arch/sparc/include/asm/mc146818rtc_64.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Machine dependent access functions for RTC registers.
   4  */
   5 #ifndef __ASM_SPARC64_MC146818RTC_H
   6 #define __ASM_SPARC64_MC146818RTC_H
   7
   8 #include <asm/io.h>
   9
  10 #ifndef RTC_PORT
  11 extern unsigned long cmos_regs;
  12 #define RTC_PORT(x)     (cmos_regs + (x))
  13 #define RTC_ALWAYS_BCD  0
  14 #endif
  15
  16 /*
  17  * The yet supported machines all access the RTC index register via
  18  * an ISA port access but the way to access the date register differs ...
  19  */
  20 #define CMOS_READ(addr) ({ \
  21 outb_p((addr),RTC_PORT(0)); \
  22 inb_p(RTC_PORT(1)); \
  23 })
  24 #define CMOS_WRITE(val, addr) ({ \
  25 outb_p((addr),RTC_PORT(0)); \
  26 outb_p((val),RTC_PORT(1)); \
  27 })
  28
  29 #endif /* __ASM_SPARC64_MC146818RTC_H */