On Mon, Nov 12, 2012 at 15:17:48, AnilKumar, Chimata wrote:
> On Tue, Nov 06, 2012 at 11:15:34, Bedia, Vaibhav wrote:
> > On Mon, Nov 05, 2012 at 15:12:27, AnilKumar, Chimata wrote:
> > [...]
> > >
> > > +#define SHUTDOWN_TIME_SEC 2
> > > +#define SECS_IN_MIN 60
> > > +#define WAIT_AFTER (SECS_IN_MIN -
> > > SHUTDOWN_TIME_SEC)
> > > +#define WAIT_TIME_MS (SHUTDOWN_TIME_SEC * 1000)
> > > +
> > > static void __iomem *rtc_base;
> > >
> > [...]
> > > +
> > > + /* Wait few seconds instead of rollover */
> > > + do {
> > > + omap_rtc_read_time(NULL, &tm);
> > > + if (WAIT_AFTER <= tm.tm_sec)
> > > + mdelay(WAIT_TIME_MS);
> > > + } while (WAIT_AFTER <= tm.tm_sec);
> >
> > This hardcoded wait for rollover doesn't look good. I see some
> > helper functions in rtc-lib.c which probably could be used for
> > converting the current time to elapsed seconds, add the delay and
> > then convert it back to the time to be programmed in RTC without
> > worrying about rollover. Why not use that?
>
> I am not aware of those APIs, can you point some?
I have gone through rtc-lib.c, these are the API's I am seeing
in the library
1. rtc_time_to_tm: Convert seconds since 01-01-1970 00:00:00 to
Gregorian date
2. rtc_tm_to_time: Convert Gregorian date to seconds since
01-01-1970 00:00:00
Steps I followed:-
================
1: unsigned long time;
2: omap_rtc_read_time(NULL, &tm);
3: rtc_tm_to_time(tm, &time);
4: pr_info("Time 1 %lu\n", time);
5: time += 2; /* (2sec) */
6: rtc_time_to_tm(time, tm);
7: rtc_tm_to_time(tm, &time); /* Only for printing time value */
8: pr_info("Time 2 %lu\n", time);
With the above steps I am seeing completely two different time
values at step4 and step8
Thanks
AnilKumar
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