diff --git a/powerstats/DvfsStateResidencyDataProvider.h b/powerstats/DvfsStateResidencyDataProvider.h
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+++ b/powerstats/DvfsStateResidencyDataProvider.h
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+/*
+ * Copyright (C) 2020 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.
+ */
+#ifndef HARDWARE_GOOGLE_PIXEL_POWERSTATS_DVFSSTATERESIDENCYDATAPROVIDER_H
+#define HARDWARE_GOOGLE_PIXEL_POWERSTATS_DVFSSTATERESIDENCYDATAPROVIDER_H
+
+#include <pixelpowerstats/PowerStats.h>
+
+namespace android {
+namespace hardware {
+namespace google {
+namespace pixel {
+namespace powerstats {
+
+class DvfsStateResidencyDataProvider : public IStateResidencyDataProvider {
+  public:
+    /*
+     * path - path to dvfs sysfs node.
+     * clockRate - clock rate in KHz.
+     */
+    DvfsStateResidencyDataProvider(std::string path, uint64_t clockRate);
+    ~DvfsStateResidencyDataProvider() = default;
+
+    /*
+     * id - the power entity id
+     * name - the power entity name to parse from sysfs node
+     * frequencies - list of pairs (frequency display name, frequency in sysfs
+     *               node).
+     */
+    void addEntity(uint32_t id, std::string name,
+                   std::vector<std::pair<std::string, std::string>> frequencies);
+
+    /*
+     * See IStateResidencyDataProvider::getResults.
+     */
+    bool getResults(
+            std::unordered_map<uint32_t, PowerEntityStateResidencyResult> &results) override;
+
+    /*
+     * See IStateResidencyDataProvider::getStateSpaces.
+     */
+    std::vector<PowerEntityStateSpace> getStateSpaces() override;
+
+  private:
+    int32_t matchEntity(char *line);
+    int32_t matchState(char *line, int32_t entityId);
+    bool parseState(char *line, uint64_t &duration, uint64_t &count);
+
+    const std::string mPath;
+    const uint64_t mClockRate;
+
+    struct config {
+        // Power entity id.
+        uint32_t powerEntityId;
+
+        // Power entity name to parse.
+        std::string powerEntityName;
+
+        // List of state pairs (name to display, name to parse).
+        std::vector<std::pair<std::string, std::string>> states;
+    };
+    std::vector<config> mPowerEntities;
+};
+
+}  // namespace powerstats
+}  // namespace pixel
+}  // namespace google
+}  // namespace hardware
+}  // namespace android
+
+#endif  // HARDWARE_GOOGLE_PIXEL_POWERSTATS_DVFSSTATERESIDENCYDATAPROVIDER_H