arch/mips/include/asm/mach-jazz/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  * Copyright (C) 2007 Thomas Bogendoerfer
   8  *
   9  * RTC routines for Jazz style attached Dallas chip.
  10  */
  11 #ifndef __ASM_MACH_JAZZ_MC146818RTC_H
  12 #define __ASM_MACH_JAZZ_MC146818RTC_H
  13
  14 #include <linux/delay.h>
  15
  16 #include <asm/io.h>
  17 #include <asm/jazz.h>
  18
  19 #define RTC_PORT(x)     (0x70 + (x))
  20 #define RTC_IRQ         8
  21
  22 static inline unsigned char CMOS_READ(unsigned long addr)
  23 {
  24         outb_p(addr, RTC_PORT(0));
  25         return *(volatile char *)JAZZ_RTC_BASE;
  26 }
  27
  28 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
  29 {
  30         outb_p(addr, RTC_PORT(0));
  31         *(volatile char *)JAZZ_RTC_BASE = data;
  32 }
  33
  34 #define RTC_ALWAYS_BCD  0
  35
  36 #define mc146818_decode_year(year) ((year) + 1980)
  37
  38 #endif /* __ASM_MACH_JAZZ_MC146818RTC_H */