1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "chre/platform/slpi/system_time_util.h" 18 19 #include "chre/util/time.h" 20 21 extern "C" { 22 23 #include "uTimetick.h" 24 25 } // extern "C" 26 27 namespace chre { 28 29 namespace { 30 31 const uint64_t kClockFreq = uTimetick_CvtToTicks(1, T_SEC); 32 33 } // anonymous namespace 34 getNanosecondsFromQTimerTicks(uint64_t ticks)35uint64_t getNanosecondsFromQTimerTicks(uint64_t ticks) { 36 uint64_t nsec = 0; 37 if (ticks >= kClockFreq) { 38 uint64_t seconds = (ticks / kClockFreq); 39 ticks %= kClockFreq; 40 41 nsec = (seconds * kOneSecondInNanoseconds); 42 } 43 nsec += (ticks * kOneSecondInNanoseconds) / kClockFreq; 44 return nsec; 45 } 46 47 } // namespace chre 48