arch/arm/include/asm/mc146818rtc.h

   1 /*
   2  * Machine dependent access functions for RTC registers.
   3  */
   4 #ifndef _ASM_MC146818RTC_H
   5 #define _ASM_MC146818RTC_H
   6
   7 #include <linux/io.h>
   8 #include <linux/kernel.h>
   9
  10 #define RTC_IRQ BUILD_BUG_ON(1)
  11
  12 #ifndef RTC_PORT
  13 #define RTC_PORT(x)     (0x70 + (x))
  14 #define RTC_ALWAYS_BCD  1       /* RTC operates in binary mode */
  15 #endif
  16
  17 /*
  18  * The yet supported machines all access the RTC index register via
  19  * an ISA port access but the way to access the date register differs ...
  20  */
  21 #define CMOS_READ(addr) ({ \
  22 outb_p((addr),RTC_PORT(0)); \
  23 inb_p(RTC_PORT(1)); \
  24 })
  25 #define CMOS_WRITE(val, addr) ({ \
  26 outb_p((addr),RTC_PORT(0)); \
  27 outb_p((val),RTC_PORT(1)); \
  28 })
  29
  30 #endif /* _ASM_MC146818RTC_H */