+/**
+ * device_find_first_inactive_child() - Find the first inactive child
+ *
+ * This is used to locate an existing child of a device which is of a given
+ * uclass.
+ *
+ * The device is NOT probed
+ *
+ * @parent: Parent device to search
+ * @uclass_id: Uclass to look for
+ * @devp: Returns device found, if any
+ * @return 0 if found, else -ENODEV
+ */
+int device_find_first_inactive_child(const struct udevice *parent,
+ enum uclass_id uclass_id,
+ struct udevice **devp);
+
+/**
+ * device_find_first_child_by_uclass() - Find the first child of a device in uc
+ *
+ * @parent: Parent device to search
+ * @uclass_id: Uclass to look for
+ * @devp: Returns first child device in that uclass, if any
+ * @return 0 if found, else -ENODEV
+ */
+int device_find_first_child_by_uclass(const struct udevice *parent,
+ enum uclass_id uclass_id,
+ struct udevice **devp);
+
+/**
+ * device_find_child_by_name() - Find a child by device name
+ *
+ * @parent: Parent device to search
+ * @name: Name to look for
+ * @devp: Returns device found, if any
+ * @return 0 if found, else -ENODEV
+ */
+int device_find_child_by_name(const struct udevice *parent, const char *name,
+ struct udevice **devp);
+
+/**
+ * device_first_child_ofdata_err() - Find the first child and reads its platdata
+ *
+ * The ofdata_to_platdata() method is called on the child before it is returned,
+ * but the child is not probed.
+ *
+ * @parent: Parent to check
+ * @devp: Returns child that was found, if any
+ * @return 0 on success, -ENODEV if no children, other -ve on error
+ */
+int device_first_child_ofdata_err(struct udevice *parent,
+ struct udevice **devp);
+
+/*
+ * device_next_child_ofdata_err() - Find the next child and read its platdata
+ *
+ * The ofdata_to_platdata() method is called on the child before it is returned,
+ * but the child is not probed.
+ *
+ * @devp: On entry, points to the previous child; on exit returns the child that
+ * was found, if any
+ * @return 0 on success, -ENODEV if no children, other -ve on error
+ */
+int device_next_child_ofdata_err(struct udevice **devp);
+
+/**
+ * device_first_child_err() - Get the first child of a device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @parent: Parent device to search
+ * @devp: Returns device found, if any
+ * @return 0 if found, -ENODEV if not, -ve error if device failed to probe
+ */
+int device_first_child_err(struct udevice *parent, struct udevice **devp);
+
+/**
+ * device_next_child_err() - Get the next child of a parent device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @devp: On entry, pointer to device to lookup. On exit, returns pointer
+ * to the next sibling if no error occurred
+ * @return 0 if found, -ENODEV if not, -ve error if device failed to probe
+ */
+int device_next_child_err(struct udevice **devp);
+