diff options
Diffstat (limited to 'drivers/rtc/rtc-lib.c')
| -rw-r--r-- | drivers/rtc/rtc-lib.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c deleted file mode 100644 index c4cf05731118..000000000000 --- a/drivers/rtc/rtc-lib.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * 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 -}; - -static const unsigned short rtc_ydays[2][13] = { - /* Normal years */ - { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, - /* Leap years */ - { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } -}; - -#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400) - -/* - * The number of days in the month. - */ -int rtc_month_days(unsigned int month, unsigned int year) -{ - return rtc_days_in_month[month] + (is_leap_year(year) && month == 1); -} -EXPORT_SYMBOL(rtc_month_days); - -/* - * The number of days since January 1. (0 to 365) - */ -int rtc_year_days(unsigned int day, unsigned int month, unsigned int year) -{ - return rtc_ydays[is_leap_year(year)][month] + day-1; -} -EXPORT_SYMBOL(rtc_year_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) -{ - unsigned int month, year; - int days; - - days = time / 86400; - time -= (unsigned int) 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 + is_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; - - tm->tm_isdst = 0; -} -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 - || ((unsigned)tm->tm_mon) >= 12 - || tm->tm_mday < 1 - || tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900) - || ((unsigned)tm->tm_hour) >= 24 - || ((unsigned)tm->tm_min) >= 60 - || ((unsigned)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); - -/* - * Convert rtc_time to ktime - */ -ktime_t rtc_tm_to_ktime(struct rtc_time tm) -{ - time_t time; - rtc_tm_to_time(&tm, &time); - return ktime_set(time, 0); -} -EXPORT_SYMBOL_GPL(rtc_tm_to_ktime); - -/* - * Convert ktime to rtc_time - */ -struct rtc_time rtc_ktime_to_tm(ktime_t kt) -{ - struct timespec ts; - struct rtc_time ret; - - ts = ktime_to_timespec(kt); - /* Round up any ns */ - if (ts.tv_nsec) - ts.tv_sec++; - rtc_time_to_tm(ts.tv_sec, &ret); - return ret; -} -EXPORT_SYMBOL_GPL(rtc_ktime_to_tm); - -MODULE_LICENSE("GPL"); |
