blob: 32ba8a3062ce07f1d2cb4db9af8dcd0ac2020e65 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* Freescale i.MX28 RTC Driver
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <rtc.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
#define MXS_RTC_MAX_TIMEOUT 1000000
/* Set time in seconds since 1970-01-01 */
int mxs_rtc_set_time(uint32_t secs)
{
struct mxs_rtc_regs *rtc_regs = (struct mxs_rtc_regs *)MXS_RTC_BASE;
int ret;
writel(secs, &rtc_regs->hw_rtc_seconds);
/*
* The 0x80 here means seconds were copied to analog. This information
* is taken from the linux kernel driver for the STMP37xx RTC since
* documentation doesn't mention it.
*/
ret = mxs_wait_mask_clr(&rtc_regs->hw_rtc_stat_reg,
0x80 << RTC_STAT_STALE_REGS_OFFSET, MXS_RTC_MAX_TIMEOUT);
if (ret)
printf("MXS RTC: Timeout waiting for update\n");
return ret;
}
int rtc_get(struct rtc_time *time)
{
struct mxs_rtc_regs *rtc_regs = (struct mxs_rtc_regs *)MXS_RTC_BASE;
uint32_t secs;
secs = readl(&rtc_regs->hw_rtc_seconds);
to_tm(secs, time);
return 0;
}
int rtc_set(struct rtc_time *time)
{
uint32_t secs;
secs = mktime(time->tm_year, time->tm_mon, time->tm_mday,
time->tm_hour, time->tm_min, time->tm_sec);
return mxs_rtc_set_time(secs);
}
void rtc_reset(void)
{
struct mxs_rtc_regs *rtc_regs = (struct mxs_rtc_regs *)MXS_RTC_BASE;
int ret;
/* Set time to 1970-01-01 */
mxs_rtc_set_time(0);
/* Reset the RTC block */
ret = mxs_reset_block(&rtc_regs->hw_rtc_ctrl_reg);
if (ret)
printf("MXS RTC: Block reset timeout\n");
}
|
