diff --git a/drivers/net/4xx_enet.c b/drivers/net/4xx_enet.c
index 144b851..d9487ad 100644
--- a/drivers/net/4xx_enet.c
+++ b/drivers/net/4xx_enet.c
@@ -305,9 +305,9 @@
 static void emac_err (struct eth_device *dev, unsigned long isr);
 
 extern int phy_setup_aneg (char *devname, unsigned char addr);
-extern int emac4xx_miiphy_read (char *devname, unsigned char addr,
+extern int emac4xx_miiphy_read (const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short *value);
-extern int emac4xx_miiphy_write (char *devname, unsigned char addr,
+extern int emac4xx_miiphy_write (const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short value);
 
 int board_emac_count(void);
diff --git a/drivers/net/altera_tse.c b/drivers/net/altera_tse.c
index 5c0c274..d45aab1 100644
--- a/drivers/net/altera_tse.c
+++ b/drivers/net/altera_tse.c
@@ -426,7 +426,7 @@
 
 /* MDIO access to phy */
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) && !defined(BITBANGMII)
-static int altera_tse_miiphy_write(char *devname, unsigned char addr,
+static int altera_tse_miiphy_write(const char *devname, unsigned char addr,
 				   unsigned char reg, unsigned short value)
 {
 	struct eth_device *dev;
@@ -439,7 +439,7 @@
 	return 0;
 }
 
-static int altera_tse_miiphy_read(char *devname, unsigned char addr,
+static int altera_tse_miiphy_read(const char *devname, unsigned char addr,
 				  unsigned char reg, unsigned short *value)
 {
 	struct eth_device *dev;
diff --git a/drivers/net/at91_emac.c b/drivers/net/at91_emac.c
index 245da12..0912f52 100644
--- a/drivers/net/at91_emac.c
+++ b/drivers/net/at91_emac.c
@@ -170,7 +170,7 @@
 	return (at91_emac_t *) netdev->iobase;
 }
 
-int  at91emac_mii_read(char *devname, unsigned char addr,
+int  at91emac_mii_read(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short *value)
 {
 	at91_emac_t *emac;
@@ -181,7 +181,7 @@
 }
 
 
-int  at91emac_mii_write(char *devname, unsigned char addr,
+int  at91emac_mii_write(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short value)
 {
 	at91_emac_t *emac;
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index e691bdf..36d4046 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -71,7 +71,7 @@
 	return 0;
 }
 
-static int bfin_miiphy_read(char *devname, uchar addr, uchar reg, ushort *val)
+static int bfin_miiphy_read(const char *devname, uchar addr, uchar reg, ushort *val)
 {
 	if (bfin_miiphy_wait())
 		return 1;
@@ -82,7 +82,7 @@
 	return 0;
 }
 
-static int bfin_miiphy_write(char *devname, uchar addr, uchar reg, ushort val)
+static int bfin_miiphy_write(const char *devname, uchar addr, uchar reg, ushort val)
 {
 	if (bfin_miiphy_wait())
 		return 1;
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 02bbb8c..41a9910 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -252,12 +252,12 @@
 
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-static int davinci_mii_phy_read(char *devname, unsigned char addr, unsigned char reg, unsigned short *value)
+static int davinci_mii_phy_read(const char *devname, unsigned char addr, unsigned char reg, unsigned short *value)
 {
 	return(davinci_eth_phy_read(addr, reg, value) ? 0 : 1);
 }
 
-static int davinci_mii_phy_write(char *devname, unsigned char addr, unsigned char reg, unsigned short value)
+static int davinci_mii_phy_write(const char *devname, unsigned char addr, unsigned char reg, unsigned short value)
 {
 	return(davinci_eth_phy_write(addr, reg, value) ? 0 : 1);
 }
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index d0d9827..2f923f2 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -451,7 +451,7 @@
 }
 
 #if defined(CONFIG_MII)
-static int dw_mii_read(char *devname, u8 addr, u8 reg, u16 *val)
+static int dw_mii_read(const char *devname, u8 addr, u8 reg, u16 *val)
 {
 	struct eth_device *dev;
 
@@ -462,7 +462,7 @@
 	return 0;
 }
 
-static int dw_mii_write(char *devname, u8 addr, u8 reg, u16 val)
+static int dw_mii_write(const char *devname, u8 addr, u8 reg, u16 val)
 {
 	struct eth_device *dev;
 
diff --git a/drivers/net/eepro100.c b/drivers/net/eepro100.c
index 9c06b25..5cb767a 100644
--- a/drivers/net/eepro100.c
+++ b/drivers/net/eepro100.c
@@ -350,7 +350,7 @@
 	return dev;
 }
 
-static int eepro100_miiphy_read (char *devname, unsigned char addr,
+static int eepro100_miiphy_read(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short *value)
 {
 	struct eth_device *dev;
@@ -367,7 +367,7 @@
 	return 0;
 }
 
-static int eepro100_miiphy_write (char *devname, unsigned char addr,
+static int eepro100_miiphy_write(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short value)
 {
 	struct eth_device *dev;
diff --git a/drivers/net/ep93xx_eth.c b/drivers/net/ep93xx_eth.c
index 4e39948..c09384c 100644
--- a/drivers/net/ep93xx_eth.c
+++ b/drivers/net/ep93xx_eth.c
@@ -44,9 +44,9 @@
 #define GET_REGS(eth_dev)	(GET_PRIV(eth_dev)->regs)
 
 /* ep93xx_miiphy ops forward declarations */
-static int ep93xx_miiphy_read(char * const dev, unsigned char const addr,
+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(char * const dev, unsigned char const addr,
+static int ep93xx_miiphy_write(const char * const dev, unsigned char const addr,
 			unsigned char const reg, unsigned short const value);
 
 #if defined(EP93XX_MAC_DEBUG)
@@ -555,7 +555,7 @@
 /**
  * Read a 16-bit value from an MII register.
  */
-static int ep93xx_miiphy_read(char * const dev, unsigned char const addr,
+static int ep93xx_miiphy_read(const char * const dev, unsigned char const addr,
 			unsigned char const reg, unsigned short * const value)
 {
 	struct mac_regs *mac = (struct mac_regs *)MAC_BASE;
@@ -607,7 +607,7 @@
 /**
  * Write a 16-bit value to an MII register.
  */
-static int ep93xx_miiphy_write(char * const dev, unsigned char const addr,
+static int ep93xx_miiphy_write(const char * const dev, unsigned char const addr,
 			unsigned char const reg, unsigned short const value)
 {
 	struct mac_regs *mac = (struct mac_regs *)MAC_BASE;
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 6b801ce..2d4ffed 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -62,7 +62,7 @@
 /*
  * MII-interface related functions
  */
-static int fec_miiphy_read(char *dev, uint8_t phyAddr, uint8_t regAddr,
+static int fec_miiphy_read(const char *dev, uint8_t phyAddr, uint8_t regAddr,
 		uint16_t *retVal)
 {
 	struct eth_device *edev = eth_get_dev_by_name(dev);
@@ -119,7 +119,7 @@
 	debug("fec_init: mii_speed %#lx\n",
 			fec->eth->mii_speed);
 }
-static int fec_miiphy_write(char *dev, uint8_t phyAddr, uint8_t regAddr,
+static int fec_miiphy_write(const char *dev, uint8_t phyAddr, uint8_t regAddr,
 		uint16_t data)
 {
 	struct eth_device *edev = eth_get_dev_by_name(dev);
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 6a58a37..acb8d20 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -167,7 +167,7 @@
 
 #if defined(CONFIG_CMD_MII)
 
-int macb_miiphy_read(char *devname, u8 phy_adr, u8 reg, u16 *value)
+int macb_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value)
 {
 	struct eth_device *dev = eth_get_dev_by_name(devname);
 	struct macb_device *macb = to_macb(dev);
@@ -180,7 +180,7 @@
 	return 0;
 }
 
-int macb_miiphy_write(char *devname, u8 phy_adr, u8 reg, u16 value)
+int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
 {
 	struct eth_device *dev = eth_get_dev_by_name(devname);
 	struct macb_device *macb = to_macb(dev);
diff --git a/drivers/net/mcfmii.c b/drivers/net/mcfmii.c
index 060bdd7..401182d 100644
--- a/drivers/net/mcfmii.c
+++ b/drivers/net/mcfmii.c
@@ -293,7 +293,7 @@
  *	  Otherwise they hang in mii_send() !!! Sorry!
  */
 
-int mcffec_miiphy_read(char *devname, unsigned char addr, unsigned char reg,
+int mcffec_miiphy_read(const char *devname, unsigned char addr, unsigned char reg,
 		       unsigned short *value)
 {
 	short rdreg;		/* register working value */
@@ -312,7 +312,7 @@
 	return 0;
 }
 
-int mcffec_miiphy_write(char *devname, unsigned char addr, unsigned char reg,
+int mcffec_miiphy_write(const char *devname, unsigned char addr, unsigned char reg,
 			unsigned short value)
 {
 	short rdreg;		/* register working value */
diff --git a/drivers/net/mpc512x_fec.c b/drivers/net/mpc512x_fec.c
index 6ea4a2b..f56d940 100644
--- a/drivers/net/mpc512x_fec.c
+++ b/drivers/net/mpc512x_fec.c
@@ -25,8 +25,8 @@
 #error "CONFIG_MII has to be defined!"
 #endif
 
-int fec512x_miiphy_read(char *devname, u8 phyAddr, u8 regAddr, u16 * retVal);
-int fec512x_miiphy_write(char *devname, u8 phyAddr, u8 regAddr, u16 data);
+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 mpc512x_fec_init_phy(struct eth_device *dev, bd_t * bis);
 
 static uchar rx_buff[FEC_BUFFER_SIZE];
@@ -672,7 +672,7 @@
 
 /* MII-interface related functions */
 /********************************************************************/
-int fec512x_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal)
+int fec512x_miiphy_read(const char *devname, u8 phyAddr, u8 regAddr, u16 *retVal)
 {
 	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
 	volatile fec512x_t *eth = &im->fec;
@@ -719,7 +719,7 @@
 }
 
 /********************************************************************/
-int fec512x_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data)
+int fec512x_miiphy_write(const char *devname, u8 phyAddr, u8 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 4a1c8e6..c88e596 100644
--- a/drivers/net/mpc5xxx_fec.c
+++ b/drivers/net/mpc5xxx_fec.c
@@ -35,8 +35,8 @@
     uint8 head[16];             /* MAC header(6 + 6 + 2) + 2(aligned) */
 } NBUF;
 
-int fec5xxx_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal);
-int fec5xxx_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data);
+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);
 
 static int mpc5xxx_fec_init_phy(struct eth_device *dev, bd_t * bis);
 
@@ -941,7 +941,7 @@
 
 /* MII-interface related functions */
 /********************************************************************/
-int fec5xxx_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal)
+int fec5xxx_miiphy_read(const char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal)
 {
 	ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
 	uint32 reg;		/* convenient holder for the PHY register */
@@ -983,7 +983,7 @@
 }
 
 /********************************************************************/
-int fec5xxx_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data)
+int fec5xxx_miiphy_write(const char *devname, uint8 phyAddr, uint8 regAddr, uint16 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 cad4023..c701f43 100644
--- a/drivers/net/mvgbe.c
+++ b/drivers/net/mvgbe.c
@@ -54,7 +54,7 @@
  *
  * Returns 16bit phy register value, or 0xffff on error
  */
-static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
+static int smi_reg_read(const char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
 {
 	struct eth_device *dev = eth_get_dev_by_name(devname);
 	struct mvgbe_device *dmvgbe = to_mvgbe(dev);
@@ -131,7 +131,7 @@
  * Returns 0 if write succeed, -EINVAL on bad parameters
  * -ETIME on timeout
  */
-static int smi_reg_write(char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
+static int smi_reg_write(const char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
 {
 	struct eth_device *dev = eth_get_dev_by_name(devname);
 	struct mvgbe_device *dmvgbe = to_mvgbe(dev);
diff --git a/drivers/net/ns7520_eth.c b/drivers/net/ns7520_eth.c
index c28726e..bfa651b 100644
--- a/drivers/net/ns7520_eth.c
+++ b/drivers/net/ns7520_eth.c
@@ -761,7 +761,7 @@
 /**
  * Read a 16-bit value from an MII register.
  */
-extern int ns7520_miiphy_read(char *devname, unsigned char const addr,
+extern int ns7520_miiphy_read(const char *devname, unsigned char const addr,
 		unsigned char const reg, unsigned short *const value)
 {
 	int ret = MII_STATUS_FAILURE;
@@ -807,7 +807,7 @@
 /**
  * Write a 16-bit value to an MII register.
  */
-extern int ns7520_miiphy_write(char *devname, unsigned char const addr,
+extern int ns7520_miiphy_write(const char *devname, unsigned char const addr,
 		unsigned char const reg, unsigned short const value)
 {
 	int ret = MII_STATUS_FAILURE;
diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index 54c4a70..9b5dd92 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -60,9 +60,9 @@
 static void adjust_link(struct eth_device *dev);
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) \
 	&& !defined(BITBANGMII)
-static int tsec_miiphy_write(char *devname, unsigned char addr,
+static int tsec_miiphy_write(const char *devname, unsigned char addr,
 			     unsigned char reg, unsigned short value);
-static int tsec_miiphy_read(char *devname, unsigned char addr,
+static int tsec_miiphy_read(const char *devname, unsigned char addr,
 			    unsigned char reg, unsigned short *value);
 #endif
 #ifdef CONFIG_MCAST_TFTP
@@ -1919,7 +1919,7 @@
  * Returns:
  *  0 on success
  */
-static int tsec_miiphy_read(char *devname, unsigned char addr,
+static int tsec_miiphy_read(const char *devname, unsigned char addr,
 			    unsigned char reg, unsigned short *value)
 {
 	unsigned short ret;
@@ -1942,7 +1942,7 @@
  * Returns:
  *  0 on success
  */
-static int tsec_miiphy_write(char *devname, unsigned char addr,
+static int tsec_miiphy_write(const char *devname, unsigned char addr,
 			     unsigned char reg, unsigned short value)
 {
 	struct tsec_private *priv = privlist[0];