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  * RTC routines for PC style attached Dallas chip.
7  *
8  * Copyright (C) 1998, 2001 by Ralf Baechle
9  */
10 #include <linux/module.h>
11 #include <linux/mc146818rtc.h>
12 #include <asm/io.h>
13 
std_rtc_read_data(unsigned long addr)14 static unsigned char std_rtc_read_data(unsigned long addr)
15 {
16 	outb_p(addr, RTC_PORT(0));
17 	return inb_p(RTC_PORT(1));
18 }
19 
std_rtc_write_data(unsigned char data,unsigned long addr)20 static void std_rtc_write_data(unsigned char data, unsigned long addr)
21 {
22 	outb_p(addr, RTC_PORT(0));
23 	outb_p(data, RTC_PORT(1));
24 }
25 
std_rtc_bcd_mode(void)26 static int std_rtc_bcd_mode(void)
27 {
28 	return 1;
29 }
30 
31 struct rtc_ops std_rtc_ops = {
32 	&std_rtc_read_data,
33 	&std_rtc_write_data,
34 	&std_rtc_bcd_mode
35 };
36 
37 EXPORT_SYMBOL(rtc_ops);
38