diff --git a/src/hostSelector_switch.cpp b/src/hostSelector_switch.cpp
new file mode 100644
index 0000000..c3ad83f
--- /dev/null
+++ b/src/hostSelector_switch.cpp
@@ -0,0 +1,133 @@
+
+#include "hostSelector_switch.hpp"
+
+// add the button iface class to registry
+static ButtonIFRegister<HostSelector> buttonRegister;
+using namespace phosphor::logging;
+size_t HostSelector::getMappedHSConfig(size_t hsPosition)
+{
+    size_t adjustedPosition = INVALID_INDEX; // set bmc as default value
+    std::string hsPosStr;
+    hsPosStr = std::to_string(hsPosition);
+
+    if (hsPosMap.find(hsPosStr) != hsPosMap.end())
+    {
+        adjustedPosition = hsPosMap[hsPosStr];
+    }
+    else
+    {
+        log<level::DEBUG>(
+            "getMappedHSConfig : no valid value in map.",
+            entry("FORM_FACTOR_TYPE=%s", (getFormFactorType()).c_str()));
+    }
+    return adjustedPosition;
+}
+
+size_t HostSelector::getGpioIndex(int fd)
+{
+    for (size_t index = 0; index < gpioLineCount; index++)
+    {
+        if (config.gpios[index].fd == fd)
+        {
+            return index;
+        }
+    }
+    return INVALID_INDEX;
+}
+void HostSelector::setInitialHostSelectorValue()
+{
+    char buf;
+    for (int index = 0; index < gpioLineCount; index++)
+    {
+        auto result = ::lseek(config.gpios[index].fd, 0, SEEK_SET);
+
+        if (result < 0)
+        {
+            log<level::ERR>(
+                "gpio fd lseek error!",
+                entry("FORM_FACTOR_TYPE=%s", (getFormFactorType()).c_str()));
+            throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error::
+                IOError();
+        }
+
+        result = ::read(config.gpios[index].fd, &buf, sizeof(buf));
+        if (result < 0)
+        {
+            log<level::ERR>(
+                "gpio fd read error!",
+                entry("FORM_FACTOR_TYPE=%s", (getFormFactorType()).c_str()));
+            throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error::
+                IOError();
+        }
+        GpioState gpioState =
+            (buf == '0') ? (GpioState::low) : (GpioState::high);
+        setHostSelectorValue(config.gpios[index].fd, gpioState);
+        size_t hsPosMapped = getMappedHSConfig(hostSelectorPosition);
+        if (hsPosMapped != INVALID_INDEX)
+        {
+            position(hsPosMapped, true);
+        }
+    }
+}
+
+void HostSelector::setHostSelectorValue(int fd, GpioState state)
+{
+    size_t pos = getGpioIndex(fd);
+
+    if (pos == INVALID_INDEX)
+    {
+        return;
+    }
+    auto set_bit = [](size_t& val, size_t n) { val |= 0xff & (1 << n); };
+
+    auto clr_bit = [](size_t& val, size_t n) { val &= ~(0xff & (1 << n)); };
+
+    auto bit_op = (state == GpioState::low) ? set_bit : clr_bit;
+
+    bit_op(hostSelectorPosition, pos);
+    return;
+}
+/**
+ * @brief This method is called from sd-event provided callback function
+ * callbackHandler if platform specific event handling is needed then a
+ * derived class instance with its specific event handling logic along with
+ * init() function can be created to override the default event handling
+ */
+
+void HostSelector::handleEvent(sd_event_source* es, int fd, uint32_t revents)
+{
+    int n = -1;
+    char buf = '0';
+
+    n = ::lseek(fd, 0, SEEK_SET);
+
+    if (n < 0)
+    {
+        log<level::ERR>(
+            "gpio fd lseek error!",
+            entry("FORM_FACTOR_TYPE=%s", (getFormFactorType()).c_str()));
+        return;
+    }
+
+    n = ::read(fd, &buf, sizeof(buf));
+    if (n < 0)
+    {
+        log<level::ERR>(
+            "gpio fd read error!",
+            entry("FORM_FACTOR_TYPE=%s", (getFormFactorType()).c_str()));
+        throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error::
+            IOError();
+    }
+
+    // read the gpio state for the io event received
+    GpioState gpioState = (buf == '0') ? (GpioState::low) : (GpioState::high);
+
+    setHostSelectorValue(fd, gpioState);
+
+    size_t hsPosMapped = getMappedHSConfig(hostSelectorPosition);
+
+    if (hsPosMapped != INVALID_INDEX)
+    {
+        position(hsPosMapped);
+    }
+}
\ No newline at end of file