mc146818rtc.h
925 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1998, 2001, 03 by Ralf Baechle
* Copyright (C) 2007 Thomas Bogendoerfer
*
* RTC routines for Jazz style attached Dallas chip.
*/
#ifndef __ASM_MACH_JAZZ_MC146818RTC_H
#define __ASM_MACH_JAZZ_MC146818RTC_H
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/jazz.h>
#define RTC_PORT(x) (0x70 + (x))
#define RTC_IRQ 8
static inline unsigned char CMOS_READ(unsigned long addr)
{
outb_p(addr, RTC_PORT(0));
return *(volatile char *)JAZZ_RTC_BASE;
}
static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
{
outb_p(addr, RTC_PORT(0));
*(volatile char *)JAZZ_RTC_BASE = data;
}
#define RTC_ALWAYS_BCD 0
#define mc146818_decode_year(year) ((year) + 1980)
#endif /* __ASM_MACH_JAZZ_MC146818RTC_H */