summaryrefslogtreecommitdiff
path: root/thermal/utils/battery_threshold.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'thermal/utils/battery_threshold.cpp')
-rw-r--r--thermal/utils/battery_threshold.cpp249
1 files changed, 0 insertions, 249 deletions
diff --git a/thermal/utils/battery_threshold.cpp b/thermal/utils/battery_threshold.cpp
deleted file mode 100644
index 8dc196c..0000000
--- a/thermal/utils/battery_threshold.cpp
+++ /dev/null
@@ -1,249 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/strings.h>
-#include "battery_threshold.h"
-
-namespace android {
-namespace hardware {
-namespace thermal {
-namespace V1_1 {
-namespace implementation {
-
-enum class AgeRange
-{
- Fresh,
- Above200,
- Above400,
- Above600,
- Above900
-};
-enum class TempRange
-{
- AboveZero,
- ZeroToNegFive,
- NegFiveToNegTen,
- BelowNegTen
-};
-
-namespace {
-
-TempRange rangeFromTemp(float current_temp)
-{
- if (current_temp >= 0.0) {
- return TempRange::AboveZero;
- }
- if ((current_temp >= -5.0) && (current_temp < 0.0)) {
- return TempRange::ZeroToNegFive;
- }
- if ((current_temp >= -10.0) && (current_temp < -5.0)) {
- return TempRange::NegFiveToNegTen;
- }
- if ((current_temp < -10.0)) {
- return TempRange::BelowNegTen;
- }
- return TempRange::AboveZero;
-}
-
-AgeRange ageFromCC(int cycle_count)
-{
- if ( cycle_count < 200) {
- return AgeRange::Fresh;
- }
- if (( cycle_count >= 200) && (cycle_count < 400)) {
- return AgeRange::Above200;
- }
- if (( cycle_count >= 400) && (cycle_count < 600)) {
- return AgeRange::Above400;
- }
- if (( cycle_count >= 600) && (cycle_count < 900)) {
- return AgeRange::Above600;
- }
- return AgeRange::Above900;
-}
-
-std::ostream& operator<<(std::ostream& os, const AgeRange& age)
-{
- switch (age) {
- case AgeRange::Fresh:
- os << "Fresh";
- break;
- case AgeRange::Above200:
- os << "Above200";
- break;
- case AgeRange::Above400:
- os << "Above400";
- break;
- case AgeRange::Above600:
- os << "Above600";
- break;
- case AgeRange::Above900:
- os << "Above900";
- break;
- default:
- break;
- }
- return os;
-}
-
-std::ostream& operator<<(std::ostream& os, const TempRange& temp)
-{
- switch (temp) {
- case TempRange::AboveZero:
- os << "AboveZero";
- break;
- case TempRange::ZeroToNegFive:
- os << "ZeroToNegFive";
- break;
- case TempRange::NegFiveToNegTen:
- os << "NegFiveToNegTen";
- break;
- case TempRange::BelowNegTen:
- os << "BelowNegTen";
- break;
- default:
- break;
- }
- return os;
-}
-} // namespace
-
-bool BatteryThresholdLUT::readCycleCount(int& cycle_count) const
-{
- std::string contents;
- if (!android::base::ReadFileToString(cycle_count_filename_, &contents)) {
- return false;
- }
- cycle_count = std::stoi(android::base::Trim(contents));
- return true;
-}
-
-bool BatteryThresholdLUT::readSoC(int& soc) const
-{
- std::string contents;
- if (!android::base::ReadFileToString(
- state_of_charge_filename_, &contents)) {
- return false;
- }
- soc = std::stoi(android::base::Trim(contents));
- return true;
-}
-
-bool BatteryThresholdLUT::readStatus(std::string& status) const
-{
- if (!android::base::ReadFileToString(status_filename_, &status)) {
- return false;
- }
- status = android::base::Trim(status);
- return true;
-}
-
-constexpr float kThresholdDecrease = 5.0;
-float BatteryThresholdLUT::adjustThreshold(
- float configured_threshold, float current_temperature) const
-{
- int current_soc = 100;
- int cycle_count = 0;
- std::string status;
- bool rc = readStatus(status);
- if (!rc || status != "Discharging") {
- return configured_threshold;
- }
-
- TempRange temp_range = rangeFromTemp(current_temperature);
-
- if (!readCycleCount(cycle_count)) {
- return configured_threshold;
- }
- AgeRange age = ageFromCC(cycle_count);
-
- auto it = battery_conditions_lut_.find({temp_range, age});
- if (it == battery_conditions_lut_.end()) {
- return configured_threshold;
- }
- int low_soc = it->second;
-
- if (!readSoC(current_soc) || (low_soc <= current_soc)) {
- return configured_threshold;
- }
-
- //TODO: We should expand the semantics of the Thermal Hal so that the
- // temperature thresholds have a max and a min. For now, just set the
- // threshold below the actual value.
- float low_temp_threshold = current_temperature - kThresholdDecrease;
- LOG(DEBUG) << "Low temp and battery conditions present."
- << " (cycle_count: " << cycle_count
- << " SoC: " << current_soc
- << " temperature: " << current_temperature << ")\n"
- << " Recommending threshold : " << low_temp_threshold;
- return low_temp_threshold;
-}
-
-BatteryThresholdLUT::BatteryThresholdLUT() :
- battery_conditions_lut_ {
- {{ TempRange::ZeroToNegFive, AgeRange::Above900 }, 40 },
- {{ TempRange::NegFiveToNegTen, AgeRange::Above400 }, 5 },
- {{ TempRange::NegFiveToNegTen, AgeRange::Above600 }, 15 },
- {{ TempRange::NegFiveToNegTen, AgeRange::Above900 }, 50 },
- {{ TempRange::BelowNegTen, AgeRange::Fresh }, 5 },
- {{ TempRange::BelowNegTen, AgeRange::Above200 }, 12 },
- {{ TempRange::BelowNegTen, AgeRange::Above400 }, 45 },
- {{ TempRange::BelowNegTen, AgeRange::Above600 }, 60 },
- {{ TempRange::BelowNegTen, AgeRange::Above900 }, 100 }
- },
- cycle_count_filename_{"/sys/class/power_supply/battery/cycle_count"},
- state_of_charge_filename_{"/sys/class/power_supply/battery/capacity"},
- status_filename_{"/sys/class/power_supply/battery/status"}
-{
-}
-
-bool BatteryThresholdLUT::fillBatteryThresholdDebugInfo(
- std::ostringstream& dump_buf) const
-{
- int soc = -1;
- int cycle_count = -1;
- std::string status;
- bool rc = readSoC(soc);
- rc |= readCycleCount(cycle_count);
- rc |= readStatus(status);
-
- dump_buf << "ThermalBattery: Status: " << status
- << " SoC: " << soc
- << " Cycle count: " << cycle_count << std::endl;
- dump_buf << "ThermalBattery: LookupTable: " << std::endl;
-
- for (const auto & entry : battery_conditions_lut_) {
- dump_buf << "\t(Temp: " << entry.first.first
- << ", Age: " << entry.first.second
- << ") -> " << entry.second << " SoC Level" << std::endl;
- }
- return rc;
-
-}
-
-size_t BatteryThresholdLUT::TempAgeHash::operator()(
- const std::pair<TempRange, AgeRange>& k) const
-{
- return static_cast<size_t>(k.first) << 16 | static_cast<size_t>(k.second);
-}
-
-} // namespace implementation
-} // namespace V1_1
-} // namespace thermal
-} // namespace hardware
-} // namespace android
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-20 00:43:30 +0000