blob: dc6e39696b64c8e925601f598b9cdab5684f1970 [file] [log] [blame]
Stephen Rothwell76c1ce72007-05-01 16:19:07 +10001#ifndef _LINUX_OF_H
2#define _LINUX_OF_H
3/*
4 * Definitions for talking to the Open Firmware PROM on
5 * Power Macintosh and other computers.
6 *
7 * Copyright (C) 1996-2005 Paul Mackerras.
8 *
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.
12 *
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.
17 */
18#include <linux/types.h>
Jiri Slaby1977f032007-10-18 23:40:25 -070019#include <linux/bitops.h>
Kalle Valoe51130c2011-10-06 15:40:44 +030020#include <linux/errno.h>
Grant Likely75b57ec2014-02-20 18:02:11 +000021#include <linux/kobject.h>
Grant Likely283029d2008-01-09 06:20:40 +110022#include <linux/mod_devicetable.h>
Grant Likely0d351c32010-02-14 14:13:57 -070023#include <linux/spinlock.h>
Paul Mundt5ca4db62012-06-03 22:04:34 -070024#include <linux/topology.h>
Nathan Fontenot1cf3d8b2012-10-02 16:57:57 +000025#include <linux/notifier.h>
Rafael J. Wysockib31384f2014-11-04 01:28:56 +010026#include <linux/property.h>
Pantelis Antoniou7518b5892014-10-28 22:35:58 +020027#include <linux/list.h>
Stephen Rothwell76c1ce72007-05-01 16:19:07 +100028
Jeremy Kerr2e89e682010-01-30 01:41:49 -070029#include <asm/byteorder.h>
Paul Gortmakerd0a99402011-10-29 10:17:06 -040030#include <asm/errno.h>
Jeremy Kerr2e89e682010-01-30 01:41:49 -070031
Grant Likely731581e2009-10-15 10:57:46 -060032typedef u32 phandle;
33typedef u32 ihandle;
34
35struct property {
36 char *name;
37 int length;
38 void *value;
39 struct property *next;
40 unsigned long _flags;
41 unsigned int unique_id;
Grant Likely75b57ec2014-02-20 18:02:11 +000042 struct bin_attribute attr;
Grant Likely731581e2009-10-15 10:57:46 -060043};
44
Grant Likely6f192492009-10-15 10:57:49 -060045#if defined(CONFIG_SPARC)
46struct of_irq_controller;
47#endif
48
49struct device_node {
50 const char *name;
51 const char *type;
Grant Likely6016a362010-01-28 14:06:53 -070052 phandle phandle;
Grant Likelyc22618a2012-11-14 22:37:12 +000053 const char *full_name;
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +010054 struct fwnode_handle fwnode;
Grant Likely6f192492009-10-15 10:57:49 -060055
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;
Grant Likely75b57ec2014-02-20 18:02:11 +000061 struct kobject kobj;
Grant Likely6f192492009-10-15 10:57:49 -060062 unsigned long _flags;
63 void *data;
64#if defined(CONFIG_SPARC)
Grant Likelyc22618a2012-11-14 22:37:12 +000065 const char *path_component_name;
Grant Likely6f192492009-10-15 10:57:49 -060066 unsigned int unique_id;
67 struct of_irq_controller *irq_trans;
68#endif
69};
70
Andreas Herrmannb66548e2014-01-17 12:08:30 +010071#define MAX_PHANDLE_ARGS 16
Grant Likely15c9a0a2011-12-12 09:25:57 -070072struct of_phandle_args {
73 struct device_node *np;
74 int args_count;
75 uint32_t args[MAX_PHANDLE_ARGS];
76};
77
Grant Likelyf5242e52014-11-24 17:58:01 +000078struct of_reconfig_data {
79 struct device_node *dn;
80 struct property *prop;
81 struct property *old_prop;
82};
83
Pantelis Antoniou0829f6d2013-12-13 20:08:59 +020084/* initialize a node */
85extern struct kobj_type of_node_ktype;
86static inline void of_node_init(struct device_node *node)
87{
88 kobject_init(&node->kobj, &of_node_ktype);
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +010089 node->fwnode.type = FWNODE_OF;
Pantelis Antoniou0829f6d2013-12-13 20:08:59 +020090}
91
92/* true when node is initialized */
93static inline int of_node_is_initialized(struct device_node *node)
94{
95 return node && node->kobj.state_initialized;
96}
97
98/* true when node is attached (i.e. present on sysfs) */
99static inline int of_node_is_attached(struct device_node *node)
100{
101 return node && node->kobj.state_in_sysfs;
102}
103
Grant Likely0f22dd32012-02-15 20:38:40 -0700104#ifdef CONFIG_OF_DYNAMIC
105extern struct device_node *of_node_get(struct device_node *node);
106extern void of_node_put(struct device_node *node);
107#else /* CONFIG_OF_DYNAMIC */
Rob Herring3ecdd052011-12-13 09:13:54 -0600108/* Dummy ref counting routines - to be implemented later */
109static inline struct device_node *of_node_get(struct device_node *node)
110{
111 return node;
112}
Grant Likely0f22dd32012-02-15 20:38:40 -0700113static inline void of_node_put(struct device_node *node) { }
114#endif /* !CONFIG_OF_DYNAMIC */
Rob Herring3ecdd052011-12-13 09:13:54 -0600115
Grant Likely41f88002009-11-23 20:07:01 -0700116/* Pointer for first entry in chain of all nodes. */
Grant Likely5063e252014-10-03 16:28:27 +0100117extern struct device_node *of_root;
Grant Likelyfc0bdae2010-02-14 07:13:55 -0700118extern struct device_node *of_chosen;
Shawn Guo611cad72011-08-15 15:28:14 +0800119extern struct device_node *of_aliases;
Grant Likelya752ee52014-03-28 08:12:18 -0700120extern struct device_node *of_stdout;
Thomas Gleixnerd6d3c4e2013-02-06 15:30:56 -0500121extern raw_spinlock_t devtree_lock;
Grant Likely41f88002009-11-23 20:07:01 -0700122
Pantelis Antoniou391b4592015-04-24 12:41:56 +0300123/* 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 */
128
Guenter Roeckb1d06b62015-11-06 19:28:22 -0800129#define OF_BAD_ADDR ((u64)-1)
130
Hans de Goede6d09dc62014-11-14 13:26:52 +0100131#ifdef CONFIG_OF
Sudeep Holla194ec932015-05-14 15:28:24 +0100132void of_core_init(void);
133
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100134static inline bool is_of_node(struct fwnode_handle *fwnode)
135{
136 return fwnode && fwnode->type == FWNODE_OF;
137}
138
Alexander Sverdlinc181fb32015-06-22 22:38:53 +0200139static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100140{
Andy Shevchenko4bf01182015-08-10 19:56:46 +0300141 return is_of_node(fwnode) ?
142 container_of(fwnode, struct device_node, fwnode) : NULL;
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100143}
144
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100145static inline bool of_have_populated_dt(void)
146{
Grant Likely5063e252014-10-03 16:28:27 +0100147 return of_root != NULL;
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100148}
149
Andres Salomon035ebef2010-07-13 09:42:26 +0000150static inline bool of_node_is_root(const struct device_node *node)
151{
152 return node && (node->parent == NULL);
153}
154
Grant Likely50436312009-10-15 10:57:58 -0600155static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
156{
157 return test_bit(flag, &n->_flags);
158}
159
Pawel Mollc6e126d2014-05-15 16:55:24 +0100160static inline int of_node_test_and_set_flag(struct device_node *n,
161 unsigned long flag)
162{
163 return test_and_set_bit(flag, &n->_flags);
164}
165
Grant Likely50436312009-10-15 10:57:58 -0600166static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
167{
168 set_bit(flag, &n->_flags);
169}
170
Pantelis Antoniou588453c2013-11-08 17:03:56 +0200171static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
172{
173 clear_bit(flag, &n->_flags);
174}
175
176static inline int of_property_check_flag(struct property *p, unsigned long flag)
177{
178 return test_bit(flag, &p->_flags);
179}
180
181static inline void of_property_set_flag(struct property *p, unsigned long flag)
182{
183 set_bit(flag, &p->_flags);
184}
185
186static inline void of_property_clear_flag(struct property *p, unsigned long flag)
187{
188 clear_bit(flag, &p->_flags);
189}
190
Grant Likely5063e252014-10-03 16:28:27 +0100191extern struct device_node *__of_find_all_nodes(struct device_node *prev);
Grant Likelye91edcf2009-10-15 10:58:09 -0600192extern struct device_node *of_find_all_nodes(struct device_node *prev);
193
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600194/*
Lennert Buytenhek3d6b8822011-02-22 18:18:51 +0100195 * OF address retrieval & translation
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600196 */
197
198/* Helper to read a big number; size is in cells (not bytes) */
Jeremy Kerr2e89e682010-01-30 01:41:49 -0700199static inline u64 of_read_number(const __be32 *cell, int size)
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600200{
201 u64 r = 0;
202 while (size--)
Jeremy Kerr2e89e682010-01-30 01:41:49 -0700203 r = (r << 32) | be32_to_cpu(*(cell++));
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600204 return r;
205}
206
207/* Like of_read_number, but we want an unsigned long result */
Jeremy Kerr2e89e682010-01-30 01:41:49 -0700208static inline unsigned long of_read_ulong(const __be32 *cell, int size)
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600209{
Grant Likely2be09cb2009-11-23 20:16:46 -0700210 /* toss away upper bits if unsigned long is smaller than u64 */
211 return of_read_number(cell, size);
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600212}
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600213
Rob Herringb5b4bb32013-09-07 14:08:20 -0500214#if defined(CONFIG_SPARC)
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000215#include <asm/prom.h>
Rob Herringb5b4bb32013-09-07 14:08:20 -0500216#endif
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000217
Grant Likely7c7b60c2010-02-14 07:13:50 -0700218/* Default #address and #size cells. Allow arch asm/prom.h to override */
219#if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
220#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
221#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
222#endif
223
224/* Default string compare functions, Allow arch asm/prom.h to override */
225#if !defined(of_compat_cmp)
Grant Likely19761522010-03-18 07:30:31 -0600226#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
Grant Likely7c7b60c2010-02-14 07:13:50 -0700227#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
228#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
229#endif
230
Grant Likely61e955d2009-10-15 10:57:51 -0600231#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
232#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
233
Steffen Trumtrarc0a05bf2012-12-18 11:32:03 +0100234static inline const char *of_node_full_name(const struct device_node *np)
Grant Likely74a7f082012-06-15 11:50:25 -0600235{
236 return np ? np->full_name : "<no-node>";
237}
238
Grant Likely5063e252014-10-03 16:28:27 +0100239#define for_each_of_allnodes_from(from, dn) \
240 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
241#define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000242extern struct device_node *of_find_node_by_name(struct device_node *from,
243 const char *name);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000244extern struct device_node *of_find_node_by_type(struct device_node *from,
245 const char *type);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000246extern struct device_node *of_find_compatible_node(struct device_node *from,
247 const char *type, const char *compat);
Stephen Warren50c8af42012-11-20 16:12:20 -0700248extern struct device_node *of_find_matching_node_and_match(
249 struct device_node *from,
250 const struct of_device_id *matches,
251 const struct of_device_id **match);
Rob Herring662372e2014-02-03 08:53:44 -0600252
Leif Lindholm75c28c02014-11-28 11:34:28 +0000253extern struct device_node *of_find_node_opts_by_path(const char *path,
254 const char **opts);
255static inline struct device_node *of_find_node_by_path(const char *path)
256{
257 return of_find_node_opts_by_path(path, NULL);
258}
259
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000260extern struct device_node *of_find_node_by_phandle(phandle handle);
261extern struct device_node *of_get_parent(const struct device_node *node);
Michael Ellermanf4eb0102007-10-26 16:54:31 +1000262extern struct device_node *of_get_next_parent(struct device_node *node);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000263extern struct device_node *of_get_next_child(const struct device_node *node,
264 struct device_node *prev);
Timur Tabi32961932012-08-14 13:20:23 +0000265extern struct device_node *of_get_next_available_child(
266 const struct device_node *node, struct device_node *prev);
267
Srinivas Kandagatla9c197612012-09-18 08:10:28 +0100268extern struct device_node *of_get_child_by_name(const struct device_node *node,
269 const char *name);
Bryan Wu954e04b2013-09-24 10:38:26 -0700270
Sudeep KarkadaNageshaa3e31b42013-09-18 11:53:05 +0100271/* cache lookup */
272extern struct device_node *of_find_next_cache_node(const struct device_node *);
Michael Ellerman1e291b12008-11-12 18:54:42 +0000273extern struct device_node *of_find_node_with_property(
274 struct device_node *from, const char *prop_name);
Michael Ellerman1e291b12008-11-12 18:54:42 +0000275
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000276extern struct property *of_find_property(const struct device_node *np,
277 const char *name,
278 int *lenp);
Heiko Stuebnerad54a0c2014-02-12 01:00:34 +0100279extern int of_property_count_elems_of_size(const struct device_node *np,
280 const char *propname, int elem_size);
Tony Prisk3daf3722013-03-23 17:02:15 +1300281extern int of_property_read_u32_index(const struct device_node *np,
282 const char *propname,
283 u32 index, u32 *out_value);
Viresh Kumarbe193242012-11-20 10:15:19 +0530284extern int of_property_read_u8_array(const struct device_node *np,
285 const char *propname, u8 *out_values, size_t sz);
286extern int of_property_read_u16_array(const struct device_node *np,
287 const char *propname, u16 *out_values, size_t sz);
Rob Herring0e373632011-07-06 15:42:58 -0500288extern int of_property_read_u32_array(const struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100289 const char *propname,
Rob Herring0e373632011-07-06 15:42:58 -0500290 u32 *out_values,
291 size_t sz);
Jamie Iles4cd7f7a2011-09-14 20:49:59 +0100292extern int of_property_read_u64(const struct device_node *np,
293 const char *propname, u64 *out_value);
Rafael J. Wysockib31384f2014-11-04 01:28:56 +0100294extern int of_property_read_u64_array(const struct device_node *np,
295 const char *propname,
296 u64 *out_values,
297 size_t sz);
Rob Herring0e373632011-07-06 15:42:58 -0500298
Jamie Ilesaac285c2011-08-02 15:45:07 +0100299extern int of_property_read_string(struct device_node *np,
300 const char *propname,
301 const char **out_string);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700302extern int of_property_match_string(struct device_node *np,
303 const char *propname,
304 const char *string);
Grant Likelya87fa1d2014-11-03 15:15:35 +0000305extern int of_property_read_string_helper(struct device_node *np,
306 const char *propname,
307 const char **out_strs, size_t sz, int index);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000308extern int of_device_is_compatible(const struct device_node *device,
309 const char *);
Kevin Cernekee53a4ab92014-11-12 12:54:01 -0800310extern bool of_device_is_available(const struct device_node *device);
Kevin Cernekee37786c72015-04-09 13:05:14 -0700311extern bool of_device_is_big_endian(const struct device_node *device);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000312extern const void *of_get_property(const struct device_node *node,
313 const char *name,
314 int *lenp);
Sudeep KarkadaNagesha183912d2013-08-15 14:01:40 +0100315extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
Dong Aisheng8af0da92011-12-22 20:19:24 +0800316#define for_each_property_of_node(dn, pp) \
317 for (pp = dn->properties; pp != NULL; pp = pp->next)
Shawn Guo611cad72011-08-15 15:28:14 +0800318
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000319extern int of_n_addr_cells(struct device_node *np);
320extern int of_n_size_cells(struct device_node *np);
Grant Likely283029d2008-01-09 06:20:40 +1100321extern const struct of_device_id *of_match_node(
322 const struct of_device_id *matches, const struct device_node *node);
Grant Likely3f07af42008-07-25 22:25:13 -0400323extern int of_modalias_node(struct device_node *node, char *modalias, int len);
Grant Likely624cfca2013-10-11 22:05:10 +0100324extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
Steffen Trumtrarb8fbdc42012-11-22 12:16:43 +0100325extern struct device_node *of_parse_phandle(const struct device_node *np,
Grant Likely739649c2009-04-25 12:52:40 +0000326 const char *phandle_name,
327 int index);
Guennadi Liakhovetski93c667c2012-12-10 20:41:30 +0100328extern int of_parse_phandle_with_args(const struct device_node *np,
Anton Vorontsov64b60e02008-10-10 04:43:17 +0000329 const char *list_name, const char *cells_name, int index,
Grant Likely15c9a0a2011-12-12 09:25:57 -0700330 struct of_phandle_args *out_args);
Stephen Warren035fd942013-08-14 15:27:10 -0600331extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
332 const char *list_name, int cells_count, int index,
333 struct of_phandle_args *out_args);
Grant Likelybd69f732013-02-10 22:57:21 +0000334extern int of_count_phandle_with_args(const struct device_node *np,
335 const char *list_name, const char *cells_name);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000336
Shawn Guo611cad72011-08-15 15:28:14 +0800337extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
338extern int of_alias_get_id(struct device_node *np, const char *stem);
Wolfram Sang351d2242015-03-12 17:17:58 +0100339extern int of_alias_get_highest_id(const char *stem);
Shawn Guo611cad72011-08-15 15:28:14 +0800340
Grant Likely21b082e2010-02-14 07:13:38 -0700341extern int of_machine_is_compatible(const char *compat);
342
Nathan Fontenot79d1c712012-10-02 16:58:46 +0000343extern int of_add_property(struct device_node *np, struct property *prop);
344extern int of_remove_property(struct device_node *np, struct property *prop);
345extern int of_update_property(struct device_node *np, struct property *newprop);
Grant Likely21b082e2010-02-14 07:13:38 -0700346
Grant Likelyfcdeb7f2010-01-29 05:04:33 -0700347/* For updating the device tree at runtime */
Nathan Fontenot1cf3d8b2012-10-02 16:57:57 +0000348#define OF_RECONFIG_ATTACH_NODE 0x0001
349#define OF_RECONFIG_DETACH_NODE 0x0002
350#define OF_RECONFIG_ADD_PROPERTY 0x0003
351#define OF_RECONFIG_REMOVE_PROPERTY 0x0004
352#define OF_RECONFIG_UPDATE_PROPERTY 0x0005
353
Nathan Fontenot1cf3d8b2012-10-02 16:57:57 +0000354extern int of_attach_node(struct device_node *);
355extern int of_detach_node(struct device_node *);
Grant Likelyfcdeb7f2010-01-29 05:04:33 -0700356
Ben Dooks3a1e3622011-08-03 10:11:42 +0100357#define of_match_ptr(_ptr) (_ptr)
Stephen Warrenc541adc2012-04-04 09:27:46 -0600358
359/*
360 * struct property *prop;
361 * const __be32 *p;
362 * u32 u;
363 *
364 * of_property_for_each_u32(np, "propname", prop, p, u)
365 * printk("U32 value: %x\n", u);
366 */
367const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
368 u32 *pu);
Stephen Warrenc541adc2012-04-04 09:27:46 -0600369/*
370 * struct property *prop;
371 * const char *s;
372 *
373 * of_property_for_each_string(np, "propname", prop, s)
374 * printk("String value: %s\n", s);
375 */
376const char *of_prop_next_string(struct property *prop, const char *cur);
Stephen Warrenc541adc2012-04-04 09:27:46 -0600377
Grant Likely3482f2c2014-03-27 17:18:55 -0700378bool of_console_check(struct device_node *dn, char *name, int index);
Sascha Hauer5c19e952013-08-05 14:40:44 +0200379
Shawn Guob98c0232011-07-08 16:27:33 +0800380#else /* CONFIG_OF */
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100381
Sudeep Holla194ec932015-05-14 15:28:24 +0100382static inline void of_core_init(void)
383{
384}
385
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100386static inline bool is_of_node(struct fwnode_handle *fwnode)
387{
388 return false;
389}
390
Alexander Sverdlinc181fb32015-06-22 22:38:53 +0200391static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100392{
393 return NULL;
394}
395
Stephen Rothwell4c358e12014-05-15 14:44:30 +1000396static inline const char* of_node_full_name(const struct device_node *np)
Grant Likely74a7f082012-06-15 11:50:25 -0600397{
398 return "<no-node>";
399}
400
Peter Ujfalusi1cc44f42012-09-10 13:46:24 +0300401static inline struct device_node *of_find_node_by_name(struct device_node *from,
402 const char *name)
403{
404 return NULL;
405}
406
Rob Herring662372e2014-02-03 08:53:44 -0600407static inline struct device_node *of_find_node_by_type(struct device_node *from,
408 const char *type)
409{
410 return NULL;
411}
412
413static inline struct device_node *of_find_matching_node_and_match(
414 struct device_node *from,
415 const struct of_device_id *matches,
416 const struct of_device_id **match)
417{
418 return NULL;
419}
420
Alexander Shiyan20cd4772014-04-16 10:49:20 +0400421static inline struct device_node *of_find_node_by_path(const char *path)
422{
423 return NULL;
424}
425
Leif Lindholm75c28c02014-11-28 11:34:28 +0000426static inline struct device_node *of_find_node_opts_by_path(const char *path,
427 const char **opts)
428{
429 return NULL;
430}
431
Suman Annace16b9d2015-06-17 11:53:53 -0500432static inline struct device_node *of_find_node_by_phandle(phandle handle)
433{
434 return NULL;
435}
436
Alexander Shiyan066ec1d2013-04-09 19:47:40 +0400437static inline struct device_node *of_get_parent(const struct device_node *node)
438{
439 return NULL;
440}
441
Rob Herring662372e2014-02-03 08:53:44 -0600442static inline struct device_node *of_get_next_child(
443 const struct device_node *node, struct device_node *prev)
444{
445 return NULL;
446}
447
448static inline struct device_node *of_get_next_available_child(
449 const struct device_node *node, struct device_node *prev)
450{
451 return NULL;
452}
453
454static inline struct device_node *of_find_node_with_property(
455 struct device_node *from, const char *prop_name)
456{
457 return NULL;
458}
459
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100460static inline bool of_have_populated_dt(void)
461{
462 return false;
463}
464
Olof Johansson25c040c2012-10-07 10:40:54 -0700465static inline struct device_node *of_get_child_by_name(
466 const struct device_node *node,
467 const char *name)
468{
469 return NULL;
470}
471
Rajendra Nayak36a09042011-10-10 21:49:35 +0530472static inline int of_device_is_compatible(const struct device_node *device,
473 const char *name)
474{
475 return 0;
476}
477
Kevin Cernekee53a4ab92014-11-12 12:54:01 -0800478static inline bool of_device_is_available(const struct device_node *device)
Rob Herringd7195692013-03-20 16:56:18 -0500479{
Kevin Cernekee53a4ab92014-11-12 12:54:01 -0800480 return false;
Rob Herringd7195692013-03-20 16:56:18 -0500481}
482
Kevin Cernekee37786c72015-04-09 13:05:14 -0700483static inline bool of_device_is_big_endian(const struct device_node *device)
484{
485 return false;
486}
487
Stephen Warrenaba3dff2011-09-21 13:23:10 -0600488static inline struct property *of_find_property(const struct device_node *np,
489 const char *name,
490 int *lenp)
491{
492 return NULL;
493}
494
Shawn Guo2261cc62012-02-15 10:47:42 -0800495static inline struct device_node *of_find_compatible_node(
496 struct device_node *from,
497 const char *type,
498 const char *compat)
499{
500 return NULL;
501}
502
Heiko Stuebnerad54a0c2014-02-12 01:00:34 +0100503static inline int of_property_count_elems_of_size(const struct device_node *np,
504 const char *propname, int elem_size)
505{
506 return -ENOSYS;
507}
508
Tony Prisk3daf3722013-03-23 17:02:15 +1300509static inline int of_property_read_u32_index(const struct device_node *np,
510 const char *propname, u32 index, u32 *out_value)
511{
512 return -ENOSYS;
513}
514
Viresh Kumarbe193242012-11-20 10:15:19 +0530515static inline int of_property_read_u8_array(const struct device_node *np,
516 const char *propname, u8 *out_values, size_t sz)
517{
518 return -ENOSYS;
519}
520
521static inline int of_property_read_u16_array(const struct device_node *np,
522 const char *propname, u16 *out_values, size_t sz)
523{
524 return -ENOSYS;
525}
526
Shawn Guob98c0232011-07-08 16:27:33 +0800527static inline int of_property_read_u32_array(const struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100528 const char *propname,
529 u32 *out_values, size_t sz)
Shawn Guob98c0232011-07-08 16:27:33 +0800530{
531 return -ENOSYS;
532}
533
Rafael J. Wysockib31384f2014-11-04 01:28:56 +0100534static inline int of_property_read_u64_array(const struct device_node *np,
535 const char *propname,
536 u64 *out_values, size_t sz)
537{
538 return -ENOSYS;
539}
540
Shawn Guob98c0232011-07-08 16:27:33 +0800541static inline int of_property_read_string(struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100542 const char *propname,
543 const char **out_string)
Shawn Guob98c0232011-07-08 16:27:33 +0800544{
545 return -ENOSYS;
546}
547
Grant Likelya87fa1d2014-11-03 15:15:35 +0000548static inline int of_property_read_string_helper(struct device_node *np,
549 const char *propname,
550 const char **out_strs, size_t sz, int index)
Benoit Cousson4fcd15a2011-09-27 17:45:43 +0200551{
552 return -ENOSYS;
553}
554
Stephen Warren89272b82011-08-05 16:50:30 -0600555static inline const void *of_get_property(const struct device_node *node,
556 const char *name,
557 int *lenp)
558{
559 return NULL;
560}
561
Sudeep KarkadaNagesha183912d2013-08-15 14:01:40 +0100562static inline struct device_node *of_get_cpu_node(int cpu,
563 unsigned int *thread)
564{
565 return NULL;
566}
567
Jamie Iles4cd7f7a2011-09-14 20:49:59 +0100568static inline int of_property_read_u64(const struct device_node *np,
569 const char *propname, u64 *out_value)
570{
571 return -ENOSYS;
572}
573
Thierry Redingbd3d5502012-04-13 16:18:34 +0200574static inline int of_property_match_string(struct device_node *np,
575 const char *propname,
576 const char *string)
577{
578 return -ENOSYS;
579}
580
Steffen Trumtrarb8fbdc42012-11-22 12:16:43 +0100581static inline struct device_node *of_parse_phandle(const struct device_node *np,
Rajendra Nayak36a09042011-10-10 21:49:35 +0530582 const char *phandle_name,
583 int index)
584{
585 return NULL;
586}
587
Thierry Redinge05e5072012-04-13 16:19:21 +0200588static inline int of_parse_phandle_with_args(struct device_node *np,
589 const char *list_name,
590 const char *cells_name,
591 int index,
592 struct of_phandle_args *out_args)
593{
594 return -ENOSYS;
595}
596
Stephen Warren035fd942013-08-14 15:27:10 -0600597static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
598 const char *list_name, int cells_count, int index,
599 struct of_phandle_args *out_args)
600{
601 return -ENOSYS;
602}
603
Grant Likelybd69f732013-02-10 22:57:21 +0000604static inline int of_count_phandle_with_args(struct device_node *np,
605 const char *list_name,
606 const char *cells_name)
607{
608 return -ENOSYS;
609}
610
Nicolas Ferreed5f8862011-10-27 11:07:28 +0200611static inline int of_alias_get_id(struct device_node *np, const char *stem)
612{
613 return -ENOSYS;
614}
615
Wolfram Sang351d2242015-03-12 17:17:58 +0100616static inline int of_alias_get_highest_id(const char *stem)
617{
618 return -ENOSYS;
619}
620
Stephen Warren50e07f82011-10-25 14:01:26 +0200621static inline int of_machine_is_compatible(const char *compat)
622{
623 return 0;
624}
625
Grant Likely3482f2c2014-03-27 17:18:55 -0700626static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
Sascha Hauer5c19e952013-08-05 14:40:44 +0200627{
Grant Likely3482f2c2014-03-27 17:18:55 -0700628 return false;
Sascha Hauer5c19e952013-08-05 14:40:44 +0200629}
630
Sebastian Andrzej Siewior2adfffa2013-06-17 16:48:13 +0200631static inline const __be32 *of_prop_next_u32(struct property *prop,
632 const __be32 *cur, u32 *pu)
633{
634 return NULL;
635}
636
637static inline const char *of_prop_next_string(struct property *prop,
638 const char *cur)
639{
640 return NULL;
641}
642
Pantelis Antoniou0384e8c2015-01-21 19:05:57 +0200643static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
644{
645 return 0;
646}
647
648static inline int of_node_test_and_set_flag(struct device_node *n,
649 unsigned long flag)
650{
651 return 0;
652}
653
654static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
655{
656}
657
658static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
659{
660}
661
662static inline int of_property_check_flag(struct property *p, unsigned long flag)
663{
664 return 0;
665}
666
667static inline void of_property_set_flag(struct property *p, unsigned long flag)
668{
669}
670
671static inline void of_property_clear_flag(struct property *p, unsigned long flag)
672{
673}
674
Ben Dooks3a1e3622011-08-03 10:11:42 +0100675#define of_match_ptr(_ptr) NULL
Nicolas Ferre5762c202011-10-24 11:53:32 +0200676#define of_match_node(_matches, _node) NULL
Jeremy Kerr9dfbf202010-02-14 07:13:43 -0700677#endif /* CONFIG_OF */
Shawn Guob98c0232011-07-08 16:27:33 +0800678
Rob Herring0c3f0612013-09-17 10:42:50 -0500679#if defined(CONFIG_OF) && defined(CONFIG_NUMA)
680extern int of_node_to_nid(struct device_node *np);
681#else
Konstantin Khlebnikovc8fff7b2015-04-08 19:59:20 +0300682static inline int of_node_to_nid(struct device_node *device)
683{
684 return NUMA_NO_NODE;
685}
Paul Mundt5ca4db62012-06-03 22:04:34 -0700686#endif
687
Rob Herring662372e2014-02-03 08:53:44 -0600688static inline struct device_node *of_find_matching_node(
689 struct device_node *from,
690 const struct of_device_id *matches)
691{
692 return of_find_matching_node_and_match(from, matches, NULL);
693}
694
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800695/**
Heiko Stuebnerad54a0c2014-02-12 01:00:34 +0100696 * of_property_count_u8_elems - Count the number of u8 elements in a property
697 *
698 * @np: device node from which the property value is to be read.
699 * @propname: name of the property to be searched.
700 *
701 * Search for a property in a device node and count the number of u8 elements
702 * in it. Returns number of elements on sucess, -EINVAL if the property does
703 * not exist or its length does not match a multiple of u8 and -ENODATA if the
704 * property does not have a value.
705 */
706static inline int of_property_count_u8_elems(const struct device_node *np,
707 const char *propname)
708{
709 return of_property_count_elems_of_size(np, propname, sizeof(u8));
710}
711
712/**
713 * of_property_count_u16_elems - Count the number of u16 elements in a property
714 *
715 * @np: device node from which the property value is to be read.
716 * @propname: name of the property to be searched.
717 *
718 * Search for a property in a device node and count the number of u16 elements
719 * in it. Returns number of elements on sucess, -EINVAL if the property does
720 * not exist or its length does not match a multiple of u16 and -ENODATA if the
721 * property does not have a value.
722 */
723static inline int of_property_count_u16_elems(const struct device_node *np,
724 const char *propname)
725{
726 return of_property_count_elems_of_size(np, propname, sizeof(u16));
727}
728
729/**
730 * of_property_count_u32_elems - Count the number of u32 elements in a property
731 *
732 * @np: device node from which the property value is to be read.
733 * @propname: name of the property to be searched.
734 *
735 * Search for a property in a device node and count the number of u32 elements
736 * in it. Returns number of elements on sucess, -EINVAL if the property does
737 * not exist or its length does not match a multiple of u32 and -ENODATA if the
738 * property does not have a value.
739 */
740static inline int of_property_count_u32_elems(const struct device_node *np,
741 const char *propname)
742{
743 return of_property_count_elems_of_size(np, propname, sizeof(u32));
744}
745
746/**
747 * of_property_count_u64_elems - Count the number of u64 elements in a property
748 *
749 * @np: device node from which the property value is to be read.
750 * @propname: name of the property to be searched.
751 *
752 * Search for a property in a device node and count the number of u64 elements
753 * in it. Returns number of elements on sucess, -EINVAL if the property does
754 * not exist or its length does not match a multiple of u64 and -ENODATA if the
755 * property does not have a value.
756 */
757static inline int of_property_count_u64_elems(const struct device_node *np,
758 const char *propname)
759{
760 return of_property_count_elems_of_size(np, propname, sizeof(u64));
761}
762
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800763/**
Grant Likelya87fa1d2014-11-03 15:15:35 +0000764 * of_property_read_string_array() - Read an array of strings from a multiple
765 * strings property.
766 * @np: device node from which the property value is to be read.
767 * @propname: name of the property to be searched.
768 * @out_strs: output array of string pointers.
769 * @sz: number of array elements to read.
770 *
771 * Search for a property in a device tree node and retrieve a list of
772 * terminated string values (pointer to data, not a copy) in that property.
773 *
774 * If @out_strs is NULL, the number of strings in the property is returned.
775 */
776static inline int of_property_read_string_array(struct device_node *np,
777 const char *propname, const char **out_strs,
778 size_t sz)
779{
780 return of_property_read_string_helper(np, propname, out_strs, sz, 0);
781}
782
783/**
784 * of_property_count_strings() - Find and return the number of strings from a
785 * multiple strings property.
786 * @np: device node from which the property value is to be read.
787 * @propname: name of the property to be searched.
788 *
789 * Search for a property in a device tree node and retrieve the number of null
790 * terminated string contain in it. Returns the number of strings on
791 * success, -EINVAL if the property does not exist, -ENODATA if property
792 * does not have a value, and -EILSEQ if the string is not null-terminated
793 * within the length of the property data.
794 */
795static inline int of_property_count_strings(struct device_node *np,
796 const char *propname)
797{
798 return of_property_read_string_helper(np, propname, NULL, 0, 0);
799}
800
801/**
802 * of_property_read_string_index() - Find and read a string from a multiple
803 * strings property.
804 * @np: device node from which the property value is to be read.
805 * @propname: name of the property to be searched.
806 * @index: index of the string in the list of strings
807 * @out_string: pointer to null terminated return string, modified only if
808 * return value is 0.
809 *
810 * Search for a property in a device tree node and retrieve a null
811 * terminated string value (pointer to data, not a copy) in the list of strings
812 * contained in that property.
813 * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
814 * property does not have a value, and -EILSEQ if the string is not
815 * null-terminated within the length of the property data.
816 *
817 * The out_string pointer is modified only if a valid string can be decoded.
818 */
819static inline int of_property_read_string_index(struct device_node *np,
820 const char *propname,
821 int index, const char **output)
822{
823 int rc = of_property_read_string_helper(np, propname, output, 1, index);
824 return rc < 0 ? rc : 0;
825}
826
827/**
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800828 * of_property_read_bool - Findfrom a property
829 * @np: device node from which the property value is to be read.
830 * @propname: name of the property to be searched.
831 *
832 * Search for a property in a device node.
Geert Uytterhoeven31712c92015-05-04 19:42:19 +0200833 * Returns true if the property exists false otherwise.
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800834 */
835static inline bool of_property_read_bool(const struct device_node *np,
836 const char *propname)
837{
838 struct property *prop = of_find_property(np, propname, NULL);
839
840 return prop ? true : false;
841}
842
Viresh Kumarbe193242012-11-20 10:15:19 +0530843static inline int of_property_read_u8(const struct device_node *np,
844 const char *propname,
845 u8 *out_value)
846{
847 return of_property_read_u8_array(np, propname, out_value, 1);
848}
849
850static inline int of_property_read_u16(const struct device_node *np,
851 const char *propname,
852 u16 *out_value)
853{
854 return of_property_read_u16_array(np, propname, out_value, 1);
855}
856
Shawn Guob98c0232011-07-08 16:27:33 +0800857static inline int of_property_read_u32(const struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100858 const char *propname,
Shawn Guob98c0232011-07-08 16:27:33 +0800859 u32 *out_value)
860{
861 return of_property_read_u32_array(np, propname, out_value, 1);
862}
863
Sebastian Reichele7a00e42014-04-06 12:52:11 +0200864static inline int of_property_read_s32(const struct device_node *np,
865 const char *propname,
866 s32 *out_value)
867{
868 return of_property_read_u32(np, propname, (u32*) out_value);
869}
870
Sebastian Andrzej Siewior2adfffa2013-06-17 16:48:13 +0200871#define of_property_for_each_u32(np, propname, prop, p, u) \
872 for (prop = of_find_property(np, propname, NULL), \
873 p = of_prop_next_u32(prop, NULL, &u); \
874 p; \
875 p = of_prop_next_u32(prop, p, &u))
876
877#define of_property_for_each_string(np, propname, prop, s) \
878 for (prop = of_find_property(np, propname, NULL), \
879 s = of_prop_next_string(prop, NULL); \
880 s; \
881 s = of_prop_next_string(prop, s))
882
Rob Herring662372e2014-02-03 08:53:44 -0600883#define for_each_node_by_name(dn, name) \
884 for (dn = of_find_node_by_name(NULL, name); dn; \
885 dn = of_find_node_by_name(dn, name))
886#define for_each_node_by_type(dn, type) \
887 for (dn = of_find_node_by_type(NULL, type); dn; \
888 dn = of_find_node_by_type(dn, type))
889#define for_each_compatible_node(dn, type, compatible) \
890 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
891 dn = of_find_compatible_node(dn, type, compatible))
892#define for_each_matching_node(dn, matches) \
893 for (dn = of_find_matching_node(NULL, matches); dn; \
894 dn = of_find_matching_node(dn, matches))
895#define for_each_matching_node_and_match(dn, matches, match) \
896 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
897 dn; dn = of_find_matching_node_and_match(dn, matches, match))
898
899#define for_each_child_of_node(parent, child) \
900 for (child = of_get_next_child(parent, NULL); child != NULL; \
901 child = of_get_next_child(parent, child))
902#define for_each_available_child_of_node(parent, child) \
903 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
904 child = of_get_next_available_child(parent, child))
905
906#define for_each_node_with_property(dn, prop_name) \
907 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
908 dn = of_find_node_with_property(dn, prop_name))
909
910static inline int of_get_child_count(const struct device_node *np)
911{
912 struct device_node *child;
913 int num = 0;
914
915 for_each_child_of_node(np, child)
916 num++;
917
918 return num;
919}
920
921static inline int of_get_available_child_count(const struct device_node *np)
922{
923 struct device_node *child;
924 int num = 0;
925
926 for_each_available_child_of_node(np, child)
927 num++;
928
929 return num;
930}
931
Masahiro Yamada71f50c62016-01-22 01:33:51 +0900932#if defined(CONFIG_OF) && !defined(MODULE)
Rob Herring54196cc2014-05-08 16:09:24 -0500933#define _OF_DECLARE(table, name, compat, fn, fn_type) \
934 static const struct of_device_id __of_table_##name \
935 __used __section(__##table##_of_table) \
936 = { .compatible = compat, \
937 .data = (fn == (fn_type)NULL) ? fn : fn }
938#else
Thierry Reding5f563582014-10-02 16:01:10 +0200939#define _OF_DECLARE(table, name, compat, fn, fn_type) \
Rob Herring54196cc2014-05-08 16:09:24 -0500940 static const struct of_device_id __of_table_##name \
941 __attribute__((unused)) \
942 = { .compatible = compat, \
943 .data = (fn == (fn_type)NULL) ? fn : fn }
944#endif
945
946typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
947typedef void (*of_init_fn_1)(struct device_node *);
948
949#define OF_DECLARE_1(table, name, compat, fn) \
950 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
951#define OF_DECLARE_2(table, name, compat, fn) \
952 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
953
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300954/**
955 * struct of_changeset_entry - Holds a changeset entry
956 *
957 * @node: list_head for the log list
958 * @action: notifier action
959 * @np: pointer to the device node affected
960 * @prop: pointer to the property affected
961 * @old_prop: hold a pointer to the original property
962 *
963 * Every modification of the device tree during a changeset
964 * is held in a list of of_changeset_entry structures.
965 * That way we can recover from a partial application, or we can
966 * revert the changeset
967 */
968struct of_changeset_entry {
969 struct list_head node;
970 unsigned long action;
971 struct device_node *np;
972 struct property *prop;
973 struct property *old_prop;
974};
975
976/**
977 * struct of_changeset - changeset tracker structure
978 *
979 * @entries: list_head for the changeset entries
980 *
981 * changesets are a convenient way to apply bulk changes to the
982 * live tree. In case of an error, changes are rolled-back.
983 * changesets live on after initial application, and if not
984 * destroyed after use, they can be reverted in one single call.
985 */
986struct of_changeset {
987 struct list_head entries;
988};
989
Pantelis Antonioub53a2342014-10-28 22:33:53 +0200990enum of_reconfig_change {
991 OF_RECONFIG_NO_CHANGE = 0,
992 OF_RECONFIG_CHANGE_ADD,
993 OF_RECONFIG_CHANGE_REMOVE,
994};
995
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300996#ifdef CONFIG_OF_DYNAMIC
Grant Likelyf6892d12014-11-21 15:14:58 +0000997extern int of_reconfig_notifier_register(struct notifier_block *);
998extern int of_reconfig_notifier_unregister(struct notifier_block *);
Grant Likelyf5242e52014-11-24 17:58:01 +0000999extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
1000extern int of_reconfig_get_state_change(unsigned long action,
1001 struct of_reconfig_data *arg);
Grant Likelyf6892d12014-11-21 15:14:58 +00001002
Pantelis Antoniou201c9102014-07-04 19:58:49 +03001003extern void of_changeset_init(struct of_changeset *ocs);
1004extern void of_changeset_destroy(struct of_changeset *ocs);
1005extern int of_changeset_apply(struct of_changeset *ocs);
1006extern int of_changeset_revert(struct of_changeset *ocs);
1007extern int of_changeset_action(struct of_changeset *ocs,
1008 unsigned long action, struct device_node *np,
1009 struct property *prop);
1010
1011static inline int of_changeset_attach_node(struct of_changeset *ocs,
1012 struct device_node *np)
1013{
1014 return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
1015}
1016
1017static inline int of_changeset_detach_node(struct of_changeset *ocs,
1018 struct device_node *np)
1019{
1020 return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
1021}
1022
1023static inline int of_changeset_add_property(struct of_changeset *ocs,
1024 struct device_node *np, struct property *prop)
1025{
1026 return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
1027}
1028
1029static inline int of_changeset_remove_property(struct of_changeset *ocs,
1030 struct device_node *np, struct property *prop)
1031{
1032 return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
1033}
1034
1035static inline int of_changeset_update_property(struct of_changeset *ocs,
1036 struct device_node *np, struct property *prop)
1037{
1038 return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
1039}
Grant Likelyf6892d12014-11-21 15:14:58 +00001040#else /* CONFIG_OF_DYNAMIC */
1041static inline int of_reconfig_notifier_register(struct notifier_block *nb)
1042{
1043 return -EINVAL;
1044}
1045static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
1046{
1047 return -EINVAL;
1048}
Grant Likelyf5242e52014-11-24 17:58:01 +00001049static inline int of_reconfig_notify(unsigned long action,
1050 struct of_reconfig_data *arg)
Grant Likelyf6892d12014-11-21 15:14:58 +00001051{
1052 return -EINVAL;
1053}
Grant Likelyf5242e52014-11-24 17:58:01 +00001054static inline int of_reconfig_get_state_change(unsigned long action,
1055 struct of_reconfig_data *arg)
Grant Likelyf6892d12014-11-21 15:14:58 +00001056{
1057 return -EINVAL;
1058}
1059#endif /* CONFIG_OF_DYNAMIC */
Pantelis Antoniou201c9102014-07-04 19:58:49 +03001060
Pantelis Antoniou7941b272014-07-04 19:59:20 +03001061/* CONFIG_OF_RESOLVE api */
1062extern int of_resolve_phandles(struct device_node *tree);
1063
Romain Periera4b4e042014-10-14 06:31:09 +00001064/**
Romain Perier8f731102014-11-25 12:28:25 +00001065 * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
Romain Periera4b4e042014-10-14 06:31:09 +00001066 * @np: Pointer to the given device_node
1067 *
1068 * return true if present false otherwise
1069 */
Romain Perier8f731102014-11-25 12:28:25 +00001070static inline bool of_device_is_system_power_controller(const struct device_node *np)
Romain Periera4b4e042014-10-14 06:31:09 +00001071{
Romain Perier8f731102014-11-25 12:28:25 +00001072 return of_property_read_bool(np, "system-power-controller");
Romain Periera4b4e042014-10-14 06:31:09 +00001073}
1074
Linus Torvalds7ef58b32014-12-11 13:06:58 -08001075/**
Pantelis Antoniou7518b5892014-10-28 22:35:58 +02001076 * Overlay support
1077 */
1078
1079#ifdef CONFIG_OF_OVERLAY
1080
1081/* ID based overlays; the API for external users */
1082int of_overlay_create(struct device_node *tree);
1083int of_overlay_destroy(int id);
1084int of_overlay_destroy_all(void);
1085
1086#else
1087
1088static inline int of_overlay_create(struct device_node *tree)
1089{
1090 return -ENOTSUPP;
1091}
1092
1093static inline int of_overlay_destroy(int id)
1094{
1095 return -ENOTSUPP;
1096}
1097
1098static inline int of_overlay_destroy_all(void)
1099{
1100 return -ENOTSUPP;
1101}
1102
1103#endif
1104
Stephen Rothwell76c1ce72007-05-01 16:19:07 +10001105#endif /* _LINUX_OF_H */