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Add TW_QCOM_ATS_OFFSET flag to manually set time/date offset

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Needed if no ats_ files are present on qcom device

Offset is the difference between the current time
and the time since_epoch

To calculate the offset in Android, the following expression
(from a root shell) can be used:
echo "$(( ($(date +%s) - $(cat /sys/class/rtc/rtc0/since_epoch)) ))"

Add 3 zeros to the output and use that in the TW_QCOM_ATS_OFFSET
flag in your BoardConfig.mk

For example, if the result of the calculation is 1642433544,
use 1642433544000 as the offset

Change-Id: I5d58125dffc3fdbfb76a5ffde4e27659376185f1
This commit is contained in:
Captain Throwback
2022-01-20 21:45:42 +00:00
committed by captainthrowback
parent 80c92d9be2
commit 550a199e67
2 changed files with 14 additions and 0 deletions
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Android.mk
+3
View File
@@ -383,6 +383,9 @@ ifneq ($(TW_DEFAULT_LANGUAGE),)
else
LOCAL_CFLAGS += -DTW_DEFAULT_LANGUAGE=en
endif
ifneq ($(TW_QCOM_ATS_OFFSET),)
LOCAL_CFLAGS += -DTW_QCOM_ATS_OFFSET=$(TW_QCOM_ATS_OFFSET)
endif
ifneq ($(TW_CLOCK_OFFSET),)
LOCAL_CFLAGS += -DTW_CLOCK_OFFSET=$(TW_CLOCK_OFFSET)
endif
twrp-functions.cpp
+11
View File
@@ -1052,6 +1052,16 @@ void TWFunc::Fixup_Time_On_Boot(const string& time_paths /* = "" */)
}
if (!fixed) {
#ifdef TW_QCOM_ATS_OFFSET
// Offset is the difference between the current time and the time since_epoch
// To calculate the offset in Android, the following expression (from a root shell) can be used:
// echo "$(( ($(date +%s) - $(cat /sys/class/rtc/rtc0/since_epoch)) ))"
// Add 3 zeros to the output and use that in the TW_QCOM_ATS_OFFSET flag in your BoardConfig.mk
// For example, if the result of the calculation is 1642433544, use 1642433544000 as the offset
offset = (uint64_t) TW_QCOM_ATS_OFFSET;
DataManager::SetValue("tw_qcom_ats_offset", (unsigned long long) offset, 1);
LOGINFO("TWFunc::Fixup_Time: Setting time offset from TW_QCOM_ATS_OFFSET, offset %llu\n", (unsigned long long) offset);
#else
// Failed to get offset from ats file, check twrp settings
unsigned long long value;
if (DataManager::GetValue("tw_qcom_ats_offset", value) < 0) {
@@ -1061,6 +1071,7 @@ void TWFunc::Fixup_Time_On_Boot(const string& time_paths /* = "" */)
LOGINFO("TWFunc::Fixup_Time: Setting time offset from twrp setting file, offset %llu\n", (unsigned long long) offset);
// Do not consider the settings file as a definitive answer, keep fixed=false so next run will try ats files again
}
#endif
}
gettimeofday(&tv, NULL);