mc146818rtc.h

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/*
 * 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
 *
 * RTC routines for PC style attached Dallas chip.
 */
#ifndef __ASM_MACH_GENERIC_MC146818RTC_H
#define __ASM_MACH_GENERIC_MC146818RTC_H

#include <asm/io.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 inb_p(RTC_PORT(1));
}

static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
{
    outb_p(addr, RTC_PORT(0));
    outb_p(data, RTC_PORT(1));
}

#define RTC_ALWAYS_BCD  1

#ifndef mc146818_decode_year
#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900)
#endif

#endif /* __ASM_MACH_GENERIC_MC146818RTC_H */