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37 lines
882 B
37 lines
882 B
20 years ago
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1998, 2001, 03 by Ralf Baechle
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*
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* RTC routines for PC style attached Dallas chip.
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*/
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#ifndef __ASM_MACH_GENERIC_MC146818RTC_H
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#define __ASM_MACH_GENERIC_MC146818RTC_H
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#include <asm/io.h>
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#define RTC_PORT(x) (0x70 + (x))
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#define RTC_IRQ 8
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static inline unsigned char CMOS_READ(unsigned long addr)
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{
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outb_p(addr, RTC_PORT(0));
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return inb_p(RTC_PORT(1));
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}
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static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
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{
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outb_p(addr, RTC_PORT(0));
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outb_p(data, RTC_PORT(1));
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}
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#define RTC_ALWAYS_BCD 1
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#ifndef mc146818_decode_year
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#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1970)
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#endif
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#endif /* __ASM_MACH_GENERIC_MC146818RTC_H */
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