xref: /openbmc/u-boot/drivers/rtc/mc13xxx-rtc.c (revision cd71b1d5)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
4  */
5 
6 #include <common.h>
7 #include <rtc.h>
8 #include <spi.h>
9 #include <power/pmic.h>
10 #include <fsl_pmic.h>
11 
12 int rtc_get(struct rtc_time *rtc)
13 {
14 	u32 day1, day2, time;
15 	int tim, i = 0;
16 	struct pmic *p = pmic_get("FSL_PMIC");
17 	int ret;
18 
19 	if (!p)
20 		return -1;
21 	do {
22 		ret = pmic_reg_read(p, REG_RTC_DAY, &day1);
23 		if (ret < 0)
24 			return -1;
25 
26 		ret = pmic_reg_read(p, REG_RTC_TIME, &time);
27 		if (ret < 0)
28 			return -1;
29 
30 		ret = pmic_reg_read(p, REG_RTC_DAY, &day2);
31 		if (ret < 0)
32 			return -1;
33 
34 	} while (day1 != day2 && i++ < 3);
35 
36 	tim = day1 * 86400 + time;
37 
38 	rtc_to_tm(tim, rtc);
39 
40 	rtc->tm_yday = 0;
41 	rtc->tm_isdst = 0;
42 
43 	return 0;
44 }
45 
46 int rtc_set(struct rtc_time *rtc)
47 {
48 	u32 time, day;
49 	struct pmic *p = pmic_get("FSL_PMIC");
50 	if (!p)
51 		return -1;
52 
53 	time = rtc_mktime(rtc);
54 	day = time / 86400;
55 	time %= 86400;
56 
57 	pmic_reg_write(p, REG_RTC_DAY, day);
58 	pmic_reg_write(p, REG_RTC_TIME, time);
59 
60 	return 0;
61 }
62 
63 void rtc_reset(void)
64 {
65 }
66