1/*
2 * Machine dependent access functions for RTC registers.
3 */
4#ifndef _ASM_MC146818RTC_H
5#define _ASM_MC146818RTC_H
6
7#include <linux/io.h>
8#include <linux/kernel.h>
9
10#define RTC_IRQ BUILD_BUG_ON(1)
11
12#ifndef RTC_PORT
13#define RTC_PORT(x)	(0x70 + (x))
14#define RTC_ALWAYS_BCD	1	/* RTC operates in binary mode */
15#endif
16
17/*
18 * The yet supported machines all access the RTC index register via
19 * an ISA port access but the way to access the date register differs ...
20 */
21#define CMOS_READ(addr) ({ \
22outb_p((addr),RTC_PORT(0)); \
23inb_p(RTC_PORT(1)); \
24})
25#define CMOS_WRITE(val, addr) ({ \
26outb_p((addr),RTC_PORT(0)); \
27outb_p((val),RTC_PORT(1)); \
28})
29
30#endif /* _ASM_MC146818RTC_H */
31