rtc: at91rm9200: fix reading alarm value
When alarm value is read at boot time, at91_alarm_year is not yet set to the proper value so the year is always set to 1900. This results in that kind of message at boot: rtc rtc0: invalid alarm value: 1900-1-14 2:11:39 There is no way to recover from that as the alarm is now only read when booting. Instead, rely on the rtc core to figure out the proper year. Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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@ -42,8 +42,6 @@
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#define at91_rtc_write(field, val) \
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writel_relaxed((val), at91_rtc_regs + field)
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#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
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struct at91_rtc_config {
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bool use_shadow_imr;
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};
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@ -51,7 +49,6 @@ struct at91_rtc_config {
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static const struct at91_rtc_config *at91_rtc_config;
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static DECLARE_COMPLETION(at91_rtc_updated);
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static DECLARE_COMPLETION(at91_rtc_upd_rdy);
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static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
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static void __iomem *at91_rtc_regs;
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static int irq;
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static DEFINE_SPINLOCK(at91_rtc_lock);
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@ -131,8 +128,7 @@ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg,
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/*
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* The Calendar Alarm register does not have a field for
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* the year - so these will return an invalid value. When an
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* alarm is set, at91_alarm_year will store the current year.
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* the year - so these will return an invalid value.
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*/
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tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */
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tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */
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@ -208,14 +204,14 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
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struct rtc_time *tm = &alrm->time;
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at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm);
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tm->tm_year = at91_alarm_year - 1900;
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tm->tm_year = -1;
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alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM)
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? 1 : 0;
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dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
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1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec);
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dev_dbg(dev, "%s(): %02d-%02d %02d:%02d:%02d %sabled\n", __func__,
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tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
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alrm->enabled ? "en" : "dis");
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return 0;
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}
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@ -229,8 +225,6 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
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at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm);
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at91_alarm_year = tm.tm_year;
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tm.tm_mon = alrm->time.tm_mon;
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tm.tm_mday = alrm->time.tm_mday;
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tm.tm_hour = alrm->time.tm_hour;
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@ -254,7 +248,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
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}
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dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
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at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
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tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
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tm.tm_min, tm.tm_sec);
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return 0;
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