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    SubjectRe: [PATCH 01/18] RTC Subsystem, library functions
    Date

    On Mar 18, 2006, at 11:19 AM, Alessandro Zummo wrote:

    > RTC and date/time related functions.
    >
    > Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
    > ---
    > drivers/Kconfig | 2
    > drivers/Makefile | 1
    > drivers/rtc/Kconfig | 6 ++
    > drivers/rtc/Makefile | 5 ++
    > drivers/rtc/rtc-lib.c | 101 ++++++++++++++++++++++++++++++++++++++
    > ++++++++++++
    > include/linux/rtc.h | 5 ++
    > 6 files changed, 120 insertions(+)
    >
    > --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    > +++ linux-rtc/drivers/rtc/rtc-lib.c 2006-03-13 03:26:29.000000000
    > +0100
    > @@ -0,0 +1,101 @@
    > +/*
    > + * rtc and date/time utility functions
    > + *
    > + * Copyright (C) 2005-06 Tower Technologies
    > + * Author: Alessandro Zummo <a.zummo@towertech.it>
    > + *
    > + * based on arch/arm/common/rtctime.c and other bits
    > + *
    > + * This program is free software; you can redistribute it and/or
    > modify
    > + * it under the terms of the GNU General Public License version 2 as
    > + * published by the Free Software Foundation.
    > +*/
    > +
    > +#include <linux/module.h>
    > +#include <linux/rtc.h>
    > +
    > +static const unsigned char rtc_days_in_month[] = {
    > + 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
    > +};
    > +
    > +#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
    > +#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year %
    > 400))
    > +
    > +int rtc_month_days(unsigned int month, unsigned int year)
    > +{
    > + return rtc_days_in_month[month] + (LEAP_YEAR(year) && month == 1);
    > +}
    > +EXPORT_SYMBOL(rtc_month_days);
    > +
    > +/*
    > + * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
    > + */
    > +void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
    > +{
    > + register int days, month, year;
    > +
    > + days = time / 86400;
    > + time -= days * 86400;
    > +
    > + /* day of the week, 1970-01-01 was a Thursday */
    > + tm->tm_wday = (days + 4) % 7;
    > +
    > + year = 1970 + days / 365;
    > + days -= (year - 1970) * 365
    > + + LEAPS_THRU_END_OF(year - 1)
    > + - LEAPS_THRU_END_OF(1970 - 1);
    > + if (days < 0) {
    > + year -= 1;
    > + days += 365 + LEAP_YEAR(year);
    > + }
    > + tm->tm_year = year - 1900;
    > + tm->tm_yday = days + 1;
    > +
    > + for (month = 0; month < 11; month++) {
    > + int newdays;
    > +
    > + newdays = days - rtc_month_days(month, year);
    > + if (newdays < 0)
    > + break;
    > + days = newdays;
    > + }
    > + tm->tm_mon = month;
    > + tm->tm_mday = days + 1;
    > +
    > + tm->tm_hour = time / 3600;
    > + time -= tm->tm_hour * 3600;
    > + tm->tm_min = time / 60;
    > + tm->tm_sec = time - tm->tm_min * 60;
    > +}
    > +EXPORT_SYMBOL(rtc_time_to_tm);
    > +
    > +/*
    > + * Does the rtc_time represent a valid date/time?
    > + */
    > +int rtc_valid_tm(struct rtc_time *tm)
    > +{
    > + if (tm->tm_year < 70
    > + || tm->tm_mon >= 12
    > + || tm->tm_mday < 1
    > + || tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900)
    > + || tm->tm_hour >= 24
    > + || tm->tm_min >= 60
    > + || tm->tm_sec >= 60)
    > + return -EINVAL;
    > +
    > + return 0;
    > +}
    > +EXPORT_SYMBOL(rtc_valid_tm);
    > +
    > +/*
    > + * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
    > + */
    > +int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
    > +{
    > + *time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
    > + tm->tm_hour, tm->tm_min, tm->tm_sec);
    > + return 0;
    > +}
    > +EXPORT_SYMBOL(rtc_tm_to_time);
    > +
    > +MODULE_LICENSE("GPL")

    you are missing a ';' for MODULE_LICENSE.

    [snip]

    - kumar
    -
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