forked from rrcarlosr/Jetpack
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
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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 <tremyfr@yahoo.fr>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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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struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
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writel(0, &rtc_regs->dayr);
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writel(0, &rtc_regs->hourmin);
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writel(0, &rtc_regs->seconds);
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}
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