1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2012 Pantelis Antoniou <panto@antoniou-consulting.com>
25 	struct device_node *node;  in live_tree_max_phandle()  local
31 	for_each_of_allnodes(node) {  in live_tree_max_phandle()
32 		if (node->phandle != OF_PHANDLE_ILLEGAL &&  in live_tree_max_phandle()
33 				node->phandle > phandle)  in live_tree_max_phandle()
34 			phandle = node->phandle;  in live_tree_max_phandle()
44 	struct device_node *child;  in adjust_overlay_phandles()  local
48 	/* adjust node's phandle in node */  in adjust_overlay_phandles()
49 	if (overlay->phandle != 0 && overlay->phandle != OF_PHANDLE_ILLEGAL)  in adjust_overlay_phandles()
50 		overlay->phandle += phandle_delta;  in adjust_overlay_phandles()
55 		if (of_prop_cmp(prop->name, "phandle") &&  in adjust_overlay_phandles()
56 		    of_prop_cmp(prop->name, "linux,phandle"))  in adjust_overlay_phandles()
59 		if (prop->length < 4)  in adjust_overlay_phandles()
62 		phandle = be32_to_cpup(prop->value);  in adjust_overlay_phandles()
66 		*(__be32 *)prop->value = cpu_to_be32(overlay->phandle);  in adjust_overlay_phandles()
69 	for_each_child_of_node(overlay, child)  in adjust_overlay_phandles()
70 		adjust_overlay_phandles(child, phandle_delta);  in adjust_overlay_phandles()
78 	char *value __free(kfree) = kmemdup(prop_fixup->value, prop_fixup->length, GFP_KERNEL);  in update_usages_of_a_phandle_reference()
84 		return -ENOMEM;  in update_usages_of_a_phandle_reference()
87 	end = value + prop_fixup->length;  in update_usages_of_a_phandle_reference()
94 			return -EINVAL;  in update_usages_of_a_phandle_reference()
100 			return -EINVAL;  in update_usages_of_a_phandle_reference()
112 			if (!of_prop_cmp(prop->name, prop_name))  in update_usages_of_a_phandle_reference()
118 			return -ENOENT;  in update_usages_of_a_phandle_reference()
120 		if (offset < 0 || offset + sizeof(__be32) > prop->length)  in update_usages_of_a_phandle_reference()
121 			return -EINVAL;  in update_usages_of_a_phandle_reference()
123 		*(__be32 *)(prop->value + offset) = cpu_to_be32(phandle);  in update_usages_of_a_phandle_reference()
133 	const char *n1 = kbasename(dn1->full_name);  in node_name_cmp()
134 	const char *n2 = kbasename(dn2->full_name);  in node_name_cmp()
142  * Subtree @local_fixups, which is overlay node __local_fixups__,
143  * mirrors the fragment node structure at the root of the overlay.
164 		if (!of_prop_cmp(prop_fix->name, "name") ||  in adjust_local_phandle_references()
165 		    !of_prop_cmp(prop_fix->name, "phandle") ||  in adjust_local_phandle_references()
166 		    !of_prop_cmp(prop_fix->name, "linux,phandle"))  in adjust_local_phandle_references()
169 		if ((prop_fix->length % 4) != 0 || prop_fix->length == 0)  in adjust_local_phandle_references()
170 			return -EINVAL;  in adjust_local_phandle_references()
171 		count = prop_fix->length / sizeof(__be32);  in adjust_local_phandle_references()
174 			if (!of_prop_cmp(prop->name, prop_fix->name))  in adjust_local_phandle_references()
179 			return -EINVAL;  in adjust_local_phandle_references()
182 			off = be32_to_cpu(((__be32 *)prop_fix->value)[i]);  in adjust_local_phandle_references()
183 			if ((off + 4) > prop->length)  in adjust_local_phandle_references()
184 				return -EINVAL;  in adjust_local_phandle_references()
186 			be32_add_cpu(prop->value + off, phandle_delta);  in adjust_local_phandle_references()
192 	 * node names in the two subtrees match.  in adjust_local_phandle_references()
194 	 * The roots of the subtrees are the overlay's __local_fixups__ node  in adjust_local_phandle_references()
195 	 * and the overlay's root node.  in adjust_local_phandle_references()
197 	for_each_child_of_node_scoped(local_fixups, child) {  in adjust_local_phandle_references()
200 			if (!node_name_cmp(child, overlay_child)) {  in adjust_local_phandle_references()
206 			return -EINVAL;  in adjust_local_phandle_references()
208 		err = adjust_local_phandle_references(child, overlay_child,  in adjust_local_phandle_references()
218  * of_resolve_phandles - Relocate and resolve overlay against live tree
233  * The name of each property in the "__fixups__" node in the overlay matches
235  * property in the "__fixups__" node is a list of the property values in the
252 	struct device_node *child, *local_fixups, *refnode;  in of_resolve_phandles()  local
263 		err = -EINVAL;  in of_resolve_phandles()
269 		err = -EINVAL;  in of_resolve_phandles()
286 	for_each_child_of_node(overlay, child) {  in of_resolve_phandles()
287 		if (of_node_name_eq(child, "__fixups__"))  in of_resolve_phandles()
288 			overlay_fixups = child;  in of_resolve_phandles()
299 		err = -EINVAL;  in of_resolve_phandles()
306 		if (!of_prop_cmp(prop->name, "name"))  in of_resolve_phandles()
310 				prop->name, &refpath);  in of_resolve_phandles()
312 			pr_err("node label '%s' not found in live devicetree symbols table\n",  in of_resolve_phandles()
313 			       prop->name);  in of_resolve_phandles()
319 			err = -ENOENT;  in of_resolve_phandles()
323 		phandle = refnode->phandle;  in of_resolve_phandles()