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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Generic RTC interface.
* This version contains the part of the user interface to the Real Time Clock
* service. It is used with both the legacy mc146818 and also EFI
* Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
* from <linux/mc146818rtc.h> to this file for 2.4 kernels.
*
* Copyright (C) 1999 Hewlett-Packard Co.
* Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
*/
#ifndef _LINUX_RTC_H_
#define _LINUX_RTC_H_
#include <common.h>
#include <linux/types.h>
extern int rtc_month_days(unsigned int month, unsigned int year);
extern int rtc_valid_tm(struct rtc_time *tm);
extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time);
extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm);
struct rtc_class_ops;
struct rtc_device {
struct device *dev;
struct device class_dev;
struct list_head list;
const struct rtc_class_ops *ops;
};
struct rtc_class_ops {
int (*read_time)(struct rtc_device *, struct rtc_time *);
int (*set_time)(struct rtc_device *, struct rtc_time *);
};
extern int rtc_register(struct rtc_device *rtcdev);
extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm);
extern int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm);
static inline bool is_leap_year(unsigned int year)
{
return (!(year % 4) && (year % 100)) || !(year % 400);
}
#endif /* _LINUX_RTC_H_ */
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