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Subject[PATCH][RESEND] Cleanup (BIN|BCD)_TO_(BCD|BIN) usage/macros
Right now there's a bit of a mess with all of the BIN_TO_BCD/BCD_TO_BIN
macros in the kernel. It's defined in a half dozen places, and worse
yet, not all places use them the same way. Most users do something
like:
if ( ... )
BIN_TO_BCD(x);

But in a few places, it's used as:
if ( ... )
y = BIN_TO_BCD(x);

The following creates include/linux/bcd.h which has the 'normal'
BIN_TO_BCD macros, as well as CONVERT_{BIN,BCD}_TO_{BCD,BIN},
which are for the second case. This patch removes all other defines,
adds <linux/bcd.h> to <linux/mc146818rtc.h> for compatibility, and adds
<linux/bcd.h> directly to anything which was implicitly including
<linux/mc146818rtc.h> before.

This was originally sent back on August 12th, without any comment.

--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/

===== arch/arm/kernel/time.c 1.8 vs edited =====
--- 1.8/arch/arm/kernel/time.c Sat Aug 3 06:39:48 2002
+++ edited/arch/arm/kernel/time.c Tue Sep 17 11:01:55 2002
@@ -47,14 +47,6 @@
/* change this if you have some constant time drift */
#define USECS_PER_JIFFY (1000000/HZ)

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
static int dummy_set_rtc(void)
{
return 0;
===== arch/cris/drivers/ds1302.c 1.3 vs edited =====
--- 1.3/arch/cris/drivers/ds1302.c Tue Feb 5 08:24:37 2002
+++ edited/arch/cris/drivers/ds1302.c Tue Sep 17 11:01:55 2002
@@ -97,6 +97,7 @@
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
+#include <linux/bcd.h>

#include <asm/uaccess.h>
#include <asm/system.h>
===== arch/cris/kernel/time.c 1.6 vs edited =====
--- 1.6/arch/cris/kernel/time.c Sun Jun 16 17:39:47 2002
+++ edited/arch/cris/kernel/time.c Tue Sep 17 11:01:55 2002
@@ -32,6 +32,7 @@
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
+#include <linux/bcd.h>

#include <asm/segment.h>
#include <asm/io.h>
===== arch/m68k/sun3x/time.c 1.3 vs edited =====
--- 1.3/arch/m68k/sun3x/time.c Sun Feb 24 05:50:59 2002
+++ edited/arch/m68k/sun3x/time.c Tue Sep 17 11:01:55 2002
@@ -11,6 +11,7 @@
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <linux/rtc.h>
+#include <linux/bcd.h>

#include <asm/irq.h>
#include <asm/io.h>
@@ -36,9 +37,6 @@
#define C_SIGN 0x20
#define C_CALIB 0x1f

-#define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10)
-#define BIN_TO_BCD(val) (((val/10) << 4) | (val % 10))
-
int sun3x_hwclk(int set, struct rtc_time *t)
{
volatile struct mostek_dt *h =
@@ -49,23 +47,23 @@

if(set) {
h->csr |= C_WRITE;
- h->sec = BIN_TO_BCD(t->tm_sec);
- h->min = BIN_TO_BCD(t->tm_min);
- h->hour = BIN_TO_BCD(t->tm_hour);
- h->wday = BIN_TO_BCD(t->tm_wday);
- h->mday = BIN_TO_BCD(t->tm_mday);
- h->month = BIN_TO_BCD(t->tm_mon);
- h->year = BIN_TO_BCD(t->tm_year);
+ h->sec = CONVERT_BIN_TO_BCD(t->tm_sec);
+ h->min = CONVERT_BIN_TO_BCD(t->tm_min);
+ h->hour = CONVERT_BIN_TO_BCD(t->tm_hour);
+ h->wday = CONVERT_BIN_TO_BCD(t->tm_wday);
+ h->mday = CONVERT_BIN_TO_BCD(t->tm_mday);
+ h->month = CONVERT_BIN_TO_BCD(t->tm_mon);
+ h->year = CONVERT_BIN_TO_BCD(t->tm_year);
h->csr &= ~C_WRITE;
} else {
h->csr |= C_READ;
- t->tm_sec = BCD_TO_BIN(h->sec);
- t->tm_min = BCD_TO_BIN(h->min);
- t->tm_hour = BCD_TO_BIN(h->hour);
- t->tm_wday = BCD_TO_BIN(h->wday);
- t->tm_mday = BCD_TO_BIN(h->mday);
- t->tm_mon = BCD_TO_BIN(h->month);
- t->tm_year = BCD_TO_BIN(h->year);
+ t->tm_sec = CONVERT_BCD_TO_BIN(h->sec);
+ t->tm_min = CONVERT_BCD_TO_BIN(h->min);
+ t->tm_hour = CONVERT_BCD_TO_BIN(h->hour);
+ t->tm_wday = CONVERT_BCD_TO_BIN(h->wday);
+ t->tm_mday = CONVERT_BCD_TO_BIN(h->mday);
+ t->tm_mon = CONVERT_BCD_TO_BIN(h->month);
+ t->tm_year = CONVERT_BCD_TO_BIN(h->year);
h->csr &= ~C_READ;
}

===== arch/mips/ddb5xxx/common/rtc_ds1386.c 1.1 vs edited =====
--- 1.1/arch/mips/ddb5xxx/common/rtc_ds1386.c Tue Feb 5 13:17:17 2002
+++ edited/arch/mips/ddb5xxx/common/rtc_ds1386.c Tue Sep 17 11:01:55 2002
@@ -20,6 +20,7 @@

#include <linux/types.h>
#include <linux/time.h>
+#include <linux/bcd.h>

#include <asm/time.h>
#include <asm/addrspace.h>
@@ -28,12 +29,6 @@

#define EPOCH 2000

-#undef BCD_TO_BIN
-#define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10)
-
-#undef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((((val)/10)<<4) + (val)%10)
-
#define READ_RTC(x) *(volatile unsigned char*)(rtc_base+x)
#define WRITE_RTC(x, y) *(volatile unsigned char*)(rtc_base+x) = y

@@ -52,11 +47,11 @@
WRITE_RTC(0xB, byte);

/* read time data */
- year = BCD_TO_BIN(READ_RTC(0xA)) + EPOCH;
- month = BCD_TO_BIN(READ_RTC(0x9) & 0x1f);
- day = BCD_TO_BIN(READ_RTC(0x8));
- minute = BCD_TO_BIN(READ_RTC(0x2));
- second = BCD_TO_BIN(READ_RTC(0x1));
+ year = CONVERT_BCD_TO_BIN(READ_RTC(0xA)) + EPOCH;
+ month = CONVERT_BCD_TO_BIN(READ_RTC(0x9) & 0x1f);
+ day = CONVERT_BCD_TO_BIN(READ_RTC(0x8));
+ minute = CONVERT_BCD_TO_BIN(READ_RTC(0x2));
+ second = CONVERT_BCD_TO_BIN(READ_RTC(0x1));

/* hour is special - deal with it later */
temp = READ_RTC(0x4);
@@ -68,11 +63,11 @@
/* calc hour */
if (temp & 0x40) {
/* 12 hour format */
- hour = BCD_TO_BIN(temp & 0x1f);
+ hour = CONVERT_BCD_TO_BIN(temp & 0x1f);
if (temp & 0x20) hour += 12; /* PM */
} else {
/* 24 hour format */
- hour = BCD_TO_BIN(temp & 0x3f);
+ hour = CONVERT_BCD_TO_BIN(temp & 0x3f);
}

return mktime(year, month, day, hour, minute, second);
@@ -95,19 +90,19 @@
to_tm(t, &tm);

/* check each field one by one */
- year = BIN_TO_BCD(tm.tm_year - EPOCH);
+ year = CONVERT_BIN_TO_BCD(tm.tm_year - EPOCH);
if (year != READ_RTC(0xA)) {
WRITE_RTC(0xA, year);
}

temp = READ_RTC(0x9);
- month = BIN_TO_BCD(tm.tm_mon);
+ month = CONVERT_BIN_TO_BCD(tm.tm_mon);
if (month != (temp & 0x1f)) {
WRITE_RTC( 0x9,
(month & 0x1f) | (temp & ~0x1f) );
}

- day = BIN_TO_BCD(tm.tm_mday);
+ day = CONVERT_BIN_TO_BCD(tm.tm_mday);
if (day != READ_RTC(0x8)) {
WRITE_RTC(0x8, day);
}
@@ -117,22 +112,22 @@
/* 12 hour format */
hour = 0x40;
if (tm.tm_hour > 12) {
- hour |= 0x20 | (BIN_TO_BCD(hour-12) & 0x1f);
+ hour |= 0x20 | (CONVERT_BIN_TO_BCD(hour-12) & 0x1f);
} else {
- hour |= BIN_TO_BCD(tm.tm_hour);
+ hour |= CONVERT_BIN_TO_BCD(tm.tm_hour);
}
} else {
/* 24 hour format */
- hour = BIN_TO_BCD(tm.tm_hour) & 0x3f;
+ hour = CONVERT_BIN_TO_BCD(tm.tm_hour) & 0x3f;
}
if (hour != temp) WRITE_RTC(0x4, hour);

- minute = BIN_TO_BCD(tm.tm_min);
+ minute = CONVERT_BIN_TO_BCD(tm.tm_min);
if (minute != READ_RTC(0x2)) {
WRITE_RTC(0x2, minute);
}

- second = BIN_TO_BCD(tm.tm_sec);
+ second = CONVERT_BIN_TO_BCD(tm.tm_sec);
if (second != READ_RTC(0x1)) {
WRITE_RTC(0x1, second);
}
===== arch/mips64/sgi-ip27/ip27-rtc.c 1.4 vs edited =====
--- 1.4/arch/mips64/sgi-ip27/ip27-rtc.c Thu May 23 09:06:16 2002
+++ edited/arch/mips64/sgi-ip27/ip27-rtc.c Tue Sep 17 11:01:55 2002
@@ -35,6 +35,7 @@
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/smp_lock.h>
+#include <linux/bcd.h>

#include <asm/m48t35.h>
#include <asm/sn/ioc3.h>
===== arch/mips64/sgi-ip27/ip27-timer.c 1.2 vs edited =====
--- 1.2/arch/mips64/sgi-ip27/ip27-timer.c Tue Feb 5 00:45:04 2002
+++ edited/arch/mips64/sgi-ip27/ip27-timer.c Tue Sep 17 11:01:55 2002
@@ -11,6 +11,7 @@
#include <linux/param.h>
#include <linux/timex.h>
#include <linux/mm.h>
+#include <linux/bcd.h>

#include <asm/pgtable.h>
#include <asm/sgialib.h>
===== arch/ppc/iSeries/mf.c 1.2 vs edited =====
--- 1.2/arch/ppc/iSeries/mf.c Sun Jun 2 23:49:59 2002
+++ edited/arch/ppc/iSeries/mf.c Tue Sep 17 11:01:55 2002
@@ -40,6 +40,7 @@
#include <asm/iSeries/iSeries_proc.h>
#include <asm/uaccess.h>
#include <linux/pci.h>
+#include <linux/bcd.h>


/*
===== arch/ppc/kernel/todc_time.c 1.1 vs edited =====
--- 1.1/arch/ppc/kernel/todc_time.c Sun Feb 10 04:20:03 2002
+++ edited/arch/ppc/kernel/todc_time.c Tue Sep 17 11:01:55 2002
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/time.h>
#include <linux/timex.h>
+#include <linux/bcd.h>

#include <asm/machdep.h>
#include <asm/io.h>
===== arch/ppc/platforms/gemini_setup.c 1.11 vs edited =====
--- 1.11/arch/ppc/platforms/gemini_setup.c Mon May 27 08:05:50 2002
+++ edited/arch/ppc/platforms/gemini_setup.c Tue Sep 17 11:01:55 2002
@@ -27,6 +27,7 @@
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
+#include <linux/bcd.h>

#include <asm/system.h>
#include <asm/pgtable.h>
===== arch/ppc/platforms/prep_time.c 1.6 vs edited =====
--- 1.6/arch/ppc/platforms/prep_time.c Sun Feb 10 04:41:25 2002
+++ edited/arch/ppc/platforms/prep_time.c Tue Sep 17 11:01:55 2002
@@ -22,6 +22,7 @@
#include <linux/timex.h>
#include <linux/kernel_stat.h>
#include <linux/init.h>
+#include <linux/bcd.h>

#include <asm/sections.h>
#include <asm/segment.h>
===== arch/ppc64/kernel/mf.c 1.2 vs edited =====
--- 1.2/arch/ppc64/kernel/mf.c Wed Apr 24 21:46:36 2002
+++ edited/arch/ppc64/kernel/mf.c Tue Sep 17 11:01:55 2002
@@ -40,6 +40,7 @@
#include <asm/iSeries/iSeries_proc.h>
#include <asm/uaccess.h>
#include <linux/pci.h>
+#include <linux/bcd.h>

extern struct pci_dev * iSeries_vio_dev;

===== arch/sh/kernel/rtc.c 1.5 vs edited =====
--- 1.5/arch/sh/kernel/rtc.c Tue Feb 5 08:24:41 2002
+++ edited/arch/sh/kernel/rtc.c Tue Sep 17 11:01:55 2002
@@ -9,17 +9,10 @@
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/time.h>
+#include <linux/bcd.h>

#include <asm/io.h>
#include <asm/rtc.h>
-
-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif

void sh_rtc_gettimeofday(struct timeval *tv)
{
===== arch/sparc64/kernel/time.c 1.14 vs edited =====
--- 1.14/arch/sparc64/kernel/time.c Fri Sep 13 14:41:56 2002
+++ edited/arch/sparc64/kernel/time.c Tue Sep 17 11:01:56 2002
@@ -316,14 +316,6 @@
return (data1 == data2); /* Was the write blocked? */
}

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((((val)/10)<<4) + (val)%10)
-#endif
-
/* Probe for the real time clock chip. */
static void __init set_system_time(void)
{
===== drivers/scsi/sr_vendor.c 1.8 vs edited =====
--- 1.8/drivers/scsi/sr_vendor.c Wed Sep 4 14:24:17 2002
+++ edited/drivers/scsi/sr_vendor.c Tue Sep 17 11:01:57 2002
@@ -37,6 +37,7 @@
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/string.h>
+#include <linux/bcd.h>

#include <linux/blk.h>
#include "scsi.h"
@@ -147,8 +148,6 @@
/* This function gets called after a media change. Checks if the CD is
multisession, asks for offset etc. */

-#define BCD_TO_BIN(x) ((((int)x & 0xf0) >> 4)*10 + ((int)x & 0x0f))
-
int sr_cd_check(struct cdrom_device_info *cdi)
{
Scsi_CD *cd = cdi->handle;
@@ -213,9 +212,9 @@
no_multi = 1;
break;
}
- min = BCD_TO_BIN(buffer[15]);
- sec = BCD_TO_BIN(buffer[16]);
- frame = BCD_TO_BIN(buffer[17]);
+ min = CONVERT_BCD_TO_BIN(buffer[15]);
+ sec = CONVERT_BCD_TO_BIN(buffer[16]);
+ frame = CONVERT_BCD_TO_BIN(buffer[17]);
sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
break;
}
@@ -240,9 +239,9 @@
}
if (rc != 0)
break;
- min = BCD_TO_BIN(buffer[1]);
- sec = BCD_TO_BIN(buffer[2]);
- frame = BCD_TO_BIN(buffer[3]);
+ min = CONVERT_BCD_TO_BIN(buffer[1]);
+ sec = CONVERT_BCD_TO_BIN(buffer[2]);
+ frame = CONVERT_BCD_TO_BIN(buffer[3]);
sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
if (sector)
sector -= CD_MSF_OFFSET;
===== drivers/sgi/char/ds1286.c 1.4 vs edited =====
--- 1.4/drivers/sgi/char/ds1286.c Tue Feb 5 00:44:52 2002
+++ edited/drivers/sgi/char/ds1286.c Tue Sep 17 11:01:57 2002
@@ -36,6 +36,7 @@
#include <linux/poll.h>
#include <linux/rtc.h>
#include <linux/spinlock.h>
+#include <linux/bcd.h>

#include <asm/ds1286.h>
#include <asm/io.h>
===== include/asm-cris/rtc.h 1.2 vs edited =====
--- 1.2/include/asm-cris/rtc.h Tue Feb 5 00:40:14 2002
+++ edited/include/asm-cris/rtc.h Tue Sep 17 11:01:57 2002
@@ -39,11 +39,6 @@
#define RTC_INIT() (-1)
#endif

-/* conversions to and from the stupid RTC internal format */
-
-#define BCD_TO_BIN(x) x = (((x & 0xf0) >> 3) * 5 + (x & 0xf))
-#define BIN_TO_BCD(x) x = (x % 10) | ((x / 10) << 4)
-
/*
* The struct used to pass data via the following ioctl. Similar to the
* struct tm in <time.h>, but it needs to be here so that the kernel
===== include/asm-mips/ds1286.h 1.1 vs edited =====
--- 1.1/include/asm-mips/ds1286.h Tue Feb 5 10:39:45 2002
+++ edited/include/asm-mips/ds1286.h Tue Sep 17 11:01:57 2002
@@ -57,15 +57,4 @@
#define RTC_IPSW 0x40
#define RTC_TE 0x80

-/*
- * Conversion between binary and BCD.
- */
-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
#endif /* _ASM_DS1286_h */
===== include/asm-mips64/ds1286.h 1.2 vs edited =====
--- 1.2/include/asm-mips64/ds1286.h Tue Feb 5 00:45:05 2002
+++ edited/include/asm-mips64/ds1286.h Tue Sep 17 11:01:57 2002
@@ -56,15 +56,4 @@
#define RTC_IPSW 0x40
#define RTC_TE 0x80

-/*
- * Conversion between binary and BCD.
- */
-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
#endif /* _ASM_DS1286_h */
===== include/asm-mips64/m48t35.h 1.1 vs edited =====
--- 1.1/include/asm-mips64/m48t35.h Tue Feb 5 10:39:55 2002
+++ edited/include/asm-mips64/m48t35.h Tue Sep 17 11:01:57 2002
@@ -21,12 +21,4 @@
#define M48T35_RTC_STOPPED 0x80
#define M48T35_RTC_READ 0x40

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(x) ((x)=((x)&15) + ((x)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(x) ((x)=(((x)/10)<<4) + (x)%10)
-#endif
-
#endif
===== include/asm-ppc/m48t35.h 1.3 vs edited =====
--- 1.3/include/asm-ppc/m48t35.h Tue Feb 5 00:54:05 2002
+++ edited/include/asm-ppc/m48t35.h Tue Sep 17 11:01:57 2002
@@ -76,14 +76,4 @@
#define M48T35_RTC_STOPPED 0x80
#define M48T35_RTC_READ 0x40

-
-/* read/write conversions */
-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(x) ((x)=((x)&15) + ((x)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(x) ((x)=(((x)/10)<<4) + (x)%10)
-#endif
-
#endif
===== include/asm-ppc/mk48t59.h 1.2 vs edited =====
--- 1.2/include/asm-ppc/mk48t59.h Tue Feb 5 00:40:23 2002
+++ edited/include/asm-ppc/mk48t59.h Tue Sep 17 11:01:57 2002
@@ -27,12 +27,4 @@
#define MK48T59_RTC_CONTROLB 0x1FF9
#define MK48T59_RTC_CB_STOP 0x80

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
#endif /* _PPC_MK48T59_H */
===== include/asm-ppc/nvram.h 1.2 vs edited =====
--- 1.2/include/asm-ppc/nvram.h Tue Feb 5 00:40:23 2002
+++ edited/include/asm-ppc/nvram.h Tue Sep 17 11:01:57 2002
@@ -26,14 +26,6 @@
#define MOTO_RTC_CONTROLA 0x1FF8
#define MOTO_RTC_CONTROLB 0x1FF9

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
/* PowerMac specific nvram stuffs */

enum {
===== include/asm-ppc/todc.h 1.1 vs edited =====
--- 1.1/include/asm-ppc/todc.h Sun Feb 10 03:45:43 2002
+++ edited/include/asm-ppc/todc.h Tue Sep 17 11:01:57 2002
@@ -355,14 +355,6 @@
todc_info->flags = clock_type ##_FLAGS; \
}

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
extern todc_info_t *todc_info;

unsigned char todc_direct_read_val(int addr);
===== include/asm-ppc64/nvram.h 1.2 vs edited =====
--- 1.2/include/asm-ppc64/nvram.h Fri Mar 15 19:14:30 2002
+++ edited/include/asm-ppc64/nvram.h Tue Sep 17 11:01:57 2002
@@ -28,12 +28,4 @@
#define MOTO_RTC_CONTROLA 0x1FF8
#define MOTO_RTC_CONTROLB 0x1FF9

-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif
-
#endif /* _PPC64_NVRAM_H */
===== include/linux/mc146818rtc.h 1.2 vs edited =====
--- 1.2/include/linux/mc146818rtc.h Tue Feb 5 00:45:03 2002
+++ edited/include/linux/mc146818rtc.h Tue Sep 17 11:01:57 2002
@@ -14,6 +14,7 @@
#include <asm/io.h>
#include <linux/rtc.h> /* get the user-level API */
#include <linux/spinlock.h> /* spinlock_t */
+#include <linux/bcd.h> /* (BIN|BCD)_TO_(BCD|BIN) */
#include <asm/mc146818rtc.h> /* register access macros */

extern spinlock_t rtc_lock; /* serialize CMOS RAM access */
@@ -86,16 +87,5 @@
#define RTC_VALID RTC_REG_D
# define RTC_VRT 0x80 /* valid RAM and time */
/**********************************************************************/
-
-/* example: !(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY)
- * determines if the following two #defines are needed
- */
-#ifndef BCD_TO_BIN
-#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
-#endif
-
-#ifndef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
-#endif

#endif /* _MC146818RTC_H */
--- /dev/null 1969-12-31 17:00:00.000000000 -0700
+++ include/linux/bcd.h 2002-09-17 11:01:57.000000000 -0700
@@ -0,0 +1,28 @@
+/*
+ * include/linux/bcd.h: Macros to convert to/from Binary Coded Decimals.
+ *
+ * Originally in numerous files throughout the kernel.
+ *
+ * Author: Tom Rini
+ * trini@mvista.com
+ * Copyright 2002 MontaVista Software Inc.
+ *
+ * Please read the COPYING file for all license details.
+ */
+
+#ifndef __LINUX_BCD_H__
+#define __LINUX_BCD_H__
+
+/*
+ * Just convert the value, and don't change the original.
+ */
+#define CONVERT_BIN_TO_BCD(val) ((((val) / 10) << 4) + (val) % 10)
+#define CONVERT_BCD_TO_BIN(val) (((val) & 15) + ((val) >> 4) * 10)
+
+/*
+ * Change the variable 'val' from one to the other.
+ */
+#define BIN_TO_BCD(val) ((val) = CONVERT_BIN_TO_BCD((val)))
+#define BCD_TO_BIN(val) ((val) = CONVERT_BCD_TO_BIN((val)))
+
+#endif /* __LINUX_BCD_H__ */
-
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