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 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
242 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
244 static inline const char *of_node_full_name(const struct device_node
*np
)
246 return np
? np
->full_name
: "<no-node>";
249 #define for_each_of_allnodes_from(from, dn) \
250 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
251 #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
252 extern struct device_node
*of_find_node_by_name(struct device_node
*from
,
254 extern struct device_node
*of_find_node_by_type(struct device_node
*from
,
256 extern struct device_node
*of_find_compatible_node(struct device_node
*from
,
257 const char *type
, const char *compat
);
258 extern struct device_node
*of_find_matching_node_and_match(
259 struct device_node
*from
,
260 const struct of_device_id
*matches
,
261 const struct of_device_id
**match
);
263 extern struct device_node
*of_find_node_opts_by_path(const char *path
,
265 static inline struct device_node
*of_find_node_by_path(const char *path
)
267 return of_find_node_opts_by_path(path
, NULL
);
270 extern struct device_node
*of_find_node_by_phandle(phandle handle
);
271 extern struct device_node
*of_get_parent(const struct device_node
*node
);
272 extern struct device_node
*of_get_next_parent(struct device_node
*node
);
273 extern struct device_node
*of_get_next_child(const struct device_node
*node
,
274 struct device_node
*prev
);
275 extern struct device_node
*of_get_next_available_child(
276 const struct device_node
*node
, struct device_node
*prev
);
278 extern struct device_node
*of_get_child_by_name(const struct device_node
*node
,
282 extern struct device_node
*of_find_next_cache_node(const struct device_node
*);
283 extern struct device_node
*of_find_node_with_property(
284 struct device_node
*from
, const char *prop_name
);
286 extern struct property
*of_find_property(const struct device_node
*np
,
289 extern int of_property_count_elems_of_size(const struct device_node
*np
,
290 const char *propname
, int elem_size
);
291 extern int of_property_read_u32_index(const struct device_node
*np
,
292 const char *propname
,
293 u32 index
, u32
*out_value
);
294 extern int of_property_read_u8_array(const struct device_node
*np
,
295 const char *propname
, u8
*out_values
, size_t sz
);
296 extern int of_property_read_u16_array(const struct device_node
*np
,
297 const char *propname
, u16
*out_values
, size_t sz
);
298 extern int of_property_read_u32_array(const struct device_node
*np
,
299 const char *propname
,
302 extern int of_property_read_u64(const struct device_node
*np
,
303 const char *propname
, u64
*out_value
);
304 extern int of_property_read_u64_array(const struct device_node
*np
,
305 const char *propname
,
309 extern int of_property_read_string(const struct device_node
*np
,
310 const char *propname
,
311 const char **out_string
);
312 extern int of_property_match_string(const struct device_node
*np
,
313 const char *propname
,
315 extern int of_property_read_string_helper(const struct device_node
*np
,
316 const char *propname
,
317 const char **out_strs
, size_t sz
, int index
);
318 extern int of_device_is_compatible(const struct device_node
*device
,
320 extern int of_device_compatible_match(struct device_node
*device
,
321 const char *const *compat
);
322 extern bool of_device_is_available(const struct device_node
*device
);
323 extern bool of_device_is_big_endian(const struct device_node
*device
);
324 extern const void *of_get_property(const struct device_node
*node
,
327 extern struct device_node
*of_get_cpu_node(int cpu
, unsigned int *thread
);
328 #define for_each_property_of_node(dn, pp) \
329 for (pp = dn->properties; pp != NULL; pp = pp->next)
331 extern int of_n_addr_cells(struct device_node
*np
);
332 extern int of_n_size_cells(struct device_node
*np
);
333 extern const struct of_device_id
*of_match_node(
334 const struct of_device_id
*matches
, const struct device_node
*node
);
335 extern int of_modalias_node(struct device_node
*node
, char *modalias
, int len
);
336 extern void of_print_phandle_args(const char *msg
, const struct of_phandle_args
*args
);
337 extern struct device_node
*of_parse_phandle(const struct device_node
*np
,
338 const char *phandle_name
,
340 extern int of_parse_phandle_with_args(const struct device_node
*np
,
341 const char *list_name
, const char *cells_name
, int index
,
342 struct of_phandle_args
*out_args
);
343 extern int of_parse_phandle_with_fixed_args(const struct device_node
*np
,
344 const char *list_name
, int cells_count
, int index
,
345 struct of_phandle_args
*out_args
);
346 extern int of_count_phandle_with_args(const struct device_node
*np
,
347 const char *list_name
, const char *cells_name
);
349 /* phandle iterator functions */
350 extern int of_phandle_iterator_init(struct of_phandle_iterator
*it
,
351 const struct device_node
*np
,
352 const char *list_name
,
353 const char *cells_name
,
356 extern int of_phandle_iterator_next(struct of_phandle_iterator
*it
);
357 extern int of_phandle_iterator_args(struct of_phandle_iterator
*it
,
361 extern void of_alias_scan(void * (*dt_alloc
)(u64 size
, u64 align
));
362 extern int of_alias_get_id(struct device_node
*np
, const char *stem
);
363 extern int of_alias_get_highest_id(const char *stem
);
365 extern int of_machine_is_compatible(const char *compat
);
367 extern int of_add_property(struct device_node
*np
, struct property
*prop
);
368 extern int of_remove_property(struct device_node
*np
, struct property
*prop
);
369 extern int of_update_property(struct device_node
*np
, struct property
*newprop
);
371 /* For updating the device tree at runtime */
372 #define OF_RECONFIG_ATTACH_NODE 0x0001
373 #define OF_RECONFIG_DETACH_NODE 0x0002
374 #define OF_RECONFIG_ADD_PROPERTY 0x0003
375 #define OF_RECONFIG_REMOVE_PROPERTY 0x0004
376 #define OF_RECONFIG_UPDATE_PROPERTY 0x0005
378 extern int of_attach_node(struct device_node
*);
379 extern int of_detach_node(struct device_node
*);
381 #define of_match_ptr(_ptr) (_ptr)
384 * struct property *prop;
388 * of_property_for_each_u32(np, "propname", prop, p, u)
389 * printk("U32 value: %x\n", u);
391 const __be32
*of_prop_next_u32(struct property
*prop
, const __be32
*cur
,
394 * struct property *prop;
397 * of_property_for_each_string(np, "propname", prop, s)
398 * printk("String value: %s\n", s);
400 const char *of_prop_next_string(struct property
*prop
, const char *cur
);
402 bool of_console_check(struct device_node
*dn
, char *name
, int index
);
404 #else /* CONFIG_OF */
406 static inline void of_core_init(void)
410 static inline bool is_of_node(struct fwnode_handle
*fwnode
)
415 static inline struct device_node
*to_of_node(struct fwnode_handle
*fwnode
)
420 static inline const char* of_node_full_name(const struct device_node
*np
)
425 static inline struct device_node
*of_find_node_by_name(struct device_node
*from
,
431 static inline struct device_node
*of_find_node_by_type(struct device_node
*from
,
437 static inline struct device_node
*of_find_matching_node_and_match(
438 struct device_node
*from
,
439 const struct of_device_id
*matches
,
440 const struct of_device_id
**match
)
445 static inline struct device_node
*of_find_node_by_path(const char *path
)
450 static inline struct device_node
*of_find_node_opts_by_path(const char *path
,
456 static inline struct device_node
*of_find_node_by_phandle(phandle handle
)
461 static inline struct device_node
*of_get_parent(const struct device_node
*node
)
466 static inline struct device_node
*of_get_next_child(
467 const struct device_node
*node
, struct device_node
*prev
)
472 static inline struct device_node
*of_get_next_available_child(
473 const struct device_node
*node
, struct device_node
*prev
)
478 static inline struct device_node
*of_find_node_with_property(
479 struct device_node
*from
, const char *prop_name
)
484 static inline bool of_have_populated_dt(void)
489 static inline struct device_node
*of_get_child_by_name(
490 const struct device_node
*node
,
496 static inline int of_device_is_compatible(const struct device_node
*device
,
502 static inline bool of_device_is_available(const struct device_node
*device
)
507 static inline bool of_device_is_big_endian(const struct device_node
*device
)
512 static inline struct property
*of_find_property(const struct device_node
*np
,
519 static inline struct device_node
*of_find_compatible_node(
520 struct device_node
*from
,
527 static inline int of_property_count_elems_of_size(const struct device_node
*np
,
528 const char *propname
, int elem_size
)
533 static inline int of_property_read_u32_index(const struct device_node
*np
,
534 const char *propname
, u32 index
, u32
*out_value
)
539 static inline int of_property_read_u8_array(const struct device_node
*np
,
540 const char *propname
, u8
*out_values
, size_t sz
)
545 static inline int of_property_read_u16_array(const struct device_node
*np
,
546 const char *propname
, u16
*out_values
, size_t sz
)
551 static inline int of_property_read_u32_array(const struct device_node
*np
,
552 const char *propname
,
553 u32
*out_values
, size_t sz
)
558 static inline int of_property_read_u64_array(const struct device_node
*np
,
559 const char *propname
,
560 u64
*out_values
, size_t sz
)
565 static inline int of_property_read_string(const struct device_node
*np
,
566 const char *propname
,
567 const char **out_string
)
572 static inline int of_property_read_string_helper(const struct device_node
*np
,
573 const char *propname
,
574 const char **out_strs
, size_t sz
, int index
)
579 static inline const void *of_get_property(const struct device_node
*node
,
586 static inline struct device_node
*of_get_cpu_node(int cpu
,
587 unsigned int *thread
)
592 static inline int of_property_read_u64(const struct device_node
*np
,
593 const char *propname
, u64
*out_value
)
598 static inline int of_property_match_string(const struct device_node
*np
,
599 const char *propname
,
605 static inline struct device_node
*of_parse_phandle(const struct device_node
*np
,
606 const char *phandle_name
,
612 static inline int of_parse_phandle_with_args(const struct device_node
*np
,
613 const char *list_name
,
614 const char *cells_name
,
616 struct of_phandle_args
*out_args
)
621 static inline int of_parse_phandle_with_fixed_args(const struct device_node
*np
,
622 const char *list_name
, int cells_count
, int index
,
623 struct of_phandle_args
*out_args
)
628 static inline int of_count_phandle_with_args(struct device_node
*np
,
629 const char *list_name
,
630 const char *cells_name
)
635 static inline int of_phandle_iterator_init(struct of_phandle_iterator
*it
,
636 const struct device_node
*np
,
637 const char *list_name
,
638 const char *cells_name
,
644 static inline int of_phandle_iterator_next(struct of_phandle_iterator
*it
)
649 static inline int of_phandle_iterator_args(struct of_phandle_iterator
*it
,
656 static inline int of_alias_get_id(struct device_node
*np
, const char *stem
)
661 static inline int of_alias_get_highest_id(const char *stem
)
666 static inline int of_machine_is_compatible(const char *compat
)
671 static inline bool of_console_check(const struct device_node
*dn
, const char *name
, int index
)
676 static inline const __be32
*of_prop_next_u32(struct property
*prop
,
677 const __be32
*cur
, u32
*pu
)
682 static inline const char *of_prop_next_string(struct property
*prop
,
688 static inline int of_node_check_flag(struct device_node
*n
, unsigned long flag
)
693 static inline int of_node_test_and_set_flag(struct device_node
*n
,
699 static inline void of_node_set_flag(struct device_node
*n
, unsigned long flag
)
703 static inline void of_node_clear_flag(struct device_node
*n
, unsigned long flag
)
707 static inline int of_property_check_flag(struct property
*p
, unsigned long flag
)
712 static inline void of_property_set_flag(struct property
*p
, unsigned long flag
)
716 static inline void of_property_clear_flag(struct property
*p
, unsigned long flag
)
720 #define of_match_ptr(_ptr) NULL
721 #define of_match_node(_matches, _node) NULL
722 #endif /* CONFIG_OF */
724 /* Default string compare functions, Allow arch asm/prom.h to override */
725 #if !defined(of_compat_cmp)
726 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
727 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
728 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
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 */