diff --git a/arch/arm/cpu/arm920t/at91rm9200/ether.c b/arch/arm/cpu/arm920t/at91rm9200/ether.c
index 91eab95..e1cdeba 100644
--- a/arch/arm/cpu/arm920t/at91rm9200/ether.c
+++ b/arch/arm/cpu/arm920t/at91rm9200/ether.c
@@ -283,7 +283,7 @@
 };
 
 #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 @@
 	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 3d6f727..b5eef86 100644
--- a/arch/arm/cpu/ixp/npe/include/npe.h
+++ b/arch/arm/cpu/ixp/npe/include/npe.h
@@ -82,9 +82,9 @@
 /*
  * 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 b208c51..4b0201a 100644
--- a/arch/arm/cpu/ixp/npe/miiphy.c
+++ b/arch/arm/cpu/ixp/npe/miiphy.c
@@ -100,7 +100,7 @@
 }
 
 
-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 @@
 }				/* 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);