include/asm-mips/mach-generic/mc146818rtc.h

   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
  33 #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1970)
  34 #endif
  35
  36 #endif /* __ASM_MACH_GENERIC_MC146818RTC_H */