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#endif /* __ASM_MACH_MALTA_MC146818RTC_H */