diff options
Diffstat (limited to 'drivers/rtc/date.c')
-rw-r--r-- | drivers/rtc/date.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/drivers/rtc/date.c b/drivers/rtc/date.c deleted file mode 100644 index c57317d2c2..0000000000 --- a/drivers/rtc/date.c +++ /dev/null @@ -1,100 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * (C) Copyright 2001 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - */ - -#include <common.h> -#include <command.h> -#include <errno.h> -#include <rtc.h> - -#if defined(CONFIG_CMD_DATE) || defined(CONFIG_DM_RTC) || \ - defined(CONFIG_TIMESTAMP) - -#define FEBRUARY 2 -#define STARTOFTIME 1970 -#define SECDAY 86400L -#define SECYR (SECDAY * 365) -#define leapyear(year) ((year) % 4 == 0) -#define days_in_year(a) (leapyear(a) ? 366 : 365) -#define days_in_month(a) (month_days[(a) - 1]) - -static int month_offset[] = { - 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 -}; - -/* - * This only works for the Gregorian calendar - i.e. after 1752 (in the UK) - */ -int rtc_calc_weekday(struct rtc_time *tm) -{ - int leaps_to_date; - int last_year; - int day; - - if (tm->tm_year < 1753) - return -1; - last_year = tm->tm_year - 1; - - /* Number of leap corrections to apply up to end of last year */ - leaps_to_date = last_year / 4 - last_year / 100 + last_year / 400; - - /* - * This year is a leap year if it is divisible by 4 except when it is - * divisible by 100 unless it is divisible by 400 - * - * e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 is. - */ - if (tm->tm_year % 4 == 0 && - ((tm->tm_year % 100 != 0) || (tm->tm_year % 400 == 0)) && - tm->tm_mon > 2) { - /* We are past Feb. 29 in a leap year */ - day = 1; - } else { - day = 0; - } - - day += last_year * 365 + leaps_to_date + month_offset[tm->tm_mon - 1] + - tm->tm_mday; - tm->tm_wday = day % 7; - - return 0; -} - -/* - * Converts Gregorian date to seconds since 1970-01-01 00:00:00. - * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 - * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. - * - * [For the Julian calendar (which was used in Russia before 1917, - * Britain & colonies before 1752, anywhere else before 1582, - * and is still in use by some communities) leave out the - * -year / 100 + year / 400 terms, and add 10.] - * - * This algorithm was first published by Gauss (I think). - * - * WARNING: this function will overflow on 2106-02-07 06:28:16 on - * machines where long is 32-bit! (However, as time_t is signed, we - * will already get problems at other places on 2038-01-19 03:14:08) - */ -unsigned long rtc_mktime(const struct rtc_time *tm) -{ - int mon = tm->tm_mon; - int year = tm->tm_year; - int days, hours; - - mon -= 2; - if (0 >= (int)mon) { /* 1..12 -> 11, 12, 1..10 */ - mon += 12; /* Puts Feb last since it has leap day */ - year -= 1; - } - - days = (unsigned long)(year / 4 - year / 100 + year / 400 + - 367 * mon / 12 + tm->tm_mday) + - year * 365 - 719499; - hours = days * 24 + tm->tm_hour; - return (hours * 60 + tm->tm_min) * 60 + tm->tm_sec; -} - -#endif |