mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
714209832d
Most callers unpack the structure and pass each member. It seems better to pass the whole structure instead, as with the C library. Also add an rtc_ prefix. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
|
|
* (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);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* rtc_calc_weekday() - Work out the weekday from a time
|
|
*
|
|
* This only works for the Gregorian calendar - i.e. after 1752 (in the UK).
|
|
* It sets time->tm_wdaay to the correct day of the week.
|
|
*
|
|
* @time: Time to inspect. tm_wday is updated
|
|
* @return 0 if OK, -EINVAL if the weekday could not be determined
|
|
*/
|
|
int rtc_calc_weekday(struct rtc_time *time);
|
|
|
|
/**
|
|
* rtc_to_tm() - Convert a time_t value into a broken-out time
|
|
*
|
|
* The following fields are set up by this function:
|
|
* tm_sec, tm_min, tm_hour, tm_mday, tm_mon, tm_year, tm_wday
|
|
*
|
|
* Note that tm_yday and tm_isdst are set to 0.
|
|
*
|
|
* @time_t: Number of seconds since 1970-01-01 00:00:00
|
|
* @time: Place to put the broken-out time
|
|
* @return 0 if OK, -EINVAL if the weekday could not be determined
|
|
*/
|
|
int rtc_to_tm(int time_t, struct rtc_time *time);
|
|
|
|
/**
|
|
* rtc_mktime() - Convert a broken-out time into a time_t value
|
|
*
|
|
* The following fields need to be valid for this function to work:
|
|
* tm_sec, tm_min, tm_hour, tm_mday, tm_mon, tm_year
|
|
*
|
|
* Note that tm_wday and tm_yday are ignored.
|
|
*
|
|
* @time: Broken-out time to convert
|
|
* @return corresponding time_t value, seconds since 1970-01-01 00:00:00
|
|
*/
|
|
unsigned long rtc_mktime(const struct rtc_time *time);
|
|
|
|
#endif /* _RTC_H_ */
|