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1da177e4 LT |
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 | ||
18 | static 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 | ||
24 | static 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 | |
49fa3c08 | 33 | #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900) |
1da177e4 LT |
34 | #endif |
35 | ||
36 | #endif /* __ASM_MACH_GENERIC_MC146818RTC_H */ |