On Wed, 9 Mar 2022 17:22:42 +0100 Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> wrote: > The PCF2127 doesn't support UIE because setting an alarm to fire every > second confuses the chip and the fastest we can go is an alarm every 2 > seconds. Hi Alexandre, can you describe what "confuses the chip" means? In my experimental PCF2131 driver, I activated UIE and it seems to be working fine at 1s intervals, but since it is similar to PCF2127, maybe there is still a problem and I just didn't see it. Hugo. > Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> > --- > drivers/rtc/rtc-pcf2127.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c > index f8469b134411..63b275b014bd 100644 > --- a/drivers/rtc/rtc-pcf2127.c > +++ b/drivers/rtc/rtc-pcf2127.c > @@ -656,6 +656,7 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, > pcf2127->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; > pcf2127->rtc->range_max = RTC_TIMESTAMP_END_2099; > pcf2127->rtc->set_start_time = true; /* Sets actual start to 1970 */ > + set_bit(RTC_FEATURE_ALARM_RES_2S, pcf2127->rtc->features); > clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, pcf2127->rtc->features); > clear_bit(RTC_FEATURE_ALARM, pcf2127->rtc->features); > > -- > 2.35.1 > -- Hugo Villeneuve <hugo@xxxxxxxxxxx>
