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/list.h>
28 #include <asm/byteorder.h>
29 #include <asm/errno.h>
38 struct property
*next
;
40 unsigned int unique_id
;
41 struct bin_attribute attr
;
44 #if defined(CONFIG_SPARC)
45 struct of_irq_controller
;
52 const char *full_name
;
54 struct property
*properties
;
55 struct property
*deadprops
; /* removed properties */
56 struct device_node
*parent
;
57 struct device_node
*child
;
58 struct device_node
*sibling
;
59 struct device_node
*next
; /* next device of same type */
63 #if defined(CONFIG_SPARC)
64 const char *path_component_name
;
65 unsigned int unique_id
;
66 struct of_irq_controller
*irq_trans
;
70 #define MAX_PHANDLE_ARGS 16
71 struct of_phandle_args
{
72 struct device_node
*np
;
74 uint32_t args
[MAX_PHANDLE_ARGS
];
77 struct of_reconfig_data
{
78 struct device_node
*dn
;
79 struct property
*prop
;
80 struct property
*old_prop
;
83 /* initialize a node */
84 extern struct kobj_type of_node_ktype
;
85 static inline void of_node_init(struct device_node
*node
)
87 kobject_init(&node
->kobj
, &of_node_ktype
);
90 /* true when node is initialized */
91 static inline int of_node_is_initialized(struct device_node
*node
)
93 return node
&& node
->kobj
.state_initialized
;
96 /* true when node is attached (i.e. present on sysfs) */
97 static inline int of_node_is_attached(struct device_node
*node
)
99 return node
&& node
->kobj
.state_in_sysfs
;
102 #ifdef CONFIG_OF_DYNAMIC
103 extern struct device_node
*of_node_get(struct device_node
*node
);
104 extern void of_node_put(struct device_node
*node
);
105 #else /* CONFIG_OF_DYNAMIC */
106 /* Dummy ref counting routines - to be implemented later */
107 static inline struct device_node
*of_node_get(struct device_node
*node
)
111 static inline void of_node_put(struct device_node
*node
) { }
112 #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 static inline bool of_have_populated_dt(void)
125 return of_root
!= NULL
;
128 static inline bool of_node_is_root(const struct device_node
*node
)
130 return node
&& (node
->parent
== NULL
);
133 static inline int of_node_check_flag(struct device_node
*n
, unsigned long flag
)
135 return test_bit(flag
, &n
->_flags
);
138 static inline int of_node_test_and_set_flag(struct device_node
*n
,
141 return test_and_set_bit(flag
, &n
->_flags
);
144 static inline void of_node_set_flag(struct device_node
*n
, unsigned long flag
)
146 set_bit(flag
, &n
->_flags
);
149 static inline void of_node_clear_flag(struct device_node
*n
, unsigned long flag
)
151 clear_bit(flag
, &n
->_flags
);
154 static inline int of_property_check_flag(struct property
*p
, unsigned long flag
)
156 return test_bit(flag
, &p
->_flags
);
159 static inline void of_property_set_flag(struct property
*p
, unsigned long flag
)
161 set_bit(flag
, &p
->_flags
);
164 static inline void of_property_clear_flag(struct property
*p
, unsigned long flag
)
166 clear_bit(flag
, &p
->_flags
);
169 extern struct device_node
*__of_find_all_nodes(struct device_node
*prev
);
170 extern struct device_node
*of_find_all_nodes(struct device_node
*prev
);
173 * OF address retrieval & translation
176 /* Helper to read a big number; size is in cells (not bytes) */
177 static inline u64
of_read_number(const __be32
*cell
, int size
)
181 r
= (r
<< 32) | be32_to_cpu(*(cell
++));
185 /* Like of_read_number, but we want an unsigned long result */
186 static inline unsigned long of_read_ulong(const __be32
*cell
, int size
)
188 /* toss away upper bits if unsigned long is smaller than u64 */
189 return of_read_number(cell
, size
);
192 #if defined(CONFIG_SPARC)
193 #include <asm/prom.h>
196 /* Default #address and #size cells. Allow arch asm/prom.h to override */
197 #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
198 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
199 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
202 /* Default string compare functions, Allow arch asm/prom.h to override */
203 #if !defined(of_compat_cmp)
204 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
205 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
206 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
209 /* flag descriptions */
210 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
211 #define OF_DETACHED 2 /* node has been detached from the device tree */
212 #define OF_POPULATED 3 /* device already created for the node */
213 #define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */
215 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
216 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
218 #define OF_BAD_ADDR ((u64)-1)
220 static inline const char *of_node_full_name(const struct device_node
*np
)
222 return np
? np
->full_name
: "<no-node>";
225 #define for_each_of_allnodes_from(from, dn) \
226 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
227 #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
228 extern struct device_node
*of_find_node_by_name(struct device_node
*from
,
230 extern struct device_node
*of_find_node_by_type(struct device_node
*from
,
232 extern struct device_node
*of_find_compatible_node(struct device_node
*from
,
233 const char *type
, const char *compat
);
234 extern struct device_node
*of_find_matching_node_and_match(
235 struct device_node
*from
,
236 const struct of_device_id
*matches
,
237 const struct of_device_id
**match
);
239 extern struct device_node
*of_find_node_by_path(const char *path
);
240 extern struct device_node
*of_find_node_by_phandle(phandle handle
);
241 extern struct device_node
*of_get_parent(const struct device_node
*node
);
242 extern struct device_node
*of_get_next_parent(struct device_node
*node
);
243 extern struct device_node
*of_get_next_child(const struct device_node
*node
,
244 struct device_node
*prev
);
245 extern struct device_node
*of_get_next_available_child(
246 const struct device_node
*node
, struct device_node
*prev
);
248 extern struct device_node
*of_get_child_by_name(const struct device_node
*node
,
252 extern struct device_node
*of_find_next_cache_node(const struct device_node
*);
253 extern struct device_node
*of_find_node_with_property(
254 struct device_node
*from
, const char *prop_name
);
256 extern struct property
*of_find_property(const struct device_node
*np
,
259 extern int of_property_count_elems_of_size(const struct device_node
*np
,
260 const char *propname
, int elem_size
);
261 extern int of_property_read_u32_index(const struct device_node
*np
,
262 const char *propname
,
263 u32 index
, u32
*out_value
);
264 extern int of_property_read_u8_array(const struct device_node
*np
,
265 const char *propname
, u8
*out_values
, size_t sz
);
266 extern int of_property_read_u16_array(const struct device_node
*np
,
267 const char *propname
, u16
*out_values
, size_t sz
);
268 extern int of_property_read_u32_array(const struct device_node
*np
,
269 const char *propname
,
272 extern int of_property_read_u64(const struct device_node
*np
,
273 const char *propname
, u64
*out_value
);
275 extern int of_property_read_string(struct device_node
*np
,
276 const char *propname
,
277 const char **out_string
);
278 extern int of_property_match_string(struct device_node
*np
,
279 const char *propname
,
281 extern int of_property_read_string_helper(struct device_node
*np
,
282 const char *propname
,
283 const char **out_strs
, size_t sz
, int index
);
284 extern int of_device_is_compatible(const struct device_node
*device
,
286 extern bool of_device_is_available(const struct device_node
*device
);
287 extern const void *of_get_property(const struct device_node
*node
,
290 extern struct device_node
*of_get_cpu_node(int cpu
, unsigned int *thread
);
291 #define for_each_property_of_node(dn, pp) \
292 for (pp = dn->properties; pp != NULL; pp = pp->next)
294 extern int of_n_addr_cells(struct device_node
*np
);
295 extern int of_n_size_cells(struct device_node
*np
);
296 extern const struct of_device_id
*of_match_node(
297 const struct of_device_id
*matches
, const struct device_node
*node
);
298 extern int of_modalias_node(struct device_node
*node
, char *modalias
, int len
);
299 extern void of_print_phandle_args(const char *msg
, const struct of_phandle_args
*args
);
300 extern struct device_node
*of_parse_phandle(const struct device_node
*np
,
301 const char *phandle_name
,
303 extern int of_parse_phandle_with_args(const struct device_node
*np
,
304 const char *list_name
, const char *cells_name
, int index
,
305 struct of_phandle_args
*out_args
);
306 extern int of_parse_phandle_with_fixed_args(const struct device_node
*np
,
307 const char *list_name
, int cells_count
, int index
,
308 struct of_phandle_args
*out_args
);
309 extern int of_count_phandle_with_args(const struct device_node
*np
,
310 const char *list_name
, const char *cells_name
);
312 extern void of_alias_scan(void * (*dt_alloc
)(u64 size
, u64 align
));
313 extern int of_alias_get_id(struct device_node
*np
, const char *stem
);
315 extern int of_machine_is_compatible(const char *compat
);
317 extern int of_add_property(struct device_node
*np
, struct property
*prop
);
318 extern int of_remove_property(struct device_node
*np
, struct property
*prop
);
319 extern int of_update_property(struct device_node
*np
, struct property
*newprop
);
321 /* For updating the device tree at runtime */
322 #define OF_RECONFIG_ATTACH_NODE 0x0001
323 #define OF_RECONFIG_DETACH_NODE 0x0002
324 #define OF_RECONFIG_ADD_PROPERTY 0x0003
325 #define OF_RECONFIG_REMOVE_PROPERTY 0x0004
326 #define OF_RECONFIG_UPDATE_PROPERTY 0x0005
328 extern int of_attach_node(struct device_node
*);
329 extern int of_detach_node(struct device_node
*);
331 #define of_match_ptr(_ptr) (_ptr)
334 * struct property *prop;
338 * of_property_for_each_u32(np, "propname", prop, p, u)
339 * printk("U32 value: %x\n", u);
341 const __be32
*of_prop_next_u32(struct property
*prop
, const __be32
*cur
,
344 * struct property *prop;
347 * of_property_for_each_string(np, "propname", prop, s)
348 * printk("String value: %s\n", s);
350 const char *of_prop_next_string(struct property
*prop
, const char *cur
);
352 bool of_console_check(struct device_node
*dn
, char *name
, int index
);
354 #else /* CONFIG_OF */
356 static inline const char* of_node_full_name(const struct device_node
*np
)
361 static inline struct device_node
*of_find_node_by_name(struct device_node
*from
,
367 static inline struct device_node
*of_find_node_by_type(struct device_node
*from
,
373 static inline struct device_node
*of_find_matching_node_and_match(
374 struct device_node
*from
,
375 const struct of_device_id
*matches
,
376 const struct of_device_id
**match
)
381 static inline struct device_node
*of_find_node_by_path(const char *path
)
386 static inline struct device_node
*of_get_parent(const struct device_node
*node
)
391 static inline struct device_node
*of_get_next_child(
392 const struct device_node
*node
, struct device_node
*prev
)
397 static inline struct device_node
*of_get_next_available_child(
398 const struct device_node
*node
, struct device_node
*prev
)
403 static inline struct device_node
*of_find_node_with_property(
404 struct device_node
*from
, const char *prop_name
)
409 static inline bool of_have_populated_dt(void)
414 static inline struct device_node
*of_get_child_by_name(
415 const struct device_node
*node
,
421 static inline int of_device_is_compatible(const struct device_node
*device
,
427 static inline bool of_device_is_available(const struct device_node
*device
)
432 static inline struct property
*of_find_property(const struct device_node
*np
,
439 static inline struct device_node
*of_find_compatible_node(
440 struct device_node
*from
,
447 static inline int of_property_count_elems_of_size(const struct device_node
*np
,
448 const char *propname
, int elem_size
)
453 static inline int of_property_read_u32_index(const struct device_node
*np
,
454 const char *propname
, u32 index
, u32
*out_value
)
459 static inline int of_property_read_u8_array(const struct device_node
*np
,
460 const char *propname
, u8
*out_values
, size_t sz
)
465 static inline int of_property_read_u16_array(const struct device_node
*np
,
466 const char *propname
, u16
*out_values
, size_t sz
)
471 static inline int of_property_read_u32_array(const struct device_node
*np
,
472 const char *propname
,
473 u32
*out_values
, size_t sz
)
478 static inline int of_property_read_string(struct device_node
*np
,
479 const char *propname
,
480 const char **out_string
)
485 static inline int of_property_read_string_helper(struct device_node
*np
,
486 const char *propname
,
487 const char **out_strs
, size_t sz
, int index
)
492 static inline const void *of_get_property(const struct device_node
*node
,
499 static inline struct device_node
*of_get_cpu_node(int cpu
,
500 unsigned int *thread
)
505 static inline int of_property_read_u64(const struct device_node
*np
,
506 const char *propname
, u64
*out_value
)
511 static inline int of_property_match_string(struct device_node
*np
,
512 const char *propname
,
518 static inline struct device_node
*of_parse_phandle(const struct device_node
*np
,
519 const char *phandle_name
,
525 static inline int of_parse_phandle_with_args(struct device_node
*np
,
526 const char *list_name
,
527 const char *cells_name
,
529 struct of_phandle_args
*out_args
)
534 static inline int of_parse_phandle_with_fixed_args(const struct device_node
*np
,
535 const char *list_name
, int cells_count
, int index
,
536 struct of_phandle_args
*out_args
)
541 static inline int of_count_phandle_with_args(struct device_node
*np
,
542 const char *list_name
,
543 const char *cells_name
)
548 static inline int of_alias_get_id(struct device_node
*np
, const char *stem
)
553 static inline int of_machine_is_compatible(const char *compat
)
558 static inline bool of_console_check(const struct device_node
*dn
, const char *name
, int index
)
563 static inline const __be32
*of_prop_next_u32(struct property
*prop
,
564 const __be32
*cur
, u32
*pu
)
569 static inline const char *of_prop_next_string(struct property
*prop
,
575 #define of_match_ptr(_ptr) NULL
576 #define of_match_node(_matches, _node) NULL
577 #endif /* CONFIG_OF */
579 #if defined(CONFIG_OF) && defined(CONFIG_NUMA)
580 extern int of_node_to_nid(struct device_node
*np
);
582 static inline int of_node_to_nid(struct device_node
*device
) { return 0; }
585 static inline struct device_node
*of_find_matching_node(
586 struct device_node
*from
,
587 const struct of_device_id
*matches
)
589 return of_find_matching_node_and_match(from
, matches
, NULL
);
593 * of_property_count_u8_elems - Count the number of u8 elements in a property
595 * @np: device node from which the property value is to be read.
596 * @propname: name of the property to be searched.
598 * Search for a property in a device node and count the number of u8 elements
599 * in it. Returns number of elements on sucess, -EINVAL if the property does
600 * not exist or its length does not match a multiple of u8 and -ENODATA if the
601 * property does not have a value.
603 static inline int of_property_count_u8_elems(const struct device_node
*np
,
604 const char *propname
)
606 return of_property_count_elems_of_size(np
, propname
, sizeof(u8
));
610 * of_property_count_u16_elems - Count the number of u16 elements in a property
612 * @np: device node from which the property value is to be read.
613 * @propname: name of the property to be searched.
615 * Search for a property in a device node and count the number of u16 elements
616 * in it. Returns number of elements on sucess, -EINVAL if the property does
617 * not exist or its length does not match a multiple of u16 and -ENODATA if the
618 * property does not have a value.
620 static inline int of_property_count_u16_elems(const struct device_node
*np
,
621 const char *propname
)
623 return of_property_count_elems_of_size(np
, propname
, sizeof(u16
));
627 * of_property_count_u32_elems - Count the number of u32 elements in a property
629 * @np: device node from which the property value is to be read.
630 * @propname: name of the property to be searched.
632 * Search for a property in a device node and count the number of u32 elements
633 * in it. Returns number of elements on sucess, -EINVAL if the property does
634 * not exist or its length does not match a multiple of u32 and -ENODATA if the
635 * property does not have a value.
637 static inline int of_property_count_u32_elems(const struct device_node
*np
,
638 const char *propname
)
640 return of_property_count_elems_of_size(np
, propname
, sizeof(u32
));
644 * of_property_count_u64_elems - Count the number of u64 elements in a property
646 * @np: device node from which the property value is to be read.
647 * @propname: name of the property to be searched.
649 * Search for a property in a device node and count the number of u64 elements
650 * in it. Returns number of elements on sucess, -EINVAL if the property does
651 * not exist or its length does not match a multiple of u64 and -ENODATA if the
652 * property does not have a value.
654 static inline int of_property_count_u64_elems(const struct device_node
*np
,
655 const char *propname
)
657 return of_property_count_elems_of_size(np
, propname
, sizeof(u64
));
661 * of_property_read_string_array() - Read an array of strings from a multiple
663 * @np: device node from which the property value is to be read.
664 * @propname: name of the property to be searched.
665 * @out_strs: output array of string pointers.
666 * @sz: number of array elements to read.
668 * Search for a property in a device tree node and retrieve a list of
669 * terminated string values (pointer to data, not a copy) in that property.
671 * If @out_strs is NULL, the number of strings in the property is returned.
673 static inline int of_property_read_string_array(struct device_node
*np
,
674 const char *propname
, const char **out_strs
,
677 return of_property_read_string_helper(np
, propname
, out_strs
, sz
, 0);
681 * of_property_count_strings() - Find and return the number of strings from a
682 * multiple strings property.
683 * @np: device node from which the property value is to be read.
684 * @propname: name of the property to be searched.
686 * Search for a property in a device tree node and retrieve the number of null
687 * terminated string contain in it. Returns the number of strings on
688 * success, -EINVAL if the property does not exist, -ENODATA if property
689 * does not have a value, and -EILSEQ if the string is not null-terminated
690 * within the length of the property data.
692 static inline int of_property_count_strings(struct device_node
*np
,
693 const char *propname
)
695 return of_property_read_string_helper(np
, propname
, NULL
, 0, 0);
699 * of_property_read_string_index() - Find and read a string from a multiple
701 * @np: device node from which the property value is to be read.
702 * @propname: name of the property to be searched.
703 * @index: index of the string in the list of strings
704 * @out_string: pointer to null terminated return string, modified only if
707 * Search for a property in a device tree node and retrieve a null
708 * terminated string value (pointer to data, not a copy) in the list of strings
709 * contained in that property.
710 * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
711 * property does not have a value, and -EILSEQ if the string is not
712 * null-terminated within the length of the property data.
714 * The out_string pointer is modified only if a valid string can be decoded.
716 static inline int of_property_read_string_index(struct device_node
*np
,
717 const char *propname
,
718 int index
, const char **output
)
720 int rc
= of_property_read_string_helper(np
, propname
, output
, 1, index
);
721 return rc
< 0 ? rc
: 0;
725 * of_property_read_bool - Findfrom a property
726 * @np: device node from which the property value is to be read.
727 * @propname: name of the property to be searched.
729 * Search for a property in a device node.
730 * Returns true if the property exist false otherwise.
732 static inline bool of_property_read_bool(const struct device_node
*np
,
733 const char *propname
)
735 struct property
*prop
= of_find_property(np
, propname
, NULL
);
737 return prop
? true : false;
740 static inline int of_property_read_u8(const struct device_node
*np
,
741 const char *propname
,
744 return of_property_read_u8_array(np
, propname
, out_value
, 1);
747 static inline int of_property_read_u16(const struct device_node
*np
,
748 const char *propname
,
751 return of_property_read_u16_array(np
, propname
, out_value
, 1);
754 static inline int of_property_read_u32(const struct device_node
*np
,
755 const char *propname
,
758 return of_property_read_u32_array(np
, propname
, out_value
, 1);
761 static inline int of_property_read_s32(const struct device_node
*np
,
762 const char *propname
,
765 return of_property_read_u32(np
, propname
, (u32
*) out_value
);
768 #define of_property_for_each_u32(np, propname, prop, p, u) \
769 for (prop = of_find_property(np, propname, NULL), \
770 p = of_prop_next_u32(prop, NULL, &u); \
772 p = of_prop_next_u32(prop, p, &u))
774 #define of_property_for_each_string(np, propname, prop, s) \
775 for (prop = of_find_property(np, propname, NULL), \
776 s = of_prop_next_string(prop, NULL); \
778 s = of_prop_next_string(prop, s))
780 #define for_each_node_by_name(dn, name) \
781 for (dn = of_find_node_by_name(NULL, name); dn; \
782 dn = of_find_node_by_name(dn, name))
783 #define for_each_node_by_type(dn, type) \
784 for (dn = of_find_node_by_type(NULL, type); dn; \
785 dn = of_find_node_by_type(dn, type))
786 #define for_each_compatible_node(dn, type, compatible) \
787 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
788 dn = of_find_compatible_node(dn, type, compatible))
789 #define for_each_matching_node(dn, matches) \
790 for (dn = of_find_matching_node(NULL, matches); dn; \
791 dn = of_find_matching_node(dn, matches))
792 #define for_each_matching_node_and_match(dn, matches, match) \
793 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
794 dn; dn = of_find_matching_node_and_match(dn, matches, match))
796 #define for_each_child_of_node(parent, child) \
797 for (child = of_get_next_child(parent, NULL); child != NULL; \
798 child = of_get_next_child(parent, child))
799 #define for_each_available_child_of_node(parent, child) \
800 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
801 child = of_get_next_available_child(parent, child))
803 #define for_each_node_with_property(dn, prop_name) \
804 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
805 dn = of_find_node_with_property(dn, prop_name))
807 static inline int of_get_child_count(const struct device_node
*np
)
809 struct device_node
*child
;
812 for_each_child_of_node(np
, child
)
818 static inline int of_get_available_child_count(const struct device_node
*np
)
820 struct device_node
*child
;
823 for_each_available_child_of_node(np
, child
)
830 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
831 static const struct of_device_id __of_table_##name \
832 __used __section(__##table##_of_table) \
833 = { .compatible = compat, \
834 .data = (fn == (fn_type)NULL) ? fn : fn }
836 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
837 static const struct of_device_id __of_table_##name \
838 __attribute__((unused)) \
839 = { .compatible = compat, \
840 .data = (fn == (fn_type)NULL) ? fn : fn }
843 typedef int (*of_init_fn_2
)(struct device_node
*, struct device_node
*);
844 typedef void (*of_init_fn_1
)(struct device_node
*);
846 #define OF_DECLARE_1(table, name, compat, fn) \
847 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
848 #define OF_DECLARE_2(table, name, compat, fn) \
849 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
852 * struct of_changeset_entry - Holds a changeset entry
854 * @node: list_head for the log list
855 * @action: notifier action
856 * @np: pointer to the device node affected
857 * @prop: pointer to the property affected
858 * @old_prop: hold a pointer to the original property
860 * Every modification of the device tree during a changeset
861 * is held in a list of of_changeset_entry structures.
862 * That way we can recover from a partial application, or we can
863 * revert the changeset
865 struct of_changeset_entry
{
866 struct list_head node
;
867 unsigned long action
;
868 struct device_node
*np
;
869 struct property
*prop
;
870 struct property
*old_prop
;
874 * struct of_changeset - changeset tracker structure
876 * @entries: list_head for the changeset entries
878 * changesets are a convenient way to apply bulk changes to the
879 * live tree. In case of an error, changes are rolled-back.
880 * changesets live on after initial application, and if not
881 * destroyed after use, they can be reverted in one single call.
883 struct of_changeset
{
884 struct list_head entries
;
887 enum of_reconfig_change
{
888 OF_RECONFIG_NO_CHANGE
= 0,
889 OF_RECONFIG_CHANGE_ADD
,
890 OF_RECONFIG_CHANGE_REMOVE
,
893 #ifdef CONFIG_OF_DYNAMIC
894 extern int of_reconfig_notifier_register(struct notifier_block
*);
895 extern int of_reconfig_notifier_unregister(struct notifier_block
*);
896 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data
*rd
);
897 extern int of_reconfig_get_state_change(unsigned long action
,
898 struct of_reconfig_data
*arg
);
900 extern void of_changeset_init(struct of_changeset
*ocs
);
901 extern void of_changeset_destroy(struct of_changeset
*ocs
);
902 extern int of_changeset_apply(struct of_changeset
*ocs
);
903 extern int of_changeset_revert(struct of_changeset
*ocs
);
904 extern int of_changeset_action(struct of_changeset
*ocs
,
905 unsigned long action
, struct device_node
*np
,
906 struct property
*prop
);
908 static inline int of_changeset_attach_node(struct of_changeset
*ocs
,
909 struct device_node
*np
)
911 return of_changeset_action(ocs
, OF_RECONFIG_ATTACH_NODE
, np
, NULL
);
914 static inline int of_changeset_detach_node(struct of_changeset
*ocs
,
915 struct device_node
*np
)
917 return of_changeset_action(ocs
, OF_RECONFIG_DETACH_NODE
, np
, NULL
);
920 static inline int of_changeset_add_property(struct of_changeset
*ocs
,
921 struct device_node
*np
, struct property
*prop
)
923 return of_changeset_action(ocs
, OF_RECONFIG_ADD_PROPERTY
, np
, prop
);
926 static inline int of_changeset_remove_property(struct of_changeset
*ocs
,
927 struct device_node
*np
, struct property
*prop
)
929 return of_changeset_action(ocs
, OF_RECONFIG_REMOVE_PROPERTY
, np
, prop
);
932 static inline int of_changeset_update_property(struct of_changeset
*ocs
,
933 struct device_node
*np
, struct property
*prop
)
935 return of_changeset_action(ocs
, OF_RECONFIG_UPDATE_PROPERTY
, np
, prop
);
937 #else /* CONFIG_OF_DYNAMIC */
938 static inline int of_reconfig_notifier_register(struct notifier_block
*nb
)
942 static inline int of_reconfig_notifier_unregister(struct notifier_block
*nb
)
946 static inline int of_reconfig_notify(unsigned long action
,
947 struct of_reconfig_data
*arg
)
951 static inline int of_reconfig_get_state_change(unsigned long action
,
952 struct of_reconfig_data
*arg
)
956 #endif /* CONFIG_OF_DYNAMIC */
958 /* CONFIG_OF_RESOLVE api */
959 extern int of_resolve_phandles(struct device_node
*tree
);
965 #ifdef CONFIG_OF_OVERLAY
967 /* ID based overlays; the API for external users */
968 int of_overlay_create(struct device_node
*tree
);
969 int of_overlay_destroy(int id
);
970 int of_overlay_destroy_all(void);
974 static inline int of_overlay_create(struct device_node
*tree
)
979 static inline int of_overlay_destroy(int id
)
984 static inline int of_overlay_destroy_all(void)
991 #endif /* _LINUX_OF_H */