diff --git a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl
index dff3c4c..7e1aed7 100644
--- a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl
+++ b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl
@@ -38,4 +38,7 @@
   android.hardware.thermal.CoolingType type;
   String name;
   long value;
+  long powerLimitMw;
+  long powerMw;
+  long timeWindowMs;
 }
diff --git a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/ICoolingDeviceChangedCallback.aidl b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/ICoolingDeviceChangedCallback.aidl
new file mode 100644
index 0000000..ea75b1c
--- /dev/null
+++ b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/ICoolingDeviceChangedCallback.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.thermal;
+/* @hide */
+@VintfStability
+interface ICoolingDeviceChangedCallback {
+  oneway void notifyCoolingDeviceChanged(in android.hardware.thermal.CoolingDevice coolingDevice);
+}
diff --git a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/IThermal.aidl b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/IThermal.aidl
index c9b6cab..904496c 100644
--- a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/IThermal.aidl
+++ b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/IThermal.aidl
@@ -44,4 +44,6 @@
   void registerThermalChangedCallback(in android.hardware.thermal.IThermalChangedCallback callback);
   void registerThermalChangedCallbackWithType(in android.hardware.thermal.IThermalChangedCallback callback, in android.hardware.thermal.TemperatureType type);
   void unregisterThermalChangedCallback(in android.hardware.thermal.IThermalChangedCallback callback);
+  void registerCoolingDeviceChangedCallbackWithType(in android.hardware.thermal.ICoolingDeviceChangedCallback callback, in android.hardware.thermal.CoolingType type);
+  void unregisterCoolingDeviceChangedCallback(in android.hardware.thermal.ICoolingDeviceChangedCallback callback);
 }
diff --git a/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl b/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl
index 0c5c17d..406733b 100644
--- a/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl
+++ b/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl
@@ -40,4 +40,16 @@
      * means deeper throttling.
      */
     long value;
+    /**
+     * Power budget (mW) of the cooling device.
+     */
+    long powerLimitMw;
+    /**
+     * Target cooling device's AVG power for the last time_window_ms.
+     */
+    long powerMw;
+    /**
+     * The time window (millisecond) to calculate the power consumption
+     */
+    long timeWindowMs;
 }
diff --git a/thermal/aidl/android/hardware/thermal/ICoolingDeviceChangedCallback.aidl b/thermal/aidl/android/hardware/thermal/ICoolingDeviceChangedCallback.aidl
new file mode 100644
index 0000000..e6bb9fe
--- /dev/null
+++ b/thermal/aidl/android/hardware/thermal/ICoolingDeviceChangedCallback.aidl
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+package android.hardware.thermal;
+
+import android.hardware.thermal.CoolingDevice;
+import android.hardware.thermal.Temperature;
+
+/**
+ * ICoolingDeviceChangedCallback send cooling device change notification to clients.
+ * @hide
+ */
+@VintfStability
+interface ICoolingDeviceChangedCallback {
+    /**
+     * Send a cooling device change event to all ThermalHAL
+     * cooling device event listeners.
+     *
+     * @param cooling_device The cooling device information associated with the
+     *     change event.
+     */
+    oneway void notifyCoolingDeviceChanged(in CoolingDevice coolingDevice);
+}
diff --git a/thermal/aidl/android/hardware/thermal/IThermal.aidl b/thermal/aidl/android/hardware/thermal/IThermal.aidl
index c94edcd..4aa4090 100644
--- a/thermal/aidl/android/hardware/thermal/IThermal.aidl
+++ b/thermal/aidl/android/hardware/thermal/IThermal.aidl
@@ -18,6 +18,7 @@
 
 import android.hardware.thermal.CoolingDevice;
 import android.hardware.thermal.CoolingType;
+import android.hardware.thermal.ICoolingDeviceChangedCallback;
 import android.hardware.thermal.IThermalChangedCallback;
 import android.hardware.thermal.Temperature;
 import android.hardware.thermal.TemperatureThreshold;
@@ -188,4 +189,40 @@
      *         getMessage() must be populated with human-readable error message.
      */
     void unregisterThermalChangedCallback(in IThermalChangedCallback callback);
+
+    /**
+     * Register an ICoolingDeviceChangedCallback for a given CoolingType, used by
+     * the Thermal HAL to receive CDEV events when cooling device status
+     * changed.
+     * Multiple registrations with different ICoolingDeviceChangedCallback must be allowed.
+     * Multiple registrations with same ICoolingDeviceChangedCallback is not allowed, client
+     * should unregister the given ICoolingDeviceChangedCallback first.
+     *
+     * @param callback the ICoolingChangedCallback to use for receiving
+     *    cooling device events. If nullptr callback is given, the status code will be
+     *    STATUS_BAD_VALUE and the operation will fail.
+     * @param type the type to be filtered.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT If the callback is given nullptr or already registered. And the
+     *         getMessage() must be populated with human-readable error message.
+     * @throws EX_ILLEGAL_STATE If the Thermal HAL is not initialized successfully. And the
+     *         getMessage() must be populated with human-readable error message.
+     */
+    void registerCoolingDeviceChangedCallbackWithType(
+            in ICoolingDeviceChangedCallback callback, in CoolingType type);
+
+    /**
+     * Unregister an ICoolingDeviceChangedCallback, used by the Thermal HAL
+     * to receive CDEV events when cooling device status changed.
+     *
+     * @param callback the ICoolingDeviceChangedCallback to use for receiving
+     *    cooling device events. if nullptr callback is given, the status code will be
+     *    STATUS_BAD_VALUE and the operation will fail.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT If the callback is given nullptr or not previously registered.
+     *         And the getMessage() must be populated with human-readable error message.
+     * @throws EX_ILLEGAL_STATE If the Thermal HAL is not initialized successfully. And the
+     *         getMessage() must be populated with human-readable error message.
+     */
+    void unregisterCoolingDeviceChangedCallback(in ICoolingDeviceChangedCallback callback);
 }
diff --git a/thermal/aidl/default/Thermal.cpp b/thermal/aidl/default/Thermal.cpp
index f643d22..41d0be8 100644
--- a/thermal/aidl/default/Thermal.cpp
+++ b/thermal/aidl/default/Thermal.cpp
@@ -142,4 +142,53 @@
     return ScopedAStatus::ok();
 }
 
+ScopedAStatus Thermal::registerCoolingDeviceChangedCallbackWithType(
+        const std::shared_ptr<ICoolingDeviceChangedCallback>& in_callback, CoolingType in_type) {
+    LOG(VERBOSE) << __func__ << " ICoolingDeviceChangedCallback: " << in_callback
+                 << ", CoolingType: " << static_cast<int32_t>(in_type);
+    if (in_callback == nullptr) {
+        return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                "Invalid nullptr callback");
+    }
+    {
+        std::lock_guard<std::mutex> _lock(cdev_callback_mutex_);
+        if (std::any_of(cdev_callbacks_.begin(), cdev_callbacks_.end(),
+                        [&](const std::shared_ptr<ICoolingDeviceChangedCallback>& c) {
+                            return interfacesEqual(c, in_callback);
+                        })) {
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "Callback already registered");
+        }
+        cdev_callbacks_.push_back(in_callback);
+    }
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Thermal::unregisterCoolingDeviceChangedCallback(
+        const std::shared_ptr<ICoolingDeviceChangedCallback>& in_callback) {
+    LOG(VERBOSE) << __func__ << " ICoolingDeviceChangedCallback: " << in_callback;
+    if (in_callback == nullptr) {
+        return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                "Invalid nullptr callback");
+    }
+    {
+        std::lock_guard<std::mutex> _lock(cdev_callback_mutex_);
+        bool removed = false;
+        cdev_callbacks_.erase(
+                std::remove_if(cdev_callbacks_.begin(), cdev_callbacks_.end(),
+                               [&](const std::shared_ptr<ICoolingDeviceChangedCallback>& c) {
+                                   if (interfacesEqual(c, in_callback)) {
+                                       removed = true;
+                                       return true;
+                                   }
+                                   return false;
+                               }),
+                cdev_callbacks_.end());
+        if (!removed) {
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "Callback wasn't registered");
+        }
+    }
+    return ScopedAStatus::ok();
+}
 }  // namespace aidl::android::hardware::thermal::impl::example
diff --git a/thermal/aidl/default/Thermal.h b/thermal/aidl/default/Thermal.h
index 8885e63..d3d8874 100644
--- a/thermal/aidl/default/Thermal.h
+++ b/thermal/aidl/default/Thermal.h
@@ -46,6 +46,7 @@
 
     ndk::ScopedAStatus registerThermalChangedCallback(
             const std::shared_ptr<IThermalChangedCallback>& in_callback) override;
+
     ndk::ScopedAStatus registerThermalChangedCallbackWithType(
             const std::shared_ptr<IThermalChangedCallback>& in_callback,
             TemperatureType in_type) override;
@@ -53,9 +54,18 @@
     ndk::ScopedAStatus unregisterThermalChangedCallback(
             const std::shared_ptr<IThermalChangedCallback>& in_callback) override;
 
+    ndk::ScopedAStatus registerCoolingDeviceChangedCallbackWithType(
+            const std::shared_ptr<ICoolingDeviceChangedCallback>& in_callback,
+            CoolingType in_type) override;
+
+    ndk::ScopedAStatus unregisterCoolingDeviceChangedCallback(
+            const std::shared_ptr<ICoolingDeviceChangedCallback>& in_callback) override;
+
   private:
     std::mutex thermal_callback_mutex_;
     std::vector<std::shared_ptr<IThermalChangedCallback>> thermal_callbacks_;
+    std::mutex cdev_callback_mutex_;
+    std::vector<std::shared_ptr<ICoolingDeviceChangedCallback>> cdev_callbacks_;
 };
 
 }  // namespace example
diff --git a/thermal/aidl/vts/VtsHalThermalTargetTest.cpp b/thermal/aidl/vts/VtsHalThermalTargetTest.cpp
index 4b0eb65..403c6c8 100644
--- a/thermal/aidl/vts/VtsHalThermalTargetTest.cpp
+++ b/thermal/aidl/vts/VtsHalThermalTargetTest.cpp
@@ -26,6 +26,7 @@
 
 #include <aidl/Gtest.h>
 #include <aidl/Vintf.h>
+#include <aidl/android/hardware/thermal/BnCoolingDeviceChangedCallback.h>
 #include <aidl/android/hardware/thermal/BnThermal.h>
 #include <aidl/android/hardware/thermal/BnThermalChangedCallback.h>
 #include <android-base/logging.h>
@@ -59,6 +60,15 @@
         .throttlingStatus = ThrottlingSeverity::CRITICAL,
 };
 
+static const CoolingDevice kCoolingDevice = {
+        .type = CoolingType::CPU,
+        .name = "test cooling device",
+        .value = 1,
+        .powerLimitMw = 300,
+        .powerMw = 500,
+        .timeWindowMs = 7000,
+};
+
 // Callback class for receiving thermal event notifications from main class
 class ThermalCallback : public BnThermalChangedCallback {
   public:
@@ -85,6 +95,33 @@
     bool mInvoke = false;
 };
 
+// Callback class for receiving cooling device event notifications from main class
+class CoolingDeviceCallback : public BnCoolingDeviceChangedCallback {
+  public:
+    ndk::ScopedAStatus notifyCoolingDeviceChanged(const CoolingDevice&) override {
+        {
+            std::lock_guard<std::mutex> lock(mMutex);
+            mInvoke = true;
+        }
+        mNotifyCoolingDeviceChanged.notify_all();
+        return ndk::ScopedAStatus::ok();
+    }
+
+    template <typename R, typename P>
+    [[nodiscard]] bool waitForCallback(std::chrono::duration<R, P> duration) {
+        std::unique_lock<std::mutex> lock(mMutex);
+        bool r = mNotifyCoolingDeviceChanged.wait_for(lock, duration,
+                                                      [this] { return this->mInvoke; });
+        mInvoke = false;
+        return r;
+    }
+
+  private:
+    std::mutex mMutex;
+    std::condition_variable mNotifyCoolingDeviceChanged;
+    bool mInvoke = false;
+};
+
 // The main test class for THERMAL HIDL HAL.
 class ThermalAidlTest : public testing::TestWithParam<std::string> {
   public:
@@ -97,19 +134,42 @@
         ASSERT_NE(mThermalCallback, nullptr);
         ::ndk::ScopedAStatus status = mThermal->registerThermalChangedCallback(mThermalCallback);
         ASSERT_TRUE(status.isOk()) << status.getMessage();
+
+        auto ret = mThermal->getInterfaceVersion(&thermal_version);
+        ASSERT_TRUE(ret.isOk()) << ret;
+        if (thermal_version > 1) {
+            mCoolingDeviceCallback = ndk::SharedRefBase::make<CoolingDeviceCallback>();
+            ASSERT_NE(mCoolingDeviceCallback, nullptr);
+            status = mThermal->registerCoolingDeviceChangedCallbackWithType(mCoolingDeviceCallback,
+                                                                            kCoolingDevice.type);
+            ASSERT_TRUE(status.isOk()) << status.getMessage();
+        }
     }
 
     void TearDown() override {
         ::ndk::ScopedAStatus status = mThermal->unregisterThermalChangedCallback(mThermalCallback);
         ASSERT_TRUE(status.isOk()) << status.getMessage();
+
         // Expect to fail if unregister again
         status = mThermal->unregisterThermalChangedCallback(mThermalCallback);
         ASSERT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+
+        auto ret = mThermal->getInterfaceVersion(&thermal_version);
+        ASSERT_TRUE(ret.isOk()) << ret;
+        if (thermal_version > 1) {
+            status = mThermal->unregisterCoolingDeviceChangedCallback(mCoolingDeviceCallback);
+            ASSERT_TRUE(status.isOk()) << status.getMessage();
+            status = mThermal->unregisterCoolingDeviceChangedCallback(mCoolingDeviceCallback);
+            ASSERT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+        }
     }
+    // Stores thermal version
+    int32_t thermal_version;
 
   protected:
     std::shared_ptr<IThermal> mThermal;
     std::shared_ptr<ThermalCallback> mThermalCallback;
+    std::shared_ptr<CoolingDeviceCallback> mCoolingDeviceCallback;
 };
 
 // Test ThermalChangedCallback::notifyThrottling().
@@ -121,6 +181,21 @@
     ASSERT_TRUE(thermalCallback->waitForCallback(200ms));
 }
 
+// Test CoolingDeviceChangedCallback::notifyCoolingDeviceChanged().
+// This just calls into and back from our local CoolingDeviceChangedCallback impl.
+TEST_P(ThermalAidlTest, NotifyCoolingDeviceChangedTest) {
+    auto ret = mThermal->getInterfaceVersion(&thermal_version);
+    ASSERT_TRUE(ret.isOk()) << ret;
+    if (thermal_version < 2) {
+        return;
+    }
+    std::shared_ptr<CoolingDeviceCallback> cdevCallback =
+            ndk::SharedRefBase::make<CoolingDeviceCallback>();
+    ::ndk::ScopedAStatus status = cdevCallback->notifyCoolingDeviceChanged(kCoolingDevice);
+    ASSERT_TRUE(status.isOk()) << status.getMessage();
+    ASSERT_TRUE(cdevCallback->waitForCallback(200ms));
+}
+
 // Test Thermal->registerThermalChangedCallback.
 TEST_P(ThermalAidlTest, RegisterThermalChangedCallbackTest) {
     // Expect to fail with same callback
@@ -169,6 +244,37 @@
         || status.getExceptionCode() == EX_NULL_POINTER);
 }
 
+// Test Thermal->registerCoolingDeviceChangedCallbackWithType.
+TEST_P(ThermalAidlTest, RegisterCoolingDeviceChangedCallbackWithTypeTest) {
+    auto ret = mThermal->getInterfaceVersion(&thermal_version);
+    ASSERT_TRUE(ret.isOk()) << ret;
+    if (thermal_version < 2) {
+        return;
+    }
+
+    // Expect to fail with same callback
+    ::ndk::ScopedAStatus status = mThermal->registerCoolingDeviceChangedCallbackWithType(
+            mCoolingDeviceCallback, CoolingType::CPU);
+    ASSERT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+    // Expect to fail with null callback
+    status = mThermal->registerCoolingDeviceChangedCallbackWithType(nullptr, CoolingType::CPU);
+    ASSERT_TRUE(status.getExceptionCode() == EX_ILLEGAL_ARGUMENT ||
+                status.getExceptionCode() == EX_NULL_POINTER);
+    std::shared_ptr<CoolingDeviceCallback> localCoolingDeviceCallback =
+            ndk::SharedRefBase::make<CoolingDeviceCallback>();
+    // Expect to succeed with different callback
+    status = mThermal->registerCoolingDeviceChangedCallbackWithType(localCoolingDeviceCallback,
+                                                                    CoolingType::CPU);
+    ASSERT_TRUE(status.isOk()) << status.getMessage();
+    // Remove the local callback
+    status = mThermal->unregisterCoolingDeviceChangedCallback(localCoolingDeviceCallback);
+    ASSERT_TRUE(status.isOk()) << status.getMessage();
+    // Expect to fail with null callback
+    status = mThermal->unregisterCoolingDeviceChangedCallback(nullptr);
+    ASSERT_TRUE(status.getExceptionCode() == EX_ILLEGAL_ARGUMENT ||
+                status.getExceptionCode() == EX_NULL_POINTER);
+}
+
 // Test Thermal->getCurrentTemperatures().
 TEST_P(ThermalAidlTest, TemperatureTest) {
     std::vector<Temperature> ret;