1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * RTC definitions for DECstation style attached Dallas DS1287 chip.
4 *
5 * Copyright (C) 1998, 2001 by Ralf Baechle
6 * Copyright (C) 1998 by Harald Koerfgen
7 * Copyright (C) 2002, 2005  Maciej W. Rozycki
8 */
9#ifndef __ASM_MIPS_DEC_RTC_DEC_H
10#define __ASM_MIPS_DEC_RTC_DEC_H
11
12#include <linux/types.h>
13#include <asm/addrspace.h>
14#include <asm/dec/system.h>
15
16extern volatile u8 *dec_rtc_base;
17
18#define ARCH_RTC_LOCATION
19
20#define RTC_PORT(x)	CPHYSADDR((long)dec_rtc_base)
21#define RTC_IO_EXTENT	dec_kn_slot_size
22#define RTC_IOMAPPED	0
23#undef RTC_IRQ
24
25#define RTC_DEC_YEAR	0x3f	/* Where we store the real year on DECs.  */
26
27static inline unsigned char CMOS_READ(unsigned long addr)
28{
29	return dec_rtc_base[addr * 4];
30}
31
32static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
33{
34	dec_rtc_base[addr * 4] = data;
35}
36
37#define RTC_ALWAYS_BCD	0
38
39#endif /* __ASM_MIPS_DEC_RTC_DEC_H */
40