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_reconfig_data {
79 struct device_node *dn;
80 struct property *prop;
81 struct property *old_prop;
84 /* initialize a node */
85 extern struct kobj_type of_node_ktype;
86 static inline void of_node_init(struct device_node *node)
88 kobject_init(&node->kobj, &of_node_ktype);
89 node->fwnode.type = FWNODE_OF;
92 /* true when node is initialized */
93 static inline int of_node_is_initialized(struct device_node *node)
95 return node && node->kobj.state_initialized;
98 /* true when node is attached (i.e. present on sysfs) */
99 static inline int of_node_is_attached(struct device_node *node)
101 return node && node->kobj.state_in_sysfs;
104 #ifdef CONFIG_OF_DYNAMIC
105 extern struct device_node *of_node_get(struct device_node *node);
106 extern void of_node_put(struct device_node *node);
107 #else /* CONFIG_OF_DYNAMIC */
108 /* Dummy ref counting routines - to be implemented later */
109 static inline struct device_node *of_node_get(struct device_node *node)
113 static inline void of_node_put(struct device_node *node) { }
114 #endif /* !CONFIG_OF_DYNAMIC */
116 /* Pointer for first entry in chain of all nodes. */
117 extern struct device_node *of_root;
118 extern struct device_node *of_chosen;
119 extern struct device_node *of_aliases;
120 extern struct device_node *of_stdout;
121 extern raw_spinlock_t devtree_lock;
123 /* flag descriptions (need to be visible even when !CONFIG_OF) */
124 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
125 #define OF_DETACHED 2 /* node has been detached from the device tree */
126 #define OF_POPULATED 3 /* device already created for the node */
127 #define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */
130 static inline bool is_of_node(struct fwnode_handle *fwnode)
132 return fwnode && fwnode->type == FWNODE_OF;
135 static inline struct device_node *of_node(struct fwnode_handle *fwnode)
137 return fwnode ? container_of(fwnode, struct device_node, fwnode) : NULL;
140 static inline bool of_have_populated_dt(void)
142 return of_root != NULL;
145 static inline bool of_node_is_root(const struct device_node *node)
147 return node && (node->parent == NULL);
150 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
152 return test_bit(flag, &n->_flags);
155 static inline int of_node_test_and_set_flag(struct device_node *n,
158 return test_and_set_bit(flag, &n->_flags);
161 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
163 set_bit(flag, &n->_flags);
166 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
168 clear_bit(flag, &n->_flags);
171 static inline int of_property_check_flag(struct property *p, unsigned long flag)
173 return test_bit(flag, &p->_flags);
176 static inline void of_property_set_flag(struct property *p, unsigned long flag)
178 set_bit(flag, &p->_flags);
181 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
183 clear_bit(flag, &p->_flags);
186 extern struct device_node *__of_find_all_nodes(struct device_node *prev);
187 extern struct device_node *of_find_all_nodes(struct device_node *prev);
190 * OF address retrieval & translation
193 /* Helper to read a big number; size is in cells (not bytes) */
194 static inline u64 of_read_number(const __be32 *cell, int size)
198 r = (r << 32) | be32_to_cpu(*(cell++));
202 /* Like of_read_number, but we want an unsigned long result */
203 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
205 /* toss away upper bits if unsigned long is smaller than u64 */
206 return of_read_number(cell, size);
209 #if defined(CONFIG_SPARC)
210 #include <asm/prom.h>
213 /* Default #address and #size cells. Allow arch asm/prom.h to override */
214 #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
215 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
216 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
219 /* Default string compare functions, Allow arch asm/prom.h to override */
220 #if !defined(of_compat_cmp)
221 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
222 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
223 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
226 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
227 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
229 #define OF_BAD_ADDR ((u64)-1)
231 static inline const char *of_node_full_name(const struct device_node *np)
233 return np ? np->full_name : "<no-node>";
236 #define for_each_of_allnodes_from(from, dn) \
237 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
238 #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
239 extern struct device_node *of_find_node_by_name(struct device_node *from,
241 extern struct device_node *of_find_node_by_type(struct device_node *from,
243 extern struct device_node *of_find_compatible_node(struct device_node *from,
244 const char *type, const char *compat);
245 extern struct device_node *of_find_matching_node_and_match(
246 struct device_node *from,
247 const struct of_device_id *matches,
248 const struct of_device_id **match);
250 extern struct device_node *of_find_node_opts_by_path(const char *path,
252 static inline struct device_node *of_find_node_by_path(const char *path)
254 return of_find_node_opts_by_path(path, NULL);
257 extern struct device_node *of_find_node_by_phandle(phandle handle);
258 extern struct device_node *of_get_parent(const struct device_node *node);
259 extern struct device_node *of_get_next_parent(struct device_node *node);
260 extern struct device_node *of_get_next_child(const struct device_node *node,
261 struct device_node *prev);
262 extern struct device_node *of_get_next_available_child(
263 const struct device_node *node, struct device_node *prev);
265 extern struct device_node *of_get_child_by_name(const struct device_node *node,
269 extern struct device_node *of_find_next_cache_node(const struct device_node *);
270 extern struct device_node *of_find_node_with_property(
271 struct device_node *from, const char *prop_name);
273 extern struct property *of_find_property(const struct device_node *np,
276 extern int of_property_count_elems_of_size(const struct device_node *np,
277 const char *propname, int elem_size);
278 extern int of_property_read_u32_index(const struct device_node *np,
279 const char *propname,
280 u32 index, u32 *out_value);
281 extern int of_property_read_u8_array(const struct device_node *np,
282 const char *propname, u8 *out_values, size_t sz);
283 extern int of_property_read_u16_array(const struct device_node *np,
284 const char *propname, u16 *out_values, size_t sz);
285 extern int of_property_read_u32_array(const struct device_node *np,
286 const char *propname,
289 extern int of_property_read_u64(const struct device_node *np,
290 const char *propname, u64 *out_value);
291 extern int of_property_read_u64_array(const struct device_node *np,
292 const char *propname,
296 extern int of_property_read_string(struct device_node *np,
297 const char *propname,
298 const char **out_string);
299 extern int of_property_match_string(struct device_node *np,
300 const char *propname,
302 extern int of_property_read_string_helper(struct device_node *np,
303 const char *propname,
304 const char **out_strs, size_t sz, int index);
305 extern int of_device_is_compatible(const struct device_node *device,
307 extern bool of_device_is_available(const struct device_node *device);
308 extern bool of_device_is_big_endian(const struct device_node *device);
309 extern const void *of_get_property(const struct device_node *node,
312 extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
313 #define for_each_property_of_node(dn, pp) \
314 for (pp = dn->properties; pp != NULL; pp = pp->next)
316 extern int of_n_addr_cells(struct device_node *np);
317 extern int of_n_size_cells(struct device_node *np);
318 extern const struct of_device_id *of_match_node(
319 const struct of_device_id *matches, const struct device_node *node);
320 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
321 extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
322 extern struct device_node *of_parse_phandle(const struct device_node *np,
323 const char *phandle_name,
325 extern int of_parse_phandle_with_args(const struct device_node *np,
326 const char *list_name, const char *cells_name, int index,
327 struct of_phandle_args *out_args);
328 extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
329 const char *list_name, int cells_count, int index,
330 struct of_phandle_args *out_args);
331 extern int of_count_phandle_with_args(const struct device_node *np,
332 const char *list_name, const char *cells_name);
334 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
335 extern int of_alias_get_id(struct device_node *np, const char *stem);
336 extern int of_alias_get_highest_id(const char *stem);
338 extern int of_machine_is_compatible(const char *compat);
340 extern int of_add_property(struct device_node *np, struct property *prop);
341 extern int of_remove_property(struct device_node *np, struct property *prop);
342 extern int of_update_property(struct device_node *np, struct property *newprop);
344 /* For updating the device tree at runtime */
345 #define OF_RECONFIG_ATTACH_NODE 0x0001
346 #define OF_RECONFIG_DETACH_NODE 0x0002
347 #define OF_RECONFIG_ADD_PROPERTY 0x0003
348 #define OF_RECONFIG_REMOVE_PROPERTY 0x0004
349 #define OF_RECONFIG_UPDATE_PROPERTY 0x0005
351 extern int of_attach_node(struct device_node *);
352 extern int of_detach_node(struct device_node *);
354 #define of_match_ptr(_ptr) (_ptr)
357 * struct property *prop;
361 * of_property_for_each_u32(np, "propname", prop, p, u)
362 * printk("U32 value: %x\n", u);
364 const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
367 * struct property *prop;
370 * of_property_for_each_string(np, "propname", prop, s)
371 * printk("String value: %s\n", s);
373 const char *of_prop_next_string(struct property *prop, const char *cur);
375 bool of_console_check(struct device_node *dn, char *name, int index);
377 #else /* CONFIG_OF */
379 static inline bool is_of_node(struct fwnode_handle *fwnode)
384 static inline struct device_node *of_node(struct fwnode_handle *fwnode)
389 static inline const char* of_node_full_name(const struct device_node *np)
394 static inline struct device_node *of_find_node_by_name(struct device_node *from,
400 static inline struct device_node *of_find_node_by_type(struct device_node *from,
406 static inline struct device_node *of_find_matching_node_and_match(
407 struct device_node *from,
408 const struct of_device_id *matches,
409 const struct of_device_id **match)
414 static inline struct device_node *of_find_node_by_path(const char *path)
419 static inline struct device_node *of_find_node_opts_by_path(const char *path,
425 static inline struct device_node *of_find_node_by_phandle(phandle handle)
430 static inline struct device_node *of_get_parent(const struct device_node *node)
435 static inline struct device_node *of_get_next_child(
436 const struct device_node *node, struct device_node *prev)
441 static inline struct device_node *of_get_next_available_child(
442 const struct device_node *node, struct device_node *prev)
447 static inline struct device_node *of_find_node_with_property(
448 struct device_node *from, const char *prop_name)
453 static inline bool of_have_populated_dt(void)
458 static inline struct device_node *of_get_child_by_name(
459 const struct device_node *node,
465 static inline int of_device_is_compatible(const struct device_node *device,
471 static inline bool of_device_is_available(const struct device_node *device)
476 static inline bool of_device_is_big_endian(const struct device_node *device)
481 static inline struct property *of_find_property(const struct device_node *np,
488 static inline struct device_node *of_find_compatible_node(
489 struct device_node *from,
496 static inline int of_property_count_elems_of_size(const struct device_node *np,
497 const char *propname, int elem_size)
502 static inline int of_property_read_u32_index(const struct device_node *np,
503 const char *propname, u32 index, u32 *out_value)
508 static inline int of_property_read_u8_array(const struct device_node *np,
509 const char *propname, u8 *out_values, size_t sz)
514 static inline int of_property_read_u16_array(const struct device_node *np,
515 const char *propname, u16 *out_values, size_t sz)
520 static inline int of_property_read_u32_array(const struct device_node *np,
521 const char *propname,
522 u32 *out_values, size_t sz)
527 static inline int of_property_read_u64_array(const struct device_node *np,
528 const char *propname,
529 u64 *out_values, size_t sz)
534 static inline int of_property_read_string(struct device_node *np,
535 const char *propname,
536 const char **out_string)
541 static inline int of_property_read_string_helper(struct device_node *np,
542 const char *propname,
543 const char **out_strs, size_t sz, int index)
548 static inline const void *of_get_property(const struct device_node *node,
555 static inline struct device_node *of_get_cpu_node(int cpu,
556 unsigned int *thread)
561 static inline int of_property_read_u64(const struct device_node *np,
562 const char *propname, u64 *out_value)
567 static inline int of_property_match_string(struct device_node *np,
568 const char *propname,
574 static inline struct device_node *of_parse_phandle(const struct device_node *np,
575 const char *phandle_name,
581 static inline int of_parse_phandle_with_args(struct device_node *np,
582 const char *list_name,
583 const char *cells_name,
585 struct of_phandle_args *out_args)
590 static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
591 const char *list_name, int cells_count, int index,
592 struct of_phandle_args *out_args)
597 static inline int of_count_phandle_with_args(struct device_node *np,
598 const char *list_name,
599 const char *cells_name)
604 static inline int of_alias_get_id(struct device_node *np, const char *stem)
609 static inline int of_alias_get_highest_id(const char *stem)
614 static inline int of_machine_is_compatible(const char *compat)
619 static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
624 static inline const __be32 *of_prop_next_u32(struct property *prop,
625 const __be32 *cur, u32 *pu)
630 static inline const char *of_prop_next_string(struct property *prop,
636 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
641 static inline int of_node_test_and_set_flag(struct device_node *n,
647 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
651 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
655 static inline int of_property_check_flag(struct property *p, unsigned long flag)
660 static inline void of_property_set_flag(struct property *p, unsigned long flag)
664 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
668 #define of_match_ptr(_ptr) NULL
669 #define of_match_node(_matches, _node) NULL
670 #endif /* CONFIG_OF */
672 #if defined(CONFIG_OF) && defined(CONFIG_NUMA)
673 extern int of_node_to_nid(struct device_node *np);
675 static inline int of_node_to_nid(struct device_node *device)
681 static inline struct device_node *of_find_matching_node(
682 struct device_node *from,
683 const struct of_device_id *matches)
685 return of_find_matching_node_and_match(from, matches, NULL);
689 * of_property_count_u8_elems - Count the number of u8 elements in a property
691 * @np: device node from which the property value is to be read.
692 * @propname: name of the property to be searched.
694 * Search for a property in a device node and count the number of u8 elements
695 * in it. Returns number of elements on sucess, -EINVAL if the property does
696 * not exist or its length does not match a multiple of u8 and -ENODATA if the
697 * property does not have a value.
699 static inline int of_property_count_u8_elems(const struct device_node *np,
700 const char *propname)
702 return of_property_count_elems_of_size(np, propname, sizeof(u8));
706 * of_property_count_u16_elems - Count the number of u16 elements in a property
708 * @np: device node from which the property value is to be read.
709 * @propname: name of the property to be searched.
711 * Search for a property in a device node and count the number of u16 elements
712 * in it. Returns number of elements on sucess, -EINVAL if the property does
713 * not exist or its length does not match a multiple of u16 and -ENODATA if the
714 * property does not have a value.
716 static inline int of_property_count_u16_elems(const struct device_node *np,
717 const char *propname)
719 return of_property_count_elems_of_size(np, propname, sizeof(u16));
723 * of_property_count_u32_elems - Count the number of u32 elements in a property
725 * @np: device node from which the property value is to be read.
726 * @propname: name of the property to be searched.
728 * Search for a property in a device node and count the number of u32 elements
729 * in it. Returns number of elements on sucess, -EINVAL if the property does
730 * not exist or its length does not match a multiple of u32 and -ENODATA if the
731 * property does not have a value.
733 static inline int of_property_count_u32_elems(const struct device_node *np,
734 const char *propname)
736 return of_property_count_elems_of_size(np, propname, sizeof(u32));
740 * of_property_count_u64_elems - Count the number of u64 elements in a property
742 * @np: device node from which the property value is to be read.
743 * @propname: name of the property to be searched.
745 * Search for a property in a device node and count the number of u64 elements
746 * in it. Returns number of elements on sucess, -EINVAL if the property does
747 * not exist or its length does not match a multiple of u64 and -ENODATA if the
748 * property does not have a value.
750 static inline int of_property_count_u64_elems(const struct device_node *np,
751 const char *propname)
753 return of_property_count_elems_of_size(np, propname, sizeof(u64));
757 * of_property_read_string_array() - Read an array of strings from a multiple
759 * @np: device node from which the property value is to be read.
760 * @propname: name of the property to be searched.
761 * @out_strs: output array of string pointers.
762 * @sz: number of array elements to read.
764 * Search for a property in a device tree node and retrieve a list of
765 * terminated string values (pointer to data, not a copy) in that property.
767 * If @out_strs is NULL, the number of strings in the property is returned.
769 static inline int of_property_read_string_array(struct device_node *np,
770 const char *propname, const char **out_strs,
773 return of_property_read_string_helper(np, propname, out_strs, sz, 0);
777 * of_property_count_strings() - Find and return the number of strings from a
778 * multiple strings property.
779 * @np: device node from which the property value is to be read.
780 * @propname: name of the property to be searched.
782 * Search for a property in a device tree node and retrieve the number of null
783 * terminated string contain in it. Returns the number of strings on
784 * success, -EINVAL if the property does not exist, -ENODATA if property
785 * does not have a value, and -EILSEQ if the string is not null-terminated
786 * within the length of the property data.
788 static inline int of_property_count_strings(struct device_node *np,
789 const char *propname)
791 return of_property_read_string_helper(np, propname, NULL, 0, 0);
795 * of_property_read_string_index() - Find and read a string from a multiple
797 * @np: device node from which the property value is to be read.
798 * @propname: name of the property to be searched.
799 * @index: index of the string in the list of strings
800 * @out_string: pointer to null terminated return string, modified only if
803 * Search for a property in a device tree node and retrieve a null
804 * terminated string value (pointer to data, not a copy) in the list of strings
805 * contained in that property.
806 * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
807 * property does not have a value, and -EILSEQ if the string is not
808 * null-terminated within the length of the property data.
810 * The out_string pointer is modified only if a valid string can be decoded.
812 static inline int of_property_read_string_index(struct device_node *np,
813 const char *propname,
814 int index, const char **output)
816 int rc = of_property_read_string_helper(np, propname, output, 1, index);
817 return rc < 0 ? rc : 0;
821 * of_property_read_bool - Findfrom a property
822 * @np: device node from which the property value is to be read.
823 * @propname: name of the property to be searched.
825 * Search for a property in a device node.
826 * Returns true if the property exists false otherwise.
828 static inline bool of_property_read_bool(const struct device_node *np,
829 const char *propname)
831 struct property *prop = of_find_property(np, propname, NULL);
833 return prop ? true : false;
836 static inline int of_property_read_u8(const struct device_node *np,
837 const char *propname,
840 return of_property_read_u8_array(np, propname, out_value, 1);
843 static inline int of_property_read_u16(const struct device_node *np,
844 const char *propname,
847 return of_property_read_u16_array(np, propname, out_value, 1);
850 static inline int of_property_read_u32(const struct device_node *np,
851 const char *propname,
854 return of_property_read_u32_array(np, propname, out_value, 1);
857 static inline int of_property_read_s32(const struct device_node *np,
858 const char *propname,
861 return of_property_read_u32(np, propname, (u32*) out_value);
864 #define of_property_for_each_u32(np, propname, prop, p, u) \
865 for (prop = of_find_property(np, propname, NULL), \
866 p = of_prop_next_u32(prop, NULL, &u); \
868 p = of_prop_next_u32(prop, p, &u))
870 #define of_property_for_each_string(np, propname, prop, s) \
871 for (prop = of_find_property(np, propname, NULL), \
872 s = of_prop_next_string(prop, NULL); \
874 s = of_prop_next_string(prop, s))
876 #define for_each_node_by_name(dn, name) \
877 for (dn = of_find_node_by_name(NULL, name); dn; \
878 dn = of_find_node_by_name(dn, name))
879 #define for_each_node_by_type(dn, type) \
880 for (dn = of_find_node_by_type(NULL, type); dn; \
881 dn = of_find_node_by_type(dn, type))
882 #define for_each_compatible_node(dn, type, compatible) \
883 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
884 dn = of_find_compatible_node(dn, type, compatible))
885 #define for_each_matching_node(dn, matches) \
886 for (dn = of_find_matching_node(NULL, matches); dn; \
887 dn = of_find_matching_node(dn, matches))
888 #define for_each_matching_node_and_match(dn, matches, match) \
889 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
890 dn; dn = of_find_matching_node_and_match(dn, matches, match))
892 #define for_each_child_of_node(parent, child) \
893 for (child = of_get_next_child(parent, NULL); child != NULL; \
894 child = of_get_next_child(parent, child))
895 #define for_each_available_child_of_node(parent, child) \
896 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
897 child = of_get_next_available_child(parent, child))
899 #define for_each_node_with_property(dn, prop_name) \
900 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
901 dn = of_find_node_with_property(dn, prop_name))
903 static inline int of_get_child_count(const struct device_node *np)
905 struct device_node *child;
908 for_each_child_of_node(np, child)
914 static inline int of_get_available_child_count(const struct device_node *np)
916 struct device_node *child;
919 for_each_available_child_of_node(np, child)
926 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
927 static const struct of_device_id __of_table_##name \
928 __used __section(__##table##_of_table) \
929 = { .compatible = compat, \
930 .data = (fn == (fn_type)NULL) ? fn : fn }
932 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
933 static const struct of_device_id __of_table_##name \
934 __attribute__((unused)) \
935 = { .compatible = compat, \
936 .data = (fn == (fn_type)NULL) ? fn : fn }
939 typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
940 typedef void (*of_init_fn_1)(struct device_node *);
942 #define OF_DECLARE_1(table, name, compat, fn) \
943 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
944 #define OF_DECLARE_2(table, name, compat, fn) \
945 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
948 * struct of_changeset_entry - Holds a changeset entry
950 * @node: list_head for the log list
951 * @action: notifier action
952 * @np: pointer to the device node affected
953 * @prop: pointer to the property affected
954 * @old_prop: hold a pointer to the original property
956 * Every modification of the device tree during a changeset
957 * is held in a list of of_changeset_entry structures.
958 * That way we can recover from a partial application, or we can
959 * revert the changeset
961 struct of_changeset_entry {
962 struct list_head node;
963 unsigned long action;
964 struct device_node *np;
965 struct property *prop;
966 struct property *old_prop;
970 * struct of_changeset - changeset tracker structure
972 * @entries: list_head for the changeset entries
974 * changesets are a convenient way to apply bulk changes to the
975 * live tree. In case of an error, changes are rolled-back.
976 * changesets live on after initial application, and if not
977 * destroyed after use, they can be reverted in one single call.
979 struct of_changeset {
980 struct list_head entries;
983 enum of_reconfig_change {
984 OF_RECONFIG_NO_CHANGE = 0,
985 OF_RECONFIG_CHANGE_ADD,
986 OF_RECONFIG_CHANGE_REMOVE,
989 #ifdef CONFIG_OF_DYNAMIC
990 extern int of_reconfig_notifier_register(struct notifier_block *);
991 extern int of_reconfig_notifier_unregister(struct notifier_block *);
992 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
993 extern int of_reconfig_get_state_change(unsigned long action,
994 struct of_reconfig_data *arg);
996 extern void of_changeset_init(struct of_changeset *ocs);
997 extern void of_changeset_destroy(struct of_changeset *ocs);
998 extern int of_changeset_apply(struct of_changeset *ocs);
999 extern int of_changeset_revert(struct of_changeset *ocs);
1000 extern int of_changeset_action(struct of_changeset *ocs,
1001 unsigned long action, struct device_node *np,
1002 struct property *prop);
1004 static inline int of_changeset_attach_node(struct of_changeset *ocs,
1005 struct device_node *np)
1007 return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
1010 static inline int of_changeset_detach_node(struct of_changeset *ocs,
1011 struct device_node *np)
1013 return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
1016 static inline int of_changeset_add_property(struct of_changeset *ocs,
1017 struct device_node *np, struct property *prop)
1019 return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
1022 static inline int of_changeset_remove_property(struct of_changeset *ocs,
1023 struct device_node *np, struct property *prop)
1025 return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
1028 static inline int of_changeset_update_property(struct of_changeset *ocs,
1029 struct device_node *np, struct property *prop)
1031 return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
1033 #else /* CONFIG_OF_DYNAMIC */
1034 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
1038 static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
1042 static inline int of_reconfig_notify(unsigned long action,
1043 struct of_reconfig_data *arg)
1047 static inline int of_reconfig_get_state_change(unsigned long action,
1048 struct of_reconfig_data *arg)
1052 #endif /* CONFIG_OF_DYNAMIC */
1054 /* CONFIG_OF_RESOLVE api */
1055 extern int of_resolve_phandles(struct device_node *tree);
1058 * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
1059 * @np: Pointer to the given device_node
1061 * return true if present false otherwise
1063 static inline bool of_device_is_system_power_controller(const struct device_node *np)
1065 return of_property_read_bool(np, "system-power-controller");
1072 #ifdef CONFIG_OF_OVERLAY
1074 /* ID based overlays; the API for external users */
1075 int of_overlay_create(struct device_node *tree);
1076 int of_overlay_destroy(int id);
1077 int of_overlay_destroy_all(void);
1081 static inline int of_overlay_create(struct device_node *tree)
1086 static inline int of_overlay_destroy(int id)
1091 static inline int of_overlay_destroy_all(void)
1098 #endif /* _LINUX_OF_H */