Add overriding methods for the base interface definition

Defines the functions that override the default setter for
the led state property.

Change-Id: Ic3a8d43cc783003c43f53df8f7e90d7fc4d6715a
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/physical.cpp b/physical.cpp
new file mode 100644
index 0000000..31fc1ee
--- /dev/null
+++ b/physical.cpp
@@ -0,0 +1,58 @@
+/**
+ * Copyright © 2016 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 <iostream>
+#include <string>
+#include "physical.hpp"
+namespace phosphor
+{
+namespace led
+{
+
+/** @brief Populates key parameters */
+void Physical::setInitialState()
+{
+    // 1. read /sys/class/leds/name/trigger
+    // 2. If its 'timer', then its blinking.
+    //    2.1: On blink, use delay_on and delay_off into dutyOn
+    // 3. If its 'none', then read brightness. 255 means, its ON, else OFF.
+    // Implementation in the next patchset.
+}
+
+/** @brief Overloaded State Property Setter function */
+auto Physical::state(Action value) -> Action
+{
+    // Set the base class's state to actuals since the getter
+    // operation is handled there.
+    auto action = sdbusplus::xyz::openbmc_project::Led::server
+                                   ::Physical::state(value);
+
+    // Apply the action.
+    driveLED();
+
+    return action;
+}
+
+/** @brief apply action on the LED */
+void Physical::driveLED()
+{
+    // Replace with actual code.
+    std::cout << " Drive LED  STUB :: \n";
+    return;
+}
+
+} // namespace led
+} // namespace phosphor