4 * Definitions for talking to the Open Firmware PROM on
5 * Power Macintosh and other computers.
7 * Copyright (C) 1996-2005 Paul Mackerras.
9 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
10 * Updates for SPARC64 by David S. Miller
11 * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
18 #include <linux/types.h>
19 #include <linux/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/kobject.h>
22 #include <linux/mod_devicetable.h>
23 #include <linux/spinlock.h>
24 #include <linux/topology.h>
25 #include <linux/notifier.h>
26 #include <linux/property.h>
27 #include <linux/list.h>
29 #include <asm/byteorder.h>
30 #include <asm/errno.h>
39 struct property *next;
41 unsigned int unique_id;
42 struct bin_attribute attr;
45 #if defined(CONFIG_SPARC)
46 struct of_irq_controller;
53 const char *full_name;
54 struct fwnode_handle fwnode;
56 struct property *properties;
57 struct property *deadprops; /* removed properties */
58 struct device_node *parent;
59 struct device_node *child;
60 struct device_node *sibling;
64 #if defined(CONFIG_SPARC)
65 const char *path_component_name;
66 unsigned int unique_id;
67 struct of_irq_controller *irq_trans;
71 #define MAX_PHANDLE_ARGS 16
72 struct of_phandle_args {
73 struct device_node *np;
75 uint32_t args[MAX_PHANDLE_ARGS];
78 struct of_phandle_iterator {
79 /* Common iterator information */
80 const char *cells_name;
82 const struct device_node *parent;
84 /* List size information */
85 const __be32 *list_end;
86 const __be32 *phandle_end;
88 /* Current position state */
92 struct device_node *node;
95 struct of_reconfig_data {
96 struct device_node *dn;
97 struct property *prop;
98 struct property *old_prop;
101 /* initialize a node */
102 extern struct kobj_type of_node_ktype;
103 static inline void of_node_init(struct device_node *node)
105 kobject_init(&node->kobj, &of_node_ktype);
106 node->fwnode.type = FWNODE_OF;
109 /* true when node is initialized */
110 static inline int of_node_is_initialized(struct device_node *node)
112 return node && node->kobj.state_initialized;
115 /* true when node is attached (i.e. present on sysfs) */
116 static inline int of_node_is_attached(struct device_node *node)
118 return node && node->kobj.state_in_sysfs;
121 #ifdef CONFIG_OF_DYNAMIC
122 extern struct device_node *of_node_get(struct device_node *node);
123 extern void of_node_put(struct device_node *node);
124 #else /* CONFIG_OF_DYNAMIC */
125 /* Dummy ref counting routines - to be implemented later */
126 static inline struct device_node *of_node_get(struct device_node *node)
130 static inline void of_node_put(struct device_node *node) { }
131 #endif /* !CONFIG_OF_DYNAMIC */
133 /* Pointer for first entry in chain of all nodes. */
134 extern struct device_node *of_root;
135 extern struct device_node *of_chosen;
136 extern struct device_node *of_aliases;
137 extern struct device_node *of_stdout;
138 extern raw_spinlock_t devtree_lock;
140 /* flag descriptions (need to be visible even when !CONFIG_OF) */
141 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
142 #define OF_DETACHED 2 /* node has been detached from the device tree */
143 #define OF_POPULATED 3 /* device already created for the node */
144 #define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */
146 #define OF_BAD_ADDR ((u64)-1)
149 void of_core_init(void);
151 static inline bool is_of_node(struct fwnode_handle *fwnode)
153 return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_OF;
156 static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
158 return is_of_node(fwnode) ?
159 container_of(fwnode, struct device_node, fwnode) : NULL;
162 static inline bool of_have_populated_dt(void)
164 return of_root != NULL;
167 static inline bool of_node_is_root(const struct device_node *node)
169 return node && (node->parent == NULL);
172 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
174 return test_bit(flag, &n->_flags);
177 static inline int of_node_test_and_set_flag(struct device_node *n,
180 return test_and_set_bit(flag, &n->_flags);
183 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
185 set_bit(flag, &n->_flags);
188 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
190 clear_bit(flag, &n->_flags);
193 static inline int of_property_check_flag(struct property *p, unsigned long flag)
195 return test_bit(flag, &p->_flags);
198 static inline void of_property_set_flag(struct property *p, unsigned long flag)
200 set_bit(flag, &p->_flags);
203 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
205 clear_bit(flag, &p->_flags);
208 extern struct device_node *__of_find_all_nodes(struct device_node *prev);
209 extern struct device_node *of_find_all_nodes(struct device_node *prev);
212 * OF address retrieval & translation
215 /* Helper to read a big number; size is in cells (not bytes) */
216 static inline u64 of_read_number(const __be32 *cell, int size)
220 r = (r << 32) | be32_to_cpu(*(cell++));
224 /* Like of_read_number, but we want an unsigned long result */
225 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
227 /* toss away upper bits if unsigned long is smaller than u64 */
228 return of_read_number(cell, size);
231 #if defined(CONFIG_SPARC)
232 #include <asm/prom.h>
235 /* Default #address and #size cells. Allow arch asm/prom.h to override */
236 #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
237 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
238 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
241 /* Default string compare functions, Allow arch asm/prom.h to override */
242 #if !defined(of_compat_cmp)
243 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
244 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
245 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
248 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
249 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
251 static inline const char *of_node_full_name(const struct device_node *np)
253 return np ? np->full_name : "<no-node>";
256 #define for_each_of_allnodes_from(from, dn) \
257 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
258 #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
259 extern struct device_node *of_find_node_by_name(struct device_node *from,
261 extern struct device_node *of_find_node_by_type(struct device_node *from,
263 extern struct device_node *of_find_compatible_node(struct device_node *from,
264 const char *type, const char *compat);
265 extern struct device_node *of_find_matching_node_and_match(
266 struct device_node *from,
267 const struct of_device_id *matches,
268 const struct of_device_id **match);
270 extern struct device_node *of_find_node_opts_by_path(const char *path,
272 static inline struct device_node *of_find_node_by_path(const char *path)
274 return of_find_node_opts_by_path(path, NULL);
277 extern struct device_node *of_find_node_by_phandle(phandle handle);
278 extern struct device_node *of_get_parent(const struct device_node *node);
279 extern struct device_node *of_get_next_parent(struct device_node *node);
280 extern struct device_node *of_get_next_child(const struct device_node *node,
281 struct device_node *prev);
282 extern struct device_node *of_get_next_available_child(
283 const struct device_node *node, struct device_node *prev);
285 extern struct device_node *of_get_child_by_name(const struct device_node *node,
289 extern struct device_node *of_find_next_cache_node(const struct device_node *);
290 extern struct device_node *of_find_node_with_property(
291 struct device_node *from, const char *prop_name);
293 extern struct property *of_find_property(const struct device_node *np,
296 extern int of_property_count_elems_of_size(const struct device_node *np,
297 const char *propname, int elem_size);
298 extern int of_property_read_u32_index(const struct device_node *np,
299 const char *propname,
300 u32 index, u32 *out_value);
301 extern int of_property_read_u8_array(const struct device_node *np,
302 const char *propname, u8 *out_values, size_t sz);
303 extern int of_property_read_u16_array(const struct device_node *np,
304 const char *propname, u16 *out_values, size_t sz);
305 extern int of_property_read_u32_array(const struct device_node *np,
306 const char *propname,
309 extern int of_property_read_u64(const struct device_node *np,
310 const char *propname, u64 *out_value);
311 extern int of_property_read_u64_array(const struct device_node *np,
312 const char *propname,
316 extern int of_property_read_string(const struct device_node *np,
317 const char *propname,
318 const char **out_string);
319 extern int of_property_match_string(const struct device_node *np,
320 const char *propname,
322 extern int of_property_read_string_helper(const struct device_node *np,
323 const char *propname,
324 const char **out_strs, size_t sz, int index);
325 extern int of_device_is_compatible(const struct device_node *device,
327 extern int of_device_compatible_match(struct device_node *device,
328 const char *const *compat);
329 extern bool of_device_is_available(const struct device_node *device);
330 extern bool of_device_is_big_endian(const struct device_node *device);
331 extern const void *of_get_property(const struct device_node *node,
334 extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
335 #define for_each_property_of_node(dn, pp) \
336 for (pp = dn->properties; pp != NULL; pp = pp->next)
338 extern int of_n_addr_cells(struct device_node *np);
339 extern int of_n_size_cells(struct device_node *np);
340 extern const struct of_device_id *of_match_node(
341 const struct of_device_id *matches, const struct device_node *node);
342 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
343 extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
344 extern struct device_node *of_parse_phandle(const struct device_node *np,
345 const char *phandle_name,
347 extern int of_parse_phandle_with_args(const struct device_node *np,
348 const char *list_name, const char *cells_name, int index,
349 struct of_phandle_args *out_args);
350 extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
351 const char *list_name, int cells_count, int index,
352 struct of_phandle_args *out_args);
353 extern int of_count_phandle_with_args(const struct device_node *np,
354 const char *list_name, const char *cells_name);
356 /* phandle iterator functions */
357 extern int of_phandle_iterator_init(struct of_phandle_iterator *it,
358 const struct device_node *np,
359 const char *list_name,
360 const char *cells_name,
363 extern int of_phandle_iterator_next(struct of_phandle_iterator *it);
364 extern int of_phandle_iterator_args(struct of_phandle_iterator *it,
368 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
369 extern int of_alias_get_id(struct device_node *np, const char *stem);
370 extern int of_alias_get_highest_id(const char *stem);
372 extern int of_machine_is_compatible(const char *compat);
374 extern int of_add_property(struct device_node *np, struct property *prop);
375 extern int of_remove_property(struct device_node *np, struct property *prop);
376 extern int of_update_property(struct device_node *np, struct property *newprop);
378 /* For updating the device tree at runtime */
379 #define OF_RECONFIG_ATTACH_NODE 0x0001
380 #define OF_RECONFIG_DETACH_NODE 0x0002
381 #define OF_RECONFIG_ADD_PROPERTY 0x0003
382 #define OF_RECONFIG_REMOVE_PROPERTY 0x0004
383 #define OF_RECONFIG_UPDATE_PROPERTY 0x0005
385 extern int of_attach_node(struct device_node *);
386 extern int of_detach_node(struct device_node *);
388 #define of_match_ptr(_ptr) (_ptr)
391 * struct property *prop;
395 * of_property_for_each_u32(np, "propname", prop, p, u)
396 * printk("U32 value: %x\n", u);
398 const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
401 * struct property *prop;
404 * of_property_for_each_string(np, "propname", prop, s)
405 * printk("String value: %s\n", s);
407 const char *of_prop_next_string(struct property *prop, const char *cur);
409 bool of_console_check(struct device_node *dn, char *name, int index);
411 #else /* CONFIG_OF */
413 static inline void of_core_init(void)
417 static inline bool is_of_node(struct fwnode_handle *fwnode)
422 static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
427 static inline const char* of_node_full_name(const struct device_node *np)
432 static inline struct device_node *of_find_node_by_name(struct device_node *from,
438 static inline struct device_node *of_find_node_by_type(struct device_node *from,
444 static inline struct device_node *of_find_matching_node_and_match(
445 struct device_node *from,
446 const struct of_device_id *matches,
447 const struct of_device_id **match)
452 static inline struct device_node *of_find_node_by_path(const char *path)
457 static inline struct device_node *of_find_node_opts_by_path(const char *path,
463 static inline struct device_node *of_find_node_by_phandle(phandle handle)
468 static inline struct device_node *of_get_parent(const struct device_node *node)
473 static inline struct device_node *of_get_next_child(
474 const struct device_node *node, struct device_node *prev)
479 static inline struct device_node *of_get_next_available_child(
480 const struct device_node *node, struct device_node *prev)
485 static inline struct device_node *of_find_node_with_property(
486 struct device_node *from, const char *prop_name)
491 static inline bool of_have_populated_dt(void)
496 static inline struct device_node *of_get_child_by_name(
497 const struct device_node *node,
503 static inline int of_device_is_compatible(const struct device_node *device,
509 static inline bool of_device_is_available(const struct device_node *device)
514 static inline bool of_device_is_big_endian(const struct device_node *device)
519 static inline struct property *of_find_property(const struct device_node *np,
526 static inline struct device_node *of_find_compatible_node(
527 struct device_node *from,
534 static inline int of_property_count_elems_of_size(const struct device_node *np,
535 const char *propname, int elem_size)
540 static inline int of_property_read_u32_index(const struct device_node *np,
541 const char *propname, u32 index, u32 *out_value)
546 static inline int of_property_read_u8_array(const struct device_node *np,
547 const char *propname, u8 *out_values, size_t sz)
552 static inline int of_property_read_u16_array(const struct device_node *np,
553 const char *propname, u16 *out_values, size_t sz)
558 static inline int of_property_read_u32_array(const struct device_node *np,
559 const char *propname,
560 u32 *out_values, size_t sz)
565 static inline int of_property_read_u64_array(const struct device_node *np,
566 const char *propname,
567 u64 *out_values, size_t sz)
572 static inline int of_property_read_string(const struct device_node *np,
573 const char *propname,
574 const char **out_string)
579 static inline int of_property_read_string_helper(const struct device_node *np,
580 const char *propname,
581 const char **out_strs, size_t sz, int index)
586 static inline const void *of_get_property(const struct device_node *node,
593 static inline struct device_node *of_get_cpu_node(int cpu,
594 unsigned int *thread)
599 static inline int of_property_read_u64(const struct device_node *np,
600 const char *propname, u64 *out_value)
605 static inline int of_property_match_string(const struct device_node *np,
606 const char *propname,
612 static inline struct device_node *of_parse_phandle(const struct device_node *np,
613 const char *phandle_name,
619 static inline int of_parse_phandle_with_args(const struct device_node *np,
620 const char *list_name,
621 const char *cells_name,
623 struct of_phandle_args *out_args)
628 static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
629 const char *list_name, int cells_count, int index,
630 struct of_phandle_args *out_args)
635 static inline int of_count_phandle_with_args(struct device_node *np,
636 const char *list_name,
637 const char *cells_name)
642 static inline int of_phandle_iterator_init(struct of_phandle_iterator *it,
643 const struct device_node *np,
644 const char *list_name,
645 const char *cells_name,
651 static inline int of_phandle_iterator_next(struct of_phandle_iterator *it)
656 static inline int of_phandle_iterator_args(struct of_phandle_iterator *it,
663 static inline int of_alias_get_id(struct device_node *np, const char *stem)
668 static inline int of_alias_get_highest_id(const char *stem)
673 static inline int of_machine_is_compatible(const char *compat)
678 static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
683 static inline const __be32 *of_prop_next_u32(struct property *prop,
684 const __be32 *cur, u32 *pu)
689 static inline const char *of_prop_next_string(struct property *prop,
695 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
700 static inline int of_node_test_and_set_flag(struct device_node *n,
706 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
710 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
714 static inline int of_property_check_flag(struct property *p, unsigned long flag)
719 static inline void of_property_set_flag(struct property *p, unsigned long flag)
723 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
727 #define of_match_ptr(_ptr) NULL
728 #define of_match_node(_matches, _node) NULL
729 #endif /* CONFIG_OF */
731 #if defined(CONFIG_OF) && defined(CONFIG_NUMA)
732 extern int of_node_to_nid(struct device_node *np);
734 static inline int of_node_to_nid(struct device_node *device)
740 #ifdef CONFIG_OF_NUMA
741 extern int of_numa_init(void);
743 static inline int of_numa_init(void)
749 static inline struct device_node *of_find_matching_node(
750 struct device_node *from,
751 const struct of_device_id *matches)
753 return of_find_matching_node_and_match(from, matches, NULL);
757 * of_property_count_u8_elems - Count the number of u8 elements in a property
759 * @np: device node from which the property value is to be read.
760 * @propname: name of the property to be searched.
762 * Search for a property in a device node and count the number of u8 elements
763 * in it. Returns number of elements on sucess, -EINVAL if the property does
764 * not exist or its length does not match a multiple of u8 and -ENODATA if the
765 * property does not have a value.
767 static inline int of_property_count_u8_elems(const struct device_node *np,
768 const char *propname)
770 return of_property_count_elems_of_size(np, propname, sizeof(u8));
774 * of_property_count_u16_elems - Count the number of u16 elements in a property
776 * @np: device node from which the property value is to be read.
777 * @propname: name of the property to be searched.
779 * Search for a property in a device node and count the number of u16 elements
780 * in it. Returns number of elements on sucess, -EINVAL if the property does
781 * not exist or its length does not match a multiple of u16 and -ENODATA if the
782 * property does not have a value.
784 static inline int of_property_count_u16_elems(const struct device_node *np,
785 const char *propname)
787 return of_property_count_elems_of_size(np, propname, sizeof(u16));
791 * of_property_count_u32_elems - Count the number of u32 elements in a property
793 * @np: device node from which the property value is to be read.
794 * @propname: name of the property to be searched.
796 * Search for a property in a device node and count the number of u32 elements
797 * in it. Returns number of elements on sucess, -EINVAL if the property does
798 * not exist or its length does not match a multiple of u32 and -ENODATA if the
799 * property does not have a value.
801 static inline int of_property_count_u32_elems(const struct device_node *np,
802 const char *propname)
804 return of_property_count_elems_of_size(np, propname, sizeof(u32));
808 * of_property_count_u64_elems - Count the number of u64 elements in a property
810 * @np: device node from which the property value is to be read.
811 * @propname: name of the property to be searched.
813 * Search for a property in a device node and count the number of u64 elements
814 * in it. Returns number of elements on sucess, -EINVAL if the property does
815 * not exist or its length does not match a multiple of u64 and -ENODATA if the
816 * property does not have a value.
818 static inline int of_property_count_u64_elems(const struct device_node *np,
819 const char *propname)
821 return of_property_count_elems_of_size(np, propname, sizeof(u64));
825 * of_property_read_string_array() - Read an array of strings from a multiple
827 * @np: device node from which the property value is to be read.
828 * @propname: name of the property to be searched.
829 * @out_strs: output array of string pointers.
830 * @sz: number of array elements to read.
832 * Search for a property in a device tree node and retrieve a list of
833 * terminated string values (pointer to data, not a copy) in that property.
835 * If @out_strs is NULL, the number of strings in the property is returned.
837 static inline int of_property_read_string_array(const struct device_node *np,
838 const char *propname, const char **out_strs,
841 return of_property_read_string_helper(np, propname, out_strs, sz, 0);
845 * of_property_count_strings() - Find and return the number of strings from a
846 * multiple strings property.
847 * @np: device node from which the property value is to be read.
848 * @propname: name of the property to be searched.
850 * Search for a property in a device tree node and retrieve the number of null
851 * terminated string contain in it. Returns the number of strings on
852 * success, -EINVAL if the property does not exist, -ENODATA if property
853 * does not have a value, and -EILSEQ if the string is not null-terminated
854 * within the length of the property data.
856 static inline int of_property_count_strings(const struct device_node *np,
857 const char *propname)
859 return of_property_read_string_helper(np, propname, NULL, 0, 0);
863 * of_property_read_string_index() - Find and read a string from a multiple
865 * @np: device node from which the property value is to be read.
866 * @propname: name of the property to be searched.
867 * @index: index of the string in the list of strings
868 * @out_string: pointer to null terminated return string, modified only if
871 * Search for a property in a device tree node and retrieve a null
872 * terminated string value (pointer to data, not a copy) in the list of strings
873 * contained in that property.
874 * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
875 * property does not have a value, and -EILSEQ if the string is not
876 * null-terminated within the length of the property data.
878 * The out_string pointer is modified only if a valid string can be decoded.
880 static inline int of_property_read_string_index(const struct device_node *np,
881 const char *propname,
882 int index, const char **output)
884 int rc = of_property_read_string_helper(np, propname, output, 1, index);
885 return rc < 0 ? rc : 0;
889 * of_property_read_bool - Findfrom a property
890 * @np: device node from which the property value is to be read.
891 * @propname: name of the property to be searched.
893 * Search for a property in a device node.
894 * Returns true if the property exists false otherwise.
896 static inline bool of_property_read_bool(const struct device_node *np,
897 const char *propname)
899 struct property *prop = of_find_property(np, propname, NULL);
901 return prop ? true : false;
904 static inline int of_property_read_u8(const struct device_node *np,
905 const char *propname,
908 return of_property_read_u8_array(np, propname, out_value, 1);
911 static inline int of_property_read_u16(const struct device_node *np,
912 const char *propname,
915 return of_property_read_u16_array(np, propname, out_value, 1);
918 static inline int of_property_read_u32(const struct device_node *np,
919 const char *propname,
922 return of_property_read_u32_array(np, propname, out_value, 1);
925 static inline int of_property_read_s32(const struct device_node *np,
926 const char *propname,
929 return of_property_read_u32(np, propname, (u32*) out_value);
932 #define of_for_each_phandle(it, err, np, ln, cn, cc) \
933 for (of_phandle_iterator_init((it), (np), (ln), (cn), (cc)), \
934 err = of_phandle_iterator_next(it); \
936 err = of_phandle_iterator_next(it))
938 #define of_property_for_each_u32(np, propname, prop, p, u) \
939 for (prop = of_find_property(np, propname, NULL), \
940 p = of_prop_next_u32(prop, NULL, &u); \
942 p = of_prop_next_u32(prop, p, &u))
944 #define of_property_for_each_string(np, propname, prop, s) \
945 for (prop = of_find_property(np, propname, NULL), \
946 s = of_prop_next_string(prop, NULL); \
948 s = of_prop_next_string(prop, s))
950 #define for_each_node_by_name(dn, name) \
951 for (dn = of_find_node_by_name(NULL, name); dn; \
952 dn = of_find_node_by_name(dn, name))
953 #define for_each_node_by_type(dn, type) \
954 for (dn = of_find_node_by_type(NULL, type); dn; \
955 dn = of_find_node_by_type(dn, type))
956 #define for_each_compatible_node(dn, type, compatible) \
957 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
958 dn = of_find_compatible_node(dn, type, compatible))
959 #define for_each_matching_node(dn, matches) \
960 for (dn = of_find_matching_node(NULL, matches); dn; \
961 dn = of_find_matching_node(dn, matches))
962 #define for_each_matching_node_and_match(dn, matches, match) \
963 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
964 dn; dn = of_find_matching_node_and_match(dn, matches, match))
966 #define for_each_child_of_node(parent, child) \
967 for (child = of_get_next_child(parent, NULL); child != NULL; \
968 child = of_get_next_child(parent, child))
969 #define for_each_available_child_of_node(parent, child) \
970 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
971 child = of_get_next_available_child(parent, child))
973 #define for_each_node_with_property(dn, prop_name) \
974 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
975 dn = of_find_node_with_property(dn, prop_name))
977 static inline int of_get_child_count(const struct device_node *np)
979 struct device_node *child;
982 for_each_child_of_node(np, child)
988 static inline int of_get_available_child_count(const struct device_node *np)
990 struct device_node *child;
993 for_each_available_child_of_node(np, child)
999 #if defined(CONFIG_OF) && !defined(MODULE)
1000 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
1001 static const struct of_device_id __of_table_##name \
1002 __used __section(__##table##_of_table) \
1003 = { .compatible = compat, \
1004 .data = (fn == (fn_type)NULL) ? fn : fn }
1006 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
1007 static const struct of_device_id __of_table_##name \
1008 __attribute__((unused)) \
1009 = { .compatible = compat, \
1010 .data = (fn == (fn_type)NULL) ? fn : fn }
1013 typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
1014 typedef int (*of_init_fn_1_ret)(struct device_node *);
1015 typedef void (*of_init_fn_1)(struct device_node *);
1017 #define OF_DECLARE_1(table, name, compat, fn) \
1018 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
1019 #define OF_DECLARE_1_RET(table, name, compat, fn) \
1020 _OF_DECLARE(table, name, compat, fn, of_init_fn_1_ret)
1021 #define OF_DECLARE_2(table, name, compat, fn) \
1022 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
1025 * struct of_changeset_entry - Holds a changeset entry
1027 * @node: list_head for the log list
1028 * @action: notifier action
1029 * @np: pointer to the device node affected
1030 * @prop: pointer to the property affected
1031 * @old_prop: hold a pointer to the original property
1033 * Every modification of the device tree during a changeset
1034 * is held in a list of of_changeset_entry structures.
1035 * That way we can recover from a partial application, or we can
1036 * revert the changeset
1038 struct of_changeset_entry {
1039 struct list_head node;
1040 unsigned long action;
1041 struct device_node *np;
1042 struct property *prop;
1043 struct property *old_prop;
1047 * struct of_changeset - changeset tracker structure
1049 * @entries: list_head for the changeset entries
1051 * changesets are a convenient way to apply bulk changes to the
1052 * live tree. In case of an error, changes are rolled-back.
1053 * changesets live on after initial application, and if not
1054 * destroyed after use, they can be reverted in one single call.
1056 struct of_changeset {
1057 struct list_head entries;
1060 enum of_reconfig_change {
1061 OF_RECONFIG_NO_CHANGE = 0,
1062 OF_RECONFIG_CHANGE_ADD,
1063 OF_RECONFIG_CHANGE_REMOVE,
1066 #ifdef CONFIG_OF_DYNAMIC
1067 extern int of_reconfig_notifier_register(struct notifier_block *);
1068 extern int of_reconfig_notifier_unregister(struct notifier_block *);
1069 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
1070 extern int of_reconfig_get_state_change(unsigned long action,
1071 struct of_reconfig_data *arg);
1073 extern void of_changeset_init(struct of_changeset *ocs);
1074 extern void of_changeset_destroy(struct of_changeset *ocs);
1075 extern int of_changeset_apply(struct of_changeset *ocs);
1076 extern int of_changeset_revert(struct of_changeset *ocs);
1077 extern int of_changeset_action(struct of_changeset *ocs,
1078 unsigned long action, struct device_node *np,
1079 struct property *prop);
1081 static inline int of_changeset_attach_node(struct of_changeset *ocs,
1082 struct device_node *np)
1084 return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
1087 static inline int of_changeset_detach_node(struct of_changeset *ocs,
1088 struct device_node *np)
1090 return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
1093 static inline int of_changeset_add_property(struct of_changeset *ocs,
1094 struct device_node *np, struct property *prop)
1096 return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
1099 static inline int of_changeset_remove_property(struct of_changeset *ocs,
1100 struct device_node *np, struct property *prop)
1102 return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
1105 static inline int of_changeset_update_property(struct of_changeset *ocs,
1106 struct device_node *np, struct property *prop)
1108 return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
1110 #else /* CONFIG_OF_DYNAMIC */
1111 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
1115 static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
1119 static inline int of_reconfig_notify(unsigned long action,
1120 struct of_reconfig_data *arg)
1124 static inline int of_reconfig_get_state_change(unsigned long action,
1125 struct of_reconfig_data *arg)
1129 #endif /* CONFIG_OF_DYNAMIC */
1131 /* CONFIG_OF_RESOLVE api */
1132 extern int of_resolve_phandles(struct device_node *tree);
1135 * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
1136 * @np: Pointer to the given device_node
1138 * return true if present false otherwise
1140 static inline bool of_device_is_system_power_controller(const struct device_node *np)
1142 return of_property_read_bool(np, "system-power-controller");
1149 #ifdef CONFIG_OF_OVERLAY
1151 /* ID based overlays; the API for external users */
1152 int of_overlay_create(struct device_node *tree);
1153 int of_overlay_destroy(int id);
1154 int of_overlay_destroy_all(void);
1158 static inline int of_overlay_create(struct device_node *tree)
1163 static inline int of_overlay_destroy(int id)
1168 static inline int of_overlay_destroy_all(void)
1175 #endif /* _LINUX_OF_H */