+void *dev_get_priv(struct udevice *dev);
+
+/**
+ * struct dev_get_parent() - Get the parent of a device
+ *
+ * @child: Child to check
+ * @return parent of child, or NULL if this is the root device
+ */
+struct udevice *dev_get_parent(struct udevice *child);
+
+/**
+ * dev_get_uclass_priv() - Get the private uclass data for a device
+ *
+ * This checks that dev is not NULL, but no other checks for now
+ *
+ * @dev Device to check
+ * @return private uclass data for this device, or NULL if none
+ */
+void *dev_get_uclass_priv(struct udevice *dev);
+
+/**
+ * dev_get_driver_data() - get the driver data used to bind a device
+ *
+ * When a device is bound using a device tree node, it matches a
+ * particular compatible string as in struct udevice_id. This function
+ * returns the associated data value for that compatible string. This is
+ * the 'data' field in struct udevice_id.
+ *
+ * For USB devices, this is the driver_info field in struct usb_device_id.
+ *
+ * @dev: Device to check
+ */
+ulong dev_get_driver_data(struct udevice *dev);
+
+/**
+ * dev_get_driver_ops() - get the device's driver's operations
+ *
+ * This checks that dev is not NULL, and returns the pointer to device's
+ * driver's operations.
+ *
+ * @dev: Device to check
+ * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
+ */
+const void *dev_get_driver_ops(struct udevice *dev);
+
+/*
+ * device_get_uclass_id() - return the uclass ID of a device
+ *
+ * @dev: Device to check
+ * @return uclass ID for the device
+ */
+enum uclass_id device_get_uclass_id(struct udevice *dev);
+
+/*
+ * dev_get_uclass_name() - return the uclass name of a device
+ *
+ * This checks that dev is not NULL.
+ *
+ * @dev: Device to check
+ * @return pointer to the uclass name for the device
+ */
+const char *dev_get_uclass_name(struct udevice *dev);
+
+/**
+ * device_get_child() - Get the child of a device by index
+ *
+ * Returns the numbered child, 0 being the first. This does not use
+ * sequence numbers, only the natural order.
+ *
+ * @dev: Parent device to check
+ * @index: Child index
+ * @devp: Returns pointer to device
+ */
+int device_get_child(struct udevice *parent, int index, struct udevice **devp);
+
+/**
+ * device_find_child_by_seq() - Find a child device based on a sequence
+ *
+ * This searches for a device with the given seq or req_seq.
+ *
+ * For seq, if an active device has this sequence it will be returned.
+ * If there is no such device then this will return -ENODEV.
+ *
+ * For req_seq, if a device (whether activated or not) has this req_seq
+ * value, that device will be returned. This is a strong indication that
+ * the device will receive that sequence when activated.
+ *
+ * @parent: Parent device
+ * @seq_or_req_seq: Sequence number to find (0=first)
+ * @find_req_seq: true to find req_seq, false to find seq
+ * @devp: Returns pointer to device (there is only one per for each seq).
+ * Set to NULL if none is found
+ * @return 0 if OK, -ve on error
+ */
+int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
+ bool find_req_seq, struct udevice **devp);
+
+/**
+ * device_get_child_by_seq() - Get a child device based on a sequence
+ *
+ * If an active device has this sequence it will be returned. If there is no
+ * such device then this will check for a device that is requesting this
+ * sequence.
+ *
+ * The device is probed to activate it ready for use.
+ *
+ * @parent: Parent device
+ * @seq: Sequence number to find (0=first)
+ * @devp: Returns pointer to device (there is only one per for each seq)
+ * Set to NULL if none is found
+ * @return 0 if OK, -ve on error
+ */
+int device_get_child_by_seq(struct udevice *parent, int seq,
+ struct udevice **devp);
+
+/**
+ * device_find_child_by_of_offset() - Find a child device based on FDT offset
+ *
+ * Locates a child device by its device tree offset.
+ *
+ * @parent: Parent device
+ * @of_offset: Device tree offset to find
+ * @devp: Returns pointer to device if found, otherwise this is set to NULL
+ * @return 0 if OK, -ve on error
+ */
+int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
+ struct udevice **devp);
+
+/**
+ * device_get_child_by_of_offset() - Get a child device based on FDT offset
+ *
+ * Locates a child device by its device tree offset.
+ *
+ * The device is probed to activate it ready for use.
+ *
+ * @parent: Parent device
+ * @of_offset: Device tree offset to find
+ * @devp: Returns pointer to device if found, otherwise this is set to NULL
+ * @return 0 if OK, -ve on error
+ */
+int device_get_child_by_of_offset(struct udevice *parent, int seq,
+ struct udevice **devp);
+
+/**
+ * device_find_first_child() - Find the first child of a device
+ *
+ * @parent: Parent device to search
+ * @devp: Returns first child device, or NULL if none
+ * @return 0
+ */
+int device_find_first_child(struct udevice *parent, struct udevice **devp);
+
+/**
+ * device_find_first_child() - Find the first child of a device
+ *
+ * @devp: Pointer to previous child device on entry. Returns pointer to next
+ * child device, or NULL if none
+ * @return 0
+ */
+int device_find_next_child(struct udevice **devp);
+
+/**
+ * dev_get_addr() - Get the reg property of a device
+ *
+ * @dev: Pointer to a device
+ *
+ * @return addr
+ */
+fdt_addr_t dev_get_addr(struct udevice *dev);
+
+/**
+ * device_has_children() - check if a device has any children
+ *
+ * @dev: Device to check
+ * @return true if the device has one or more children
+ */
+bool device_has_children(struct udevice *dev);
+
+/**
+ * device_has_active_children() - check if a device has any active children
+ *
+ * @dev: Device to check
+ * @return true if the device has one or more children and at least one of
+ * them is active (probed).
+ */
+bool device_has_active_children(struct udevice *dev);
+
+/**
+ * device_is_last_sibling() - check if a device is the last sibling
+ *
+ * This function can be useful for display purposes, when special action needs
+ * to be taken when displaying the last sibling. This can happen when a tree
+ * view of devices is being displayed.
+ *
+ * @dev: Device to check
+ * @return true if there are no more siblings after this one - i.e. is it
+ * last in the list.
+ */
+bool device_is_last_sibling(struct udevice *dev);