drivers/rtc/mc13xxx-rtc.c

   1 /*
   2  * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <rtc.h>
   9 #include <spi.h>
  10 #include <power/pmic.h>
  11 #include <fsl_pmic.h>
  12
  13 int rtc_get(struct rtc_time *rtc)
  14 {
  15         u32 day1, day2, time;
  16         int tim, i = 0;
  17         struct pmic *p = pmic_get("FSL_PMIC");
  18         int ret;
  19
  20         if (!p)
  21                 return -1;
  22         do {
  23                 ret = pmic_reg_read(p, REG_RTC_DAY, &day1);
  24                 if (ret < 0)
  25                         return -1;
  26
  27                 ret = pmic_reg_read(p, REG_RTC_TIME, &time);
  28                 if (ret < 0)
  29                         return -1;
  30
  31                 ret = pmic_reg_read(p, REG_RTC_DAY, &day2);
  32                 if (ret < 0)
  33                         return -1;
  34
  35         } while (day1 != day2 && i++ < 3);
  36
  37         tim = day1 * 86400 + time;
  38
  39         rtc_to_tm(tim, rtc);
  40
  41         rtc->tm_yday = 0;
  42         rtc->tm_isdst = 0;
  43
  44         return 0;
  45 }
  46
  47 int rtc_set(struct rtc_time *rtc)
  48 {
  49         u32 time, day;
  50         struct pmic *p = pmic_get("FSL_PMIC");
  51         if (!p)
  52                 return -1;
  53
  54         time = rtc_mktime(rtc);
  55         day = time / 86400;
  56         time %= 86400;
  57
  58         pmic_reg_write(p, REG_RTC_DAY, day);
  59         pmic_reg_write(p, REG_RTC_TIME, time);
  60
  61         return 0;
  62 }
  63
  64 void rtc_reset(void)
  65 {
  66 }