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78befb695d
This driver has been tested on board armadeus apf27. Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr> Acked-by: Stefano Babic <sbabic@denx.de>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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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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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 = mktime(time->tm_year, time->tm_mon, time->tm_mday,
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time->tm_hour, time->tm_min, time->tm_sec);
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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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