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38 lines
1.1 KiB
38 lines
1.1 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "chre/platform/slpi/system_time_util.h"
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#include "chre/util/time.h"
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namespace chre {
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uint64_t getNanosecondsFromQTimerTicks(uint64_t ticks) {
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constexpr uint64_t kClockFreq = 19200000; // 19.2MHz QTimer clock
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uint64_t nsec = 0;
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if (ticks >= kClockFreq) {
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uint64_t seconds = (ticks / kClockFreq);
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ticks %= kClockFreq;
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nsec = (seconds * kOneSecondInNanoseconds);
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}
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nsec += (ticks * kOneSecondInNanoseconds) / kClockFreq;
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return nsec;
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}
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} // namespace chre
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