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Commit | Line | Data |
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78befb69 | 1 | /* |
2 | * Freescale i.MX27 RTC Driver | |
3 | * | |
4 | * Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr> | |
5 | * | |
1a459660 | 6 | * SPDX-License-Identifier: GPL-2.0+ |
78befb69 | 7 | */ |
8 | ||
9 | #include <common.h> | |
10 | #include <rtc.h> | |
11 | #include <asm/io.h> | |
12 | #include <asm/arch/imx-regs.h> | |
13 | ||
14 | #define HOUR_SHIFT 8 | |
15 | #define HOUR_MASK 0x1f | |
16 | #define MIN_SHIFT 0 | |
17 | #define MIN_MASK 0x3f | |
18 | ||
19 | int rtc_get(struct rtc_time *time) | |
20 | { | |
21 | struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; | |
22 | uint32_t day, hour, min, sec; | |
23 | ||
24 | day = readl(&rtc_regs->dayr); | |
25 | hour = readl(&rtc_regs->hourmin); | |
26 | sec = readl(&rtc_regs->seconds); | |
27 | ||
28 | min = (hour >> MIN_SHIFT) & MIN_MASK; | |
29 | hour = (hour >> HOUR_SHIFT) & HOUR_MASK; | |
30 | ||
31 | sec += min * 60 + hour * 3600 + day * 24 * 3600; | |
32 | ||
9f9276c3 | 33 | rtc_to_tm(sec, time); |
78befb69 | 34 | |
35 | return 0; | |
36 | } | |
37 | ||
38 | int rtc_set(struct rtc_time *time) | |
39 | { | |
40 | struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; | |
41 | uint32_t day, hour, min, sec; | |
42 | ||
71420983 | 43 | sec = rtc_mktime(time); |
78befb69 | 44 | |
45 | day = sec / (24 * 3600); | |
46 | sec = sec % (24 * 3600); | |
47 | hour = sec / 3600; | |
48 | sec = sec % 3600; | |
49 | min = sec / 60; | |
50 | sec = sec % 60; | |
51 | ||
52 | hour = (hour & HOUR_MASK) << HOUR_SHIFT; | |
53 | hour |= (min & MIN_MASK) << MIN_SHIFT; | |
54 | ||
55 | writel(day, &rtc_regs->dayr); | |
56 | writel(hour, &rtc_regs->hourmin); | |
57 | writel(sec, &rtc_regs->seconds); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | void rtc_reset(void) | |
63 | { | |
64 | struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; | |
65 | ||
66 | writel(0, &rtc_regs->dayr); | |
67 | writel(0, &rtc_regs->hourmin); | |
68 | writel(0, &rtc_regs->seconds); | |
69 | } |