board/ge/common/ge_rtc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2017 General Electric Company
   4  */
   5
   6 #include <common.h>
   7 #include <env.h>
   8 #include <dm/uclass.h>
   9 #include <rtc.h>
  10
  11 void check_time(void)
  12 {
  13         struct udevice *dev;
  14         int ret, i;
  15         struct rtc_time tm;
  16         u8 retry = 3;
  17
  18         ret = uclass_get_device(UCLASS_RTC, 0, &dev);
  19         if (ret) {
  20                 env_set("rtc_status", "FAIL");
  21                 return;
  22         }
  23
  24         for (i = 0; i < retry; i++) {
  25                 ret = dm_rtc_get(dev, &tm);
  26                 if (!ret || ret == -EINVAL)
  27                         break;
  28         }
  29
  30         if (!ret && tm.tm_year > 2037) {
  31                 tm.tm_sec  = 0;
  32                 tm.tm_min  = 0;
  33                 tm.tm_hour = 0;
  34                 tm.tm_mday = 1;
  35                 tm.tm_wday = 2;
  36                 tm.tm_mon  = 1;
  37                 tm.tm_year = 2036;
  38
  39                 for (i = 0; i < retry; i++) {
  40                         ret = dm_rtc_set(dev, &tm);
  41                         if (!ret)
  42                                 break;
  43                 }
  44
  45                 if (ret >= 0)
  46                         ret = 2038;
  47         }
  48
  49         if (ret < 0)
  50                 env_set("rtc_status", "FAIL");
  51         else if (ret == 2038)
  52                 env_set("rtc_status", "2038");
  53         else
  54                 env_set("rtc_status", "OK");
  55 }
  56