1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1998, 2001, 03 by Ralf Baechle
7 *
8 * RTC routines for PC style attached Dallas chip.
9 */
10#ifndef __ASM_MACH_GENERIC_MC146818RTC_H
11#define __ASM_MACH_GENERIC_MC146818RTC_H
12
13#include <asm/io.h>
14
15#define RTC_PORT(x)	(0x70 + (x))
16#define RTC_IRQ		8
17
18static inline unsigned char CMOS_READ(unsigned long addr)
19{
20	outb_p(addr, RTC_PORT(0));
21	return inb_p(RTC_PORT(1));
22}
23
24static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
25{
26	outb_p(addr, RTC_PORT(0));
27	outb_p(data, RTC_PORT(1));
28}
29
30#define RTC_ALWAYS_BCD	1
31
32#ifndef mc146818_decode_year
33#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900)
34#endif
35
36#endif /* __ASM_MACH_GENERIC_MC146818RTC_H */
37