1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_RESET_H_
3 #define _LINUX_RESET_H_
4
5 #include <linux/err.h>
6 #include <linux/errno.h>
7 #include <linux/types.h>
8
9 struct device;
10 struct device_node;
11 struct reset_control;
12
13 /**
14 * struct reset_control_bulk_data - Data used for bulk reset control operations.
15 *
16 * @id: reset control consumer ID
17 * @rstc: struct reset_control * to store the associated reset control
18 *
19 * The reset APIs provide a series of reset_control_bulk_*() API calls as
20 * a convenience to consumers which require multiple reset controls.
21 * This structure is used to manage data for these calls.
22 */
23 struct reset_control_bulk_data {
24 const char *id;
25 struct reset_control *rstc;
26 };
27
28 #define RESET_CONTROL_FLAGS_BIT_SHARED BIT(0) /* not exclusive */
29 #define RESET_CONTROL_FLAGS_BIT_OPTIONAL BIT(1)
30 #define RESET_CONTROL_FLAGS_BIT_ACQUIRED BIT(2) /* iff exclusive, not released */
31 #define RESET_CONTROL_FLAGS_BIT_DEASSERTED BIT(3)
32
33 /**
34 * enum reset_control_flags - Flags that can be passed to the reset_control_get functions
35 * to determine the type of reset control.
36 * These values cannot be OR'd.
37 *
38 * @RESET_CONTROL_EXCLUSIVE: exclusive, acquired,
39 * @RESET_CONTROL_EXCLUSIVE_DEASSERTED: exclusive, acquired, deasserted
40 * @RESET_CONTROL_EXCLUSIVE_RELEASED: exclusive, released,
41 * @RESET_CONTROL_SHARED: shared
42 * @RESET_CONTROL_SHARED_DEASSERTED: shared, deasserted
43 * @RESET_CONTROL_OPTIONAL_EXCLUSIVE: optional, exclusive, acquired
44 * @RESET_CONTROL_OPTIONAL_EXCLUSIVE_DEASSERTED: optional, exclusive, acquired, deasserted
45 * @RESET_CONTROL_OPTIONAL_EXCLUSIVE_RELEASED: optional, exclusive, released
46 * @RESET_CONTROL_OPTIONAL_SHARED: optional, shared
47 * @RESET_CONTROL_OPTIONAL_SHARED_DEASSERTED: optional, shared, deasserted
48 */
49 enum reset_control_flags {
50 RESET_CONTROL_EXCLUSIVE = RESET_CONTROL_FLAGS_BIT_ACQUIRED,
51 RESET_CONTROL_EXCLUSIVE_DEASSERTED = RESET_CONTROL_FLAGS_BIT_ACQUIRED |
52 RESET_CONTROL_FLAGS_BIT_DEASSERTED,
53 RESET_CONTROL_EXCLUSIVE_RELEASED = 0,
54 RESET_CONTROL_SHARED = RESET_CONTROL_FLAGS_BIT_SHARED,
55 RESET_CONTROL_SHARED_DEASSERTED = RESET_CONTROL_FLAGS_BIT_SHARED |
56 RESET_CONTROL_FLAGS_BIT_DEASSERTED,
57 RESET_CONTROL_OPTIONAL_EXCLUSIVE = RESET_CONTROL_FLAGS_BIT_OPTIONAL |
58 RESET_CONTROL_FLAGS_BIT_ACQUIRED,
59 RESET_CONTROL_OPTIONAL_EXCLUSIVE_DEASSERTED = RESET_CONTROL_FLAGS_BIT_OPTIONAL |
60 RESET_CONTROL_FLAGS_BIT_ACQUIRED |
61 RESET_CONTROL_FLAGS_BIT_DEASSERTED,
62 RESET_CONTROL_OPTIONAL_EXCLUSIVE_RELEASED = RESET_CONTROL_FLAGS_BIT_OPTIONAL,
63 RESET_CONTROL_OPTIONAL_SHARED = RESET_CONTROL_FLAGS_BIT_OPTIONAL |
64 RESET_CONTROL_FLAGS_BIT_SHARED,
65 RESET_CONTROL_OPTIONAL_SHARED_DEASSERTED = RESET_CONTROL_FLAGS_BIT_OPTIONAL |
66 RESET_CONTROL_FLAGS_BIT_SHARED |
67 RESET_CONTROL_FLAGS_BIT_DEASSERTED,
68 };
69
70 #ifdef CONFIG_RESET_CONTROLLER
71
72 int reset_control_reset(struct reset_control *rstc);
73 int reset_control_rearm(struct reset_control *rstc);
74 int reset_control_assert(struct reset_control *rstc);
75 int reset_control_deassert(struct reset_control *rstc);
76 int reset_control_status(struct reset_control *rstc);
77 int reset_control_acquire(struct reset_control *rstc);
78 void reset_control_release(struct reset_control *rstc);
79
80 int reset_control_bulk_reset(int num_rstcs, struct reset_control_bulk_data *rstcs);
81 int reset_control_bulk_assert(int num_rstcs, struct reset_control_bulk_data *rstcs);
82 int reset_control_bulk_deassert(int num_rstcs, struct reset_control_bulk_data *rstcs);
83 int reset_control_bulk_acquire(int num_rstcs, struct reset_control_bulk_data *rstcs);
84 void reset_control_bulk_release(int num_rstcs, struct reset_control_bulk_data *rstcs);
85
86 struct reset_control *__of_reset_control_get(struct device_node *node,
87 const char *id, int index, enum reset_control_flags flags);
88 struct reset_control *__reset_control_get(struct device *dev, const char *id,
89 int index, enum reset_control_flags flags);
90 void reset_control_put(struct reset_control *rstc);
91 int __reset_control_bulk_get(struct device *dev, int num_rstcs,
92 struct reset_control_bulk_data *rstcs,
93 enum reset_control_flags flags);
94 void reset_control_bulk_put(int num_rstcs, struct reset_control_bulk_data *rstcs);
95
96 int __device_reset(struct device *dev, bool optional);
97 struct reset_control *__devm_reset_control_get(struct device *dev,
98 const char *id, int index, enum reset_control_flags flags);
99 int __devm_reset_control_bulk_get(struct device *dev, int num_rstcs,
100 struct reset_control_bulk_data *rstcs,
101 enum reset_control_flags flags);
102
103 struct reset_control *devm_reset_control_array_get(struct device *dev,
104 enum reset_control_flags flags);
105 struct reset_control *of_reset_control_array_get(struct device_node *np, enum reset_control_flags);
106
107 int reset_control_get_count(struct device *dev);
108
109 #else
110
reset_control_reset(struct reset_control * rstc)111 static inline int reset_control_reset(struct reset_control *rstc)
112 {
113 return 0;
114 }
115
reset_control_rearm(struct reset_control * rstc)116 static inline int reset_control_rearm(struct reset_control *rstc)
117 {
118 return 0;
119 }
120
reset_control_assert(struct reset_control * rstc)121 static inline int reset_control_assert(struct reset_control *rstc)
122 {
123 return 0;
124 }
125
reset_control_deassert(struct reset_control * rstc)126 static inline int reset_control_deassert(struct reset_control *rstc)
127 {
128 return 0;
129 }
130
reset_control_status(struct reset_control * rstc)131 static inline int reset_control_status(struct reset_control *rstc)
132 {
133 return 0;
134 }
135
reset_control_acquire(struct reset_control * rstc)136 static inline int reset_control_acquire(struct reset_control *rstc)
137 {
138 return 0;
139 }
140
reset_control_release(struct reset_control * rstc)141 static inline void reset_control_release(struct reset_control *rstc)
142 {
143 }
144
reset_control_put(struct reset_control * rstc)145 static inline void reset_control_put(struct reset_control *rstc)
146 {
147 }
148
__device_reset(struct device * dev,bool optional)149 static inline int __device_reset(struct device *dev, bool optional)
150 {
151 return optional ? 0 : -ENOTSUPP;
152 }
153
__of_reset_control_get(struct device_node * node,const char * id,int index,enum reset_control_flags flags)154 static inline struct reset_control *__of_reset_control_get(
155 struct device_node *node,
156 const char *id, int index, enum reset_control_flags flags)
157 {
158 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
159
160 return optional ? NULL : ERR_PTR(-ENOTSUPP);
161 }
162
__reset_control_get(struct device * dev,const char * id,int index,enum reset_control_flags flags)163 static inline struct reset_control *__reset_control_get(
164 struct device *dev, const char *id,
165 int index, enum reset_control_flags flags)
166 {
167 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
168
169 return optional ? NULL : ERR_PTR(-ENOTSUPP);
170 }
171
172 static inline int
reset_control_bulk_reset(int num_rstcs,struct reset_control_bulk_data * rstcs)173 reset_control_bulk_reset(int num_rstcs, struct reset_control_bulk_data *rstcs)
174 {
175 return 0;
176 }
177
178 static inline int
reset_control_bulk_assert(int num_rstcs,struct reset_control_bulk_data * rstcs)179 reset_control_bulk_assert(int num_rstcs, struct reset_control_bulk_data *rstcs)
180 {
181 return 0;
182 }
183
184 static inline int
reset_control_bulk_deassert(int num_rstcs,struct reset_control_bulk_data * rstcs)185 reset_control_bulk_deassert(int num_rstcs, struct reset_control_bulk_data *rstcs)
186 {
187 return 0;
188 }
189
190 static inline int
reset_control_bulk_acquire(int num_rstcs,struct reset_control_bulk_data * rstcs)191 reset_control_bulk_acquire(int num_rstcs, struct reset_control_bulk_data *rstcs)
192 {
193 return 0;
194 }
195
196 static inline void
reset_control_bulk_release(int num_rstcs,struct reset_control_bulk_data * rstcs)197 reset_control_bulk_release(int num_rstcs, struct reset_control_bulk_data *rstcs)
198 {
199 }
200
201 static inline int
__reset_control_bulk_get(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs,enum reset_control_flags flags)202 __reset_control_bulk_get(struct device *dev, int num_rstcs,
203 struct reset_control_bulk_data *rstcs,
204 enum reset_control_flags flags)
205 {
206 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
207
208 return optional ? 0 : -EOPNOTSUPP;
209 }
210
211 static inline void
reset_control_bulk_put(int num_rstcs,struct reset_control_bulk_data * rstcs)212 reset_control_bulk_put(int num_rstcs, struct reset_control_bulk_data *rstcs)
213 {
214 }
215
__devm_reset_control_get(struct device * dev,const char * id,int index,enum reset_control_flags flags)216 static inline struct reset_control *__devm_reset_control_get(
217 struct device *dev, const char *id,
218 int index, enum reset_control_flags flags)
219 {
220 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
221
222 return optional ? NULL : ERR_PTR(-ENOTSUPP);
223 }
224
225 static inline int
__devm_reset_control_bulk_get(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs,enum reset_control_flags flags)226 __devm_reset_control_bulk_get(struct device *dev, int num_rstcs,
227 struct reset_control_bulk_data *rstcs,
228 enum reset_control_flags flags)
229 {
230 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
231
232 return optional ? 0 : -EOPNOTSUPP;
233 }
234
235 static inline struct reset_control *
devm_reset_control_array_get(struct device * dev,enum reset_control_flags flags)236 devm_reset_control_array_get(struct device *dev, enum reset_control_flags flags)
237 {
238 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
239
240 return optional ? NULL : ERR_PTR(-ENOTSUPP);
241 }
242
243 static inline struct reset_control *
of_reset_control_array_get(struct device_node * np,enum reset_control_flags flags)244 of_reset_control_array_get(struct device_node *np, enum reset_control_flags flags)
245 {
246 bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
247
248 return optional ? NULL : ERR_PTR(-ENOTSUPP);
249 }
250
reset_control_get_count(struct device * dev)251 static inline int reset_control_get_count(struct device *dev)
252 {
253 return -ENOENT;
254 }
255
256 #endif /* CONFIG_RESET_CONTROLLER */
257
device_reset(struct device * dev)258 static inline int __must_check device_reset(struct device *dev)
259 {
260 return __device_reset(dev, false);
261 }
262
device_reset_optional(struct device * dev)263 static inline int device_reset_optional(struct device *dev)
264 {
265 return __device_reset(dev, true);
266 }
267
268 /**
269 * reset_control_get_exclusive - Lookup and obtain an exclusive reference
270 * to a reset controller.
271 * @dev: device to be reset by the controller
272 * @id: reset line name
273 *
274 * Returns a struct reset_control or IS_ERR() condition containing errno.
275 * If this function is called more than once for the same reset_control it will
276 * return -EBUSY.
277 *
278 * See reset_control_get_shared() for details on shared references to
279 * reset-controls.
280 *
281 * Use of id names is optional.
282 */
283 static inline struct reset_control *
reset_control_get_exclusive(struct device * dev,const char * id)284 __must_check reset_control_get_exclusive(struct device *dev, const char *id)
285 {
286 return __reset_control_get(dev, id, 0, RESET_CONTROL_EXCLUSIVE);
287 }
288
289 /**
290 * reset_control_bulk_get_exclusive - Lookup and obtain exclusive references to
291 * multiple reset controllers.
292 * @dev: device to be reset by the controller
293 * @num_rstcs: number of entries in rstcs array
294 * @rstcs: array of struct reset_control_bulk_data with reset line names set
295 *
296 * Fills the rstcs array with pointers to exclusive reset controls and
297 * returns 0, or an IS_ERR() condition containing errno.
298 */
299 static inline int __must_check
reset_control_bulk_get_exclusive(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)300 reset_control_bulk_get_exclusive(struct device *dev, int num_rstcs,
301 struct reset_control_bulk_data *rstcs)
302 {
303 return __reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_EXCLUSIVE);
304 }
305
306 /**
307 * reset_control_get_exclusive_released - Lookup and obtain a temoprarily
308 * exclusive reference to a reset
309 * controller.
310 * @dev: device to be reset by the controller
311 * @id: reset line name
312 *
313 * Returns a struct reset_control or IS_ERR() condition containing errno.
314 * reset-controls returned by this function must be acquired via
315 * reset_control_acquire() before they can be used and should be released
316 * via reset_control_release() afterwards.
317 *
318 * Use of id names is optional.
319 */
320 static inline struct reset_control *
reset_control_get_exclusive_released(struct device * dev,const char * id)321 __must_check reset_control_get_exclusive_released(struct device *dev,
322 const char *id)
323 {
324 return __reset_control_get(dev, id, 0, RESET_CONTROL_EXCLUSIVE_RELEASED);
325 }
326
327 /**
328 * reset_control_bulk_get_exclusive_released - Lookup and obtain temporarily
329 * exclusive references to multiple reset
330 * controllers.
331 * @dev: device to be reset by the controller
332 * @num_rstcs: number of entries in rstcs array
333 * @rstcs: array of struct reset_control_bulk_data with reset line names set
334 *
335 * Fills the rstcs array with pointers to exclusive reset controls and
336 * returns 0, or an IS_ERR() condition containing errno.
337 * reset-controls returned by this function must be acquired via
338 * reset_control_bulk_acquire() before they can be used and should be released
339 * via reset_control_bulk_release() afterwards.
340 */
341 static inline int __must_check
reset_control_bulk_get_exclusive_released(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)342 reset_control_bulk_get_exclusive_released(struct device *dev, int num_rstcs,
343 struct reset_control_bulk_data *rstcs)
344 {
345 return __reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_EXCLUSIVE_RELEASED);
346 }
347
348 /**
349 * reset_control_bulk_get_optional_exclusive_released - Lookup and obtain optional
350 * temporarily exclusive references to multiple
351 * reset controllers.
352 * @dev: device to be reset by the controller
353 * @num_rstcs: number of entries in rstcs array
354 * @rstcs: array of struct reset_control_bulk_data with reset line names set
355 *
356 * Optional variant of reset_control_bulk_get_exclusive_released(). If the
357 * requested reset is not specified in the device tree, this function returns 0
358 * instead of an error and missing rtsc is set to NULL.
359 *
360 * See reset_control_bulk_get_exclusive_released() for more information.
361 */
362 static inline int __must_check
reset_control_bulk_get_optional_exclusive_released(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)363 reset_control_bulk_get_optional_exclusive_released(struct device *dev, int num_rstcs,
364 struct reset_control_bulk_data *rstcs)
365 {
366 return __reset_control_bulk_get(dev, num_rstcs, rstcs,
367 RESET_CONTROL_OPTIONAL_EXCLUSIVE_RELEASED);
368 }
369
370 /**
371 * reset_control_get_shared - Lookup and obtain a shared reference to a
372 * reset controller.
373 * @dev: device to be reset by the controller
374 * @id: reset line name
375 *
376 * Returns a struct reset_control or IS_ERR() condition containing errno.
377 * This function is intended for use with reset-controls which are shared
378 * between hardware blocks.
379 *
380 * When a reset-control is shared, the behavior of reset_control_assert /
381 * deassert is changed, the reset-core will keep track of a deassert_count
382 * and only (re-)assert the reset after reset_control_assert has been called
383 * as many times as reset_control_deassert was called. Also see the remark
384 * about shared reset-controls in the reset_control_assert docs.
385 *
386 * Calling reset_control_assert without first calling reset_control_deassert
387 * is not allowed on a shared reset control. Calling reset_control_reset is
388 * also not allowed on a shared reset control.
389 *
390 * Use of id names is optional.
391 */
reset_control_get_shared(struct device * dev,const char * id)392 static inline struct reset_control *reset_control_get_shared(
393 struct device *dev, const char *id)
394 {
395 return __reset_control_get(dev, id, 0, RESET_CONTROL_SHARED);
396 }
397
398 /**
399 * reset_control_bulk_get_shared - Lookup and obtain shared references to
400 * multiple reset controllers.
401 * @dev: device to be reset by the controller
402 * @num_rstcs: number of entries in rstcs array
403 * @rstcs: array of struct reset_control_bulk_data with reset line names set
404 *
405 * Fills the rstcs array with pointers to shared reset controls and
406 * returns 0, or an IS_ERR() condition containing errno.
407 */
408 static inline int __must_check
reset_control_bulk_get_shared(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)409 reset_control_bulk_get_shared(struct device *dev, int num_rstcs,
410 struct reset_control_bulk_data *rstcs)
411 {
412 return __reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_SHARED);
413 }
414
415 /**
416 * reset_control_get_optional_exclusive - optional reset_control_get_exclusive()
417 * @dev: device to be reset by the controller
418 * @id: reset line name
419 *
420 * Optional variant of reset_control_get_exclusive(). If the requested reset
421 * is not specified in the device tree, this function returns NULL instead of
422 * an error.
423 *
424 * See reset_control_get_exclusive() for more information.
425 */
reset_control_get_optional_exclusive(struct device * dev,const char * id)426 static inline struct reset_control *reset_control_get_optional_exclusive(
427 struct device *dev, const char *id)
428 {
429 return __reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_EXCLUSIVE);
430 }
431
432 /**
433 * reset_control_bulk_get_optional_exclusive - optional
434 * reset_control_bulk_get_exclusive()
435 * @dev: device to be reset by the controller
436 * @num_rstcs: number of entries in rstcs array
437 * @rstcs: array of struct reset_control_bulk_data with reset line names set
438 *
439 * Optional variant of reset_control_bulk_get_exclusive(). If any of the
440 * requested resets are not specified in the device tree, this function sets
441 * them to NULL instead of returning an error.
442 *
443 * See reset_control_bulk_get_exclusive() for more information.
444 */
445 static inline int __must_check
reset_control_bulk_get_optional_exclusive(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)446 reset_control_bulk_get_optional_exclusive(struct device *dev, int num_rstcs,
447 struct reset_control_bulk_data *rstcs)
448 {
449 return __reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_OPTIONAL_EXCLUSIVE);
450 }
451
452 /**
453 * reset_control_get_optional_shared - optional reset_control_get_shared()
454 * @dev: device to be reset by the controller
455 * @id: reset line name
456 *
457 * Optional variant of reset_control_get_shared(). If the requested reset
458 * is not specified in the device tree, this function returns NULL instead of
459 * an error.
460 *
461 * See reset_control_get_shared() for more information.
462 */
reset_control_get_optional_shared(struct device * dev,const char * id)463 static inline struct reset_control *reset_control_get_optional_shared(
464 struct device *dev, const char *id)
465 {
466 return __reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_SHARED);
467 }
468
469 /**
470 * reset_control_bulk_get_optional_shared - optional
471 * reset_control_bulk_get_shared()
472 * @dev: device to be reset by the controller
473 * @num_rstcs: number of entries in rstcs array
474 * @rstcs: array of struct reset_control_bulk_data with reset line names set
475 *
476 * Optional variant of reset_control_bulk_get_shared(). If the requested resets
477 * are not specified in the device tree, this function sets them to NULL
478 * instead of returning an error.
479 *
480 * See reset_control_bulk_get_shared() for more information.
481 */
482 static inline int __must_check
reset_control_bulk_get_optional_shared(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)483 reset_control_bulk_get_optional_shared(struct device *dev, int num_rstcs,
484 struct reset_control_bulk_data *rstcs)
485 {
486 return __reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_OPTIONAL_SHARED);
487 }
488
489 /**
490 * of_reset_control_get_exclusive - Lookup and obtain an exclusive reference
491 * to a reset controller.
492 * @node: device to be reset by the controller
493 * @id: reset line name
494 *
495 * Returns a struct reset_control or IS_ERR() condition containing errno.
496 *
497 * Use of id names is optional.
498 */
of_reset_control_get_exclusive(struct device_node * node,const char * id)499 static inline struct reset_control *of_reset_control_get_exclusive(
500 struct device_node *node, const char *id)
501 {
502 return __of_reset_control_get(node, id, 0, RESET_CONTROL_EXCLUSIVE);
503 }
504
505 /**
506 * of_reset_control_get_optional_exclusive - Lookup and obtain an optional exclusive
507 * reference to a reset controller.
508 * @node: device to be reset by the controller
509 * @id: reset line name
510 *
511 * Optional variant of of_reset_control_get_exclusive(). If the requested reset
512 * is not specified in the device tree, this function returns NULL instead of
513 * an error.
514 *
515 * Returns a struct reset_control or IS_ERR() condition containing errno.
516 *
517 * Use of id names is optional.
518 */
of_reset_control_get_optional_exclusive(struct device_node * node,const char * id)519 static inline struct reset_control *of_reset_control_get_optional_exclusive(
520 struct device_node *node, const char *id)
521 {
522 return __of_reset_control_get(node, id, 0, RESET_CONTROL_OPTIONAL_EXCLUSIVE);
523 }
524
525 /**
526 * of_reset_control_get_shared - Lookup and obtain a shared reference
527 * to a reset controller.
528 * @node: device to be reset by the controller
529 * @id: reset line name
530 *
531 * When a reset-control is shared, the behavior of reset_control_assert /
532 * deassert is changed, the reset-core will keep track of a deassert_count
533 * and only (re-)assert the reset after reset_control_assert has been called
534 * as many times as reset_control_deassert was called. Also see the remark
535 * about shared reset-controls in the reset_control_assert docs.
536 *
537 * Calling reset_control_assert without first calling reset_control_deassert
538 * is not allowed on a shared reset control. Calling reset_control_reset is
539 * also not allowed on a shared reset control.
540 * Returns a struct reset_control or IS_ERR() condition containing errno.
541 *
542 * Use of id names is optional.
543 */
of_reset_control_get_shared(struct device_node * node,const char * id)544 static inline struct reset_control *of_reset_control_get_shared(
545 struct device_node *node, const char *id)
546 {
547 return __of_reset_control_get(node, id, 0, RESET_CONTROL_SHARED);
548 }
549
550 /**
551 * of_reset_control_get_exclusive_by_index - Lookup and obtain an exclusive
552 * reference to a reset controller
553 * by index.
554 * @node: device to be reset by the controller
555 * @index: index of the reset controller
556 *
557 * This is to be used to perform a list of resets for a device or power domain
558 * in whatever order. Returns a struct reset_control or IS_ERR() condition
559 * containing errno.
560 */
of_reset_control_get_exclusive_by_index(struct device_node * node,int index)561 static inline struct reset_control *of_reset_control_get_exclusive_by_index(
562 struct device_node *node, int index)
563 {
564 return __of_reset_control_get(node, NULL, index, RESET_CONTROL_EXCLUSIVE);
565 }
566
567 /**
568 * of_reset_control_get_shared_by_index - Lookup and obtain a shared
569 * reference to a reset controller
570 * by index.
571 * @node: device to be reset by the controller
572 * @index: index of the reset controller
573 *
574 * When a reset-control is shared, the behavior of reset_control_assert /
575 * deassert is changed, the reset-core will keep track of a deassert_count
576 * and only (re-)assert the reset after reset_control_assert has been called
577 * as many times as reset_control_deassert was called. Also see the remark
578 * about shared reset-controls in the reset_control_assert docs.
579 *
580 * Calling reset_control_assert without first calling reset_control_deassert
581 * is not allowed on a shared reset control. Calling reset_control_reset is
582 * also not allowed on a shared reset control.
583 * Returns a struct reset_control or IS_ERR() condition containing errno.
584 *
585 * This is to be used to perform a list of resets for a device or power domain
586 * in whatever order. Returns a struct reset_control or IS_ERR() condition
587 * containing errno.
588 */
of_reset_control_get_shared_by_index(struct device_node * node,int index)589 static inline struct reset_control *of_reset_control_get_shared_by_index(
590 struct device_node *node, int index)
591 {
592 return __of_reset_control_get(node, NULL, index, RESET_CONTROL_SHARED);
593 }
594
595 /**
596 * devm_reset_control_get_exclusive - resource managed
597 * reset_control_get_exclusive()
598 * @dev: device to be reset by the controller
599 * @id: reset line name
600 *
601 * Managed reset_control_get_exclusive(). For reset controllers returned
602 * from this function, reset_control_put() is called automatically on driver
603 * detach.
604 *
605 * See reset_control_get_exclusive() for more information.
606 */
607 static inline struct reset_control *
devm_reset_control_get_exclusive(struct device * dev,const char * id)608 __must_check devm_reset_control_get_exclusive(struct device *dev,
609 const char *id)
610 {
611 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_EXCLUSIVE);
612 }
613
614 /**
615 * devm_reset_control_get_exclusive_deasserted - resource managed
616 * reset_control_get_exclusive() +
617 * reset_control_deassert()
618 * @dev: device to be reset by the controller
619 * @id: reset line name
620 *
621 * Managed reset_control_get_exclusive() + reset_control_deassert(). For reset
622 * controllers returned from this function, reset_control_assert() +
623 * reset_control_put() is called automatically on driver detach.
624 *
625 * See reset_control_get_exclusive() for more information.
626 */
627 static inline struct reset_control * __must_check
devm_reset_control_get_exclusive_deasserted(struct device * dev,const char * id)628 devm_reset_control_get_exclusive_deasserted(struct device *dev, const char *id)
629 {
630 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_EXCLUSIVE_DEASSERTED);
631 }
632
633 /**
634 * devm_reset_control_bulk_get_exclusive - resource managed
635 * reset_control_bulk_get_exclusive()
636 * @dev: device to be reset by the controller
637 * @num_rstcs: number of entries in rstcs array
638 * @rstcs: array of struct reset_control_bulk_data with reset line names set
639 *
640 * Managed reset_control_bulk_get_exclusive(). For reset controllers returned
641 * from this function, reset_control_put() is called automatically on driver
642 * detach.
643 *
644 * See reset_control_bulk_get_exclusive() for more information.
645 */
646 static inline int __must_check
devm_reset_control_bulk_get_exclusive(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)647 devm_reset_control_bulk_get_exclusive(struct device *dev, int num_rstcs,
648 struct reset_control_bulk_data *rstcs)
649 {
650 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs,
651 RESET_CONTROL_EXCLUSIVE);
652 }
653
654 /**
655 * devm_reset_control_get_exclusive_released - resource managed
656 * reset_control_get_exclusive_released()
657 * @dev: device to be reset by the controller
658 * @id: reset line name
659 *
660 * Managed reset_control_get_exclusive_released(). For reset controllers
661 * returned from this function, reset_control_put() is called automatically on
662 * driver detach.
663 *
664 * See reset_control_get_exclusive_released() for more information.
665 */
666 static inline struct reset_control *
devm_reset_control_get_exclusive_released(struct device * dev,const char * id)667 __must_check devm_reset_control_get_exclusive_released(struct device *dev,
668 const char *id)
669 {
670 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_EXCLUSIVE_RELEASED);
671 }
672
673 /**
674 * devm_reset_control_bulk_get_exclusive_released - resource managed
675 * reset_control_bulk_get_exclusive_released()
676 * @dev: device to be reset by the controller
677 * @num_rstcs: number of entries in rstcs array
678 * @rstcs: array of struct reset_control_bulk_data with reset line names set
679 *
680 * Managed reset_control_bulk_get_exclusive_released(). For reset controllers
681 * returned from this function, reset_control_put() is called automatically on
682 * driver detach.
683 *
684 * See reset_control_bulk_get_exclusive_released() for more information.
685 */
686 static inline int __must_check
devm_reset_control_bulk_get_exclusive_released(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)687 devm_reset_control_bulk_get_exclusive_released(struct device *dev, int num_rstcs,
688 struct reset_control_bulk_data *rstcs)
689 {
690 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs,
691 RESET_CONTROL_EXCLUSIVE_RELEASED);
692 }
693
694 /**
695 * devm_reset_control_get_optional_exclusive_released - resource managed
696 * reset_control_get_optional_exclusive_released()
697 * @dev: device to be reset by the controller
698 * @id: reset line name
699 *
700 * Managed-and-optional variant of reset_control_get_exclusive_released(). For
701 * reset controllers returned from this function, reset_control_put() is called
702 * automatically on driver detach.
703 *
704 * See reset_control_get_exclusive_released() for more information.
705 */
706 static inline struct reset_control *
devm_reset_control_get_optional_exclusive_released(struct device * dev,const char * id)707 __must_check devm_reset_control_get_optional_exclusive_released(struct device *dev,
708 const char *id)
709 {
710 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_EXCLUSIVE_RELEASED);
711 }
712
713 /**
714 * devm_reset_control_bulk_get_optional_exclusive_released - resource managed
715 * reset_control_bulk_optional_get_exclusive_released()
716 * @dev: device to be reset by the controller
717 * @num_rstcs: number of entries in rstcs array
718 * @rstcs: array of struct reset_control_bulk_data with reset line names set
719 *
720 * Managed reset_control_bulk_optional_get_exclusive_released(). For reset
721 * controllers returned from this function, reset_control_put() is called
722 * automatically on driver detach.
723 *
724 * See reset_control_bulk_optional_get_exclusive_released() for more information.
725 */
726 static inline int __must_check
devm_reset_control_bulk_get_optional_exclusive_released(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)727 devm_reset_control_bulk_get_optional_exclusive_released(struct device *dev, int num_rstcs,
728 struct reset_control_bulk_data *rstcs)
729 {
730 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs,
731 RESET_CONTROL_OPTIONAL_EXCLUSIVE_RELEASED);
732 }
733
734 /**
735 * devm_reset_control_get_shared - resource managed reset_control_get_shared()
736 * @dev: device to be reset by the controller
737 * @id: reset line name
738 *
739 * Managed reset_control_get_shared(). For reset controllers returned from
740 * this function, reset_control_put() is called automatically on driver detach.
741 * See reset_control_get_shared() for more information.
742 */
devm_reset_control_get_shared(struct device * dev,const char * id)743 static inline struct reset_control *devm_reset_control_get_shared(
744 struct device *dev, const char *id)
745 {
746 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_SHARED);
747 }
748
749 /**
750 * devm_reset_control_get_shared_deasserted - resource managed
751 * reset_control_get_shared() +
752 * reset_control_deassert()
753 * @dev: device to be reset by the controller
754 * @id: reset line name
755 *
756 * Managed reset_control_get_shared() + reset_control_deassert(). For reset
757 * controllers returned from this function, reset_control_assert() +
758 * reset_control_put() is called automatically on driver detach.
759 *
760 * See devm_reset_control_get_shared() for more information.
761 */
762 static inline struct reset_control * __must_check
devm_reset_control_get_shared_deasserted(struct device * dev,const char * id)763 devm_reset_control_get_shared_deasserted(struct device *dev, const char *id)
764 {
765 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_SHARED_DEASSERTED);
766 }
767
768 /**
769 * devm_reset_control_bulk_get_shared - resource managed
770 * reset_control_bulk_get_shared()
771 * @dev: device to be reset by the controller
772 * @num_rstcs: number of entries in rstcs array
773 * @rstcs: array of struct reset_control_bulk_data with reset line names set
774 *
775 * Managed reset_control_bulk_get_shared(). For reset controllers returned
776 * from this function, reset_control_put() is called automatically on driver
777 * detach.
778 *
779 * See reset_control_bulk_get_shared() for more information.
780 */
781 static inline int __must_check
devm_reset_control_bulk_get_shared(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)782 devm_reset_control_bulk_get_shared(struct device *dev, int num_rstcs,
783 struct reset_control_bulk_data *rstcs)
784 {
785 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_SHARED);
786 }
787
788 /**
789 * devm_reset_control_bulk_get_shared_deasserted - resource managed
790 * reset_control_bulk_get_shared() +
791 * reset_control_bulk_deassert()
792 * @dev: device to be reset by the controller
793 * @num_rstcs: number of entries in rstcs array
794 * @rstcs: array of struct reset_control_bulk_data with reset line names set
795 *
796 * Managed reset_control_bulk_get_shared() + reset_control_bulk_deassert(). For
797 * reset controllers returned from this function, reset_control_bulk_assert() +
798 * reset_control_bulk_put() are called automatically on driver detach.
799 *
800 * See devm_reset_control_bulk_get_shared() for more information.
801 */
802 static inline int __must_check
devm_reset_control_bulk_get_shared_deasserted(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)803 devm_reset_control_bulk_get_shared_deasserted(struct device *dev, int num_rstcs,
804 struct reset_control_bulk_data *rstcs)
805 {
806 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs,
807 RESET_CONTROL_SHARED_DEASSERTED);
808 }
809
810 /**
811 * devm_reset_control_get_optional_exclusive - resource managed
812 * reset_control_get_optional_exclusive()
813 * @dev: device to be reset by the controller
814 * @id: reset line name
815 *
816 * Managed reset_control_get_optional_exclusive(). For reset controllers
817 * returned from this function, reset_control_put() is called automatically on
818 * driver detach.
819 *
820 * See reset_control_get_optional_exclusive() for more information.
821 */
devm_reset_control_get_optional_exclusive(struct device * dev,const char * id)822 static inline struct reset_control *devm_reset_control_get_optional_exclusive(
823 struct device *dev, const char *id)
824 {
825 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_EXCLUSIVE);
826 }
827
828 /**
829 * devm_reset_control_get_optional_exclusive_deasserted - resource managed
830 * reset_control_get_optional_exclusive() +
831 * reset_control_deassert()
832 * @dev: device to be reset by the controller
833 * @id: reset line name
834 *
835 * Managed reset_control_get_optional_exclusive() + reset_control_deassert().
836 * For reset controllers returned from this function, reset_control_assert() +
837 * reset_control_put() is called automatically on driver detach.
838 *
839 * See devm_reset_control_get_optional_exclusive() for more information.
840 */
841 static inline struct reset_control *
devm_reset_control_get_optional_exclusive_deasserted(struct device * dev,const char * id)842 devm_reset_control_get_optional_exclusive_deasserted(struct device *dev, const char *id)
843 {
844 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_EXCLUSIVE_DEASSERTED);
845 }
846
847 /**
848 * devm_reset_control_bulk_get_optional_exclusive - resource managed
849 * reset_control_bulk_get_optional_exclusive()
850 * @dev: device to be reset by the controller
851 * @num_rstcs: number of entries in rstcs array
852 * @rstcs: array of struct reset_control_bulk_data with reset line names set
853 *
854 * Managed reset_control_bulk_get_optional_exclusive(). For reset controllers
855 * returned from this function, reset_control_put() is called automatically on
856 * driver detach.
857 *
858 * See reset_control_bulk_get_optional_exclusive() for more information.
859 */
860 static inline int __must_check
devm_reset_control_bulk_get_optional_exclusive(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)861 devm_reset_control_bulk_get_optional_exclusive(struct device *dev, int num_rstcs,
862 struct reset_control_bulk_data *rstcs)
863 {
864 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs,
865 RESET_CONTROL_OPTIONAL_EXCLUSIVE);
866 }
867
868 /**
869 * devm_reset_control_get_optional_shared - resource managed
870 * reset_control_get_optional_shared()
871 * @dev: device to be reset by the controller
872 * @id: reset line name
873 *
874 * Managed reset_control_get_optional_shared(). For reset controllers returned
875 * from this function, reset_control_put() is called automatically on driver
876 * detach.
877 *
878 * See reset_control_get_optional_shared() for more information.
879 */
devm_reset_control_get_optional_shared(struct device * dev,const char * id)880 static inline struct reset_control *devm_reset_control_get_optional_shared(
881 struct device *dev, const char *id)
882 {
883 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_SHARED);
884 }
885
886 /**
887 * devm_reset_control_get_optional_shared_deasserted - resource managed
888 * reset_control_get_optional_shared() +
889 * reset_control_deassert()
890 * @dev: device to be reset by the controller
891 * @id: reset line name
892 *
893 * Managed reset_control_get_optional_shared() + reset_control_deassert(). For
894 * reset controllers returned from this function, reset_control_assert() +
895 * reset_control_put() is called automatically on driver detach.
896 *
897 * See devm_reset_control_get_optional_shared() for more information.
898 */
899 static inline struct reset_control *
devm_reset_control_get_optional_shared_deasserted(struct device * dev,const char * id)900 devm_reset_control_get_optional_shared_deasserted(struct device *dev, const char *id)
901 {
902 return __devm_reset_control_get(dev, id, 0, RESET_CONTROL_OPTIONAL_SHARED_DEASSERTED);
903 }
904
905 /**
906 * devm_reset_control_bulk_get_optional_shared - resource managed
907 * reset_control_bulk_get_optional_shared()
908 * @dev: device to be reset by the controller
909 * @num_rstcs: number of entries in rstcs array
910 * @rstcs: array of struct reset_control_bulk_data with reset line names set
911 *
912 * Managed reset_control_bulk_get_optional_shared(). For reset controllers
913 * returned from this function, reset_control_put() is called automatically on
914 * driver detach.
915 *
916 * See reset_control_bulk_get_optional_shared() for more information.
917 */
918 static inline int __must_check
devm_reset_control_bulk_get_optional_shared(struct device * dev,int num_rstcs,struct reset_control_bulk_data * rstcs)919 devm_reset_control_bulk_get_optional_shared(struct device *dev, int num_rstcs,
920 struct reset_control_bulk_data *rstcs)
921 {
922 return __devm_reset_control_bulk_get(dev, num_rstcs, rstcs, RESET_CONTROL_OPTIONAL_SHARED);
923 }
924
925 /**
926 * devm_reset_control_get_exclusive_by_index - resource managed
927 * reset_control_get_exclusive()
928 * @dev: device to be reset by the controller
929 * @index: index of the reset controller
930 *
931 * Managed reset_control_get_exclusive(). For reset controllers returned from
932 * this function, reset_control_put() is called automatically on driver
933 * detach.
934 *
935 * See reset_control_get_exclusive() for more information.
936 */
937 static inline struct reset_control *
devm_reset_control_get_exclusive_by_index(struct device * dev,int index)938 devm_reset_control_get_exclusive_by_index(struct device *dev, int index)
939 {
940 return __devm_reset_control_get(dev, NULL, index, RESET_CONTROL_EXCLUSIVE);
941 }
942
943 /**
944 * devm_reset_control_get_shared_by_index - resource managed
945 * reset_control_get_shared
946 * @dev: device to be reset by the controller
947 * @index: index of the reset controller
948 *
949 * Managed reset_control_get_shared(). For reset controllers returned from
950 * this function, reset_control_put() is called automatically on driver detach.
951 * See reset_control_get_shared() for more information.
952 */
953 static inline struct reset_control *
devm_reset_control_get_shared_by_index(struct device * dev,int index)954 devm_reset_control_get_shared_by_index(struct device *dev, int index)
955 {
956 return __devm_reset_control_get(dev, NULL, index, RESET_CONTROL_SHARED);
957 }
958
959 /*
960 * TEMPORARY calls to use during transition:
961 *
962 * of_reset_control_get() => of_reset_control_get_exclusive()
963 *
964 * These inline function calls will be removed once all consumers
965 * have been moved over to the new explicit API.
966 */
of_reset_control_get(struct device_node * node,const char * id)967 static inline struct reset_control *of_reset_control_get(
968 struct device_node *node, const char *id)
969 {
970 return of_reset_control_get_exclusive(node, id);
971 }
972
of_reset_control_get_by_index(struct device_node * node,int index)973 static inline struct reset_control *of_reset_control_get_by_index(
974 struct device_node *node, int index)
975 {
976 return of_reset_control_get_exclusive_by_index(node, index);
977 }
978
devm_reset_control_get(struct device * dev,const char * id)979 static inline struct reset_control *devm_reset_control_get(
980 struct device *dev, const char *id)
981 {
982 return devm_reset_control_get_exclusive(dev, id);
983 }
984
devm_reset_control_get_optional(struct device * dev,const char * id)985 static inline struct reset_control *devm_reset_control_get_optional(
986 struct device *dev, const char *id)
987 {
988 return devm_reset_control_get_optional_exclusive(dev, id);
989
990 }
991
devm_reset_control_get_by_index(struct device * dev,int index)992 static inline struct reset_control *devm_reset_control_get_by_index(
993 struct device *dev, int index)
994 {
995 return devm_reset_control_get_exclusive_by_index(dev, index);
996 }
997
998 /*
999 * APIs to manage a list of reset controllers
1000 */
1001 static inline struct reset_control *
devm_reset_control_array_get_exclusive(struct device * dev)1002 devm_reset_control_array_get_exclusive(struct device *dev)
1003 {
1004 return devm_reset_control_array_get(dev, RESET_CONTROL_EXCLUSIVE);
1005 }
1006
1007 static inline struct reset_control *
devm_reset_control_array_get_shared(struct device * dev)1008 devm_reset_control_array_get_shared(struct device *dev)
1009 {
1010 return devm_reset_control_array_get(dev, RESET_CONTROL_SHARED);
1011 }
1012
1013 static inline struct reset_control *
devm_reset_control_array_get_optional_exclusive(struct device * dev)1014 devm_reset_control_array_get_optional_exclusive(struct device *dev)
1015 {
1016 return devm_reset_control_array_get(dev, RESET_CONTROL_OPTIONAL_EXCLUSIVE);
1017 }
1018
1019 static inline struct reset_control *
devm_reset_control_array_get_optional_shared(struct device * dev)1020 devm_reset_control_array_get_optional_shared(struct device *dev)
1021 {
1022 return devm_reset_control_array_get(dev, RESET_CONTROL_OPTIONAL_SHARED);
1023 }
1024
1025 static inline struct reset_control *
of_reset_control_array_get_exclusive(struct device_node * node)1026 of_reset_control_array_get_exclusive(struct device_node *node)
1027 {
1028 return of_reset_control_array_get(node, RESET_CONTROL_EXCLUSIVE);
1029 }
1030
1031 static inline struct reset_control *
of_reset_control_array_get_exclusive_released(struct device_node * node)1032 of_reset_control_array_get_exclusive_released(struct device_node *node)
1033 {
1034 return of_reset_control_array_get(node, RESET_CONTROL_EXCLUSIVE_RELEASED);
1035 }
1036
1037 static inline struct reset_control *
of_reset_control_array_get_shared(struct device_node * node)1038 of_reset_control_array_get_shared(struct device_node *node)
1039 {
1040 return of_reset_control_array_get(node, RESET_CONTROL_SHARED);
1041 }
1042
1043 static inline struct reset_control *
of_reset_control_array_get_optional_exclusive(struct device_node * node)1044 of_reset_control_array_get_optional_exclusive(struct device_node *node)
1045 {
1046 return of_reset_control_array_get(node, RESET_CONTROL_OPTIONAL_EXCLUSIVE);
1047 }
1048
1049 static inline struct reset_control *
of_reset_control_array_get_optional_shared(struct device_node * node)1050 of_reset_control_array_get_optional_shared(struct device_node *node)
1051 {
1052 return of_reset_control_array_get(node, RESET_CONTROL_OPTIONAL_SHARED);
1053 }
1054 #endif
1055