lib: move rtc-lib.c to lib

Function rtc_to_tm() is needed for FAT file system support even if we don't
have a real time clock. So move it from drivers/ to lib/.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

2 files changed, 0 insertions, 78 deletions

diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index f668cf9050..331a49ab59 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -7,7 +7,6 @@
 obj-$(CONFIG_$(SPL_TPL_)DM_RTC) += rtc-uclass.o
 
 obj-$(CONFIG_RTC_AT91SAM9_RTT) += at91sam9_rtt.o
-obj-y += rtc-lib.o
 obj-$(CONFIG_RTC_ARMADA38X) += armada38x.o
 obj-$(CONFIG_RTC_DAVINCI) += davinci.o
 obj-$(CONFIG_RTC_DS1302) += ds1302.o
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c
deleted file mode 100644
index 1f7bdade29..0000000000
--- a/drivers/rtc/rtc-lib.c
+++ /dev/null
@@ -1,77 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * rtc and date/time utility functions
- *
- * Copyright (C) 2005-06 Tower Technologies
- * Author: Alessandro Zummo <a.zummo@towertech.it>
- *
- * U-Boot rtc_time differs from Linux rtc_time:
- * - The year field takes the actual value, not year - 1900.
- * - January is month 1.
- */
-
-#include <common.h>
-#include <rtc.h>
-#include <linux/math64.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)
-
-/*
- * 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);
-}
-
-/*
- * rtc_to_tm - Converts u64 to rtc_time.
- * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
- *
- * This function is copied from rtc_time64_to_tm() in the Linux kernel.
- * But in U-Boot January is month 1 and we do not subtract 1900 from the year.
- */
-void rtc_to_tm(u64 time, struct rtc_time *tm)
-{
-	unsigned int month, year, secs;
-	int days;
-
-	days = div_u64_rem(time, 86400, &secs);
-
-	/* 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);
-	while (days < 0) {
-		year -= 1;
-		days += 365 + is_leap_year(year);
-	}
-	tm->tm_year = year; /* Not 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 + 1; /* January = 1 */
-	tm->tm_mday = days + 1;
-
-	tm->tm_hour = secs / 3600;
-	secs -= tm->tm_hour * 3600;
-	tm->tm_min = secs / 60;
-	tm->tm_sec = secs - tm->tm_min * 60;
-
-	/* Zero unused fields */
-	tm->tm_isdst = 0;
-}