Hysteresis, Inhibit-Stop Timeframe

app/include/fan/Fan.h

@@ -22,6 +22,8 @@ public:
 
   virtual void FindPWMLimits() = 0;
   virtual void AdjustPWMLimits() = 0;
+
+  virtual void EnforceSetValue() = 0;
 };
 
 #endif // FAN_H_

app/include/fan/FanCurve.h

@@ -8,30 +8,32 @@
 #include <fan/HwmonFan.h>
 #include <sensor/Sensor.h>
 
-struct FanStep
-{
+struct FanStep {
   int Temp;
   int Percent;
 };
 
-class FanCurve
-{
+class FanCurve {
 public:
   FanCurve(std::vector<FanStep> steps,
            std::vector<std::shared_ptr<Sensor>> sensors,
            std::vector<std::shared_ptr<Fan>> fans,
-           std::unique_ptr<Aggregator> aggregator);
+           std::unique_ptr<Aggregator> aggregator, int hysteresis);
 
   void DoFanControl();
 
 private:
   int AggregateTemperature();
   void PrintInfo();
+  bool ExceedsHysteresis(int temperature);
+  void ApplyFanPower(std::shared_ptr<Fan> fan, int targetFanPower);
 
   std::vector<FanStep> mSteps;
   std::vector<std::shared_ptr<Sensor>> mTempSensors;
   std::vector<std::shared_ptr<Fan>> mFans;
   std::unique_ptr<Aggregator> mAggregator;
+  int mHystersis;
+  int mLastTemperature;
 };
 
 #endif // FANCURVE_H_

app/include/fan/HwmonFan.h

@@ -30,11 +30,16 @@ public:
   void FindPWMLimits() override;
   void AdjustPWMLimits() override;
 
+  void EnforceSetValue() override;
+
   json toJson() const override;
 
   const std::string toString() const override;
 
 private:
+  bool InhibitStopPeriodExpired();
+  void SetPower(int percent);
+
   std::shared_ptr<PWMControl> mPWMControl;
   std::shared_ptr<Sensor> mRpmSensor;
   std::string mLabel;
@@ -43,6 +48,9 @@ private:
   int mStartPWM = 0;
   bool mZeroFanModeSupported = false;
   std::chrono::time_point<std::chrono::steady_clock> mLastAdjustmentTime;
+  std::chrono::time_point<std::chrono::steady_clock> mLastStartTime;
+  int mSetValue = 0;
+  bool mWasStopped = false;
 };
 
 #endif // HWMONFAN_H_