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 0
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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.