Cregit: Linux 6.13: mc146818rtc.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Linus Torvalds (pre-git)	36	37.50%	6	50.00%
Linus Torvalds	32	33.33%	1	8.33%
Andrew Morton	21	21.88%	2	16.67%
Ralf Baechle	4	4.17%	1	8.33%
Thomas Gleixner	2	2.08%	1	8.33%
Thomas Bogendoerfer	1	1.04%	1	8.33%
Total	96		12

/* 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 */