arch/powerpc/include/asm/mc146818rtc.h

   1 #ifndef _ASM_POWERPC_MC146818RTC_H
   2 #define _ASM_POWERPC_MC146818RTC_H
   3
   4 /*
   5  * Machine dependent access functions for RTC registers.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifdef __KERNEL__
  14
  15 #include <asm/io.h>
  16
  17 #ifndef RTC_PORT
  18 #define RTC_PORT(x)     (0x70 + (x))
  19 #define RTC_ALWAYS_BCD  1       /* RTC operates in binary mode */
  20 #endif
  21
  22 /*
  23  * The yet supported machines all access the RTC index register via
  24  * an ISA port access but the way to access the date register differs ...
  25  */
  26 #define CMOS_READ(addr) ({ \
  27 outb_p((addr),RTC_PORT(0)); \
  28 inb_p(RTC_PORT(1)); \
  29 })
  30 #define CMOS_WRITE(val, addr) ({ \
  31 outb_p((addr),RTC_PORT(0)); \
  32 outb_p((val),RTC_PORT(1)); \
  33 })
  34
  35 #endif  /* __KERNEL__ */
  36 #endif  /* _ASM_POWERPC_MC146818RTC_H */