diff --git a/include/android/sensor.h b/include/android/sensor.h
index 878f8ff..77a5a1c 100644
--- a/include/android/sensor.h
+++ b/include/android/sensor.h
@@ -74,6 +74,16 @@
 };
 
 /*
+ * Sensor Reporting Modes.
+ */
+enum {
+    AREPORTING_MODE_CONTINUOUS = 0,
+    AREPORTING_MODE_ON_CHANGE = 1,
+    AREPORTING_MODE_ONE_SHOT = 2,
+    AREPORTING_MODE_SPECIAL_TRIGGER = 3
+};
+
+/*
  * A few useful constants
  */
 
@@ -306,6 +316,11 @@
  */
 const char* ASensor_getStringType(ASensor const* sensor);
 
+/*
+ * Returns the reporting mode for this sensor. One of AREPORTING_MODE_* constants.
+ */
+int ASensor_getReportingMode(ASensor const* sensor);
+
 #ifdef __cplusplus
 };
 #endif
diff --git a/include/gui/Sensor.h b/include/gui/Sensor.h
index c1c98b9..28a08e2 100644
--- a/include/gui/Sensor.h
+++ b/include/gui/Sensor.h
@@ -72,7 +72,9 @@
     const String8& getStringType() const;
     const String8& getRequiredPermission() const;
     int32_t getMaxDelay() const;
+    int32_t getFlags() const;
     bool isWakeUpSensor() const;
+    int32_t getReportingMode() const;
 
     // LightFlattenable protocol
     inline bool isFixedSize() const { return false; }
@@ -96,7 +98,7 @@
     String8 mStringType;
     String8 mRequiredPermission;
     int32_t mMaxDelay;
-    bool    mWakeUpSensor;
+    int32_t mFlags;
     static void flattenString8(void*& buffer, size_t& size, const String8& string8);
     static bool unflattenString8(void const*& buffer, size_t& size, String8& outputString8);
 };
diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp
index 70180f8..a496125 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/gui/Sensor.cpp
@@ -35,7 +35,7 @@
     : mHandle(0), mType(0),
       mMinValue(0), mMaxValue(0), mResolution(0),
       mPower(0), mMinDelay(0), mFifoReservedEventCount(0), mFifoMaxEventCount(0),
-      mMaxDelay(0), mWakeUpSensor(false)
+      mMaxDelay(0), mFlags(0)
 {
 }
 
@@ -51,7 +51,7 @@
     mResolution = hwSensor->resolution;
     mPower = hwSensor->power;
     mMinDelay = hwSensor->minDelay;
-    mWakeUpSensor = false;
+    mFlags = 0;
 
     // Set fifo event count zero for older devices which do not support batching. Fused
     // sensors also have their fifo counts set to zero.
@@ -77,154 +77,177 @@
         mMaxDelay = 0;
     }
 
-    // Ensure existing sensors have correct string type and required
-    // permissions.
+    // Ensure existing sensors have correct string type, required permissions and reporting mode.
     switch (mType) {
     case SENSOR_TYPE_ACCELEROMETER:
         mStringType = SENSOR_STRING_TYPE_ACCELEROMETER;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_AMBIENT_TEMPERATURE:
         mStringType = SENSOR_STRING_TYPE_AMBIENT_TEMPERATURE;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_GAME_ROTATION_VECTOR:
         mStringType = SENSOR_STRING_TYPE_GAME_ROTATION_VECTOR;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR:
         mStringType = SENSOR_STRING_TYPE_GEOMAGNETIC_ROTATION_VECTOR;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_GRAVITY:
         mStringType = SENSOR_STRING_TYPE_GRAVITY;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_GYROSCOPE:
         mStringType = SENSOR_STRING_TYPE_GYROSCOPE;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
         mStringType = SENSOR_STRING_TYPE_GYROSCOPE_UNCALIBRATED;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_HEART_RATE:
         mStringType = SENSOR_STRING_TYPE_HEART_RATE;
         mRequiredPermission = SENSOR_PERMISSION_BODY_SENSORS;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_LIGHT:
         mStringType = SENSOR_STRING_TYPE_LIGHT;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_LINEAR_ACCELERATION:
         mStringType = SENSOR_STRING_TYPE_LINEAR_ACCELERATION;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_MAGNETIC_FIELD:
         mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED:
         mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD_UNCALIBRATED;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_ORIENTATION:
         mStringType = SENSOR_STRING_TYPE_ORIENTATION;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_PRESSURE:
         mStringType = SENSOR_STRING_TYPE_PRESSURE;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_PROXIMITY:
         mStringType = SENSOR_STRING_TYPE_PROXIMITY;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ON_CHANGE_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_RELATIVE_HUMIDITY:
         mStringType = SENSOR_STRING_TYPE_RELATIVE_HUMIDITY;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_ROTATION_VECTOR:
         mStringType = SENSOR_STRING_TYPE_ROTATION_VECTOR;
+        mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
         break;
     case SENSOR_TYPE_SIGNIFICANT_MOTION:
         mStringType = SENSOR_STRING_TYPE_SIGNIFICANT_MOTION;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ONE_SHOT_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_STEP_COUNTER:
         mStringType = SENSOR_STRING_TYPE_STEP_COUNTER;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_STEP_DETECTOR:
         mStringType = SENSOR_STRING_TYPE_STEP_DETECTOR;
+        mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
         break;
     case SENSOR_TYPE_TEMPERATURE:
         mStringType = SENSOR_STRING_TYPE_TEMPERATURE;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_NON_WAKE_UP_PROXIMITY_SENSOR:
         mStringType = SENSOR_STRING_TYPE_NON_WAKE_UP_PROXIMITY_SENSOR;
+        mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
         break;
     case SENSOR_TYPE_WAKE_UP_ACCELEROMETER:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_ACCELEROMETER;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_MAGNETIC_FIELD:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_MAGNETIC_FIELD;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_ORIENTATION:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_ORIENTATION;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_GYROSCOPE:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_GYROSCOPE;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_LIGHT:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_LIGHT;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ON_CHANGE_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_PRESSURE:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_PRESSURE;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_GRAVITY:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_GRAVITY;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_LINEAR_ACCELERATION:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_LINEAR_ACCELERATION;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_ROTATION_VECTOR:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_ROTATION_VECTOR;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_RELATIVE_HUMIDITY:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_RELATIVE_HUMIDITY;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_SPECIAL_REPORTING_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_AMBIENT_TEMPERATURE:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_AMBIENT_TEMPERATURE;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ON_CHANGE_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_MAGNETIC_FIELD_UNCALIBRATED:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_MAGNETIC_FIELD_UNCALIBRATED;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_GAME_ROTATION_VECTOR:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_GAME_ROTATION_VECTOR;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_GYROSCOPE_UNCALIBRATED:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_GYROSCOPE_UNCALIBRATED;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_STEP_DETECTOR:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_STEP_DETECTOR;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_SPECIAL_REPORTING_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_STEP_COUNTER:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_STEP_COUNTER;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ON_CHANGE_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_GEOMAGNETIC_ROTATION_VECTOR:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_GEOMAGNETIC_ROTATION_VECTOR;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_CONTINUOUS_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_UP_HEART_RATE:
         mStringType = SENSOR_STRING_TYPE_WAKE_UP_HEART_RATE;
         mRequiredPermission = SENSOR_PERMISSION_BODY_SENSORS;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ON_CHANGE_MODE | SENSOR_FLAG_WAKE_UP);
+        break;
+    case SENSOR_TYPE_WAKE_UP_TILT_DETECTOR:
+        mStringType = SENSOR_STRING_TYPE_WAKE_UP_TILT_DETECTOR;
+        mFlags |= (SENSOR_FLAG_SPECIAL_REPORTING_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     case SENSOR_TYPE_WAKE_GESTURE:
         mStringType = SENSOR_STRING_TYPE_WAKE_GESTURE;
-        mWakeUpSensor = true;
+        mFlags |= (SENSOR_FLAG_ONE_SHOT_MODE | SENSOR_FLAG_WAKE_UP);
         break;
     default:
         // Only pipe the stringType, requiredPermission and flags for custom sensors.
@@ -234,8 +257,19 @@
         if (halVersion >= SENSORS_DEVICE_API_VERSION_1_2 && hwSensor->requiredPermission) {
             mRequiredPermission = hwSensor->requiredPermission;
         }
+
         if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
-            mWakeUpSensor = hwSensor->flags & SENSOR_FLAG_WAKE_UP;
+            mFlags = (int32_t) hwSensor->flags;
+        } else {
+            // This is an OEM defined sensor on an older HAL. Use minDelay to determine the
+            // reporting mode of the sensor.
+            if (mMinDelay > 0) {
+                mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
+            } else if (mMinDelay == 0) {
+                mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
+            } else if (mMinDelay < 0) {
+                mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
+            }
         }
         break;
     }
@@ -309,8 +343,16 @@
     return mMaxDelay;
 }
 
+int32_t Sensor::getFlags() const {
+    return mFlags;
+}
+
 bool Sensor::isWakeUpSensor() const {
-    return mWakeUpSensor;
+    return mFlags & SENSOR_FLAG_WAKE_UP;
+}
+
+int32_t Sensor::getReportingMode() const {
+    return ((mFlags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT);
 }
 
 size_t Sensor::getFlattenedSize() const
@@ -318,8 +360,7 @@
     size_t fixedSize =
             sizeof(int32_t) * 3 +
             sizeof(float) * 4 +
-            sizeof(int32_t) * 4 +
-            sizeof(bool) * 1;
+            sizeof(int32_t) * 5;
 
     size_t variableSize =
             sizeof(uint32_t) + FlattenableUtils::align<4>(mName.length()) +
@@ -350,7 +391,7 @@
     flattenString8(buffer, size, mStringType);
     flattenString8(buffer, size, mRequiredPermission);
     FlattenableUtils::write(buffer, size, mMaxDelay);
-    FlattenableUtils::write(buffer, size, mWakeUpSensor);
+    FlattenableUtils::write(buffer, size, mFlags);
     return NO_ERROR;
 }
 
@@ -365,8 +406,7 @@
     size_t fixedSize =
             sizeof(int32_t) * 3 +
             sizeof(float) * 4 +
-            sizeof(int32_t) * 4 +
-            sizeof(bool) * 1;
+            sizeof(int32_t) * 5;
     if (size < fixedSize) {
         return NO_MEMORY;
     }
@@ -389,7 +429,7 @@
         return NO_MEMORY;
     }
     FlattenableUtils::read(buffer, size, mMaxDelay);
-    FlattenableUtils::read(buffer, size, mWakeUpSensor);
+    FlattenableUtils::read(buffer, size, mFlags);
     return NO_ERROR;
 }
 
diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index 1bee04f..9d28792 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -223,14 +223,23 @@
                     s.getHandle(),
                     s.getRequiredPermission().string());
 
-            if (s.getMinDelay() > 0) {
-                result.appendFormat(
-                        "maxRate=%7.2fHz | ", 1e6f / s.getMinDelay());
+            const int reportingMode = s.getReportingMode();
+            if (reportingMode == AREPORTING_MODE_CONTINUOUS) {
+                result.append("continuous      |");
+            } else if (reportingMode == AREPORTING_MODE_ON_CHANGE) {
+                result.append("on-change       | ");
+            } else if (reportingMode == AREPORTING_MODE_ONE_SHOT) {
+                result.append("one-shot        | ");
             } else {
-                result.append(s.getMinDelay() == 0
-                        ? "on-demand         | "
-                        : "one-shot          | ");
+                result.append("special-trigger | ");
             }
+
+            if (s.getMinDelay() > 0) {
+                result.appendFormat("maxRate=%7.2fHz | ", 1e6f / s.getMinDelay());
+            } else {
+                result.appendFormat("minDelay=%5dus |", s.getMinDelay());
+            }
+
             if (s.getFifoMaxEventCount() > 0) {
                 result.appendFormat("FifoMax=%d events | ",
                         s.getFifoMaxEventCount());
@@ -301,17 +310,15 @@
 
 void SensorService::cleanupAutoDisabledSensorLocked(const sp<SensorEventConnection>& connection,
         sensors_event_t const* buffer, const int count) {
-    SensorInterface* sensor;
-    status_t err = NO_ERROR;
     for (int i=0 ; i<count ; i++) {
         int handle = buffer[i].sensor;
-        int type = buffer[i].type;
-        if (type == SENSOR_TYPE_SIGNIFICANT_MOTION) {
-            if (connection->hasSensor(handle)) {
-                sensor = mSensorMap.valueFor(handle);
-                if (sensor != NULL) {
-                    sensor->autoDisable(connection.get(), handle);
-                }
+        if (connection->hasSensor(handle)) {
+            SensorInterface* sensor = mSensorMap.valueFor(handle);
+            // If this buffer has an event from a one_shot sensor and this connection is registered
+            // for this particular one_shot sensor, try cleaning up the connection.
+            if (sensor != NULL &&
+                sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) {
+                sensor->autoDisable(connection.get(), handle);
                 cleanupWithoutDisableLocked(connection, handle);
             }
         }
@@ -588,7 +595,7 @@
             // this sensor is already activated, but we are adding a connection that uses it.
             // Immediately send down the last known value of the requested sensor if it's not a
             // "continuous" sensor.
-            if (sensor->getSensor().getMinDelay() == 0) {
+            if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ON_CHANGE) {
                 // NOTE: The wake_up flag of this event may get set to
                 // WAKE_UP_SENSOR_EVENT_NEEDS_ACK if this is a wake_up event.
                 sensors_event_t& event(mLastEventSeen.editValueFor(handle));
@@ -732,8 +739,8 @@
         return BAD_VALUE;
     }
 
-    if (sensor->getSensor().getType() == SENSOR_TYPE_SIGNIFICANT_MOTION) {
-        ALOGE("flush called on Significant Motion sensor");
+    if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) {
+        ALOGE("flush called on a one-shot sensor");
         return INVALID_OPERATION;
     }
     return sensor->flush(connection.get(), handle);