1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * drivers/of/property.c - Procedures for accessing and interpreting
4 * Devicetree properties and graphs.
5 *
6 * Initially created by copying procedures from drivers/of/base.c. This
7 * file contains the OF property as well as the OF graph interface
8 * functions.
9 *
10 * Paul Mackerras August 1996.
11 * Copyright (C) 1996-2005 Paul Mackerras.
12 *
13 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
14 * {engebret|bergner}@us.ibm.com
15 *
16 * Adapted for sparc and sparc64 by David S. Miller davem@davemloft.net
17 *
18 * Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and
19 * Grant Likely.
20 */
21
22#define pr_fmt(fmt) "OF: " fmt
23
24#include <linux/of.h>
25#include <linux/of_address.h>
26#include <linux/of_device.h>
27#include <linux/of_graph.h>
28#include <linux/of_irq.h>
29#include <linux/string.h>
30#include <linux/moduleparam.h>
31
32#include "of_private.h"
33
34/**
35 * of_graph_is_present() - check graph's presence
36 * @node: pointer to device_node containing graph port
37 *
38 * Return: True if @node has a port or ports (with a port) sub-node,
39 * false otherwise.
40 */
41bool of_graph_is_present(const struct device_node *node)
42{
43 struct device_node *ports, *port;
44
45 ports = of_get_child_by_name(node, name: "ports");
46 if (ports)
47 node = ports;
48
49 port = of_get_child_by_name(node, name: "port");
50 of_node_put(node: ports);
51 of_node_put(node: port);
52
53 return !!port;
54}
55EXPORT_SYMBOL(of_graph_is_present);
56
57/**
58 * of_property_count_elems_of_size - Count the number of elements in a property
59 *
60 * @np: device node from which the property value is to be read.
61 * @propname: name of the property to be searched.
62 * @elem_size: size of the individual element
63 *
64 * Search for a property in a device node and count the number of elements of
65 * size elem_size in it.
66 *
67 * Return: The number of elements on sucess, -EINVAL if the property does not
68 * exist or its length does not match a multiple of elem_size and -ENODATA if
69 * the property does not have a value.
70 */
71int of_property_count_elems_of_size(const struct device_node *np,
72 const char *propname, int elem_size)
73{
74 struct property *prop = of_find_property(np, name: propname, NULL);
75
76 if (!prop)
77 return -EINVAL;
78 if (!prop->value)
79 return -ENODATA;
80
81 if (prop->length % elem_size != 0) {
82 pr_err("size of %s in node %pOF is not a multiple of %d\n",
83 propname, np, elem_size);
84 return -EINVAL;
85 }
86
87 return prop->length / elem_size;
88}
89EXPORT_SYMBOL_GPL(of_property_count_elems_of_size);
90
91/**
92 * of_find_property_value_of_size
93 *
94 * @np: device node from which the property value is to be read.
95 * @propname: name of the property to be searched.
96 * @min: minimum allowed length of property value
97 * @max: maximum allowed length of property value (0 means unlimited)
98 * @len: if !=NULL, actual length is written to here
99 *
100 * Search for a property in a device node and valid the requested size.
101 *
102 * Return: The property value on success, -EINVAL if the property does not
103 * exist, -ENODATA if property does not have a value, and -EOVERFLOW if the
104 * property data is too small or too large.
105 *
106 */
107static void *of_find_property_value_of_size(const struct device_node *np,
108 const char *propname, u32 min, u32 max, size_t *len)
109{
110 struct property *prop = of_find_property(np, name: propname, NULL);
111
112 if (!prop)
113 return ERR_PTR(error: -EINVAL);
114 if (!prop->value)
115 return ERR_PTR(error: -ENODATA);
116 if (prop->length < min)
117 return ERR_PTR(error: -EOVERFLOW);
118 if (max && prop->length > max)
119 return ERR_PTR(error: -EOVERFLOW);
120
121 if (len)
122 *len = prop->length;
123
124 return prop->value;
125}
126
127/**
128 * of_property_read_u32_index - Find and read a u32 from a multi-value property.
129 *
130 * @np: device node from which the property value is to be read.
131 * @propname: name of the property to be searched.
132 * @index: index of the u32 in the list of values
133 * @out_value: pointer to return value, modified only if no error.
134 *
135 * Search for a property in a device node and read nth 32-bit value from
136 * it.
137 *
138 * Return: 0 on success, -EINVAL if the property does not exist,
139 * -ENODATA if property does not have a value, and -EOVERFLOW if the
140 * property data isn't large enough.
141 *
142 * The out_value is modified only if a valid u32 value can be decoded.
143 */
144int of_property_read_u32_index(const struct device_node *np,
145 const char *propname,
146 u32 index, u32 *out_value)
147{
148 const u32 *val = of_find_property_value_of_size(np, propname,
149 min: ((index + 1) * sizeof(*out_value)),
150 max: 0,
151 NULL);
152
153 if (IS_ERR(ptr: val))
154 return PTR_ERR(ptr: val);
155
156 *out_value = be32_to_cpup(p: ((__be32 *)val) + index);
157 return 0;
158}
159EXPORT_SYMBOL_GPL(of_property_read_u32_index);
160
161/**
162 * of_property_read_u64_index - Find and read a u64 from a multi-value property.
163 *
164 * @np: device node from which the property value is to be read.
165 * @propname: name of the property to be searched.
166 * @index: index of the u64 in the list of values
167 * @out_value: pointer to return value, modified only if no error.
168 *
169 * Search for a property in a device node and read nth 64-bit value from
170 * it.
171 *
172 * Return: 0 on success, -EINVAL if the property does not exist,
173 * -ENODATA if property does not have a value, and -EOVERFLOW if the
174 * property data isn't large enough.
175 *
176 * The out_value is modified only if a valid u64 value can be decoded.
177 */
178int of_property_read_u64_index(const struct device_node *np,
179 const char *propname,
180 u32 index, u64 *out_value)
181{
182 const u64 *val = of_find_property_value_of_size(np, propname,
183 min: ((index + 1) * sizeof(*out_value)),
184 max: 0, NULL);
185
186 if (IS_ERR(ptr: val))
187 return PTR_ERR(ptr: val);
188
189 *out_value = be64_to_cpup(p: ((__be64 *)val) + index);
190 return 0;
191}
192EXPORT_SYMBOL_GPL(of_property_read_u64_index);
193
194/**
195 * of_property_read_variable_u8_array - Find and read an array of u8 from a
196 * property, with bounds on the minimum and maximum array size.
197 *
198 * @np: device node from which the property value is to be read.
199 * @propname: name of the property to be searched.
200 * @out_values: pointer to found values.
201 * @sz_min: minimum number of array elements to read
202 * @sz_max: maximum number of array elements to read, if zero there is no
203 * upper limit on the number of elements in the dts entry but only
204 * sz_min will be read.
205 *
206 * Search for a property in a device node and read 8-bit value(s) from
207 * it.
208 *
209 * dts entry of array should be like:
210 * ``property = /bits/ 8 <0x50 0x60 0x70>;``
211 *
212 * Return: The number of elements read on success, -EINVAL if the property
213 * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
214 * if the property data is smaller than sz_min or longer than sz_max.
215 *
216 * The out_values is modified only if a valid u8 value can be decoded.
217 */
218int of_property_read_variable_u8_array(const struct device_node *np,
219 const char *propname, u8 *out_values,
220 size_t sz_min, size_t sz_max)
221{
222 size_t sz, count;
223 const u8 *val = of_find_property_value_of_size(np, propname,
224 min: (sz_min * sizeof(*out_values)),
225 max: (sz_max * sizeof(*out_values)),
226 len: &sz);
227
228 if (IS_ERR(ptr: val))
229 return PTR_ERR(ptr: val);
230
231 if (!sz_max)
232 sz = sz_min;
233 else
234 sz /= sizeof(*out_values);
235
236 count = sz;
237 while (count--)
238 *out_values++ = *val++;
239
240 return sz;
241}
242EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array);
243
244/**
245 * of_property_read_variable_u16_array - Find and read an array of u16 from a
246 * property, with bounds on the minimum and maximum array size.
247 *
248 * @np: device node from which the property value is to be read.
249 * @propname: name of the property to be searched.
250 * @out_values: pointer to found values.
251 * @sz_min: minimum number of array elements to read
252 * @sz_max: maximum number of array elements to read, if zero there is no
253 * upper limit on the number of elements in the dts entry but only
254 * sz_min will be read.
255 *
256 * Search for a property in a device node and read 16-bit value(s) from
257 * it.
258 *
259 * dts entry of array should be like:
260 * ``property = /bits/ 16 <0x5000 0x6000 0x7000>;``
261 *
262 * Return: The number of elements read on success, -EINVAL if the property
263 * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
264 * if the property data is smaller than sz_min or longer than sz_max.
265 *
266 * The out_values is modified only if a valid u16 value can be decoded.
267 */
268int of_property_read_variable_u16_array(const struct device_node *np,
269 const char *propname, u16 *out_values,
270 size_t sz_min, size_t sz_max)
271{
272 size_t sz, count;
273 const __be16 *val = of_find_property_value_of_size(np, propname,
274 min: (sz_min * sizeof(*out_values)),
275 max: (sz_max * sizeof(*out_values)),
276 len: &sz);
277
278 if (IS_ERR(ptr: val))
279 return PTR_ERR(ptr: val);
280
281 if (!sz_max)
282 sz = sz_min;
283 else
284 sz /= sizeof(*out_values);
285
286 count = sz;
287 while (count--)
288 *out_values++ = be16_to_cpup(p: val++);
289
290 return sz;
291}
292EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array);
293
294/**
295 * of_property_read_variable_u32_array - Find and read an array of 32 bit
296 * integers from a property, with bounds on the minimum and maximum array size.
297 *
298 * @np: device node from which the property value is to be read.
299 * @propname: name of the property to be searched.
300 * @out_values: pointer to return found values.
301 * @sz_min: minimum number of array elements to read
302 * @sz_max: maximum number of array elements to read, if zero there is no
303 * upper limit on the number of elements in the dts entry but only
304 * sz_min will be read.
305 *
306 * Search for a property in a device node and read 32-bit value(s) from
307 * it.
308 *
309 * Return: The number of elements read on success, -EINVAL if the property
310 * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
311 * if the property data is smaller than sz_min or longer than sz_max.
312 *
313 * The out_values is modified only if a valid u32 value can be decoded.
314 */
315int of_property_read_variable_u32_array(const struct device_node *np,
316 const char *propname, u32 *out_values,
317 size_t sz_min, size_t sz_max)
318{
319 size_t sz, count;
320 const __be32 *val = of_find_property_value_of_size(np, propname,
321 min: (sz_min * sizeof(*out_values)),
322 max: (sz_max * sizeof(*out_values)),
323 len: &sz);
324
325 if (IS_ERR(ptr: val))
326 return PTR_ERR(ptr: val);
327
328 if (!sz_max)
329 sz = sz_min;
330 else
331 sz /= sizeof(*out_values);
332
333 count = sz;
334 while (count--)
335 *out_values++ = be32_to_cpup(p: val++);
336
337 return sz;
338}
339EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array);
340
341/**
342 * of_property_read_u64 - Find and read a 64 bit integer from a property
343 * @np: device node from which the property value is to be read.
344 * @propname: name of the property to be searched.
345 * @out_value: pointer to return value, modified only if return value is 0.
346 *
347 * Search for a property in a device node and read a 64-bit value from
348 * it.
349 *
350 * Return: 0 on success, -EINVAL if the property does not exist,
351 * -ENODATA if property does not have a value, and -EOVERFLOW if the
352 * property data isn't large enough.
353 *
354 * The out_value is modified only if a valid u64 value can be decoded.
355 */
356int of_property_read_u64(const struct device_node *np, const char *propname,
357 u64 *out_value)
358{
359 const __be32 *val = of_find_property_value_of_size(np, propname,
360 min: sizeof(*out_value),
361 max: 0,
362 NULL);
363
364 if (IS_ERR(ptr: val))
365 return PTR_ERR(ptr: val);
366
367 *out_value = of_read_number(cell: val, size: 2);
368 return 0;
369}
370EXPORT_SYMBOL_GPL(of_property_read_u64);
371
372/**
373 * of_property_read_variable_u64_array - Find and read an array of 64 bit
374 * integers from a property, with bounds on the minimum and maximum array size.
375 *
376 * @np: device node from which the property value is to be read.
377 * @propname: name of the property to be searched.
378 * @out_values: pointer to found values.
379 * @sz_min: minimum number of array elements to read
380 * @sz_max: maximum number of array elements to read, if zero there is no
381 * upper limit on the number of elements in the dts entry but only
382 * sz_min will be read.
383 *
384 * Search for a property in a device node and read 64-bit value(s) from
385 * it.
386 *
387 * Return: The number of elements read on success, -EINVAL if the property
388 * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
389 * if the property data is smaller than sz_min or longer than sz_max.
390 *
391 * The out_values is modified only if a valid u64 value can be decoded.
392 */
393int of_property_read_variable_u64_array(const struct device_node *np,
394 const char *propname, u64 *out_values,
395 size_t sz_min, size_t sz_max)
396{
397 size_t sz, count;
398 const __be32 *val = of_find_property_value_of_size(np, propname,
399 min: (sz_min * sizeof(*out_values)),
400 max: (sz_max * sizeof(*out_values)),
401 len: &sz);
402
403 if (IS_ERR(ptr: val))
404 return PTR_ERR(ptr: val);
405
406 if (!sz_max)
407 sz = sz_min;
408 else
409 sz /= sizeof(*out_values);
410
411 count = sz;
412 while (count--) {
413 *out_values++ = of_read_number(cell: val, size: 2);
414 val += 2;
415 }
416
417 return sz;
418}
419EXPORT_SYMBOL_GPL(of_property_read_variable_u64_array);
420
421/**
422 * of_property_read_string - Find and read a string from a property
423 * @np: device node from which the property value is to be read.
424 * @propname: name of the property to be searched.
425 * @out_string: pointer to null terminated return string, modified only if
426 * return value is 0.
427 *
428 * Search for a property in a device tree node and retrieve a null
429 * terminated string value (pointer to data, not a copy).
430 *
431 * Return: 0 on success, -EINVAL if the property does not exist, -ENODATA if
432 * property does not have a value, and -EILSEQ if the string is not
433 * null-terminated within the length of the property data.
434 *
435 * Note that the empty string "" has length of 1, thus -ENODATA cannot
436 * be interpreted as an empty string.
437 *
438 * The out_string pointer is modified only if a valid string can be decoded.
439 */
440int of_property_read_string(const struct device_node *np, const char *propname,
441 const char **out_string)
442{
443 const struct property *prop = of_find_property(np, name: propname, NULL);
444 if (!prop)
445 return -EINVAL;
446 if (!prop->length)
447 return -ENODATA;
448 if (strnlen(p: prop->value, maxlen: prop->length) >= prop->length)
449 return -EILSEQ;
450 *out_string = prop->value;
451 return 0;
452}
453EXPORT_SYMBOL_GPL(of_property_read_string);
454
455/**
456 * of_property_match_string() - Find string in a list and return index
457 * @np: pointer to node containing string list property
458 * @propname: string list property name
459 * @string: pointer to string to search for in string list
460 *
461 * This function searches a string list property and returns the index
462 * of a specific string value.
463 */
464int of_property_match_string(const struct device_node *np, const char *propname,
465 const char *string)
466{
467 const struct property *prop = of_find_property(np, name: propname, NULL);
468 size_t l;
469 int i;
470 const char *p, *end;
471
472 if (!prop)
473 return -EINVAL;
474 if (!prop->value)
475 return -ENODATA;
476
477 p = prop->value;
478 end = p + prop->length;
479
480 for (i = 0; p < end; i++, p += l) {
481 l = strnlen(p, maxlen: end - p) + 1;
482 if (p + l > end)
483 return -EILSEQ;
484 pr_debug("comparing %s with %s\n", string, p);
485 if (strcmp(string, p) == 0)
486 return i; /* Found it; return index */
487 }
488 return -ENODATA;
489}
490EXPORT_SYMBOL_GPL(of_property_match_string);
491
492/**
493 * of_property_read_string_helper() - Utility helper for parsing string properties
494 * @np: device node from which the property value is to be read.
495 * @propname: name of the property to be searched.
496 * @out_strs: output array of string pointers.
497 * @sz: number of array elements to read.
498 * @skip: Number of strings to skip over at beginning of list.
499 *
500 * Don't call this function directly. It is a utility helper for the
501 * of_property_read_string*() family of functions.
502 */
503int of_property_read_string_helper(const struct device_node *np,
504 const char *propname, const char **out_strs,
505 size_t sz, int skip)
506{
507 const struct property *prop = of_find_property(np, name: propname, NULL);
508 int l = 0, i = 0;
509 const char *p, *end;
510
511 if (!prop)
512 return -EINVAL;
513 if (!prop->value)
514 return -ENODATA;
515 p = prop->value;
516 end = p + prop->length;
517
518 for (i = 0; p < end && (!out_strs || i < skip + sz); i++, p += l) {
519 l = strnlen(p, maxlen: end - p) + 1;
520 if (p + l > end)
521 return -EILSEQ;
522 if (out_strs && i >= skip)
523 *out_strs++ = p;
524 }
525 i -= skip;
526 return i <= 0 ? -ENODATA : i;
527}
528EXPORT_SYMBOL_GPL(of_property_read_string_helper);
529
530const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
531 u32 *pu)
532{
533 const void *curv = cur;
534
535 if (!prop)
536 return NULL;
537
538 if (!cur) {
539 curv = prop->value;
540 goto out_val;
541 }
542
543 curv += sizeof(*cur);
544 if (curv >= prop->value + prop->length)
545 return NULL;
546
547out_val:
548 *pu = be32_to_cpup(p: curv);
549 return curv;
550}
551EXPORT_SYMBOL_GPL(of_prop_next_u32);
552
553const char *of_prop_next_string(struct property *prop, const char *cur)
554{
555 const void *curv = cur;
556
557 if (!prop)
558 return NULL;
559
560 if (!cur)
561 return prop->value;
562
563 curv += strlen(cur) + 1;
564 if (curv >= prop->value + prop->length)
565 return NULL;
566
567 return curv;
568}
569EXPORT_SYMBOL_GPL(of_prop_next_string);
570
571/**
572 * of_graph_parse_endpoint() - parse common endpoint node properties
573 * @node: pointer to endpoint device_node
574 * @endpoint: pointer to the OF endpoint data structure
575 *
576 * The caller should hold a reference to @node.
577 */
578int of_graph_parse_endpoint(const struct device_node *node,
579 struct of_endpoint *endpoint)
580{
581 struct device_node *port_node = of_get_parent(node);
582
583 WARN_ONCE(!port_node, "%s(): endpoint %pOF has no parent node\n",
584 __func__, node);
585
586 memset(endpoint, 0, sizeof(*endpoint));
587
588 endpoint->local_node = node;
589 /*
590 * It doesn't matter whether the two calls below succeed.
591 * If they don't then the default value 0 is used.
592 */
593 of_property_read_u32(np: port_node, propname: "reg", out_value: &endpoint->port);
594 of_property_read_u32(np: node, propname: "reg", out_value: &endpoint->id);
595
596 of_node_put(node: port_node);
597
598 return 0;
599}
600EXPORT_SYMBOL(of_graph_parse_endpoint);
601
602/**
603 * of_graph_get_port_by_id() - get the port matching a given id
604 * @parent: pointer to the parent device node
605 * @id: id of the port
606 *
607 * Return: A 'port' node pointer with refcount incremented. The caller
608 * has to use of_node_put() on it when done.
609 */
610struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id)
611{
612 struct device_node *node, *port;
613
614 node = of_get_child_by_name(node: parent, name: "ports");
615 if (node)
616 parent = node;
617
618 for_each_child_of_node(parent, port) {
619 u32 port_id = 0;
620
621 if (!of_node_name_eq(np: port, name: "port"))
622 continue;
623 of_property_read_u32(np: port, propname: "reg", out_value: &port_id);
624 if (id == port_id)
625 break;
626 }
627
628 of_node_put(node);
629
630 return port;
631}
632EXPORT_SYMBOL(of_graph_get_port_by_id);
633
634/**
635 * of_graph_get_next_endpoint() - get next endpoint node
636 * @parent: pointer to the parent device node
637 * @prev: previous endpoint node, or NULL to get first
638 *
639 * Return: An 'endpoint' node pointer with refcount incremented. Refcount
640 * of the passed @prev node is decremented.
641 */
642struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
643 struct device_node *prev)
644{
645 struct device_node *endpoint;
646 struct device_node *port;
647
648 if (!parent)
649 return NULL;
650
651 /*
652 * Start by locating the port node. If no previous endpoint is specified
653 * search for the first port node, otherwise get the previous endpoint
654 * parent port node.
655 */
656 if (!prev) {
657 struct device_node *node;
658
659 node = of_get_child_by_name(node: parent, name: "ports");
660 if (node)
661 parent = node;
662
663 port = of_get_child_by_name(node: parent, name: "port");
664 of_node_put(node);
665
666 if (!port) {
667 pr_err("graph: no port node found in %pOF\n", parent);
668 return NULL;
669 }
670 } else {
671 port = of_get_parent(node: prev);
672 if (WARN_ONCE(!port, "%s(): endpoint %pOF has no parent node\n",
673 __func__, prev))
674 return NULL;
675 }
676
677 while (1) {
678 /*
679 * Now that we have a port node, get the next endpoint by
680 * getting the next child. If the previous endpoint is NULL this
681 * will return the first child.
682 */
683 endpoint = of_get_next_child(node: port, prev);
684 if (endpoint) {
685 of_node_put(node: port);
686 return endpoint;
687 }
688
689 /* No more endpoints under this port, try the next one. */
690 prev = NULL;
691
692 do {
693 port = of_get_next_child(node: parent, prev: port);
694 if (!port)
695 return NULL;
696 } while (!of_node_name_eq(np: port, name: "port"));
697 }
698}
699EXPORT_SYMBOL(of_graph_get_next_endpoint);
700
701/**
702 * of_graph_get_endpoint_by_regs() - get endpoint node of specific identifiers
703 * @parent: pointer to the parent device node
704 * @port_reg: identifier (value of reg property) of the parent port node
705 * @reg: identifier (value of reg property) of the endpoint node
706 *
707 * Return: An 'endpoint' node pointer which is identified by reg and at the same
708 * is the child of a port node identified by port_reg. reg and port_reg are
709 * ignored when they are -1. Use of_node_put() on the pointer when done.
710 */
711struct device_node *of_graph_get_endpoint_by_regs(
712 const struct device_node *parent, int port_reg, int reg)
713{
714 struct of_endpoint endpoint;
715 struct device_node *node = NULL;
716
717 for_each_endpoint_of_node(parent, node) {
718 of_graph_parse_endpoint(node, &endpoint);
719 if (((port_reg == -1) || (endpoint.port == port_reg)) &&
720 ((reg == -1) || (endpoint.id == reg)))
721 return node;
722 }
723
724 return NULL;
725}
726EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
727
728/**
729 * of_graph_get_remote_endpoint() - get remote endpoint node
730 * @node: pointer to a local endpoint device_node
731 *
732 * Return: Remote endpoint node associated with remote endpoint node linked
733 * to @node. Use of_node_put() on it when done.
734 */
735struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
736{
737 /* Get remote endpoint node. */
738 return of_parse_phandle(np: node, phandle_name: "remote-endpoint", index: 0);
739}
740EXPORT_SYMBOL(of_graph_get_remote_endpoint);
741
742/**
743 * of_graph_get_port_parent() - get port's parent node
744 * @node: pointer to a local endpoint device_node
745 *
746 * Return: device node associated with endpoint node linked
747 * to @node. Use of_node_put() on it when done.
748 */
749struct device_node *of_graph_get_port_parent(struct device_node *node)
750{
751 unsigned int depth;
752
753 if (!node)
754 return NULL;
755
756 /*
757 * Preserve usecount for passed in node as of_get_next_parent()
758 * will do of_node_put() on it.
759 */
760 of_node_get(node);
761
762 /* Walk 3 levels up only if there is 'ports' node. */
763 for (depth = 3; depth && node; depth--) {
764 node = of_get_next_parent(node);
765 if (depth == 2 && !of_node_name_eq(np: node, name: "ports"))
766 break;
767 }
768 return node;
769}
770EXPORT_SYMBOL(of_graph_get_port_parent);
771
772/**
773 * of_graph_get_remote_port_parent() - get remote port's parent node
774 * @node: pointer to a local endpoint device_node
775 *
776 * Return: Remote device node associated with remote endpoint node linked
777 * to @node. Use of_node_put() on it when done.
778 */
779struct device_node *of_graph_get_remote_port_parent(
780 const struct device_node *node)
781{
782 struct device_node *np, *pp;
783
784 /* Get remote endpoint node. */
785 np = of_graph_get_remote_endpoint(node);
786
787 pp = of_graph_get_port_parent(np);
788
789 of_node_put(node: np);
790
791 return pp;
792}
793EXPORT_SYMBOL(of_graph_get_remote_port_parent);
794
795/**
796 * of_graph_get_remote_port() - get remote port node
797 * @node: pointer to a local endpoint device_node
798 *
799 * Return: Remote port node associated with remote endpoint node linked
800 * to @node. Use of_node_put() on it when done.
801 */
802struct device_node *of_graph_get_remote_port(const struct device_node *node)
803{
804 struct device_node *np;
805
806 /* Get remote endpoint node. */
807 np = of_graph_get_remote_endpoint(node);
808 if (!np)
809 return NULL;
810 return of_get_next_parent(node: np);
811}
812EXPORT_SYMBOL(of_graph_get_remote_port);
813
814int of_graph_get_endpoint_count(const struct device_node *np)
815{
816 struct device_node *endpoint;
817 int num = 0;
818
819 for_each_endpoint_of_node(np, endpoint)
820 num++;
821
822 return num;
823}
824EXPORT_SYMBOL(of_graph_get_endpoint_count);
825
826/**
827 * of_graph_get_remote_node() - get remote parent device_node for given port/endpoint
828 * @node: pointer to parent device_node containing graph port/endpoint
829 * @port: identifier (value of reg property) of the parent port node
830 * @endpoint: identifier (value of reg property) of the endpoint node
831 *
832 * Return: Remote device node associated with remote endpoint node linked
833 * to @node. Use of_node_put() on it when done.
834 */
835struct device_node *of_graph_get_remote_node(const struct device_node *node,
836 u32 port, u32 endpoint)
837{
838 struct device_node *endpoint_node, *remote;
839
840 endpoint_node = of_graph_get_endpoint_by_regs(node, port, endpoint);
841 if (!endpoint_node) {
842 pr_debug("no valid endpoint (%d, %d) for node %pOF\n",
843 port, endpoint, node);
844 return NULL;
845 }
846
847 remote = of_graph_get_remote_port_parent(endpoint_node);
848 of_node_put(node: endpoint_node);
849 if (!remote) {
850 pr_debug("no valid remote node\n");
851 return NULL;
852 }
853
854 if (!of_device_is_available(device: remote)) {
855 pr_debug("not available for remote node\n");
856 of_node_put(node: remote);
857 return NULL;
858 }
859
860 return remote;
861}
862EXPORT_SYMBOL(of_graph_get_remote_node);
863
864static struct fwnode_handle *of_fwnode_get(struct fwnode_handle *fwnode)
865{
866 return of_fwnode_handle(of_node_get(to_of_node(fwnode)));
867}
868
869static void of_fwnode_put(struct fwnode_handle *fwnode)
870{
871 of_node_put(to_of_node(fwnode));
872}
873
874static bool of_fwnode_device_is_available(const struct fwnode_handle *fwnode)
875{
876 return of_device_is_available(to_of_node(fwnode));
877}
878
879static bool of_fwnode_device_dma_supported(const struct fwnode_handle *fwnode)
880{
881 return true;
882}
883
884static enum dev_dma_attr
885of_fwnode_device_get_dma_attr(const struct fwnode_handle *fwnode)
886{
887 if (of_dma_is_coherent(to_of_node(fwnode)))
888 return DEV_DMA_COHERENT;
889 else
890 return DEV_DMA_NON_COHERENT;
891}
892
893static bool of_fwnode_property_present(const struct fwnode_handle *fwnode,
894 const char *propname)
895{
896 return of_property_read_bool(to_of_node(fwnode), propname);
897}
898
899static int of_fwnode_property_read_int_array(const struct fwnode_handle *fwnode,
900 const char *propname,
901 unsigned int elem_size, void *val,
902 size_t nval)
903{
904 const struct device_node *node = to_of_node(fwnode);
905
906 if (!val)
907 return of_property_count_elems_of_size(node, propname,
908 elem_size);
909
910 switch (elem_size) {
911 case sizeof(u8):
912 return of_property_read_u8_array(np: node, propname, out_values: val, sz: nval);
913 case sizeof(u16):
914 return of_property_read_u16_array(np: node, propname, out_values: val, sz: nval);
915 case sizeof(u32):
916 return of_property_read_u32_array(np: node, propname, out_values: val, sz: nval);
917 case sizeof(u64):
918 return of_property_read_u64_array(np: node, propname, out_values: val, sz: nval);
919 }
920
921 return -ENXIO;
922}
923
924static int
925of_fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
926 const char *propname, const char **val,
927 size_t nval)
928{
929 const struct device_node *node = to_of_node(fwnode);
930
931 return val ?
932 of_property_read_string_array(np: node, propname, out_strs: val, sz: nval) :
933 of_property_count_strings(np: node, propname);
934}
935
936static const char *of_fwnode_get_name(const struct fwnode_handle *fwnode)
937{
938 return kbasename(to_of_node(fwnode)->full_name);
939}
940
941static const char *of_fwnode_get_name_prefix(const struct fwnode_handle *fwnode)
942{
943 /* Root needs no prefix here (its name is "/"). */
944 if (!to_of_node(fwnode)->parent)
945 return "";
946
947 return "/";
948}
949
950static struct fwnode_handle *
951of_fwnode_get_parent(const struct fwnode_handle *fwnode)
952{
953 return of_fwnode_handle(of_get_parent(to_of_node(fwnode)));
954}
955
956static struct fwnode_handle *
957of_fwnode_get_next_child_node(const struct fwnode_handle *fwnode,
958 struct fwnode_handle *child)
959{
960 return of_fwnode_handle(of_get_next_available_child(to_of_node(fwnode),
961 to_of_node(child)));
962}
963
964static struct fwnode_handle *
965of_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
966 const char *childname)
967{
968 const struct device_node *node = to_of_node(fwnode);
969 struct device_node *child;
970
971 for_each_available_child_of_node(node, child)
972 if (of_node_name_eq(np: child, name: childname))
973 return of_fwnode_handle(child);
974
975 return NULL;
976}
977
978static int
979of_fwnode_get_reference_args(const struct fwnode_handle *fwnode,
980 const char *prop, const char *nargs_prop,
981 unsigned int nargs, unsigned int index,
982 struct fwnode_reference_args *args)
983{
984 struct of_phandle_args of_args;
985 unsigned int i;
986 int ret;
987
988 if (nargs_prop)
989 ret = of_parse_phandle_with_args(to_of_node(fwnode), list_name: prop,
990 cells_name: nargs_prop, index, out_args: &of_args);
991 else
992 ret = of_parse_phandle_with_fixed_args(to_of_node(fwnode), list_name: prop,
993 cell_count: nargs, index, out_args: &of_args);
994 if (ret < 0)
995 return ret;
996 if (!args) {
997 of_node_put(node: of_args.np);
998 return 0;
999 }
1000
1001 args->nargs = of_args.args_count;
1002 args->fwnode = of_fwnode_handle(of_args.np);
1003
1004 for (i = 0; i < NR_FWNODE_REFERENCE_ARGS; i++)
1005 args->args[i] = i < of_args.args_count ? of_args.args[i] : 0;
1006
1007 return 0;
1008}
1009
1010static struct fwnode_handle *
1011of_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode,
1012 struct fwnode_handle *prev)
1013{
1014 return of_fwnode_handle(of_graph_get_next_endpoint(to_of_node(fwnode),
1015 to_of_node(prev)));
1016}
1017
1018static struct fwnode_handle *
1019of_fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode)
1020{
1021 return of_fwnode_handle(
1022 of_graph_get_remote_endpoint(to_of_node(fwnode)));
1023}
1024
1025static struct fwnode_handle *
1026of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode)
1027{
1028 struct device_node *np;
1029
1030 /* Get the parent of the port */
1031 np = of_get_parent(to_of_node(fwnode));
1032 if (!np)
1033 return NULL;
1034
1035 /* Is this the "ports" node? If not, it's the port parent. */
1036 if (!of_node_name_eq(np, name: "ports"))
1037 return of_fwnode_handle(np);
1038
1039 return of_fwnode_handle(of_get_next_parent(np));
1040}
1041
1042static int of_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
1043 struct fwnode_endpoint *endpoint)
1044{
1045 const struct device_node *node = to_of_node(fwnode);
1046 struct device_node *port_node = of_get_parent(node);
1047
1048 endpoint->local_fwnode = fwnode;
1049
1050 of_property_read_u32(np: port_node, propname: "reg", out_value: &endpoint->port);
1051 of_property_read_u32(np: node, propname: "reg", out_value: &endpoint->id);
1052
1053 of_node_put(node: port_node);
1054
1055 return 0;
1056}
1057
1058static const void *
1059of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
1060 const struct device *dev)
1061{
1062 return of_device_get_match_data(dev);
1063}
1064
1065static struct device_node *of_get_compat_node(struct device_node *np)
1066{
1067 of_node_get(node: np);
1068
1069 while (np) {
1070 if (!of_device_is_available(device: np)) {
1071 of_node_put(node: np);
1072 np = NULL;
1073 }
1074
1075 if (of_property_present(np, propname: "compatible"))
1076 break;
1077
1078 np = of_get_next_parent(node: np);
1079 }
1080
1081 return np;
1082}
1083
1084static struct device_node *of_get_compat_node_parent(struct device_node *np)
1085{
1086 struct device_node *parent, *node;
1087
1088 parent = of_get_parent(node: np);
1089 node = of_get_compat_node(np: parent);
1090 of_node_put(node: parent);
1091
1092 return node;
1093}
1094
1095static void of_link_to_phandle(struct device_node *con_np,
1096 struct device_node *sup_np)
1097{
1098 struct device_node *tmp_np = of_node_get(node: sup_np);
1099
1100 /* Check that sup_np and its ancestors are available. */
1101 while (tmp_np) {
1102 if (of_fwnode_handle(tmp_np)->dev) {
1103 of_node_put(node: tmp_np);
1104 break;
1105 }
1106
1107 if (!of_device_is_available(device: tmp_np)) {
1108 of_node_put(node: tmp_np);
1109 return;
1110 }
1111
1112 tmp_np = of_get_next_parent(node: tmp_np);
1113 }
1114
1115 fwnode_link_add(of_fwnode_handle(con_np), of_fwnode_handle(sup_np));
1116}
1117
1118/**
1119 * parse_prop_cells - Property parsing function for suppliers
1120 *
1121 * @np: Pointer to device tree node containing a list
1122 * @prop_name: Name of property to be parsed. Expected to hold phandle values
1123 * @index: For properties holding a list of phandles, this is the index
1124 * into the list.
1125 * @list_name: Property name that is known to contain list of phandle(s) to
1126 * supplier(s)
1127 * @cells_name: property name that specifies phandles' arguments count
1128 *
1129 * This is a helper function to parse properties that have a known fixed name
1130 * and are a list of phandles and phandle arguments.
1131 *
1132 * Returns:
1133 * - phandle node pointer with refcount incremented. Caller must of_node_put()
1134 * on it when done.
1135 * - NULL if no phandle found at index
1136 */
1137static struct device_node *parse_prop_cells(struct device_node *np,
1138 const char *prop_name, int index,
1139 const char *list_name,
1140 const char *cells_name)
1141{
1142 struct of_phandle_args sup_args;
1143
1144 if (strcmp(prop_name, list_name))
1145 return NULL;
1146
1147 if (__of_parse_phandle_with_args(np, list_name, cells_name, cell_count: 0, index,
1148 out_args: &sup_args))
1149 return NULL;
1150
1151 return sup_args.np;
1152}
1153
1154#define DEFINE_SIMPLE_PROP(fname, name, cells) \
1155static struct device_node *parse_##fname(struct device_node *np, \
1156 const char *prop_name, int index) \
1157{ \
1158 return parse_prop_cells(np, prop_name, index, name, cells); \
1159}
1160
1161static int strcmp_suffix(const char *str, const char *suffix)
1162{
1163 unsigned int len, suffix_len;
1164
1165 len = strlen(str);
1166 suffix_len = strlen(suffix);
1167 if (len <= suffix_len)
1168 return -1;
1169 return strcmp(str + len - suffix_len, suffix);
1170}
1171
1172/**
1173 * parse_suffix_prop_cells - Suffix property parsing function for suppliers
1174 *
1175 * @np: Pointer to device tree node containing a list
1176 * @prop_name: Name of property to be parsed. Expected to hold phandle values
1177 * @index: For properties holding a list of phandles, this is the index
1178 * into the list.
1179 * @suffix: Property suffix that is known to contain list of phandle(s) to
1180 * supplier(s)
1181 * @cells_name: property name that specifies phandles' arguments count
1182 *
1183 * This is a helper function to parse properties that have a known fixed suffix
1184 * and are a list of phandles and phandle arguments.
1185 *
1186 * Returns:
1187 * - phandle node pointer with refcount incremented. Caller must of_node_put()
1188 * on it when done.
1189 * - NULL if no phandle found at index
1190 */
1191static struct device_node *parse_suffix_prop_cells(struct device_node *np,
1192 const char *prop_name, int index,
1193 const char *suffix,
1194 const char *cells_name)
1195{
1196 struct of_phandle_args sup_args;
1197
1198 if (strcmp_suffix(str: prop_name, suffix))
1199 return NULL;
1200
1201 if (of_parse_phandle_with_args(np, list_name: prop_name, cells_name, index,
1202 out_args: &sup_args))
1203 return NULL;
1204
1205 return sup_args.np;
1206}
1207
1208#define DEFINE_SUFFIX_PROP(fname, suffix, cells) \
1209static struct device_node *parse_##fname(struct device_node *np, \
1210 const char *prop_name, int index) \
1211{ \
1212 return parse_suffix_prop_cells(np, prop_name, index, suffix, cells); \
1213}
1214
1215/**
1216 * struct supplier_bindings - Property parsing functions for suppliers
1217 *
1218 * @parse_prop: function name
1219 * parse_prop() finds the node corresponding to a supplier phandle
1220 * @parse_prop.np: Pointer to device node holding supplier phandle property
1221 * @parse_prop.prop_name: Name of property holding a phandle value
1222 * @parse_prop.index: For properties holding a list of phandles, this is the
1223 * index into the list
1224 * @optional: Describes whether a supplier is mandatory or not
1225 * @node_not_dev: The consumer node containing the property is never converted
1226 * to a struct device. Instead, parse ancestor nodes for the
1227 * compatible property to find a node corresponding to a device.
1228 *
1229 * Returns:
1230 * parse_prop() return values are
1231 * - phandle node pointer with refcount incremented. Caller must of_node_put()
1232 * on it when done.
1233 * - NULL if no phandle found at index
1234 */
1235struct supplier_bindings {
1236 struct device_node *(*parse_prop)(struct device_node *np,
1237 const char *prop_name, int index);
1238 bool optional;
1239 bool node_not_dev;
1240};
1241
1242DEFINE_SIMPLE_PROP(clocks, "clocks", "#clock-cells")
1243DEFINE_SIMPLE_PROP(interconnects, "interconnects", "#interconnect-cells")
1244DEFINE_SIMPLE_PROP(iommus, "iommus", "#iommu-cells")
1245DEFINE_SIMPLE_PROP(mboxes, "mboxes", "#mbox-cells")
1246DEFINE_SIMPLE_PROP(io_channels, "io-channel", "#io-channel-cells")
1247DEFINE_SIMPLE_PROP(interrupt_parent, "interrupt-parent", NULL)
1248DEFINE_SIMPLE_PROP(dmas, "dmas", "#dma-cells")
1249DEFINE_SIMPLE_PROP(power_domains, "power-domains", "#power-domain-cells")
1250DEFINE_SIMPLE_PROP(hwlocks, "hwlocks", "#hwlock-cells")
1251DEFINE_SIMPLE_PROP(extcon, "extcon", NULL)
1252DEFINE_SIMPLE_PROP(nvmem_cells, "nvmem-cells", "#nvmem-cell-cells")
1253DEFINE_SIMPLE_PROP(phys, "phys", "#phy-cells")
1254DEFINE_SIMPLE_PROP(wakeup_parent, "wakeup-parent", NULL)
1255DEFINE_SIMPLE_PROP(pinctrl0, "pinctrl-0", NULL)
1256DEFINE_SIMPLE_PROP(pinctrl1, "pinctrl-1", NULL)
1257DEFINE_SIMPLE_PROP(pinctrl2, "pinctrl-2", NULL)
1258DEFINE_SIMPLE_PROP(pinctrl3, "pinctrl-3", NULL)
1259DEFINE_SIMPLE_PROP(pinctrl4, "pinctrl-4", NULL)
1260DEFINE_SIMPLE_PROP(pinctrl5, "pinctrl-5", NULL)
1261DEFINE_SIMPLE_PROP(pinctrl6, "pinctrl-6", NULL)
1262DEFINE_SIMPLE_PROP(pinctrl7, "pinctrl-7", NULL)
1263DEFINE_SIMPLE_PROP(pinctrl8, "pinctrl-8", NULL)
1264DEFINE_SIMPLE_PROP(remote_endpoint, "remote-endpoint", NULL)
1265DEFINE_SIMPLE_PROP(pwms, "pwms", "#pwm-cells")
1266DEFINE_SIMPLE_PROP(resets, "resets", "#reset-cells")
1267DEFINE_SIMPLE_PROP(leds, "leds", NULL)
1268DEFINE_SIMPLE_PROP(backlight, "backlight", NULL)
1269DEFINE_SIMPLE_PROP(panel, "panel", NULL)
1270DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
1271DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
1272
1273static struct device_node *parse_gpios(struct device_node *np,
1274 const char *prop_name, int index)
1275{
1276 if (!strcmp_suffix(str: prop_name, suffix: ",nr-gpios"))
1277 return NULL;
1278
1279 return parse_suffix_prop_cells(np, prop_name, index, suffix: "-gpios",
1280 cells_name: "#gpio-cells");
1281}
1282
1283static struct device_node *parse_iommu_maps(struct device_node *np,
1284 const char *prop_name, int index)
1285{
1286 if (strcmp(prop_name, "iommu-map"))
1287 return NULL;
1288
1289 return of_parse_phandle(np, phandle_name: prop_name, index: (index * 4) + 1);
1290}
1291
1292static struct device_node *parse_gpio_compat(struct device_node *np,
1293 const char *prop_name, int index)
1294{
1295 struct of_phandle_args sup_args;
1296
1297 if (strcmp(prop_name, "gpio") && strcmp(prop_name, "gpios"))
1298 return NULL;
1299
1300 /*
1301 * Ignore node with gpio-hog property since its gpios are all provided
1302 * by its parent.
1303 */
1304 if (of_property_read_bool(np, propname: "gpio-hog"))
1305 return NULL;
1306
1307 if (of_parse_phandle_with_args(np, list_name: prop_name, cells_name: "#gpio-cells", index,
1308 out_args: &sup_args))
1309 return NULL;
1310
1311 return sup_args.np;
1312}
1313
1314static struct device_node *parse_interrupts(struct device_node *np,
1315 const char *prop_name, int index)
1316{
1317 struct of_phandle_args sup_args;
1318
1319 if (!IS_ENABLED(CONFIG_OF_IRQ) || IS_ENABLED(CONFIG_PPC))
1320 return NULL;
1321
1322 if (strcmp(prop_name, "interrupts") &&
1323 strcmp(prop_name, "interrupts-extended"))
1324 return NULL;
1325
1326 return of_irq_parse_one(device: np, index, out_irq: &sup_args) ? NULL : sup_args.np;
1327}
1328
1329static const struct supplier_bindings of_supplier_bindings[] = {
1330 { .parse_prop = parse_clocks, },
1331 { .parse_prop = parse_interconnects, },
1332 { .parse_prop = parse_iommus, .optional = true, },
1333 { .parse_prop = parse_iommu_maps, .optional = true, },
1334 { .parse_prop = parse_mboxes, },
1335 { .parse_prop = parse_io_channels, },
1336 { .parse_prop = parse_interrupt_parent, },
1337 { .parse_prop = parse_dmas, .optional = true, },
1338 { .parse_prop = parse_power_domains, },
1339 { .parse_prop = parse_hwlocks, },
1340 { .parse_prop = parse_extcon, },
1341 { .parse_prop = parse_nvmem_cells, },
1342 { .parse_prop = parse_phys, },
1343 { .parse_prop = parse_wakeup_parent, },
1344 { .parse_prop = parse_pinctrl0, },
1345 { .parse_prop = parse_pinctrl1, },
1346 { .parse_prop = parse_pinctrl2, },
1347 { .parse_prop = parse_pinctrl3, },
1348 { .parse_prop = parse_pinctrl4, },
1349 { .parse_prop = parse_pinctrl5, },
1350 { .parse_prop = parse_pinctrl6, },
1351 { .parse_prop = parse_pinctrl7, },
1352 { .parse_prop = parse_pinctrl8, },
1353 { .parse_prop = parse_remote_endpoint, .node_not_dev = true, },
1354 { .parse_prop = parse_pwms, },
1355 { .parse_prop = parse_resets, },
1356 { .parse_prop = parse_leds, },
1357 { .parse_prop = parse_backlight, },
1358 { .parse_prop = parse_panel, },
1359 { .parse_prop = parse_gpio_compat, },
1360 { .parse_prop = parse_interrupts, },
1361 { .parse_prop = parse_regulators, },
1362 { .parse_prop = parse_gpio, },
1363 { .parse_prop = parse_gpios, },
1364 {}
1365};
1366
1367/**
1368 * of_link_property - Create device links to suppliers listed in a property
1369 * @con_np: The consumer device tree node which contains the property
1370 * @prop_name: Name of property to be parsed
1371 *
1372 * This function checks if the property @prop_name that is present in the
1373 * @con_np device tree node is one of the known common device tree bindings
1374 * that list phandles to suppliers. If @prop_name isn't one, this function
1375 * doesn't do anything.
1376 *
1377 * If @prop_name is one, this function attempts to create fwnode links from the
1378 * consumer device tree node @con_np to all the suppliers device tree nodes
1379 * listed in @prop_name.
1380 *
1381 * Any failed attempt to create a fwnode link will NOT result in an immediate
1382 * return. of_link_property() must create links to all the available supplier
1383 * device tree nodes even when attempts to create a link to one or more
1384 * suppliers fail.
1385 */
1386static int of_link_property(struct device_node *con_np, const char *prop_name)
1387{
1388 struct device_node *phandle;
1389 const struct supplier_bindings *s = of_supplier_bindings;
1390 unsigned int i = 0;
1391 bool matched = false;
1392
1393 /* Do not stop at first failed link, link all available suppliers. */
1394 while (!matched && s->parse_prop) {
1395 if (s->optional && !fw_devlink_is_strict()) {
1396 s++;
1397 continue;
1398 }
1399
1400 while ((phandle = s->parse_prop(con_np, prop_name, i))) {
1401 struct device_node *con_dev_np;
1402
1403 con_dev_np = s->node_not_dev
1404 ? of_get_compat_node_parent(np: con_np)
1405 : of_node_get(node: con_np);
1406 matched = true;
1407 i++;
1408 of_link_to_phandle(con_np: con_dev_np, sup_np: phandle);
1409 of_node_put(node: phandle);
1410 of_node_put(node: con_dev_np);
1411 }
1412 s++;
1413 }
1414 return 0;
1415}
1416
1417static void __iomem *of_fwnode_iomap(struct fwnode_handle *fwnode, int index)
1418{
1419#ifdef CONFIG_OF_ADDRESS
1420 return of_iomap(to_of_node(fwnode), index);
1421#else
1422 return NULL;
1423#endif
1424}
1425
1426static int of_fwnode_irq_get(const struct fwnode_handle *fwnode,
1427 unsigned int index)
1428{
1429 return of_irq_get(to_of_node(fwnode), index);
1430}
1431
1432static int of_fwnode_add_links(struct fwnode_handle *fwnode)
1433{
1434 struct property *p;
1435 struct device_node *con_np = to_of_node(fwnode);
1436
1437 if (IS_ENABLED(CONFIG_X86))
1438 return 0;
1439
1440 if (!con_np)
1441 return -EINVAL;
1442
1443 for_each_property_of_node(con_np, p)
1444 of_link_property(con_np, prop_name: p->name);
1445
1446 return 0;
1447}
1448
1449const struct fwnode_operations of_fwnode_ops = {
1450 .get = of_fwnode_get,
1451 .put = of_fwnode_put,
1452 .device_is_available = of_fwnode_device_is_available,
1453 .device_get_match_data = of_fwnode_device_get_match_data,
1454 .device_dma_supported = of_fwnode_device_dma_supported,
1455 .device_get_dma_attr = of_fwnode_device_get_dma_attr,
1456 .property_present = of_fwnode_property_present,
1457 .property_read_int_array = of_fwnode_property_read_int_array,
1458 .property_read_string_array = of_fwnode_property_read_string_array,
1459 .get_name = of_fwnode_get_name,
1460 .get_name_prefix = of_fwnode_get_name_prefix,
1461 .get_parent = of_fwnode_get_parent,
1462 .get_next_child_node = of_fwnode_get_next_child_node,
1463 .get_named_child_node = of_fwnode_get_named_child_node,
1464 .get_reference_args = of_fwnode_get_reference_args,
1465 .graph_get_next_endpoint = of_fwnode_graph_get_next_endpoint,
1466 .graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint,
1467 .graph_get_port_parent = of_fwnode_graph_get_port_parent,
1468 .graph_parse_endpoint = of_fwnode_graph_parse_endpoint,
1469 .iomap = of_fwnode_iomap,
1470 .irq_get = of_fwnode_irq_get,
1471 .add_links = of_fwnode_add_links,
1472};
1473EXPORT_SYMBOL_GPL(of_fwnode_ops);
1474

source code of linux/drivers/of/property.c