dm: core: Add functions to obtain node's address/size cells
The of_n_addr_cells() and of_n_size_cells() functions are useful for
getting the size of addresses in a node, but in a few places U-Boot needs
to obtain the actual property value for a node without walking up the
stack. Add functions for this and just the existing code to use it.
Add a comment to the existing ofnode functions which do not do the right
thing with a flat tree.
This fixes a problem reading PCI addresses.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index d261a61..c3d8db5 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -562,6 +562,26 @@
int ofnode_read_size_cells(ofnode node);
/**
+ * ofnode_read_simple_addr_cells() - Get the address cells property in a node
+ *
+ * This function matches fdt_address_cells().
+ *
+ * @np: Node pointer to check
+ * @return value of #address-cells property in this node, or 2 if none
+ */
+int ofnode_read_simple_addr_cells(ofnode node);
+
+/**
+ * ofnode_read_simple_size_cells() - Get the size cells property in a node
+ *
+ * This function matches fdt_size_cells().
+ *
+ * @np: Node pointer to check
+ * @return value of #size-cells property in this node, or 2 if none
+ */
+int ofnode_read_simple_size_cells(ofnode node);
+
+/**
* ofnode_pre_reloc() - check if a node should be bound before relocation
*
* Device tree nodes can be marked as needing-to-be-bound in the loader stages