drivers/rtc/mc13xxx-rtc.c

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