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rtc: rx8025: round up to nearest minute for a minute accuracy alarm 

The alarm for rx8025 only has a minute accuracy, so round up to nearest
minute when setting alarm.  Without doing this, rtctest blocks one day
after setting alarm to 5 seconds later.

pcf8563 and hym8563 also have similar handling.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Akinobu Mita 2016-02-15 23:49:08 +09:00 committed by Alexandre Belloni
parent 9dbe385296
commit 302c5608e9
1 changed files with 11 additions and 1 deletions
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12
drivers/rtc/rtc-rx8025.c
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@ -344,7 +344,17 @@ static int rx8025_set_alarm(struct device *dev, struct rtc_wkalrm *t)
if (client->irq <= 0)
return -EINVAL;
/* Hardware alarm precision is 1 minute! */
/*
* Hardware alarm precision is 1 minute!
* round up to nearest minute
*/
if (t->time.tm_sec) {
time64_t alarm_time = rtc_tm_to_time64(&t->time);
alarm_time += 60 - t->time.tm_sec;
rtc_time64_to_tm(alarm_time, &t->time);
}
ald[0] = bin2bcd(t->time.tm_min);
if (rx8025->ctrl1 & RX8025_BIT_CTRL1_1224)
ald[1] = bin2bcd(t->time.tm_hour);