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 * Copyright (C) 2007 Thomas Bogendoerfer
8 *
9 * RTC routines for Jazz style attached Dallas chip.
10 */
11 #ifndef __ASM_MACH_JAZZ_MC146818RTC_H
12 #define __ASM_MACH_JAZZ_MC146818RTC_H
13
14 #include <linux/delay.h>
15
16 #include <asm/io.h>
17 #include <asm/jazz.h>
18
19 #define RTC_PORT(x) (0x70 + (x))
20 #define RTC_IRQ 8
21
22 static inline unsigned char CMOS_READ(unsigned long addr)
23 {
24 outb_p(addr, RTC_PORT(0));
25 return *(volatile char *)JAZZ_RTC_BASE;
26 }
27
28 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
29 {
30 outb_p(addr, RTC_PORT(0));
31 *(volatile char *)JAZZ_RTC_BASE = data;
32 }
33
34 #define RTC_ALWAYS_BCD 0
35
36 #define mc146818_decode_year(year) ((year) + 1980)
37
38 #endif /* __ASM_MACH_JAZZ_MC146818RTC_H */
39
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