nuxxt: add open and close callback functions for the mouse.

drivers/input/mouse_upper.c

@@ -101,6 +101,7 @@ static int mouse_open(FAR struct file *filep)
   FAR struct mouse_openpriv_s  *openpriv;
   FAR struct inode             *inode = filep->f_inode;
   FAR struct mouse_upperhalf_s *upper = inode->i_private;
+  FAR struct mouse_lowerhalf_s *lower = upper->lower;
   int ret;
 
   ret = nxmutex_lock(&upper->lock);
@@ -129,6 +130,11 @@ static int mouse_open(FAR struct file *filep)
   nxmutex_init(&openpriv->lock);
   list_add_tail(&upper->head, &openpriv->node);
 
+  if (lower->open && list_is_singular(&openpriv->node))
+    {
+      ret = lower->open(lower);
+    }
+
   /* Save the buffer node pointer so that it can be used directly
    * in the read operation.
    */
@@ -147,6 +153,7 @@ static int mouse_close(FAR struct file *filep)
   FAR struct mouse_openpriv_s  *openpriv = filep->f_priv;
   FAR struct inode             *inode    = filep->f_inode;
   FAR struct mouse_upperhalf_s *upper    = inode->i_private;
+  FAR struct mouse_lowerhalf_s *lower    = upper->lower;
   int ret;
 
   ret = nxmutex_lock(&upper->lock);
@@ -155,6 +162,11 @@ static int mouse_close(FAR struct file *filep)
       return ret;
     }
 
+  if (lower->close && list_is_singular(&openpriv->node))
+    {
+      ret = lower->close(lower);
+    }
+
   list_delete(&openpriv->node);
   circbuf_uninit(&openpriv->circbuf);
   nxsem_destroy(&openpriv->waitsem);

include/nuttx/input/mouse.h

@@ -143,6 +143,45 @@ struct mouse_lowerhalf_s
 
   CODE int (*control)(FAR struct mouse_lowerhalf_s *lower,
                       int cmd, unsigned long arg);
+
+  /**************************************************************************
+   * Name: open
+   *
+   * Description:
+   *   This function pointer is used to open a connection to the mouse driver
+   *   instance. It initializes the mouse and prepares it for subsequent
+   *   interactions with the user. This function typically sets up the state
+   *   of the driver and allocates any necessary resources.
+   *
+   * Input Parameters:
+   *   lower  - A pointer to the instance of the lower half mouse driver.
+   *   filep  - A pointer to the file structure representing the user.
+   *
+   * Returned Value:
+   *   It returns zero (OK) on success; a negative errno value on failure.
+   **************************************************************************/
+
+  CODE int (*open)(FAR struct mouse_lowerhalf_s *lower);
+
+  /**************************************************************************
+   * Name: close
+   *
+   * Description:
+   *   This function pointer is used to close the connection to the mouse
+   *   driver instance. It performs any necessary cleanup operations, such as
+   *   releasing resources and resetting the state of the mouse driver,
+   *   before ending theinteraction with the user.
+   *
+   * Input Parameters:
+   *   lower  - A pointer to the instance of the lower half mouse driver.
+   *   filep  - A pointer to the file structure representing the user closing
+   *            the mouse connection.
+   *
+   * Returned Value:
+   *   Returns zero (OK) on success; a negative errno value on failure.
+   **************************************************************************/
+
+  CODE int (*close)(FAR struct mouse_lowerhalf_s *lower);
 };
 
 /****************************************************************************