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 
16 extern 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 
CMOS_READ(unsigned long addr)27 static inline unsigned char CMOS_READ(unsigned long addr)
28 {
29 	return dec_rtc_base[addr * 4];
30 }
31 
CMOS_WRITE(unsigned char data,unsigned long addr)32 static 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