);
 #endif
 
 	if (macb->phy_addr != phy_adr)
 		return -1;
 
-	arch_get_mdio_control(devname);
-	*value = macb_mdio_read(macb, reg);
+	arch_get_mdio_control(bus->name);
+	value = macb_mdio_read(macb, reg);
 
-	return 0;
+	return value;
 }
 
-int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
+int macb_miiphy_write(struct mii_dev *bus, int phy_adr, int devad, int reg,
+		      u16 value)
 {
 #ifdef CONFIG_DM_ETH
-	struct udevice *dev = eth_get_dev_by_name(devname);
+	struct udevice *dev = eth_get_dev_by_name(bus->name);
 	struct macb_device *macb = dev_get_priv(dev);
 #else
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct macb_device *macb = to_macb(dev);
 #endif
 
 	if (macb->phy_addr != phy_adr)
 		return -1;
 
-	arch_get_mdio_control(devname);
+	arch_get_mdio_control(bus->name);
 	macb_mdio_write(macb, reg, value);
 
 	return 0;
@@ -913,7 +915,17 @@
 	eth_register(netdev);
 
 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
-	miiphy_register(netdev->name, macb_miiphy_read, macb_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, netdev->name, MDIO_NAME_LEN);
+	mdiodev->read = macb_miiphy_read;
+	mdiodev->write = macb_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 	macb->bus = miiphy_get_dev_by_name(netdev->name);
 #endif
 	return 0;
@@ -998,7 +1010,17 @@
 
 	_macb_eth_initialize(macb);
 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
-	miiphy_register(dev->name, macb_miiphy_read, macb_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = macb_miiphy_read;
+	mdiodev->write = macb_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 	macb->bus = miiphy_get_dev_by_name(dev->name);
 #endif
 
diff --git a/drivers/net/mcffec.c b/drivers/net/mcffec.c
index fd73099..e1b06b2 100644
--- a/drivers/net/mcffec.c
+++ b/drivers/net/mcffec.c
@@ -595,8 +595,17 @@
 		eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-		miiphy_register(dev->name,
-				mcffec_miiphy_read, mcffec_miiphy_write);
+		int retval;
+		struct mii_dev *mdiodev = mdio_alloc();
+		if (!mdiodev)
+			return -ENOMEM;
+		strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+		mdiodev->read = mcffec_miiphy_read;
+		mdiodev->write = mcffec_miiphy_write;
+
+		retval = mdio_register(mdiodev);
+		if (retval < 0)
+			return retval;
 #endif
 		if (i > 0)
 			fec_info[i - 1].next = &fec_info[i];
diff --git a/drivers/net/mpc512x_fec.c b/drivers/net/mpc512x_fec.c
index e850672..b3746fb 100644
--- a/drivers/net/mpc512x_fec.c
+++ b/drivers/net/mpc512x_fec.c
@@ -22,8 +22,10 @@
 #error "CONFIG_MII has to be defined!"
 #endif
 
-int fec512x_miiphy_read(const char *devname, u8 phyAddr, u8 regAddr, u16 * retVal);
-int fec512x_miiphy_write(const char *devname, u8 phyAddr, u8 regAddr, u16 data);
+int fec512x_miiphy_read(struct mii_dev *bus, int phyAddr, int devad,
+			int regAddr);
+int fec512x_miiphy_write(struct mii_dev *bus, int phyAddr, int devad,
+			 int regAddr, u16 data);
 int mpc512x_fec_init_phy(struct eth_device *dev, bd_t * bis);
 
 static uchar rx_buff[FEC_BUFFER_SIZE];
@@ -639,8 +641,17 @@
 	eth_register (dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register (dev->name,
-			fec512x_miiphy_read, fec512x_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = fec512x_miiphy_read;
+	mdiodev->write = fec512x_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	/* Clean up space FEC's MIB and FIFO RAM ...*/
@@ -670,8 +681,10 @@
 
 /* MII-interface related functions */
 /********************************************************************/
-int fec512x_miiphy_read(const char *devname, u8 phyAddr, u8 regAddr, u16 *retVal)
+int fec512x_miiphy_read(struct mii_dev *bus, int phyAddr, int devad,
+			int regAddr)
 {
+	u16 retVal = 0;
 	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
 	volatile fec512x_t *eth = &im->fec;
 	u32 reg;		/* convenient holder for the PHY register */
@@ -711,13 +724,14 @@
 	/*
 	 * it's now safe to read the PHY's register
 	 */
-	*retVal = (u16) in_be32(&eth->mii_data);
+	retVal = (u16) in_be32(&eth->mii_data);
 
-	return 0;
+	return retVal;
 }
 
 /********************************************************************/
-int fec512x_miiphy_write(const char *devname, u8 phyAddr, u8 regAddr, u16 data)
+int fec512x_miiphy_write(struct mii_dev *bus, int phyAddr, int devad,
+			 int regAddr, u16 data)
 {
 	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
 	volatile fec512x_t *eth = &im->fec;
diff --git a/drivers/net/mpc5xxx_fec.c b/drivers/net/mpc5xxx_fec.c
index e13b4cf..d75e858 100644
--- a/drivers/net/mpc5xxx_fec.c
+++ b/drivers/net/mpc5xxx_fec.c
@@ -35,8 +35,10 @@
     uint8 head[16];             /* MAC header(6 + 6 + 2) + 2(aligned) */
 } NBUF;
 
-int fec5xxx_miiphy_read(const char *devname, uint8 phyAddr, uint8 regAddr, uint16 *retVal);
-int fec5xxx_miiphy_write(const char *devname, uint8 phyAddr, uint8 regAddr, uint16 data);
+int fec5xxx_miiphy_read(struct mii_dev *bus, int phyAddr, int devad,
+			int regAddr);
+int fec5xxx_miiphy_write(struct mii_dev *bus, int phyAddr, int devad,
+			 int regAddr, u16 data);
 
 static int mpc5xxx_fec_init_phy(struct eth_device *dev, bd_t * bis);
 
@@ -917,8 +919,17 @@
 	eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register (dev->name,
-			fec5xxx_miiphy_read, fec5xxx_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = fec5xxx_miiphy_read;
+	mdiodev->write = fec5xxx_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	/*
@@ -941,8 +952,10 @@
 
 /* MII-interface related functions */
 /********************************************************************/
-int fec5xxx_miiphy_read(const char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal)
+int fec5xxx_miiphy_read(struct mii_dev *bus, int phyAddr, int devad,
+			int regAddr)
 {
+	uint16 retVal = 0;
 	ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
 	uint32 reg;		/* convenient holder for the PHY register */
 	uint32 phy;		/* convenient holder for the PHY */
@@ -977,13 +990,14 @@
 	/*
 	 * it's now safe to read the PHY's register
 	 */
-	*retVal = (uint16) eth->mii_data;
+	retVal = (uint16) eth->mii_data;
 
-	return 0;
+	return retVal;
 }
 
 /********************************************************************/
-int fec5xxx_miiphy_write(const char *devname, uint8 phyAddr, uint8 regAddr, uint16 data)
+int fec5xxx_miiphy_write(struct mii_dev *bus, int phyAddr, int devad,
+			 int regAddr, u16 data)
 {
 	ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
 	uint32 reg;		/* convenient holder for the PHY register */
diff --git a/drivers/net/mvgbe.c b/drivers/net/mvgbe.c
index b16be92..a1c7ea0 100644
--- a/drivers/net/mvgbe.c
+++ b/drivers/net/mvgbe.c
@@ -48,9 +48,11 @@
  *
  * Returns 16bit phy register value, or 0xffff on error
  */
-static int smi_reg_read(const char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
+static int smi_reg_read(struct mii_dev *bus, int phy_adr, int devad,
+			int reg_ofs)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	u16 data = 0;
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct mvgbe_device *dmvgbe = to_mvgbe(dev);
 	struct mvgbe_registers *regs = dmvgbe->regs;
 	u32 smi_reg;
@@ -60,8 +62,8 @@
 	if (phy_adr == MV_PHY_ADR_REQUEST &&
 			reg_ofs == MV_PHY_ADR_REQUEST) {
 		/* */
-		*data = (u16) (MVGBE_REG_RD(regs->phyadr) & PHYADR_MASK);
-		return 0;
+		data = (u16) (MVGBE_REG_RD(regs->phyadr) & PHYADR_MASK);
+		return data;
 	}
 	/* check parameters */
 	if (phy_adr > PHYADR_MASK) {
@@ -111,12 +113,12 @@
 	for (timeout = 0; timeout < MVGBE_PHY_SMI_TIMEOUT; timeout++)
 		;
 
-	*data = (u16) (MVGBE_REG_RD(MVGBE_SMI_REG) & MVGBE_PHY_SMI_DATA_MASK);
+	data = (u16) (MVGBE_REG_RD(MVGBE_SMI_REG) & MVGBE_PHY_SMI_DATA_MASK);
 
 	debug("%s:(adr %d, off %d) value= %04x\n", __func__, phy_adr, reg_ofs,
-	      *data);
+	      data);
 
-	return 0;
+	return data;
 }
 
 /*
@@ -125,9 +127,10 @@
  * Returns 0 if write succeed, -EINVAL on bad parameters
  * -ETIME on timeout
  */
-static int smi_reg_write(const char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
+static int smi_reg_write(struct mii_dev *bus, int phy_adr, int devad,
+			 int reg_ofs, u16 data)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct mvgbe_device *dmvgbe = to_mvgbe(dev);
 	struct mvgbe_registers *regs = dmvgbe->regs;
 	u32 smi_reg;
@@ -785,7 +788,17 @@
 #if defined(CONFIG_PHYLIB)
 		mvgbe_phylib_init(dev, PHY_BASE_ADR + devnum);
 #elif defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-		miiphy_register(dev->name, smi_reg_read, smi_reg_write);
+		int retval;
+		struct mii_dev *mdiodev = mdio_alloc();
+		if (!mdiodev)
+			return -ENOMEM;
+		strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+		mdiodev->read = smi_reg_read;
+		mdiodev->write = smi_reg_write;
+
+		retval = mdio_register(mdiodev);
+		if (retval < 0)
+			return retval;
 		/* Set phy address of the port */
 		miiphy_write(dev->name, MV_PHY_ADR_REQUEST,
 				MV_PHY_ADR_REQUEST, PHY_BASE_ADR + devnum);
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c
index 2fa2016..79c1db2 100644
--- a/drivers/net/sh_eth.c
+++ b/drivers/net/sh_eth.c
@@ -566,7 +566,17 @@
 	eth_register(dev);
 
 	bb_miiphy_buses[0].priv = eth;
-	miiphy_register(dev->name, bb_miiphy_read, bb_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = bb_miiphy_read;
+	mdiodev->write = bb_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 
 	if (!eth_getenv_enetaddr("ethaddr", dev->enetaddr))
 		puts("Please set MAC address\n");
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index c85a178..c788f3b 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -219,17 +219,24 @@
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 /* wrapper for smc911x_eth_phy_read */
-static int smc911x_miiphy_read(const char *devname, u8 phy, u8 reg, u16 *val)
+static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
+			       int reg)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
-	if (dev)
-		return smc911x_eth_phy_read(dev, phy, reg, val);
+	u16 val = 0;
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
+	if (dev) {
+		int retval = smc911x_eth_phy_read(dev, phy, reg, &val);
+		if (retval < 0)
+			return retval;
+		return val;
+	}
 	return -1;
 }
 /* wrapper for smc911x_eth_phy_write */
-static int smc911x_miiphy_write(const char *devname, u8 phy, u8 reg, u16 val)
+static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
+				int reg, u16 val)
 {
-	struct eth_device *dev = eth_get_dev_by_name(devname);
+	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	if (dev)
 		return smc911x_eth_phy_write(dev, phy, reg, val);
 	return -1;
@@ -276,7 +283,17 @@
 	eth_register(dev);
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, smc911x_miiphy_read, smc911x_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = smc911x_miiphy_read;
+	mdiodev->write = smc911x_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	return 1;
diff --git a/drivers/qe/uec.c b/drivers/qe/uec.c
index 40cccc2..d838520 100644
--- a/drivers/qe/uec.c
+++ b/drivers/qe/uec.c
@@ -623,20 +623,20 @@
  * Returns:
  *  0 on success
  */
-static int uec_miiphy_read(const char *devname, unsigned char addr,
-			    unsigned char reg, unsigned short *value)
+static int uec_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg)
 {
+	unsigned short value = 0;
 	int devindex = 0;
 
-	if (devname == NULL || value == NULL) {
+	if (bus->name == NULL || &value == NULL) {
 		debug("%s: NULL pointer given\n", __FUNCTION__);
 	} else {
-		devindex = uec_miiphy_find_dev_by_name(devname);
+		devindex = uec_miiphy_find_dev_by_name(bus->name);
 		if (devindex >= 0) {
-			*value = uec_read_phy_reg(devlist[devindex], addr, reg);
+			value = uec_read_phy_reg(devlist[devindex], addr, reg);
 		}
 	}
-	return 0;
+	return value;
 }
 
 /*
@@ -645,15 +645,15 @@
  * Returns:
  *  0 on success
  */
-static int uec_miiphy_write(const char *devname, unsigned char addr,
-			     unsigned char reg, unsigned short value)
+static int uec_miiphy_write(struct mii_dev *bus, int addr, int devad, int reg,
+			    u16 value)
 {
 	int devindex = 0;
 
-	if (devname == NULL) {
+	if (bus->name == NULL) {
 		debug("%s: NULL pointer given\n", __FUNCTION__);
 	} else {
-		devindex = uec_miiphy_find_dev_by_name(devname);
+		devindex = uec_miiphy_find_dev_by_name(bus->name);
 		if (devindex >= 0) {
 			uec_write_phy_reg(devlist[devindex], addr, reg, value);
 		}
@@ -1399,7 +1399,17 @@
 	}
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-	miiphy_register(dev->name, uec_miiphy_read, uec_miiphy_write);
+	int retval;
+	struct mii_dev *mdiodev = mdio_alloc();
+	if (!mdiodev)
+		return -ENOMEM;
+	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
+	mdiodev->read = uec_miiphy_read;
+	mdiodev->write = uec_miiphy_write;
+
+	retval = mdio_register(mdiodev);
+	if (retval < 0)
+		return retval;
 #endif
 
 	return 1;