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[MIPS] Switch from to_tm to rtc_time_to_tm

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This replaces the MIPS-specific to_tm function with the generic
rtc_time_to_tm function.  The big difference between the two functions is
that rtc_time_to_tm uses epoch 70 while to_tm uses 1970, so the result of
rtc_time_to_tm needs to be fixed up.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2007-10-11 23:46:09 +01:00
parent 4b550488f8
commit 90b02340dc
7 changed files with 14 additions and 63 deletions
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49
arch/mips/kernel/time.c
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@ -397,52 +397,3 @@ void __init time_init(void)
init_mips_clocksource();
}
#define FEBRUARY 2
#define STARTOFTIME 1970
#define SECDAY 86400L
#define SECYR (SECDAY * 365)
#define leapyear(y) ((!((y) % 4) && ((y) % 100)) || !((y) % 400))
#define days_in_year(y) (leapyear(y) ? 366 : 365)
#define days_in_month(m) (month_days[(m) - 1])
static int month_days[12] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
void to_tm(unsigned long tim, struct rtc_time *tm)
{
long hms, day, gday;
int i;
gday = day = tim / SECDAY;
hms = tim % SECDAY;
/* Hours, minutes, seconds are easy */
tm->tm_hour = hms / 3600;
tm->tm_min = (hms % 3600) / 60;
tm->tm_sec = (hms % 3600) % 60;
/* Number of years in days */
for (i = STARTOFTIME; day >= days_in_year(i); i++)
day -= days_in_year(i);
tm->tm_year = i;
/* Number of months in days left */
if (leapyear(tm->tm_year))
days_in_month(FEBRUARY) = 29;
for (i = 1; day >= days_in_month(i); i++)
day -= days_in_month(i);
days_in_month(FEBRUARY) = 28;
tm->tm_mon = i - 1; /* tm_mon starts from 0 to 11 */
/* Days are what is left over (+1) from all that. */
tm->tm_mday = day + 1;
/*
* Determine the day of week
*/
tm->tm_wday = (gday + 4) % 7; /* 1970/1/1 was Thursday */
}
EXPORT_SYMBOL(to_tm);