1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2012 Pantelis Antoniou <panto@antoniou-consulting.com>
24 	struct device_node *node;  in live_tree_max_phandle()  local
30 	for_each_of_allnodes(node) {  in live_tree_max_phandle()
31 		if (node->phandle != OF_PHANDLE_ILLEGAL &&  in live_tree_max_phandle()
32 				node->phandle > phandle)  in live_tree_max_phandle()
33 			phandle = node->phandle;  in live_tree_max_phandle()
43 	struct device_node *child;  in adjust_overlay_phandles()  local
47 	/* adjust node's phandle in node */  in adjust_overlay_phandles()
48 	if (overlay->phandle != 0 && overlay->phandle != OF_PHANDLE_ILLEGAL)  in adjust_overlay_phandles()
49 		overlay->phandle += phandle_delta;  in adjust_overlay_phandles()
54 		if (of_prop_cmp(prop->name, "phandle") &&  in adjust_overlay_phandles()
55 		    of_prop_cmp(prop->name, "linux,phandle"))  in adjust_overlay_phandles()
58 		if (prop->length < 4)  in adjust_overlay_phandles()
61 		phandle = be32_to_cpup(prop->value);  in adjust_overlay_phandles()
65 		*(__be32 *)prop->value = cpu_to_be32(overlay->phandle);  in adjust_overlay_phandles()
68 	for_each_child_of_node(overlay, child)  in adjust_overlay_phandles()
69 		adjust_overlay_phandles(child, phandle_delta);  in adjust_overlay_phandles()
81 	value = kmemdup(prop_fixup->value, prop_fixup->length, GFP_KERNEL);  in update_usages_of_a_phandle_reference()
83 		return -ENOMEM;  in update_usages_of_a_phandle_reference()
86 	end = value + prop_fixup->length;  in update_usages_of_a_phandle_reference()
93 			err = -EINVAL;  in update_usages_of_a_phandle_reference()
101 			err = -EINVAL;  in update_usages_of_a_phandle_reference()
115 			if (!of_prop_cmp(prop->name, prop_name))  in update_usages_of_a_phandle_reference()
121 			err = -ENOENT;  in update_usages_of_a_phandle_reference()
125 		if (offset < 0 || offset + sizeof(__be32) > prop->length) {  in update_usages_of_a_phandle_reference()
126 			err = -EINVAL;  in update_usages_of_a_phandle_reference()
130 		*(__be32 *)(prop->value + offset) = cpu_to_be32(phandle);  in update_usages_of_a_phandle_reference()
142 	const char *n1 = kbasename(dn1->full_name);  in node_name_cmp()
143 	const char *n2 = kbasename(dn2->full_name);  in node_name_cmp()
151  * Subtree @local_fixups, which is overlay node __local_fixups__,
152  * mirrors the fragment node structure at the root of the overlay.
162 	struct device_node *child, *overlay_child;  in adjust_local_phandle_references()  local
173 		if (!of_prop_cmp(prop_fix->name, "name") ||  in adjust_local_phandle_references()
174 		    !of_prop_cmp(prop_fix->name, "phandle") ||  in adjust_local_phandle_references()
175 		    !of_prop_cmp(prop_fix->name, "linux,phandle"))  in adjust_local_phandle_references()
178 		if ((prop_fix->length % 4) != 0 || prop_fix->length == 0)  in adjust_local_phandle_references()
179 			return -EINVAL;  in adjust_local_phandle_references()
180 		count = prop_fix->length / sizeof(__be32);  in adjust_local_phandle_references()
183 			if (!of_prop_cmp(prop->name, prop_fix->name))  in adjust_local_phandle_references()
188 			return -EINVAL;  in adjust_local_phandle_references()
191 			off = be32_to_cpu(((__be32 *)prop_fix->value)[i]);  in adjust_local_phandle_references()
192 			if ((off + 4) > prop->length)  in adjust_local_phandle_references()
193 				return -EINVAL;  in adjust_local_phandle_references()
195 			be32_add_cpu(prop->value + off, phandle_delta);  in adjust_local_phandle_references()
201 	 * node names in the two subtrees match.  in adjust_local_phandle_references()
203 	 * The roots of the subtrees are the overlay's __local_fixups__ node  in adjust_local_phandle_references()
204 	 * and the overlay's root node.  in adjust_local_phandle_references()
206 	for_each_child_of_node(local_fixups, child) {  in adjust_local_phandle_references()
209 			if (!node_name_cmp(child, overlay_child)) {  in adjust_local_phandle_references()
215 			of_node_put(child);  in adjust_local_phandle_references()
216 			return -EINVAL;  in adjust_local_phandle_references()
219 		err = adjust_local_phandle_references(child, overlay_child,  in adjust_local_phandle_references()
222 			of_node_put(child);  in adjust_local_phandle_references()
231  * of_resolve_phandles - Relocate and resolve overlay against live tree
246  * The name of each property in the "__fixups__" node in the overlay matches
248  * property in the "__fixups__" node is a list of the property values in the
265 	struct device_node *child, *local_fixups, *refnode;  in of_resolve_phandles()  local
276 		err = -EINVAL;  in of_resolve_phandles()
282 		err = -EINVAL;  in of_resolve_phandles()
299 	for_each_child_of_node(overlay, child) {  in of_resolve_phandles()
300 		if (of_node_name_eq(child, "__fixups__"))  in of_resolve_phandles()
301 			overlay_fixups = child;  in of_resolve_phandles()
312 		err = -EINVAL;  in of_resolve_phandles()
319 		if (!of_prop_cmp(prop->name, "name"))  in of_resolve_phandles()
323 				prop->name, &refpath);  in of_resolve_phandles()
325 			pr_err("node label '%s' not found in live devicetree symbols table\n",  in of_resolve_phandles()
326 			       prop->name);  in of_resolve_phandles()
332 			err = -ENOENT;  in of_resolve_phandles()
336 		phandle = refnode->phandle;  in of_resolve_phandles()