blob: 097703f1c8cb8d635a7624dd0f8f0170b3b1830a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Machine dependent access functions for RTC registers.
3 */
4#ifndef __ASM_ALPHA_MC146818RTC_H
5#define __ASM_ALPHA_MC146818RTC_H
6
7#include <asm/io.h>
8
9#ifndef RTC_PORT
10#define RTC_PORT(x) (0x70 + (x))
11#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
12#endif
13
14/*
15 * The yet supported machines all access the RTC index register via
16 * an ISA port access but the way to access the date register differs ...
17 */
18#define CMOS_READ(addr) ({ \
19outb_p((addr),RTC_PORT(0)); \
20inb_p(RTC_PORT(1)); \
21})
22#define CMOS_WRITE(val, addr) ({ \
23outb_p((addr),RTC_PORT(0)); \
24outb_p((val),RTC_PORT(1)); \
25})
26
27#endif /* __ASM_ALPHA_MC146818RTC_H */