Input: add open and close methods for polled devices

Optional open and close methods for preparing and closing
the device.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 13 insertions, 7 deletions

diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c
index 0d3ce7a50fb1..910220c127cb 100644
--- a/drivers/input/input-polldev.c
+++ b/drivers/input/input-polldev.c
@@ -80,8 +80,8 @@ static int input_open_polled_device(struct input_dev *input)
         if (error)
                 return error;
 
-        if (dev->flush)
-                dev->flush(dev);
+        if (dev->open)
+                dev->open(dev);
 
         queue_delayed_work(polldev_wq, &dev->work,
                            msecs_to_jiffies(dev->poll_interval));
@@ -95,6 +95,9 @@ static void input_close_polled_device(struct input_dev *input)
 
         cancel_delayed_work_sync(&dev->work);
         input_polldev_stop_workqueue();
+
+        if (dev->close)
+                dev->close(dev);
 }
 
 /**
diff --git a/drivers/input/misc/wistron_btns.c b/drivers/input/misc/wistron_btns.c
index a932179c4c9e..00eb9d651d97 100644
--- a/drivers/input/misc/wistron_btns.c
+++ b/drivers/input/misc/wistron_btns.c
@@ -1263,7 +1263,7 @@ static int __devinit setup_input_dev(void)
         if (!wistron_idev)
                 return -ENOMEM;
 
-        wistron_idev->flush = wistron_flush;
+        wistron_idev->open = wistron_flush;
         wistron_idev->poll = wistron_poll;
         wistron_idev->poll_interval = POLL_INTERVAL_DEFAULT;
 
diff --git a/include/linux/input-polldev.h b/include/linux/input-polldev.h
index 597a0077b3c5..5c0ec68a965e 100644
--- a/include/linux/input-polldev.h
+++ b/include/linux/input-polldev.h
@@ -14,9 +14,11 @@
 
 /**
  * struct input_polled_dev - simple polled input device
- * @private: private driver data
- * @flush: driver-supplied method that flushes device's state upon
- *      opening (optional)
+ * @private: private driver data.
+ * @open: driver-supplied method that prepares device for polling
+ *      (enabled the device and maybe flushes device state).
+ * @close: driver-supplied method that is called when device is no
+ *      longer being polled. Used to put device into low power mode.
  * @poll: driver-supplied method that polls the device and posts
  *      input events (mandatory).
  * @poll_interval: specifies how often the poll() method shoudl be called.
@@ -30,7 +32,8 @@
 struct input_polled_dev {
         void *private;
 
-        void (*flush)(struct input_polled_dev *dev);
+        void (*open)(struct input_polled_dev *dev);
+        void (*close)(struct input_polled_dev *dev);
         void (*poll)(struct input_polled_dev *dev);
         unsigned int poll_interval; /* msec */