touchscreen: add touchscreen hal interface

- If a target has touchscreen, the touchscreen
  can be enabled or disable by some scenarios.
  Thus the hal interface for touchscreen is
  added.

Change-Id: I037af46a8dbeff606655e4714fc37bd20a9e3f99
Signed-off-by: Taeyoung Kim <ty317.kim@samsung.com>

diff --git a/hw/touchscreen.h b/hw/touchscreen.h
new file mode 100644 (file)
index 0000000..9614164
--- /dev/null
+++ b/hw/touchscreen.h
@@ -0,0 +1,48 @@
+/*
+ * libdevice-node
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ *
+ * 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.
+ */
+
+
+#ifndef __HW_TOUCHSCREEN_H__
+#define __HW_TOUCHSCREEN_H__
+
+#include <hw/common.h>
+
+/**
+ * The id of this device
+ */
+#define TOUCHSCREEN_HARDWARE_DEVICE_ID "touchscreen"
+
+/**
+ * The version of this device
+ */
+#define TOUCHSCREEN_HARDWARE_DEVICE_VERSION    MAKE_VERSION(0,1)
+
+enum touchscreen_state {
+       TOUCHSCREEN_OFF,     /* Disable touchscreen */
+       TOUCHSCREEN_ON,      /* Enable touchscreen */
+};
+
+struct touchscreen_device {
+       struct hw_common common;
+
+       /* Control touchscreen state */
+       int (*get_state)(enum touchscreen_state *state);
+       int (*set_state)(enum touchscreen_state state);
+};
+
+#endif