SensorHAL: clear previous light value on enable

Sensor HAL changes to make light sensor value to be reported on
enabling light sensor.
- Ignore the dummy initial value -1 that is pushed by driver
- Set previous light value to -1 on enable

Change-Id: Iaa64fb02f4b82339ba96146d170ca447f409a5ad
Signed-off-by: Vishnudev Ramakrishnan <vramakri@sta.samsung.com>

2 files changed, 9 insertions, 0 deletions

diff --git a/libsensors/LightSensor.cpp b/libsensors/LightSensor.cpp
index 8c111f9..15ae4e2 100644
--- a/libsensors/LightSensor.cpp
+++ b/libsensors/LightSensor.cpp
@@ -34,7 +34,15 @@ LightSensor::LightSensor()
     mPreviousLight = -1;
 }
 
+int LightSensor::handleEnable(int en) {
+    mPreviousLight = -1;
+    return 0;
+}
+
 bool LightSensor::handleEvent(input_event const *event) {
+    if (event->value == -1) {
+        return false;
+    }
     mPendingEvent.light = indexToValue(event->value);
     if (mPendingEvent.light != mPreviousLight) {
         mPreviousLight = mPendingEvent.light;
diff --git a/libsensors/LightSensor.h b/libsensors/LightSensor.h
index ed639f4..ed3b435 100644
--- a/libsensors/LightSensor.h
+++ b/libsensors/LightSensor.h
@@ -33,6 +33,7 @@ struct input_event;
 class LightSensor:public SamsungSensorBase {
 
     float mPreviousLight;
+    virtual int handleEnable(int en);
     virtual bool handleEvent(input_event const * event);
     float indexToValue(size_t index) const;
 public: