dm: core: Allow finding children / uclasses by partial name

In some cases it is useful to search just by a partial name, such as
when looking for a sibling device that has a common name substring. Add
helper functions to handle these requirements.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/dm/device.h

@@ -758,6 +758,18 @@ 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
+ * @len:	Length of the name
+ * @devp:	Returns device found, if any
+ * @return 0 if found, else -ENODEV
+ */
+int device_find_child_by_namelen(const struct udevice *parent, const char *name,
+				 int len, struct udevice **devp);
+
 /**
  * device_find_child_by_name() - Find a child by device name
  *

include/dm/uclass.h

@@ -172,6 +172,15 @@ int uclass_get(enum uclass_id key, struct uclass **ucp);
  */
 const char *uclass_get_name(enum uclass_id id);
 
+/**
+ * uclass_get_by_name() - Look up a uclass by its driver name
+ *
+ * @name: Name to look up
+ * @len: Length of name
+ * @returns the associated uclass ID, or UCLASS_INVALID if not found
+ */
+enum uclass_id uclass_get_by_name_len(const char *name, int len);
+
 /**
  * uclass_get_by_name() - Look up a uclass by its driver name
  *