1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1998, 2001, 03 by Ralf Baechle 7 * 8 * RTC routines for PC style attached Dallas chip. 9 */ 10 #ifndef __ASM_MACH_GENERIC_MC146818RTC_H 11 #define __ASM_MACH_GENERIC_MC146818RTC_H 12 13 #include <asm/io.h> 14 15 #define RTC_PORT(x) (0x70 + (x)) 16 #define RTC_IRQ 8 17 18 static inline unsigned char CMOS_READ(unsigned long addr) 19 { 20 outb_p(addr, RTC_PORT(0)); 21 return inb_p(RTC_PORT(1)); 22 } 23 24 static inline void CMOS_WRITE(unsigned char data, unsigned long addr) 25 { 26 outb_p(addr, RTC_PORT(0)); 27 outb_p(data, RTC_PORT(1)); 28 } 29 30 #define RTC_ALWAYS_BCD 1 31 32 #ifndef mc146818_decode_year 33 #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900) 34 #endif 35 36 #endif /* __ASM_MACH_GENERIC_MC146818RTC_H */ 37