24 files changed, 67 insertions, 59 deletions

diff --git a/CHANGELOG b/CHANGELOG
index df48e47af4..964e2b1f55 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,8 @@
 Changes since U-Boot 1.1.4:
 ======================================================================
 
+* Some code cleanup for GCC 4.x
+
 * Fixes to support environment in NAND flash;
   enable NAND flash based environment for delta board.
 
diff --git a/board/at91rm9200dk/at45.c b/board/at91rm9200dk/at45.c
index 3c00132164..f886fe4820 100644
--- a/board/at91rm9200dk/at45.c
+++ b/board/at91rm9200dk/at45.c
@@ -593,7 +593,7 @@ int AT91F_DataFlashRead(
 		if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
 			return -1;
 
-		if (AT91F_DataFlashContinuousRead (pDataFlash, addr, buffer, SizeToRead) != DATAFLASH_OK)
+		if (AT91F_DataFlashContinuousRead (pDataFlash, addr, (uchar *)buffer, SizeToRead) != DATAFLASH_OK)
 			return -1;
 
 		size -= SizeToRead;
diff --git a/board/at91rm9200dk/flash.c b/board/at91rm9200dk/flash.c
index f6228ef03e..0513d61d73 100644
--- a/board/at91rm9200dk/flash.c
+++ b/board/at91rm9200dk/flash.c
@@ -393,8 +393,7 @@ outahere:
  * Copy memory to flash
  */
 
-volatile static int write_word (flash_info_t * info, ulong dest,
-								ulong data)
+static int write_word (flash_info_t * info, ulong dest, ulong data)
 {
 	volatile u16 *addr = (volatile u16 *) dest;
 	ulong result;
@@ -409,7 +408,6 @@ volatile static int write_word (flash_info_t * info, ulong dest,
 	if ((result & data) != data)
 		return ERR_NOT_ERASED;
 
-
 	/*
 	 * Disable interrupts which might cause a timeout
 	 * here. Remember that our exception vectors are
diff --git a/board/cmc_pu2/load_sernum_ethaddr.c b/board/cmc_pu2/load_sernum_ethaddr.c
index 94aa30df96..354566c05d 100644
--- a/board/cmc_pu2/load_sernum_ethaddr.c
+++ b/board/cmc_pu2/load_sernum_ethaddr.c
@@ -69,8 +69,8 @@ int i2c_read (unsigned char chip, unsigned int addr, int alen,
 void load_sernum_ethaddr (void)
 {
 	struct manufacturer_data data;
-	unsigned char  serial [9];
-	unsigned char  ethaddr[18];
+	char  ethaddr[18];
+	char  serial [9];
 	unsigned short chksum;
 	unsigned char *p;
 	unsigned short i, is, id;
diff --git a/board/delta/nand.c b/board/delta/nand.c
index 50def59090..c4df6e57eb 100644
--- a/board/delta/nand.c
+++ b/board/delta/nand.c
@@ -229,7 +229,7 @@ static void wait_us(unsigned long us)
 	}
 }
 
-static void dfc_clear_nddb()
+static void dfc_clear_nddb(void)
 {
 	NDCR &= ~NDCR_ND_RUN;
 	wait_us(CFG_NAND_OTHER_TO);
@@ -263,7 +263,7 @@ static unsigned long dfc_wait_event(unsigned long event)
 }
 
 /* we don't always wan't to do this */
-static void dfc_new_cmd()
+static void dfc_new_cmd(void)
 {
 	int retry = 0;
 	unsigned long status;
@@ -398,7 +398,7 @@ static void dfc_cmdfunc(struct mtd_info *mtd, unsigned command,
 	return;
 }
 
-static void dfc_gpio_init()
+static void dfc_gpio_init(void)
 {
 	DFC_DEBUG2("Setting up DFC GPIO's.\n");
 
diff --git a/board/lart/flash.c b/board/lart/flash.c
index 5232ed2586..28c4531c02 100644
--- a/board/lart/flash.c
+++ b/board/lart/flash.c
@@ -348,7 +348,7 @@ outahere:
  * Copy memory to flash
  */
 
-volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
+static int write_word (flash_info_t *info, ulong dest, ulong data)
 {
     vu_long *addr = (vu_long *)dest;
     ulong result;
diff --git a/board/lpd7a40x/flash.c b/board/lpd7a40x/flash.c
index 2dfe37656f..d18720e5b2 100644
--- a/board/lpd7a40x/flash.c
+++ b/board/lpd7a40x/flash.c
@@ -351,8 +351,7 @@ outahere:
  * Copy memory to flash
  */
 
-volatile static int write_word (flash_info_t * info, ulong dest,
-								ulong data)
+static int write_word (flash_info_t * info, ulong dest, ulong data)
 {
 	vu_long *addr = (vu_long *) dest;
 	ulong result;
diff --git a/board/netstar/crcek b/board/netstar/crcek
index 9593f893c8..491cceb2ed 100755
--- a/board/netstar/crcek
+++ b/board/netstar/crcek
diff --git a/board/netstar/eeprom b/board/netstar/eeprom
index c30c98b72c..e075eb4efd 100755
--- a/board/netstar/eeprom
+++ b/board/netstar/eeprom
diff --git a/board/netstar/flash.c b/board/netstar/flash.c
index f555c0c006..692c416780 100644
--- a/board/netstar/flash.c
+++ b/board/netstar/flash.c
@@ -230,7 +230,7 @@ out:
  * Copy memory to flash
  */
 
-volatile static int write_hword(flash_info_t *info, ulong dest, ushort data)
+static int write_hword(flash_info_t *info, ulong dest, ushort data)
 {
 	vu_short *addr = (vu_short *) dest;
 	ushort result;
diff --git a/board/netstar/nand.c b/board/netstar/nand.c
index e5b7f3346e..f470c1a01e 100644
--- a/board/netstar/nand.c
+++ b/board/netstar/nand.c
@@ -48,10 +48,12 @@ static void netstar_nand_hwcontrol(struct mtd_info *mtd, int cmd)
 /*
  *	chip R/B detection
  */
+/***
 static int netstar_nand_ready(struct mtd_info *mtd)
 {
 	return (*(volatile ushort *)GPIO_DATA_INPUT_REG) & 0x02;
 }
+***/
 
 void board_nand_init(struct nand_chip *nand)
 {
diff --git a/board/shannon/flash.c b/board/shannon/flash.c
index 13c01d8351..475b76b30b 100644
--- a/board/shannon/flash.c
+++ b/board/shannon/flash.c
@@ -315,7 +315,7 @@ outahere:
  * Copy memory to flash
  */
 
-volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
+static int write_word (flash_info_t *info, ulong dest, ulong data)
 {
     vu_long *addr = (vu_long *)dest;
     ulong result;
diff --git a/common/env_nand.c b/common/env_nand.c
index 4ae68c5a23..dd27f7b629 100644
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -112,7 +112,8 @@ int env_init(void)
  */
 int saveenv(void)
 {
-	int	total, ret = 0;
+	ulong total;
+	int ret = 0;
 
 	puts ("Erasing Nand...");
 	if (nand_erase(&nand_info[0], CFG_ENV_OFFSET, CFG_ENV_SIZE))
@@ -120,8 +121,7 @@ int saveenv(void)
 
 	puts ("Writing to Nand... ");
 	total = CFG_ENV_SIZE;
-	ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total,
-			(u_char*) env_ptr);
+	ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
 	if (ret || total != CFG_ENV_SIZE)
 		return 1;
 
@@ -138,11 +138,11 @@ int saveenv(void)
 void env_relocate_spec (void)
 {
 #if !defined(ENV_IS_EMBEDDED)
-	int ret, total;
+	ulong total;
+	int ret;
 
 	total = CFG_ENV_SIZE;
-	ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &total,
-			(u_char*) env_ptr);
+	ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
   	if (ret || total != CFG_ENV_SIZE)
 		return use_default();
 
diff --git a/cpu/arm920t/at91rm9200/i2c.c b/cpu/arm920t/at91rm9200/i2c.c
index 2565998e48..826cea8e26 100644
--- a/cpu/arm920t/at91rm9200/i2c.c
+++ b/cpu/arm920t/at91rm9200/i2c.c
@@ -111,7 +111,7 @@ at91_xfer(unsigned char chip, unsigned int addr, int alen,
 int
 i2c_probe(unsigned char chip)
 {
-	char buffer[1];
+	unsigned char buffer[1];
 
 	return at91_xfer(chip, 0, 0, buffer, 1, 1);
 }
@@ -191,7 +191,7 @@ i2c_init(int speed, int slaveaddr)
 
 uchar i2c_reg_read(uchar i2c_addr, uchar reg)
 {
-	char buf;
+	unsigned char buf;
 
 	i2c_read(i2c_addr, reg, 1, &buf, 1);
 
diff --git a/drivers/dataflash.c b/drivers/dataflash.c
index ded039578a..17eb8597f8 100644
--- a/drivers/dataflash.c
+++ b/drivers/dataflash.c
@@ -174,8 +174,7 @@ void dataflash_print_info (void)
 /* Function Name       : AT91F_DataflashSelect 					*/
 /* Object              : Select the correct device				*/
 /*------------------------------------------------------------------------------*/
-AT91PS_DataFlash AT91F_DataflashSelect (AT91PS_DataFlash pFlash,
-										unsigned int *addr)
+AT91PS_DataFlash AT91F_DataflashSelect (AT91PS_DataFlash pFlash, unsigned long *addr)
 {
 	char addr_valid = 0;
 	int i;
@@ -291,7 +290,7 @@ int i,j, area1, area2, addr_valid = 0;
 /*------------------------------------------------------------------------------*/
 int read_dataflash (unsigned long addr, unsigned long size, char *result)
 {
-	int AddrToRead = addr;
+	unsigned long AddrToRead = addr;
 	AT91PS_DataFlash pFlash = &DataFlashInst;
 
 	pFlash = AT91F_DataflashSelect (pFlash, &AddrToRead);
@@ -313,7 +312,7 @@ int read_dataflash (unsigned long addr, unsigned long size, char *result)
 int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
 		     unsigned long size)
 {
-	int AddrToWrite = addr_dest;
+	unsigned long AddrToWrite = addr_dest;
 	AT91PS_DataFlash pFlash = &DataFlashInst;
 
 	pFlash = AT91F_DataflashSelect (pFlash, &AddrToWrite);
@@ -330,7 +329,7 @@ int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
 	if (AddrToWrite == -1)
 		return -1;
 
-	return AT91F_DataFlashWrite (pFlash, (char *) addr_src, AddrToWrite, size);
+	return AT91F_DataFlashWrite (pFlash, (uchar *)addr_src, AddrToWrite, size);
 }
 
 
diff --git a/drivers/lan91c96.c b/drivers/lan91c96.c
index bb03dae39c..a50c5f0abe 100644
--- a/drivers/lan91c96.c
+++ b/drivers/lan91c96.c
@@ -185,21 +185,21 @@ static int smc_rcv (void);
  . If an EEPROM is present it really should be consulted.
 */
 int smc_get_ethaddr(bd_t *bd);
-int get_rom_mac(char *v_rom_mac);
+int get_rom_mac(unsigned char *v_rom_mac);
 
 /* ------------------------------------------------------------
  * Internal routines
  * ------------------------------------------------------------
  */
 
-static char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c };
+static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c };
 
 /*
  * This function must be called before smc_open() if you want to override
  * the default mac address.
  */
 
-void smc_set_mac_addr (const char *addr)
+void smc_set_mac_addr (const unsigned char *addr)
 {
 	int i;
 
@@ -883,7 +883,7 @@ int smc_get_ethaddr (bd_t * bd)
 	char *s = NULL;
 	char *e = NULL;
 	char *v_mac, es[] = "11:22:33:44:55:66";
-	uchar s_env_mac[64];
+	char s_env_mac[64];
 	uchar v_env_mac[6];
 	uchar v_rom_mac[6];
 
@@ -905,7 +905,7 @@ int smc_get_ethaddr (bd_t * bd)
 
 	if (!env_present) {	/* if NO env */
 		if (rom_valid) {	/* but ROM is valid */
-			v_mac = v_rom_mac;
+			v_mac = (char *)v_rom_mac;
 			sprintf (s_env_mac, "%02X:%02X:%02X:%02X:%02X:%02X",
 				 v_mac[0], v_mac[1], v_mac[2], v_mac[3],
 				 v_mac[4], v_mac[5]);
@@ -915,7 +915,7 @@ int smc_get_ethaddr (bd_t * bd)
 			return (-1);
 		}
 	} else {		/* good env, don't care ROM */
-		v_mac = v_env_mac;	/* always use a good env over a ROM */
+		v_mac = (char *)v_env_mac;	/* always use a good env over a ROM */
 	}
 
 	if (env_present && rom_valid) { /* if both env and ROM are good */
@@ -935,7 +935,7 @@ int smc_get_ethaddr (bd_t * bd)
 		}
 	}
 	memcpy (bd->bi_enetaddr, v_mac, 6);	/* update global address to match env (allows env changing) */
-	smc_set_mac_addr (v_mac);	/* use old function to update smc default */
+	smc_set_mac_addr ((unsigned char *)v_mac); /* use old function to update smc default */
 	PRINTK("Using MAC Address %02X:%02X:%02X:%02X:%02X:%02X\n", v_mac[0], v_mac[1],
 		v_mac[2], v_mac[3], v_mac[4], v_mac[5]);
 	return (0);
@@ -946,7 +946,7 @@ int smc_get_ethaddr (bd_t * bd)
  * Note, this has omly been tested for the OMAP730 P2.
  */
 
-int get_rom_mac (char *v_rom_mac)
+int get_rom_mac (unsigned char *v_rom_mac)
 {
 #ifdef HARDCODE_MAC	/* used for testing or to supress run time warnings */
 	char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 };
diff --git a/drivers/lan91c96.h b/drivers/lan91c96.h
index b7d7455b9d..7d33a821f3 100644
--- a/drivers/lan91c96.h
+++ b/drivers/lan91c96.h
@@ -51,7 +51,7 @@
  * in order to override the default mac address.
  */
 
-void smc_set_mac_addr(const char *addr);
+void smc_set_mac_addr(const unsigned char *addr);
 
 
 /* I want some simple types */
diff --git a/drivers/nand/nand_base.c b/drivers/nand/nand_base.c
index d91d90bfec..e0b406041f 100644
--- a/drivers/nand/nand_base.c
+++ b/drivers/nand/nand_base.c
@@ -897,7 +897,7 @@ static int nand_write_page (struct mtd_info *mtd, struct nand_chip *this, int pa
 	int 	i, status;
 	u_char	ecc_code[32];
 	int	eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE;
-	int  	*oob_config = oobsel->eccpos;
+	uint  	*oob_config = oobsel->eccpos;
 	int	datidx = 0, eccidx = 0, eccsteps = this->eccsteps;
 	int	eccbytes = 0;
 
@@ -1119,7 +1119,8 @@ static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
 	u_char ecc_calc[32];
 	u_char ecc_code[32];
 	int eccmode, eccsteps;
-	int	*oob_config, datidx;
+	unsigned *oob_config;
+	int	datidx;
 	int	blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
 	int	eccbytes;
 	int	compareecc = 1;
diff --git a/drivers/smc91111.c b/drivers/smc91111.c
index 060da8ff2a..84e243ddd5 100644
--- a/drivers/smc91111.c
+++ b/drivers/smc91111.c
@@ -210,7 +210,7 @@ static int smc_rcv(void);
  . If an EEPROM is present it really should be consulted.
 */
 int smc_get_ethaddr(bd_t *bd);
-int get_rom_mac(char *v_rom_mac);
+int get_rom_mac(uchar *v_rom_mac);
 
 /*
  ------------------------------------------------------------
@@ -276,17 +276,23 @@ static inline void SMC_outb(byte value, dword offset)
 
 static inline void SMC_insw(dword offset, volatile uchar* buf, dword len)
 {
+	volatile word *p = (volatile word *)buf;
+
 	while (len-- > 0) {
-		*((word*)buf)++ = SMC_inw(offset);
-		barrier(); *((volatile u32*)(0xc0000000));
+		*p++ = SMC_inw(offset);
+		barrier();
+		*((volatile u32*)(0xc0000000));
 	}
 }
 
 static inline void SMC_outsw(dword offset, uchar* buf, dword len)
 {
+	volatile word *p = (volatile word *)buf;
+
 	while (len-- > 0) {
-		SMC_outw(*((word*)buf)++, offset);
-		barrier(); *(volatile u32*)(0xc0000000);
+		SMC_outw(*p++, offset);
+		barrier();
+		*(volatile u32*)(0xc0000000);
 	}
 }
 #endif  /* CONFIG_SMC_USE_IOFUNCS */
@@ -298,7 +304,7 @@ static char unsigned smc_mac_addr[6] = {0x02, 0x80, 0xad, 0x20, 0x31, 0xb8};
  * the default mac address.
  */
 
-void smc_set_mac_addr(const char *addr) {
+void smc_set_mac_addr(const unsigned char *addr) {
 	int i;
 
 	for (i=0; i < sizeof(smc_mac_addr); i++){
@@ -1524,7 +1530,8 @@ int smc_get_ethaddr (bd_t * bd)
 {
 	int env_size, rom_valid, env_present = 0, reg;
 	char *s = NULL, *e, *v_mac, es[] = "11:22:33:44:55:66";
-	uchar s_env_mac[64], v_env_mac[6], v_rom_mac[6];
+	char s_env_mac[64];
+	uchar v_env_mac[6], v_rom_mac[6];
 
 	env_size = getenv_r ("ethaddr", s_env_mac, sizeof (s_env_mac));
 	if ((env_size > 0) && (env_size < sizeof (es))) {	/* exit if env is bad */
@@ -1547,7 +1554,7 @@ int smc_get_ethaddr (bd_t * bd)
 
 	if (!env_present) {	/* if NO env */
 		if (rom_valid) {	/* but ROM is valid */
-			v_mac = v_rom_mac;
+			v_mac = (char *)v_rom_mac;
 			sprintf (s_env_mac, "%02X:%02X:%02X:%02X:%02X:%02X",
 				 v_mac[0], v_mac[1], v_mac[2], v_mac[3],
 				 v_mac[4], v_mac[5]);
@@ -1557,7 +1564,7 @@ int smc_get_ethaddr (bd_t * bd)
 			return (-1);
 		}
 	} else {		/* good env, don't care ROM */
-		v_mac = v_env_mac;	/* always use a good env over a ROM */
+		v_mac = (char *)v_env_mac;	/* always use a good env over a ROM */
 	}
 
 	if (env_present && rom_valid) { /* if both env and ROM are good */
@@ -1577,13 +1584,13 @@ int smc_get_ethaddr (bd_t * bd)
 		}
 	}
 	memcpy (bd->bi_enetaddr, v_mac, 6);	/* update global address to match env (allows env changing) */
-	smc_set_mac_addr (v_mac);	/* use old function to update smc default */
+	smc_set_mac_addr ((uchar *)v_mac);	/* use old function to update smc default */
 	PRINTK("Using MAC Address %02X:%02X:%02X:%02X:%02X:%02X\n", v_mac[0], v_mac[1],
 		v_mac[2], v_mac[3], v_mac[4], v_mac[5]);
 	return (0);
 }
 
-int get_rom_mac (char *v_rom_mac)
+int get_rom_mac (uchar *v_rom_mac)
 {
 #ifdef HARDCODE_MAC	/* used for testing or to supress run time warnings */
 	char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 };
diff --git a/drivers/smc91111.h b/drivers/smc91111.h
index cf08582fbf..c3c33672ab 100644
--- a/drivers/smc91111.h
+++ b/drivers/smc91111.h
@@ -49,7 +49,7 @@
  * in order to override the default mac address.
  */
 
-void smc_set_mac_addr(const char *addr);
+void smc_set_mac_addr (const unsigned char *addr);
 
 
 /* I want some simple types */
diff --git a/include/asm-arm/arch-arm720t/s3c4510b.h b/include/asm-arm/arch-arm720t/s3c4510b.h
index 517b1ada99..73a3b6d856 100644
--- a/include/asm-arm/arch-arm720t/s3c4510b.h
+++ b/include/asm-arm/arch-arm720t/s3c4510b.h
@@ -267,8 +267,6 @@ struct _irq_handler {
 	void (*m_func)( void *data);
 };
 
-extern struct _irq_handler IRQ_HANDLER[];
-
 #endif
 
 #endif /* __S3C4510_h */
diff --git a/lib_arm/armlinux.c b/lib_arm/armlinux.c
index ca630b377e..dba2ff7085 100644
--- a/lib_arm/armlinux.c
+++ b/lib_arm/armlinux.c
@@ -124,7 +124,7 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		checksum = ntohl (hdr->ih_hcrc);
 		hdr->ih_hcrc = 0;
 
-		if (crc32 (0, (char *) data, len) != checksum) {
+		if (crc32 (0, (unsigned char *) data, len) != checksum) {
 			printf ("Bad Header Checksum\n");
 			SHOW_BOOT_PROGRESS (-11);
 			do_reset (cmdtp, flag, argc, argv);
@@ -148,7 +148,7 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 			ulong csum = 0;
 
 			printf ("   Verifying Checksum ... ");
-			csum = crc32 (0, (char *) data, len);
+			csum = crc32 (0, (unsigned char *) data, len);
 			if (csum != ntohl (hdr->ih_dcrc)) {
 				printf ("Bad Data CRC\n");
 				SHOW_BOOT_PROGRESS (-12);
diff --git a/lib_arm/board.c b/lib_arm/board.c
index c73cf0c38f..76639081ed 100644
--- a/lib_arm/board.c
+++ b/lib_arm/board.c
@@ -121,7 +121,7 @@ void *sbrk (ptrdiff_t increment)
 
 static int init_baudrate (void)
 {
-	uchar tmp[64];	/* long enough for environment variables */
+	char tmp[64];	/* long enough for environment variables */
 	int i = getenv_r ("baudrate", tmp, sizeof (tmp));
 	gd->bd->bi_baudrate = gd->baudrate = (i > 0)
 			? (int) simple_strtoul (tmp, NULL, 10)
@@ -235,9 +235,11 @@ init_fnc_t *init_sequence[] = {
 
 void start_armboot (void)
 {
-	ulong size;
 	init_fnc_t **init_fnc_ptr;
 	char *s;
+#ifndef CFG_NO_FLASH
+	ulong size;
+#endif
 #if defined(CONFIG_VFD) || defined(CONFIG_LCD)
 	unsigned long addr;
 #endif
@@ -320,7 +322,7 @@ void start_armboot (void)
 		int i;
 		ulong reg;
 		char *s, *e;
-		uchar tmp[64];
+		char tmp[64];
 
 		i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 		s = (i > 0) ? tmp : NULL;
diff --git a/rtc/rs5c372.c b/rtc/rs5c372.c
index 87f38c42bb..b56808b8ba 100644
--- a/rtc/rs5c372.c
+++ b/rtc/rs5c372.c
@@ -73,7 +73,7 @@ static unsigned bcd2bin (uchar c);
 static int setup_done = 0;
 
 static int
-rs5c372_readram(char *buf, int len)
+rs5c372_readram(unsigned char *buf, int len)
 {
 	int ret;
 
@@ -128,7 +128,7 @@ rs5c372_enable(void)
 }
 
 static void
-rs5c372_convert_to_time(struct rtc_time *dt, char *buf)
+rs5c372_convert_to_time(struct rtc_time *dt, unsigned char *buf)
 {
 	/* buf[0] is register 15 */
 	dt->tm_sec = bcd2bin(buf[1]);