diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
index e0d3c8b..e2df4a1 100644
--- a/arch/m68k/atari/time.c
+++ b/arch/m68k/atari/time.c
@@ -191,13 +191,14 @@
         }
 
         if (!(ctrl & RTC_DM_BINARY)) {
-            BIN_TO_BCD(sec);
-            BIN_TO_BCD(min);
-            BIN_TO_BCD(hour);
-            BIN_TO_BCD(day);
-            BIN_TO_BCD(mon);
-            BIN_TO_BCD(year);
-            if (wday >= 0) BIN_TO_BCD(wday);
+	    sec = bin2bcd(sec);
+	    min = bin2bcd(min);
+	    hour = bin2bcd(hour);
+	    day = bin2bcd(day);
+	    mon = bin2bcd(mon);
+	    year = bin2bcd(year);
+	    if (wday >= 0)
+		wday = bin2bcd(wday);
         }
     }
 
@@ -252,13 +253,13 @@
 	}
 
 	if (!(ctrl & RTC_DM_BINARY)) {
-            BCD_TO_BIN(sec);
-            BCD_TO_BIN(min);
-            BCD_TO_BIN(hour);
-            BCD_TO_BIN(day);
-            BCD_TO_BIN(mon);
-            BCD_TO_BIN(year);
-            BCD_TO_BIN(wday);
+	    sec = bcd2bin(sec);
+	    min = bcd2bin(min);
+	    hour = bcd2bin(hour);
+	    day = bcd2bin(day);
+	    mon = bcd2bin(mon);
+	    year = bcd2bin(year);
+	    wday = bcd2bin(wday);
         }
 
         if (!(ctrl & RTC_24H)) {
@@ -318,7 +319,7 @@
 
     rtc_minutes = RTC_READ (RTC_MINUTES);
     if (!(save_control & RTC_DM_BINARY))
-        BCD_TO_BIN (rtc_minutes);
+	rtc_minutes = bcd2bin(rtc_minutes);
 
     /* Since we're only adjusting minutes and seconds, don't interfere
        with hour overflow.  This avoids messing with unknown time zones
@@ -329,8 +330,8 @@
         {
             if (!(save_control & RTC_DM_BINARY))
                 {
-                    BIN_TO_BCD (real_seconds);
-                    BIN_TO_BCD (real_minutes);
+		    real_seconds = bin2bcd(real_seconds);
+		    real_minutes = bin2bcd(real_minutes);
                 }
             RTC_WRITE (RTC_SECONDS, real_seconds);
             RTC_WRITE (RTC_MINUTES, real_minutes);
diff --git a/arch/m68k/bvme6000/config.c b/arch/m68k/bvme6000/config.c
index 9433a88..65c9204 100644
--- a/arch/m68k/bvme6000/config.c
+++ b/arch/m68k/bvme6000/config.c
@@ -25,6 +25,7 @@
 #include <linux/genhd.h>
 #include <linux/rtc.h>
 #include <linux/interrupt.h>
+#include <linux/bcd.h>
 
 #include <asm/bootinfo.h>
 #include <asm/system.h>
@@ -46,9 +47,6 @@
 extern void bvme6000_waitbut(void);
 void bvme6000_set_vectors (void);
 
-static unsigned char bcd2bin (unsigned char b);
-static unsigned char bin2bcd (unsigned char b);
-
 /* Save tick handler routine pointer, will point to do_timer() in
  * kernel/sched.c, called via bvme6000_process_int() */
 
@@ -264,17 +262,6 @@
     return v;
 }
 
-static unsigned char bcd2bin (unsigned char b)
-{
-	return ((b>>4)*10 + (b&15));
-}
-
-static unsigned char bin2bcd (unsigned char b)
-{
-	return (((b/10)*16) + (b%10));
-}
-
-
 /*
  * Looks like op is non-zero for setting the clock, and zero for
  * reading the clock.
diff --git a/arch/m68k/bvme6000/rtc.c b/arch/m68k/bvme6000/rtc.c
index e8ac3f7..808c901 100644
--- a/arch/m68k/bvme6000/rtc.c
+++ b/arch/m68k/bvme6000/rtc.c
@@ -57,16 +57,16 @@
 		rtc->msr = 0x40;
 		memset(&wtime, 0, sizeof(struct rtc_time));
 		do {
-			wtime.tm_sec =  BCD2BIN(rtc->bcd_sec);
-			wtime.tm_min =  BCD2BIN(rtc->bcd_min);
-			wtime.tm_hour = BCD2BIN(rtc->bcd_hr);
-			wtime.tm_mday =  BCD2BIN(rtc->bcd_dom);
-			wtime.tm_mon =  BCD2BIN(rtc->bcd_mth)-1;
-			wtime.tm_year = BCD2BIN(rtc->bcd_year);
+			wtime.tm_sec =  bcd2bin(rtc->bcd_sec);
+			wtime.tm_min =  bcd2bin(rtc->bcd_min);
+			wtime.tm_hour = bcd2bin(rtc->bcd_hr);
+			wtime.tm_mday =  bcd2bin(rtc->bcd_dom);
+			wtime.tm_mon =  bcd2bin(rtc->bcd_mth)-1;
+			wtime.tm_year = bcd2bin(rtc->bcd_year);
 			if (wtime.tm_year < 70)
 				wtime.tm_year += 100;
-			wtime.tm_wday = BCD2BIN(rtc->bcd_dow)-1;
-		} while (wtime.tm_sec != BCD2BIN(rtc->bcd_sec));
+			wtime.tm_wday = bcd2bin(rtc->bcd_dow)-1;
+		} while (wtime.tm_sec != bcd2bin(rtc->bcd_sec));
 		rtc->msr = msr;
 		local_irq_restore(flags);
 		return copy_to_user(argp, &wtime, sizeof wtime) ?
@@ -114,14 +114,14 @@
 
 		rtc->t0cr_rtmr = yrs%4;
 		rtc->bcd_tenms = 0;
-		rtc->bcd_sec   = BIN2BCD(sec);
-		rtc->bcd_min   = BIN2BCD(min);
-		rtc->bcd_hr    = BIN2BCD(hrs);
-		rtc->bcd_dom   = BIN2BCD(day);
-		rtc->bcd_mth   = BIN2BCD(mon);
-		rtc->bcd_year  = BIN2BCD(yrs%100);
+		rtc->bcd_sec   = bin2bcd(sec);
+		rtc->bcd_min   = bin2bcd(min);
+		rtc->bcd_hr    = bin2bcd(hrs);
+		rtc->bcd_dom   = bin2bcd(day);
+		rtc->bcd_mth   = bin2bcd(mon);
+		rtc->bcd_year  = bin2bcd(yrs%100);
 		if (rtc_tm.tm_wday >= 0)
-			rtc->bcd_dow = BIN2BCD(rtc_tm.tm_wday+1);
+			rtc->bcd_dow = bin2bcd(rtc_tm.tm_wday+1);
 		rtc->t0cr_rtmr = yrs%4 | 0x08;
 
 		rtc->msr = msr;
diff --git a/arch/m68k/mvme16x/rtc.c b/arch/m68k/mvme16x/rtc.c
index 432a9f1..cea5e3e 100644
--- a/arch/m68k/mvme16x/rtc.c
+++ b/arch/m68k/mvme16x/rtc.c
@@ -52,15 +52,15 @@
 		/* Ensure clock and real-time-mode-register are accessible */
 		rtc->ctrl = RTC_READ;
 		memset(&wtime, 0, sizeof(struct rtc_time));
-		wtime.tm_sec =  BCD2BIN(rtc->bcd_sec);
-		wtime.tm_min =  BCD2BIN(rtc->bcd_min);
-		wtime.tm_hour = BCD2BIN(rtc->bcd_hr);
-		wtime.tm_mday =  BCD2BIN(rtc->bcd_dom);
-		wtime.tm_mon =  BCD2BIN(rtc->bcd_mth)-1;
-		wtime.tm_year = BCD2BIN(rtc->bcd_year);
+		wtime.tm_sec =  bcd2bin(rtc->bcd_sec);
+		wtime.tm_min =  bcd2bin(rtc->bcd_min);
+		wtime.tm_hour = bcd2bin(rtc->bcd_hr);
+		wtime.tm_mday =  bcd2bin(rtc->bcd_dom);
+		wtime.tm_mon =  bcd2bin(rtc->bcd_mth)-1;
+		wtime.tm_year = bcd2bin(rtc->bcd_year);
 		if (wtime.tm_year < 70)
 			wtime.tm_year += 100;
-		wtime.tm_wday = BCD2BIN(rtc->bcd_dow)-1;
+		wtime.tm_wday = bcd2bin(rtc->bcd_dow)-1;
 		rtc->ctrl = 0;
 		local_irq_restore(flags);
 		return copy_to_user(argp, &wtime, sizeof wtime) ?
@@ -104,12 +104,12 @@
 		local_irq_save(flags);
 		rtc->ctrl     = RTC_WRITE;
 
-		rtc->bcd_sec  = BIN2BCD(sec);
-		rtc->bcd_min  = BIN2BCD(min);
-		rtc->bcd_hr   = BIN2BCD(hrs);
-		rtc->bcd_dom  = BIN2BCD(day);
-		rtc->bcd_mth  = BIN2BCD(mon);
-		rtc->bcd_year = BIN2BCD(yrs%100);
+		rtc->bcd_sec  = bin2bcd(sec);
+		rtc->bcd_min  = bin2bcd(min);
+		rtc->bcd_hr   = bin2bcd(hrs);
+		rtc->bcd_dom  = bin2bcd(day);
+		rtc->bcd_mth  = bin2bcd(mon);
+		rtc->bcd_year = bin2bcd(yrs%100);
 
 		rtc->ctrl     = 0;
 		local_irq_restore(flags);
diff --git a/arch/m68k/q40/config.c b/arch/m68k/q40/config.c
index be9de2f..9c7eefa 100644
--- a/arch/m68k/q40/config.c
+++ b/arch/m68k/q40/config.c
@@ -23,6 +23,7 @@
 #include <linux/serial_reg.h>
 #include <linux/rtc.h>
 #include <linux/vt_kern.h>
+#include <linux/bcd.h>
 
 #include <asm/io.h>
 #include <asm/rtc.h>
@@ -216,17 +217,6 @@
 }
 
 
-static inline unsigned char bcd2bin(unsigned char b)
-{
-	return (b >> 4) * 10 + (b & 15);
-}
-
-static inline unsigned char bin2bcd(unsigned char b)
-{
-	return (b / 10) * 16 + (b % 10);
-}
-
-
 static unsigned long q40_gettimeoffset(void)
 {
 	return 5000 * (ql_ticks != 0);
diff --git a/arch/m68k/sun3x/time.c b/arch/m68k/sun3x/time.c
index f5eaafb..536a04a 100644
--- a/arch/m68k/sun3x/time.c
+++ b/arch/m68k/sun3x/time.c
@@ -47,23 +47,23 @@
 
 	if(set) {
 		h->csr |= C_WRITE;
-		h->sec = BIN2BCD(t->tm_sec);
-		h->min = BIN2BCD(t->tm_min);
-		h->hour = BIN2BCD(t->tm_hour);
-		h->wday = BIN2BCD(t->tm_wday);
-		h->mday = BIN2BCD(t->tm_mday);
-		h->month = BIN2BCD(t->tm_mon);
-		h->year = BIN2BCD(t->tm_year);
+		h->sec = bin2bcd(t->tm_sec);
+		h->min = bin2bcd(t->tm_min);
+		h->hour = bin2bcd(t->tm_hour);
+		h->wday = bin2bcd(t->tm_wday);
+		h->mday = bin2bcd(t->tm_mday);
+		h->month = bin2bcd(t->tm_mon);
+		h->year = bin2bcd(t->tm_year);
 		h->csr &= ~C_WRITE;
 	} else {
 		h->csr |= C_READ;
-		t->tm_sec = BCD2BIN(h->sec);
-		t->tm_min = BCD2BIN(h->min);
-		t->tm_hour = BCD2BIN(h->hour);
-		t->tm_wday = BCD2BIN(h->wday);
-		t->tm_mday = BCD2BIN(h->mday);
-		t->tm_mon = BCD2BIN(h->month);
-		t->tm_year = BCD2BIN(h->year);
+		t->tm_sec = bcd2bin(h->sec);
+		t->tm_min = bcd2bin(h->min);
+		t->tm_hour = bcd2bin(h->hour);
+		t->tm_wday = bcd2bin(h->wday);
+		t->tm_mday = bcd2bin(h->mday);
+		t->tm_mon = bcd2bin(h->month);
+		t->tm_year = bcd2bin(h->year);
 		h->csr &= ~C_READ;
 	}