rtc.h
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/*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Generic RTC interface.
*/
#ifndef _RTC_H_
#define _RTC_H_
/* bcd<->bin functions are needed by almost all the RTC drivers, let's include
* it there instead of in evey single driver */
#include <bcd.h>
/*
* The struct used to pass data from the generic interface code to
* the hardware dependend low-level code ande vice versa. Identical
* to struct rtc_time used by the Linux kernel.
*
* Note that there are small but significant differences to the
* common "struct time":
*
* struct time: struct rtc_time:
* tm_mon 0 ... 11 1 ... 12
* tm_year years since 1900 years since 0
*/
struct rtc_time {
int tm_sec;
int tm_min;
int tm_hour;
int tm_mday;
int tm_mon;
int tm_year;
int tm_wday;
int tm_yday;
int tm_isdst;
};
int rtc_get (struct rtc_time *);
int rtc_set (struct rtc_time *);
void rtc_reset (void);
void GregorianDay (struct rtc_time *);
void to_tm (int, struct rtc_time *);
unsigned long mktime (unsigned int, unsigned int, unsigned int,
unsigned int, unsigned int, unsigned int);
/**
* rtc_read8() - Read an 8-bit register
*
* @reg: Register to read
* @return value read
*/
int rtc_read8(int reg);
/**
* rtc_write8() - Write an 8-bit register
*
* @reg: Register to write
* @value: Value to write
*/
void rtc_write8(int reg, uchar val);
/**
* rtc_read32() - Read a 32-bit value from the RTC
*
* @reg: Offset to start reading from
* @return value read
*/
u32 rtc_read32(int reg);
/**
* rtc_write32() - Write a 32-bit value to the RTC
*
* @reg: Register to start writing to
* @value: Value to write
*/
void rtc_write32(int reg, u32 value);
/**
* rtc_init() - Set up the real time clock ready for use
*/
void rtc_init(void);
#endif /* _RTC_H_ */