diff --git a/modules/input/evdev/InputDevice.h b/modules/input/evdev/InputDevice.h
index 7a99f90..b4f3244 100644
--- a/modules/input/evdev/InputDevice.h
+++ b/modules/input/evdev/InputDevice.h
@@ -21,6 +21,7 @@
 
 #include <utils/Timers.h>
 
+#include "InputHost.h"
 #include "InputHub.h"
 
 namespace android {
@@ -33,6 +34,7 @@
 public:
     virtual void processInput(InputEvent& event, nsecs_t currentTime) = 0;
 
+    virtual uint32_t getInputClasses() = 0;
 protected:
     InputDeviceInterface() = default;
     virtual ~InputDeviceInterface() = default;
@@ -43,18 +45,69 @@
  */
 class EvdevDevice : public InputDeviceInterface {
 public:
-    explicit EvdevDevice(const std::shared_ptr<InputDeviceNode>& node);
+    EvdevDevice(InputHost host, const std::shared_ptr<InputDeviceNode>& node);
     virtual ~EvdevDevice() override = default;
 
     virtual void processInput(InputEvent& event, nsecs_t currentTime) override;
 
+    virtual uint32_t getInputClasses() override { return mClasses; }
 private:
+    InputHost mHost;
     std::shared_ptr<InputDeviceNode> mDeviceNode;
+    InputDeviceIdentifier mInputId;
+    uint32_t mClasses = 0;
 
     int32_t mOverrideSec = 0;
     int32_t mOverrideUsec = 0;
 };
 
+/* Input device classes. */
+enum {
+    /* The input device is a keyboard or has buttons. */
+    INPUT_DEVICE_CLASS_KEYBOARD      = 0x00000001,
+
+    /* The input device is an alpha-numeric keyboard (not just a dial pad). */
+    INPUT_DEVICE_CLASS_ALPHAKEY      = 0x00000002,
+
+    /* The input device is a touchscreen or a touchpad (either single-touch or multi-touch). */
+    INPUT_DEVICE_CLASS_TOUCH         = 0x00000004,
+
+    /* The input device is a cursor device such as a trackball or mouse. */
+    INPUT_DEVICE_CLASS_CURSOR        = 0x00000008,
+
+    /* The input device is a multi-touch touchscreen. */
+    INPUT_DEVICE_CLASS_TOUCH_MT      = 0x00000010,
+
+    /* The input device is a directional pad (implies keyboard, has DPAD keys). */
+    INPUT_DEVICE_CLASS_DPAD          = 0x00000020,
+
+    /* The input device is a gamepad (implies keyboard, has BUTTON keys). */
+    INPUT_DEVICE_CLASS_GAMEPAD       = 0x00000040,
+
+    /* The input device has switches. */
+    INPUT_DEVICE_CLASS_SWITCH        = 0x00000080,
+
+    /* The input device is a joystick (implies gamepad, has joystick absolute axes). */
+    INPUT_DEVICE_CLASS_JOYSTICK      = 0x00000100,
+
+    /* The input device has a vibrator (supports FF_RUMBLE). */
+    INPUT_DEVICE_CLASS_VIBRATOR      = 0x00000200,
+
+    /* The input device has a microphone. */
+    // TODO: remove this and let the host take care of it
+    INPUT_DEVICE_CLASS_MIC           = 0x00000400,
+
+    /* The input device is an external stylus (has data we want to fuse with touch data). */
+    INPUT_DEVICE_CLASS_EXTERNAL_STYLUS = 0x00000800,
+
+    /* The input device is virtual (not a real device, not part of UI configuration). */
+    /* not used - INPUT_DEVICE_CLASS_VIRTUAL       = 0x40000000, */
+
+    /* The input device is external (not built-in). */
+    // TODO: remove this and let the host take care of it?
+    INPUT_DEVICE_CLASS_EXTERNAL      = 0x80000000,
+};
+
 }  // namespace android
 
 #endif  // ANDROID_INPUT_DEVICE_H_