LXR linux/arch/mips/include/asm/mach-malta/mc146818rtc.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Carsten Langgaard, carstenl@mips.com
   4 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
   5 * Copyright (C) 2003 by Ralf Baechle
   6 *
   7 * RTC routines for Malta style attached PIIX4 device, which contains a
   8 * Motorola MC146818A-compatible Real Time Clock.
   9 */
  10#ifndef __ASM_MACH_MALTA_MC146818RTC_H
  11#define __ASM_MACH_MALTA_MC146818RTC_H
  12
  13#include <asm/io.h>
  14#include <asm/mips-boards/generic.h>
  15#include <asm/mips-boards/malta.h>
  16
  17#define RTC_PORT(x)     (0x70 + (x))
  18#define RTC_IRQ         8
  19
  20static inline unsigned char CMOS_READ(unsigned long addr)
  21{
  22        outb(addr, MALTA_RTC_ADR_REG);
  23        return inb(MALTA_RTC_DAT_REG);
  24}
  25
  26static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
  27{
  28        outb(addr, MALTA_RTC_ADR_REG);
  29        outb(data, MALTA_RTC_DAT_REG);
  30}
  31
  32#define RTC_ALWAYS_BCD  0
  33
  34#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900)
  35
  36#endif /* __ASM_MACH_MALTA_MC146818RTC_H */
  37