diff options
Diffstat (limited to 'drivers/rtc/date.c')
| -rw-r--r-- | drivers/rtc/date.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/rtc/date.c b/drivers/rtc/date.c index 15e6db0..2000565 100644 --- a/drivers/rtc/date.c +++ b/drivers/rtc/date.c @@ -11,6 +11,7 @@ #include <common.h> #include <command.h> +#include <errno.h> #include <rtc.h> #if defined(CONFIG_CMD_DATE) || defined(CONFIG_TIMESTAMP) @@ -30,13 +31,15 @@ static int month_days[12] = { /* * This only works for the Gregorian calendar - i.e. after 1752 (in the UK) */ -void GregorianDay(struct rtc_time * tm) +int rtc_calc_weekday(struct rtc_time *tm) { int leapsToDate; int lastYear; int day; int MonthOffset[] = { 0,31,59,90,120,151,181,212,243,273,304,334 }; + if (tm->tm_year < 1753) + return -EINVAL; lastYear=tm->tm_year-1; /* @@ -64,6 +67,8 @@ void GregorianDay(struct rtc_time * tm) day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] + tm->tm_mday; tm->tm_wday=day%7; + + return 0; } void to_tm(int tim, struct rtc_time * tm) @@ -101,7 +106,7 @@ void to_tm(int tim, struct rtc_time * tm) /* * Determine the day of week */ - GregorianDay(tm); + rtc_calc_weekday(tm); } /* Converts Gregorian date to seconds since 1970-01-01 00:00:00. |