drivers: add generic screen wrapper around display and touch devices

drivers/include/screen_dev.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2020 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @defgroup    drivers_screen_dev Screen device generic API
+ * @ingroup     drivers_display
+ * @brief       Define the generic API of a screen device
+ *
+ * @see drivers_disp_dev @see drivers_touch_dev
+ *
+ * @experimental This API is experimental and in an early state - expect
+ *               changes!
+ * @{
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef SCREEN_DEV_H
+#define SCREEN_DEV_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "disp_dev.h"
+
+#ifdef MODULE_TOUCH_DEV
+#include "touch_dev.h"
+#endif
+
+/**
+ * @brief   Screen device descriptor
+ */
+typedef struct {
+    disp_dev_t *display;            /**< Pointer to the display device */
+#if MODULE_TOUCH_DEV || DOXYGEN
+    touch_dev_t *touch;             /**< Pointer to the touch device */
+#endif
+} screen_dev_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SCREEN_DEV_H */
+/** @} */