include/asm-ppc64/mc146818rtc.h

   1 /*
   2  * Machine dependent access functions for RTC registers.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version
   7  * 2 of the License, or (at your option) any later version.
   8  */
   9 #ifndef __ASM_PPC64_MC146818RTC_H
  10 #define __ASM_PPC64_MC146818RTC_H
  11
  12 #include <asm/io.h>
  13
  14 #ifndef RTC_PORT
  15 #define RTC_PORT(x)     (0x70 + (x))
  16 #define RTC_ALWAYS_BCD  1       /* RTC operates in binary mode */
  17 #endif
  18
  19 /*
  20  * The yet supported machines all access the RTC index register via
  21  * an ISA port access but the way to access the date register differs ...
  22  */
  23 #define CMOS_READ(addr) ({ \
  24 outb_p((addr),RTC_PORT(0)); \
  25 inb_p(RTC_PORT(1)); \
  26 })
  27 #define CMOS_WRITE(val, addr) ({ \
  28 outb_p((addr),RTC_PORT(0)); \
  29 outb_p((val),RTC_PORT(1)); \
  30 })
  31
  32 #endif /* __ASM_PPC64_MC146818RTC_H */