Variable 'days' must be defined as signed int. Otherwise the conversion fails for some dates, e.g. 2004-08-25. Cf function rtc_time64_to_tm() in the Linux kernel source.
Fixes: 992c1db45591 "drivers: rtc: resolve year 2038 problem in rtc_to_tm" Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- drivers/rtc/rtc-lib.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c index b8a7a8b2d3b..6ab5d41ee0d 100644 --- a/drivers/rtc/rtc-lib.c +++ b/drivers/rtc/rtc-lib.c @@ -31,10 +31,14 @@ static int rtc_month_days(unsigned int month, unsigned int year) /* * rtc_to_tm - Converts u64 to rtc_time. * Convert seconds since 01-01-1970 00:00:00 to Gregorian date. + * + * This function is copied from rtc_time64_to_tm() in the Linux kernel. + * But in U-Boot January is month 1 and we do not subtract 1900 from the year. */ void rtc_to_tm(u64 time, struct rtc_time *tm) { - unsigned int month, year, secs, days; + unsigned int month, year, secs; + int days;
days = div_u64_rem(time, 86400, &secs);