1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * property.h - Unified device property interface.
5 * Copyright (C) 2014, Intel Corporation
10 #ifndef _LINUX_PROPERTY_H_
11 #define _LINUX_PROPERTY_H_
13 #include <linux/bits.h>
14 #include <linux/fwnode.h>
15 #include <linux/stddef.h>
16 #include <linux/types.h>
30 DEV_DMA_NOT_SUPPORTED,
35 const struct fwnode_handle *__dev_fwnode_const(const struct device *dev);
36 struct fwnode_handle *__dev_fwnode(struct device *dev);
37 #define dev_fwnode(dev) \
39 const struct device *: __dev_fwnode_const, \
40 struct device *: __dev_fwnode)(dev)
42 bool device_property_present(const struct device *dev, const char *propname);
43 int device_property_read_u8_array(const struct device *dev, const char *propname,
44 u8 *val, size_t nval);
45 int device_property_read_u16_array(const struct device *dev, const char *propname,
46 u16 *val, size_t nval);
47 int device_property_read_u32_array(const struct device *dev, const char *propname,
48 u32 *val, size_t nval);
49 int device_property_read_u64_array(const struct device *dev, const char *propname,
50 u64 *val, size_t nval);
51 int device_property_read_string_array(const struct device *dev, const char *propname,
52 const char **val, size_t nval);
53 int device_property_read_string(const struct device *dev, const char *propname,
55 int device_property_match_string(const struct device *dev,
56 const char *propname, const char *string);
58 bool fwnode_property_present(const struct fwnode_handle *fwnode,
59 const char *propname);
60 int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode,
61 const char *propname, u8 *val,
63 int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode,
64 const char *propname, u16 *val,
66 int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode,
67 const char *propname, u32 *val,
69 int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode,
70 const char *propname, u64 *val,
72 int fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
73 const char *propname, const char **val,
75 int fwnode_property_read_string(const struct fwnode_handle *fwnode,
76 const char *propname, const char **val);
77 int fwnode_property_match_string(const struct fwnode_handle *fwnode,
78 const char *propname, const char *string);
80 bool fwnode_device_is_available(const struct fwnode_handle *fwnode);
83 bool fwnode_device_is_compatible(const struct fwnode_handle *fwnode, const char *compat)
85 return fwnode_property_match_string(fwnode, "compatible", compat) >= 0;
88 int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
89 const char *prop, const char *nargs_prop,
90 unsigned int nargs, unsigned int index,
91 struct fwnode_reference_args *args);
93 struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
97 const char *fwnode_get_name(const struct fwnode_handle *fwnode);
98 const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode);
100 struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
101 struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
103 #define fwnode_for_each_parent_node(fwnode, parent) \
104 for (parent = fwnode_get_parent(fwnode); parent; \
105 parent = fwnode_get_next_parent(parent))
107 struct device *fwnode_get_next_parent_dev(const struct fwnode_handle *fwnode);
108 unsigned int fwnode_count_parents(const struct fwnode_handle *fwn);
109 struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn,
111 bool fwnode_is_ancestor_of(const struct fwnode_handle *ancestor, const struct fwnode_handle *child);
112 struct fwnode_handle *fwnode_get_next_child_node(
113 const struct fwnode_handle *fwnode, struct fwnode_handle *child);
114 struct fwnode_handle *fwnode_get_next_available_child_node(
115 const struct fwnode_handle *fwnode, struct fwnode_handle *child);
117 #define fwnode_for_each_child_node(fwnode, child) \
118 for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
119 child = fwnode_get_next_child_node(fwnode, child))
121 #define fwnode_for_each_available_child_node(fwnode, child) \
122 for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
123 child = fwnode_get_next_available_child_node(fwnode, child))
125 struct fwnode_handle *device_get_next_child_node(const struct device *dev,
126 struct fwnode_handle *child);
128 #define device_for_each_child_node(dev, child) \
129 for (child = device_get_next_child_node(dev, NULL); child; \
130 child = device_get_next_child_node(dev, child))
132 struct fwnode_handle *fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
133 const char *childname);
134 struct fwnode_handle *device_get_named_child_node(const struct device *dev,
135 const char *childname);
137 struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode);
138 void fwnode_handle_put(struct fwnode_handle *fwnode);
140 int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);
141 int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name);
143 unsigned int device_get_child_node_count(const struct device *dev);
145 static inline bool device_property_read_bool(const struct device *dev,
146 const char *propname)
148 return device_property_present(dev, propname);
151 static inline int device_property_read_u8(const struct device *dev,
152 const char *propname, u8 *val)
154 return device_property_read_u8_array(dev, propname, val, 1);
157 static inline int device_property_read_u16(const struct device *dev,
158 const char *propname, u16 *val)
160 return device_property_read_u16_array(dev, propname, val, 1);
163 static inline int device_property_read_u32(const struct device *dev,
164 const char *propname, u32 *val)
166 return device_property_read_u32_array(dev, propname, val, 1);
169 static inline int device_property_read_u64(const struct device *dev,
170 const char *propname, u64 *val)
172 return device_property_read_u64_array(dev, propname, val, 1);
175 static inline int device_property_count_u8(const struct device *dev, const char *propname)
177 return device_property_read_u8_array(dev, propname, NULL, 0);
180 static inline int device_property_count_u16(const struct device *dev, const char *propname)
182 return device_property_read_u16_array(dev, propname, NULL, 0);
185 static inline int device_property_count_u32(const struct device *dev, const char *propname)
187 return device_property_read_u32_array(dev, propname, NULL, 0);
190 static inline int device_property_count_u64(const struct device *dev, const char *propname)
192 return device_property_read_u64_array(dev, propname, NULL, 0);
195 static inline int device_property_string_array_count(const struct device *dev,
196 const char *propname)
198 return device_property_read_string_array(dev, propname, NULL, 0);
201 static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode,
202 const char *propname)
204 return fwnode_property_present(fwnode, propname);
207 static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode,
208 const char *propname, u8 *val)
210 return fwnode_property_read_u8_array(fwnode, propname, val, 1);
213 static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode,
214 const char *propname, u16 *val)
216 return fwnode_property_read_u16_array(fwnode, propname, val, 1);
219 static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode,
220 const char *propname, u32 *val)
222 return fwnode_property_read_u32_array(fwnode, propname, val, 1);
225 static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode,
226 const char *propname, u64 *val)
228 return fwnode_property_read_u64_array(fwnode, propname, val, 1);
231 static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode,
232 const char *propname)
234 return fwnode_property_read_u8_array(fwnode, propname, NULL, 0);
237 static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode,
238 const char *propname)
240 return fwnode_property_read_u16_array(fwnode, propname, NULL, 0);
243 static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode,
244 const char *propname)
246 return fwnode_property_read_u32_array(fwnode, propname, NULL, 0);
249 static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
250 const char *propname)
252 return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
256 fwnode_property_string_array_count(const struct fwnode_handle *fwnode,
257 const char *propname)
259 return fwnode_property_read_string_array(fwnode, propname, NULL, 0);
262 struct software_node;
265 * struct software_node_ref_args - Reference property with additional arguments
266 * @node: Reference to a software node
267 * @nargs: Number of elements in @args array
268 * @args: Integer arguments
270 struct software_node_ref_args {
271 const struct software_node *node;
273 u64 args[NR_FWNODE_REFERENCE_ARGS];
276 #define SOFTWARE_NODE_REFERENCE(_ref_, ...) \
277 (const struct software_node_ref_args) { \
279 .nargs = ARRAY_SIZE(((u64[]){ 0, ##__VA_ARGS__ })) - 1, \
280 .args = { __VA_ARGS__ }, \
284 * struct property_entry - "Built-in" device property representation.
285 * @name: Name of the property.
286 * @length: Length of data making up the value.
287 * @is_inline: True when the property value is stored inline.
288 * @type: Type of the data in unions.
289 * @pointer: Pointer to the property when it is not stored inline.
290 * @value: Value of the property when it is stored inline.
292 struct property_entry {
296 enum dev_prop_type type;
300 u8 u8_data[sizeof(u64) / sizeof(u8)];
301 u16 u16_data[sizeof(u64) / sizeof(u16)];
302 u32 u32_data[sizeof(u64) / sizeof(u32)];
303 u64 u64_data[sizeof(u64) / sizeof(u64)];
304 const char *str[sizeof(u64) / sizeof(char *)];
310 * Note: the below initializers for the anonymous union are carefully
311 * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
314 #define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_) \
315 (struct property_entry) { \
317 .length = (_len_) * sizeof_field(struct property_entry, value._elem_[0]), \
318 .type = DEV_PROP_##_Type_, \
319 { .pointer = _val_ }, \
322 #define PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, _len_) \
323 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u8_data, U8, _val_, _len_)
324 #define PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, _len_) \
325 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u16_data, U16, _val_, _len_)
326 #define PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, _len_) \
327 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u32_data, U32, _val_, _len_)
328 #define PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, _len_) \
329 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u64_data, U64, _val_, _len_)
330 #define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_) \
331 __PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_)
333 #define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_) \
334 (struct property_entry) { \
336 .length = (_len_) * sizeof(struct software_node_ref_args), \
337 .type = DEV_PROP_REF, \
338 { .pointer = _val_ }, \
341 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \
342 PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
343 #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \
344 PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
345 #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \
346 PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
347 #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \
348 PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
349 #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \
350 PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
351 #define PROPERTY_ENTRY_REF_ARRAY(_name_, _val_) \
352 PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
354 #define __PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_) \
355 (struct property_entry) { \
357 .length = sizeof_field(struct property_entry, value._elem_[0]), \
359 .type = DEV_PROP_##_Type_, \
360 { .value = { ._elem_[0] = _val_ } }, \
363 #define PROPERTY_ENTRY_U8(_name_, _val_) \
364 __PROPERTY_ENTRY_ELEMENT(_name_, u8_data, U8, _val_)
365 #define PROPERTY_ENTRY_U16(_name_, _val_) \
366 __PROPERTY_ENTRY_ELEMENT(_name_, u16_data, U16, _val_)
367 #define PROPERTY_ENTRY_U32(_name_, _val_) \
368 __PROPERTY_ENTRY_ELEMENT(_name_, u32_data, U32, _val_)
369 #define PROPERTY_ENTRY_U64(_name_, _val_) \
370 __PROPERTY_ENTRY_ELEMENT(_name_, u64_data, U64, _val_)
371 #define PROPERTY_ENTRY_STRING(_name_, _val_) \
372 __PROPERTY_ENTRY_ELEMENT(_name_, str, STRING, _val_)
374 #define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \
375 (struct property_entry) { \
377 .length = sizeof(struct software_node_ref_args), \
378 .type = DEV_PROP_REF, \
379 { .pointer = &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__), }, \
382 #define PROPERTY_ENTRY_BOOL(_name_) \
383 (struct property_entry) { \
388 struct property_entry *
389 property_entries_dup(const struct property_entry *properties);
390 void property_entries_free(const struct property_entry *properties);
392 bool device_dma_supported(const struct device *dev);
393 enum dev_dma_attr device_get_dma_attr(const struct device *dev);
395 const void *device_get_match_data(const struct device *dev);
397 int device_get_phy_mode(struct device *dev);
398 int fwnode_get_phy_mode(const struct fwnode_handle *fwnode);
400 void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index);
402 struct fwnode_handle *fwnode_graph_get_next_endpoint(
403 const struct fwnode_handle *fwnode, struct fwnode_handle *prev);
404 struct fwnode_handle *
405 fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode);
406 struct fwnode_handle *fwnode_graph_get_remote_port_parent(
407 const struct fwnode_handle *fwnode);
408 struct fwnode_handle *fwnode_graph_get_remote_port(
409 const struct fwnode_handle *fwnode);
410 struct fwnode_handle *fwnode_graph_get_remote_endpoint(
411 const struct fwnode_handle *fwnode);
413 static inline bool fwnode_graph_is_endpoint(const struct fwnode_handle *fwnode)
415 return fwnode_property_present(fwnode, "remote-endpoint");
419 * Fwnode lookup flags
421 * @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the
422 * closest endpoint ID greater than the specified
424 * @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote
425 * endpoint of the given endpoint belongs to,
426 * may be disabled, or that the endpoint is not
429 #define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0)
430 #define FWNODE_GRAPH_DEVICE_DISABLED BIT(1)
432 struct fwnode_handle *
433 fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
434 u32 port, u32 endpoint, unsigned long flags);
435 unsigned int fwnode_graph_get_endpoint_count(const struct fwnode_handle *fwnode,
436 unsigned long flags);
438 #define fwnode_graph_for_each_endpoint(fwnode, child) \
439 for (child = fwnode_graph_get_next_endpoint(fwnode, NULL); child; \
440 child = fwnode_graph_get_next_endpoint(fwnode, child))
442 int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
443 struct fwnode_endpoint *endpoint);
445 typedef void *(*devcon_match_fn_t)(const struct fwnode_handle *fwnode, const char *id,
448 void *fwnode_connection_find_match(const struct fwnode_handle *fwnode,
449 const char *con_id, void *data,
450 devcon_match_fn_t match);
452 static inline void *device_connection_find_match(const struct device *dev,
453 const char *con_id, void *data,
454 devcon_match_fn_t match)
456 return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match);
459 int fwnode_connection_find_matches(const struct fwnode_handle *fwnode,
460 const char *con_id, void *data,
461 devcon_match_fn_t match,
462 void **matches, unsigned int matches_len);
464 /* -------------------------------------------------------------------------- */
465 /* Software fwnode support - when HW description is incomplete or missing */
468 * struct software_node - Software node description
469 * @name: Name of the software node
470 * @parent: Parent of the software node
471 * @properties: Array of device properties
473 struct software_node {
475 const struct software_node *parent;
476 const struct property_entry *properties;
479 bool is_software_node(const struct fwnode_handle *fwnode);
480 const struct software_node *
481 to_software_node(const struct fwnode_handle *fwnode);
482 struct fwnode_handle *software_node_fwnode(const struct software_node *node);
484 const struct software_node *
485 software_node_find_by_name(const struct software_node *parent,
488 int software_node_register_node_group(const struct software_node **node_group);
489 void software_node_unregister_node_group(const struct software_node **node_group);
491 int software_node_register(const struct software_node *node);
492 void software_node_unregister(const struct software_node *node);
494 struct fwnode_handle *
495 fwnode_create_software_node(const struct property_entry *properties,
496 const struct fwnode_handle *parent);
497 void fwnode_remove_software_node(struct fwnode_handle *fwnode);
499 int device_add_software_node(struct device *dev, const struct software_node *node);
500 void device_remove_software_node(struct device *dev);
502 int device_create_managed_software_node(struct device *dev,
503 const struct property_entry *properties,
504 const struct software_node *parent);
506 #endif /* _LINUX_PROPERTY_H_ */