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16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/debugfs.h>
19#include <linux/device.h>
20#include <linux/slab.h>
21#include <linux/async.h>
22#include <linux/err.h>
23#include <linux/mutex.h>
24#include <linux/suspend.h>
25#include <linux/delay.h>
26#include <linux/gpio.h>
27#include <linux/gpio/consumer.h>
28#include <linux/of.h>
29#include <linux/regmap.h>
30#include <linux/regulator/of_regulator.h>
31#include <linux/regulator/consumer.h>
32#include <linux/regulator/driver.h>
33#include <linux/regulator/machine.h>
34#include <linux/module.h>
35
36#define CREATE_TRACE_POINTS
37#include <trace/events/regulator.h>
38
39#include "dummy.h"
40#include "internal.h"
41
42#define rdev_crit(rdev, fmt, ...) \
43 pr_crit("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
44#define rdev_err(rdev, fmt, ...) \
45 pr_err("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
46#define rdev_warn(rdev, fmt, ...) \
47 pr_warn("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
48#define rdev_info(rdev, fmt, ...) \
49 pr_info("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
50#define rdev_dbg(rdev, fmt, ...) \
51 pr_debug("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
52
53static DEFINE_MUTEX(regulator_list_mutex);
54static LIST_HEAD(regulator_map_list);
55static LIST_HEAD(regulator_ena_gpio_list);
56static LIST_HEAD(regulator_supply_alias_list);
57static bool has_full_constraints;
58
59static struct dentry *debugfs_root;
60
61static struct class regulator_class;
62
63
64
65
66
67
68struct regulator_map {
69 struct list_head list;
70 const char *dev_name;
71 const char *supply;
72 struct regulator_dev *regulator;
73};
74
75
76
77
78
79
80struct regulator_enable_gpio {
81 struct list_head list;
82 struct gpio_desc *gpiod;
83 u32 enable_count;
84 u32 request_count;
85 unsigned int ena_gpio_invert:1;
86};
87
88
89
90
91
92
93struct regulator_supply_alias {
94 struct list_head list;
95 struct device *src_dev;
96 const char *src_supply;
97 struct device *alias_dev;
98 const char *alias_supply;
99};
100
101static int _regulator_is_enabled(struct regulator_dev *rdev);
102static int _regulator_disable(struct regulator_dev *rdev);
103static int _regulator_get_voltage(struct regulator_dev *rdev);
104static int _regulator_get_current_limit(struct regulator_dev *rdev);
105static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
106static int _notifier_call_chain(struct regulator_dev *rdev,
107 unsigned long event, void *data);
108static int _regulator_do_set_voltage(struct regulator_dev *rdev,
109 int min_uV, int max_uV);
110static struct regulator *create_regulator(struct regulator_dev *rdev,
111 struct device *dev,
112 const char *supply_name);
113static void _regulator_put(struct regulator *regulator);
114
115static struct regulator_dev *dev_to_rdev(struct device *dev)
116{
117 return container_of(dev, struct regulator_dev, dev);
118}
119
120static const char *rdev_get_name(struct regulator_dev *rdev)
121{
122 if (rdev->constraints && rdev->constraints->name)
123 return rdev->constraints->name;
124 else if (rdev->desc->name)
125 return rdev->desc->name;
126 else
127 return "";
128}
129
130static bool have_full_constraints(void)
131{
132 return has_full_constraints || of_have_populated_dt();
133}
134
135static inline struct regulator_dev *rdev_get_supply(struct regulator_dev *rdev)
136{
137 if (rdev && rdev->supply)
138 return rdev->supply->rdev;
139
140 return NULL;
141}
142
143
144
145
146
147static void regulator_lock_supply(struct regulator_dev *rdev)
148{
149 int i;
150
151 for (i = 0; rdev; rdev = rdev_get_supply(rdev), i++)
152 mutex_lock_nested(&rdev->mutex, i);
153}
154
155
156
157
158
159static void regulator_unlock_supply(struct regulator_dev *rdev)
160{
161 struct regulator *supply;
162
163 while (1) {
164 mutex_unlock(&rdev->mutex);
165 supply = rdev->supply;
166
167 if (!rdev->supply)
168 return;
169
170 rdev = supply->rdev;
171 }
172}
173
174
175
176
177
178
179
180
181
182
183static struct device_node *of_get_regulator(struct device *dev, const char *supply)
184{
185 struct device_node *regnode = NULL;
186 char prop_name[32];
187
188 dev_dbg(dev, "Looking up %s-supply from device tree\n", supply);
189
190 snprintf(prop_name, 32, "%s-supply", supply);
191 regnode = of_parse_phandle(dev->of_node, prop_name, 0);
192
193 if (!regnode) {
194 dev_dbg(dev, "Looking up %s property in node %s failed",
195 prop_name, dev->of_node->full_name);
196 return NULL;
197 }
198 return regnode;
199}
200
201static int _regulator_can_change_status(struct regulator_dev *rdev)
202{
203 if (!rdev->constraints)
204 return 0;
205
206 if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS)
207 return 1;
208 else
209 return 0;
210}
211
212
213static int regulator_check_voltage(struct regulator_dev *rdev,
214 int *min_uV, int *max_uV)
215{
216 BUG_ON(*min_uV > *max_uV);
217
218 if (!rdev->constraints) {
219 rdev_err(rdev, "no constraints\n");
220 return -ENODEV;
221 }
222 if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
223 rdev_err(rdev, "voltage operation not allowed\n");
224 return -EPERM;
225 }
226
227 if (*max_uV > rdev->constraints->max_uV)
228 *max_uV = rdev->constraints->max_uV;
229 if (*min_uV < rdev->constraints->min_uV)
230 *min_uV = rdev->constraints->min_uV;
231
232 if (*min_uV > *max_uV) {
233 rdev_err(rdev, "unsupportable voltage range: %d-%duV\n",
234 *min_uV, *max_uV);
235 return -EINVAL;
236 }
237
238 return 0;
239}
240
241
242
243
244static int regulator_check_consumers(struct regulator_dev *rdev,
245 int *min_uV, int *max_uV)
246{
247 struct regulator *regulator;
248
249 list_for_each_entry(regulator, &rdev->consumer_list, list) {
250
251
252
253
254 if (!regulator->min_uV && !regulator->max_uV)
255 continue;
256
257 if (*max_uV > regulator->max_uV)
258 *max_uV = regulator->max_uV;
259 if (*min_uV < regulator->min_uV)
260 *min_uV = regulator->min_uV;
261 }
262
263 if (*min_uV > *max_uV) {
264 rdev_err(rdev, "Restricting voltage, %u-%uuV\n",
265 *min_uV, *max_uV);
266 return -EINVAL;
267 }
268
269 return 0;
270}
271
272
273static int regulator_check_current_limit(struct regulator_dev *rdev,
274 int *min_uA, int *max_uA)
275{
276 BUG_ON(*min_uA > *max_uA);
277
278 if (!rdev->constraints) {
279 rdev_err(rdev, "no constraints\n");
280 return -ENODEV;
281 }
282 if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) {
283 rdev_err(rdev, "current operation not allowed\n");
284 return -EPERM;
285 }
286
287 if (*max_uA > rdev->constraints->max_uA)
288 *max_uA = rdev->constraints->max_uA;
289 if (*min_uA < rdev->constraints->min_uA)
290 *min_uA = rdev->constraints->min_uA;
291
292 if (*min_uA > *max_uA) {
293 rdev_err(rdev, "unsupportable current range: %d-%duA\n",
294 *min_uA, *max_uA);
295 return -EINVAL;
296 }
297
298 return 0;
299}
300
301
302static int regulator_mode_constrain(struct regulator_dev *rdev, int *mode)
303{
304 switch (*mode) {
305 case REGULATOR_MODE_FAST:
306 case REGULATOR_MODE_NORMAL:
307 case REGULATOR_MODE_IDLE:
308 case REGULATOR_MODE_STANDBY:
309 break;
310 default:
311 rdev_err(rdev, "invalid mode %x specified\n", *mode);
312 return -EINVAL;
313 }
314
315 if (!rdev->constraints) {
316 rdev_err(rdev, "no constraints\n");
317 return -ENODEV;
318 }
319 if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) {
320 rdev_err(rdev, "mode operation not allowed\n");
321 return -EPERM;
322 }
323
324
325
326
327 while (*mode) {
328 if (rdev->constraints->valid_modes_mask & *mode)
329 return 0;
330 *mode /= 2;
331 }
332
333 return -EINVAL;
334}
335
336
337static int regulator_check_drms(struct regulator_dev *rdev)
338{
339 if (!rdev->constraints) {
340 rdev_err(rdev, "no constraints\n");
341 return -ENODEV;
342 }
343 if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) {
344 rdev_dbg(rdev, "drms operation not allowed\n");
345 return -EPERM;
346 }
347 return 0;
348}
349
350static ssize_t regulator_uV_show(struct device *dev,
351 struct device_attribute *attr, char *buf)
352{
353 struct regulator_dev *rdev = dev_get_drvdata(dev);
354 ssize_t ret;
355
356 mutex_lock(&rdev->mutex);
357 ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev));
358 mutex_unlock(&rdev->mutex);
359
360 return ret;
361}
362static DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL);
363
364static ssize_t regulator_uA_show(struct device *dev,
365 struct device_attribute *attr, char *buf)
366{
367 struct regulator_dev *rdev = dev_get_drvdata(dev);
368
369 return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev));
370}
371static DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL);
372
373static ssize_t name_show(struct device *dev, struct device_attribute *attr,
374 char *buf)
375{
376 struct regulator_dev *rdev = dev_get_drvdata(dev);
377
378 return sprintf(buf, "%s\n", rdev_get_name(rdev));
379}
380static DEVICE_ATTR_RO(name);
381
382static ssize_t regulator_print_opmode(char *buf, int mode)
383{
384 switch (mode) {
385 case REGULATOR_MODE_FAST:
386 return sprintf(buf, "fast\n");
387 case REGULATOR_MODE_NORMAL:
388 return sprintf(buf, "normal\n");
389 case REGULATOR_MODE_IDLE:
390 return sprintf(buf, "idle\n");
391 case REGULATOR_MODE_STANDBY:
392 return sprintf(buf, "standby\n");
393 }
394 return sprintf(buf, "unknown\n");
395}
396
397static ssize_t regulator_opmode_show(struct device *dev,
398 struct device_attribute *attr, char *buf)
399{
400 struct regulator_dev *rdev = dev_get_drvdata(dev);
401
402 return regulator_print_opmode(buf, _regulator_get_mode(rdev));
403}
404static DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL);
405
406static ssize_t regulator_print_state(char *buf, int state)
407{
408 if (state > 0)
409 return sprintf(buf, "enabled\n");
410 else if (state == 0)
411 return sprintf(buf, "disabled\n");
412 else
413 return sprintf(buf, "unknown\n");
414}
415
416static ssize_t regulator_state_show(struct device *dev,
417 struct device_attribute *attr, char *buf)
418{
419 struct regulator_dev *rdev = dev_get_drvdata(dev);
420 ssize_t ret;
421
422 mutex_lock(&rdev->mutex);
423 ret = regulator_print_state(buf, _regulator_is_enabled(rdev));
424 mutex_unlock(&rdev->mutex);
425
426 return ret;
427}
428static DEVICE_ATTR(state, 0444, regulator_state_show, NULL);
429
430static ssize_t regulator_status_show(struct device *dev,
431 struct device_attribute *attr, char *buf)
432{
433 struct regulator_dev *rdev = dev_get_drvdata(dev);
434 int status;
435 char *label;
436
437 status = rdev->desc->ops->get_status(rdev);
438 if (status < 0)
439 return status;
440
441 switch (status) {
442 case REGULATOR_STATUS_OFF:
443 label = "off";
444 break;
445 case REGULATOR_STATUS_ON:
446 label = "on";
447 break;
448 case REGULATOR_STATUS_ERROR:
449 label = "error";
450 break;
451 case REGULATOR_STATUS_FAST:
452 label = "fast";
453 break;
454 case REGULATOR_STATUS_NORMAL:
455 label = "normal";
456 break;
457 case REGULATOR_STATUS_IDLE:
458 label = "idle";
459 break;
460 case REGULATOR_STATUS_STANDBY:
461 label = "standby";
462 break;
463 case REGULATOR_STATUS_BYPASS:
464 label = "bypass";
465 break;
466 case REGULATOR_STATUS_UNDEFINED:
467 label = "undefined";
468 break;
469 default:
470 return -ERANGE;
471 }
472
473 return sprintf(buf, "%s\n", label);
474}
475static DEVICE_ATTR(status, 0444, regulator_status_show, NULL);
476
477static ssize_t regulator_min_uA_show(struct device *dev,
478 struct device_attribute *attr, char *buf)
479{
480 struct regulator_dev *rdev = dev_get_drvdata(dev);
481
482 if (!rdev->constraints)
483 return sprintf(buf, "constraint not defined\n");
484
485 return sprintf(buf, "%d\n", rdev->constraints->min_uA);
486}
487static DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL);
488
489static ssize_t regulator_max_uA_show(struct device *dev,
490 struct device_attribute *attr, char *buf)
491{
492 struct regulator_dev *rdev = dev_get_drvdata(dev);
493
494 if (!rdev->constraints)
495 return sprintf(buf, "constraint not defined\n");
496
497 return sprintf(buf, "%d\n", rdev->constraints->max_uA);
498}
499static DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL);
500
501static ssize_t regulator_min_uV_show(struct device *dev,
502 struct device_attribute *attr, char *buf)
503{
504 struct regulator_dev *rdev = dev_get_drvdata(dev);
505
506 if (!rdev->constraints)
507 return sprintf(buf, "constraint not defined\n");
508
509 return sprintf(buf, "%d\n", rdev->constraints->min_uV);
510}
511static DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL);
512
513static ssize_t regulator_max_uV_show(struct device *dev,
514 struct device_attribute *attr, char *buf)
515{
516 struct regulator_dev *rdev = dev_get_drvdata(dev);
517
518 if (!rdev->constraints)
519 return sprintf(buf, "constraint not defined\n");
520
521 return sprintf(buf, "%d\n", rdev->constraints->max_uV);
522}
523static DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL);
524
525static ssize_t regulator_total_uA_show(struct device *dev,
526 struct device_attribute *attr, char *buf)
527{
528 struct regulator_dev *rdev = dev_get_drvdata(dev);
529 struct regulator *regulator;
530 int uA = 0;
531
532 mutex_lock(&rdev->mutex);
533 list_for_each_entry(regulator, &rdev->consumer_list, list)
534 uA += regulator->uA_load;
535 mutex_unlock(&rdev->mutex);
536 return sprintf(buf, "%d\n", uA);
537}
538static DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL);
539
540static ssize_t num_users_show(struct device *dev, struct device_attribute *attr,
541 char *buf)
542{
543 struct regulator_dev *rdev = dev_get_drvdata(dev);
544 return sprintf(buf, "%d\n", rdev->use_count);
545}
546static DEVICE_ATTR_RO(num_users);
547
548static ssize_t type_show(struct device *dev, struct device_attribute *attr,
549 char *buf)
550{
551 struct regulator_dev *rdev = dev_get_drvdata(dev);
552
553 switch (rdev->desc->type) {
554 case REGULATOR_VOLTAGE:
555 return sprintf(buf, "voltage\n");
556 case REGULATOR_CURRENT:
557 return sprintf(buf, "current\n");
558 }
559 return sprintf(buf, "unknown\n");
560}
561static DEVICE_ATTR_RO(type);
562
563static ssize_t regulator_suspend_mem_uV_show(struct device *dev,
564 struct device_attribute *attr, char *buf)
565{
566 struct regulator_dev *rdev = dev_get_drvdata(dev);
567
568 return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV);
569}
570static DEVICE_ATTR(suspend_mem_microvolts, 0444,
571 regulator_suspend_mem_uV_show, NULL);
572
573static ssize_t regulator_suspend_disk_uV_show(struct device *dev,
574 struct device_attribute *attr, char *buf)
575{
576 struct regulator_dev *rdev = dev_get_drvdata(dev);
577
578 return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV);
579}
580static DEVICE_ATTR(suspend_disk_microvolts, 0444,
581 regulator_suspend_disk_uV_show, NULL);
582
583static ssize_t regulator_suspend_standby_uV_show(struct device *dev,
584 struct device_attribute *attr, char *buf)
585{
586 struct regulator_dev *rdev = dev_get_drvdata(dev);
587
588 return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV);
589}
590static DEVICE_ATTR(suspend_standby_microvolts, 0444,
591 regulator_suspend_standby_uV_show, NULL);
592
593static ssize_t regulator_suspend_mem_mode_show(struct device *dev,
594 struct device_attribute *attr, char *buf)
595{
596 struct regulator_dev *rdev = dev_get_drvdata(dev);
597
598 return regulator_print_opmode(buf,
599 rdev->constraints->state_mem.mode);
600}
601static DEVICE_ATTR(suspend_mem_mode, 0444,
602 regulator_suspend_mem_mode_show, NULL);
603
604static ssize_t regulator_suspend_disk_mode_show(struct device *dev,
605 struct device_attribute *attr, char *buf)
606{
607 struct regulator_dev *rdev = dev_get_drvdata(dev);
608
609 return regulator_print_opmode(buf,
610 rdev->constraints->state_disk.mode);
611}
612static DEVICE_ATTR(suspend_disk_mode, 0444,
613 regulator_suspend_disk_mode_show, NULL);
614
615static ssize_t regulator_suspend_standby_mode_show(struct device *dev,
616 struct device_attribute *attr, char *buf)
617{
618 struct regulator_dev *rdev = dev_get_drvdata(dev);
619
620 return regulator_print_opmode(buf,
621 rdev->constraints->state_standby.mode);
622}
623static DEVICE_ATTR(suspend_standby_mode, 0444,
624 regulator_suspend_standby_mode_show, NULL);
625
626static ssize_t regulator_suspend_mem_state_show(struct device *dev,
627 struct device_attribute *attr, char *buf)
628{
629 struct regulator_dev *rdev = dev_get_drvdata(dev);
630
631 return regulator_print_state(buf,
632 rdev->constraints->state_mem.enabled);
633}
634static DEVICE_ATTR(suspend_mem_state, 0444,
635 regulator_suspend_mem_state_show, NULL);
636
637static ssize_t regulator_suspend_disk_state_show(struct device *dev,
638 struct device_attribute *attr, char *buf)
639{
640 struct regulator_dev *rdev = dev_get_drvdata(dev);
641
642 return regulator_print_state(buf,
643 rdev->constraints->state_disk.enabled);
644}
645static DEVICE_ATTR(suspend_disk_state, 0444,
646 regulator_suspend_disk_state_show, NULL);
647
648static ssize_t regulator_suspend_standby_state_show(struct device *dev,
649 struct device_attribute *attr, char *buf)
650{
651 struct regulator_dev *rdev = dev_get_drvdata(dev);
652
653 return regulator_print_state(buf,
654 rdev->constraints->state_standby.enabled);
655}
656static DEVICE_ATTR(suspend_standby_state, 0444,
657 regulator_suspend_standby_state_show, NULL);
658
659static ssize_t regulator_bypass_show(struct device *dev,
660 struct device_attribute *attr, char *buf)
661{
662 struct regulator_dev *rdev = dev_get_drvdata(dev);
663 const char *report;
664 bool bypass;
665 int ret;
666
667 ret = rdev->desc->ops->get_bypass(rdev, &bypass);
668
669 if (ret != 0)
670 report = "unknown";
671 else if (bypass)
672 report = "enabled";
673 else
674 report = "disabled";
675
676 return sprintf(buf, "%s\n", report);
677}
678static DEVICE_ATTR(bypass, 0444,
679 regulator_bypass_show, NULL);
680
681
682
683static int drms_uA_update(struct regulator_dev *rdev)
684{
685 struct regulator *sibling;
686 int current_uA = 0, output_uV, input_uV, err;
687 unsigned int mode;
688
689 lockdep_assert_held_once(&rdev->mutex);
690
691
692
693
694
695 err = regulator_check_drms(rdev);
696 if (err < 0)
697 return 0;
698
699 if (!rdev->desc->ops->get_optimum_mode &&
700 !rdev->desc->ops->set_load)
701 return 0;
702
703 if (!rdev->desc->ops->set_mode &&
704 !rdev->desc->ops->set_load)
705 return -EINVAL;
706
707
708 output_uV = _regulator_get_voltage(rdev);
709 if (output_uV <= 0) {
710 rdev_err(rdev, "invalid output voltage found\n");
711 return -EINVAL;
712 }
713
714
715 input_uV = 0;
716 if (rdev->supply)
717 input_uV = regulator_get_voltage(rdev->supply);
718 if (input_uV <= 0)
719 input_uV = rdev->constraints->input_uV;
720 if (input_uV <= 0) {
721 rdev_err(rdev, "invalid input voltage found\n");
722 return -EINVAL;
723 }
724
725
726 list_for_each_entry(sibling, &rdev->consumer_list, list)
727 current_uA += sibling->uA_load;
728
729 current_uA += rdev->constraints->system_load;
730
731 if (rdev->desc->ops->set_load) {
732
733 err = rdev->desc->ops->set_load(rdev, current_uA);
734 if (err < 0)
735 rdev_err(rdev, "failed to set load %d\n", current_uA);
736 } else {
737
738 mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV,
739 output_uV, current_uA);
740
741
742 err = regulator_mode_constrain(rdev, &mode);
743 if (err < 0) {
744 rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n",
745 current_uA, input_uV, output_uV);
746 return err;
747 }
748
749 err = rdev->desc->ops->set_mode(rdev, mode);
750 if (err < 0)
751 rdev_err(rdev, "failed to set optimum mode %x\n", mode);
752 }
753
754 return err;
755}
756
757static int suspend_set_state(struct regulator_dev *rdev,
758 struct regulator_state *rstate)
759{
760 int ret = 0;
761
762
763
764
765
766 if (!rstate->enabled && !rstate->disabled) {
767 if (rdev->desc->ops->set_suspend_voltage ||
768 rdev->desc->ops->set_suspend_mode)
769 rdev_warn(rdev, "No configuration\n");
770 return 0;
771 }
772
773 if (rstate->enabled && rstate->disabled) {
774 rdev_err(rdev, "invalid configuration\n");
775 return -EINVAL;
776 }
777
778 if (rstate->enabled && rdev->desc->ops->set_suspend_enable)
779 ret = rdev->desc->ops->set_suspend_enable(rdev);
780 else if (rstate->disabled && rdev->desc->ops->set_suspend_disable)
781 ret = rdev->desc->ops->set_suspend_disable(rdev);
782 else
783 ret = 0;
784
785 if (ret < 0) {
786 rdev_err(rdev, "failed to enabled/disable\n");
787 return ret;
788 }
789
790 if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) {
791 ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV);
792 if (ret < 0) {
793 rdev_err(rdev, "failed to set voltage\n");
794 return ret;
795 }
796 }
797
798 if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) {
799 ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode);
800 if (ret < 0) {
801 rdev_err(rdev, "failed to set mode\n");
802 return ret;
803 }
804 }
805 return ret;
806}
807
808
809static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state)
810{
811 lockdep_assert_held_once(&rdev->mutex);
812
813 if (!rdev->constraints)
814 return -EINVAL;
815
816 switch (state) {
817 case PM_SUSPEND_STANDBY:
818 return suspend_set_state(rdev,
819 &rdev->constraints->state_standby);
820 case PM_SUSPEND_MEM:
821 return suspend_set_state(rdev,
822 &rdev->constraints->state_mem);
823 case PM_SUSPEND_MAX:
824 return suspend_set_state(rdev,
825 &rdev->constraints->state_disk);
826 default:
827 return -EINVAL;
828 }
829}
830
831static void print_constraints(struct regulator_dev *rdev)
832{
833 struct regulation_constraints *constraints = rdev->constraints;
834 char buf[160] = "";
835 size_t len = sizeof(buf) - 1;
836 int count = 0;
837 int ret;
838
839 if (constraints->min_uV && constraints->max_uV) {
840 if (constraints->min_uV == constraints->max_uV)
841 count += scnprintf(buf + count, len - count, "%d mV ",
842 constraints->min_uV / 1000);
843 else
844 count += scnprintf(buf + count, len - count,
845 "%d <--> %d mV ",
846 constraints->min_uV / 1000,
847 constraints->max_uV / 1000);
848 }
849
850 if (!constraints->min_uV ||
851 constraints->min_uV != constraints->max_uV) {
852 ret = _regulator_get_voltage(rdev);
853 if (ret > 0)
854 count += scnprintf(buf + count, len - count,
855 "at %d mV ", ret / 1000);
856 }
857
858 if (constraints->uV_offset)
859 count += scnprintf(buf + count, len - count, "%dmV offset ",
860 constraints->uV_offset / 1000);
861
862 if (constraints->min_uA && constraints->max_uA) {
863 if (constraints->min_uA == constraints->max_uA)
864 count += scnprintf(buf + count, len - count, "%d mA ",
865 constraints->min_uA / 1000);
866 else
867 count += scnprintf(buf + count, len - count,
868 "%d <--> %d mA ",
869 constraints->min_uA / 1000,
870 constraints->max_uA / 1000);
871 }
872
873 if (!constraints->min_uA ||
874 constraints->min_uA != constraints->max_uA) {
875 ret = _regulator_get_current_limit(rdev);
876 if (ret > 0)
877 count += scnprintf(buf + count, len - count,
878 "at %d mA ", ret / 1000);
879 }
880
881 if (constraints->valid_modes_mask & REGULATOR_MODE_FAST)
882 count += scnprintf(buf + count, len - count, "fast ");
883 if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL)
884 count += scnprintf(buf + count, len - count, "normal ");
885 if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE)
886 count += scnprintf(buf + count, len - count, "idle ");
887 if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY)
888 count += scnprintf(buf + count, len - count, "standby");
889
890 if (!count)
891 scnprintf(buf, len, "no parameters");
892
893 rdev_dbg(rdev, "%s\n", buf);
894
895 if ((constraints->min_uV != constraints->max_uV) &&
896 !(constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE))
897 rdev_warn(rdev,
898 "Voltage range but no REGULATOR_CHANGE_VOLTAGE\n");
899}
900
901static int machine_constraints_voltage(struct regulator_dev *rdev,
902 struct regulation_constraints *constraints)
903{
904 const struct regulator_ops *ops = rdev->desc->ops;
905 int ret;
906
907
908 if (rdev->constraints->apply_uV &&
909 rdev->constraints->min_uV == rdev->constraints->max_uV) {
910 int current_uV = _regulator_get_voltage(rdev);
911 if (current_uV < 0) {
912 rdev_err(rdev,
913 "failed to get the current voltage(%d)\n",
914 current_uV);
915 return current_uV;
916 }
917 if (current_uV < rdev->constraints->min_uV ||
918 current_uV > rdev->constraints->max_uV) {
919 ret = _regulator_do_set_voltage(
920 rdev, rdev->constraints->min_uV,
921 rdev->constraints->max_uV);
922 if (ret < 0) {
923 rdev_err(rdev,
924 "failed to apply %duV constraint(%d)\n",
925 rdev->constraints->min_uV, ret);
926 return ret;
927 }
928 }
929 }
930
931
932
933
934 if (ops->list_voltage && rdev->desc->n_voltages) {
935 int count = rdev->desc->n_voltages;
936 int i;
937 int min_uV = INT_MAX;
938 int max_uV = INT_MIN;
939 int cmin = constraints->min_uV;
940 int cmax = constraints->max_uV;
941
942
943
944 if (count == 1 && !cmin) {
945 cmin = 1;
946 cmax = INT_MAX;
947 constraints->min_uV = cmin;
948 constraints->max_uV = cmax;
949 }
950
951
952 if ((cmin == 0) && (cmax == 0))
953 return 0;
954
955
956 if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
957 rdev_err(rdev, "invalid voltage constraints\n");
958 return -EINVAL;
959 }
960
961
962 for (i = 0; i < count; i++) {
963 int value;
964
965 value = ops->list_voltage(rdev, i);
966 if (value <= 0)
967 continue;
968
969
970 if (value >= cmin && value < min_uV)
971 min_uV = value;
972 if (value <= cmax && value > max_uV)
973 max_uV = value;
974 }
975
976
977 if (max_uV < min_uV) {
978 rdev_err(rdev,
979 "unsupportable voltage constraints %u-%uuV\n",
980 min_uV, max_uV);
981 return -EINVAL;
982 }
983
984
985 if (constraints->min_uV < min_uV) {
986 rdev_dbg(rdev, "override min_uV, %d -> %d\n",
987 constraints->min_uV, min_uV);
988 constraints->min_uV = min_uV;
989 }
990 if (constraints->max_uV > max_uV) {
991 rdev_dbg(rdev, "override max_uV, %d -> %d\n",
992 constraints->max_uV, max_uV);
993 constraints->max_uV = max_uV;
994 }
995 }
996
997 return 0;
998}
999
1000static int machine_constraints_current(struct regulator_dev *rdev,
1001 struct regulation_constraints *constraints)
1002{
1003 const struct regulator_ops *ops = rdev->desc->ops;
1004 int ret;
1005
1006 if (!constraints->min_uA && !constraints->max_uA)
1007 return 0;
1008
1009 if (constraints->min_uA > constraints->max_uA) {
1010 rdev_err(rdev, "Invalid current constraints\n");
1011 return -EINVAL;
1012 }
1013
1014 if (!ops->set_current_limit || !ops->get_current_limit) {
1015 rdev_warn(rdev, "Operation of current configuration missing\n");
1016 return 0;
1017 }
1018
1019
1020 ret = ops->set_current_limit(rdev, constraints->min_uA,
1021 constraints->max_uA);
1022 if (ret < 0) {
1023 rdev_err(rdev, "Failed to set current constraint, %d\n", ret);
1024 return ret;
1025 }
1026
1027 return 0;
1028}
1029
1030static int _regulator_do_enable(struct regulator_dev *rdev);
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043static int set_machine_constraints(struct regulator_dev *rdev,
1044 const struct regulation_constraints *constraints)
1045{
1046 int ret = 0;
1047 const struct regulator_ops *ops = rdev->desc->ops;
1048
1049 if (constraints)
1050 rdev->constraints = kmemdup(constraints, sizeof(*constraints),
1051 GFP_KERNEL);
1052 else
1053 rdev->constraints = kzalloc(sizeof(*constraints),
1054 GFP_KERNEL);
1055 if (!rdev->constraints)
1056 return -ENOMEM;
1057
1058 ret = machine_constraints_voltage(rdev, rdev->constraints);
1059 if (ret != 0)
1060 return ret;
1061
1062 ret = machine_constraints_current(rdev, rdev->constraints);
1063 if (ret != 0)
1064 return ret;
1065
1066 if (rdev->constraints->ilim_uA && ops->set_input_current_limit) {
1067 ret = ops->set_input_current_limit(rdev,
1068 rdev->constraints->ilim_uA);
1069 if (ret < 0) {
1070 rdev_err(rdev, "failed to set input limit\n");
1071 return ret;
1072 }
1073 }
1074
1075
1076 if (rdev->constraints->initial_state) {
1077 ret = suspend_prepare(rdev, rdev->constraints->initial_state);
1078 if (ret < 0) {
1079 rdev_err(rdev, "failed to set suspend state\n");
1080 return ret;
1081 }
1082 }
1083
1084 if (rdev->constraints->initial_mode) {
1085 if (!ops->set_mode) {
1086 rdev_err(rdev, "no set_mode operation\n");
1087 return -EINVAL;
1088 }
1089
1090 ret = ops->set_mode(rdev, rdev->constraints->initial_mode);
1091 if (ret < 0) {
1092 rdev_err(rdev, "failed to set initial mode: %d\n", ret);
1093 return ret;
1094 }
1095 }
1096
1097
1098
1099
1100 if (rdev->constraints->always_on || rdev->constraints->boot_on) {
1101 ret = _regulator_do_enable(rdev);
1102 if (ret < 0 && ret != -EINVAL) {
1103 rdev_err(rdev, "failed to enable\n");
1104 return ret;
1105 }
1106 }
1107
1108 if ((rdev->constraints->ramp_delay || rdev->constraints->ramp_disable)
1109 && ops->set_ramp_delay) {
1110 ret = ops->set_ramp_delay(rdev, rdev->constraints->ramp_delay);
1111 if (ret < 0) {
1112 rdev_err(rdev, "failed to set ramp_delay\n");
1113 return ret;
1114 }
1115 }
1116
1117 if (rdev->constraints->pull_down && ops->set_pull_down) {
1118 ret = ops->set_pull_down(rdev);
1119 if (ret < 0) {
1120 rdev_err(rdev, "failed to set pull down\n");
1121 return ret;
1122 }
1123 }
1124
1125 if (rdev->constraints->soft_start && ops->set_soft_start) {
1126 ret = ops->set_soft_start(rdev);
1127 if (ret < 0) {
1128 rdev_err(rdev, "failed to set soft start\n");
1129 return ret;
1130 }
1131 }
1132
1133 if (rdev->constraints->over_current_protection
1134 && ops->set_over_current_protection) {
1135 ret = ops->set_over_current_protection(rdev);
1136 if (ret < 0) {
1137 rdev_err(rdev, "failed to set over current protection\n");
1138 return ret;
1139 }
1140 }
1141
1142 if (rdev->constraints->active_discharge && ops->set_active_discharge) {
1143 bool ad_state = (rdev->constraints->active_discharge ==
1144 REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false;
1145
1146 ret = ops->set_active_discharge(rdev, ad_state);
1147 if (ret < 0) {
1148 rdev_err(rdev, "failed to set active discharge\n");
1149 return ret;
1150 }
1151 }
1152
1153 if (rdev->constraints->active_discharge && ops->set_active_discharge) {
1154 bool ad_state = (rdev->constraints->active_discharge ==
1155 REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false;
1156
1157 ret = ops->set_active_discharge(rdev, ad_state);
1158 if (ret < 0) {
1159 rdev_err(rdev, "failed to set active discharge\n");
1160 return ret;
1161 }
1162 }
1163
1164 print_constraints(rdev);
1165 return 0;
1166}
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177static int set_supply(struct regulator_dev *rdev,
1178 struct regulator_dev *supply_rdev)
1179{
1180 int err;
1181
1182 rdev_info(rdev, "supplied by %s\n", rdev_get_name(supply_rdev));
1183
1184 if (!try_module_get(supply_rdev->owner))
1185 return -ENODEV;
1186
1187 rdev->supply = create_regulator(supply_rdev, &rdev->dev, "SUPPLY");
1188 if (rdev->supply == NULL) {
1189 err = -ENOMEM;
1190 return err;
1191 }
1192 supply_rdev->open_count++;
1193
1194 return 0;
1195}
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208static int set_consumer_device_supply(struct regulator_dev *rdev,
1209 const char *consumer_dev_name,
1210 const char *supply)
1211{
1212 struct regulator_map *node;
1213 int has_dev;
1214
1215 if (supply == NULL)
1216 return -EINVAL;
1217
1218 if (consumer_dev_name != NULL)
1219 has_dev = 1;
1220 else
1221 has_dev = 0;
1222
1223 list_for_each_entry(node, ®ulator_map_list, list) {
1224 if (node->dev_name && consumer_dev_name) {
1225 if (strcmp(node->dev_name, consumer_dev_name) != 0)
1226 continue;
1227 } else if (node->dev_name || consumer_dev_name) {
1228 continue;
1229 }
1230
1231 if (strcmp(node->supply, supply) != 0)
1232 continue;
1233
1234 pr_debug("%s: %s/%s is '%s' supply; fail %s/%s\n",
1235 consumer_dev_name,
1236 dev_name(&node->regulator->dev),
1237 node->regulator->desc->name,
1238 supply,
1239 dev_name(&rdev->dev), rdev_get_name(rdev));
1240 return -EBUSY;
1241 }
1242
1243 node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL);
1244 if (node == NULL)
1245 return -ENOMEM;
1246
1247 node->regulator = rdev;
1248 node->supply = supply;
1249
1250 if (has_dev) {
1251 node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL);
1252 if (node->dev_name == NULL) {
1253 kfree(node);
1254 return -ENOMEM;
1255 }
1256 }
1257
1258 list_add(&node->list, ®ulator_map_list);
1259 return 0;
1260}
1261
1262static void unset_regulator_supplies(struct regulator_dev *rdev)
1263{
1264 struct regulator_map *node, *n;
1265
1266 list_for_each_entry_safe(node, n, ®ulator_map_list, list) {
1267 if (rdev == node->regulator) {
1268 list_del(&node->list);
1269 kfree(node->dev_name);
1270 kfree(node);
1271 }
1272 }
1273}
1274
1275#define REG_STR_SIZE 64
1276
1277static struct regulator *create_regulator(struct regulator_dev *rdev,
1278 struct device *dev,
1279 const char *supply_name)
1280{
1281 struct regulator *regulator;
1282 char buf[REG_STR_SIZE];
1283 int err, size;
1284
1285 regulator = kzalloc(sizeof(*regulator), GFP_KERNEL);
1286 if (regulator == NULL)
1287 return NULL;
1288
1289 mutex_lock(&rdev->mutex);
1290 regulator->rdev = rdev;
1291 list_add(®ulator->list, &rdev->consumer_list);
1292
1293 if (dev) {
1294 regulator->dev = dev;
1295
1296
1297 size = scnprintf(buf, REG_STR_SIZE, "%s-%s",
1298 dev->kobj.name, supply_name);
1299 if (size >= REG_STR_SIZE)
1300 goto overflow_err;
1301
1302 regulator->supply_name = kstrdup(buf, GFP_KERNEL);
1303 if (regulator->supply_name == NULL)
1304 goto overflow_err;
1305
1306 err = sysfs_create_link_nowarn(&rdev->dev.kobj, &dev->kobj,
1307 buf);
1308 if (err) {
1309 rdev_dbg(rdev, "could not add device link %s err %d\n",
1310 dev->kobj.name, err);
1311
1312 }
1313 } else {
1314 regulator->supply_name = kstrdup(supply_name, GFP_KERNEL);
1315 if (regulator->supply_name == NULL)
1316 goto overflow_err;
1317 }
1318
1319 regulator->debugfs = debugfs_create_dir(regulator->supply_name,
1320 rdev->debugfs);
1321 if (!regulator->debugfs) {
1322 rdev_dbg(rdev, "Failed to create debugfs directory\n");
1323 } else {
1324 debugfs_create_u32("uA_load", 0444, regulator->debugfs,
1325 ®ulator->uA_load);
1326 debugfs_create_u32("min_uV", 0444, regulator->debugfs,
1327 ®ulator->min_uV);
1328 debugfs_create_u32("max_uV", 0444, regulator->debugfs,
1329 ®ulator->max_uV);
1330 }
1331
1332
1333
1334
1335
1336
1337 if (!_regulator_can_change_status(rdev) &&
1338 _regulator_is_enabled(rdev))
1339 regulator->always_on = true;
1340
1341 mutex_unlock(&rdev->mutex);
1342 return regulator;
1343overflow_err:
1344 list_del(®ulator->list);
1345 kfree(regulator);
1346 mutex_unlock(&rdev->mutex);
1347 return NULL;
1348}
1349
1350static int _regulator_get_enable_time(struct regulator_dev *rdev)
1351{
1352 if (rdev->constraints && rdev->constraints->enable_time)
1353 return rdev->constraints->enable_time;
1354 if (!rdev->desc->ops->enable_time)
1355 return rdev->desc->enable_time;
1356 return rdev->desc->ops->enable_time(rdev);
1357}
1358
1359static struct regulator_supply_alias *regulator_find_supply_alias(
1360 struct device *dev, const char *supply)
1361{
1362 struct regulator_supply_alias *map;
1363
1364 list_for_each_entry(map, ®ulator_supply_alias_list, list)
1365 if (map->src_dev == dev && strcmp(map->src_supply, supply) == 0)
1366 return map;
1367
1368 return NULL;
1369}
1370
1371static void regulator_supply_alias(struct device **dev, const char **supply)
1372{
1373 struct regulator_supply_alias *map;
1374
1375 map = regulator_find_supply_alias(*dev, *supply);
1376 if (map) {
1377 dev_dbg(*dev, "Mapping supply %s to %s,%s\n",
1378 *supply, map->alias_supply,
1379 dev_name(map->alias_dev));
1380 *dev = map->alias_dev;
1381 *supply = map->alias_supply;
1382 }
1383}
1384
1385static int of_node_match(struct device *dev, const void *data)
1386{
1387 return dev->of_node == data;
1388}
1389
1390static struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
1391{
1392 struct device *dev;
1393
1394 dev = class_find_device(®ulator_class, NULL, np, of_node_match);
1395
1396 return dev ? dev_to_rdev(dev) : NULL;
1397}
1398
1399static int regulator_match(struct device *dev, const void *data)
1400{
1401 struct regulator_dev *r = dev_to_rdev(dev);
1402
1403 return strcmp(rdev_get_name(r), data) == 0;
1404}
1405
1406static struct regulator_dev *regulator_lookup_by_name(const char *name)
1407{
1408 struct device *dev;
1409
1410 dev = class_find_device(®ulator_class, NULL, name, regulator_match);
1411
1412 return dev ? dev_to_rdev(dev) : NULL;
1413}
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426static struct regulator_dev *regulator_dev_lookup(struct device *dev,
1427 const char *supply,
1428 int *ret)
1429{
1430 struct regulator_dev *r;
1431 struct device_node *node;
1432 struct regulator_map *map;
1433 const char *devname = NULL;
1434
1435 regulator_supply_alias(&dev, &supply);
1436
1437
1438 if (dev && dev->of_node) {
1439 node = of_get_regulator(dev, supply);
1440 if (node) {
1441 r = of_find_regulator_by_node(node);
1442 if (r)
1443 return r;
1444 *ret = -EPROBE_DEFER;
1445 return NULL;
1446 } else {
1447
1448
1449
1450
1451
1452
1453 *ret = -ENODEV;
1454 }
1455 }
1456
1457
1458 if (dev)
1459 devname = dev_name(dev);
1460
1461 r = regulator_lookup_by_name(supply);
1462 if (r)
1463 return r;
1464
1465 mutex_lock(®ulator_list_mutex);
1466 list_for_each_entry(map, ®ulator_map_list, list) {
1467
1468 if (map->dev_name &&
1469 (!devname || strcmp(map->dev_name, devname)))
1470 continue;
1471
1472 if (strcmp(map->supply, supply) == 0 &&
1473 get_device(&map->regulator->dev)) {
1474 mutex_unlock(®ulator_list_mutex);
1475 return map->regulator;
1476 }
1477 }
1478 mutex_unlock(®ulator_list_mutex);
1479
1480 return NULL;
1481}
1482
1483static int regulator_resolve_supply(struct regulator_dev *rdev)
1484{
1485 struct regulator_dev *r;
1486 struct device *dev = rdev->dev.parent;
1487 int ret;
1488
1489
1490 if (!rdev->supply_name)
1491 return 0;
1492
1493
1494 if (rdev->supply)
1495 return 0;
1496
1497 r = regulator_dev_lookup(dev, rdev->supply_name, &ret);
1498 if (!r) {
1499 if (ret == -ENODEV) {
1500
1501
1502
1503
1504 return 0;
1505 }
1506
1507
1508 if (ret == -EPROBE_DEFER)
1509 return ret;
1510
1511 if (have_full_constraints()) {
1512 r = dummy_regulator_rdev;
1513 get_device(&r->dev);
1514 } else {
1515 dev_err(dev, "Failed to resolve %s-supply for %s\n",
1516 rdev->supply_name, rdev->desc->name);
1517 return -EPROBE_DEFER;
1518 }
1519 }
1520
1521
1522 ret = regulator_resolve_supply(r);
1523 if (ret < 0) {
1524 put_device(&r->dev);
1525 return ret;
1526 }
1527
1528 ret = set_supply(rdev, r);
1529 if (ret < 0) {
1530 put_device(&r->dev);
1531 return ret;
1532 }
1533
1534
1535 if (_regulator_is_enabled(rdev) && rdev->supply) {
1536 ret = regulator_enable(rdev->supply);
1537 if (ret < 0) {
1538 _regulator_put(rdev->supply);
1539 return ret;
1540 }
1541 }
1542
1543 return 0;
1544}
1545
1546
1547static struct regulator *_regulator_get(struct device *dev, const char *id,
1548 bool exclusive, bool allow_dummy)
1549{
1550 struct regulator_dev *rdev;
1551 struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
1552 const char *devname = NULL;
1553 int ret;
1554
1555 if (id == NULL) {
1556 pr_err("get() with no identifier\n");
1557 return ERR_PTR(-EINVAL);
1558 }
1559
1560 if (dev)
1561 devname = dev_name(dev);
1562
1563 if (have_full_constraints())
1564 ret = -ENODEV;
1565 else
1566 ret = -EPROBE_DEFER;
1567
1568 rdev = regulator_dev_lookup(dev, id, &ret);
1569 if (rdev)
1570 goto found;
1571
1572 regulator = ERR_PTR(ret);
1573
1574
1575
1576
1577
1578 if (ret && ret != -ENODEV)
1579 return regulator;
1580
1581 if (!devname)
1582 devname = "deviceless";
1583
1584
1585
1586
1587
1588 if (have_full_constraints() && allow_dummy) {
1589 pr_warn("%s supply %s not found, using dummy regulator\n",
1590 devname, id);
1591
1592 rdev = dummy_regulator_rdev;
1593 get_device(&rdev->dev);
1594 goto found;
1595
1596 } else if (!have_full_constraints() || exclusive) {
1597 dev_warn(dev, "dummy supplies not allowed\n");
1598 }
1599
1600 return regulator;
1601
1602found:
1603 if (rdev->exclusive) {
1604 regulator = ERR_PTR(-EPERM);
1605 put_device(&rdev->dev);
1606 return regulator;
1607 }
1608
1609 if (exclusive && rdev->open_count) {
1610 regulator = ERR_PTR(-EBUSY);
1611 put_device(&rdev->dev);
1612 return regulator;
1613 }
1614
1615 ret = regulator_resolve_supply(rdev);
1616 if (ret < 0) {
1617 regulator = ERR_PTR(ret);
1618 put_device(&rdev->dev);
1619 return regulator;
1620 }
1621
1622 if (!try_module_get(rdev->owner)) {
1623 put_device(&rdev->dev);
1624 return regulator;
1625 }
1626
1627 regulator = create_regulator(rdev, dev, id);
1628 if (regulator == NULL) {
1629 regulator = ERR_PTR(-ENOMEM);
1630 put_device(&rdev->dev);
1631 module_put(rdev->owner);
1632 return regulator;
1633 }
1634
1635 rdev->open_count++;
1636 if (exclusive) {
1637 rdev->exclusive = 1;
1638
1639 ret = _regulator_is_enabled(rdev);
1640 if (ret > 0)
1641 rdev->use_count = 1;
1642 else
1643 rdev->use_count = 0;
1644 }
1645
1646 return regulator;
1647}
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662struct regulator *regulator_get(struct device *dev, const char *id)
1663{
1664 return _regulator_get(dev, id, false, true);
1665}
1666EXPORT_SYMBOL_GPL(regulator_get);
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689struct regulator *regulator_get_exclusive(struct device *dev, const char *id)
1690{
1691 return _regulator_get(dev, id, true, false);
1692}
1693EXPORT_SYMBOL_GPL(regulator_get_exclusive);
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715struct regulator *regulator_get_optional(struct device *dev, const char *id)
1716{
1717 return _regulator_get(dev, id, false, false);
1718}
1719EXPORT_SYMBOL_GPL(regulator_get_optional);
1720
1721
1722static void _regulator_put(struct regulator *regulator)
1723{
1724 struct regulator_dev *rdev;
1725
1726 if (IS_ERR_OR_NULL(regulator))
1727 return;
1728
1729 lockdep_assert_held_once(®ulator_list_mutex);
1730
1731 rdev = regulator->rdev;
1732
1733 debugfs_remove_recursive(regulator->debugfs);
1734
1735
1736 if (regulator->dev)
1737 sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
1738 mutex_lock(&rdev->mutex);
1739 list_del(®ulator->list);
1740
1741 rdev->open_count--;
1742 rdev->exclusive = 0;
1743 put_device(&rdev->dev);
1744 mutex_unlock(&rdev->mutex);
1745
1746 kfree(regulator->supply_name);
1747 kfree(regulator);
1748
1749 module_put(rdev->owner);
1750}
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760void regulator_put(struct regulator *regulator)
1761{
1762 mutex_lock(®ulator_list_mutex);
1763 _regulator_put(regulator);
1764 mutex_unlock(®ulator_list_mutex);
1765}
1766EXPORT_SYMBOL_GPL(regulator_put);
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780int regulator_register_supply_alias(struct device *dev, const char *id,
1781 struct device *alias_dev,
1782 const char *alias_id)
1783{
1784 struct regulator_supply_alias *map;
1785
1786 map = regulator_find_supply_alias(dev, id);
1787 if (map)
1788 return -EEXIST;
1789
1790 map = kzalloc(sizeof(struct regulator_supply_alias), GFP_KERNEL);
1791 if (!map)
1792 return -ENOMEM;
1793
1794 map->src_dev = dev;
1795 map->src_supply = id;
1796 map->alias_dev = alias_dev;
1797 map->alias_supply = alias_id;
1798
1799 list_add(&map->list, ®ulator_supply_alias_list);
1800
1801 pr_info("Adding alias for supply %s,%s -> %s,%s\n",
1802 id, dev_name(dev), alias_id, dev_name(alias_dev));
1803
1804 return 0;
1805}
1806EXPORT_SYMBOL_GPL(regulator_register_supply_alias);
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816void regulator_unregister_supply_alias(struct device *dev, const char *id)
1817{
1818 struct regulator_supply_alias *map;
1819
1820 map = regulator_find_supply_alias(dev, id);
1821 if (map) {
1822 list_del(&map->list);
1823 kfree(map);
1824 }
1825}
1826EXPORT_SYMBOL_GPL(regulator_unregister_supply_alias);
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845int regulator_bulk_register_supply_alias(struct device *dev,
1846 const char *const *id,
1847 struct device *alias_dev,
1848 const char *const *alias_id,
1849 int num_id)
1850{
1851 int i;
1852 int ret;
1853
1854 for (i = 0; i < num_id; ++i) {
1855 ret = regulator_register_supply_alias(dev, id[i], alias_dev,
1856 alias_id[i]);
1857 if (ret < 0)
1858 goto err;
1859 }
1860
1861 return 0;
1862
1863err:
1864 dev_err(dev,
1865 "Failed to create supply alias %s,%s -> %s,%s\n",
1866 id[i], dev_name(dev), alias_id[i], dev_name(alias_dev));
1867
1868 while (--i >= 0)
1869 regulator_unregister_supply_alias(dev, id[i]);
1870
1871 return ret;
1872}
1873EXPORT_SYMBOL_GPL(regulator_bulk_register_supply_alias);
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885void regulator_bulk_unregister_supply_alias(struct device *dev,
1886 const char *const *id,
1887 int num_id)
1888{
1889 int i;
1890
1891 for (i = 0; i < num_id; ++i)
1892 regulator_unregister_supply_alias(dev, id[i]);
1893}
1894EXPORT_SYMBOL_GPL(regulator_bulk_unregister_supply_alias);
1895
1896
1897
1898static int regulator_ena_gpio_request(struct regulator_dev *rdev,
1899 const struct regulator_config *config)
1900{
1901 struct regulator_enable_gpio *pin;
1902 struct gpio_desc *gpiod;
1903 int ret;
1904
1905 gpiod = gpio_to_desc(config->ena_gpio);
1906
1907 list_for_each_entry(pin, ®ulator_ena_gpio_list, list) {
1908 if (pin->gpiod == gpiod) {
1909 rdev_dbg(rdev, "GPIO %d is already used\n",
1910 config->ena_gpio);
1911 goto update_ena_gpio_to_rdev;
1912 }
1913 }
1914
1915 ret = gpio_request_one(config->ena_gpio,
1916 GPIOF_DIR_OUT | config->ena_gpio_flags,
1917 rdev_get_name(rdev));
1918 if (ret)
1919 return ret;
1920
1921 pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
1922 if (pin == NULL) {
1923 gpio_free(config->ena_gpio);
1924 return -ENOMEM;
1925 }
1926
1927 pin->gpiod = gpiod;
1928 pin->ena_gpio_invert = config->ena_gpio_invert;
1929 list_add(&pin->list, ®ulator_ena_gpio_list);
1930
1931update_ena_gpio_to_rdev:
1932 pin->request_count++;
1933 rdev->ena_pin = pin;
1934 return 0;
1935}
1936
1937static void regulator_ena_gpio_free(struct regulator_dev *rdev)
1938{
1939 struct regulator_enable_gpio *pin, *n;
1940
1941 if (!rdev->ena_pin)
1942 return;
1943
1944
1945 list_for_each_entry_safe(pin, n, ®ulator_ena_gpio_list, list) {
1946 if (pin->gpiod == rdev->ena_pin->gpiod) {
1947 if (pin->request_count <= 1) {
1948 pin->request_count = 0;
1949 gpiod_put(pin->gpiod);
1950 list_del(&pin->list);
1951 kfree(pin);
1952 rdev->ena_pin = NULL;
1953 return;
1954 } else {
1955 pin->request_count--;
1956 }
1957 }
1958 }
1959}
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
1970{
1971 struct regulator_enable_gpio *pin = rdev->ena_pin;
1972
1973 if (!pin)
1974 return -EINVAL;
1975
1976 if (enable) {
1977
1978 if (pin->enable_count == 0)
1979 gpiod_set_value_cansleep(pin->gpiod,
1980 !pin->ena_gpio_invert);
1981
1982 pin->enable_count++;
1983 } else {
1984 if (pin->enable_count > 1) {
1985 pin->enable_count--;
1986 return 0;
1987 }
1988
1989
1990 if (pin->enable_count <= 1) {
1991 gpiod_set_value_cansleep(pin->gpiod,
1992 pin->ena_gpio_invert);
1993 pin->enable_count = 0;
1994 }
1995 }
1996
1997 return 0;
1998}
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011static void _regulator_enable_delay(unsigned int delay)
2012{
2013 unsigned int ms = delay / 1000;
2014 unsigned int us = delay % 1000;
2015
2016 if (ms > 0) {
2017
2018
2019
2020
2021 if (ms < 20)
2022 us += ms * 1000;
2023 else
2024 msleep(ms);
2025 }
2026
2027
2028
2029
2030
2031
2032
2033 if (us >= 10)
2034 usleep_range(us, us + 100);
2035 else
2036 udelay(us);
2037}
2038
2039static int _regulator_do_enable(struct regulator_dev *rdev)
2040{
2041 int ret, delay;
2042
2043
2044 ret = _regulator_get_enable_time(rdev);
2045 if (ret >= 0) {
2046 delay = ret;
2047 } else {
2048 rdev_warn(rdev, "enable_time() failed: %d\n", ret);
2049 delay = 0;
2050 }
2051
2052 trace_regulator_enable(rdev_get_name(rdev));
2053
2054 if (rdev->desc->off_on_delay) {
2055
2056
2057
2058 unsigned long start_jiffy = jiffies;
2059 unsigned long intended, max_delay, remaining;
2060
2061 max_delay = usecs_to_jiffies(rdev->desc->off_on_delay);
2062 intended = rdev->last_off_jiffy + max_delay;
2063
2064 if (time_before(start_jiffy, intended)) {
2065
2066
2067
2068
2069
2070
2071
2072 remaining = intended - start_jiffy;
2073 if (remaining <= max_delay)
2074 _regulator_enable_delay(
2075 jiffies_to_usecs(remaining));
2076 }
2077 }
2078
2079 if (rdev->ena_pin) {
2080 if (!rdev->ena_gpio_state) {
2081 ret = regulator_ena_gpio_ctrl(rdev, true);
2082 if (ret < 0)
2083 return ret;
2084 rdev->ena_gpio_state = 1;
2085 }
2086 } else if (rdev->desc->ops->enable) {
2087 ret = rdev->desc->ops->enable(rdev);
2088 if (ret < 0)
2089 return ret;
2090 } else {
2091 return -EINVAL;
2092 }
2093
2094
2095
2096
2097 trace_regulator_enable_delay(rdev_get_name(rdev));
2098
2099 _regulator_enable_delay(delay);
2100
2101 trace_regulator_enable_complete(rdev_get_name(rdev));
2102
2103 return 0;
2104}
2105
2106
2107static int _regulator_enable(struct regulator_dev *rdev)
2108{
2109 int ret;
2110
2111 lockdep_assert_held_once(&rdev->mutex);
2112
2113
2114 if (rdev->constraints &&
2115 (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS))
2116 drms_uA_update(rdev);
2117
2118 if (rdev->use_count == 0) {
2119
2120 ret = _regulator_is_enabled(rdev);
2121 if (ret == -EINVAL || ret == 0) {
2122 if (!_regulator_can_change_status(rdev))
2123 return -EPERM;
2124
2125 ret = _regulator_do_enable(rdev);
2126 if (ret < 0)
2127 return ret;
2128
2129 } else if (ret < 0) {
2130 rdev_err(rdev, "is_enabled() failed: %d\n", ret);
2131 return ret;
2132 }
2133
2134 }
2135
2136 rdev->use_count++;
2137
2138 return 0;
2139}
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152int regulator_enable(struct regulator *regulator)
2153{
2154 struct regulator_dev *rdev = regulator->rdev;
2155 int ret = 0;
2156
2157 if (regulator->always_on)
2158 return 0;
2159
2160 if (rdev->supply) {
2161 ret = regulator_enable(rdev->supply);
2162 if (ret != 0)
2163 return ret;
2164 }
2165
2166 mutex_lock(&rdev->mutex);
2167 ret = _regulator_enable(rdev);
2168 mutex_unlock(&rdev->mutex);
2169
2170 if (ret != 0 && rdev->supply)
2171 regulator_disable(rdev->supply);
2172
2173 return ret;
2174}
2175EXPORT_SYMBOL_GPL(regulator_enable);
2176
2177static int _regulator_do_disable(struct regulator_dev *rdev)
2178{
2179 int ret;
2180
2181 trace_regulator_disable(rdev_get_name(rdev));
2182
2183 if (rdev->ena_pin) {
2184 if (rdev->ena_gpio_state) {
2185 ret = regulator_ena_gpio_ctrl(rdev, false);
2186 if (ret < 0)
2187 return ret;
2188 rdev->ena_gpio_state = 0;
2189 }
2190
2191 } else if (rdev->desc->ops->disable) {
2192 ret = rdev->desc->ops->disable(rdev);
2193 if (ret != 0)
2194 return ret;
2195 }
2196
2197
2198
2199
2200 if (rdev->desc->off_on_delay)
2201 rdev->last_off_jiffy = jiffies;
2202
2203 trace_regulator_disable_complete(rdev_get_name(rdev));
2204
2205 return 0;
2206}
2207
2208
2209static int _regulator_disable(struct regulator_dev *rdev)
2210{
2211 int ret = 0;
2212
2213 lockdep_assert_held_once(&rdev->mutex);
2214
2215 if (WARN(rdev->use_count <= 0,
2216 "unbalanced disables for %s\n", rdev_get_name(rdev)))
2217 return -EIO;
2218
2219
2220 if (rdev->use_count == 1 &&
2221 (rdev->constraints && !rdev->constraints->always_on)) {
2222
2223
2224 if (_regulator_can_change_status(rdev)) {
2225 ret = _notifier_call_chain(rdev,
2226 REGULATOR_EVENT_PRE_DISABLE,
2227 NULL);
2228 if (ret & NOTIFY_STOP_MASK)
2229 return -EINVAL;
2230
2231 ret = _regulator_do_disable(rdev);
2232 if (ret < 0) {
2233 rdev_err(rdev, "failed to disable\n");
2234 _notifier_call_chain(rdev,
2235 REGULATOR_EVENT_ABORT_DISABLE,
2236 NULL);
2237 return ret;
2238 }
2239 _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
2240 NULL);
2241 }
2242
2243 rdev->use_count = 0;
2244 } else if (rdev->use_count > 1) {
2245
2246 if (rdev->constraints &&
2247 (rdev->constraints->valid_ops_mask &
2248 REGULATOR_CHANGE_DRMS))
2249 drms_uA_update(rdev);
2250
2251 rdev->use_count--;
2252 }
2253
2254 return ret;
2255}
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269int regulator_disable(struct regulator *regulator)
2270{
2271 struct regulator_dev *rdev = regulator->rdev;
2272 int ret = 0;
2273
2274 if (regulator->always_on)
2275 return 0;
2276
2277 mutex_lock(&rdev->mutex);
2278 ret = _regulator_disable(rdev);
2279 mutex_unlock(&rdev->mutex);
2280
2281 if (ret == 0 && rdev->supply)
2282 regulator_disable(rdev->supply);
2283
2284 return ret;
2285}
2286EXPORT_SYMBOL_GPL(regulator_disable);
2287
2288
2289static int _regulator_force_disable(struct regulator_dev *rdev)
2290{
2291 int ret = 0;
2292
2293 lockdep_assert_held_once(&rdev->mutex);
2294
2295 ret = _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
2296 REGULATOR_EVENT_PRE_DISABLE, NULL);
2297 if (ret & NOTIFY_STOP_MASK)
2298 return -EINVAL;
2299
2300 ret = _regulator_do_disable(rdev);
2301 if (ret < 0) {
2302 rdev_err(rdev, "failed to force disable\n");
2303 _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
2304 REGULATOR_EVENT_ABORT_DISABLE, NULL);
2305 return ret;
2306 }
2307
2308 _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
2309 REGULATOR_EVENT_DISABLE, NULL);
2310
2311 return 0;
2312}
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323int regulator_force_disable(struct regulator *regulator)
2324{
2325 struct regulator_dev *rdev = regulator->rdev;
2326 int ret;
2327
2328 mutex_lock(&rdev->mutex);
2329 regulator->uA_load = 0;
2330 ret = _regulator_force_disable(regulator->rdev);
2331 mutex_unlock(&rdev->mutex);
2332
2333 if (rdev->supply)
2334 while (rdev->open_count--)
2335 regulator_disable(rdev->supply);
2336
2337 return ret;
2338}
2339EXPORT_SYMBOL_GPL(regulator_force_disable);
2340
2341static void regulator_disable_work(struct work_struct *work)
2342{
2343 struct regulator_dev *rdev = container_of(work, struct regulator_dev,
2344 disable_work.work);
2345 int count, i, ret;
2346
2347 mutex_lock(&rdev->mutex);
2348
2349 BUG_ON(!rdev->deferred_disables);
2350
2351 count = rdev->deferred_disables;
2352 rdev->deferred_disables = 0;
2353
2354 for (i = 0; i < count; i++) {
2355 ret = _regulator_disable(rdev);
2356 if (ret != 0)
2357 rdev_err(rdev, "Deferred disable failed: %d\n", ret);
2358 }
2359
2360 mutex_unlock(&rdev->mutex);
2361
2362 if (rdev->supply) {
2363 for (i = 0; i < count; i++) {
2364 ret = regulator_disable(rdev->supply);
2365 if (ret != 0) {
2366 rdev_err(rdev,
2367 "Supply disable failed: %d\n", ret);
2368 }
2369 }
2370 }
2371}
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385int regulator_disable_deferred(struct regulator *regulator, int ms)
2386{
2387 struct regulator_dev *rdev = regulator->rdev;
2388
2389 if (regulator->always_on)
2390 return 0;
2391
2392 if (!ms)
2393 return regulator_disable(regulator);
2394
2395 mutex_lock(&rdev->mutex);
2396 rdev->deferred_disables++;
2397 mutex_unlock(&rdev->mutex);
2398
2399 queue_delayed_work(system_power_efficient_wq, &rdev->disable_work,
2400 msecs_to_jiffies(ms));
2401 return 0;
2402}
2403EXPORT_SYMBOL_GPL(regulator_disable_deferred);
2404
2405static int _regulator_is_enabled(struct regulator_dev *rdev)
2406{
2407
2408 if (rdev->ena_pin)
2409 return rdev->ena_gpio_state;
2410
2411
2412 if (!rdev->desc->ops->is_enabled)
2413 return 1;
2414
2415 return rdev->desc->ops->is_enabled(rdev);
2416}
2417
2418static int _regulator_list_voltage(struct regulator *regulator,
2419 unsigned selector, int lock)
2420{
2421 struct regulator_dev *rdev = regulator->rdev;
2422 const struct regulator_ops *ops = rdev->desc->ops;
2423 int ret;
2424
2425 if (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1 && !selector)
2426 return rdev->desc->fixed_uV;
2427
2428 if (ops->list_voltage) {
2429 if (selector >= rdev->desc->n_voltages)
2430 return -EINVAL;
2431 if (lock)
2432 mutex_lock(&rdev->mutex);
2433 ret = ops->list_voltage(rdev, selector);
2434 if (lock)
2435 mutex_unlock(&rdev->mutex);
2436 } else if (rdev->supply) {
2437 ret = _regulator_list_voltage(rdev->supply, selector, lock);
2438 } else {
2439 return -EINVAL;
2440 }
2441
2442 if (ret > 0) {
2443 if (ret < rdev->constraints->min_uV)
2444 ret = 0;
2445 else if (ret > rdev->constraints->max_uV)
2446 ret = 0;
2447 }
2448
2449 return ret;
2450}
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464int regulator_is_enabled(struct regulator *regulator)
2465{
2466 int ret;
2467
2468 if (regulator->always_on)
2469 return 1;
2470
2471 mutex_lock(®ulator->rdev->mutex);
2472 ret = _regulator_is_enabled(regulator->rdev);
2473 mutex_unlock(®ulator->rdev->mutex);
2474
2475 return ret;
2476}
2477EXPORT_SYMBOL_GPL(regulator_is_enabled);
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488int regulator_can_change_voltage(struct regulator *regulator)
2489{
2490 struct regulator_dev *rdev = regulator->rdev;
2491
2492 if (rdev->constraints &&
2493 (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
2494 if (rdev->desc->n_voltages - rdev->desc->linear_min_sel > 1)
2495 return 1;
2496
2497 if (rdev->desc->continuous_voltage_range &&
2498 rdev->constraints->min_uV && rdev->constraints->max_uV &&
2499 rdev->constraints->min_uV != rdev->constraints->max_uV)
2500 return 1;
2501 }
2502
2503 return 0;
2504}
2505EXPORT_SYMBOL_GPL(regulator_can_change_voltage);
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515int regulator_count_voltages(struct regulator *regulator)
2516{
2517 struct regulator_dev *rdev = regulator->rdev;
2518
2519 if (rdev->desc->n_voltages)
2520 return rdev->desc->n_voltages;
2521
2522 if (!rdev->supply)
2523 return -EINVAL;
2524
2525 return regulator_count_voltages(rdev->supply);
2526}
2527EXPORT_SYMBOL_GPL(regulator_count_voltages);
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539int regulator_list_voltage(struct regulator *regulator, unsigned selector)
2540{
2541 return _regulator_list_voltage(regulator, selector, 1);
2542}
2543EXPORT_SYMBOL_GPL(regulator_list_voltage);
2544
2545
2546
2547
2548
2549
2550
2551
2552struct regmap *regulator_get_regmap(struct regulator *regulator)
2553{
2554 struct regmap *map = regulator->rdev->regmap;
2555
2556 return map ? map : ERR_PTR(-EOPNOTSUPP);
2557}
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573int regulator_get_hardware_vsel_register(struct regulator *regulator,
2574 unsigned *vsel_reg,
2575 unsigned *vsel_mask)
2576{
2577 struct regulator_dev *rdev = regulator->rdev;
2578 const struct regulator_ops *ops = rdev->desc->ops;
2579
2580 if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)
2581 return -EOPNOTSUPP;
2582
2583 *vsel_reg = rdev->desc->vsel_reg;
2584 *vsel_mask = rdev->desc->vsel_mask;
2585
2586 return 0;
2587}
2588EXPORT_SYMBOL_GPL(regulator_get_hardware_vsel_register);
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601int regulator_list_hardware_vsel(struct regulator *regulator,
2602 unsigned selector)
2603{
2604 struct regulator_dev *rdev = regulator->rdev;
2605 const struct regulator_ops *ops = rdev->desc->ops;
2606
2607 if (selector >= rdev->desc->n_voltages)
2608 return -EINVAL;
2609 if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)
2610 return -EOPNOTSUPP;
2611
2612 return selector;
2613}
2614EXPORT_SYMBOL_GPL(regulator_list_hardware_vsel);
2615
2616
2617
2618
2619
2620
2621
2622
2623unsigned int regulator_get_linear_step(struct regulator *regulator)
2624{
2625 struct regulator_dev *rdev = regulator->rdev;
2626
2627 return rdev->desc->uV_step;
2628}
2629EXPORT_SYMBOL_GPL(regulator_get_linear_step);
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640int regulator_is_supported_voltage(struct regulator *regulator,
2641 int min_uV, int max_uV)
2642{
2643 struct regulator_dev *rdev = regulator->rdev;
2644 int i, voltages, ret;
2645
2646
2647 if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
2648 ret = regulator_get_voltage(regulator);
2649 if (ret >= 0)
2650 return min_uV <= ret && ret <= max_uV;
2651 else
2652 return ret;
2653 }
2654
2655
2656 if (rdev->desc->continuous_voltage_range)
2657 return min_uV >= rdev->constraints->min_uV &&
2658 max_uV <= rdev->constraints->max_uV;
2659
2660 ret = regulator_count_voltages(regulator);
2661 if (ret < 0)
2662 return ret;
2663 voltages = ret;
2664
2665 for (i = 0; i < voltages; i++) {
2666 ret = regulator_list_voltage(regulator, i);
2667
2668 if (ret >= min_uV && ret <= max_uV)
2669 return 1;
2670 }
2671
2672 return 0;
2673}
2674EXPORT_SYMBOL_GPL(regulator_is_supported_voltage);
2675
2676static int regulator_map_voltage(struct regulator_dev *rdev, int min_uV,
2677 int max_uV)
2678{
2679 const struct regulator_desc *desc = rdev->desc;
2680
2681 if (desc->ops->map_voltage)
2682 return desc->ops->map_voltage(rdev, min_uV, max_uV);
2683
2684 if (desc->ops->list_voltage == regulator_list_voltage_linear)
2685 return regulator_map_voltage_linear(rdev, min_uV, max_uV);
2686
2687 if (desc->ops->list_voltage == regulator_list_voltage_linear_range)
2688 return regulator_map_voltage_linear_range(rdev, min_uV, max_uV);
2689
2690 return regulator_map_voltage_iterate(rdev, min_uV, max_uV);
2691}
2692
2693static int _regulator_call_set_voltage(struct regulator_dev *rdev,
2694 int min_uV, int max_uV,
2695 unsigned *selector)
2696{
2697 struct pre_voltage_change_data data;
2698 int ret;
2699
2700 data.old_uV = _regulator_get_voltage(rdev);
2701 data.min_uV = min_uV;
2702 data.max_uV = max_uV;
2703 ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE,
2704 &data);
2705 if (ret & NOTIFY_STOP_MASK)
2706 return -EINVAL;
2707
2708 ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, selector);
2709 if (ret >= 0)
2710 return ret;
2711
2712 _notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE,
2713 (void *)data.old_uV);
2714
2715 return ret;
2716}
2717
2718static int _regulator_call_set_voltage_sel(struct regulator_dev *rdev,
2719 int uV, unsigned selector)
2720{
2721 struct pre_voltage_change_data data;
2722 int ret;
2723
2724 data.old_uV = _regulator_get_voltage(rdev);
2725 data.min_uV = uV;
2726 data.max_uV = uV;
2727 ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE,
2728 &data);
2729 if (ret & NOTIFY_STOP_MASK)
2730 return -EINVAL;
2731
2732 ret = rdev->desc->ops->set_voltage_sel(rdev, selector);
2733 if (ret >= 0)
2734 return ret;
2735
2736 _notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE,
2737 (void *)data.old_uV);
2738
2739 return ret;
2740}
2741
2742static int _regulator_do_set_voltage(struct regulator_dev *rdev,
2743 int min_uV, int max_uV)
2744{
2745 int ret;
2746 int delay = 0;
2747 int best_val = 0;
2748 unsigned int selector;
2749 int old_selector = -1;
2750
2751 trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV);
2752
2753 min_uV += rdev->constraints->uV_offset;
2754 max_uV += rdev->constraints->uV_offset;
2755
2756
2757
2758
2759
2760 if (_regulator_is_enabled(rdev) &&
2761 rdev->desc->ops->set_voltage_time_sel &&
2762 rdev->desc->ops->get_voltage_sel) {
2763 old_selector = rdev->desc->ops->get_voltage_sel(rdev);
2764 if (old_selector < 0)
2765 return old_selector;
2766 }
2767
2768 if (rdev->desc->ops->set_voltage) {
2769 ret = _regulator_call_set_voltage(rdev, min_uV, max_uV,
2770 &selector);
2771
2772 if (ret >= 0) {
2773 if (rdev->desc->ops->list_voltage)
2774 best_val = rdev->desc->ops->list_voltage(rdev,
2775 selector);
2776 else
2777 best_val = _regulator_get_voltage(rdev);
2778 }
2779
2780 } else if (rdev->desc->ops->set_voltage_sel) {
2781 ret = regulator_map_voltage(rdev, min_uV, max_uV);
2782 if (ret >= 0) {
2783 best_val = rdev->desc->ops->list_voltage(rdev, ret);
2784 if (min_uV <= best_val && max_uV >= best_val) {
2785 selector = ret;
2786 if (old_selector == selector)
2787 ret = 0;
2788 else
2789 ret = _regulator_call_set_voltage_sel(
2790 rdev, best_val, selector);
2791 } else {
2792 ret = -EINVAL;
2793 }
2794 }
2795 } else {
2796 ret = -EINVAL;
2797 }
2798
2799
2800 if (ret == 0 && !rdev->constraints->ramp_disable && old_selector >= 0
2801 && old_selector != selector) {
2802
2803 delay = rdev->desc->ops->set_voltage_time_sel(rdev,
2804 old_selector, selector);
2805 if (delay < 0) {
2806 rdev_warn(rdev, "set_voltage_time_sel() failed: %d\n",
2807 delay);
2808 delay = 0;
2809 }
2810
2811
2812 if (delay >= 1000) {
2813 mdelay(delay / 1000);
2814 udelay(delay % 1000);
2815 } else if (delay) {
2816 udelay(delay);
2817 }
2818 }
2819
2820 if (ret == 0 && best_val >= 0) {
2821 unsigned long data = best_val;
2822
2823 _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE,
2824 (void *)data);
2825 }
2826
2827 trace_regulator_set_voltage_complete(rdev_get_name(rdev), best_val);
2828
2829 return ret;
2830}
2831
2832static int regulator_set_voltage_unlocked(struct regulator *regulator,
2833 int min_uV, int max_uV)
2834{
2835 struct regulator_dev *rdev = regulator->rdev;
2836 int ret = 0;
2837 int old_min_uV, old_max_uV;
2838 int current_uV;
2839 int best_supply_uV = 0;
2840 int supply_change_uV = 0;
2841
2842
2843
2844
2845
2846 if (regulator->min_uV == min_uV && regulator->max_uV == max_uV)
2847 goto out;
2848
2849
2850
2851
2852
2853 if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
2854 current_uV = _regulator_get_voltage(rdev);
2855 if (min_uV <= current_uV && current_uV <= max_uV) {
2856 regulator->min_uV = min_uV;
2857 regulator->max_uV = max_uV;
2858 goto out;
2859 }
2860 }
2861
2862
2863 if (!rdev->desc->ops->set_voltage &&
2864 !rdev->desc->ops->set_voltage_sel) {
2865 ret = -EINVAL;
2866 goto out;
2867 }
2868
2869
2870 ret = regulator_check_voltage(rdev, &min_uV, &max_uV);
2871 if (ret < 0)
2872 goto out;
2873
2874
2875 old_min_uV = regulator->min_uV;
2876 old_max_uV = regulator->max_uV;
2877 regulator->min_uV = min_uV;
2878 regulator->max_uV = max_uV;
2879
2880 ret = regulator_check_consumers(rdev, &min_uV, &max_uV);
2881 if (ret < 0)
2882 goto out2;
2883
2884 if (rdev->supply && (rdev->desc->min_dropout_uV ||
2885 !rdev->desc->ops->get_voltage)) {
2886 int current_supply_uV;
2887 int selector;
2888
2889 selector = regulator_map_voltage(rdev, min_uV, max_uV);
2890 if (selector < 0) {
2891 ret = selector;
2892 goto out2;
2893 }
2894
2895 best_supply_uV = _regulator_list_voltage(regulator, selector, 0);
2896 if (best_supply_uV < 0) {
2897 ret = best_supply_uV;
2898 goto out2;
2899 }
2900
2901 best_supply_uV += rdev->desc->min_dropout_uV;
2902
2903 current_supply_uV = _regulator_get_voltage(rdev->supply->rdev);
2904 if (current_supply_uV < 0) {
2905 ret = current_supply_uV;
2906 goto out2;
2907 }
2908
2909 supply_change_uV = best_supply_uV - current_supply_uV;
2910 }
2911
2912 if (supply_change_uV > 0) {
2913 ret = regulator_set_voltage_unlocked(rdev->supply,
2914 best_supply_uV, INT_MAX);
2915 if (ret) {
2916 dev_err(&rdev->dev, "Failed to increase supply voltage: %d\n",
2917 ret);
2918 goto out2;
2919 }
2920 }
2921
2922 ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
2923 if (ret < 0)
2924 goto out2;
2925
2926 if (supply_change_uV < 0) {
2927 ret = regulator_set_voltage_unlocked(rdev->supply,
2928 best_supply_uV, INT_MAX);
2929 if (ret)
2930 dev_warn(&rdev->dev, "Failed to decrease supply voltage: %d\n",
2931 ret);
2932
2933 ret = 0;
2934 }
2935
2936out:
2937 return ret;
2938out2:
2939 regulator->min_uV = old_min_uV;
2940 regulator->max_uV = old_max_uV;
2941
2942 return ret;
2943}
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
2964{
2965 int ret = 0;
2966
2967 regulator_lock_supply(regulator->rdev);
2968
2969 ret = regulator_set_voltage_unlocked(regulator, min_uV, max_uV);
2970
2971 regulator_unlock_supply(regulator->rdev);
2972
2973 return ret;
2974}
2975EXPORT_SYMBOL_GPL(regulator_set_voltage);
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987int regulator_set_voltage_time(struct regulator *regulator,
2988 int old_uV, int new_uV)
2989{
2990 struct regulator_dev *rdev = regulator->rdev;
2991 const struct regulator_ops *ops = rdev->desc->ops;
2992 int old_sel = -1;
2993 int new_sel = -1;
2994 int voltage;
2995 int i;
2996
2997
2998 if (!ops->list_voltage || !ops->set_voltage_time_sel
2999 || !rdev->desc->n_voltages)
3000 return -EINVAL;
3001
3002 for (i = 0; i < rdev->desc->n_voltages; i++) {
3003
3004 voltage = regulator_list_voltage(regulator, i);
3005 if (voltage < 0)
3006 return -EINVAL;
3007 if (voltage == 0)
3008 continue;
3009 if (voltage == old_uV)
3010 old_sel = i;
3011 if (voltage == new_uV)
3012 new_sel = i;
3013 }
3014
3015 if (old_sel < 0 || new_sel < 0)
3016 return -EINVAL;
3017
3018 return ops->set_voltage_time_sel(rdev, old_sel, new_sel);
3019}
3020EXPORT_SYMBOL_GPL(regulator_set_voltage_time);
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
3035 unsigned int old_selector,
3036 unsigned int new_selector)
3037{
3038 unsigned int ramp_delay = 0;
3039 int old_volt, new_volt;
3040
3041 if (rdev->constraints->ramp_delay)
3042 ramp_delay = rdev->constraints->ramp_delay;
3043 else if (rdev->desc->ramp_delay)
3044 ramp_delay = rdev->desc->ramp_delay;
3045
3046 if (ramp_delay == 0) {
3047 rdev_warn(rdev, "ramp_delay not set\n");
3048 return 0;
3049 }
3050
3051
3052 if (!rdev->desc->ops->list_voltage)
3053 return -EINVAL;
3054
3055 old_volt = rdev->desc->ops->list_voltage(rdev, old_selector);
3056 new_volt = rdev->desc->ops->list_voltage(rdev, new_selector);
3057
3058 return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
3059}
3060EXPORT_SYMBOL_GPL(regulator_set_voltage_time_sel);
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070int regulator_sync_voltage(struct regulator *regulator)
3071{
3072 struct regulator_dev *rdev = regulator->rdev;
3073 int ret, min_uV, max_uV;
3074
3075 mutex_lock(&rdev->mutex);
3076
3077 if (!rdev->desc->ops->set_voltage &&
3078 !rdev->desc->ops->set_voltage_sel) {
3079 ret = -EINVAL;
3080 goto out;
3081 }
3082
3083
3084 if (!regulator->min_uV && !regulator->max_uV) {
3085 ret = -EINVAL;
3086 goto out;
3087 }
3088
3089 min_uV = regulator->min_uV;
3090 max_uV = regulator->max_uV;
3091
3092
3093 ret = regulator_check_voltage(rdev, &min_uV, &max_uV);
3094 if (ret < 0)
3095 goto out;
3096
3097 ret = regulator_check_consumers(rdev, &min_uV, &max_uV);
3098 if (ret < 0)
3099 goto out;
3100
3101 ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
3102
3103out:
3104 mutex_unlock(&rdev->mutex);
3105 return ret;
3106}
3107EXPORT_SYMBOL_GPL(regulator_sync_voltage);
3108
3109static int _regulator_get_voltage(struct regulator_dev *rdev)
3110{
3111 int sel, ret;
3112
3113 if (rdev->desc->ops->get_voltage_sel) {
3114 sel = rdev->desc->ops->get_voltage_sel(rdev);
3115 if (sel < 0)
3116 return sel;
3117 ret = rdev->desc->ops->list_voltage(rdev, sel);
3118 } else if (rdev->desc->ops->get_voltage) {
3119 ret = rdev->desc->ops->get_voltage(rdev);
3120 } else if (rdev->desc->ops->list_voltage) {
3121 ret = rdev->desc->ops->list_voltage(rdev, 0);
3122 } else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) {
3123 ret = rdev->desc->fixed_uV;
3124 } else if (rdev->supply) {
3125 ret = _regulator_get_voltage(rdev->supply->rdev);
3126 } else {
3127 return -EINVAL;
3128 }
3129
3130 if (ret < 0)
3131 return ret;
3132 return ret - rdev->constraints->uV_offset;
3133}
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144int regulator_get_voltage(struct regulator *regulator)
3145{
3146 int ret;
3147
3148 regulator_lock_supply(regulator->rdev);
3149
3150 ret = _regulator_get_voltage(regulator->rdev);
3151
3152 regulator_unlock_supply(regulator->rdev);
3153
3154 return ret;
3155}
3156EXPORT_SYMBOL_GPL(regulator_get_voltage);
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174int regulator_set_current_limit(struct regulator *regulator,
3175 int min_uA, int max_uA)
3176{
3177 struct regulator_dev *rdev = regulator->rdev;
3178 int ret;
3179
3180 mutex_lock(&rdev->mutex);
3181
3182
3183 if (!rdev->desc->ops->set_current_limit) {
3184 ret = -EINVAL;
3185 goto out;
3186 }
3187
3188
3189 ret = regulator_check_current_limit(rdev, &min_uA, &max_uA);
3190 if (ret < 0)
3191 goto out;
3192
3193 ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA);
3194out:
3195 mutex_unlock(&rdev->mutex);
3196 return ret;
3197}
3198EXPORT_SYMBOL_GPL(regulator_set_current_limit);
3199
3200static int _regulator_get_current_limit(struct regulator_dev *rdev)
3201{
3202 int ret;
3203
3204 mutex_lock(&rdev->mutex);
3205
3206
3207 if (!rdev->desc->ops->get_current_limit) {
3208 ret = -EINVAL;
3209 goto out;
3210 }
3211
3212 ret = rdev->desc->ops->get_current_limit(rdev);
3213out:
3214 mutex_unlock(&rdev->mutex);
3215 return ret;
3216}
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227int regulator_get_current_limit(struct regulator *regulator)
3228{
3229 return _regulator_get_current_limit(regulator->rdev);
3230}
3231EXPORT_SYMBOL_GPL(regulator_get_current_limit);
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244int regulator_set_mode(struct regulator *regulator, unsigned int mode)
3245{
3246 struct regulator_dev *rdev = regulator->rdev;
3247 int ret;
3248 int regulator_curr_mode;
3249
3250 mutex_lock(&rdev->mutex);
3251
3252
3253 if (!rdev->desc->ops->set_mode) {
3254 ret = -EINVAL;
3255 goto out;
3256 }
3257
3258
3259 if (rdev->desc->ops->get_mode) {
3260 regulator_curr_mode = rdev->desc->ops->get_mode(rdev);
3261 if (regulator_curr_mode == mode) {
3262 ret = 0;
3263 goto out;
3264 }
3265 }
3266
3267
3268 ret = regulator_mode_constrain(rdev, &mode);
3269 if (ret < 0)
3270 goto out;
3271
3272 ret = rdev->desc->ops->set_mode(rdev, mode);
3273out:
3274 mutex_unlock(&rdev->mutex);
3275 return ret;
3276}
3277EXPORT_SYMBOL_GPL(regulator_set_mode);
3278
3279static unsigned int _regulator_get_mode(struct regulator_dev *rdev)
3280{
3281 int ret;
3282
3283 mutex_lock(&rdev->mutex);
3284
3285
3286 if (!rdev->desc->ops->get_mode) {
3287 ret = -EINVAL;
3288 goto out;
3289 }
3290
3291 ret = rdev->desc->ops->get_mode(rdev);
3292out:
3293 mutex_unlock(&rdev->mutex);
3294 return ret;
3295}
3296
3297
3298
3299
3300
3301
3302
3303unsigned int regulator_get_mode(struct regulator *regulator)
3304{
3305 return _regulator_get_mode(regulator->rdev);
3306}
3307EXPORT_SYMBOL_GPL(regulator_get_mode);
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335int regulator_set_load(struct regulator *regulator, int uA_load)
3336{
3337 struct regulator_dev *rdev = regulator->rdev;
3338 int ret;
3339
3340 mutex_lock(&rdev->mutex);
3341 regulator->uA_load = uA_load;
3342 ret = drms_uA_update(rdev);
3343 mutex_unlock(&rdev->mutex);
3344
3345 return ret;
3346}
3347EXPORT_SYMBOL_GPL(regulator_set_load);
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360int regulator_allow_bypass(struct regulator *regulator, bool enable)
3361{
3362 struct regulator_dev *rdev = regulator->rdev;
3363 int ret = 0;
3364
3365 if (!rdev->desc->ops->set_bypass)
3366 return 0;
3367
3368 if (rdev->constraints &&
3369 !(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_BYPASS))
3370 return 0;
3371
3372 mutex_lock(&rdev->mutex);
3373
3374 if (enable && !regulator->bypass) {
3375 rdev->bypass_count++;
3376
3377 if (rdev->bypass_count == rdev->open_count) {
3378 ret = rdev->desc->ops->set_bypass(rdev, enable);
3379 if (ret != 0)
3380 rdev->bypass_count--;
3381 }
3382
3383 } else if (!enable && regulator->bypass) {
3384 rdev->bypass_count--;
3385
3386 if (rdev->bypass_count != rdev->open_count) {
3387 ret = rdev->desc->ops->set_bypass(rdev, enable);
3388 if (ret != 0)
3389 rdev->bypass_count++;
3390 }
3391 }
3392
3393 if (ret == 0)
3394 regulator->bypass = enable;
3395
3396 mutex_unlock(&rdev->mutex);
3397
3398 return ret;
3399}
3400EXPORT_SYMBOL_GPL(regulator_allow_bypass);
3401
3402
3403
3404
3405
3406
3407
3408
3409int regulator_register_notifier(struct regulator *regulator,
3410 struct notifier_block *nb)
3411{
3412 return blocking_notifier_chain_register(®ulator->rdev->notifier,
3413 nb);
3414}
3415EXPORT_SYMBOL_GPL(regulator_register_notifier);
3416
3417
3418
3419
3420
3421
3422
3423
3424int regulator_unregister_notifier(struct regulator *regulator,
3425 struct notifier_block *nb)
3426{
3427 return blocking_notifier_chain_unregister(®ulator->rdev->notifier,
3428 nb);
3429}
3430EXPORT_SYMBOL_GPL(regulator_unregister_notifier);
3431
3432
3433
3434
3435static int _notifier_call_chain(struct regulator_dev *rdev,
3436 unsigned long event, void *data)
3437{
3438
3439 return blocking_notifier_call_chain(&rdev->notifier, event, data);
3440}
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456int regulator_bulk_get(struct device *dev, int num_consumers,
3457 struct regulator_bulk_data *consumers)
3458{
3459 int i;
3460 int ret;
3461
3462 for (i = 0; i < num_consumers; i++)
3463 consumers[i].consumer = NULL;
3464
3465 for (i = 0; i < num_consumers; i++) {
3466 consumers[i].consumer = _regulator_get(dev,
3467 consumers[i].supply,
3468 false,
3469 !consumers[i].optional);
3470 if (IS_ERR(consumers[i].consumer)) {
3471 ret = PTR_ERR(consumers[i].consumer);
3472 dev_err(dev, "Failed to get supply '%s': %d\n",
3473 consumers[i].supply, ret);
3474 consumers[i].consumer = NULL;
3475 goto err;
3476 }
3477 }
3478
3479 return 0;
3480
3481err:
3482 while (--i >= 0)
3483 regulator_put(consumers[i].consumer);
3484
3485 return ret;
3486}
3487EXPORT_SYMBOL_GPL(regulator_bulk_get);
3488
3489static void regulator_bulk_enable_async(void *data, async_cookie_t cookie)
3490{
3491 struct regulator_bulk_data *bulk = data;
3492
3493 bulk->ret = regulator_enable(bulk->consumer);
3494}
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508int regulator_bulk_enable(int num_consumers,
3509 struct regulator_bulk_data *consumers)
3510{
3511 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
3512 int i;
3513 int ret = 0;
3514
3515 for (i = 0; i < num_consumers; i++) {
3516 if (consumers[i].consumer->always_on)
3517 consumers[i].ret = 0;
3518 else
3519 async_schedule_domain(regulator_bulk_enable_async,
3520 &consumers[i], &async_domain);
3521 }
3522
3523 async_synchronize_full_domain(&async_domain);
3524
3525
3526 for (i = 0; i < num_consumers; i++) {
3527 if (consumers[i].ret != 0) {
3528 ret = consumers[i].ret;
3529 goto err;
3530 }
3531 }
3532
3533 return 0;
3534
3535err:
3536 for (i = 0; i < num_consumers; i++) {
3537 if (consumers[i].ret < 0)
3538 pr_err("Failed to enable %s: %d\n", consumers[i].supply,
3539 consumers[i].ret);
3540 else
3541 regulator_disable(consumers[i].consumer);
3542 }
3543
3544 return ret;
3545}
3546EXPORT_SYMBOL_GPL(regulator_bulk_enable);
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560int regulator_bulk_disable(int num_consumers,
3561 struct regulator_bulk_data *consumers)
3562{
3563 int i;
3564 int ret, r;
3565
3566 for (i = num_consumers - 1; i >= 0; --i) {
3567 ret = regulator_disable(consumers[i].consumer);
3568 if (ret != 0)
3569 goto err;
3570 }
3571
3572 return 0;
3573
3574err:
3575 pr_err("Failed to disable %s: %d\n", consumers[i].supply, ret);
3576 for (++i; i < num_consumers; ++i) {
3577 r = regulator_enable(consumers[i].consumer);
3578 if (r != 0)
3579 pr_err("Failed to reename %s: %d\n",
3580 consumers[i].supply, r);
3581 }
3582
3583 return ret;
3584}
3585EXPORT_SYMBOL_GPL(regulator_bulk_disable);
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601int regulator_bulk_force_disable(int num_consumers,
3602 struct regulator_bulk_data *consumers)
3603{
3604 int i;
3605 int ret;
3606
3607 for (i = 0; i < num_consumers; i++)
3608 consumers[i].ret =
3609 regulator_force_disable(consumers[i].consumer);
3610
3611 for (i = 0; i < num_consumers; i++) {
3612 if (consumers[i].ret != 0) {
3613 ret = consumers[i].ret;
3614 goto out;
3615 }
3616 }
3617
3618 return 0;
3619out:
3620 return ret;
3621}
3622EXPORT_SYMBOL_GPL(regulator_bulk_force_disable);
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633void regulator_bulk_free(int num_consumers,
3634 struct regulator_bulk_data *consumers)
3635{
3636 int i;
3637
3638 for (i = 0; i < num_consumers; i++) {
3639 regulator_put(consumers[i].consumer);
3640 consumers[i].consumer = NULL;
3641 }
3642}
3643EXPORT_SYMBOL_GPL(regulator_bulk_free);
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655int regulator_notifier_call_chain(struct regulator_dev *rdev,
3656 unsigned long event, void *data)
3657{
3658 lockdep_assert_held_once(&rdev->mutex);
3659
3660 _notifier_call_chain(rdev, event, data);
3661 return NOTIFY_DONE;
3662
3663}
3664EXPORT_SYMBOL_GPL(regulator_notifier_call_chain);
3665
3666
3667
3668
3669
3670
3671
3672
3673int regulator_mode_to_status(unsigned int mode)
3674{
3675 switch (mode) {
3676 case REGULATOR_MODE_FAST:
3677 return REGULATOR_STATUS_FAST;
3678 case REGULATOR_MODE_NORMAL:
3679 return REGULATOR_STATUS_NORMAL;
3680 case REGULATOR_MODE_IDLE:
3681 return REGULATOR_STATUS_IDLE;
3682 case REGULATOR_MODE_STANDBY:
3683 return REGULATOR_STATUS_STANDBY;
3684 default:
3685 return REGULATOR_STATUS_UNDEFINED;
3686 }
3687}
3688EXPORT_SYMBOL_GPL(regulator_mode_to_status);
3689
3690static struct attribute *regulator_dev_attrs[] = {
3691 &dev_attr_name.attr,
3692 &dev_attr_num_users.attr,
3693 &dev_attr_type.attr,
3694 &dev_attr_microvolts.attr,
3695 &dev_attr_microamps.attr,
3696 &dev_attr_opmode.attr,
3697 &dev_attr_state.attr,
3698 &dev_attr_status.attr,
3699 &dev_attr_bypass.attr,
3700 &dev_attr_requested_microamps.attr,
3701 &dev_attr_min_microvolts.attr,
3702 &dev_attr_max_microvolts.attr,
3703 &dev_attr_min_microamps.attr,
3704 &dev_attr_max_microamps.attr,
3705 &dev_attr_suspend_standby_state.attr,
3706 &dev_attr_suspend_mem_state.attr,
3707 &dev_attr_suspend_disk_state.attr,
3708 &dev_attr_suspend_standby_microvolts.attr,
3709 &dev_attr_suspend_mem_microvolts.attr,
3710 &dev_attr_suspend_disk_microvolts.attr,
3711 &dev_attr_suspend_standby_mode.attr,
3712 &dev_attr_suspend_mem_mode.attr,
3713 &dev_attr_suspend_disk_mode.attr,
3714 NULL
3715};
3716
3717
3718
3719
3720
3721static umode_t regulator_attr_is_visible(struct kobject *kobj,
3722 struct attribute *attr, int idx)
3723{
3724 struct device *dev = kobj_to_dev(kobj);
3725 struct regulator_dev *rdev = dev_to_rdev(dev);
3726 const struct regulator_ops *ops = rdev->desc->ops;
3727 umode_t mode = attr->mode;
3728
3729
3730 if (attr == &dev_attr_name.attr ||
3731 attr == &dev_attr_num_users.attr ||
3732 attr == &dev_attr_type.attr)
3733 return mode;
3734
3735
3736 if (attr == &dev_attr_microvolts.attr) {
3737 if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
3738 (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) ||
3739 (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0) ||
3740 (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1))
3741 return mode;
3742 return 0;
3743 }
3744
3745 if (attr == &dev_attr_microamps.attr)
3746 return ops->get_current_limit ? mode : 0;
3747
3748 if (attr == &dev_attr_opmode.attr)
3749 return ops->get_mode ? mode : 0;
3750
3751 if (attr == &dev_attr_state.attr)
3752 return (rdev->ena_pin || ops->is_enabled) ? mode : 0;
3753
3754 if (attr == &dev_attr_status.attr)
3755 return ops->get_status ? mode : 0;
3756
3757 if (attr == &dev_attr_bypass.attr)
3758 return ops->get_bypass ? mode : 0;
3759
3760
3761 if (attr == &dev_attr_requested_microamps.attr)
3762 return rdev->desc->type == REGULATOR_CURRENT ? mode : 0;
3763
3764
3765 if (attr == &dev_attr_min_microvolts.attr ||
3766 attr == &dev_attr_max_microvolts.attr)
3767 return (ops->set_voltage || ops->set_voltage_sel) ? mode : 0;
3768
3769 if (attr == &dev_attr_min_microamps.attr ||
3770 attr == &dev_attr_max_microamps.attr)
3771 return ops->set_current_limit ? mode : 0;
3772
3773 if (attr == &dev_attr_suspend_standby_state.attr ||
3774 attr == &dev_attr_suspend_mem_state.attr ||
3775 attr == &dev_attr_suspend_disk_state.attr)
3776 return mode;
3777
3778 if (attr == &dev_attr_suspend_standby_microvolts.attr ||
3779 attr == &dev_attr_suspend_mem_microvolts.attr ||
3780 attr == &dev_attr_suspend_disk_microvolts.attr)
3781 return ops->set_suspend_voltage ? mode : 0;
3782
3783 if (attr == &dev_attr_suspend_standby_mode.attr ||
3784 attr == &dev_attr_suspend_mem_mode.attr ||
3785 attr == &dev_attr_suspend_disk_mode.attr)
3786 return ops->set_suspend_mode ? mode : 0;
3787
3788 return mode;
3789}
3790
3791static const struct attribute_group regulator_dev_group = {
3792 .attrs = regulator_dev_attrs,
3793 .is_visible = regulator_attr_is_visible,
3794};
3795
3796static const struct attribute_group *regulator_dev_groups[] = {
3797 ®ulator_dev_group,
3798 NULL
3799};
3800
3801static void regulator_dev_release(struct device *dev)
3802{
3803 struct regulator_dev *rdev = dev_get_drvdata(dev);
3804
3805 kfree(rdev->constraints);
3806 of_node_put(rdev->dev.of_node);
3807 kfree(rdev);
3808}
3809
3810static struct class regulator_class = {
3811 .name = "regulator",
3812 .dev_release = regulator_dev_release,
3813 .dev_groups = regulator_dev_groups,
3814};
3815
3816static void rdev_init_debugfs(struct regulator_dev *rdev)
3817{
3818 struct device *parent = rdev->dev.parent;
3819 const char *rname = rdev_get_name(rdev);
3820 char name[NAME_MAX];
3821
3822
3823 if (parent && rname == rdev->desc->name) {
3824 snprintf(name, sizeof(name), "%s-%s", dev_name(parent),
3825 rname);
3826 rname = name;
3827 }
3828
3829 rdev->debugfs = debugfs_create_dir(rname, debugfs_root);
3830 if (!rdev->debugfs) {
3831 rdev_warn(rdev, "Failed to create debugfs directory\n");
3832 return;
3833 }
3834
3835 debugfs_create_u32("use_count", 0444, rdev->debugfs,
3836 &rdev->use_count);
3837 debugfs_create_u32("open_count", 0444, rdev->debugfs,
3838 &rdev->open_count);
3839 debugfs_create_u32("bypass_count", 0444, rdev->debugfs,
3840 &rdev->bypass_count);
3841}
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852struct regulator_dev *
3853regulator_register(const struct regulator_desc *regulator_desc,
3854 const struct regulator_config *cfg)
3855{
3856 const struct regulation_constraints *constraints = NULL;
3857 const struct regulator_init_data *init_data;
3858 struct regulator_config *config = NULL;
3859 static atomic_t regulator_no = ATOMIC_INIT(-1);
3860 struct regulator_dev *rdev;
3861 struct device *dev;
3862 int ret, i;
3863
3864 if (regulator_desc == NULL || cfg == NULL)
3865 return ERR_PTR(-EINVAL);
3866
3867 dev = cfg->dev;
3868 WARN_ON(!dev);
3869
3870 if (regulator_desc->name == NULL || regulator_desc->ops == NULL)
3871 return ERR_PTR(-EINVAL);
3872
3873 if (regulator_desc->type != REGULATOR_VOLTAGE &&
3874 regulator_desc->type != REGULATOR_CURRENT)
3875 return ERR_PTR(-EINVAL);
3876
3877
3878 WARN_ON(regulator_desc->ops->get_voltage &&
3879 regulator_desc->ops->get_voltage_sel);
3880 WARN_ON(regulator_desc->ops->set_voltage &&
3881 regulator_desc->ops->set_voltage_sel);
3882
3883
3884 if (regulator_desc->ops->get_voltage_sel &&
3885 !regulator_desc->ops->list_voltage) {
3886 return ERR_PTR(-EINVAL);
3887 }
3888 if (regulator_desc->ops->set_voltage_sel &&
3889 !regulator_desc->ops->list_voltage) {
3890 return ERR_PTR(-EINVAL);
3891 }
3892
3893 rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL);
3894 if (rdev == NULL)
3895 return ERR_PTR(-ENOMEM);
3896
3897
3898
3899
3900
3901 config = kmemdup(cfg, sizeof(*cfg), GFP_KERNEL);
3902 if (config == NULL) {
3903 kfree(rdev);
3904 return ERR_PTR(-ENOMEM);
3905 }
3906
3907 init_data = regulator_of_get_init_data(dev, regulator_desc, config,
3908 &rdev->dev.of_node);
3909 if (!init_data) {
3910 init_data = config->init_data;
3911 rdev->dev.of_node = of_node_get(config->of_node);
3912 }
3913
3914 mutex_lock(®ulator_list_mutex);
3915
3916 mutex_init(&rdev->mutex);
3917 rdev->reg_data = config->driver_data;
3918 rdev->owner = regulator_desc->owner;
3919 rdev->desc = regulator_desc;
3920 if (config->regmap)
3921 rdev->regmap = config->regmap;
3922 else if (dev_get_regmap(dev, NULL))
3923 rdev->regmap = dev_get_regmap(dev, NULL);
3924 else if (dev->parent)
3925 rdev->regmap = dev_get_regmap(dev->parent, NULL);
3926 INIT_LIST_HEAD(&rdev->consumer_list);
3927 INIT_LIST_HEAD(&rdev->list);
3928 BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier);
3929 INIT_DELAYED_WORK(&rdev->disable_work, regulator_disable_work);
3930
3931
3932 if (init_data && init_data->regulator_init) {
3933 ret = init_data->regulator_init(rdev->reg_data);
3934 if (ret < 0)
3935 goto clean;
3936 }
3937
3938 if ((config->ena_gpio || config->ena_gpio_initialized) &&
3939 gpio_is_valid(config->ena_gpio)) {
3940 ret = regulator_ena_gpio_request(rdev, config);
3941 if (ret != 0) {
3942 rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
3943 config->ena_gpio, ret);
3944 goto clean;
3945 }
3946 }
3947
3948
3949 rdev->dev.class = ®ulator_class;
3950 rdev->dev.parent = dev;
3951 dev_set_name(&rdev->dev, "regulator.%lu",
3952 (unsigned long) atomic_inc_return(®ulator_no));
3953 ret = device_register(&rdev->dev);
3954 if (ret != 0) {
3955 put_device(&rdev->dev);
3956 goto wash;
3957 }
3958
3959 dev_set_drvdata(&rdev->dev, rdev);
3960
3961
3962 if (init_data)
3963 constraints = &init_data->constraints;
3964
3965 ret = set_machine_constraints(rdev, constraints);
3966 if (ret < 0)
3967 goto scrub;
3968
3969 if (init_data && init_data->supply_regulator)
3970 rdev->supply_name = init_data->supply_regulator;
3971 else if (regulator_desc->supply_name)
3972 rdev->supply_name = regulator_desc->supply_name;
3973
3974
3975 if (init_data) {
3976 for (i = 0; i < init_data->num_consumer_supplies; i++) {
3977 ret = set_consumer_device_supply(rdev,
3978 init_data->consumer_supplies[i].dev_name,
3979 init_data->consumer_supplies[i].supply);
3980 if (ret < 0) {
3981 dev_err(dev, "Failed to set supply %s\n",
3982 init_data->consumer_supplies[i].supply);
3983 goto unset_supplies;
3984 }
3985 }
3986 }
3987
3988 rdev_init_debugfs(rdev);
3989out:
3990 mutex_unlock(®ulator_list_mutex);
3991 kfree(config);
3992 return rdev;
3993
3994unset_supplies:
3995 unset_regulator_supplies(rdev);
3996
3997scrub:
3998 regulator_ena_gpio_free(rdev);
3999 device_unregister(&rdev->dev);
4000
4001 rdev = ERR_PTR(ret);
4002 goto out;
4003
4004wash:
4005 regulator_ena_gpio_free(rdev);
4006clean:
4007 kfree(rdev);
4008 rdev = ERR_PTR(ret);
4009 goto out;
4010}
4011EXPORT_SYMBOL_GPL(regulator_register);
4012
4013
4014
4015
4016
4017
4018
4019void regulator_unregister(struct regulator_dev *rdev)
4020{
4021 if (rdev == NULL)
4022 return;
4023
4024 if (rdev->supply) {
4025 while (rdev->use_count--)
4026 regulator_disable(rdev->supply);
4027 regulator_put(rdev->supply);
4028 }
4029 mutex_lock(®ulator_list_mutex);
4030 debugfs_remove_recursive(rdev->debugfs);
4031 flush_work(&rdev->disable_work.work);
4032 WARN_ON(rdev->open_count);
4033 unset_regulator_supplies(rdev);
4034 list_del(&rdev->list);
4035 mutex_unlock(®ulator_list_mutex);
4036 regulator_ena_gpio_free(rdev);
4037 device_unregister(&rdev->dev);
4038}
4039EXPORT_SYMBOL_GPL(regulator_unregister);
4040
4041static int _regulator_suspend_prepare(struct device *dev, void *data)
4042{
4043 struct regulator_dev *rdev = dev_to_rdev(dev);
4044 const suspend_state_t *state = data;
4045 int ret;
4046
4047 mutex_lock(&rdev->mutex);
4048 ret = suspend_prepare(rdev, *state);
4049 mutex_unlock(&rdev->mutex);
4050
4051 return ret;
4052}
4053
4054
4055
4056
4057
4058
4059
4060
4061int regulator_suspend_prepare(suspend_state_t state)
4062{
4063
4064 if (state == PM_SUSPEND_ON)
4065 return -EINVAL;
4066
4067 return class_for_each_device(®ulator_class, NULL, &state,
4068 _regulator_suspend_prepare);
4069}
4070EXPORT_SYMBOL_GPL(regulator_suspend_prepare);
4071
4072static int _regulator_suspend_finish(struct device *dev, void *data)
4073{
4074 struct regulator_dev *rdev = dev_to_rdev(dev);
4075 int ret;
4076
4077 mutex_lock(&rdev->mutex);
4078 if (rdev->use_count > 0 || rdev->constraints->always_on) {
4079 if (!_regulator_is_enabled(rdev)) {
4080 ret = _regulator_do_enable(rdev);
4081 if (ret)
4082 dev_err(dev,
4083 "Failed to resume regulator %d\n",
4084 ret);
4085 }
4086 } else {
4087 if (!have_full_constraints())
4088 goto unlock;
4089 if (!_regulator_is_enabled(rdev))
4090 goto unlock;
4091
4092 ret = _regulator_do_disable(rdev);
4093 if (ret)
4094 dev_err(dev, "Failed to suspend regulator %d\n", ret);
4095 }
4096unlock:
4097 mutex_unlock(&rdev->mutex);
4098
4099
4100 return 0;
4101}
4102
4103
4104
4105
4106
4107
4108
4109int regulator_suspend_finish(void)
4110{
4111 return class_for_each_device(®ulator_class, NULL, NULL,
4112 _regulator_suspend_finish);
4113}
4114EXPORT_SYMBOL_GPL(regulator_suspend_finish);
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127void regulator_has_full_constraints(void)
4128{
4129 has_full_constraints = 1;
4130}
4131EXPORT_SYMBOL_GPL(regulator_has_full_constraints);
4132
4133
4134
4135
4136
4137
4138
4139
4140void *rdev_get_drvdata(struct regulator_dev *rdev)
4141{
4142 return rdev->reg_data;
4143}
4144EXPORT_SYMBOL_GPL(rdev_get_drvdata);
4145
4146
4147
4148
4149
4150
4151
4152
4153void *regulator_get_drvdata(struct regulator *regulator)
4154{
4155 return regulator->rdev->reg_data;
4156}
4157EXPORT_SYMBOL_GPL(regulator_get_drvdata);
4158
4159
4160
4161
4162
4163
4164void regulator_set_drvdata(struct regulator *regulator, void *data)
4165{
4166 regulator->rdev->reg_data = data;
4167}
4168EXPORT_SYMBOL_GPL(regulator_set_drvdata);
4169
4170
4171
4172
4173
4174int rdev_get_id(struct regulator_dev *rdev)
4175{
4176 return rdev->desc->id;
4177}
4178EXPORT_SYMBOL_GPL(rdev_get_id);
4179
4180struct device *rdev_get_dev(struct regulator_dev *rdev)
4181{
4182 return &rdev->dev;
4183}
4184EXPORT_SYMBOL_GPL(rdev_get_dev);
4185
4186void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data)
4187{
4188 return reg_init_data->driver_data;
4189}
4190EXPORT_SYMBOL_GPL(regulator_get_init_drvdata);
4191
4192#ifdef CONFIG_DEBUG_FS
4193static ssize_t supply_map_read_file(struct file *file, char __user *user_buf,
4194 size_t count, loff_t *ppos)
4195{
4196 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
4197 ssize_t len, ret = 0;
4198 struct regulator_map *map;
4199
4200 if (!buf)
4201 return -ENOMEM;
4202
4203 list_for_each_entry(map, ®ulator_map_list, list) {
4204 len = snprintf(buf + ret, PAGE_SIZE - ret,
4205 "%s -> %s.%s\n",
4206 rdev_get_name(map->regulator), map->dev_name,
4207 map->supply);
4208 if (len >= 0)
4209 ret += len;
4210 if (ret > PAGE_SIZE) {
4211 ret = PAGE_SIZE;
4212 break;
4213 }
4214 }
4215
4216 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
4217
4218 kfree(buf);
4219
4220 return ret;
4221}
4222#endif
4223
4224static const struct file_operations supply_map_fops = {
4225#ifdef CONFIG_DEBUG_FS
4226 .read = supply_map_read_file,
4227 .llseek = default_llseek,
4228#endif
4229};
4230
4231#ifdef CONFIG_DEBUG_FS
4232struct summary_data {
4233 struct seq_file *s;
4234 struct regulator_dev *parent;
4235 int level;
4236};
4237
4238static void regulator_summary_show_subtree(struct seq_file *s,
4239 struct regulator_dev *rdev,
4240 int level);
4241
4242static int regulator_summary_show_children(struct device *dev, void *data)
4243{
4244 struct regulator_dev *rdev = dev_to_rdev(dev);
4245 struct summary_data *summary_data = data;
4246
4247 if (rdev->supply && rdev->supply->rdev == summary_data->parent)
4248 regulator_summary_show_subtree(summary_data->s, rdev,
4249 summary_data->level + 1);
4250
4251 return 0;
4252}
4253
4254static void regulator_summary_show_subtree(struct seq_file *s,
4255 struct regulator_dev *rdev,
4256 int level)
4257{
4258 struct regulation_constraints *c;
4259 struct regulator *consumer;
4260 struct summary_data summary_data;
4261
4262 if (!rdev)
4263 return;
4264
4265 seq_printf(s, "%*s%-*s %3d %4d %6d ",
4266 level * 3 + 1, "",
4267 30 - level * 3, rdev_get_name(rdev),
4268 rdev->use_count, rdev->open_count, rdev->bypass_count);
4269
4270 seq_printf(s, "%5dmV ", _regulator_get_voltage(rdev) / 1000);
4271 seq_printf(s, "%5dmA ", _regulator_get_current_limit(rdev) / 1000);
4272
4273 c = rdev->constraints;
4274 if (c) {
4275 switch (rdev->desc->type) {
4276 case REGULATOR_VOLTAGE:
4277 seq_printf(s, "%5dmV %5dmV ",
4278 c->min_uV / 1000, c->max_uV / 1000);
4279 break;
4280 case REGULATOR_CURRENT:
4281 seq_printf(s, "%5dmA %5dmA ",
4282 c->min_uA / 1000, c->max_uA / 1000);
4283 break;
4284 }
4285 }
4286
4287 seq_puts(s, "\n");
4288
4289 list_for_each_entry(consumer, &rdev->consumer_list, list) {
4290 if (consumer->dev->class == ®ulator_class)
4291 continue;
4292
4293 seq_printf(s, "%*s%-*s ",
4294 (level + 1) * 3 + 1, "",
4295 30 - (level + 1) * 3, dev_name(consumer->dev));
4296
4297 switch (rdev->desc->type) {
4298 case REGULATOR_VOLTAGE:
4299 seq_printf(s, "%37dmV %5dmV",
4300 consumer->min_uV / 1000,
4301 consumer->max_uV / 1000);
4302 break;
4303 case REGULATOR_CURRENT:
4304 break;
4305 }
4306
4307 seq_puts(s, "\n");
4308 }
4309
4310 summary_data.s = s;
4311 summary_data.level = level;
4312 summary_data.parent = rdev;
4313
4314 class_for_each_device(®ulator_class, NULL, &summary_data,
4315 regulator_summary_show_children);
4316}
4317
4318static int regulator_summary_show_roots(struct device *dev, void *data)
4319{
4320 struct regulator_dev *rdev = dev_to_rdev(dev);
4321 struct seq_file *s = data;
4322
4323 if (!rdev->supply)
4324 regulator_summary_show_subtree(s, rdev, 0);
4325
4326 return 0;
4327}
4328
4329static int regulator_summary_show(struct seq_file *s, void *data)
4330{
4331 seq_puts(s, " regulator use open bypass voltage current min max\n");
4332 seq_puts(s, "-------------------------------------------------------------------------------\n");
4333
4334 class_for_each_device(®ulator_class, NULL, s,
4335 regulator_summary_show_roots);
4336
4337 return 0;
4338}
4339
4340static int regulator_summary_open(struct inode *inode, struct file *file)
4341{
4342 return single_open(file, regulator_summary_show, inode->i_private);
4343}
4344#endif
4345
4346static const struct file_operations regulator_summary_fops = {
4347#ifdef CONFIG_DEBUG_FS
4348 .open = regulator_summary_open,
4349 .read = seq_read,
4350 .llseek = seq_lseek,
4351 .release = single_release,
4352#endif
4353};
4354
4355static int __init regulator_init(void)
4356{
4357 int ret;
4358
4359 ret = class_register(®ulator_class);
4360
4361 debugfs_root = debugfs_create_dir("regulator", NULL);
4362 if (!debugfs_root)
4363 pr_warn("regulator: Failed to create debugfs directory\n");
4364
4365 debugfs_create_file("supply_map", 0444, debugfs_root, NULL,
4366 &supply_map_fops);
4367
4368 debugfs_create_file("regulator_summary", 0444, debugfs_root,
4369 NULL, ®ulator_summary_fops);
4370
4371 regulator_dummy_init();
4372
4373 return ret;
4374}
4375
4376
4377core_initcall(regulator_init);
4378
4379static int __init regulator_late_cleanup(struct device *dev, void *data)
4380{
4381 struct regulator_dev *rdev = dev_to_rdev(dev);
4382 const struct regulator_ops *ops = rdev->desc->ops;
4383 struct regulation_constraints *c = rdev->constraints;
4384 int enabled, ret;
4385
4386 if (c && c->always_on)
4387 return 0;
4388
4389 if (c && !(c->valid_ops_mask & REGULATOR_CHANGE_STATUS))
4390 return 0;
4391
4392 mutex_lock(&rdev->mutex);
4393
4394 if (rdev->use_count)
4395 goto unlock;
4396
4397
4398 if (ops->is_enabled)
4399 enabled = ops->is_enabled(rdev);
4400 else
4401 enabled = 1;
4402
4403 if (!enabled)
4404 goto unlock;
4405
4406 if (have_full_constraints()) {
4407
4408
4409 rdev_info(rdev, "disabling\n");
4410 ret = _regulator_do_disable(rdev);
4411 if (ret != 0)
4412 rdev_err(rdev, "couldn't disable: %d\n", ret);
4413 } else {
4414
4415
4416
4417
4418
4419 rdev_warn(rdev, "incomplete constraints, leaving on\n");
4420 }
4421
4422unlock:
4423 mutex_unlock(&rdev->mutex);
4424
4425 return 0;
4426}
4427
4428static int __init regulator_init_complete(void)
4429{
4430
4431
4432
4433
4434
4435
4436 if (of_have_populated_dt())
4437 has_full_constraints = true;
4438
4439
4440
4441
4442
4443
4444 class_for_each_device(®ulator_class, NULL, NULL,
4445 regulator_late_cleanup);
4446
4447 return 0;
4448}
4449late_initcall_sync(regulator_init_complete);
4450