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 27 static inline unsigned char CMOS_READ(unsigned long addr) 28 { 29 return dec_rtc_base[addr * 4]; 30 } 31 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