diff options
| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-11-10 09:59:31 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-11-10 16:24:32 +0100 |
| commit | eaa1dc7ba18db14842fbee9c57e71d28ae1c407d (patch) | |
| tree | c433d613ad7381be86260794721e85dd9d031216 | |
| parent | 275ebe2b8fcab4ba4a774e6ee1e3e28d495cff3e (diff) | |
| download | linux-eaa1dc7ba18db14842fbee9c57e71d28ae1c407d.tar.bz2 | |
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>
| -rw-r--r-- | drivers/rtc/rtc-at91rm9200.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index e84f5ec4faf6..de81ecedd571 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -42,8 +42,6 @@ #define at91_rtc_write(field, val) \ writel_relaxed((val), at91_rtc_regs + field) -#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */ - struct at91_rtc_config { bool use_shadow_imr; }; @@ -51,7 +49,6 @@ struct at91_rtc_config { static const struct at91_rtc_config *at91_rtc_config; static DECLARE_COMPLETION(at91_rtc_updated); static DECLARE_COMPLETION(at91_rtc_upd_rdy); -static unsigned int at91_alarm_year = AT91_RTC_EPOCH; static void __iomem *at91_rtc_regs; static int irq; static DEFINE_SPINLOCK(at91_rtc_lock); @@ -131,8 +128,7 @@ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, /* * The Calendar Alarm register does not have a field for - * the year - so these will return an invalid value. When an - * alarm is set, at91_alarm_year will store the current year. + * the year - so these will return an invalid value. */ tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */ tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */ @@ -208,14 +204,14 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) struct rtc_time *tm = &alrm->time; at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm); - tm->tm_year = at91_alarm_year - 1900; + tm->tm_year = -1; alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM) ? 1 : 0; - dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, - 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, - tm->tm_hour, tm->tm_min, tm->tm_sec); + dev_dbg(dev, "%s(): %02d-%02d %02d:%02d:%02d %sabled\n", __func__, + tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, + alrm->enabled ? "en" : "dis"); return 0; } @@ -229,8 +225,6 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm); - at91_alarm_year = tm.tm_year; - tm.tm_mon = alrm->time.tm_mon; tm.tm_mday = alrm->time.tm_mday; tm.tm_hour = alrm->time.tm_hour; @@ -254,7 +248,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) } dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, - at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, + tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); return 0; |