1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Carsten Langgaard, carstenl@mips.com 4*4882a593Smuzhiyun * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. 5*4882a593Smuzhiyun * Copyright (C) 2003 by Ralf Baechle 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * RTC routines for Malta style attached PIIX4 device, which contains a 8*4882a593Smuzhiyun * Motorola MC146818A-compatible Real Time Clock. 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun #ifndef __ASM_MACH_MALTA_MC146818RTC_H 11*4882a593Smuzhiyun #define __ASM_MACH_MALTA_MC146818RTC_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <asm/io.h> 14*4882a593Smuzhiyun #include <asm/mips-boards/generic.h> 15*4882a593Smuzhiyun #include <asm/mips-boards/malta.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #define RTC_PORT(x) (0x70 + (x)) 18*4882a593Smuzhiyun #define RTC_IRQ 8 19*4882a593Smuzhiyun CMOS_READ(unsigned long addr)20*4882a593Smuzhiyunstatic inline unsigned char CMOS_READ(unsigned long addr) 21*4882a593Smuzhiyun { 22*4882a593Smuzhiyun outb(addr, MALTA_RTC_ADR_REG); 23*4882a593Smuzhiyun return inb(MALTA_RTC_DAT_REG); 24*4882a593Smuzhiyun } 25*4882a593Smuzhiyun CMOS_WRITE(unsigned char data,unsigned long addr)26*4882a593Smuzhiyunstatic inline void CMOS_WRITE(unsigned char data, unsigned long addr) 27*4882a593Smuzhiyun { 28*4882a593Smuzhiyun outb(addr, MALTA_RTC_ADR_REG); 29*4882a593Smuzhiyun outb(data, MALTA_RTC_DAT_REG); 30*4882a593Smuzhiyun } 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #define RTC_ALWAYS_BCD 0 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900) 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #endif /* __ASM_MACH_MALTA_MC146818RTC_H */ 37