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drivers: rtc: mc146818: changes for y2k test

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The year needs to be corrected to an offset from 1900.

Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This commit is contained in:
Christopher Friedt 2023-06-21 04:13:15 -04:00 • committed by Chris Friedt
commit bf4977e41b
1 changed files with 3 additions and 3 deletions
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6
drivers/rtc/rtc_mc146818.c
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@ -191,8 +191,8 @@ static int rtc_mc146818_set_time(const struct device *dev, const struct rtc_time
value = rtc_read(RTC_DATA); value = rtc_read(RTC_DATA);
rtc_write(RTC_DATA, value | RTC_UCI_BIT); rtc_write(RTC_DATA, value | RTC_UCI_BIT);
year = (1970 + timeptr->tm_year) % 100; year = (1900 + timeptr->tm_year) % 100;
cent = (1970 + timeptr->tm_year) / 100; cent = (1900 + timeptr->tm_year) / 100;
if (!(rtc_read(RTC_DATA) & RTC_DMODE_BIT)) { if (!(rtc_read(RTC_DATA) & RTC_DMODE_BIT)) {
rtc_write(RTC_SEC, (uint8_t)bin2bcd(timeptr->tm_sec)); rtc_write(RTC_SEC, (uint8_t)bin2bcd(timeptr->tm_sec));
@ -271,7 +271,7 @@ static int rtc_mc146818_get_time(const struct device *dev, struct rtc_time *tim
timeptr->tm_sec = bcd2bin(timeptr->tm_sec); timeptr->tm_sec = bcd2bin(timeptr->tm_sec);
} }
timeptr->tm_year = 100 * (int)cent + year - 1970; timeptr->tm_year = 100 * (int)cent + year - 1900;
timeptr->tm_nsec = 0; timeptr->tm_nsec = 0;
timeptr->tm_yday = 0; timeptr->tm_yday = 0;