mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
fc4860c089
On x86 we use CMOS RAM to read and write some settings. Add basic support for this, including access to registers 128-255. Signed-off-by: Simon Glass <sjg@chromium.org>
90 lines
1.8 KiB
C
90 lines
1.8 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);
|
|
|
|
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_ */
|