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kernel/linux-rt-4.4.41/arch/powerpc/include/asm/mc146818rtc.h 943 Bytes
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  #ifndef _ASM_POWERPC_MC146818RTC_H
  #define _ASM_POWERPC_MC146818RTC_H
  
  /*
   * Machine dependent access functions for RTC registers.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #ifdef __KERNEL__
  
  #include <asm/io.h>
  
  #ifndef RTC_PORT
  #define RTC_PORT(x)	(0x70 + (x))
  #define RTC_ALWAYS_BCD	1	/* RTC operates in binary mode */
  #endif
  
  /*
   * The yet supported machines all access the RTC index register via
   * an ISA port access but the way to access the date register differs ...
   */
  #define CMOS_READ(addr) ({ \
  outb_p((addr),RTC_PORT(0)); \
  inb_p(RTC_PORT(1)); \
  })
  #define CMOS_WRITE(val, addr) ({ \
  outb_p((addr),RTC_PORT(0)); \
  outb_p((val),RTC_PORT(1)); \
  })
  
  #endif	/* __KERNEL__ */
  #endif	/* _ASM_POWERPC_MC146818RTC_H */