rtc: move date.c from drivers/rtc/ to lib/

In the next commit, rtc_mktime(), for compatibility with linux, will be
implemented using rtc_mktime(), which is no longer drivers/rtc specific.
So move this file under lib/.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>

3 files changed, 1 insertions, 101 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 8778cc7b26..89e71cc7eb 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -7,6 +7,7 @@ menu "Real Time Clock"
 config DM_RTC
 	bool "Enable Driver Model for RTC drivers"
 	depends on DM
+	select LIB_DATE
 	help
 	  Enable drver model for real-time-clock drivers. The RTC uclass
 	  then provides the rtc_get()/rtc_set() interface, delegating to
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index f97a669982..e8875ce10f 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -7,7 +7,6 @@
 obj-$(CONFIG_$(SPL_TPL_)DM_RTC) += rtc-uclass.o
 
 obj-$(CONFIG_RTC_AT91SAM9_RTT) += at91sam9_rtt.o
-obj-y += date.o
 obj-y += rtc-lib.o
 obj-$(CONFIG_RTC_DAVINCI) += davinci.o
 obj-$(CONFIG_RTC_DS1302) += ds1302.o
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