diff --git a/include/asm-sparc/idprom.h b/include/asm-sparc/idprom.h
index d856e64..59083ed 100644
--- a/include/asm-sparc/idprom.h
+++ b/include/asm-sparc/idprom.h
@@ -7,27 +7,19 @@
 #ifndef _SPARC_IDPROM_H
 #define _SPARC_IDPROM_H
 
-/* Offset into the EEPROM where the id PROM is located on the 4c */
-#define IDPROM_OFFSET  0x7d8
+#include <linux/types.h>
 
-/* On sun4m; physical. */
-/* MicroSPARC(-II) does not decode 31rd bit, but it works. */
-#define IDPROM_OFFSET_M  0xfd8
-
-struct idprom
-{
-	unsigned char	id_format;	/* Format identifier (always 0x01) */
-	unsigned char	id_machtype;	/* Machine type */
-	unsigned char	id_ethaddr[6];	/* Hardware ethernet address */
-	long		id_date;	/* Date of manufacture */
-	unsigned int	id_sernum:24;	/* Unique serial number */
-	unsigned char	id_cksum;	/* Checksum - xor of the data bytes */
-	unsigned char	reserved[16];
+struct idprom {
+	u8		id_format;	/* Format identifier (always 0x01) */
+	u8		id_machtype;	/* Machine type */
+	u8		id_ethaddr[6];	/* Hardware ethernet address */
+	s32		id_date;	/* Date of manufacture */
+	u32		id_sernum:24;	/* Unique serial number */
+	u8		id_cksum;	/* Checksum - xor of the data bytes */
+	u8		reserved[16];
 };
 
 extern struct idprom *idprom;
 extern void idprom_init(void);
 
-#define IDPROM_SIZE  (sizeof(struct idprom))
-
 #endif /* !(_SPARC_IDPROM_H) */