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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 Herrmannb66548e22014-01-17 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
Hans de Goede6d09dc62014-11-14 13:26:52 +0100123#ifdef CONFIG_OF
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100124static inline bool is_of_node(struct fwnode_handle *fwnode)
125{
126 return fwnode && fwnode->type == FWNODE_OF;
127}
128
129static inline struct device_node *of_node(struct fwnode_handle *fwnode)
130{
131 return fwnode ? container_of(fwnode, struct device_node, fwnode) : NULL;
132}
133
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100134static inline bool of_have_populated_dt(void)
135{
Grant Likely5063e252014-10-03 16:28:27 +0100136 return of_root != NULL;
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100137}
138
Andres Salomon035ebef2010-07-13 09:42:26 +0000139static inline bool of_node_is_root(const struct device_node *node)
140{
141 return node && (node->parent == NULL);
142}
143
Grant Likely50436312009-10-15 10:57:58 -0600144static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
145{
146 return test_bit(flag, &n->_flags);
147}
148
Pawel Mollc6e126d2014-05-15 16:55:24 +0100149static inline int of_node_test_and_set_flag(struct device_node *n,
150 unsigned long flag)
151{
152 return test_and_set_bit(flag, &n->_flags);
153}
154
Grant Likely50436312009-10-15 10:57:58 -0600155static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
156{
157 set_bit(flag, &n->_flags);
158}
159
Pantelis Antoniou588453c2013-11-08 17:03:56 +0200160static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
161{
162 clear_bit(flag, &n->_flags);
163}
164
165static inline int of_property_check_flag(struct property *p, unsigned long flag)
166{
167 return test_bit(flag, &p->_flags);
168}
169
170static inline void of_property_set_flag(struct property *p, unsigned long flag)
171{
172 set_bit(flag, &p->_flags);
173}
174
175static inline void of_property_clear_flag(struct property *p, unsigned long flag)
176{
177 clear_bit(flag, &p->_flags);
178}
179
Grant Likely5063e252014-10-03 16:28:27 +0100180extern struct device_node *__of_find_all_nodes(struct device_node *prev);
Grant Likelye91edcf2009-10-15 10:58:09 -0600181extern struct device_node *of_find_all_nodes(struct device_node *prev);
182
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600183/*
Lennert Buytenhek3d6b8822011-02-22 18:18:51 +0100184 * OF address retrieval & translation
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600185 */
186
187/* Helper to read a big number; size is in cells (not bytes) */
Jeremy Kerr2e89e682010-01-30 01:41:49 -0700188static inline u64 of_read_number(const __be32 *cell, int size)
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600189{
190 u64 r = 0;
191 while (size--)
Jeremy Kerr2e89e682010-01-30 01:41:49 -0700192 r = (r << 32) | be32_to_cpu(*(cell++));
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600193 return r;
194}
195
196/* Like of_read_number, but we want an unsigned long result */
Jeremy Kerr2e89e682010-01-30 01:41:49 -0700197static inline unsigned long of_read_ulong(const __be32 *cell, int size)
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600198{
Grant Likely2be09cb2009-11-23 20:16:46 -0700199 /* toss away upper bits if unsigned long is smaller than u64 */
200 return of_read_number(cell, size);
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600201}
Grant Likelyb6caf2a2009-10-15 10:58:00 -0600202
Rob Herringb5b4bb32013-09-07 14:08:20 -0500203#if defined(CONFIG_SPARC)
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000204#include <asm/prom.h>
Rob Herringb5b4bb32013-09-07 14:08:20 -0500205#endif
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000206
Grant Likely7c7b60c2010-02-14 07:13:50 -0700207/* Default #address and #size cells. Allow arch asm/prom.h to override */
208#if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
209#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
210#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
211#endif
212
213/* Default string compare functions, Allow arch asm/prom.h to override */
214#if !defined(of_compat_cmp)
Grant Likely19761522010-03-18 07:30:31 -0600215#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
Grant Likely7c7b60c2010-02-14 07:13:50 -0700216#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
217#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
218#endif
219
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000220/* flag descriptions */
221#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
222#define OF_DETACHED 2 /* node has been detached from the device tree */
Pawel Mollc6e126d2014-05-15 16:55:24 +0100223#define OF_POPULATED 3 /* device already created for the node */
Grant Likely75f353b2014-06-24 16:13:47 +0100224#define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000225
Grant Likely61e955d2009-10-15 10:57:51 -0600226#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
227#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
228
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000229#define OF_BAD_ADDR ((u64)-1)
230
Steffen Trumtrarc0a05bf2012-12-18 11:32:03 +0100231static inline const char *of_node_full_name(const struct device_node *np)
Grant Likely74a7f082012-06-15 11:50:25 -0600232{
233 return np ? np->full_name : "<no-node>";
234}
235
Grant Likely5063e252014-10-03 16:28:27 +0100236#define for_each_of_allnodes_from(from, dn) \
237 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
238#define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000239extern struct device_node *of_find_node_by_name(struct device_node *from,
240 const char *name);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000241extern struct device_node *of_find_node_by_type(struct device_node *from,
242 const char *type);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000243extern struct device_node *of_find_compatible_node(struct device_node *from,
244 const char *type, const char *compat);
Stephen Warren50c8af42012-11-20 16:12:20 -0700245extern struct device_node *of_find_matching_node_and_match(
246 struct device_node *from,
247 const struct of_device_id *matches,
248 const struct of_device_id **match);
Rob Herring662372e2014-02-03 08:53:44 -0600249
Leif Lindholm75c28c02014-11-28 11:34:28 +0000250extern struct device_node *of_find_node_opts_by_path(const char *path,
251 const char **opts);
252static inline struct device_node *of_find_node_by_path(const char *path)
253{
254 return of_find_node_opts_by_path(path, NULL);
255}
256
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000257extern struct device_node *of_find_node_by_phandle(phandle handle);
258extern struct device_node *of_get_parent(const struct device_node *node);
Michael Ellermanf4eb0102007-10-26 16:54:31 +1000259extern struct device_node *of_get_next_parent(struct device_node *node);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000260extern struct device_node *of_get_next_child(const struct device_node *node,
261 struct device_node *prev);
Timur Tabi32961932012-08-14 13:20:23 +0000262extern struct device_node *of_get_next_available_child(
263 const struct device_node *node, struct device_node *prev);
264
Srinivas Kandagatla9c197612012-09-18 08:10:28 +0100265extern struct device_node *of_get_child_by_name(const struct device_node *node,
266 const char *name);
Bryan Wu954e04b2013-09-24 10:38:26 -0700267
Sudeep KarkadaNageshaa3e31b42013-09-18 11:53:05 +0100268/* cache lookup */
269extern struct device_node *of_find_next_cache_node(const struct device_node *);
Michael Ellerman1e291b12008-11-12 18:54:42 +0000270extern struct device_node *of_find_node_with_property(
271 struct device_node *from, const char *prop_name);
Michael Ellerman1e291b12008-11-12 18:54:42 +0000272
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000273extern struct property *of_find_property(const struct device_node *np,
274 const char *name,
275 int *lenp);
Heiko Stuebnerad54a0c2014-02-12 01:00:34 +0100276extern int of_property_count_elems_of_size(const struct device_node *np,
277 const char *propname, int elem_size);
Tony Prisk3daf3722013-03-23 17:02:15 +1300278extern int of_property_read_u32_index(const struct device_node *np,
279 const char *propname,
280 u32 index, u32 *out_value);
Viresh Kumarbe193242012-11-20 10:15:19 +0530281extern int of_property_read_u8_array(const struct device_node *np,
282 const char *propname, u8 *out_values, size_t sz);
283extern int of_property_read_u16_array(const struct device_node *np,
284 const char *propname, u16 *out_values, size_t sz);
Rob Herring0e373632011-07-06 15:42:58 -0500285extern int of_property_read_u32_array(const struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100286 const char *propname,
Rob Herring0e373632011-07-06 15:42:58 -0500287 u32 *out_values,
288 size_t sz);
Jamie Iles4cd7f7a2011-09-14 20:49:59 +0100289extern int of_property_read_u64(const struct device_node *np,
290 const char *propname, u64 *out_value);
Rafael J. Wysockib31384f2014-11-04 01:28:56 +0100291extern int of_property_read_u64_array(const struct device_node *np,
292 const char *propname,
293 u64 *out_values,
294 size_t sz);
Rob Herring0e373632011-07-06 15:42:58 -0500295
Jamie Ilesaac285c2011-08-02 15:45:07 +0100296extern int of_property_read_string(struct device_node *np,
297 const char *propname,
298 const char **out_string);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700299extern int of_property_match_string(struct device_node *np,
300 const char *propname,
301 const char *string);
Grant Likelya87fa1d2014-11-03 15:15:35 +0000302extern int of_property_read_string_helper(struct device_node *np,
303 const char *propname,
304 const char **out_strs, size_t sz, int index);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000305extern int of_device_is_compatible(const struct device_node *device,
306 const char *);
Kevin Cernekee53a4ab92014-11-12 12:54:01 -0800307extern bool of_device_is_available(const struct device_node *device);
Kevin Cernekee37786c72015-04-09 13:05:14 -0700308extern bool of_device_is_big_endian(const struct device_node *device);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000309extern const void *of_get_property(const struct device_node *node,
310 const char *name,
311 int *lenp);
Sudeep KarkadaNagesha183912d2013-08-15 14:01:40 +0100312extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
Dong Aisheng8af0da92011-12-22 20:19:24 +0800313#define for_each_property_of_node(dn, pp) \
314 for (pp = dn->properties; pp != NULL; pp = pp->next)
Shawn Guo611cad72011-08-15 15:28:14 +0800315
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000316extern int of_n_addr_cells(struct device_node *np);
317extern int of_n_size_cells(struct device_node *np);
Grant Likely283029d2008-01-09 06:20:40 +1100318extern const struct of_device_id *of_match_node(
319 const struct of_device_id *matches, const struct device_node *node);
Grant Likely3f07af42008-07-25 22:25:13 -0400320extern int of_modalias_node(struct device_node *node, char *modalias, int len);
Grant Likely624cfca2013-10-11 22:05:10 +0100321extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
Steffen Trumtrarb8fbdc42012-11-22 12:16:43 +0100322extern struct device_node *of_parse_phandle(const struct device_node *np,
Grant Likely739649c2009-04-25 12:52:40 +0000323 const char *phandle_name,
324 int index);
Guennadi Liakhovetski93c667c2012-12-10 20:41:30 +0100325extern int of_parse_phandle_with_args(const struct device_node *np,
Anton Vorontsov64b60e02008-10-10 04:43:17 +0000326 const char *list_name, const char *cells_name, int index,
Grant Likely15c9a0a2011-12-12 09:25:57 -0700327 struct of_phandle_args *out_args);
Stephen Warren035fd942013-08-14 15:27:10 -0600328extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
329 const char *list_name, int cells_count, int index,
330 struct of_phandle_args *out_args);
Grant Likelybd69f732013-02-10 22:57:21 +0000331extern int of_count_phandle_with_args(const struct device_node *np,
332 const char *list_name, const char *cells_name);
Stephen Rothwell76c1ce72007-05-01 16:19:07 +1000333
Shawn Guo611cad72011-08-15 15:28:14 +0800334extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
335extern int of_alias_get_id(struct device_node *np, const char *stem);
Wolfram Sang351d2242015-03-12 17:17:58 +0100336extern int of_alias_get_highest_id(const char *stem);
Shawn Guo611cad72011-08-15 15:28:14 +0800337
Grant Likely21b082e2010-02-14 07:13:38 -0700338extern int of_machine_is_compatible(const char *compat);
339
Nathan Fontenot79d1c712012-10-02 16:58:46 +0000340extern int of_add_property(struct device_node *np, struct property *prop);
341extern int of_remove_property(struct device_node *np, struct property *prop);
342extern int of_update_property(struct device_node *np, struct property *newprop);
Grant Likely21b082e2010-02-14 07:13:38 -0700343
Grant Likelyfcdeb7f2010-01-29 05:04:33 -0700344/* For updating the device tree at runtime */
Nathan Fontenot1cf3d8b2012-10-02 16:57:57 +0000345#define OF_RECONFIG_ATTACH_NODE 0x0001
346#define OF_RECONFIG_DETACH_NODE 0x0002
347#define OF_RECONFIG_ADD_PROPERTY 0x0003
348#define OF_RECONFIG_REMOVE_PROPERTY 0x0004
349#define OF_RECONFIG_UPDATE_PROPERTY 0x0005
350
Nathan Fontenot1cf3d8b2012-10-02 16:57:57 +0000351extern int of_attach_node(struct device_node *);
352extern int of_detach_node(struct device_node *);
Grant Likelyfcdeb7f2010-01-29 05:04:33 -0700353
Ben Dooks3a1e3622011-08-03 10:11:42 +0100354#define of_match_ptr(_ptr) (_ptr)
Stephen Warrenc541adc2012-04-04 09:27:46 -0600355
356/*
357 * struct property *prop;
358 * const __be32 *p;
359 * u32 u;
360 *
361 * of_property_for_each_u32(np, "propname", prop, p, u)
362 * printk("U32 value: %x\n", u);
363 */
364const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
365 u32 *pu);
Stephen Warrenc541adc2012-04-04 09:27:46 -0600366/*
367 * struct property *prop;
368 * const char *s;
369 *
370 * of_property_for_each_string(np, "propname", prop, s)
371 * printk("String value: %s\n", s);
372 */
373const char *of_prop_next_string(struct property *prop, const char *cur);
Stephen Warrenc541adc2012-04-04 09:27:46 -0600374
Grant Likely3482f2c2014-03-27 17:18:55 -0700375bool of_console_check(struct device_node *dn, char *name, int index);
Sascha Hauer5c19e952013-08-05 14:40:44 +0200376
Shawn Guob98c0232011-07-08 16:27:33 +0800377#else /* CONFIG_OF */
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100378
Rafael J. Wysocki8a0662d2014-11-04 14:03:59 +0100379static inline bool is_of_node(struct fwnode_handle *fwnode)
380{
381 return false;
382}
383
384static inline struct device_node *of_node(struct fwnode_handle *fwnode)
385{
386 return NULL;
387}
388
Stephen Rothwell4c358e12014-05-15 14:44:30 +1000389static inline const char* of_node_full_name(const struct device_node *np)
Grant Likely74a7f082012-06-15 11:50:25 -0600390{
391 return "<no-node>";
392}
393
Peter Ujfalusi1cc44f42012-09-10 13:46:24 +0300394static inline struct device_node *of_find_node_by_name(struct device_node *from,
395 const char *name)
396{
397 return NULL;
398}
399
Rob Herring662372e2014-02-03 08:53:44 -0600400static inline struct device_node *of_find_node_by_type(struct device_node *from,
401 const char *type)
402{
403 return NULL;
404}
405
406static inline struct device_node *of_find_matching_node_and_match(
407 struct device_node *from,
408 const struct of_device_id *matches,
409 const struct of_device_id **match)
410{
411 return NULL;
412}
413
Alexander Shiyan20cd4772014-04-16 10:49:20 +0400414static inline struct device_node *of_find_node_by_path(const char *path)
415{
416 return NULL;
417}
418
Leif Lindholm75c28c02014-11-28 11:34:28 +0000419static inline struct device_node *of_find_node_opts_by_path(const char *path,
420 const char **opts)
421{
422 return NULL;
423}
424
Alexander Shiyan066ec1d2013-04-09 19:47:40 +0400425static inline struct device_node *of_get_parent(const struct device_node *node)
426{
427 return NULL;
428}
429
Rob Herring662372e2014-02-03 08:53:44 -0600430static inline struct device_node *of_get_next_child(
431 const struct device_node *node, struct device_node *prev)
432{
433 return NULL;
434}
435
436static inline struct device_node *of_get_next_available_child(
437 const struct device_node *node, struct device_node *prev)
438{
439 return NULL;
440}
441
442static inline struct device_node *of_find_node_with_property(
443 struct device_node *from, const char *prop_name)
444{
445 return NULL;
446}
447
Sebastian Andrzej Siewior3bcbaf62011-02-22 21:07:46 +0100448static inline bool of_have_populated_dt(void)
449{
450 return false;
451}
452
Olof Johansson25c040c2012-10-07 10:40:54 -0700453static inline struct device_node *of_get_child_by_name(
454 const struct device_node *node,
455 const char *name)
456{
457 return NULL;
458}
459
Rajendra Nayak36a09042011-10-10 21:49:35 +0530460static inline int of_device_is_compatible(const struct device_node *device,
461 const char *name)
462{
463 return 0;
464}
465
Kevin Cernekee53a4ab92014-11-12 12:54:01 -0800466static inline bool of_device_is_available(const struct device_node *device)
Rob Herringd7195692013-03-20 16:56:18 -0500467{
Kevin Cernekee53a4ab92014-11-12 12:54:01 -0800468 return false;
Rob Herringd7195692013-03-20 16:56:18 -0500469}
470
Kevin Cernekee37786c72015-04-09 13:05:14 -0700471static inline bool of_device_is_big_endian(const struct device_node *device)
472{
473 return false;
474}
475
Stephen Warrenaba3dff2011-09-21 13:23:10 -0600476static inline struct property *of_find_property(const struct device_node *np,
477 const char *name,
478 int *lenp)
479{
480 return NULL;
481}
482
Shawn Guo2261cc62012-02-15 10:47:42 -0800483static inline struct device_node *of_find_compatible_node(
484 struct device_node *from,
485 const char *type,
486 const char *compat)
487{
488 return NULL;
489}
490
Heiko Stuebnerad54a0c2014-02-12 01:00:34 +0100491static inline int of_property_count_elems_of_size(const struct device_node *np,
492 const char *propname, int elem_size)
493{
494 return -ENOSYS;
495}
496
Tony Prisk3daf3722013-03-23 17:02:15 +1300497static inline int of_property_read_u32_index(const struct device_node *np,
498 const char *propname, u32 index, u32 *out_value)
499{
500 return -ENOSYS;
501}
502
Viresh Kumarbe193242012-11-20 10:15:19 +0530503static inline int of_property_read_u8_array(const struct device_node *np,
504 const char *propname, u8 *out_values, size_t sz)
505{
506 return -ENOSYS;
507}
508
509static inline int of_property_read_u16_array(const struct device_node *np,
510 const char *propname, u16 *out_values, size_t sz)
511{
512 return -ENOSYS;
513}
514
Shawn Guob98c0232011-07-08 16:27:33 +0800515static inline int of_property_read_u32_array(const struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100516 const char *propname,
517 u32 *out_values, size_t sz)
Shawn Guob98c0232011-07-08 16:27:33 +0800518{
519 return -ENOSYS;
520}
521
Rafael J. Wysockib31384f2014-11-04 01:28:56 +0100522static inline int of_property_read_u64_array(const struct device_node *np,
523 const char *propname,
524 u64 *out_values, size_t sz)
525{
526 return -ENOSYS;
527}
528
Shawn Guob98c0232011-07-08 16:27:33 +0800529static inline int of_property_read_string(struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100530 const char *propname,
531 const char **out_string)
Shawn Guob98c0232011-07-08 16:27:33 +0800532{
533 return -ENOSYS;
534}
535
Grant Likelya87fa1d2014-11-03 15:15:35 +0000536static inline int of_property_read_string_helper(struct device_node *np,
537 const char *propname,
538 const char **out_strs, size_t sz, int index)
Benoit Cousson4fcd15a2011-09-27 17:45:43 +0200539{
540 return -ENOSYS;
541}
542
Stephen Warren89272b82011-08-05 16:50:30 -0600543static inline const void *of_get_property(const struct device_node *node,
544 const char *name,
545 int *lenp)
546{
547 return NULL;
548}
549
Sudeep KarkadaNagesha183912d2013-08-15 14:01:40 +0100550static inline struct device_node *of_get_cpu_node(int cpu,
551 unsigned int *thread)
552{
553 return NULL;
554}
555
Jamie Iles4cd7f7a2011-09-14 20:49:59 +0100556static inline int of_property_read_u64(const struct device_node *np,
557 const char *propname, u64 *out_value)
558{
559 return -ENOSYS;
560}
561
Thierry Redingbd3d5502012-04-13 16:18:34 +0200562static inline int of_property_match_string(struct device_node *np,
563 const char *propname,
564 const char *string)
565{
566 return -ENOSYS;
567}
568
Steffen Trumtrarb8fbdc42012-11-22 12:16:43 +0100569static inline struct device_node *of_parse_phandle(const struct device_node *np,
Rajendra Nayak36a09042011-10-10 21:49:35 +0530570 const char *phandle_name,
571 int index)
572{
573 return NULL;
574}
575
Thierry Redinge05e5072012-04-13 16:19:21 +0200576static inline int of_parse_phandle_with_args(struct device_node *np,
577 const char *list_name,
578 const char *cells_name,
579 int index,
580 struct of_phandle_args *out_args)
581{
582 return -ENOSYS;
583}
584
Stephen Warren035fd942013-08-14 15:27:10 -0600585static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
586 const char *list_name, int cells_count, int index,
587 struct of_phandle_args *out_args)
588{
589 return -ENOSYS;
590}
591
Grant Likelybd69f732013-02-10 22:57:21 +0000592static inline int of_count_phandle_with_args(struct device_node *np,
593 const char *list_name,
594 const char *cells_name)
595{
596 return -ENOSYS;
597}
598
Nicolas Ferreed5f8862011-10-27 11:07:28 +0200599static inline int of_alias_get_id(struct device_node *np, const char *stem)
600{
601 return -ENOSYS;
602}
603
Wolfram Sang351d2242015-03-12 17:17:58 +0100604static inline int of_alias_get_highest_id(const char *stem)
605{
606 return -ENOSYS;
607}
608
Stephen Warren50e07f82011-10-25 14:01:26 +0200609static inline int of_machine_is_compatible(const char *compat)
610{
611 return 0;
612}
613
Grant Likely3482f2c2014-03-27 17:18:55 -0700614static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
Sascha Hauer5c19e952013-08-05 14:40:44 +0200615{
Grant Likely3482f2c2014-03-27 17:18:55 -0700616 return false;
Sascha Hauer5c19e952013-08-05 14:40:44 +0200617}
618
Sebastian Andrzej Siewior2adfffa2013-06-17 16:48:13 +0200619static inline const __be32 *of_prop_next_u32(struct property *prop,
620 const __be32 *cur, u32 *pu)
621{
622 return NULL;
623}
624
625static inline const char *of_prop_next_string(struct property *prop,
626 const char *cur)
627{
628 return NULL;
629}
630
Pantelis Antoniou0384e8c2015-01-21 19:05:57 +0200631static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
632{
633 return 0;
634}
635
636static inline int of_node_test_and_set_flag(struct device_node *n,
637 unsigned long flag)
638{
639 return 0;
640}
641
642static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
643{
644}
645
646static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
647{
648}
649
650static inline int of_property_check_flag(struct property *p, unsigned long flag)
651{
652 return 0;
653}
654
655static inline void of_property_set_flag(struct property *p, unsigned long flag)
656{
657}
658
659static inline void of_property_clear_flag(struct property *p, unsigned long flag)
660{
661}
662
Ben Dooks3a1e3622011-08-03 10:11:42 +0100663#define of_match_ptr(_ptr) NULL
Nicolas Ferre5762c202011-10-24 11:53:32 +0200664#define of_match_node(_matches, _node) NULL
Jeremy Kerr9dfbf202010-02-14 07:13:43 -0700665#endif /* CONFIG_OF */
Shawn Guob98c0232011-07-08 16:27:33 +0800666
Rob Herring0c3f0612013-09-17 10:42:50 -0500667#if defined(CONFIG_OF) && defined(CONFIG_NUMA)
668extern int of_node_to_nid(struct device_node *np);
669#else
670static inline int of_node_to_nid(struct device_node *device) { return 0; }
Paul Mundt5ca4db62012-06-03 22:04:34 -0700671#endif
672
Rob Herring662372e2014-02-03 08:53:44 -0600673static inline struct device_node *of_find_matching_node(
674 struct device_node *from,
675 const struct of_device_id *matches)
676{
677 return of_find_matching_node_and_match(from, matches, NULL);
678}
679
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800680/**
Heiko Stuebnerad54a0c2014-02-12 01:00:34 +0100681 * of_property_count_u8_elems - Count the number of u8 elements in a property
682 *
683 * @np: device node from which the property value is to be read.
684 * @propname: name of the property to be searched.
685 *
686 * Search for a property in a device node and count the number of u8 elements
687 * in it. Returns number of elements on sucess, -EINVAL if the property does
688 * not exist or its length does not match a multiple of u8 and -ENODATA if the
689 * property does not have a value.
690 */
691static inline int of_property_count_u8_elems(const struct device_node *np,
692 const char *propname)
693{
694 return of_property_count_elems_of_size(np, propname, sizeof(u8));
695}
696
697/**
698 * of_property_count_u16_elems - Count the number of u16 elements in a property
699 *
700 * @np: device node from which the property value is to be read.
701 * @propname: name of the property to be searched.
702 *
703 * Search for a property in a device node and count the number of u16 elements
704 * in it. Returns number of elements on sucess, -EINVAL if the property does
705 * not exist or its length does not match a multiple of u16 and -ENODATA if the
706 * property does not have a value.
707 */
708static inline int of_property_count_u16_elems(const struct device_node *np,
709 const char *propname)
710{
711 return of_property_count_elems_of_size(np, propname, sizeof(u16));
712}
713
714/**
715 * of_property_count_u32_elems - Count the number of u32 elements in a property
716 *
717 * @np: device node from which the property value is to be read.
718 * @propname: name of the property to be searched.
719 *
720 * Search for a property in a device node and count the number of u32 elements
721 * in it. Returns number of elements on sucess, -EINVAL if the property does
722 * not exist or its length does not match a multiple of u32 and -ENODATA if the
723 * property does not have a value.
724 */
725static inline int of_property_count_u32_elems(const struct device_node *np,
726 const char *propname)
727{
728 return of_property_count_elems_of_size(np, propname, sizeof(u32));
729}
730
731/**
732 * of_property_count_u64_elems - Count the number of u64 elements in a property
733 *
734 * @np: device node from which the property value is to be read.
735 * @propname: name of the property to be searched.
736 *
737 * Search for a property in a device node and count the number of u64 elements
738 * in it. Returns number of elements on sucess, -EINVAL if the property does
739 * not exist or its length does not match a multiple of u64 and -ENODATA if the
740 * property does not have a value.
741 */
742static inline int of_property_count_u64_elems(const struct device_node *np,
743 const char *propname)
744{
745 return of_property_count_elems_of_size(np, propname, sizeof(u64));
746}
747
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800748/**
Grant Likelya87fa1d2014-11-03 15:15:35 +0000749 * of_property_read_string_array() - Read an array of strings from a multiple
750 * strings property.
751 * @np: device node from which the property value is to be read.
752 * @propname: name of the property to be searched.
753 * @out_strs: output array of string pointers.
754 * @sz: number of array elements to read.
755 *
756 * Search for a property in a device tree node and retrieve a list of
757 * terminated string values (pointer to data, not a copy) in that property.
758 *
759 * If @out_strs is NULL, the number of strings in the property is returned.
760 */
761static inline int of_property_read_string_array(struct device_node *np,
762 const char *propname, const char **out_strs,
763 size_t sz)
764{
765 return of_property_read_string_helper(np, propname, out_strs, sz, 0);
766}
767
768/**
769 * of_property_count_strings() - Find and return the number of strings from a
770 * multiple strings property.
771 * @np: device node from which the property value is to be read.
772 * @propname: name of the property to be searched.
773 *
774 * Search for a property in a device tree node and retrieve the number of null
775 * terminated string contain in it. Returns the number of strings on
776 * success, -EINVAL if the property does not exist, -ENODATA if property
777 * does not have a value, and -EILSEQ if the string is not null-terminated
778 * within the length of the property data.
779 */
780static inline int of_property_count_strings(struct device_node *np,
781 const char *propname)
782{
783 return of_property_read_string_helper(np, propname, NULL, 0, 0);
784}
785
786/**
787 * of_property_read_string_index() - Find and read a string from a multiple
788 * strings property.
789 * @np: device node from which the property value is to be read.
790 * @propname: name of the property to be searched.
791 * @index: index of the string in the list of strings
792 * @out_string: pointer to null terminated return string, modified only if
793 * return value is 0.
794 *
795 * Search for a property in a device tree node and retrieve a null
796 * terminated string value (pointer to data, not a copy) in the list of strings
797 * contained in that property.
798 * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
799 * property does not have a value, and -EILSEQ if the string is not
800 * null-terminated within the length of the property data.
801 *
802 * The out_string pointer is modified only if a valid string can be decoded.
803 */
804static inline int of_property_read_string_index(struct device_node *np,
805 const char *propname,
806 int index, const char **output)
807{
808 int rc = of_property_read_string_helper(np, propname, output, 1, index);
809 return rc < 0 ? rc : 0;
810}
811
812/**
Jean-Christophe PLAGNIOL-VILLARDfa4d34c2012-02-07 12:12:51 +0800813 * of_property_read_bool - Findfrom a property
814 * @np: device node from which the property value is to be read.
815 * @propname: name of the property to be searched.
816 *
817 * Search for a property in a device node.
818 * Returns true if the property exist false otherwise.
819 */
820static inline bool of_property_read_bool(const struct device_node *np,
821 const char *propname)
822{
823 struct property *prop = of_find_property(np, propname, NULL);
824
825 return prop ? true : false;
826}
827
Viresh Kumarbe193242012-11-20 10:15:19 +0530828static inline int of_property_read_u8(const struct device_node *np,
829 const char *propname,
830 u8 *out_value)
831{
832 return of_property_read_u8_array(np, propname, out_value, 1);
833}
834
835static inline int of_property_read_u16(const struct device_node *np,
836 const char *propname,
837 u16 *out_value)
838{
839 return of_property_read_u16_array(np, propname, out_value, 1);
840}
841
Shawn Guob98c0232011-07-08 16:27:33 +0800842static inline int of_property_read_u32(const struct device_node *np,
Jamie Ilesaac285c2011-08-02 15:45:07 +0100843 const char *propname,
Shawn Guob98c0232011-07-08 16:27:33 +0800844 u32 *out_value)
845{
846 return of_property_read_u32_array(np, propname, out_value, 1);
847}
848
Sebastian Reichele7a00e42014-04-06 12:52:11 +0200849static inline int of_property_read_s32(const struct device_node *np,
850 const char *propname,
851 s32 *out_value)
852{
853 return of_property_read_u32(np, propname, (u32*) out_value);
854}
855
Sebastian Andrzej Siewior2adfffa2013-06-17 16:48:13 +0200856#define of_property_for_each_u32(np, propname, prop, p, u) \
857 for (prop = of_find_property(np, propname, NULL), \
858 p = of_prop_next_u32(prop, NULL, &u); \
859 p; \
860 p = of_prop_next_u32(prop, p, &u))
861
862#define of_property_for_each_string(np, propname, prop, s) \
863 for (prop = of_find_property(np, propname, NULL), \
864 s = of_prop_next_string(prop, NULL); \
865 s; \
866 s = of_prop_next_string(prop, s))
867
Rob Herring662372e2014-02-03 08:53:44 -0600868#define for_each_node_by_name(dn, name) \
869 for (dn = of_find_node_by_name(NULL, name); dn; \
870 dn = of_find_node_by_name(dn, name))
871#define for_each_node_by_type(dn, type) \
872 for (dn = of_find_node_by_type(NULL, type); dn; \
873 dn = of_find_node_by_type(dn, type))
874#define for_each_compatible_node(dn, type, compatible) \
875 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
876 dn = of_find_compatible_node(dn, type, compatible))
877#define for_each_matching_node(dn, matches) \
878 for (dn = of_find_matching_node(NULL, matches); dn; \
879 dn = of_find_matching_node(dn, matches))
880#define for_each_matching_node_and_match(dn, matches, match) \
881 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
882 dn; dn = of_find_matching_node_and_match(dn, matches, match))
883
884#define for_each_child_of_node(parent, child) \
885 for (child = of_get_next_child(parent, NULL); child != NULL; \
886 child = of_get_next_child(parent, child))
887#define for_each_available_child_of_node(parent, child) \
888 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
889 child = of_get_next_available_child(parent, child))
890
891#define for_each_node_with_property(dn, prop_name) \
892 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
893 dn = of_find_node_with_property(dn, prop_name))
894
895static inline int of_get_child_count(const struct device_node *np)
896{
897 struct device_node *child;
898 int num = 0;
899
900 for_each_child_of_node(np, child)
901 num++;
902
903 return num;
904}
905
906static inline int of_get_available_child_count(const struct device_node *np)
907{
908 struct device_node *child;
909 int num = 0;
910
911 for_each_available_child_of_node(np, child)
912 num++;
913
914 return num;
915}
916
Rob Herring54196cc2014-05-08 16:09:24 -0500917#ifdef CONFIG_OF
918#define _OF_DECLARE(table, name, compat, fn, fn_type) \
919 static const struct of_device_id __of_table_##name \
920 __used __section(__##table##_of_table) \
921 = { .compatible = compat, \
922 .data = (fn == (fn_type)NULL) ? fn : fn }
923#else
Thierry Reding5f563582014-10-02 16:01:10 +0200924#define _OF_DECLARE(table, name, compat, fn, fn_type) \
Rob Herring54196cc2014-05-08 16:09:24 -0500925 static const struct of_device_id __of_table_##name \
926 __attribute__((unused)) \
927 = { .compatible = compat, \
928 .data = (fn == (fn_type)NULL) ? fn : fn }
929#endif
930
931typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
932typedef void (*of_init_fn_1)(struct device_node *);
933
934#define OF_DECLARE_1(table, name, compat, fn) \
935 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
936#define OF_DECLARE_2(table, name, compat, fn) \
937 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
938
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300939/**
940 * struct of_changeset_entry - Holds a changeset entry
941 *
942 * @node: list_head for the log list
943 * @action: notifier action
944 * @np: pointer to the device node affected
945 * @prop: pointer to the property affected
946 * @old_prop: hold a pointer to the original property
947 *
948 * Every modification of the device tree during a changeset
949 * is held in a list of of_changeset_entry structures.
950 * That way we can recover from a partial application, or we can
951 * revert the changeset
952 */
953struct of_changeset_entry {
954 struct list_head node;
955 unsigned long action;
956 struct device_node *np;
957 struct property *prop;
958 struct property *old_prop;
959};
960
961/**
962 * struct of_changeset - changeset tracker structure
963 *
964 * @entries: list_head for the changeset entries
965 *
966 * changesets are a convenient way to apply bulk changes to the
967 * live tree. In case of an error, changes are rolled-back.
968 * changesets live on after initial application, and if not
969 * destroyed after use, they can be reverted in one single call.
970 */
971struct of_changeset {
972 struct list_head entries;
973};
974
Pantelis Antonioub53a2342014-10-28 22:33:53 +0200975enum of_reconfig_change {
976 OF_RECONFIG_NO_CHANGE = 0,
977 OF_RECONFIG_CHANGE_ADD,
978 OF_RECONFIG_CHANGE_REMOVE,
979};
980
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300981#ifdef CONFIG_OF_DYNAMIC
Grant Likelyf6892d12014-11-21 15:14:58 +0000982extern int of_reconfig_notifier_register(struct notifier_block *);
983extern int of_reconfig_notifier_unregister(struct notifier_block *);
Grant Likelyf5242e52014-11-24 17:58:01 +0000984extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
985extern int of_reconfig_get_state_change(unsigned long action,
986 struct of_reconfig_data *arg);
Grant Likelyf6892d12014-11-21 15:14:58 +0000987
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300988extern void of_changeset_init(struct of_changeset *ocs);
989extern void of_changeset_destroy(struct of_changeset *ocs);
990extern int of_changeset_apply(struct of_changeset *ocs);
991extern int of_changeset_revert(struct of_changeset *ocs);
992extern int of_changeset_action(struct of_changeset *ocs,
993 unsigned long action, struct device_node *np,
994 struct property *prop);
995
996static inline int of_changeset_attach_node(struct of_changeset *ocs,
997 struct device_node *np)
998{
999 return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
1000}
1001
1002static inline int of_changeset_detach_node(struct of_changeset *ocs,
1003 struct device_node *np)
1004{
1005 return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
1006}
1007
1008static inline int of_changeset_add_property(struct of_changeset *ocs,
1009 struct device_node *np, struct property *prop)
1010{
1011 return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
1012}
1013
1014static inline int of_changeset_remove_property(struct of_changeset *ocs,
1015 struct device_node *np, struct property *prop)
1016{
1017 return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
1018}
1019
1020static inline int of_changeset_update_property(struct of_changeset *ocs,
1021 struct device_node *np, struct property *prop)
1022{
1023 return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
1024}
Grant Likelyf6892d12014-11-21 15:14:58 +00001025#else /* CONFIG_OF_DYNAMIC */
1026static inline int of_reconfig_notifier_register(struct notifier_block *nb)
1027{
1028 return -EINVAL;
1029}
1030static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
1031{
1032 return -EINVAL;
1033}
Grant Likelyf5242e52014-11-24 17:58:01 +00001034static inline int of_reconfig_notify(unsigned long action,
1035 struct of_reconfig_data *arg)
Grant Likelyf6892d12014-11-21 15:14:58 +00001036{
1037 return -EINVAL;
1038}
Grant Likelyf5242e52014-11-24 17:58:01 +00001039static inline int of_reconfig_get_state_change(unsigned long action,
1040 struct of_reconfig_data *arg)
Grant Likelyf6892d12014-11-21 15:14:58 +00001041{
1042 return -EINVAL;
1043}
1044#endif /* CONFIG_OF_DYNAMIC */
Pantelis Antoniou201c9102014-07-04 19:58:49 +03001045
Pantelis Antoniou7941b272014-07-04 19:59:20 +03001046/* CONFIG_OF_RESOLVE api */
1047extern int of_resolve_phandles(struct device_node *tree);
1048
Romain Periera4b4e042014-10-14 06:31:09 +00001049/**
Romain Perier8f731102014-11-25 12:28:25 +00001050 * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
Romain Periera4b4e042014-10-14 06:31:09 +00001051 * @np: Pointer to the given device_node
1052 *
1053 * return true if present false otherwise
1054 */
Romain Perier8f731102014-11-25 12:28:25 +00001055static inline bool of_device_is_system_power_controller(const struct device_node *np)
Romain Periera4b4e042014-10-14 06:31:09 +00001056{
Romain Perier8f731102014-11-25 12:28:25 +00001057 return of_property_read_bool(np, "system-power-controller");
Romain Periera4b4e042014-10-14 06:31:09 +00001058}
1059
Linus Torvalds7ef58b32014-12-11 13:06:58 -08001060/**
Pantelis Antoniou7518b5892014-10-28 22:35:58 +02001061 * Overlay support
1062 */
1063
1064#ifdef CONFIG_OF_OVERLAY
1065
1066/* ID based overlays; the API for external users */
1067int of_overlay_create(struct device_node *tree);
1068int of_overlay_destroy(int id);
1069int of_overlay_destroy_all(void);
1070
1071#else
1072
1073static inline int of_overlay_create(struct device_node *tree)
1074{
1075 return -ENOTSUPP;
1076}
1077
1078static inline int of_overlay_destroy(int id)
1079{
1080 return -ENOTSUPP;
1081}
1082
1083static inline int of_overlay_destroy_all(void)
1084{
1085 return -ENOTSUPP;
1086}
1087
1088#endif
1089
Stephen Rothwell76c1ce72007-05-01 16:19:07 +10001090#endif /* _LINUX_OF_H */