diff --git a/phosphor-regulators/src/journal.cpp b/phosphor-regulators/src/journal.cpp
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+++ b/phosphor-regulators/src/journal.cpp
@@ -0,0 +1,150 @@
+
+/**
+ * Copyright © 2020 IBM Corporation
+ *
+ * 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.
+ */
+
+#include "journal.hpp"
+
+#include <string.h>
+#include <time.h>
+
+#include <cstdint>
+#include <ctime>
+#include <stdexcept>
+
+using namespace phosphor::logging;
+
+namespace phosphor::power::regulators
+{
+
+class JournalCloser
+{
+  public:
+    JournalCloser() = delete;
+    JournalCloser(const JournalCloser&) = delete;
+    JournalCloser(JournalCloser&&) = delete;
+    JournalCloser& operator=(const JournalCloser&) = delete;
+    JournalCloser& operator=(JournalCloser&&) = delete;
+
+    JournalCloser(sd_journal* journal) : journal{journal}
+    {
+    }
+    ~JournalCloser()
+    {
+        sd_journal_close(journal);
+    }
+
+  private:
+    sd_journal* journal{nullptr};
+};
+
+std::string SystemdJournal::getFieldValue(sd_journal* journal,
+                                          const char* field) const
+{
+    const char* data{nullptr};
+    size_t length{0};
+
+    // Get field data
+    int rc = sd_journal_get_data(journal, field, (const void**)&data, &length);
+    if (rc < 0)
+    {
+        throw std::runtime_error{
+            std::string{"Failed to read journal entry field: "} +
+            strerror(-rc)};
+    }
+
+    // Get field value
+    size_t prefix{0};
+    const void* eq = memchr(data, '=', length);
+    if (eq)
+    {
+        prefix = (const char*)eq - data + 1;
+    }
+    else
+    {
+        prefix = 0;
+    }
+
+    std::string value{data + prefix, length - prefix};
+
+    return value;
+}
+
+std::vector<std::string>
+    SystemdJournal::getMessages(const std::string& field,
+                                const std::string& fieldValue, unsigned int max)
+{
+    sd_journal* journal;
+    std::vector<std::string> messages;
+
+    int rc = sd_journal_open(&journal, SD_JOURNAL_LOCAL_ONLY);
+    if (rc < 0)
+    {
+        throw std::runtime_error{std::string{"Failed to open journal: "} +
+                                 strerror(-rc)};
+    }
+
+    JournalCloser closer{journal};
+
+    SD_JOURNAL_FOREACH_BACKWARDS(journal)
+    {
+        // Get input field
+        std::string value = getFieldValue(journal, field.c_str());
+
+        // Compare field value and read data
+        if (value == fieldValue)
+        {
+            // Get SYSLOG_IDENTIFIER field
+            std::string syslog = getFieldValue(journal, "SYSLOG_IDENTIFIER");
+
+            // Get _PID field
+            std::string pid = getFieldValue(journal, "_PID");
+
+            // Get MESSAGE field
+            std::string message = getFieldValue(journal, "MESSAGE");
+
+            // Get realtime
+            uint64_t usec{0};
+            rc = sd_journal_get_realtime_usec(journal, &usec);
+            if (rc < 0)
+            {
+                throw std::runtime_error{
+                    std::string{"Failed to get journal entry timestamp: "} +
+                    strerror(-rc)};
+            }
+
+            // Convert realtime microseconds to date format
+            char dateBuffer[80];
+            std::string date;
+            std::time_t timeInSecs = usec / 1000000;
+            strftime(dateBuffer, sizeof(dateBuffer), "%b %d %H:%M:%S",
+                     std::localtime(&timeInSecs));
+            date = dateBuffer;
+
+            // Store value to messages
+            value = date + " " + syslog + "[" + pid + "]: " + message;
+            messages.insert(messages.begin(), value);
+        }
+        // Set the maximum number of messages
+        if ((max != 0) && (messages.size() >= max))
+        {
+            break;
+        }
+    }
+
+    return messages;
+}
+
+} // namespace phosphor::power::regulators
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