[u-boot.git] / include / rtc.h

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * 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_ */
Commit	Line	Data
a6840a6e WD	1	/*
	2	* (C) Copyright 2001
	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
a6840a6e WD	6	*/
	7
	8	/*
	9	* Generic RTC interface.
	10	*/
	11	#ifndef _RTC_H_
	12	#define _RTC_H_
	13
885fc78c AT	14	/* bcd<->bin functions are needed by almost all the RTC drivers, let's include
	15	* it there instead of in evey single driver */
	16
	17	#include <bcd.h>
	18
a6840a6e WD	19	/*
	20	* The struct used to pass data from the generic interface code to
	21	* the hardware dependend low-level code ande vice versa. Identical
	22	* to struct rtc_time used by the Linux kernel.
	23	*
	24	* Note that there are small but significant differences to the
	25	* common "struct time":
	26	*
53677ef1	27	* struct time: struct rtc_time:
a6840a6e WD	28	* tm_mon 0 ... 11 1 ... 12
	29	* tm_year years since 1900 years since 0
	30	*/
	31
	32	struct rtc_time {
	33	int tm_sec;
	34	int tm_min;
	35	int tm_hour;
	36	int tm_mday;
	37	int tm_mon;
	38	int tm_year;
	39	int tm_wday;
	40	int tm_yday;
	41	int tm_isdst;
	42	};
	43
b73a19e1	44	int rtc_get (struct rtc_time *);
d1e23194	45	int rtc_set (struct rtc_time *);
a6840a6e WD	46	void rtc_reset (void);
	47
	48	void GregorianDay (struct rtc_time *);
	49	void to_tm (int, struct rtc_time *);
	50	unsigned long mktime (unsigned int, unsigned int, unsigned int,
	51	unsigned int, unsigned int, unsigned int);
	52
fc4860c0 SG	53	/**
	54	* rtc_read8() - Read an 8-bit register
	55	*
	56	* @reg: Register to read
	57	* @return value read
	58	*/
	59	int rtc_read8(int reg);
	60
	61	/**
	62	* rtc_write8() - Write an 8-bit register
	63	*
	64	* @reg: Register to write
	65	* @value: Value to write
	66	*/
	67	void rtc_write8(int reg, uchar val);
	68
	69	/**
	70	* rtc_read32() - Read a 32-bit value from the RTC
	71	*
	72	* @reg: Offset to start reading from
	73	* @return value read
	74	*/
	75	u32 rtc_read32(int reg);
	76
	77	/**
	78	* rtc_write32() - Write a 32-bit value to the RTC
	79	*
	80	* @reg: Register to start writing to
	81	* @value: Value to write
	82	*/
	83	void rtc_write32(int reg, u32 value);
	84
c6577f72 SG	85	/**
	86	* rtc_init() - Set up the real time clock ready for use
	87	*/
	88	void rtc_init(void);
	89
a6840a6e	90	#endif /* _RTC_H_ */