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64 lines
1.2 KiB
64 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Freescale i.MX27 RTC Driver |
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* |
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* Copyright (C) 2012 Philippe Reynes <[email protected]> |
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*/ |
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#include <common.h> |
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#include <rtc.h> |
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#include <asm/io.h> |
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#include <asm/arch/imx-regs.h> |
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#define HOUR_SHIFT 8 |
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#define HOUR_MASK 0x1f |
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#define MIN_SHIFT 0 |
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#define MIN_MASK 0x3f |
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int rtc_get(struct rtc_time *time) |
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{ |
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struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; |
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uint32_t day, hour, min, sec; |
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day = readl(&rtc_regs->dayr); |
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hour = readl(&rtc_regs->hourmin); |
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sec = readl(&rtc_regs->seconds); |
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min = (hour >> MIN_SHIFT) & MIN_MASK; |
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hour = (hour >> HOUR_SHIFT) & HOUR_MASK; |
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sec += min * 60 + hour * 3600 + day * 24 * 3600; |
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rtc_to_tm(sec, time); |
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return 0; |
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} |
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int rtc_set(struct rtc_time *time) |
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{ |
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struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; |
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uint32_t day, hour, min, sec; |
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sec = rtc_mktime(time); |
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day = sec / (24 * 3600); |
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sec = sec % (24 * 3600); |
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hour = sec / 3600; |
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sec = sec % 3600; |
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min = sec / 60; |
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sec = sec % 60; |
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hour = (hour & HOUR_MASK) << HOUR_SHIFT; |
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hour |= (min & MIN_MASK) << MIN_SHIFT; |
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writel(day, &rtc_regs->dayr); |
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writel(hour, &rtc_regs->hourmin); |
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writel(sec, &rtc_regs->seconds); |
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return 0; |
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} |
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void rtc_reset(void) |
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{ |
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/* nothing to do */ |
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}
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