cdev: Add function to find cdev by device_node

This adds a device_node member to struct cdev and a function
to find a cdev by device_node.
This also removes the setting of cdev->dev->device_node in
the of partition parser. We must not set the device since it
may not refer to a partition but to a whole device with partitions.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/driver.h b/include/driver.h
index 728f8abb49..046dd9079d 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -436,6 +436,7 @@ struct cdev {
 	struct file_operations *ops;
 	void *priv;
 	struct device_d *dev;
+	struct device_node *device_node;
 	struct list_head list;
 	struct list_head devices_list;
 	char *name; /* filename under /dev/ */
@@ -456,6 +457,7 @@ int devfs_remove(struct cdev *);
 int cdev_find_free_index(const char *);
 struct cdev *device_find_partition(struct device_d *dev, const char *name);
 struct cdev *cdev_by_name(const char *filename);
+struct cdev *cdev_by_device_node(struct device_node *node);
 struct cdev *cdev_open(const char *name, unsigned long flags);
 int cdev_do_open(struct cdev *, unsigned long flags);
 void cdev_close(struct cdev *cdev);