LXR uboot/drivers/rtc/mc13xxx-rtc.c

   1/*
   2 * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
   3 *
   4 * See file CREDITS for list of people who contributed to this
   5 * project.
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation; either version 2 of
  10 * the License, or (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20 * MA 02111-1307 USA
  21 */
  22
  23#include <common.h>
  24#include <rtc.h>
  25#include <spi.h>
  26#include <pmic.h>
  27#include <fsl_pmic.h>
  28
  29int rtc_get(struct rtc_time *rtc)
  30{
  31        u32 day1, day2, time;
  32        int tim, i = 0;
  33        struct pmic *p = get_pmic();
  34        int ret;
  35
  36        do {
  37                ret = pmic_reg_read(p, REG_RTC_DAY, &day1);
  38                if (ret < 0)
  39                        return -1;
  40
  41                ret = pmic_reg_read(p, REG_RTC_TIME, &time);
  42                if (ret < 0)
  43                        return -1;
  44
  45                ret = pmic_reg_read(p, REG_RTC_DAY, &day2);
  46                if (ret < 0)
  47                        return -1;
  48
  49        } while (day1 != day2 && i++ < 3);
  50
  51        tim = day1 * 86400 + time;
  52
  53        to_tm(tim, rtc);
  54
  55        rtc->tm_yday = 0;
  56        rtc->tm_isdst = 0;
  57
  58        return 0;
  59}
  60
  61int rtc_set(struct rtc_time *rtc)
  62{
  63        u32 time, day;
  64        struct pmic *p = get_pmic();
  65
  66        time = mktime(rtc->tm_year, rtc->tm_mon, rtc->tm_mday,
  67                      rtc->tm_hour, rtc->tm_min, rtc->tm_sec);
  68        day = time / 86400;
  69        time %= 86400;
  70
  71        pmic_reg_write(p, REG_RTC_DAY, day);
  72        pmic_reg_write(p, REG_RTC_TIME, time);
  73
  74        return 0;
  75}
  76
  77void rtc_reset(void)
  78{
  79}
  80