1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2017 General Electric Company 4 */ 5 6 #include <common.h> 7 #include <i2c.h> 8 #include <rtc.h> 9 10 void check_time(void) 11 { 12 int ret, i; 13 struct rtc_time tm; 14 u8 retry = 3; 15 16 unsigned int current_i2c_bus = i2c_get_bus_num(); 17 18 ret = i2c_set_bus_num(CONFIG_SYS_RTC_BUS_NUM); 19 if (ret < 0) 20 return; 21 22 rtc_init(); 23 24 for (i = 0; i < retry; i++) { 25 ret = rtc_get(&tm); 26 if (!ret || ret == -EINVAL) 27 break; 28 } 29 30 if (ret < 0) 31 env_set("rtc_status", "RTC_ERROR"); 32 33 if (tm.tm_year > 2037) { 34 tm.tm_sec = 0; 35 tm.tm_min = 0; 36 tm.tm_hour = 0; 37 tm.tm_mday = 1; 38 tm.tm_wday = 2; 39 tm.tm_mon = 1; 40 tm.tm_year = 2036; 41 42 for (i = 0; i < retry; i++) { 43 ret = rtc_set(&tm); 44 if (!ret) 45 break; 46 } 47 48 if (ret < 0) 49 env_set("rtc_status", "RTC_ERROR"); 50 } 51 52 i2c_set_bus_num(current_i2c_bus); 53 } 54 55