diff --git a/powerstats/DvfsStateResidencyDataProvider.cpp b/powerstats/DvfsStateResidencyDataProvider.cpp
new file mode 100644
index 0000000..95289bd
--- /dev/null
+++ b/powerstats/DvfsStateResidencyDataProvider.cpp
@@ -0,0 +1,158 @@
+/*
+ * 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.
+ */
+#define LOG_TAG "libpixelpowerstats"
+
+#include "DvfsStateResidencyDataProvider.h"
+
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/strings.h>
+
+#include <string>
+#include <utility>
+
+using android::base::ParseUint;
+using android::base::Split;
+using android::base::StartsWith;
+using android::base::Trim;
+
+namespace android {
+namespace hardware {
+namespace google {
+namespace pixel {
+namespace powerstats {
+
+DvfsStateResidencyDataProvider::DvfsStateResidencyDataProvider(std::string path, uint64_t clockRate)
+    : mPath(std::move(path)), mClockRate(clockRate) {}
+
+void DvfsStateResidencyDataProvider::addEntity(
+        uint32_t id, std::string name, std::vector<std::pair<std::string, std::string>> states) {
+    mPowerEntities.push_back({id, name, states});
+}
+
+int32_t DvfsStateResidencyDataProvider::matchEntity(char *line) {
+    for (auto const &entity : mPowerEntities) {
+        if (entity.powerEntityName == Trim(std::string(line))) {
+            return entity.powerEntityId;
+        }
+    }
+    return -1;
+}
+
+int32_t DvfsStateResidencyDataProvider::matchState(char *line, int32_t entityId) {
+    uint32_t stateId = 0;
+    for (auto const &entity : mPowerEntities) {
+        if (entityId == entity.powerEntityId) {
+            for (auto const &state : entity.states) {
+                if (StartsWith(Trim(std::string(line)), state.second)) {
+                    return stateId;
+                }
+                stateId++;
+            }
+            return -1;
+        }
+    }
+    return -1;
+}
+
+bool DvfsStateResidencyDataProvider::parseState(char *line, uint64_t &duration, uint64_t &count) {
+    std::vector<std::string> parts = Split(line, " ");
+    if (parts.size() != 7) {
+        return false;
+    }
+    if (!ParseUint(Trim(parts[3]), &count)) {
+        return false;
+    }
+    if (!ParseUint(Trim(parts[6]), &duration)) {
+        return false;
+    }
+    return true;
+}
+
+bool DvfsStateResidencyDataProvider::getResults(
+        std::unordered_map<uint32_t, PowerEntityStateResidencyResult> &results) {
+    std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(mPath.c_str(), "r"), fclose);
+    if (!fp) {
+        PLOG(ERROR) << __func__ << ":Failed to open file " << mPath
+                    << " Error = " << strerror(errno);
+        return false;
+    }
+
+    for (auto const &stateSpace : getStateSpaces()) {
+        PowerEntityStateResidencyResult result = {.powerEntityId = stateSpace.powerEntityId};
+        result.stateResidencyData.resize(stateSpace.states.size());
+        for (uint32_t i = 0; i < result.stateResidencyData.size(); i++) {
+            result.stateResidencyData[i].powerEntityStateId =
+                    stateSpace.states[i].powerEntityStateId;
+        }
+        results.insert(std::make_pair(stateSpace.powerEntityId, result));
+    }
+
+    size_t len = 0;
+    char *line = nullptr;
+
+    int32_t temp = -1, entityId = -1, stateId = -1;
+    uint64_t duration, count;
+
+    while (getline(&line, &len, fp.get()) != -1) {
+        temp = matchEntity(line);
+        // Assign entityId only when a new valid entity is encountered.
+        if (temp >= 0) {
+            entityId = temp;
+        }
+        if (entityId >= 0) {
+            stateId = matchState(line, entityId);
+            if (stateId >= 0) {
+                if (parseState(line, duration, count)) {
+                    results[entityId].stateResidencyData[stateId].totalTimeInStateMs =
+                            duration / mClockRate;
+                    results[entityId].stateResidencyData[stateId].totalStateEntryCount = count;
+                } else {
+                    LOG(ERROR) << "Failed to parse duration and count from [" << std::string(line)
+                               << "]";
+                    return false;
+                }
+            }
+        }
+    }
+
+    free(line);
+
+    return true;
+}
+
+std::vector<PowerEntityStateSpace> DvfsStateResidencyDataProvider::getStateSpaces() {
+    std::vector<PowerEntityStateSpace> stateSpaces;
+    stateSpaces.reserve(mPowerEntities.size());
+    for (auto const &entity : mPowerEntities) {
+        PowerEntityStateSpace s = {.powerEntityId = entity.powerEntityId};
+        s.states.resize(entity.states.size());
+        uint32_t stateId = 0;
+        for (auto const &state : entity.states) {
+            s.states[stateId] = {.powerEntityStateId = stateId,
+                                 .powerEntityStateName = state.first};
+            stateId++;
+        }
+        stateSpaces.emplace_back(s);
+    }
+    return stateSpaces;
+}
+
+}  // namespace powerstats
+}  // namespace pixel
+}  // namespace google
+}  // namespace hardware
+}  // namespace android