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drivers: rtc: correctly convert seconds to time structure

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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: 992c1db455 "drivers: rtc: resolve year 2038 problem in rtc_to_tm"
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2018-12-01 23:14:10 +01:00 committed by Tom Rini
parent c1d6e0bbfd
commit 952061352a
1 changed files with 5 additions and 1 deletions
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6
drivers/rtc/rtc-lib.c
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@ -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);