dm: core: Add function to access uclass priv

Add functions so this information is not accessed directly. This will be
needed for of-platdata which stores it in a different place.

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

drivers/core/uclass.c

@@ -160,6 +160,16 @@ const char *uclass_get_name(enum uclass_id id)
 	return uc->uc_drv->name;
 }
 
+void *uclass_get_priv(const struct uclass *uc)
+{
+	return uc->priv;
+}
+
+void uclass_set_priv(struct uclass *uc, void *priv)
+{
+	uc->priv = priv;
+}
+
 enum uclass_id uclass_get_by_name(const char *name)
 {
 	int i;

include/dm/uclass-internal.h

@@ -11,6 +11,20 @@
 
 #include <dm/ofnode.h>
 
+/**
+ * uclass_set_priv() - Set the private data for a uclass
+ *
+ * This is normally handled by driver model, which automatically allocates
+ * private data when an 'auto' size if provided by the uclass driver.
+ *
+ * Use this function to override normal operation for special situations, such
+ * as needing to allocate a variable amount of data.
+ *
+ * @uc		Uclass to update
+ * @priv	New private-data pointer
+ */
+void uclass_set_priv(struct uclass *uc, void *priv);
+
 /**
  * uclass_find_next_free_seq() - Get the next free sequence number
  *

include/dm/uclass.h

@@ -114,6 +114,14 @@ struct uclass_driver {
 #define UCLASS_DRIVER(__name)						\
 	ll_entry_declare(struct uclass_driver, __name, uclass_driver)
 
+/**
+ * uclass_get_priv() - Get the private data for a uclass
+ *
+ * @uc		Uclass to check
+ * @return private data, or NULL if none
+ */
+void *uclass_get_priv(const struct uclass *uc);
+
 /**
  * uclass_get() - Get a uclass based on an ID, creating it if needed
  *