linux/drivers/rtc/lib.c

// SPDX-License-Identifier: GPL-2.0
/*
 * rtc and date/time utility functions
 *
 * Copyright (C) 2005-06 Tower Technologies
 * Author: Alessandro Zummo <[email protected]>
 *
 * based on arch/arm/common/rtctime.c and other bits
 *
 * Author: Cassio Neri <[email protected]> (rtc_time64_to_tm)
 */

#include <linux/export.h>
#include <linux/rtc.h>

static const unsigned char rtc_days_in_month[] = …;

static const unsigned short rtc_ydays[2][13] = …;

/*
 * The number of days in the month.
 */
int rtc_month_days(unsigned int month, unsigned int year)
{ … }
EXPORT_SYMBOL(…);

/*
 * The number of days since January 1. (0 to 365)
 */
int rtc_year_days(unsigned int day, unsigned int month, unsigned int year)
{ … }
EXPORT_SYMBOL(…);

/**
 * rtc_time64_to_tm - converts time64_t to rtc_time.
 *
 * @time:	The number of seconds since 01-01-1970 00:00:00.
 *		(Must be positive.)
 * @tm:		Pointer to the struct rtc_time.
 */
void rtc_time64_to_tm(time64_t time, struct rtc_time *tm)
{ … }
EXPORT_SYMBOL(…);

/*
 * Does the rtc_time represent a valid date/time?
 */
int rtc_valid_tm(struct rtc_time *tm)
{ … }
EXPORT_SYMBOL(…);

/*
 * rtc_tm_to_time64 - Converts rtc_time to time64_t.
 * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
 */
time64_t rtc_tm_to_time64(struct rtc_time *tm)
{ … }
EXPORT_SYMBOL(…);

/*
 * Convert rtc_time to ktime
 */
ktime_t rtc_tm_to_ktime(struct rtc_time tm)
{ … }
EXPORT_SYMBOL_GPL(…);

/*
 * Convert ktime to rtc_time
 */
struct rtc_time rtc_ktime_to_tm(ktime_t kt)
{ … }
EXPORT_SYMBOL_GPL(…);