diff --git a/power-supply/power_supply.cpp b/power-supply/power_supply.cpp
index 62067ef..981435f 100644
--- a/power-supply/power_supply.cpp
+++ b/power-supply/power_supply.cpp
@@ -21,6 +21,7 @@
 #include "gpio.hpp"
 #include "names_values.hpp"
 #include "pmbus.hpp"
+#include "types.hpp"
 #include "utility.hpp"
 
 #include <functional>
@@ -41,25 +42,6 @@
 using namespace sdbusplus::xyz::openbmc_project::Common::Device::Error;
 namespace version = sdbusplus::xyz::openbmc_project::Software::server;
 
-constexpr auto ASSOCIATION_IFACE = "xyz.openbmc_project.Association";
-constexpr auto LOGGING_IFACE = "xyz.openbmc_project.Logging.Entry";
-constexpr auto INVENTORY_IFACE = "xyz.openbmc_project.Inventory.Item";
-constexpr auto POWER_IFACE = "org.openbmc.control.Power";
-constexpr auto INVENTORY_MGR_IFACE = "xyz.openbmc_project.Inventory.Manager";
-constexpr auto ASSET_IFACE = "xyz.openbmc_project.Inventory.Decorator.Asset";
-constexpr auto VERSION_IFACE = "xyz.openbmc_project.Software.Version";
-
-constexpr auto ENDPOINTS_PROP = "endpoints";
-constexpr auto MESSAGE_PROP = "Message";
-constexpr auto RESOLVED_PROP = "Resolved";
-constexpr auto PRESENT_PROP = "Present";
-constexpr auto VERSION_PURPOSE_PROP = "Purpose";
-
-constexpr auto INVENTORY_OBJ_PATH = "/xyz/openbmc_project/inventory";
-constexpr auto POWER_OBJ_PATH = "/org/openbmc/control/power0";
-
-constexpr auto INPUT_HISTORY = "input_history";
-
 PowerSupply::PowerSupply(const std::string& name, size_t inst,
                          const std::string& objpath, const std::string& invpath,
                          sdbusplus::bus::bus& bus, const sdeventplus::Event& e,
@@ -261,31 +243,7 @@
 
 void PowerSupply::updatePowerState()
 {
-    // When state = 1, system is powered on
-    int32_t state = 0;
-
-    try
-    {
-        auto service = util::getService(POWER_OBJ_PATH, POWER_IFACE, bus);
-
-        // Use getProperty utility function to get power state.
-        util::getProperty<int32_t>(POWER_IFACE, "state", POWER_OBJ_PATH,
-                                   service, bus, state);
-
-        if (state)
-        {
-            powerOn = true;
-        }
-        else
-        {
-            powerOn = false;
-        }
-    }
-    catch (std::exception& e)
-    {
-        log<level::INFO>("Failed to get power state. Assuming it is off.");
-        powerOn = false;
-    }
+    powerOn = util::isPoweredOn(bus);
 }
 
 void PowerSupply::checkInputFault(const uint16_t statusWord)
diff --git a/tools/power-utils/updater.cpp b/tools/power-utils/updater.cpp
index 41aa3eb..024fabc 100644
--- a/tools/power-utils/updater.cpp
+++ b/tools/power-utils/updater.cpp
@@ -17,6 +17,7 @@
 
 #include "updater.hpp"
 
+#include "types.hpp"
 #include "utility.hpp"
 
 #include <fstream>
@@ -28,9 +29,6 @@
 namespace updater
 {
 
-constexpr auto INVENTORY_IFACE = "xyz.openbmc_project.Inventory.Item";
-constexpr auto PRESENT_PROP = "Present";
-
 namespace internal
 {
 
diff --git a/types.hpp b/types.hpp
new file mode 100644
index 0000000..90b5c6a
--- /dev/null
+++ b/types.hpp
@@ -0,0 +1,22 @@
+#pragma once
+
+/* const expressions shared in this repository */
+
+constexpr auto ASSOCIATION_IFACE = "xyz.openbmc_project.Association";
+constexpr auto LOGGING_IFACE = "xyz.openbmc_project.Logging.Entry";
+constexpr auto INVENTORY_IFACE = "xyz.openbmc_project.Inventory.Item";
+constexpr auto POWER_IFACE = "org.openbmc.control.Power";
+constexpr auto INVENTORY_MGR_IFACE = "xyz.openbmc_project.Inventory.Manager";
+constexpr auto ASSET_IFACE = "xyz.openbmc_project.Inventory.Decorator.Asset";
+constexpr auto VERSION_IFACE = "xyz.openbmc_project.Software.Version";
+
+constexpr auto ENDPOINTS_PROP = "endpoints";
+constexpr auto MESSAGE_PROP = "Message";
+constexpr auto RESOLVED_PROP = "Resolved";
+constexpr auto PRESENT_PROP = "Present";
+constexpr auto VERSION_PURPOSE_PROP = "Purpose";
+
+constexpr auto INVENTORY_OBJ_PATH = "/xyz/openbmc_project/inventory";
+constexpr auto POWER_OBJ_PATH = "/org/openbmc/control/power0";
+
+constexpr auto INPUT_HISTORY = "input_history";
diff --git a/utility.cpp b/utility.cpp
index bd84249..680b89e 100644
--- a/utility.cpp
+++ b/utility.cpp
@@ -15,6 +15,8 @@
  */
 #include "utility.hpp"
 
+#include "types.hpp"
+
 #include <fstream>
 
 namespace phosphor
@@ -103,6 +105,24 @@
     return type;
 }
 
+bool isPoweredOn(sdbusplus::bus::bus& bus)
+{
+    // When state = 1, system is powered on
+    int32_t state = 0;
+
+    try
+    {
+        auto service = util::getService(POWER_OBJ_PATH, POWER_IFACE, bus);
+        getProperty<int32_t>(POWER_IFACE, "state", POWER_OBJ_PATH, service, bus,
+                             state);
+    }
+    catch (std::exception& e)
+    {
+        log<level::INFO>("Failed to get power state. Assuming it is off.");
+    }
+    return state != 0;
+}
+
 } // namespace util
 } // namespace power
 } // namespace phosphor
diff --git a/utility.hpp b/utility.hpp
index f6c40d8..ffc489c 100644
--- a/utility.hpp
+++ b/utility.hpp
@@ -125,6 +125,13 @@
  */
 phosphor::pmbus::Type getPMBusAccessType(const nlohmann::json& json);
 
+/**
+ * Check if power is on
+ *
+ * @return true if power is on, otherwise false
+ */
+bool isPoweredOn(sdbusplus::bus::bus& bus);
+
 } // namespace util
 } // namespace power
 } // namespace phosphor