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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
b31384fa RW |
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> | |
b31384fa RW |
8 | */ |
9 | ||
10 | #ifndef _LINUX_PROPERTY_H_ | |
11 | #define _LINUX_PROPERTY_H_ | |
12 | ||
0fcc2bdc | 13 | #include <linux/bits.h> |
ce793486 | 14 | #include <linux/fwnode.h> |
b31384fa RW |
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 | ||
1b9863c6 SS |
28 | enum dev_dma_attr { |
29 | DEV_DMA_NOT_SUPPORTED, | |
30 | DEV_DMA_NON_COHERENT, | |
31 | DEV_DMA_COHERENT, | |
32 | }; | |
33 | ||
e44bb0cb SA |
34 | struct fwnode_handle *dev_fwnode(struct device *dev); |
35 | ||
b31384fa RW |
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); | |
3f5c8d31 MW |
49 | int device_property_match_string(struct device *dev, |
50 | const char *propname, const char *string); | |
b31384fa | 51 | |
37ba983c SA |
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, | |
8a0662d9 RW |
56 | const char *propname, u8 *val, |
57 | size_t nval); | |
37ba983c | 58 | int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
59 | const char *propname, u16 *val, |
60 | size_t nval); | |
37ba983c | 61 | int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
62 | const char *propname, u32 *val, |
63 | size_t nval); | |
37ba983c | 64 | int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
65 | const char *propname, u64 *val, |
66 | size_t nval); | |
37ba983c | 67 | int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
68 | const char *propname, const char **val, |
69 | size_t nval); | |
37ba983c | 70 | int fwnode_property_read_string(const struct fwnode_handle *fwnode, |
8a0662d9 | 71 | const char *propname, const char **val); |
37ba983c | 72 | int fwnode_property_match_string(const struct fwnode_handle *fwnode, |
3f5c8d31 | 73 | const char *propname, const char *string); |
3e3119d3 SA |
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); | |
8a0662d9 | 78 | |
83b34afb HK |
79 | struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, |
80 | const char *name, | |
81 | unsigned int index); | |
82 | ||
bc0500c1 | 83 | const char *fwnode_get_name(const struct fwnode_handle *fwnode); |
e7e242bc | 84 | const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode); |
37ba983c SA |
85 | struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); |
86 | struct fwnode_handle *fwnode_get_next_parent( | |
87 | struct fwnode_handle *fwnode); | |
87e5e95d SA |
88 | unsigned int fwnode_count_parents(const struct fwnode_handle *fwn); |
89 | struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn, | |
90 | unsigned int depth); | |
37ba983c SA |
91 | struct fwnode_handle *fwnode_get_next_child_node( |
92 | const struct fwnode_handle *fwnode, struct fwnode_handle *child); | |
3395de96 MW |
93 | struct fwnode_handle *fwnode_get_next_available_child_node( |
94 | const struct fwnode_handle *fwnode, struct fwnode_handle *child); | |
34055190 MW |
95 | |
96 | #define fwnode_for_each_child_node(fwnode, child) \ | |
97 | for (child = fwnode_get_next_child_node(fwnode, NULL); child; \ | |
98 | child = fwnode_get_next_child_node(fwnode, child)) | |
afaf26fd | 99 | |
3395de96 MW |
100 | #define fwnode_for_each_available_child_node(fwnode, child) \ |
101 | for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\ | |
102 | child = fwnode_get_next_available_child_node(fwnode, child)) | |
103 | ||
37ba983c SA |
104 | struct fwnode_handle *device_get_next_child_node( |
105 | struct device *dev, struct fwnode_handle *child); | |
8a0662d9 | 106 | |
1d656fb7 AS |
107 | #define device_for_each_child_node(dev, child) \ |
108 | for (child = device_get_next_child_node(dev, NULL); child; \ | |
8a0662d9 RW |
109 | child = device_get_next_child_node(dev, child)) |
110 | ||
37ba983c SA |
111 | struct fwnode_handle *fwnode_get_named_child_node( |
112 | const struct fwnode_handle *fwnode, const char *childname); | |
613e9721 AT |
113 | struct fwnode_handle *device_get_named_child_node(struct device *dev, |
114 | const char *childname); | |
115 | ||
cf89a31c | 116 | struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); |
8a0662d9 RW |
117 | void fwnode_handle_put(struct fwnode_handle *fwnode); |
118 | ||
7c6c57f2 MW |
119 | int fwnode_irq_get(struct fwnode_handle *fwnode, unsigned int index); |
120 | ||
8a0662d9 RW |
121 | unsigned int device_get_child_node_count(struct device *dev); |
122 | ||
b31384fa RW |
123 | static inline bool device_property_read_bool(struct device *dev, |
124 | const char *propname) | |
125 | { | |
126 | return device_property_present(dev, propname); | |
127 | } | |
128 | ||
129 | static inline int device_property_read_u8(struct device *dev, | |
130 | const char *propname, u8 *val) | |
131 | { | |
132 | return device_property_read_u8_array(dev, propname, val, 1); | |
133 | } | |
134 | ||
135 | static inline int device_property_read_u16(struct device *dev, | |
136 | const char *propname, u16 *val) | |
137 | { | |
138 | return device_property_read_u16_array(dev, propname, val, 1); | |
139 | } | |
140 | ||
141 | static inline int device_property_read_u32(struct device *dev, | |
142 | const char *propname, u32 *val) | |
143 | { | |
144 | return device_property_read_u32_array(dev, propname, val, 1); | |
145 | } | |
146 | ||
147 | static inline int device_property_read_u64(struct device *dev, | |
148 | const char *propname, u64 *val) | |
149 | { | |
150 | return device_property_read_u64_array(dev, propname, val, 1); | |
151 | } | |
152 | ||
33ee09cd AS |
153 | static inline int device_property_count_u8(struct device *dev, const char *propname) |
154 | { | |
155 | return device_property_read_u8_array(dev, propname, NULL, 0); | |
156 | } | |
157 | ||
158 | static inline int device_property_count_u16(struct device *dev, const char *propname) | |
159 | { | |
160 | return device_property_read_u16_array(dev, propname, NULL, 0); | |
161 | } | |
162 | ||
163 | static inline int device_property_count_u32(struct device *dev, const char *propname) | |
164 | { | |
165 | return device_property_read_u32_array(dev, propname, NULL, 0); | |
166 | } | |
167 | ||
168 | static inline int device_property_count_u64(struct device *dev, const char *propname) | |
169 | { | |
170 | return device_property_read_u64_array(dev, propname, NULL, 0); | |
171 | } | |
172 | ||
37ba983c | 173 | static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
174 | const char *propname) |
175 | { | |
176 | return fwnode_property_present(fwnode, propname); | |
177 | } | |
178 | ||
37ba983c | 179 | static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
180 | const char *propname, u8 *val) |
181 | { | |
182 | return fwnode_property_read_u8_array(fwnode, propname, val, 1); | |
183 | } | |
184 | ||
37ba983c | 185 | static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
186 | const char *propname, u16 *val) |
187 | { | |
188 | return fwnode_property_read_u16_array(fwnode, propname, val, 1); | |
189 | } | |
190 | ||
37ba983c | 191 | static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
192 | const char *propname, u32 *val) |
193 | { | |
194 | return fwnode_property_read_u32_array(fwnode, propname, val, 1); | |
195 | } | |
196 | ||
37ba983c | 197 | static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
198 | const char *propname, u64 *val) |
199 | { | |
200 | return fwnode_property_read_u64_array(fwnode, propname, val, 1); | |
201 | } | |
202 | ||
33ee09cd AS |
203 | static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode, |
204 | const char *propname) | |
205 | { | |
206 | return fwnode_property_read_u8_array(fwnode, propname, NULL, 0); | |
207 | } | |
208 | ||
209 | static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode, | |
210 | const char *propname) | |
211 | { | |
212 | return fwnode_property_read_u16_array(fwnode, propname, NULL, 0); | |
213 | } | |
214 | ||
215 | static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode, | |
216 | const char *propname) | |
217 | { | |
218 | return fwnode_property_read_u32_array(fwnode, propname, NULL, 0); | |
219 | } | |
220 | ||
221 | static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode, | |
222 | const char *propname) | |
223 | { | |
224 | return fwnode_property_read_u64_array(fwnode, propname, NULL, 0); | |
225 | } | |
226 | ||
16ba08d5 RW |
227 | /** |
228 | * struct property_entry - "Built-in" device property representation. | |
229 | * @name: Name of the property. | |
318a1971 | 230 | * @length: Length of data making up the value. |
66586bab | 231 | * @is_array: True when the property is an array. |
63dcc709 | 232 | * @type: Type of the data in unions. |
66586bab AS |
233 | * @pointer: Pointer to the property (an array of items of the given type). |
234 | * @value: Value of the property (when it is a single item of the given type). | |
16ba08d5 RW |
235 | */ |
236 | struct property_entry { | |
237 | const char *name; | |
318a1971 | 238 | size_t length; |
66586bab | 239 | bool is_array; |
63dcc709 | 240 | enum dev_prop_type type; |
16ba08d5 | 241 | union { |
66586bab | 242 | union { |
9426998c DT |
243 | const u8 *u8_data; |
244 | const u16 *u16_data; | |
245 | const u32 *u32_data; | |
246 | const u64 *u64_data; | |
247 | const char * const *str; | |
66586bab AS |
248 | } pointer; |
249 | union { | |
66586bab AS |
250 | u8 u8_data; |
251 | u16 u16_data; | |
252 | u32 u32_data; | |
253 | u64 u64_data; | |
254 | const char *str; | |
255 | } value; | |
256 | }; | |
16ba08d5 RW |
257 | }; |
258 | ||
d76eebfa AM |
259 | /* |
260 | * Note: the below four initializers for the anonymous union are carefully | |
261 | * crafted to avoid gcc-4.4.4's problems with initialization of anon unions | |
262 | * and structs. | |
263 | */ | |
264 | ||
63dcc709 AS |
265 | #define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _Type_, _val_) \ |
266 | (struct property_entry) { \ | |
267 | .name = _name_, \ | |
268 | .length = ARRAY_SIZE(_val_) * sizeof(_type_), \ | |
269 | .is_array = true, \ | |
270 | .type = DEV_PROP_##_Type_, \ | |
271 | { .pointer = { ._type_##_data = _val_ } }, \ | |
a85f4204 HK |
272 | } |
273 | ||
274 | #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \ | |
63dcc709 | 275 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, U8, _val_) |
a85f4204 | 276 | #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \ |
63dcc709 | 277 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, U16, _val_) |
a85f4204 | 278 | #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \ |
63dcc709 | 279 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, U32, _val_) |
a85f4204 | 280 | #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \ |
63dcc709 | 281 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, U64, _val_) |
a85f4204 HK |
282 | |
283 | #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \ | |
c505cbd4 | 284 | (struct property_entry) { \ |
a85f4204 HK |
285 | .name = _name_, \ |
286 | .length = ARRAY_SIZE(_val_) * sizeof(const char *), \ | |
287 | .is_array = true, \ | |
63dcc709 | 288 | .type = DEV_PROP_STRING, \ |
d76eebfa | 289 | { .pointer = { .str = _val_ } }, \ |
a85f4204 HK |
290 | } |
291 | ||
63dcc709 AS |
292 | #define PROPERTY_ENTRY_INTEGER(_name_, _type_, _Type_, _val_) \ |
293 | (struct property_entry) { \ | |
294 | .name = _name_, \ | |
295 | .length = sizeof(_type_), \ | |
296 | .type = DEV_PROP_##_Type_, \ | |
297 | { .value = { ._type_##_data = _val_ } }, \ | |
a85f4204 HK |
298 | } |
299 | ||
300 | #define PROPERTY_ENTRY_U8(_name_, _val_) \ | |
63dcc709 | 301 | PROPERTY_ENTRY_INTEGER(_name_, u8, U8, _val_) |
a85f4204 | 302 | #define PROPERTY_ENTRY_U16(_name_, _val_) \ |
63dcc709 | 303 | PROPERTY_ENTRY_INTEGER(_name_, u16, U16, _val_) |
a85f4204 | 304 | #define PROPERTY_ENTRY_U32(_name_, _val_) \ |
63dcc709 | 305 | PROPERTY_ENTRY_INTEGER(_name_, u32, U32, _val_) |
a85f4204 | 306 | #define PROPERTY_ENTRY_U64(_name_, _val_) \ |
63dcc709 | 307 | PROPERTY_ENTRY_INTEGER(_name_, u64, U64, _val_) |
a85f4204 HK |
308 | |
309 | #define PROPERTY_ENTRY_STRING(_name_, _val_) \ | |
c505cbd4 | 310 | (struct property_entry) { \ |
a85f4204 | 311 | .name = _name_, \ |
2b6e4924 | 312 | .length = sizeof(const char *), \ |
63dcc709 | 313 | .type = DEV_PROP_STRING, \ |
aace7367 | 314 | { .value = { .str = _val_ } }, \ |
a85f4204 HK |
315 | } |
316 | ||
317 | #define PROPERTY_ENTRY_BOOL(_name_) \ | |
c505cbd4 | 318 | (struct property_entry) { \ |
a85f4204 HK |
319 | .name = _name_, \ |
320 | } | |
321 | ||
2d479e1f DT |
322 | struct property_entry * |
323 | property_entries_dup(const struct property_entry *properties); | |
324 | ||
325 | void property_entries_free(const struct property_entry *properties); | |
326 | ||
f4d05266 | 327 | int device_add_properties(struct device *dev, |
bec84da8 | 328 | const struct property_entry *properties); |
f4d05266 | 329 | void device_remove_properties(struct device *dev); |
16ba08d5 | 330 | |
e5e55864 SS |
331 | bool device_dma_supported(struct device *dev); |
332 | ||
333 | enum dev_dma_attr device_get_dma_attr(struct device *dev); | |
b283f157 | 334 | |
67dcc26d | 335 | const void *device_get_match_data(struct device *dev); |
e5e55864 | 336 | |
4c96b7dc JL |
337 | int device_get_phy_mode(struct device *dev); |
338 | ||
339 | void *device_get_mac_address(struct device *dev, char *addr, int alen); | |
340 | ||
b28f263b | 341 | int fwnode_get_phy_mode(struct fwnode_handle *fwnode); |
babe2dbb MW |
342 | void *fwnode_get_mac_address(struct fwnode_handle *fwnode, |
343 | char *addr, int alen); | |
07bb80d4 | 344 | struct fwnode_handle *fwnode_graph_get_next_endpoint( |
37ba983c | 345 | const struct fwnode_handle *fwnode, struct fwnode_handle *prev); |
6a71d8d7 | 346 | struct fwnode_handle * |
37ba983c | 347 | fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode); |
07bb80d4 | 348 | struct fwnode_handle *fwnode_graph_get_remote_port_parent( |
37ba983c | 349 | const struct fwnode_handle *fwnode); |
07bb80d4 | 350 | struct fwnode_handle *fwnode_graph_get_remote_port( |
37ba983c | 351 | const struct fwnode_handle *fwnode); |
07bb80d4 | 352 | struct fwnode_handle *fwnode_graph_get_remote_endpoint( |
37ba983c SA |
353 | const struct fwnode_handle *fwnode); |
354 | struct fwnode_handle * | |
355 | fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port, | |
356 | u32 endpoint); | |
07bb80d4 | 357 | |
0fcc2bdc SA |
358 | /* |
359 | * Fwnode lookup flags | |
360 | * | |
361 | * @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the | |
362 | * closest endpoint ID greater than the specified | |
363 | * one. | |
364 | * @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote | |
365 | * endpoint of the given endpoint belongs to, | |
366 | * may be disabled. | |
367 | */ | |
368 | #define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0) | |
369 | #define FWNODE_GRAPH_DEVICE_DISABLED BIT(1) | |
370 | ||
371 | struct fwnode_handle * | |
372 | fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode, | |
373 | u32 port, u32 endpoint, unsigned long flags); | |
374 | ||
5e4b1b70 SA |
375 | #define fwnode_graph_for_each_endpoint(fwnode, child) \ |
376 | for (child = NULL; \ | |
377 | (child = fwnode_graph_get_next_endpoint(fwnode, child)); ) | |
378 | ||
37ba983c | 379 | int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, |
2bd5452d SA |
380 | struct fwnode_endpoint *endpoint); |
381 | ||
59abd836 HK |
382 | /* -------------------------------------------------------------------------- */ |
383 | /* Software fwnode support - when HW description is incomplete or missing */ | |
384 | ||
b06184ac HK |
385 | struct software_node; |
386 | ||
387 | /** | |
388 | * struct software_node_ref_args - Reference with additional arguments | |
389 | * @node: Reference to a software node | |
390 | * @nargs: Number of elements in @args array | |
391 | * @args: Integer arguments | |
392 | */ | |
393 | struct software_node_ref_args { | |
394 | const struct software_node *node; | |
395 | unsigned int nargs; | |
396 | u64 args[NR_FWNODE_REFERENCE_ARGS]; | |
397 | }; | |
398 | ||
399 | /** | |
400 | * struct software_node_reference - Named software node reference property | |
401 | * @name: Name of the property | |
402 | * @nrefs: Number of elements in @refs array | |
403 | * @refs: Array of references with optional arguments | |
404 | */ | |
405 | struct software_node_reference { | |
406 | const char *name; | |
407 | unsigned int nrefs; | |
408 | const struct software_node_ref_args *refs; | |
409 | }; | |
410 | ||
80488a6b HK |
411 | /** |
412 | * struct software_node - Software node description | |
413 | * @name: Name of the software node | |
414 | * @parent: Parent of the software node | |
415 | * @properties: Array of device properties | |
b06184ac | 416 | * @references: Array of software node reference properties |
80488a6b HK |
417 | */ |
418 | struct software_node { | |
419 | const char *name; | |
420 | const struct software_node *parent; | |
421 | const struct property_entry *properties; | |
b06184ac | 422 | const struct software_node_reference *references; |
80488a6b HK |
423 | }; |
424 | ||
59abd836 | 425 | bool is_software_node(const struct fwnode_handle *fwnode); |
56c9aa07 SA |
426 | const struct software_node * |
427 | to_software_node(const struct fwnode_handle *fwnode); | |
80488a6b HK |
428 | struct fwnode_handle *software_node_fwnode(const struct software_node *node); |
429 | ||
1666faed HK |
430 | const struct software_node * |
431 | software_node_find_by_name(const struct software_node *parent, | |
432 | const char *name); | |
433 | ||
80488a6b HK |
434 | int software_node_register_nodes(const struct software_node *nodes); |
435 | void software_node_unregister_nodes(const struct software_node *nodes); | |
436 | ||
437 | int software_node_register(const struct software_node *node); | |
59abd836 HK |
438 | |
439 | int software_node_notify(struct device *dev, unsigned long action); | |
440 | ||
441 | struct fwnode_handle * | |
442 | fwnode_create_software_node(const struct property_entry *properties, | |
443 | const struct fwnode_handle *parent); | |
444 | void fwnode_remove_software_node(struct fwnode_handle *fwnode); | |
445 | ||
b31384fa | 446 | #endif /* _LINUX_PROPERTY_H_ */ |