Input: prepare to switching to struct device

In preparation to switching to struct device and class device
going away provide an alias to allow drivers that create devices
to use either input_dev->cdev.dev or input_dev->dev.parent to
put them into sysfs tree. The former will go away once conversion
to struct device is complete.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 86b27079004a..173c2861ec58 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1079,6 +1079,9 @@ int input_register_device(struct input_dev *dev)
         snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
                  "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
 
+        if (!dev->cdev.dev)
+                dev->cdev.dev = dev->dev.parent;
+
         error = class_device_add(&dev->cdev);
         if (error)
                 return error;
diff --git a/include/linux/input.h b/include/linux/input.h
index d0bea9755186..7b6d7c408b07 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -972,6 +972,9 @@ struct input_dev {
         unsigned int users;
 
         struct class_device cdev;
+        union {                 /* temporarily so while we switching to struct device */
+                struct device *parent;
+        } dev;
 
         struct list_head        h_list;
         struct list_head        node;