miiphy: constify device name

The driver name does not need to be writable, so constify it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

30 files changed, 107 insertions, 106 deletions

diff --git a/arch/arm/cpu/arm920t/at91rm9200/ether.c b/arch/arm/cpu/arm920t/at91rm9200/ether.c
index 91eab95eed..e1cdebab9d 100644
--- a/arch/arm/cpu/arm920t/at91rm9200/ether.c
+++ b/arch/arm/cpu/arm920t/at91rm9200/ether.c
@@ -283,7 +283,7 @@ void eth_halt (void)
 };
 
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-int  at91rm9200_miiphy_read(char *devname, unsigned char addr,
+int  at91rm9200_miiphy_read(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short * value)
 {
 	at91rm9200_EmacEnableMDIO (p_mac);
@@ -292,7 +292,7 @@ int  at91rm9200_miiphy_read(char *devname, unsigned char addr,
 	return 0;
 }
 
-int  at91rm9200_miiphy_write(char *devname, unsigned char addr,
+int  at91rm9200_miiphy_write(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short value)
 {
 	at91rm9200_EmacEnableMDIO (p_mac);
diff --git a/arch/arm/cpu/ixp/npe/include/npe.h b/arch/arm/cpu/ixp/npe/include/npe.h
index 3d6f727476..b5eef8633f 100644
--- a/arch/arm/cpu/ixp/npe/include/npe.h
+++ b/arch/arm/cpu/ixp/npe/include/npe.h
@@ -82,9 +82,9 @@ struct npe {
 /*
  * prototypes...
  */
-extern int npe_miiphy_read (char *devname, unsigned char addr,
+extern int npe_miiphy_read (const char *devname, unsigned char addr,
 			    unsigned char reg, unsigned short *value);
-extern int npe_miiphy_write (char *devname, unsigned char addr,
+extern int npe_miiphy_write (const char *devname, unsigned char addr,
 			     unsigned char reg, unsigned short value);
 
 #endif /* ifndef NPE_H */
diff --git a/arch/arm/cpu/ixp/npe/miiphy.c b/arch/arm/cpu/ixp/npe/miiphy.c
index b208c51eae..4b0201a357 100644
--- a/arch/arm/cpu/ixp/npe/miiphy.c
+++ b/arch/arm/cpu/ixp/npe/miiphy.c
@@ -100,7 +100,7 @@ int phy_setup_aneg (char *devname, unsigned char addr)
 }
 
 
-int npe_miiphy_read (char *devname, unsigned char addr,
+int npe_miiphy_read (const char *devname, unsigned char addr,
 		     unsigned char reg, unsigned short *value)
 {
 	u16 val;
@@ -112,7 +112,7 @@ int npe_miiphy_read (char *devname, unsigned char addr,
 }				/* phy_read */
 
 
-int npe_miiphy_write (char *devname, unsigned char addr,
+int npe_miiphy_write (const char *devname, unsigned char addr,
 		      unsigned char reg, unsigned short value)
 {
 	ixEthAccMiiWriteRtn(addr, reg, value);
diff --git a/arch/m68k/include/asm/fec.h b/arch/m68k/include/asm/fec.h
index 49311e596f..cecec59ff6 100644
--- a/arch/m68k/include/asm/fec.h
+++ b/arch/m68k/include/asm/fec.h
@@ -357,9 +357,9 @@ int fecpin_setclear(struct eth_device *dev, int setclear);
 void __mii_init(void);
 uint mii_send(uint mii_cmd);
 int mii_discover_phy(struct eth_device *dev);
-int mcffec_miiphy_read(char *devname, unsigned char addr,
+int mcffec_miiphy_read(const char *devname, unsigned char addr,
 		       unsigned char reg, unsigned short *value);
-int mcffec_miiphy_write(char *devname, unsigned char addr,
+int mcffec_miiphy_write(const char *devname, unsigned char addr,
 			unsigned char reg, unsigned short value);
 #endif
 
diff --git a/arch/mips/cpu/au1x00_eth.c b/arch/mips/cpu/au1x00_eth.c
index 5074997a29..c51079961c 100644
--- a/arch/mips/cpu/au1x00_eth.c
+++ b/arch/mips/cpu/au1x00_eth.c
@@ -89,7 +89,7 @@ mac_fifo_t mac_fifo[NO_OF_FIFOS];
 #define MAX_WAIT 1000
 
 #if defined(CONFIG_CMD_MII)
-int  au1x00_miiphy_read(char *devname, unsigned char addr,
+int  au1x00_miiphy_read(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short * value)
 {
 	volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
@@ -122,7 +122,7 @@ int  au1x00_miiphy_read(char *devname, unsigned char addr,
 	return 0;
 }
 
-int  au1x00_miiphy_write(char *devname, unsigned char addr,
+int  au1x00_miiphy_write(const char *devname, unsigned char addr,
 		unsigned char reg, unsigned short value)
 {
 	volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
diff --git a/arch/powerpc/cpu/mpc8220/fec.c b/arch/powerpc/cpu/mpc8220/fec.c
index 9a6d434dba..00879dff5c 100644
--- a/arch/powerpc/cpu/mpc8220/fec.c
+++ b/arch/powerpc/cpu/mpc8220/fec.c
@@ -34,8 +34,8 @@ typedef struct {
 	u8 head[16];		/* MAC header(6 + 6 + 2) + 2(aligned) */
 } NBUF;
 
-int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal);
-int fec8220_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data);
+int fec8220_miiphy_read (const char *devname, u8 phyAddr, u8 regAddr, u16 *retVal);
+int fec8220_miiphy_write (const char *devname, u8 phyAddr, u8 regAddr, u16 data);
 
 /********************************************************************/
 #ifdef DEBUG
@@ -881,7 +881,7 @@ int mpc8220_fec_initialize (bd_t * bis)
 
 /* MII-interface related functions */
 /********************************************************************/
-int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal)
+int fec8220_miiphy_read (const char *devname, u8 phyAddr, u8 regAddr, u16 *retVal)
 {
 	ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
 	u32 reg;		/* convenient holder for the PHY register */
@@ -925,7 +925,7 @@ int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal)
 }
 
 /********************************************************************/
-int fec8220_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data)
+int fec8220_miiphy_write(const char *devname, u8 phyAddr, u8 regAddr, u16 data)
 {
 	ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
 	u32 reg;		/* convenient holder for the PHY register */
diff --git a/arch/powerpc/cpu/mpc8xx/fec.c b/arch/powerpc/cpu/mpc8xx/fec.c
index 754f8db9ed..d4abeb1b2f 100644
--- a/arch/powerpc/cpu/mpc8xx/fec.c
+++ b/arch/powerpc/cpu/mpc8xx/fec.c
@@ -63,9 +63,9 @@ DECLARE_GLOBAL_DATA_PTR;
 static int mii_discover_phy(struct eth_device *dev);
 #endif
 
-int fec8xx_miiphy_read(char *devname, unsigned char addr,
+int fec8xx_miiphy_read(const char *devname, unsigned char addr,
 		unsigned char  reg, unsigned short *value);
-int fec8xx_miiphy_write(char *devname, unsigned char  addr,
+int fec8xx_miiphy_write(const char *devname, unsigned char  addr,
 		unsigned char  reg, unsigned short value);
 
 static struct ether_fcc_info_s
@@ -990,7 +990,7 @@ void mii_init (void)
  *	  Otherwise they hang in mii_send() !!! Sorry!
  *****************************************************************************/
 
-int fec8xx_miiphy_read(char *devname, unsigned char addr,
+int fec8xx_miiphy_read(const char *devname, unsigned char addr,
 		unsigned char  reg, unsigned short *value)
 {
 	short rdreg;    /* register working value */
@@ -1007,7 +1007,7 @@ int fec8xx_miiphy_read(char *devname, unsigned char addr,
 	return 0;
 }
 
-int fec8xx_miiphy_write(char *devname, unsigned char  addr,
+int fec8xx_miiphy_write(const char *devname, unsigned char  addr,
 		unsigned char  reg, unsigned short value)
 {
 	short rdreg;    /* register working value */
diff --git a/arch/powerpc/cpu/ppc4xx/miiphy.c b/arch/powerpc/cpu/ppc4xx/miiphy.c
index 22ed5c25ea..4fec126f40 100644
--- a/arch/powerpc/cpu/ppc4xx/miiphy.c
+++ b/arch/powerpc/cpu/ppc4xx/miiphy.c
@@ -338,7 +338,7 @@ static int emac_miiphy_command(u8 addr, u8 reg, int cmd, u16 value)
 	return 0;
 }
 
-int emac4xx_miiphy_read (char *devname, unsigned char addr, unsigned char reg,
+int emac4xx_miiphy_read (const char *devname, unsigned char addr, unsigned char reg,
 			 unsigned short *value)
 {
 	unsigned long sta_reg;
@@ -359,7 +359,7 @@ int emac4xx_miiphy_read (char *devname, unsigned char addr, unsigned char reg,
 /* write a phy reg and return the value with a rc	    */
 /***********************************************************/
 
-int emac4xx_miiphy_write (char *devname, unsigned char addr, unsigned char reg,
+int emac4xx_miiphy_write (const char *devname, unsigned char addr, unsigned char reg,
 			  unsigned short value)
 {
 	return emac_miiphy_command(addr, reg, EMAC_STACR_WRITE, value);
diff --git a/board/evb64260/eth.c b/board/evb64260/eth.c
index 8d1b606213..a96e65590f 100644
--- a/board/evb64260/eth.c
+++ b/board/evb64260/eth.c
@@ -89,7 +89,7 @@ static const char ether_port_phy_addr[3]={4,5,6};
 /* MII PHY access routines are common for all i/f, use gal_ent0 */
 #define GT6426x_MII_DEVNAME	"gal_enet0"
 
-int gt6426x_miiphy_read(char *devname, unsigned char phy,
+int gt6426x_miiphy_read(const char *devname, unsigned char phy,
 		unsigned char reg, unsigned short *val);
 
 static inline unsigned short
@@ -345,7 +345,7 @@ gt6426x_eth_disable(void *v)
 MII utilities - write: write to an MII register via SMI
 ***************************************************************************/
 int
-gt6426x_miiphy_write(char *devname, unsigned char phy,
+gt6426x_miiphy_write(const char *devname, unsigned char phy,
 		unsigned char reg, unsigned short data)
 {
     unsigned int temp= (reg<<21) | (phy<<16) | data;
@@ -360,7 +360,7 @@ gt6426x_miiphy_write(char *devname, unsigned char phy,
 MII utilities - read: read from an MII register via SMI
 ***************************************************************************/
 int
-gt6426x_miiphy_read(char *devname, unsigned char phy,
+gt6426x_miiphy_read(const char *devname, unsigned char phy,
 		unsigned char reg, unsigned short *val)
 {
     unsigned int temp= (reg<<21) | (phy<<16) | 1<<26;
diff --git a/board/prodrive/p3mx/mv_eth.c b/board/prodrive/p3mx/mv_eth.c
index e67596bd1a..567ae99d06 100644
--- a/board/prodrive/p3mx/mv_eth.c
+++ b/board/prodrive/p3mx/mv_eth.c
@@ -99,9 +99,9 @@ int mv64460_eth_receive (struct eth_device *dev);
 
 int mv64460_eth_xmit (struct eth_device *, volatile void *packet, int length);
 
-int mv_miiphy_read(char *devname, unsigned char phy_addr,
+int mv_miiphy_read(const char *devname, unsigned char phy_addr,
 		   unsigned char phy_reg, unsigned short *value);
-int mv_miiphy_write(char *devname, unsigned char phy_addr,
+int mv_miiphy_write(const char *devname, unsigned char phy_addr,
 		    unsigned char phy_reg, unsigned short value);
 
 int phy_setup_aneg (char *devname, unsigned char addr);
@@ -2544,7 +2544,7 @@ static bool eth_port_read_smi_reg (ETH_PORT eth_port_num,
 	return true;
 }
 
-int mv_miiphy_read(char *devname, unsigned char phy_addr,
+int mv_miiphy_read(const char *devname, unsigned char phy_addr,
 		   unsigned char phy_reg, unsigned short *value)
 {
 	unsigned int reg_value;
@@ -2629,7 +2629,7 @@ static bool eth_port_write_smi_reg (ETH_PORT eth_port_num,
 	return true;
 }
 
-int mv_miiphy_write(char *devname, unsigned char phy_addr,
+int mv_miiphy_write(const char *devname, unsigned char phy_addr,
 		    unsigned char phy_reg, unsigned short value)
 {
 	unsigned int reg_value;
diff --git a/common/cmd_mii.c b/common/cmd_mii.c
index bb941862db..3ea493ba49 100644
--- a/common/cmd_mii.c
+++ b/common/cmd_mii.c
@@ -299,7 +299,7 @@ int do_mii (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 	unsigned char	addr, reg;
 	unsigned short	data;
 	int		rcode = 0;
-	char		*devname;
+	const char	*devname;
 
 	if (argc < 2)
 		return cmd_usage(cmdtp);
diff --git a/common/miiphyutil.c b/common/miiphyutil.c
index 4b186dd28c..a299b129a2 100644
--- a/common/miiphyutil.c
+++ b/common/miiphyutil.c
@@ -46,10 +46,10 @@
 
 struct mii_dev {
 	struct list_head link;
-	char *name;
-	int (*read) (char *devname, unsigned char addr,
+	const char *name;
+	int (*read) (const char *devname, unsigned char addr,
 		     unsigned char reg, unsigned short *value);
-	int (*write) (char *devname, unsigned char addr,
+	int (*write) (const char *devname, unsigned char addr,
 		      unsigned char reg, unsigned short value);
 };
 
@@ -60,7 +60,7 @@ static struct mii_dev *current_mii;
  *
  * Initialize global data. Need to be called before any other miiphy routine.
  */
-void miiphy_init ()
+void miiphy_init(void)
 {
 	INIT_LIST_HEAD (&mii_devs);
 	current_mii = NULL;
@@ -70,16 +70,17 @@ void miiphy_init ()
  *
  * Register read and write MII access routines for the device <name>.
  */
-void miiphy_register (char *name,
-		      int (*read) (char *devname, unsigned char addr,
+void miiphy_register(const char *name,
+		      int (*read) (const char *devname, unsigned char addr,
 				   unsigned char reg, unsigned short *value),
-		      int (*write) (char *devname, unsigned char addr,
+		      int (*write) (const char *devname, unsigned char addr,
 				    unsigned char reg, unsigned short value))
 {
 	struct list_head *entry;
 	struct mii_dev *new_dev;
 	struct mii_dev *miidev;
 	unsigned int name_len;
+	char *new_name;
 
 	/* check if we have unique name */
 	list_for_each (entry, &mii_devs) {
@@ -107,9 +108,9 @@ void miiphy_register (char *name,
 	INIT_LIST_HEAD (&new_dev->link);
 	new_dev->read = read;
 	new_dev->write = write;
-	new_dev->name = (char *)(new_dev + 1);
-	strncpy (new_dev->name, name, name_len);
-	new_dev->name[name_len] = '\0';
+	new_dev->name = new_name = (char *)(new_dev + 1);
+	strncpy (new_name, name, name_len);
+	new_name[name_len] = '\0';
 
 	debug ("miiphy_register: added '%s', read=0x%08lx, write=0x%08lx\n",
 	       new_dev->name, new_dev->read, new_dev->write);
@@ -121,7 +122,7 @@ void miiphy_register (char *name,
 		current_mii = new_dev;
 }
 
-int miiphy_set_current_dev (char *devname)
+int miiphy_set_current_dev(const char *devname)
 {
 	struct list_head *entry;
 	struct mii_dev *dev;
@@ -139,7 +140,7 @@ int miiphy_set_current_dev (char *devname)
 	return 1;
 }
 
-char *miiphy_get_current_dev ()
+const char *miiphy_get_current_dev(void)
 {
 	if (current_mii)
 		return current_mii->name;
@@ -155,7 +156,7 @@ char *miiphy_get_current_dev ()
  * Returns:
  *   0 on success
  */
-int miiphy_read (char *devname, unsigned char addr, unsigned char reg,
+int miiphy_read(const char *devname, unsigned char addr, unsigned char reg,
 		 unsigned short *value)
 {
 	struct list_head *entry;
@@ -192,7 +193,7 @@ int miiphy_read (char *devname, unsigned char addr, unsigned char reg,
  * Returns:
  *   0 on success
  */
-int miiphy_write (char *devname, unsigned char addr, unsigned char reg,
+int miiphy_write(const char *devname, unsigned char addr, unsigned char reg,
 		  unsigned short value)
 {
 	struct list_head *entry;
@@ -252,7 +253,7 @@ void miiphy_listdev (void)
  * Returns:
  *   0 on success
  */
-int miiphy_info (char *devname, unsigned char addr, unsigned int *oui,
+int miiphy_info(const char *devname, unsigned char addr, unsigned int *oui,
 		 unsigned char *model, unsigned char *rev)
 {
 	unsigned int reg = 0;
@@ -290,7 +291,7 @@ int miiphy_info (char *devname, unsigned char addr, unsigned int *oui,
  * Returns:
  *   0 on success
  */
-int miiphy_reset (char *devname, unsigned char addr)
+int miiphy_reset(const char *devname, unsigned char addr)
 {
 	unsigned short reg;
 	int timeout = 500;
@@ -332,7 +333,7 @@ int miiphy_reset (char *devname, unsigned char addr)
  *
  * Determine the ethernet speed (10/100/1000).  Return 10 on error.
  */
-int miiphy_speed (char *devname, unsigned char addr)
+int miiphy_speed(const char *devname, unsigned char addr)
 {
 	u16 bmcr, anlpar;
 
@@ -386,7 +387,7 @@ miiphy_read_failed:
  *
  * Determine full/half duplex.  Return half on error.
  */
-int miiphy_duplex (char *devname, unsigned char addr)
+int miiphy_duplex(const char *devname, unsigned char addr)
 {
 	u16 bmcr, anlpar;
 
@@ -446,7 +447,7 @@ miiphy_read_failed:
  * Return 1 if PHY supports 1000BASE-X, 0 if PHY supports 10BASE-T/100BASE-TX/
  * 1000BASE-T, or on error.
  */
-int miiphy_is_1000base_x (char *devname, unsigned char addr)
+int miiphy_is_1000base_x(const char *devname, unsigned char addr)
 {
 #if defined(CONFIG_PHY_GIGE)
 	u16 exsr;
@@ -467,7 +468,7 @@ int miiphy_is_1000base_x (char *devname, unsigned char addr)
  *
  * Determine link status
  */
-int miiphy_link (char *devname, unsigned char addr)
+int miiphy_link(const char *devname, unsigned char addr)
 {
 	unsigned short reg;
 
diff --git a/drivers/net/4xx_enet.c b/drivers/net/4xx_enet.c
index 144b851357..d9487ad732 100644
--- a/drivers/net/4xx_enet.c
+++ b/drivers/net/4xx_enet.c
@@ -305,9 +305,9 @@ static void mal_err (struct eth_device *dev, unsigned long isr,
 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 5c0c274ba3..d45aab1306 100644
--- a/drivers/net/altera_tse.c
+++ b/drivers/net/altera_tse.c
@@ -426,7 +426,7 @@ static int tse_mdio_write(struct altera_tse_priv *priv, unsigned int regnum,
 
 /* 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 @@ static int altera_tse_miiphy_write(char *devname, unsigned char addr,
 	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 245da121b9..0912f52822 100644
--- a/drivers/net/at91_emac.c
+++ b/drivers/net/at91_emac.c
@@ -170,7 +170,7 @@ at91_emac_t *get_emacbase_by_name(char *devname)
 	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_read(char *devname, unsigned char addr,
 }
 
 
-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 e691bdf211..36d4046ec1 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -71,7 +71,7 @@ static int bfin_miiphy_wait(void)
 	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 @@ static int bfin_miiphy_read(char *devname, uchar addr, uchar reg, ushort *val)
 	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 02bbb8c0af..41a9910919 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -252,12 +252,12 @@ static int gen_auto_negotiate(int phy_addr)
 
 
 #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 d0d98277ea..2f923f26f9 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -451,7 +451,7 @@ static int configure_phy(struct eth_device *dev)
 }
 
 #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 @@ static int dw_mii_read(char *devname, u8 addr, u8 reg, u16 *val)
 	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 9c06b25569..5cb767a795 100644
--- a/drivers/net/eepro100.c
+++ b/drivers/net/eepro100.c
@@ -350,7 +350,7 @@ static struct eth_device* verify_phyaddr (char *devname, unsigned char addr)
 	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 @@ static int eepro100_miiphy_read (char *devname, unsigned char addr,
 	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 4e39948d2f..c09384c632 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 @@ eth_init_done:
 /**
  * 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 @@ static int ep93xx_miiphy_read(char * const dev, unsigned char const addr,
 /**
  * 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 6b801ce24a..2d4ffed4fa 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -62,7 +62,7 @@ struct fec_priv gfec = {
 /*
  * 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 @@ static void fec_mii_setspeed(struct fec_priv *fec)
 	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 6a58a374b2..acb8d20b13 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -167,7 +167,7 @@ static u16 macb_mdio_read(struct macb_device *macb, u8 reg)
 
 #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 @@ int macb_miiphy_read(char *devname, u8 phy_adr, u8 reg, u16 *value)
 	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 060bdd7397..401182d426 100644
--- a/drivers/net/mcfmii.c
+++ b/drivers/net/mcfmii.c
@@ -293,7 +293,7 @@ void __mii_init(void)
  *	  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 @@ int mcffec_miiphy_read(char *devname, unsigned char addr, unsigned char reg,
 	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 6ea4a2b342..f56d940f91 100644
--- a/drivers/net/mpc512x_fec.c
+++ b/drivers/net/mpc512x_fec.c
@@ -25,8 +25,8 @@ DECLARE_GLOBAL_DATA_PTR;
 #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 @@ int mpc512x_fec_initialize (bd_t * bis)
 
 /* 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_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal)
 }
 
 /********************************************************************/
-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 4a1c8e6e42..c88e596c01 100644
--- a/drivers/net/mpc5xxx_fec.c
+++ b/drivers/net/mpc5xxx_fec.c
@@ -35,8 +35,8 @@ typedef struct {
     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 @@ int mpc5xxx_fec_initialize(bd_t * bis)
 
 /* 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_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * re
 }
 
 /********************************************************************/
-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 cad40237c9..c701f43ad6 100644
--- a/drivers/net/mvgbe.c
+++ b/drivers/net/mvgbe.c
@@ -54,7 +54,7 @@ DECLARE_GLOBAL_DATA_PTR;
  *
  * 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 @@ static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
  * 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 c28726e698..bfa651b7bf 100644
--- a/drivers/net/ns7520_eth.c
+++ b/drivers/net/ns7520_eth.c
@@ -761,7 +761,7 @@ enum mii_status {
 /**
  * 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 @@ extern int ns7520_miiphy_read(char *devname, unsigned char const addr,
 /**
  * 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 54c4a704a5..9b5dd92fbb 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -60,9 +60,9 @@ static void phy_run_commands(struct tsec_private *priv, struct phy_cmd *cmd);
 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 @@ static void phy_run_commands(struct tsec_private *priv, struct phy_cmd *cmd)
  * 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 @@ static int tsec_miiphy_read(char *devname, unsigned char addr,
  * 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];
diff --git a/drivers/qe/uec.c b/drivers/qe/uec.c
index 3e92fe95a6..e10c0f328c 100644
--- a/drivers/qe/uec.c
+++ b/drivers/qe/uec.c
@@ -603,7 +603,7 @@ static void phy_change(struct eth_device *dev)
  * Returns:
  *  The index where the device is located, -1 on error
  */
-static int uec_miiphy_find_dev_by_name(char *devname)
+static int uec_miiphy_find_dev_by_name(const char *devname)
 {
 	int i;
 
@@ -628,7 +628,7 @@ static int uec_miiphy_find_dev_by_name(char *devname)
  * Returns:
  *  0 on success
  */
-static int uec_miiphy_read(char *devname, unsigned char addr,
+static int uec_miiphy_read(const char *devname, unsigned char addr,
 			    unsigned char reg, unsigned short *value)
 {
 	int devindex = 0;
@@ -650,7 +650,7 @@ static int uec_miiphy_read(char *devname, unsigned char addr,
  * Returns:
  *  0 on success
  */
-static int uec_miiphy_write(char *devname, unsigned char addr,
+static int uec_miiphy_write(const char *devname, unsigned char addr,
 			     unsigned char reg, unsigned short value)
 {
 	int devindex = 0;
diff --git a/include/miiphy.h b/include/miiphy.h
index 5362125233..2f7d915526 100644
--- a/include/miiphy.h
+++ b/include/miiphy.h
@@ -36,30 +36,30 @@
 
 #include <net.h>
 
-int miiphy_read (char *devname, unsigned char addr, unsigned char reg,
+int miiphy_read (const char *devname, unsigned char addr, unsigned char reg,
 		 unsigned short *value);
-int miiphy_write (char *devname, unsigned char addr, unsigned char reg,
+int miiphy_write (const char *devname, unsigned char addr, unsigned char reg,
 		  unsigned short value);
-int miiphy_info (char *devname, unsigned char addr, unsigned int *oui,
+int miiphy_info (const char *devname, unsigned char addr, unsigned int *oui,
 		 unsigned char *model, unsigned char *rev);
-int miiphy_reset (char *devname, unsigned char addr);
-int miiphy_speed (char *devname, unsigned char addr);
-int miiphy_duplex (char *devname, unsigned char addr);
-int miiphy_is_1000base_x (char *devname, unsigned char addr);
+int miiphy_reset (const char *devname, unsigned char addr);
+int miiphy_speed (const char *devname, unsigned char addr);
+int miiphy_duplex (const char *devname, unsigned char addr);
+int miiphy_is_1000base_x (const char *devname, unsigned char addr);
 #ifdef CONFIG_SYS_FAULT_ECHO_LINK_DOWN
-int miiphy_link (char *devname, unsigned char addr);
+int miiphy_link (const char *devname, unsigned char addr);
 #endif
 
 void miiphy_init (void);
 
-void miiphy_register (char *devname,
-		      int (*read) (char *devname, unsigned char addr,
+void miiphy_register (const char *devname,
+		      int (*read) (const char *devname, unsigned char addr,
 				   unsigned char reg, unsigned short *value),
-		      int (*write) (char *devname, unsigned char addr,
+		      int (*write) (const char *devname, unsigned char addr,
 				    unsigned char reg, unsigned short value));
 
-int miiphy_set_current_dev (char *devname);
-char *miiphy_get_current_dev (void);
+int miiphy_set_current_dev (const char *devname);
+const char *miiphy_get_current_dev (void);
 
 void miiphy_listdev (void);
 
@@ -85,9 +85,9 @@ extern struct bb_miiphy_bus bb_miiphy_buses[];
 extern int bb_miiphy_buses_num;
 
 void bb_miiphy_init (void);
-int bb_miiphy_read (char *devname, unsigned char addr,
+int bb_miiphy_read (const char *devname, unsigned char addr,
 		    unsigned char reg, unsigned short *value);
-int bb_miiphy_write (char *devname, unsigned char addr,
+int bb_miiphy_write (const char *devname, unsigned char addr,
 		     unsigned char reg, unsigned short value);
 #endif