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1/*
2 * devres.c -- Voltage/Current Regulator framework devres implementation.
3 *
4 * Copyright 2013 Linaro Ltd
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 */
12
13#include <linux/kernel.h>
14#include <linux/err.h>
15#include <linux/regmap.h>
16#include <linux/regulator/consumer.h>
17#include <linux/regulator/driver.h>
18#include <linux/module.h>
19
20#include "internal.h"
21
22enum {
23 NORMAL_GET,
24 EXCLUSIVE_GET,
25 OPTIONAL_GET,
26};
27
28static void devm_regulator_release(struct device *dev, void *res)
29{
30 regulator_put(*(struct regulator **)res);
31}
32
33static struct regulator *_devm_regulator_get(struct device *dev, const char *id,
34 int get_type)
35{
36 struct regulator **ptr, *regulator;
37
38 ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
39 if (!ptr)
40 return ERR_PTR(-ENOMEM);
41
42 switch (get_type) {
43 case NORMAL_GET:
44 regulator = regulator_get(dev, id);
45 break;
46 case EXCLUSIVE_GET:
47 regulator = regulator_get_exclusive(dev, id);
48 break;
49 case OPTIONAL_GET:
50 regulator = regulator_get_optional(dev, id);
51 break;
52 default:
53 regulator = ERR_PTR(-EINVAL);
54 }
55
56 if (!IS_ERR(regulator)) {
57 *ptr = regulator;
58 devres_add(dev, ptr);
59 } else {
60 devres_free(ptr);
61 }
62
63 return regulator;
64}
65
66/**
67 * devm_regulator_get - Resource managed regulator_get()
68 * @dev: device for regulator "consumer"
69 * @id: Supply name or regulator ID.
70 *
71 * Managed regulator_get(). Regulators returned from this function are
72 * automatically regulator_put() on driver detach. See regulator_get() for more
73 * information.
74 */
75struct regulator *devm_regulator_get(struct device *dev, const char *id)
76{
77 return _devm_regulator_get(dev, id, NORMAL_GET);
78}
79EXPORT_SYMBOL_GPL(devm_regulator_get);
80
81/**
82 * devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
83 * @dev: device for regulator "consumer"
84 * @id: Supply name or regulator ID.
85 *
86 * Managed regulator_get_exclusive(). Regulators returned from this function
87 * are automatically regulator_put() on driver detach. See regulator_get() for
88 * more information.
89 */
90struct regulator *devm_regulator_get_exclusive(struct device *dev,
91 const char *id)
92{
93 return _devm_regulator_get(dev, id, EXCLUSIVE_GET);
94}
95EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);
96
97/**
98 * devm_regulator_get_optional - Resource managed regulator_get_optional()
99 * @dev: device for regulator "consumer"
100 * @id: Supply name or regulator ID.
101 *
102 * Managed regulator_get_optional(). Regulators returned from this
103 * function are automatically regulator_put() on driver detach. See
104 * regulator_get_optional() for more information.
105 */
106struct regulator *devm_regulator_get_optional(struct device *dev,
107 const char *id)
108{
109 return _devm_regulator_get(dev, id, OPTIONAL_GET);
110}
111EXPORT_SYMBOL_GPL(devm_regulator_get_optional);
112
113static int devm_regulator_match(struct device *dev, void *res, void *data)
114{
115 struct regulator **r = res;
116 if (!r || !*r) {
117 WARN_ON(!r || !*r);
118 return 0;
119 }
120 return *r == data;
121}
122
123/**
124 * devm_regulator_put - Resource managed regulator_put()
125 * @regulator: regulator to free
126 *
127 * Deallocate a regulator allocated with devm_regulator_get(). Normally
128 * this function will not need to be called and the resource management
129 * code will ensure that the resource is freed.
130 */
131void devm_regulator_put(struct regulator *regulator)
132{
133 int rc;
134
135 rc = devres_release(regulator->dev, devm_regulator_release,
136 devm_regulator_match, regulator);
137 if (rc != 0)
138 WARN_ON(rc);
139}
140EXPORT_SYMBOL_GPL(devm_regulator_put);
141
142/**
143 * devm_regulator_bulk_get - managed get multiple regulator consumers
144 *
145 * @dev: Device to supply
146 * @num_consumers: Number of consumers to register
147 * @consumers: Configuration of consumers; clients are stored here.
148 *
149 * @return 0 on success, an errno on failure.
150 *
151 * This helper function allows drivers to get several regulator
152 * consumers in one operation with management, the regulators will
153 * automatically be freed when the device is unbound. If any of the
154 * regulators cannot be acquired then any regulators that were
155 * allocated will be freed before returning to the caller.
156 */
157int devm_regulator_bulk_get(struct device *dev, int num_consumers,
158 struct regulator_bulk_data *consumers)
159{
160 int i;
161 int ret;
162
163 for (i = 0; i < num_consumers; i++)
164 consumers[i].consumer = NULL;
165
166 for (i = 0; i < num_consumers; i++) {
167 consumers[i].consumer = devm_regulator_get(dev,
168 consumers[i].supply);
169 if (IS_ERR(consumers[i].consumer)) {
170 ret = PTR_ERR(consumers[i].consumer);
171 dev_err(dev, "Failed to get supply '%s': %d\n",
172 consumers[i].supply, ret);
173 consumers[i].consumer = NULL;
174 goto err;
175 }
176 }
177
178 return 0;
179
180err:
181 for (i = 0; i < num_consumers && consumers[i].consumer; i++)
182 devm_regulator_put(consumers[i].consumer);
183
184 return ret;
185}
186EXPORT_SYMBOL_GPL(devm_regulator_bulk_get);
187
188static void devm_rdev_release(struct device *dev, void *res)
189{
190 regulator_unregister(*(struct regulator_dev **)res);
191}
192
193/**
194 * devm_regulator_register - Resource managed regulator_register()
195 * @regulator_desc: regulator to register
196 * @config: runtime configuration for regulator
197 *
198 * Called by regulator drivers to register a regulator. Returns a
199 * valid pointer to struct regulator_dev on success or an ERR_PTR() on
200 * error. The regulator will automatically be released when the device
201 * is unbound.
202 */
203struct regulator_dev *devm_regulator_register(struct device *dev,
204 const struct regulator_desc *regulator_desc,
205 const struct regulator_config *config)
206{
207 struct regulator_dev **ptr, *rdev;
208
209 ptr = devres_alloc(devm_rdev_release, sizeof(*ptr),
210 GFP_KERNEL);
211 if (!ptr)
212 return ERR_PTR(-ENOMEM);
213
214 rdev = regulator_register(regulator_desc, config);
215 if (!IS_ERR(rdev)) {
216 *ptr = rdev;
217 devres_add(dev, ptr);
218 } else {
219 devres_free(ptr);
220 }
221
222 return rdev;
223}
224EXPORT_SYMBOL_GPL(devm_regulator_register);
225
226static int devm_rdev_match(struct device *dev, void *res, void *data)
227{
228 struct regulator_dev **r = res;
229 if (!r || !*r) {
230 WARN_ON(!r || !*r);
231 return 0;
232 }
233 return *r == data;
234}
235
236/**
237 * devm_regulator_unregister - Resource managed regulator_unregister()
238 * @regulator: regulator to free
239 *
240 * Unregister a regulator registered with devm_regulator_register().
241 * Normally this function will not need to be called and the resource
242 * management code will ensure that the resource is freed.
243 */
244void devm_regulator_unregister(struct device *dev, struct regulator_dev *rdev)
245{
246 int rc;
247
248 rc = devres_release(dev, devm_rdev_release, devm_rdev_match, rdev);
249 if (rc != 0)
250 WARN_ON(rc);
251}
252EXPORT_SYMBOL_GPL(devm_regulator_unregister);
253
254struct regulator_supply_alias_match {
255 struct device *dev;
256 const char *id;
257};
258
259static int devm_regulator_match_supply_alias(struct device *dev, void *res,
260 void *data)
261{
262 struct regulator_supply_alias_match *match = res;
263 struct regulator_supply_alias_match *target = data;
264
265 return match->dev == target->dev && strcmp(match->id, target->id) == 0;
266}
267
268static void devm_regulator_destroy_supply_alias(struct device *dev, void *res)
269{
270 struct regulator_supply_alias_match *match = res;
271
272 regulator_unregister_supply_alias(match->dev, match->id);
273}
274
275/**
276 * devm_regulator_register_supply_alias - Resource managed
277 * regulator_register_supply_alias()
278 *
279 * @dev: device that will be given as the regulator "consumer"
280 * @id: Supply name or regulator ID
281 * @alias_dev: device that should be used to lookup the supply
282 * @alias_id: Supply name or regulator ID that should be used to lookup the
283 * supply
284 *
285 * The supply alias will automatically be unregistered when the source
286 * device is unbound.
287 */
288int devm_regulator_register_supply_alias(struct device *dev, const char *id,
289 struct device *alias_dev,
290 const char *alias_id)
291{
292 struct regulator_supply_alias_match *match;
293 int ret;
294
295 match = devres_alloc(devm_regulator_destroy_supply_alias,
296 sizeof(struct regulator_supply_alias_match),
297 GFP_KERNEL);
298 if (!match)
299 return -ENOMEM;
300
301 match->dev = dev;
302 match->id = id;
303
304 ret = regulator_register_supply_alias(dev, id, alias_dev, alias_id);
305 if (ret < 0) {
306 devres_free(match);
307 return ret;
308 }
309
310 devres_add(dev, match);
311
312 return 0;
313}
314EXPORT_SYMBOL_GPL(devm_regulator_register_supply_alias);
315
316/**
317 * devm_regulator_unregister_supply_alias - Resource managed
318 * regulator_unregister_supply_alias()
319 *
320 * @dev: device that will be given as the regulator "consumer"
321 * @id: Supply name or regulator ID
322 *
323 * Unregister an alias registered with
324 * devm_regulator_register_supply_alias(). Normally this function
325 * will not need to be called and the resource management code
326 * will ensure that the resource is freed.
327 */
328void devm_regulator_unregister_supply_alias(struct device *dev, const char *id)
329{
330 struct regulator_supply_alias_match match;
331 int rc;
332
333 match.dev = dev;
334 match.id = id;
335
336 rc = devres_release(dev, devm_regulator_destroy_supply_alias,
337 devm_regulator_match_supply_alias, &match);
338 if (rc != 0)
339 WARN_ON(rc);
340}
341EXPORT_SYMBOL_GPL(devm_regulator_unregister_supply_alias);
342
343/**
344 * devm_regulator_bulk_register_supply_alias - Managed register
345 * multiple aliases
346 *
347 * @dev: device that will be given as the regulator "consumer"
348 * @id: List of supply names or regulator IDs
349 * @alias_dev: device that should be used to lookup the supply
350 * @alias_id: List of supply names or regulator IDs that should be used to
351 * lookup the supply
352 * @num_id: Number of aliases to register
353 *
354 * @return 0 on success, an errno on failure.
355 *
356 * This helper function allows drivers to register several supply
357 * aliases in one operation, the aliases will be automatically
358 * unregisters when the source device is unbound. If any of the
359 * aliases cannot be registered any aliases that were registered
360 * will be removed before returning to the caller.
361 */
362int devm_regulator_bulk_register_supply_alias(struct device *dev,
363 const char **id,
364 struct device *alias_dev,
365 const char **alias_id,
366 int num_id)
367{
368 int i;
369 int ret;
370
371 for (i = 0; i < num_id; ++i) {
372 ret = devm_regulator_register_supply_alias(dev, id[i],
373 alias_dev,
374 alias_id[i]);
375 if (ret < 0)
376 goto err;
377 }
378
379 return 0;
380
381err:
382 dev_err(dev,
383 "Failed to create supply alias %s,%s -> %s,%s\n",
384 id[i], dev_name(dev), alias_id[i], dev_name(alias_dev));
385
386 while (--i >= 0)
387 devm_regulator_unregister_supply_alias(dev, id[i]);
388
389 return ret;
390}
391EXPORT_SYMBOL_GPL(devm_regulator_bulk_register_supply_alias);
392
393/**
394 * devm_regulator_bulk_unregister_supply_alias - Managed unregister
395 * multiple aliases
396 *
397 * @dev: device that will be given as the regulator "consumer"
398 * @id: List of supply names or regulator IDs
399 * @num_id: Number of aliases to unregister
400 *
401 * Unregister aliases registered with
402 * devm_regulator_bulk_register_supply_alias(). Normally this function
403 * will not need to be called and the resource management code
404 * will ensure that the resource is freed.
405 */
406void devm_regulator_bulk_unregister_supply_alias(struct device *dev,
407 const char **id,
408 int num_id)
409{
410 int i;
411
412 for (i = 0; i < num_id; ++i)
413 devm_regulator_unregister_supply_alias(dev, id[i]);
414}
415EXPORT_SYMBOL_GPL(devm_regulator_bulk_unregister_supply_alias);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * devres.c -- Voltage/Current Regulator framework devres implementation.
4 *
5 * Copyright 2013 Linaro Ltd
6 */
7
8#include <linux/kernel.h>
9#include <linux/err.h>
10#include <linux/regmap.h>
11#include <linux/regulator/consumer.h>
12#include <linux/regulator/driver.h>
13#include <linux/module.h>
14
15#include "internal.h"
16
17static void devm_regulator_release(struct device *dev, void *res)
18{
19 regulator_put(*(struct regulator **)res);
20}
21
22static struct regulator *_devm_regulator_get(struct device *dev, const char *id,
23 int get_type)
24{
25 struct regulator **ptr, *regulator;
26
27 ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
28 if (!ptr)
29 return ERR_PTR(-ENOMEM);
30
31 regulator = _regulator_get(dev, id, get_type);
32 if (!IS_ERR(regulator)) {
33 *ptr = regulator;
34 devres_add(dev, ptr);
35 } else {
36 devres_free(ptr);
37 }
38
39 return regulator;
40}
41
42/**
43 * devm_regulator_get - Resource managed regulator_get()
44 * @dev: device to supply
45 * @id: supply name or regulator ID.
46 *
47 * Managed regulator_get(). Regulators returned from this function are
48 * automatically regulator_put() on driver detach. See regulator_get() for more
49 * information.
50 */
51struct regulator *devm_regulator_get(struct device *dev, const char *id)
52{
53 return _devm_regulator_get(dev, id, NORMAL_GET);
54}
55EXPORT_SYMBOL_GPL(devm_regulator_get);
56
57/**
58 * devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
59 * @dev: device to supply
60 * @id: supply name or regulator ID.
61 *
62 * Managed regulator_get_exclusive(). Regulators returned from this function
63 * are automatically regulator_put() on driver detach. See regulator_get() for
64 * more information.
65 */
66struct regulator *devm_regulator_get_exclusive(struct device *dev,
67 const char *id)
68{
69 return _devm_regulator_get(dev, id, EXCLUSIVE_GET);
70}
71EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);
72
73static void regulator_action_disable(void *d)
74{
75 struct regulator *r = (struct regulator *)d;
76
77 regulator_disable(r);
78}
79
80static int _devm_regulator_get_enable(struct device *dev, const char *id,
81 int get_type)
82{
83 struct regulator *r;
84 int ret;
85
86 r = _devm_regulator_get(dev, id, get_type);
87 if (IS_ERR(r))
88 return PTR_ERR(r);
89
90 ret = regulator_enable(r);
91 if (!ret)
92 ret = devm_add_action_or_reset(dev, ®ulator_action_disable, r);
93
94 if (ret)
95 devm_regulator_put(r);
96
97 return ret;
98}
99
100/**
101 * devm_regulator_get_enable_optional - Resource managed regulator get and enable
102 * @dev: device to supply
103 * @id: supply name or regulator ID.
104 *
105 * Get and enable regulator for duration of the device life-time.
106 * regulator_disable() and regulator_put() are automatically called on driver
107 * detach. See regulator_get_optional() and regulator_enable() for more
108 * information.
109 */
110int devm_regulator_get_enable_optional(struct device *dev, const char *id)
111{
112 return _devm_regulator_get_enable(dev, id, OPTIONAL_GET);
113}
114EXPORT_SYMBOL_GPL(devm_regulator_get_enable_optional);
115
116/**
117 * devm_regulator_get_enable - Resource managed regulator get and enable
118 * @dev: device to supply
119 * @id: supply name or regulator ID.
120 *
121 * Get and enable regulator for duration of the device life-time.
122 * regulator_disable() and regulator_put() are automatically called on driver
123 * detach. See regulator_get() and regulator_enable() for more
124 * information.
125 */
126int devm_regulator_get_enable(struct device *dev, const char *id)
127{
128 return _devm_regulator_get_enable(dev, id, NORMAL_GET);
129}
130EXPORT_SYMBOL_GPL(devm_regulator_get_enable);
131
132/**
133 * devm_regulator_get_optional - Resource managed regulator_get_optional()
134 * @dev: device to supply
135 * @id: supply name or regulator ID.
136 *
137 * Managed regulator_get_optional(). Regulators returned from this
138 * function are automatically regulator_put() on driver detach. See
139 * regulator_get_optional() for more information.
140 */
141struct regulator *devm_regulator_get_optional(struct device *dev,
142 const char *id)
143{
144 return _devm_regulator_get(dev, id, OPTIONAL_GET);
145}
146EXPORT_SYMBOL_GPL(devm_regulator_get_optional);
147
148static int devm_regulator_match(struct device *dev, void *res, void *data)
149{
150 struct regulator **r = res;
151 if (!r || !*r) {
152 WARN_ON(!r || !*r);
153 return 0;
154 }
155 return *r == data;
156}
157
158/**
159 * devm_regulator_put - Resource managed regulator_put()
160 * @regulator: regulator to free
161 *
162 * Deallocate a regulator allocated with devm_regulator_get(). Normally
163 * this function will not need to be called and the resource management
164 * code will ensure that the resource is freed.
165 */
166void devm_regulator_put(struct regulator *regulator)
167{
168 int rc;
169
170 rc = devres_release(regulator->dev, devm_regulator_release,
171 devm_regulator_match, regulator);
172 if (rc != 0)
173 WARN_ON(rc);
174}
175EXPORT_SYMBOL_GPL(devm_regulator_put);
176
177struct regulator_bulk_devres {
178 struct regulator_bulk_data *consumers;
179 int num_consumers;
180};
181
182static void devm_regulator_bulk_release(struct device *dev, void *res)
183{
184 struct regulator_bulk_devres *devres = res;
185
186 regulator_bulk_free(devres->num_consumers, devres->consumers);
187}
188
189static int _devm_regulator_bulk_get(struct device *dev, int num_consumers,
190 struct regulator_bulk_data *consumers,
191 enum regulator_get_type get_type)
192{
193 struct regulator_bulk_devres *devres;
194 int ret;
195
196 devres = devres_alloc(devm_regulator_bulk_release,
197 sizeof(*devres), GFP_KERNEL);
198 if (!devres)
199 return -ENOMEM;
200
201 ret = _regulator_bulk_get(dev, num_consumers, consumers, get_type);
202 if (!ret) {
203 devres->consumers = consumers;
204 devres->num_consumers = num_consumers;
205 devres_add(dev, devres);
206 } else {
207 devres_free(devres);
208 }
209
210 return ret;
211}
212
213/**
214 * devm_regulator_bulk_get - managed get multiple regulator consumers
215 *
216 * @dev: device to supply
217 * @num_consumers: number of consumers to register
218 * @consumers: configuration of consumers; clients are stored here.
219 *
220 * @return 0 on success, an errno on failure.
221 *
222 * This helper function allows drivers to get several regulator
223 * consumers in one operation with management, the regulators will
224 * automatically be freed when the device is unbound. If any of the
225 * regulators cannot be acquired then any regulators that were
226 * allocated will be freed before returning to the caller.
227 */
228int devm_regulator_bulk_get(struct device *dev, int num_consumers,
229 struct regulator_bulk_data *consumers)
230{
231 return _devm_regulator_bulk_get(dev, num_consumers, consumers, NORMAL_GET);
232}
233EXPORT_SYMBOL_GPL(devm_regulator_bulk_get);
234
235/**
236 * devm_regulator_bulk_get_exclusive - managed exclusive get of multiple
237 * regulator consumers
238 *
239 * @dev: device to supply
240 * @num_consumers: number of consumers to register
241 * @consumers: configuration of consumers; clients are stored here.
242 *
243 * @return 0 on success, an errno on failure.
244 *
245 * This helper function allows drivers to exclusively get several
246 * regulator consumers in one operation with management, the regulators
247 * will automatically be freed when the device is unbound. If any of
248 * the regulators cannot be acquired then any regulators that were
249 * allocated will be freed before returning to the caller.
250 */
251int devm_regulator_bulk_get_exclusive(struct device *dev, int num_consumers,
252 struct regulator_bulk_data *consumers)
253{
254 return _devm_regulator_bulk_get(dev, num_consumers, consumers, EXCLUSIVE_GET);
255}
256EXPORT_SYMBOL_GPL(devm_regulator_bulk_get_exclusive);
257
258/**
259 * devm_regulator_bulk_get_const - devm_regulator_bulk_get() w/ const data
260 *
261 * @dev: device to supply
262 * @num_consumers: number of consumers to register
263 * @in_consumers: const configuration of consumers
264 * @out_consumers: in_consumers is copied here and this is passed to
265 * devm_regulator_bulk_get().
266 *
267 * This is a convenience function to allow bulk regulator configuration
268 * to be stored "static const" in files.
269 *
270 * Return: 0 on success, an errno on failure.
271 */
272int devm_regulator_bulk_get_const(struct device *dev, int num_consumers,
273 const struct regulator_bulk_data *in_consumers,
274 struct regulator_bulk_data **out_consumers)
275{
276 *out_consumers = devm_kmemdup(dev, in_consumers,
277 num_consumers * sizeof(*in_consumers),
278 GFP_KERNEL);
279 if (*out_consumers == NULL)
280 return -ENOMEM;
281
282 return devm_regulator_bulk_get(dev, num_consumers, *out_consumers);
283}
284EXPORT_SYMBOL_GPL(devm_regulator_bulk_get_const);
285
286static int devm_regulator_bulk_match(struct device *dev, void *res,
287 void *data)
288{
289 struct regulator_bulk_devres *match = res;
290 struct regulator_bulk_data *target = data;
291
292 /*
293 * We check the put uses same consumer list as the get did.
294 * We _could_ scan all entries in consumer array and check the
295 * regulators match but ATM I don't see the need. We can change this
296 * later if needed.
297 */
298 return match->consumers == target;
299}
300
301/**
302 * devm_regulator_bulk_put - Resource managed regulator_bulk_put()
303 * @consumers: consumers to free
304 *
305 * Deallocate regulators allocated with devm_regulator_bulk_get(). Normally
306 * this function will not need to be called and the resource management
307 * code will ensure that the resource is freed.
308 */
309void devm_regulator_bulk_put(struct regulator_bulk_data *consumers)
310{
311 int rc;
312 struct regulator *regulator = consumers[0].consumer;
313
314 rc = devres_release(regulator->dev, devm_regulator_bulk_release,
315 devm_regulator_bulk_match, consumers);
316 if (rc != 0)
317 WARN_ON(rc);
318}
319EXPORT_SYMBOL_GPL(devm_regulator_bulk_put);
320
321static void devm_regulator_bulk_disable(void *res)
322{
323 struct regulator_bulk_devres *devres = res;
324 int i;
325
326 for (i = 0; i < devres->num_consumers; i++)
327 regulator_disable(devres->consumers[i].consumer);
328}
329
330/**
331 * devm_regulator_bulk_get_enable - managed get'n enable multiple regulators
332 *
333 * @dev: device to supply
334 * @num_consumers: number of consumers to register
335 * @id: list of supply names or regulator IDs
336 *
337 * @return 0 on success, an errno on failure.
338 *
339 * This helper function allows drivers to get several regulator
340 * consumers in one operation with management, the regulators will
341 * automatically be freed when the device is unbound. If any of the
342 * regulators cannot be acquired then any regulators that were
343 * allocated will be freed before returning to the caller.
344 */
345int devm_regulator_bulk_get_enable(struct device *dev, int num_consumers,
346 const char * const *id)
347{
348 struct regulator_bulk_devres *devres;
349 struct regulator_bulk_data *consumers;
350 int i, ret;
351
352 devres = devm_kmalloc(dev, sizeof(*devres), GFP_KERNEL);
353 if (!devres)
354 return -ENOMEM;
355
356 devres->consumers = devm_kcalloc(dev, num_consumers, sizeof(*consumers),
357 GFP_KERNEL);
358 consumers = devres->consumers;
359 if (!consumers)
360 return -ENOMEM;
361
362 devres->num_consumers = num_consumers;
363
364 for (i = 0; i < num_consumers; i++)
365 consumers[i].supply = id[i];
366
367 ret = devm_regulator_bulk_get(dev, num_consumers, consumers);
368 if (ret)
369 return ret;
370
371 for (i = 0; i < num_consumers; i++) {
372 ret = regulator_enable(consumers[i].consumer);
373 if (ret)
374 goto unwind;
375 }
376
377 ret = devm_add_action(dev, devm_regulator_bulk_disable, devres);
378 if (!ret)
379 return 0;
380
381unwind:
382 while (--i >= 0)
383 regulator_disable(consumers[i].consumer);
384
385 devm_regulator_bulk_put(consumers);
386
387 return ret;
388}
389EXPORT_SYMBOL_GPL(devm_regulator_bulk_get_enable);
390
391static void devm_rdev_release(struct device *dev, void *res)
392{
393 regulator_unregister(*(struct regulator_dev **)res);
394}
395
396/**
397 * devm_regulator_register - Resource managed regulator_register()
398 * @dev: device to supply
399 * @regulator_desc: regulator to register
400 * @config: runtime configuration for regulator
401 *
402 * Called by regulator drivers to register a regulator. Returns a
403 * valid pointer to struct regulator_dev on success or an ERR_PTR() on
404 * error. The regulator will automatically be released when the device
405 * is unbound.
406 */
407struct regulator_dev *devm_regulator_register(struct device *dev,
408 const struct regulator_desc *regulator_desc,
409 const struct regulator_config *config)
410{
411 struct regulator_dev **ptr, *rdev;
412
413 ptr = devres_alloc(devm_rdev_release, sizeof(*ptr),
414 GFP_KERNEL);
415 if (!ptr)
416 return ERR_PTR(-ENOMEM);
417
418 rdev = regulator_register(dev, regulator_desc, config);
419 if (!IS_ERR(rdev)) {
420 *ptr = rdev;
421 devres_add(dev, ptr);
422 } else {
423 devres_free(ptr);
424 }
425
426 return rdev;
427}
428EXPORT_SYMBOL_GPL(devm_regulator_register);
429
430struct regulator_supply_alias_match {
431 struct device *dev;
432 const char *id;
433};
434
435static int devm_regulator_match_supply_alias(struct device *dev, void *res,
436 void *data)
437{
438 struct regulator_supply_alias_match *match = res;
439 struct regulator_supply_alias_match *target = data;
440
441 return match->dev == target->dev && strcmp(match->id, target->id) == 0;
442}
443
444static void devm_regulator_destroy_supply_alias(struct device *dev, void *res)
445{
446 struct regulator_supply_alias_match *match = res;
447
448 regulator_unregister_supply_alias(match->dev, match->id);
449}
450
451/**
452 * devm_regulator_register_supply_alias - Resource managed
453 * regulator_register_supply_alias()
454 *
455 * @dev: device to supply
456 * @id: supply name or regulator ID
457 * @alias_dev: device that should be used to lookup the supply
458 * @alias_id: supply name or regulator ID that should be used to lookup the
459 * supply
460 *
461 * The supply alias will automatically be unregistered when the source
462 * device is unbound.
463 */
464int devm_regulator_register_supply_alias(struct device *dev, const char *id,
465 struct device *alias_dev,
466 const char *alias_id)
467{
468 struct regulator_supply_alias_match *match;
469 int ret;
470
471 match = devres_alloc(devm_regulator_destroy_supply_alias,
472 sizeof(struct regulator_supply_alias_match),
473 GFP_KERNEL);
474 if (!match)
475 return -ENOMEM;
476
477 match->dev = dev;
478 match->id = id;
479
480 ret = regulator_register_supply_alias(dev, id, alias_dev, alias_id);
481 if (ret < 0) {
482 devres_free(match);
483 return ret;
484 }
485
486 devres_add(dev, match);
487
488 return 0;
489}
490EXPORT_SYMBOL_GPL(devm_regulator_register_supply_alias);
491
492static void devm_regulator_unregister_supply_alias(struct device *dev,
493 const char *id)
494{
495 struct regulator_supply_alias_match match;
496 int rc;
497
498 match.dev = dev;
499 match.id = id;
500
501 rc = devres_release(dev, devm_regulator_destroy_supply_alias,
502 devm_regulator_match_supply_alias, &match);
503 if (rc != 0)
504 WARN_ON(rc);
505}
506
507/**
508 * devm_regulator_bulk_register_supply_alias - Managed register
509 * multiple aliases
510 *
511 * @dev: device to supply
512 * @id: list of supply names or regulator IDs
513 * @alias_dev: device that should be used to lookup the supply
514 * @alias_id: list of supply names or regulator IDs that should be used to
515 * lookup the supply
516 * @num_id: number of aliases to register
517 *
518 * @return 0 on success, an errno on failure.
519 *
520 * This helper function allows drivers to register several supply
521 * aliases in one operation, the aliases will be automatically
522 * unregisters when the source device is unbound. If any of the
523 * aliases cannot be registered any aliases that were registered
524 * will be removed before returning to the caller.
525 */
526int devm_regulator_bulk_register_supply_alias(struct device *dev,
527 const char *const *id,
528 struct device *alias_dev,
529 const char *const *alias_id,
530 int num_id)
531{
532 int i;
533 int ret;
534
535 for (i = 0; i < num_id; ++i) {
536 ret = devm_regulator_register_supply_alias(dev, id[i],
537 alias_dev,
538 alias_id[i]);
539 if (ret < 0)
540 goto err;
541 }
542
543 return 0;
544
545err:
546 dev_err(dev,
547 "Failed to create supply alias %s,%s -> %s,%s\n",
548 id[i], dev_name(dev), alias_id[i], dev_name(alias_dev));
549
550 while (--i >= 0)
551 devm_regulator_unregister_supply_alias(dev, id[i]);
552
553 return ret;
554}
555EXPORT_SYMBOL_GPL(devm_regulator_bulk_register_supply_alias);
556
557struct regulator_notifier_match {
558 struct regulator *regulator;
559 struct notifier_block *nb;
560};
561
562static int devm_regulator_match_notifier(struct device *dev, void *res,
563 void *data)
564{
565 struct regulator_notifier_match *match = res;
566 struct regulator_notifier_match *target = data;
567
568 return match->regulator == target->regulator && match->nb == target->nb;
569}
570
571static void devm_regulator_destroy_notifier(struct device *dev, void *res)
572{
573 struct regulator_notifier_match *match = res;
574
575 regulator_unregister_notifier(match->regulator, match->nb);
576}
577
578/**
579 * devm_regulator_register_notifier - Resource managed
580 * regulator_register_notifier
581 *
582 * @regulator: regulator source
583 * @nb: notifier block
584 *
585 * The notifier will be registers under the consumer device and be
586 * automatically be unregistered when the source device is unbound.
587 */
588int devm_regulator_register_notifier(struct regulator *regulator,
589 struct notifier_block *nb)
590{
591 struct regulator_notifier_match *match;
592 int ret;
593
594 match = devres_alloc(devm_regulator_destroy_notifier,
595 sizeof(struct regulator_notifier_match),
596 GFP_KERNEL);
597 if (!match)
598 return -ENOMEM;
599
600 match->regulator = regulator;
601 match->nb = nb;
602
603 ret = regulator_register_notifier(regulator, nb);
604 if (ret < 0) {
605 devres_free(match);
606 return ret;
607 }
608
609 devres_add(regulator->dev, match);
610
611 return 0;
612}
613EXPORT_SYMBOL_GPL(devm_regulator_register_notifier);
614
615/**
616 * devm_regulator_unregister_notifier - Resource managed
617 * regulator_unregister_notifier()
618 *
619 * @regulator: regulator source
620 * @nb: notifier block
621 *
622 * Unregister a notifier registered with devm_regulator_register_notifier().
623 * Normally this function will not need to be called and the resource
624 * management code will ensure that the resource is freed.
625 */
626void devm_regulator_unregister_notifier(struct regulator *regulator,
627 struct notifier_block *nb)
628{
629 struct regulator_notifier_match match;
630 int rc;
631
632 match.regulator = regulator;
633 match.nb = nb;
634
635 rc = devres_release(regulator->dev, devm_regulator_destroy_notifier,
636 devm_regulator_match_notifier, &match);
637 if (rc != 0)
638 WARN_ON(rc);
639}
640EXPORT_SYMBOL_GPL(devm_regulator_unregister_notifier);
641
642static void regulator_irq_helper_drop(void *res)
643{
644 regulator_irq_helper_cancel(&res);
645}
646
647/**
648 * devm_regulator_irq_helper - resource managed registration of IRQ based
649 * regulator event/error notifier
650 *
651 * @dev: device to which lifetime the helper's lifetime is
652 * bound.
653 * @d: IRQ helper descriptor.
654 * @irq: IRQ used to inform events/errors to be notified.
655 * @irq_flags: Extra IRQ flags to be OR'ed with the default
656 * IRQF_ONESHOT when requesting the (threaded) irq.
657 * @common_errs: Errors which can be flagged by this IRQ for all rdevs.
658 * When IRQ is re-enabled these errors will be cleared
659 * from all associated regulators
660 * @per_rdev_errs: Optional error flag array describing errors specific
661 * for only some of the regulators. These errors will be
662 * or'ed with common errors. If this is given the array
663 * should contain rdev_amount flags. Can be set to NULL
664 * if there is no regulator specific error flags for this
665 * IRQ.
666 * @rdev: Array of pointers to regulators associated with this
667 * IRQ.
668 * @rdev_amount: Amount of regulators associated with this IRQ.
669 *
670 * Return: handle to irq_helper or an ERR_PTR() encoded error code.
671 */
672void *devm_regulator_irq_helper(struct device *dev,
673 const struct regulator_irq_desc *d, int irq,
674 int irq_flags, int common_errs,
675 int *per_rdev_errs,
676 struct regulator_dev **rdev, int rdev_amount)
677{
678 void *ptr;
679 int ret;
680
681 ptr = regulator_irq_helper(dev, d, irq, irq_flags, common_errs,
682 per_rdev_errs, rdev, rdev_amount);
683 if (IS_ERR(ptr))
684 return ptr;
685
686 ret = devm_add_action_or_reset(dev, regulator_irq_helper_drop, ptr);
687 if (ret)
688 return ERR_PTR(ret);
689
690 return ptr;
691}
692EXPORT_SYMBOL_GPL(devm_regulator_irq_helper);