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mc146818rtc.h
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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  * Copyright (C) 2000 Harald Koerfgen
8  *
9  * RTC routines for IP32 style attached Dallas chip.
10  */
11 #ifndef __ASM_MACH_IP32_MC146818RTC_H
12 #define __ASM_MACH_IP32_MC146818RTC_H
13 
14 #include <asm/ip32/mace.h>
15 
16 #define RTC_PORT(x) (0x70 + (x))
17 
18 static unsigned char CMOS_READ(unsigned long addr)
19 {
20  return mace->isa.rtc[addr << 8];
21 }
22 
23 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
24 {
25  mace->isa.rtc[addr << 8] = data;
26 }
27 
28 /*
29  * FIXME: Do it right. For now just assume that no one lives in 20th century
30  * and no O2 user in 22th century ;-)
31  */
32 #define mc146818_decode_year(year) ((year) + 2000)
33 
34 #define RTC_ALWAYS_BCD 0
35 
36 #endif /* __ASM_MACH_IP32_MC146818RTC_H */