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 20 static 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 26 static 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 #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900) 35 36 #endif /* __ASM_MACH_MALTA_MC146818RTC_H */ 37