| overlay.c (b46c78661c42cb8b07eb213104c79cbab8ea7e0d) | overlay.c (b89dae1852869d6bb3e4a8e3c6bdaf86dc2ef9da) |
|---|---|
| 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Functions for working with device tree overlays 4 * 5 * Copyright (C) 2012 Pantelis Antoniou <panto@antoniou-consulting.com> 6 * Copyright (C) 2012 Texas Instruments Inc. 7 */ 8 --- 298 unchanged lines hidden (view full) --- 307 * to add @node in @target_node. 308 * 309 * If @node already exists in @target_node, and the existing node has 310 * a phandle, the overlay node is not allowed to have a phandle. 311 * 312 * If @node has child nodes, add the children recursively via 313 * build_changeset_next_level(). 314 * | 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Functions for working with device tree overlays 4 * 5 * Copyright (C) 2012 Pantelis Antoniou <panto@antoniou-consulting.com> 6 * Copyright (C) 2012 Texas Instruments Inc. 7 */ 8 --- 298 unchanged lines hidden (view full) --- 307 * to add @node in @target_node. 308 * 309 * If @node already exists in @target_node, and the existing node has 310 * a phandle, the overlay node is not allowed to have a phandle. 311 * 312 * If @node has child nodes, add the children recursively via 313 * build_changeset_next_level(). 314 * |
| 315 * NOTE: Multiple mods of created nodes not supported. | 315 * NOTE_1: A live devicetree created from a flattened device tree (FDT) will 316 * not contain the full path in node->full_name. Thus an overlay 317 * created from an FDT also will not contain the full path in 318 * node->full_name. However, a live devicetree created from Open 319 * Firmware may have the full path in node->full_name. 320 * 321 * add_changeset_node() follows the FDT convention and does not include 322 * the full path in node->full_name. Even though it expects the overlay 323 * to not contain the full path, it uses kbasename() to remove the 324 * full path should it exist. It also uses kbasename() in comparisons 325 * to nodes in the live devicetree so that it can apply an overlay to 326 * a live devicetree created from Open Firmware. 327 * 328 * NOTE_2: Multiple mods of created nodes not supported. |
| 316 * If more than one fragment contains a node that does not already exist 317 * in the live tree, then for each fragment of_changeset_attach_node() 318 * will add a changeset entry to add the node. When the changeset is 319 * applied, __of_attach_node() will attach the node twice (once for 320 * each fragment). At this point the device tree will be corrupted. 321 * 322 * TODO: add integrity check to ensure that multiple fragments do not 323 * create the same node. --- 10 unchanged lines hidden (view full) --- 334 335 node_kbasename = kbasename(node->full_name); 336 337 for_each_child_of_node(target_node, tchild) 338 if (!of_node_cmp(node_kbasename, kbasename(tchild->full_name))) 339 break; 340 341 if (!tchild) { | 329 * If more than one fragment contains a node that does not already exist 330 * in the live tree, then for each fragment of_changeset_attach_node() 331 * will add a changeset entry to add the node. When the changeset is 332 * applied, __of_attach_node() will attach the node twice (once for 333 * each fragment). At this point the device tree will be corrupted. 334 * 335 * TODO: add integrity check to ensure that multiple fragments do not 336 * create the same node. --- 10 unchanged lines hidden (view full) --- 347 348 node_kbasename = kbasename(node->full_name); 349 350 for_each_child_of_node(target_node, tchild) 351 if (!of_node_cmp(node_kbasename, kbasename(tchild->full_name))) 352 break; 353 354 if (!tchild) { |
| 342 tchild = __of_node_dup(node, "%pOF/%s", 343 target_node, node_kbasename); | 355 tchild = __of_node_dup(node, node_kbasename); |
| 344 if (!tchild) 345 return -ENOMEM; 346 347 tchild->parent = target_node; 348 349 ret = of_changeset_attach_node(&ovcs->cset, tchild); 350 if (ret) 351 return ret; --- 730 unchanged lines hidden --- | 356 if (!tchild) 357 return -ENOMEM; 358 359 tchild->parent = target_node; 360 361 ret = of_changeset_attach_node(&ovcs->cset, tchild); 362 if (ret) 363 return ret; --- 730 unchanged lines hidden --- |