root/include/linux/property.h

INCLUDED FROM

DEFINITIONS

1. device_property_read_bool
2. device_property_read_u8
3. device_property_read_u16
4. device_property_read_u32
5. device_property_read_u64
6. device_property_count_u8
7. device_property_count_u16
8. device_property_count_u32
9. device_property_count_u64
10. fwnode_property_read_bool
11. fwnode_property_read_u8
12. fwnode_property_read_u16
13. fwnode_property_read_u32
14. fwnode_property_read_u64
15. fwnode_property_count_u8
16. fwnode_property_count_u16
17. fwnode_property_count_u32
18. fwnode_property_count_u64

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * property.h - Unified device property interface.
   4  *
   5  * Copyright (C) 2014, Intel Corporation
   6  * Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
   7  *          Mika Westerberg <mika.westerberg@linux.intel.com>
   8  */
   9 
  10 #ifndef _LINUX_PROPERTY_H_
  11 #define _LINUX_PROPERTY_H_
  12 
  13 #include <linux/bits.h>
  14 #include <linux/fwnode.h>
  15 #include <linux/types.h>
  16 
  17 struct device;
  18 
  19 enum dev_prop_type {
  20         DEV_PROP_U8,
  21         DEV_PROP_U16,
  22         DEV_PROP_U32,
  23         DEV_PROP_U64,
  24         DEV_PROP_STRING,
  25         DEV_PROP_MAX,
  26 };
  27 
  28 enum dev_dma_attr {
  29         DEV_DMA_NOT_SUPPORTED,
  30         DEV_DMA_NON_COHERENT,
  31         DEV_DMA_COHERENT,
  32 };
  33 
  34 struct fwnode_handle *dev_fwnode(struct device *dev);
  35 
  36 bool device_property_present(struct device *dev, const char *propname);
  37 int device_property_read_u8_array(struct device *dev, const char *propname,
  38                                   u8 *val, size_t nval);
  39 int device_property_read_u16_array(struct device *dev, const char *propname,
  40                                    u16 *val, size_t nval);
  41 int device_property_read_u32_array(struct device *dev, const char *propname,
  42                                    u32 *val, size_t nval);
  43 int device_property_read_u64_array(struct device *dev, const char *propname,
  44                                    u64 *val, size_t nval);
  45 int device_property_read_string_array(struct device *dev, const char *propname,
  46                                       const char **val, size_t nval);
  47 int device_property_read_string(struct device *dev, const char *propname,
  48                                 const char **val);
  49 int device_property_match_string(struct device *dev,
  50                                  const char *propname, const char *string);
  51 
  52 bool fwnode_device_is_available(const struct fwnode_handle *fwnode);
  53 bool fwnode_property_present(const struct fwnode_handle *fwnode,
  54                              const char *propname);
  55 int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode,
  56                                   const char *propname, u8 *val,
  57                                   size_t nval);
  58 int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode,
  59                                    const char *propname, u16 *val,
  60                                    size_t nval);
  61 int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode,
  62                                    const char *propname, u32 *val,
  63                                    size_t nval);
  64 int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode,
  65                                    const char *propname, u64 *val,
  66                                    size_t nval);
  67 int fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
  68                                       const char *propname, const char **val,
  69                                       size_t nval);
  70 int fwnode_property_read_string(const struct fwnode_handle *fwnode,
  71                                 const char *propname, const char **val);
  72 int fwnode_property_match_string(const struct fwnode_handle *fwnode,
  73                                  const char *propname, const char *string);
  74 int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
  75                                        const char *prop, const char *nargs_prop,
  76                                        unsigned int nargs, unsigned int index,
  77                                        struct fwnode_reference_args *args);
  78 
  79 struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
  80                                             const char *name,
  81                                             unsigned int index);
  82 
  83 struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
  84 struct fwnode_handle *fwnode_get_next_parent(
  85         struct fwnode_handle *fwnode);
  86 struct fwnode_handle *fwnode_get_next_child_node(
  87         const struct fwnode_handle *fwnode, struct fwnode_handle *child);
  88 struct fwnode_handle *fwnode_get_next_available_child_node(
  89         const struct fwnode_handle *fwnode, struct fwnode_handle *child);
  90 
  91 #define fwnode_for_each_child_node(fwnode, child)                       \
  92         for (child = fwnode_get_next_child_node(fwnode, NULL); child;   \
  93              child = fwnode_get_next_child_node(fwnode, child))
  94 
  95 #define fwnode_for_each_available_child_node(fwnode, child)                    \
  96         for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
  97              child = fwnode_get_next_available_child_node(fwnode, child))
  98 
  99 struct fwnode_handle *device_get_next_child_node(
 100         struct device *dev, struct fwnode_handle *child);
 101 
 102 #define device_for_each_child_node(dev, child)                          \
 103         for (child = device_get_next_child_node(dev, NULL); child;      \
 104              child = device_get_next_child_node(dev, child))
 105 
 106 struct fwnode_handle *fwnode_get_named_child_node(
 107         const struct fwnode_handle *fwnode, const char *childname);
 108 struct fwnode_handle *device_get_named_child_node(struct device *dev,
 109                                                   const char *childname);
 110 
 111 struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode);
 112 void fwnode_handle_put(struct fwnode_handle *fwnode);
 113 
 114 int fwnode_irq_get(struct fwnode_handle *fwnode, unsigned int index);
 115 
 116 unsigned int device_get_child_node_count(struct device *dev);
 117 
 118 static inline bool device_property_read_bool(struct device *dev,
 119                                              const char *propname)
 120 {
 121         return device_property_present(dev, propname);
 122 }
 123 
 124 static inline int device_property_read_u8(struct device *dev,
 125                                           const char *propname, u8 *val)
 126 {
 127         return device_property_read_u8_array(dev, propname, val, 1);
 128 }
 129 
 130 static inline int device_property_read_u16(struct device *dev,
 131                                            const char *propname, u16 *val)
 132 {
 133         return device_property_read_u16_array(dev, propname, val, 1);
 134 }
 135 
 136 static inline int device_property_read_u32(struct device *dev,
 137                                            const char *propname, u32 *val)
 138 {
 139         return device_property_read_u32_array(dev, propname, val, 1);
 140 }
 141 
 142 static inline int device_property_read_u64(struct device *dev,
 143                                            const char *propname, u64 *val)
 144 {
 145         return device_property_read_u64_array(dev, propname, val, 1);
 146 }
 147 
 148 static inline int device_property_count_u8(struct device *dev, const char *propname)
 149 {
 150         return device_property_read_u8_array(dev, propname, NULL, 0);
 151 }
 152 
 153 static inline int device_property_count_u16(struct device *dev, const char *propname)
 154 {
 155         return device_property_read_u16_array(dev, propname, NULL, 0);
 156 }
 157 
 158 static inline int device_property_count_u32(struct device *dev, const char *propname)
 159 {
 160         return device_property_read_u32_array(dev, propname, NULL, 0);
 161 }
 162 
 163 static inline int device_property_count_u64(struct device *dev, const char *propname)
 164 {
 165         return device_property_read_u64_array(dev, propname, NULL, 0);
 166 }
 167 
 168 static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode,
 169                                              const char *propname)
 170 {
 171         return fwnode_property_present(fwnode, propname);
 172 }
 173 
 174 static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode,
 175                                           const char *propname, u8 *val)
 176 {
 177         return fwnode_property_read_u8_array(fwnode, propname, val, 1);
 178 }
 179 
 180 static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode,
 181                                            const char *propname, u16 *val)
 182 {
 183         return fwnode_property_read_u16_array(fwnode, propname, val, 1);
 184 }
 185 
 186 static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode,
 187                                            const char *propname, u32 *val)
 188 {
 189         return fwnode_property_read_u32_array(fwnode, propname, val, 1);
 190 }
 191 
 192 static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode,
 193                                            const char *propname, u64 *val)
 194 {
 195         return fwnode_property_read_u64_array(fwnode, propname, val, 1);
 196 }
 197 
 198 static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode,
 199                                            const char *propname)
 200 {
 201         return fwnode_property_read_u8_array(fwnode, propname, NULL, 0);
 202 }
 203 
 204 static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode,
 205                                             const char *propname)
 206 {
 207         return fwnode_property_read_u16_array(fwnode, propname, NULL, 0);
 208 }
 209 
 210 static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode,
 211                                             const char *propname)
 212 {
 213         return fwnode_property_read_u32_array(fwnode, propname, NULL, 0);
 214 }
 215 
 216 static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
 217                                             const char *propname)
 218 {
 219         return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
 220 }
 221 
 222 /**
 223  * struct property_entry - "Built-in" device property representation.
 224  * @name: Name of the property.
 225  * @length: Length of data making up the value.
 226  * @is_array: True when the property is an array.
 227  * @type: Type of the data in unions.
 228  * @pointer: Pointer to the property (an array of items of the given type).
 229  * @value: Value of the property (when it is a single item of the given type).
 230  */
 231 struct property_entry {
 232         const char *name;
 233         size_t length;
 234         bool is_array;
 235         enum dev_prop_type type;
 236         union {
 237                 union {
 238                         const u8 *u8_data;
 239                         const u16 *u16_data;
 240                         const u32 *u32_data;
 241                         const u64 *u64_data;
 242                         const char * const *str;
 243                 } pointer;
 244                 union {
 245                         u8 u8_data;
 246                         u16 u16_data;
 247                         u32 u32_data;
 248                         u64 u64_data;
 249                         const char *str;
 250                 } value;
 251         };
 252 };
 253 
 254 /*
 255  * Note: the below four initializers for the anonymous union are carefully
 256  * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
 257  * and structs.
 258  */
 259 
 260 #define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _Type_, _val_)     \
 261 (struct property_entry) {                                               \
 262         .name = _name_,                                                 \
 263         .length = ARRAY_SIZE(_val_) * sizeof(_type_),                   \
 264         .is_array = true,                                               \
 265         .type = DEV_PROP_##_Type_,                                      \
 266         { .pointer = { ._type_##_data = _val_ } },                      \
 267 }
 268 
 269 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_)                  \
 270         PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, U8, _val_)
 271 #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_)                 \
 272         PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, U16, _val_)
 273 #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_)                 \
 274         PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, U32, _val_)
 275 #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_)                 \
 276         PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, U64, _val_)
 277 
 278 #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_)              \
 279 (struct property_entry) {                                       \
 280         .name = _name_,                                         \
 281         .length = ARRAY_SIZE(_val_) * sizeof(const char *),     \
 282         .is_array = true,                                       \
 283         .type = DEV_PROP_STRING,                                \
 284         { .pointer = { .str = _val_ } },                        \
 285 }
 286 
 287 #define PROPERTY_ENTRY_INTEGER(_name_, _type_, _Type_, _val_)   \
 288 (struct property_entry) {                                       \
 289         .name = _name_,                                         \
 290         .length = sizeof(_type_),                               \
 291         .type = DEV_PROP_##_Type_,                              \
 292         { .value = { ._type_##_data = _val_ } },                \
 293 }
 294 
 295 #define PROPERTY_ENTRY_U8(_name_, _val_)                \
 296         PROPERTY_ENTRY_INTEGER(_name_, u8, U8, _val_)
 297 #define PROPERTY_ENTRY_U16(_name_, _val_)               \
 298         PROPERTY_ENTRY_INTEGER(_name_, u16, U16, _val_)
 299 #define PROPERTY_ENTRY_U32(_name_, _val_)               \
 300         PROPERTY_ENTRY_INTEGER(_name_, u32, U32, _val_)
 301 #define PROPERTY_ENTRY_U64(_name_, _val_)               \
 302         PROPERTY_ENTRY_INTEGER(_name_, u64, U64, _val_)
 303 
 304 #define PROPERTY_ENTRY_STRING(_name_, _val_)            \
 305 (struct property_entry) {                               \
 306         .name = _name_,                                 \
 307         .length = sizeof(const char *),                 \
 308         .type = DEV_PROP_STRING,                        \
 309         { .value = { .str = _val_ } },                  \
 310 }
 311 
 312 #define PROPERTY_ENTRY_BOOL(_name_)             \
 313 (struct property_entry) {                       \
 314         .name = _name_,                         \
 315 }
 316 
 317 struct property_entry *
 318 property_entries_dup(const struct property_entry *properties);
 319 
 320 void property_entries_free(const struct property_entry *properties);
 321 
 322 int device_add_properties(struct device *dev,
 323                           const struct property_entry *properties);
 324 void device_remove_properties(struct device *dev);
 325 
 326 bool device_dma_supported(struct device *dev);
 327 
 328 enum dev_dma_attr device_get_dma_attr(struct device *dev);
 329 
 330 const void *device_get_match_data(struct device *dev);
 331 
 332 int device_get_phy_mode(struct device *dev);
 333 
 334 void *device_get_mac_address(struct device *dev, char *addr, int alen);
 335 
 336 int fwnode_get_phy_mode(struct fwnode_handle *fwnode);
 337 void *fwnode_get_mac_address(struct fwnode_handle *fwnode,
 338                              char *addr, int alen);
 339 struct fwnode_handle *fwnode_graph_get_next_endpoint(
 340         const struct fwnode_handle *fwnode, struct fwnode_handle *prev);
 341 struct fwnode_handle *
 342 fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode);
 343 struct fwnode_handle *fwnode_graph_get_remote_port_parent(
 344         const struct fwnode_handle *fwnode);
 345 struct fwnode_handle *fwnode_graph_get_remote_port(
 346         const struct fwnode_handle *fwnode);
 347 struct fwnode_handle *fwnode_graph_get_remote_endpoint(
 348         const struct fwnode_handle *fwnode);
 349 struct fwnode_handle *
 350 fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port,
 351                              u32 endpoint);
 352 
 353 /*
 354  * Fwnode lookup flags
 355  *
 356  * @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the
 357  *                              closest endpoint ID greater than the specified
 358  *                              one.
 359  * @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote
 360  *                                endpoint of the given endpoint belongs to,
 361  *                                may be disabled.
 362  */
 363 #define FWNODE_GRAPH_ENDPOINT_NEXT      BIT(0)
 364 #define FWNODE_GRAPH_DEVICE_DISABLED    BIT(1)
 365 
 366 struct fwnode_handle *
 367 fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
 368                                 u32 port, u32 endpoint, unsigned long flags);
 369 
 370 #define fwnode_graph_for_each_endpoint(fwnode, child)                   \
 371         for (child = NULL;                                              \
 372              (child = fwnode_graph_get_next_endpoint(fwnode, child)); )
 373 
 374 int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 375                                 struct fwnode_endpoint *endpoint);
 376 
 377 /* -------------------------------------------------------------------------- */
 378 /* Software fwnode support - when HW description is incomplete or missing */
 379 
 380 struct software_node;
 381 
 382 /**
 383  * struct software_node_ref_args - Reference with additional arguments
 384  * @node: Reference to a software node
 385  * @nargs: Number of elements in @args array
 386  * @args: Integer arguments
 387  */
 388 struct software_node_ref_args {
 389         const struct software_node *node;
 390         unsigned int nargs;
 391         u64 args[NR_FWNODE_REFERENCE_ARGS];
 392 };
 393 
 394 /**
 395  * struct software_node_reference - Named software node reference property
 396  * @name: Name of the property
 397  * @nrefs: Number of elements in @refs array
 398  * @refs: Array of references with optional arguments
 399  */
 400 struct software_node_reference {
 401         const char *name;
 402         unsigned int nrefs;
 403         const struct software_node_ref_args *refs;
 404 };
 405 
 406 /**
 407  * struct software_node - Software node description
 408  * @name: Name of the software node
 409  * @parent: Parent of the software node
 410  * @properties: Array of device properties
 411  * @references: Array of software node reference properties
 412  */
 413 struct software_node {
 414         const char *name;
 415         const struct software_node *parent;
 416         const struct property_entry *properties;
 417         const struct software_node_reference *references;
 418 };
 419 
 420 bool is_software_node(const struct fwnode_handle *fwnode);
 421 const struct software_node *to_software_node(struct fwnode_handle *fwnode);
 422 struct fwnode_handle *software_node_fwnode(const struct software_node *node);
 423 
 424 const struct software_node *
 425 software_node_find_by_name(const struct software_node *parent,
 426                            const char *name);
 427 
 428 int software_node_register_nodes(const struct software_node *nodes);
 429 void software_node_unregister_nodes(const struct software_node *nodes);
 430 
 431 int software_node_register(const struct software_node *node);
 432 
 433 int software_node_notify(struct device *dev, unsigned long action);
 434 
 435 struct fwnode_handle *
 436 fwnode_create_software_node(const struct property_entry *properties,
 437                             const struct fwnode_handle *parent);
 438 void fwnode_remove_software_node(struct fwnode_handle *fwnode);
 439 
 440 #endif /* _LINUX_PROPERTY_H_ */