mc146818rtc.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2#ifndef _ASM_POWERPC_MC146818RTC_H
 3#define _ASM_POWERPC_MC146818RTC_H
 4
 5/*
 6 * Machine dependent access functions for RTC registers.
 7 */
 8
 9#ifdef __KERNEL__
10
11#include <asm/io.h>
12
13#ifndef RTC_PORT
14#define RTC_PORT(x)	(0x70 + (x))
15#define RTC_ALWAYS_BCD	1	/* RTC operates in binary mode */
16#endif
17
18/*
19 * The yet supported machines all access the RTC index register via
20 * an ISA port access but the way to access the date register differs ...
21 */
22#define CMOS_READ(addr) ({ \
23outb_p((addr),RTC_PORT(0)); \
24inb_p(RTC_PORT(1)); \
25})
26#define CMOS_WRITE(val, addr) ({ \
27outb_p((addr),RTC_PORT(0)); \
28outb_p((val),RTC_PORT(1)); \
29})
30
31#endif	/* __KERNEL__ */
32#endif	/* _ASM_POWERPC_MC146818RTC_H */