Viewing file:  mc146818rtc.h (970 B) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
* Copyright (C) 2003 by Ralf Baechle
*
* RTC routines for Malta style attached PIIX4 device, which contains a
* Motorola MC146818A-compatible Real Time Clock.
*/
#ifndef __ASM_MACH_MALTA_MC146818RTC_H
#define __ASM_MACH_MALTA_MC146818RTC_H
#include <asm/io.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/malta.h>
#define RTC_PORT(x) (0x70 + (x))
#define RTC_IRQ 8
static inline unsigned char CMOS_READ(unsigned long addr)
{
outb(addr, MALTA_RTC_ADR_REG);
return inb(MALTA_RTC_DAT_REG);
}
static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
{
outb(addr, MALTA_RTC_ADR_REG);
outb(data, MALTA_RTC_DAT_REG);
}
#define RTC_ALWAYS_BCD 0
#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900)
#endif /* __ASM_MACH_MALTA_MC146818RTC_H */
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