2 * core.c -- Voltage/Current Regulator framework.
4 * Copyright 2007, 2008 Wolfson Microelectronics PLC.
5 * Copyright 2008 SlimLogic Ltd.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/device.h>
19 #include <linux/err.h>
20 #include <linux/mutex.h>
21 #include <linux/suspend.h>
22 #include <linux/regulator/consumer.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/machine.h>
26 #define REGULATOR_VERSION "0.5"
28 static DEFINE_MUTEX(regulator_list_mutex
);
29 static LIST_HEAD(regulator_list
);
30 static LIST_HEAD(regulator_map_list
);
33 * struct regulator_dev
35 * Voltage / Current regulator class device. One for each regulator.
37 struct regulator_dev
{
38 struct regulator_desc
*desc
;
41 /* lists we belong to */
42 struct list_head list
; /* list of all regulators */
43 struct list_head slist
; /* list of supplied regulators */
46 struct list_head consumer_list
; /* consumers we supply */
47 struct list_head supply_list
; /* regulators we supply */
49 struct blocking_notifier_head notifier
;
50 struct mutex mutex
; /* consumer lock */
53 struct regulation_constraints
*constraints
;
54 struct regulator_dev
*supply
; /* for tree */
56 void *reg_data
; /* regulator_dev data */
60 * struct regulator_map
62 * Used to provide symbolic supply names to devices.
64 struct regulator_map
{
65 struct list_head list
;
68 struct regulator_dev
*regulator
;
74 * One for each consumer device.
78 struct list_head list
;
82 int enabled
; /* count of client enables */
84 struct device_attribute dev_attr
;
85 struct regulator_dev
*rdev
;
88 static int _regulator_is_enabled(struct regulator_dev
*rdev
);
89 static int _regulator_disable(struct regulator_dev
*rdev
);
90 static int _regulator_get_voltage(struct regulator_dev
*rdev
);
91 static int _regulator_get_current_limit(struct regulator_dev
*rdev
);
92 static unsigned int _regulator_get_mode(struct regulator_dev
*rdev
);
93 static void _notifier_call_chain(struct regulator_dev
*rdev
,
94 unsigned long event
, void *data
);
96 /* gets the regulator for a given consumer device */
97 static struct regulator
*get_device_regulator(struct device
*dev
)
99 struct regulator
*regulator
= NULL
;
100 struct regulator_dev
*rdev
;
102 mutex_lock(®ulator_list_mutex
);
103 list_for_each_entry(rdev
, ®ulator_list
, list
) {
104 mutex_lock(&rdev
->mutex
);
105 list_for_each_entry(regulator
, &rdev
->consumer_list
, list
) {
106 if (regulator
->dev
== dev
) {
107 mutex_unlock(&rdev
->mutex
);
108 mutex_unlock(®ulator_list_mutex
);
112 mutex_unlock(&rdev
->mutex
);
114 mutex_unlock(®ulator_list_mutex
);
118 /* Platform voltage constraint check */
119 static int regulator_check_voltage(struct regulator_dev
*rdev
,
120 int *min_uV
, int *max_uV
)
122 BUG_ON(*min_uV
> *max_uV
);
124 if (!rdev
->constraints
) {
125 printk(KERN_ERR
"%s: no constraints for %s\n", __func__
,
129 if (!(rdev
->constraints
->valid_ops_mask
& REGULATOR_CHANGE_VOLTAGE
)) {
130 printk(KERN_ERR
"%s: operation not allowed for %s\n",
131 __func__
, rdev
->desc
->name
);
135 if (*max_uV
> rdev
->constraints
->max_uV
)
136 *max_uV
= rdev
->constraints
->max_uV
;
137 if (*min_uV
< rdev
->constraints
->min_uV
)
138 *min_uV
= rdev
->constraints
->min_uV
;
140 if (*min_uV
> *max_uV
)
146 /* current constraint check */
147 static int regulator_check_current_limit(struct regulator_dev
*rdev
,
148 int *min_uA
, int *max_uA
)
150 BUG_ON(*min_uA
> *max_uA
);
152 if (!rdev
->constraints
) {
153 printk(KERN_ERR
"%s: no constraints for %s\n", __func__
,
157 if (!(rdev
->constraints
->valid_ops_mask
& REGULATOR_CHANGE_CURRENT
)) {
158 printk(KERN_ERR
"%s: operation not allowed for %s\n",
159 __func__
, rdev
->desc
->name
);
163 if (*max_uA
> rdev
->constraints
->max_uA
)
164 *max_uA
= rdev
->constraints
->max_uA
;
165 if (*min_uA
< rdev
->constraints
->min_uA
)
166 *min_uA
= rdev
->constraints
->min_uA
;
168 if (*min_uA
> *max_uA
)
174 /* operating mode constraint check */
175 static int regulator_check_mode(struct regulator_dev
*rdev
, int mode
)
177 if (!rdev
->constraints
) {
178 printk(KERN_ERR
"%s: no constraints for %s\n", __func__
,
182 if (!(rdev
->constraints
->valid_ops_mask
& REGULATOR_CHANGE_MODE
)) {
183 printk(KERN_ERR
"%s: operation not allowed for %s\n",
184 __func__
, rdev
->desc
->name
);
187 if (!(rdev
->constraints
->valid_modes_mask
& mode
)) {
188 printk(KERN_ERR
"%s: invalid mode %x for %s\n",
189 __func__
, mode
, rdev
->desc
->name
);
195 /* dynamic regulator mode switching constraint check */
196 static int regulator_check_drms(struct regulator_dev
*rdev
)
198 if (!rdev
->constraints
) {
199 printk(KERN_ERR
"%s: no constraints for %s\n", __func__
,
203 if (!(rdev
->constraints
->valid_ops_mask
& REGULATOR_CHANGE_DRMS
)) {
204 printk(KERN_ERR
"%s: operation not allowed for %s\n",
205 __func__
, rdev
->desc
->name
);
211 static ssize_t
device_requested_uA_show(struct device
*dev
,
212 struct device_attribute
*attr
, char *buf
)
214 struct regulator
*regulator
;
216 regulator
= get_device_regulator(dev
);
217 if (regulator
== NULL
)
220 return sprintf(buf
, "%d\n", regulator
->uA_load
);
223 static ssize_t
regulator_uV_show(struct device
*dev
,
224 struct device_attribute
*attr
, char *buf
)
226 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
229 mutex_lock(&rdev
->mutex
);
230 ret
= sprintf(buf
, "%d\n", _regulator_get_voltage(rdev
));
231 mutex_unlock(&rdev
->mutex
);
236 static ssize_t
regulator_uA_show(struct device
*dev
,
237 struct device_attribute
*attr
, char *buf
)
239 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
241 return sprintf(buf
, "%d\n", _regulator_get_current_limit(rdev
));
244 static ssize_t
regulator_name_show(struct device
*dev
,
245 struct device_attribute
*attr
, char *buf
)
247 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
250 if (rdev
->constraints
->name
)
251 name
= rdev
->constraints
->name
;
252 else if (rdev
->desc
->name
)
253 name
= rdev
->desc
->name
;
257 return sprintf(buf
, "%s\n", name
);
260 static ssize_t
regulator_opmode_show(struct device
*dev
,
261 struct device_attribute
*attr
, char *buf
)
263 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
264 int mode
= _regulator_get_mode(rdev
);
267 case REGULATOR_MODE_FAST
:
268 return sprintf(buf
, "fast\n");
269 case REGULATOR_MODE_NORMAL
:
270 return sprintf(buf
, "normal\n");
271 case REGULATOR_MODE_IDLE
:
272 return sprintf(buf
, "idle\n");
273 case REGULATOR_MODE_STANDBY
:
274 return sprintf(buf
, "standby\n");
276 return sprintf(buf
, "unknown\n");
279 static ssize_t
regulator_state_show(struct device
*dev
,
280 struct device_attribute
*attr
, char *buf
)
282 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
283 int state
= _regulator_is_enabled(rdev
);
286 return sprintf(buf
, "enabled\n");
288 return sprintf(buf
, "disabled\n");
290 return sprintf(buf
, "unknown\n");
293 static ssize_t
regulator_min_uA_show(struct device
*dev
,
294 struct device_attribute
*attr
, char *buf
)
296 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
298 if (!rdev
->constraints
)
299 return sprintf(buf
, "constraint not defined\n");
301 return sprintf(buf
, "%d\n", rdev
->constraints
->min_uA
);
304 static ssize_t
regulator_max_uA_show(struct device
*dev
,
305 struct device_attribute
*attr
, char *buf
)
307 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
309 if (!rdev
->constraints
)
310 return sprintf(buf
, "constraint not defined\n");
312 return sprintf(buf
, "%d\n", rdev
->constraints
->max_uA
);
315 static ssize_t
regulator_min_uV_show(struct device
*dev
,
316 struct device_attribute
*attr
, char *buf
)
318 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
320 if (!rdev
->constraints
)
321 return sprintf(buf
, "constraint not defined\n");
323 return sprintf(buf
, "%d\n", rdev
->constraints
->min_uV
);
326 static ssize_t
regulator_max_uV_show(struct device
*dev
,
327 struct device_attribute
*attr
, char *buf
)
329 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
331 if (!rdev
->constraints
)
332 return sprintf(buf
, "constraint not defined\n");
334 return sprintf(buf
, "%d\n", rdev
->constraints
->max_uV
);
337 static ssize_t
regulator_total_uA_show(struct device
*dev
,
338 struct device_attribute
*attr
, char *buf
)
340 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
341 struct regulator
*regulator
;
344 mutex_lock(&rdev
->mutex
);
345 list_for_each_entry(regulator
, &rdev
->consumer_list
, list
)
346 uA
+= regulator
->uA_load
;
347 mutex_unlock(&rdev
->mutex
);
348 return sprintf(buf
, "%d\n", uA
);
351 static ssize_t
regulator_num_users_show(struct device
*dev
,
352 struct device_attribute
*attr
, char *buf
)
354 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
355 return sprintf(buf
, "%d\n", rdev
->use_count
);
358 static ssize_t
regulator_type_show(struct device
*dev
,
359 struct device_attribute
*attr
, char *buf
)
361 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
363 switch (rdev
->desc
->type
) {
364 case REGULATOR_VOLTAGE
:
365 return sprintf(buf
, "voltage\n");
366 case REGULATOR_CURRENT
:
367 return sprintf(buf
, "current\n");
369 return sprintf(buf
, "unknown\n");
372 static ssize_t
regulator_suspend_mem_uV_show(struct device
*dev
,
373 struct device_attribute
*attr
, char *buf
)
375 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
377 if (!rdev
->constraints
)
378 return sprintf(buf
, "not defined\n");
379 return sprintf(buf
, "%d\n", rdev
->constraints
->state_mem
.uV
);
382 static ssize_t
regulator_suspend_disk_uV_show(struct device
*dev
,
383 struct device_attribute
*attr
, char *buf
)
385 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
387 if (!rdev
->constraints
)
388 return sprintf(buf
, "not defined\n");
389 return sprintf(buf
, "%d\n", rdev
->constraints
->state_disk
.uV
);
392 static ssize_t
regulator_suspend_standby_uV_show(struct device
*dev
,
393 struct device_attribute
*attr
, char *buf
)
395 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
397 if (!rdev
->constraints
)
398 return sprintf(buf
, "not defined\n");
399 return sprintf(buf
, "%d\n", rdev
->constraints
->state_standby
.uV
);
402 static ssize_t
suspend_opmode_show(struct regulator_dev
*rdev
,
403 unsigned int mode
, char *buf
)
406 case REGULATOR_MODE_FAST
:
407 return sprintf(buf
, "fast\n");
408 case REGULATOR_MODE_NORMAL
:
409 return sprintf(buf
, "normal\n");
410 case REGULATOR_MODE_IDLE
:
411 return sprintf(buf
, "idle\n");
412 case REGULATOR_MODE_STANDBY
:
413 return sprintf(buf
, "standby\n");
415 return sprintf(buf
, "unknown\n");
418 static ssize_t
regulator_suspend_mem_mode_show(struct device
*dev
,
419 struct device_attribute
*attr
, char *buf
)
421 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
423 if (!rdev
->constraints
)
424 return sprintf(buf
, "not defined\n");
425 return suspend_opmode_show(rdev
,
426 rdev
->constraints
->state_mem
.mode
, buf
);
429 static ssize_t
regulator_suspend_disk_mode_show(struct device
*dev
,
430 struct device_attribute
*attr
, char *buf
)
432 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
434 if (!rdev
->constraints
)
435 return sprintf(buf
, "not defined\n");
436 return suspend_opmode_show(rdev
,
437 rdev
->constraints
->state_disk
.mode
, buf
);
440 static ssize_t
regulator_suspend_standby_mode_show(struct device
*dev
,
441 struct device_attribute
*attr
, char *buf
)
443 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
445 if (!rdev
->constraints
)
446 return sprintf(buf
, "not defined\n");
447 return suspend_opmode_show(rdev
,
448 rdev
->constraints
->state_standby
.mode
, buf
);
451 static ssize_t
regulator_suspend_mem_state_show(struct device
*dev
,
452 struct device_attribute
*attr
, char *buf
)
454 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
456 if (!rdev
->constraints
)
457 return sprintf(buf
, "not defined\n");
459 if (rdev
->constraints
->state_mem
.enabled
)
460 return sprintf(buf
, "enabled\n");
462 return sprintf(buf
, "disabled\n");
465 static ssize_t
regulator_suspend_disk_state_show(struct device
*dev
,
466 struct device_attribute
*attr
, char *buf
)
468 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
470 if (!rdev
->constraints
)
471 return sprintf(buf
, "not defined\n");
473 if (rdev
->constraints
->state_disk
.enabled
)
474 return sprintf(buf
, "enabled\n");
476 return sprintf(buf
, "disabled\n");
479 static ssize_t
regulator_suspend_standby_state_show(struct device
*dev
,
480 struct device_attribute
*attr
, char *buf
)
482 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
484 if (!rdev
->constraints
)
485 return sprintf(buf
, "not defined\n");
487 if (rdev
->constraints
->state_standby
.enabled
)
488 return sprintf(buf
, "enabled\n");
490 return sprintf(buf
, "disabled\n");
493 static struct device_attribute regulator_dev_attrs
[] = {
494 __ATTR(name
, 0444, regulator_name_show
, NULL
),
495 __ATTR(microvolts
, 0444, regulator_uV_show
, NULL
),
496 __ATTR(microamps
, 0444, regulator_uA_show
, NULL
),
497 __ATTR(opmode
, 0444, regulator_opmode_show
, NULL
),
498 __ATTR(state
, 0444, regulator_state_show
, NULL
),
499 __ATTR(min_microvolts
, 0444, regulator_min_uV_show
, NULL
),
500 __ATTR(min_microamps
, 0444, regulator_min_uA_show
, NULL
),
501 __ATTR(max_microvolts
, 0444, regulator_max_uV_show
, NULL
),
502 __ATTR(max_microamps
, 0444, regulator_max_uA_show
, NULL
),
503 __ATTR(requested_microamps
, 0444, regulator_total_uA_show
, NULL
),
504 __ATTR(num_users
, 0444, regulator_num_users_show
, NULL
),
505 __ATTR(type
, 0444, regulator_type_show
, NULL
),
506 __ATTR(suspend_mem_microvolts
, 0444,
507 regulator_suspend_mem_uV_show
, NULL
),
508 __ATTR(suspend_disk_microvolts
, 0444,
509 regulator_suspend_disk_uV_show
, NULL
),
510 __ATTR(suspend_standby_microvolts
, 0444,
511 regulator_suspend_standby_uV_show
, NULL
),
512 __ATTR(suspend_mem_mode
, 0444,
513 regulator_suspend_mem_mode_show
, NULL
),
514 __ATTR(suspend_disk_mode
, 0444,
515 regulator_suspend_disk_mode_show
, NULL
),
516 __ATTR(suspend_standby_mode
, 0444,
517 regulator_suspend_standby_mode_show
, NULL
),
518 __ATTR(suspend_mem_state
, 0444,
519 regulator_suspend_mem_state_show
, NULL
),
520 __ATTR(suspend_disk_state
, 0444,
521 regulator_suspend_disk_state_show
, NULL
),
522 __ATTR(suspend_standby_state
, 0444,
523 regulator_suspend_standby_state_show
, NULL
),
527 static void regulator_dev_release(struct device
*dev
)
529 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
533 static struct class regulator_class
= {
535 .dev_release
= regulator_dev_release
,
536 .dev_attrs
= regulator_dev_attrs
,
539 /* Calculate the new optimum regulator operating mode based on the new total
540 * consumer load. All locks held by caller */
541 static void drms_uA_update(struct regulator_dev
*rdev
)
543 struct regulator
*sibling
;
544 int current_uA
= 0, output_uV
, input_uV
, err
;
547 err
= regulator_check_drms(rdev
);
548 if (err
< 0 || !rdev
->desc
->ops
->get_optimum_mode
||
549 !rdev
->desc
->ops
->get_voltage
|| !rdev
->desc
->ops
->set_mode
);
552 /* get output voltage */
553 output_uV
= rdev
->desc
->ops
->get_voltage(rdev
);
557 /* get input voltage */
558 if (rdev
->supply
&& rdev
->supply
->desc
->ops
->get_voltage
)
559 input_uV
= rdev
->supply
->desc
->ops
->get_voltage(rdev
->supply
);
561 input_uV
= rdev
->constraints
->input_uV
;
565 /* calc total requested load */
566 list_for_each_entry(sibling
, &rdev
->consumer_list
, list
)
567 current_uA
+= sibling
->uA_load
;
569 /* now get the optimum mode for our new total regulator load */
570 mode
= rdev
->desc
->ops
->get_optimum_mode(rdev
, input_uV
,
571 output_uV
, current_uA
);
573 /* check the new mode is allowed */
574 err
= regulator_check_mode(rdev
, mode
);
576 rdev
->desc
->ops
->set_mode(rdev
, mode
);
579 static int suspend_set_state(struct regulator_dev
*rdev
,
580 struct regulator_state
*rstate
)
584 /* enable & disable are mandatory for suspend control */
585 if (!rdev
->desc
->ops
->set_suspend_enable
||
586 !rdev
->desc
->ops
->set_suspend_disable
) {
587 printk(KERN_ERR
"%s: no way to set suspend state\n",
593 ret
= rdev
->desc
->ops
->set_suspend_enable(rdev
);
595 ret
= rdev
->desc
->ops
->set_suspend_disable(rdev
);
597 printk(KERN_ERR
"%s: failed to enabled/disable\n", __func__
);
601 if (rdev
->desc
->ops
->set_suspend_voltage
&& rstate
->uV
> 0) {
602 ret
= rdev
->desc
->ops
->set_suspend_voltage(rdev
, rstate
->uV
);
604 printk(KERN_ERR
"%s: failed to set voltage\n",
610 if (rdev
->desc
->ops
->set_suspend_mode
&& rstate
->mode
> 0) {
611 ret
= rdev
->desc
->ops
->set_suspend_mode(rdev
, rstate
->mode
);
613 printk(KERN_ERR
"%s: failed to set mode\n", __func__
);
620 /* locks held by caller */
621 static int suspend_prepare(struct regulator_dev
*rdev
, suspend_state_t state
)
623 if (!rdev
->constraints
)
627 case PM_SUSPEND_STANDBY
:
628 return suspend_set_state(rdev
,
629 &rdev
->constraints
->state_standby
);
631 return suspend_set_state(rdev
,
632 &rdev
->constraints
->state_mem
);
634 return suspend_set_state(rdev
,
635 &rdev
->constraints
->state_disk
);
641 static void print_constraints(struct regulator_dev
*rdev
)
643 struct regulation_constraints
*constraints
= rdev
->constraints
;
647 if (rdev
->desc
->type
== REGULATOR_VOLTAGE
) {
648 if (constraints
->min_uV
== constraints
->max_uV
)
649 count
= sprintf(buf
, "%d mV ",
650 constraints
->min_uV
/ 1000);
652 count
= sprintf(buf
, "%d <--> %d mV ",
653 constraints
->min_uV
/ 1000,
654 constraints
->max_uV
/ 1000);
656 if (constraints
->min_uA
== constraints
->max_uA
)
657 count
= sprintf(buf
, "%d mA ",
658 constraints
->min_uA
/ 1000);
660 count
= sprintf(buf
, "%d <--> %d mA ",
661 constraints
->min_uA
/ 1000,
662 constraints
->max_uA
/ 1000);
664 if (constraints
->valid_modes_mask
& REGULATOR_MODE_FAST
)
665 count
+= sprintf(buf
+ count
, "fast ");
666 if (constraints
->valid_modes_mask
& REGULATOR_MODE_NORMAL
)
667 count
+= sprintf(buf
+ count
, "normal ");
668 if (constraints
->valid_modes_mask
& REGULATOR_MODE_IDLE
)
669 count
+= sprintf(buf
+ count
, "idle ");
670 if (constraints
->valid_modes_mask
& REGULATOR_MODE_STANDBY
)
671 count
+= sprintf(buf
+ count
, "standby");
673 printk(KERN_INFO
"regulator: %s: %s\n", rdev
->desc
->name
, buf
);
677 * set_machine_constraints - sets regulator constraints
678 * @regulator: regulator source
680 * Allows platform initialisation code to define and constrain
681 * regulator circuits e.g. valid voltage/current ranges, etc. NOTE:
682 * Constraints *must* be set by platform code in order for some
683 * regulator operations to proceed i.e. set_voltage, set_current_limit,
686 static int set_machine_constraints(struct regulator_dev
*rdev
,
687 struct regulation_constraints
*constraints
)
691 struct regulator_ops
*ops
= rdev
->desc
->ops
;
693 if (constraints
->name
)
694 name
= constraints
->name
;
695 else if (rdev
->desc
->name
)
696 name
= rdev
->desc
->name
;
700 rdev
->constraints
= constraints
;
702 /* do we need to apply the constraint voltage */
703 if (rdev
->constraints
->apply_uV
&&
704 rdev
->constraints
->min_uV
== rdev
->constraints
->max_uV
&&
706 ret
= ops
->set_voltage(rdev
,
707 rdev
->constraints
->min_uV
, rdev
->constraints
->max_uV
);
709 printk(KERN_ERR
"%s: failed to apply %duV constraint to %s\n",
711 rdev
->constraints
->min_uV
, name
);
712 rdev
->constraints
= NULL
;
717 /* are we enabled at boot time by firmware / bootloader */
718 if (rdev
->constraints
->boot_on
)
721 /* do we need to setup our suspend state */
722 if (constraints
->initial_state
) {
723 ret
= suspend_prepare(rdev
, constraints
->initial_state
);
725 printk(KERN_ERR
"%s: failed to set suspend state for %s\n",
727 rdev
->constraints
= NULL
;
732 /* if always_on is set then turn the regulator on if it's not
734 if (constraints
->always_on
&& ops
->enable
&&
735 ((ops
->is_enabled
&& !ops
->is_enabled(rdev
)) ||
736 (!ops
->is_enabled
&& !constraints
->boot_on
))) {
737 ret
= ops
->enable(rdev
);
739 printk(KERN_ERR
"%s: failed to enable %s\n",
741 rdev
->constraints
= NULL
;
746 print_constraints(rdev
);
752 * set_supply - set regulator supply regulator
753 * @regulator: regulator name
754 * @supply: supply regulator name
756 * Called by platform initialisation code to set the supply regulator for this
757 * regulator. This ensures that a regulators supply will also be enabled by the
758 * core if it's child is enabled.
760 static int set_supply(struct regulator_dev
*rdev
,
761 struct regulator_dev
*supply_rdev
)
765 err
= sysfs_create_link(&rdev
->dev
.kobj
, &supply_rdev
->dev
.kobj
,
769 "%s: could not add device link %s err %d\n",
770 __func__
, supply_rdev
->dev
.kobj
.name
, err
);
773 rdev
->supply
= supply_rdev
;
774 list_add(&rdev
->slist
, &supply_rdev
->supply_list
);
780 * set_consumer_device_supply: Bind a regulator to a symbolic supply
781 * @regulator: regulator source
782 * @dev: device the supply applies to
783 * @supply: symbolic name for supply
785 * Allows platform initialisation code to map physical regulator
786 * sources to symbolic names for supplies for use by devices. Devices
787 * should use these symbolic names to request regulators, avoiding the
788 * need to provide board-specific regulator names as platform data.
790 static int set_consumer_device_supply(struct regulator_dev
*rdev
,
791 struct device
*consumer_dev
, const char *supply
)
793 struct regulator_map
*node
;
798 node
= kmalloc(sizeof(struct regulator_map
), GFP_KERNEL
);
802 node
->regulator
= rdev
;
803 node
->dev
= consumer_dev
;
804 node
->supply
= supply
;
806 list_add(&node
->list
, ®ulator_map_list
);
810 static void unset_consumer_device_supply(struct regulator_dev
*rdev
,
811 struct device
*consumer_dev
)
813 struct regulator_map
*node
, *n
;
815 list_for_each_entry_safe(node
, n
, ®ulator_map_list
, list
) {
816 if (rdev
== node
->regulator
&&
817 consumer_dev
== node
->dev
) {
818 list_del(&node
->list
);
825 #define REG_STR_SIZE 32
827 static struct regulator
*create_regulator(struct regulator_dev
*rdev
,
829 const char *supply_name
)
831 struct regulator
*regulator
;
832 char buf
[REG_STR_SIZE
];
835 regulator
= kzalloc(sizeof(*regulator
), GFP_KERNEL
);
836 if (regulator
== NULL
)
839 mutex_lock(&rdev
->mutex
);
840 regulator
->rdev
= rdev
;
841 list_add(®ulator
->list
, &rdev
->consumer_list
);
844 /* create a 'requested_microamps_name' sysfs entry */
845 size
= scnprintf(buf
, REG_STR_SIZE
, "microamps_requested_%s",
847 if (size
>= REG_STR_SIZE
)
850 regulator
->dev
= dev
;
851 regulator
->dev_attr
.attr
.name
= kstrdup(buf
, GFP_KERNEL
);
852 if (regulator
->dev_attr
.attr
.name
== NULL
)
855 regulator
->dev_attr
.attr
.owner
= THIS_MODULE
;
856 regulator
->dev_attr
.attr
.mode
= 0444;
857 regulator
->dev_attr
.show
= device_requested_uA_show
;
858 err
= device_create_file(dev
, ®ulator
->dev_attr
);
860 printk(KERN_WARNING
"%s: could not add regulator_dev"
861 " load sysfs\n", __func__
);
865 /* also add a link to the device sysfs entry */
866 size
= scnprintf(buf
, REG_STR_SIZE
, "%s-%s",
867 dev
->kobj
.name
, supply_name
);
868 if (size
>= REG_STR_SIZE
)
871 regulator
->supply_name
= kstrdup(buf
, GFP_KERNEL
);
872 if (regulator
->supply_name
== NULL
)
875 err
= sysfs_create_link(&rdev
->dev
.kobj
, &dev
->kobj
,
879 "%s: could not add device link %s err %d\n",
880 __func__
, dev
->kobj
.name
, err
);
881 device_remove_file(dev
, ®ulator
->dev_attr
);
885 mutex_unlock(&rdev
->mutex
);
888 kfree(regulator
->supply_name
);
890 device_remove_file(regulator
->dev
, ®ulator
->dev_attr
);
892 kfree(regulator
->dev_attr
.attr
.name
);
894 list_del(®ulator
->list
);
896 mutex_unlock(&rdev
->mutex
);
901 * regulator_get - lookup and obtain a reference to a regulator.
902 * @dev: device for regulator "consumer"
903 * @id: Supply name or regulator ID.
905 * Returns a struct regulator corresponding to the regulator producer,
906 * or IS_ERR() condition containing errno. Use of supply names
907 * configured via regulator_set_device_supply() is strongly
910 struct regulator
*regulator_get(struct device
*dev
, const char *id
)
912 struct regulator_dev
*rdev
;
913 struct regulator_map
*map
;
914 struct regulator
*regulator
= ERR_PTR(-ENODEV
);
917 printk(KERN_ERR
"regulator: get() with no identifier\n");
921 mutex_lock(®ulator_list_mutex
);
923 list_for_each_entry(map
, ®ulator_map_list
, list
) {
924 if (dev
== map
->dev
&&
925 strcmp(map
->supply
, id
) == 0) {
926 rdev
= map
->regulator
;
930 printk(KERN_ERR
"regulator: Unable to get requested regulator: %s\n",
932 mutex_unlock(®ulator_list_mutex
);
936 if (!try_module_get(rdev
->owner
))
939 regulator
= create_regulator(rdev
, dev
, id
);
940 if (regulator
== NULL
) {
941 regulator
= ERR_PTR(-ENOMEM
);
942 module_put(rdev
->owner
);
946 mutex_unlock(®ulator_list_mutex
);
949 EXPORT_SYMBOL_GPL(regulator_get
);
952 * regulator_put - "free" the regulator source
953 * @regulator: regulator source
955 * Note: drivers must ensure that all regulator_enable calls made on this
956 * regulator source are balanced by regulator_disable calls prior to calling
959 void regulator_put(struct regulator
*regulator
)
961 struct regulator_dev
*rdev
;
963 if (regulator
== NULL
|| IS_ERR(regulator
))
966 mutex_lock(®ulator_list_mutex
);
967 rdev
= regulator
->rdev
;
969 if (WARN(regulator
->enabled
, "Releasing supply %s while enabled\n",
970 regulator
->supply_name
))
971 _regulator_disable(rdev
);
973 /* remove any sysfs entries */
974 if (regulator
->dev
) {
975 sysfs_remove_link(&rdev
->dev
.kobj
, regulator
->supply_name
);
976 kfree(regulator
->supply_name
);
977 device_remove_file(regulator
->dev
, ®ulator
->dev_attr
);
978 kfree(regulator
->dev_attr
.attr
.name
);
980 list_del(®ulator
->list
);
983 module_put(rdev
->owner
);
984 mutex_unlock(®ulator_list_mutex
);
986 EXPORT_SYMBOL_GPL(regulator_put
);
988 /* locks held by regulator_enable() */
989 static int _regulator_enable(struct regulator_dev
*rdev
)
993 if (!rdev
->constraints
) {
994 printk(KERN_ERR
"%s: %s has no constraints\n",
995 __func__
, rdev
->desc
->name
);
999 /* do we need to enable the supply regulator first */
1001 ret
= _regulator_enable(rdev
->supply
);
1003 printk(KERN_ERR
"%s: failed to enable %s: %d\n",
1004 __func__
, rdev
->desc
->name
, ret
);
1009 /* check voltage and requested load before enabling */
1010 if (rdev
->desc
->ops
->enable
) {
1012 if (rdev
->constraints
&&
1013 (rdev
->constraints
->valid_ops_mask
&
1014 REGULATOR_CHANGE_DRMS
))
1015 drms_uA_update(rdev
);
1017 ret
= rdev
->desc
->ops
->enable(rdev
);
1019 printk(KERN_ERR
"%s: failed to enable %s: %d\n",
1020 __func__
, rdev
->desc
->name
, ret
);
1031 * regulator_enable - enable regulator output
1032 * @regulator: regulator source
1034 * Enable the regulator output at the predefined voltage or current value.
1035 * NOTE: the output value can be set by other drivers, boot loader or may be
1036 * hardwired in the regulator.
1037 * NOTE: calls to regulator_enable() must be balanced with calls to
1038 * regulator_disable().
1040 int regulator_enable(struct regulator
*regulator
)
1042 struct regulator_dev
*rdev
= regulator
->rdev
;
1045 mutex_lock(&rdev
->mutex
);
1046 if (regulator
->enabled
== 0)
1047 ret
= _regulator_enable(rdev
);
1048 else if (regulator
->enabled
< 0)
1051 regulator
->enabled
++;
1052 mutex_unlock(&rdev
->mutex
);
1055 EXPORT_SYMBOL_GPL(regulator_enable
);
1057 /* locks held by regulator_disable() */
1058 static int _regulator_disable(struct regulator_dev
*rdev
)
1062 /* are we the last user and permitted to disable ? */
1063 if (rdev
->use_count
== 1 && !rdev
->constraints
->always_on
) {
1065 /* we are last user */
1066 if (rdev
->desc
->ops
->disable
) {
1067 ret
= rdev
->desc
->ops
->disable(rdev
);
1069 printk(KERN_ERR
"%s: failed to disable %s\n",
1070 __func__
, rdev
->desc
->name
);
1075 /* decrease our supplies ref count and disable if required */
1077 _regulator_disable(rdev
->supply
);
1079 rdev
->use_count
= 0;
1080 } else if (rdev
->use_count
> 1) {
1082 if (rdev
->constraints
&&
1083 (rdev
->constraints
->valid_ops_mask
&
1084 REGULATOR_CHANGE_DRMS
))
1085 drms_uA_update(rdev
);
1093 * regulator_disable - disable regulator output
1094 * @regulator: regulator source
1096 * Disable the regulator output voltage or current.
1097 * NOTE: this will only disable the regulator output if no other consumer
1098 * devices have it enabled.
1099 * NOTE: calls to regulator_enable() must be balanced with calls to
1100 * regulator_disable().
1102 int regulator_disable(struct regulator
*regulator
)
1104 struct regulator_dev
*rdev
= regulator
->rdev
;
1107 mutex_lock(&rdev
->mutex
);
1108 if (regulator
->enabled
== 1) {
1109 ret
= _regulator_disable(rdev
);
1111 regulator
->uA_load
= 0;
1112 } else if (WARN(regulator
->enabled
<= 0,
1113 "unbalanced disables for supply %s\n",
1114 regulator
->supply_name
))
1117 regulator
->enabled
--;
1118 mutex_unlock(&rdev
->mutex
);
1121 EXPORT_SYMBOL_GPL(regulator_disable
);
1123 /* locks held by regulator_force_disable() */
1124 static int _regulator_force_disable(struct regulator_dev
*rdev
)
1129 if (rdev
->desc
->ops
->disable
) {
1130 /* ah well, who wants to live forever... */
1131 ret
= rdev
->desc
->ops
->disable(rdev
);
1133 printk(KERN_ERR
"%s: failed to force disable %s\n",
1134 __func__
, rdev
->desc
->name
);
1137 /* notify other consumers that power has been forced off */
1138 _notifier_call_chain(rdev
, REGULATOR_EVENT_FORCE_DISABLE
,
1142 /* decrease our supplies ref count and disable if required */
1144 _regulator_disable(rdev
->supply
);
1146 rdev
->use_count
= 0;
1151 * regulator_force_disable - force disable regulator output
1152 * @regulator: regulator source
1154 * Forcibly disable the regulator output voltage or current.
1155 * NOTE: this *will* disable the regulator output even if other consumer
1156 * devices have it enabled. This should be used for situations when device
1157 * damage will likely occur if the regulator is not disabled (e.g. over temp).
1159 int regulator_force_disable(struct regulator
*regulator
)
1163 mutex_lock(®ulator
->rdev
->mutex
);
1164 regulator
->enabled
= 0;
1165 regulator
->uA_load
= 0;
1166 ret
= _regulator_force_disable(regulator
->rdev
);
1167 mutex_unlock(®ulator
->rdev
->mutex
);
1170 EXPORT_SYMBOL_GPL(regulator_force_disable
);
1172 static int _regulator_is_enabled(struct regulator_dev
*rdev
)
1176 mutex_lock(&rdev
->mutex
);
1179 if (!rdev
->desc
->ops
->is_enabled
) {
1184 ret
= rdev
->desc
->ops
->is_enabled(rdev
);
1186 mutex_unlock(&rdev
->mutex
);
1191 * regulator_is_enabled - is the regulator output enabled
1192 * @regulator: regulator source
1194 * Returns positive if the regulator driver backing the source/client
1195 * has requested that the device be enabled, zero if it hasn't, else a
1196 * negative errno code.
1198 * Note that the device backing this regulator handle can have multiple
1199 * users, so it might be enabled even if regulator_enable() was never
1200 * called for this particular source.
1202 int regulator_is_enabled(struct regulator
*regulator
)
1204 return _regulator_is_enabled(regulator
->rdev
);
1206 EXPORT_SYMBOL_GPL(regulator_is_enabled
);
1209 * regulator_set_voltage - set regulator output voltage
1210 * @regulator: regulator source
1211 * @min_uV: Minimum required voltage in uV
1212 * @max_uV: Maximum acceptable voltage in uV
1214 * Sets a voltage regulator to the desired output voltage. This can be set
1215 * during any regulator state. IOW, regulator can be disabled or enabled.
1217 * If the regulator is enabled then the voltage will change to the new value
1218 * immediately otherwise if the regulator is disabled the regulator will
1219 * output at the new voltage when enabled.
1221 * NOTE: If the regulator is shared between several devices then the lowest
1222 * request voltage that meets the system constraints will be used.
1223 * NOTE: Regulator system constraints must be set for this regulator before
1224 * calling this function otherwise this call will fail.
1226 int regulator_set_voltage(struct regulator
*regulator
, int min_uV
, int max_uV
)
1228 struct regulator_dev
*rdev
= regulator
->rdev
;
1231 mutex_lock(&rdev
->mutex
);
1234 if (!rdev
->desc
->ops
->set_voltage
) {
1239 /* constraints check */
1240 ret
= regulator_check_voltage(rdev
, &min_uV
, &max_uV
);
1243 regulator
->min_uV
= min_uV
;
1244 regulator
->max_uV
= max_uV
;
1245 ret
= rdev
->desc
->ops
->set_voltage(rdev
, min_uV
, max_uV
);
1248 mutex_unlock(&rdev
->mutex
);
1251 EXPORT_SYMBOL_GPL(regulator_set_voltage
);
1253 static int _regulator_get_voltage(struct regulator_dev
*rdev
)
1256 if (rdev
->desc
->ops
->get_voltage
)
1257 return rdev
->desc
->ops
->get_voltage(rdev
);
1263 * regulator_get_voltage - get regulator output voltage
1264 * @regulator: regulator source
1266 * This returns the current regulator voltage in uV.
1268 * NOTE: If the regulator is disabled it will return the voltage value. This
1269 * function should not be used to determine regulator state.
1271 int regulator_get_voltage(struct regulator
*regulator
)
1275 mutex_lock(®ulator
->rdev
->mutex
);
1277 ret
= _regulator_get_voltage(regulator
->rdev
);
1279 mutex_unlock(®ulator
->rdev
->mutex
);
1283 EXPORT_SYMBOL_GPL(regulator_get_voltage
);
1286 * regulator_set_current_limit - set regulator output current limit
1287 * @regulator: regulator source
1288 * @min_uA: Minimuum supported current in uA
1289 * @max_uA: Maximum supported current in uA
1291 * Sets current sink to the desired output current. This can be set during
1292 * any regulator state. IOW, regulator can be disabled or enabled.
1294 * If the regulator is enabled then the current will change to the new value
1295 * immediately otherwise if the regulator is disabled the regulator will
1296 * output at the new current when enabled.
1298 * NOTE: Regulator system constraints must be set for this regulator before
1299 * calling this function otherwise this call will fail.
1301 int regulator_set_current_limit(struct regulator
*regulator
,
1302 int min_uA
, int max_uA
)
1304 struct regulator_dev
*rdev
= regulator
->rdev
;
1307 mutex_lock(&rdev
->mutex
);
1310 if (!rdev
->desc
->ops
->set_current_limit
) {
1315 /* constraints check */
1316 ret
= regulator_check_current_limit(rdev
, &min_uA
, &max_uA
);
1320 ret
= rdev
->desc
->ops
->set_current_limit(rdev
, min_uA
, max_uA
);
1322 mutex_unlock(&rdev
->mutex
);
1325 EXPORT_SYMBOL_GPL(regulator_set_current_limit
);
1327 static int _regulator_get_current_limit(struct regulator_dev
*rdev
)
1331 mutex_lock(&rdev
->mutex
);
1334 if (!rdev
->desc
->ops
->get_current_limit
) {
1339 ret
= rdev
->desc
->ops
->get_current_limit(rdev
);
1341 mutex_unlock(&rdev
->mutex
);
1346 * regulator_get_current_limit - get regulator output current
1347 * @regulator: regulator source
1349 * This returns the current supplied by the specified current sink in uA.
1351 * NOTE: If the regulator is disabled it will return the current value. This
1352 * function should not be used to determine regulator state.
1354 int regulator_get_current_limit(struct regulator
*regulator
)
1356 return _regulator_get_current_limit(regulator
->rdev
);
1358 EXPORT_SYMBOL_GPL(regulator_get_current_limit
);
1361 * regulator_set_mode - set regulator operating mode
1362 * @regulator: regulator source
1363 * @mode: operating mode - one of the REGULATOR_MODE constants
1365 * Set regulator operating mode to increase regulator efficiency or improve
1366 * regulation performance.
1368 * NOTE: Regulator system constraints must be set for this regulator before
1369 * calling this function otherwise this call will fail.
1371 int regulator_set_mode(struct regulator
*regulator
, unsigned int mode
)
1373 struct regulator_dev
*rdev
= regulator
->rdev
;
1376 mutex_lock(&rdev
->mutex
);
1379 if (!rdev
->desc
->ops
->set_mode
) {
1384 /* constraints check */
1385 ret
= regulator_check_mode(rdev
, mode
);
1389 ret
= rdev
->desc
->ops
->set_mode(rdev
, mode
);
1391 mutex_unlock(&rdev
->mutex
);
1394 EXPORT_SYMBOL_GPL(regulator_set_mode
);
1396 static unsigned int _regulator_get_mode(struct regulator_dev
*rdev
)
1400 mutex_lock(&rdev
->mutex
);
1403 if (!rdev
->desc
->ops
->get_mode
) {
1408 ret
= rdev
->desc
->ops
->get_mode(rdev
);
1410 mutex_unlock(&rdev
->mutex
);
1415 * regulator_get_mode - get regulator operating mode
1416 * @regulator: regulator source
1418 * Get the current regulator operating mode.
1420 unsigned int regulator_get_mode(struct regulator
*regulator
)
1422 return _regulator_get_mode(regulator
->rdev
);
1424 EXPORT_SYMBOL_GPL(regulator_get_mode
);
1427 * regulator_set_optimum_mode - set regulator optimum operating mode
1428 * @regulator: regulator source
1429 * @uA_load: load current
1431 * Notifies the regulator core of a new device load. This is then used by
1432 * DRMS (if enabled by constraints) to set the most efficient regulator
1433 * operating mode for the new regulator loading.
1435 * Consumer devices notify their supply regulator of the maximum power
1436 * they will require (can be taken from device datasheet in the power
1437 * consumption tables) when they change operational status and hence power
1438 * state. Examples of operational state changes that can affect power
1439 * consumption are :-
1441 * o Device is opened / closed.
1442 * o Device I/O is about to begin or has just finished.
1443 * o Device is idling in between work.
1445 * This information is also exported via sysfs to userspace.
1447 * DRMS will sum the total requested load on the regulator and change
1448 * to the most efficient operating mode if platform constraints allow.
1450 * Returns the new regulator mode or error.
1452 int regulator_set_optimum_mode(struct regulator
*regulator
, int uA_load
)
1454 struct regulator_dev
*rdev
= regulator
->rdev
;
1455 struct regulator
*consumer
;
1456 int ret
, output_uV
, input_uV
, total_uA_load
= 0;
1459 mutex_lock(&rdev
->mutex
);
1461 regulator
->uA_load
= uA_load
;
1462 ret
= regulator_check_drms(rdev
);
1468 if (!rdev
->desc
->ops
->get_optimum_mode
)
1471 /* get output voltage */
1472 output_uV
= rdev
->desc
->ops
->get_voltage(rdev
);
1473 if (output_uV
<= 0) {
1474 printk(KERN_ERR
"%s: invalid output voltage found for %s\n",
1475 __func__
, rdev
->desc
->name
);
1479 /* get input voltage */
1480 if (rdev
->supply
&& rdev
->supply
->desc
->ops
->get_voltage
)
1481 input_uV
= rdev
->supply
->desc
->ops
->get_voltage(rdev
->supply
);
1483 input_uV
= rdev
->constraints
->input_uV
;
1484 if (input_uV
<= 0) {
1485 printk(KERN_ERR
"%s: invalid input voltage found for %s\n",
1486 __func__
, rdev
->desc
->name
);
1490 /* calc total requested load for this regulator */
1491 list_for_each_entry(consumer
, &rdev
->consumer_list
, list
)
1492 total_uA_load
+= consumer
->uA_load
;
1494 mode
= rdev
->desc
->ops
->get_optimum_mode(rdev
,
1495 input_uV
, output_uV
,
1498 printk(KERN_ERR
"%s: failed to get optimum mode for %s @"
1499 " %d uA %d -> %d uV\n", __func__
, rdev
->desc
->name
,
1500 total_uA_load
, input_uV
, output_uV
);
1504 ret
= rdev
->desc
->ops
->set_mode(rdev
, mode
);
1506 printk(KERN_ERR
"%s: failed to set optimum mode %x for %s\n",
1507 __func__
, mode
, rdev
->desc
->name
);
1512 mutex_unlock(&rdev
->mutex
);
1515 EXPORT_SYMBOL_GPL(regulator_set_optimum_mode
);
1518 * regulator_register_notifier - register regulator event notifier
1519 * @regulator: regulator source
1520 * @notifier_block: notifier block
1522 * Register notifier block to receive regulator events.
1524 int regulator_register_notifier(struct regulator
*regulator
,
1525 struct notifier_block
*nb
)
1527 return blocking_notifier_chain_register(®ulator
->rdev
->notifier
,
1530 EXPORT_SYMBOL_GPL(regulator_register_notifier
);
1533 * regulator_unregister_notifier - unregister regulator event notifier
1534 * @regulator: regulator source
1535 * @notifier_block: notifier block
1537 * Unregister regulator event notifier block.
1539 int regulator_unregister_notifier(struct regulator
*regulator
,
1540 struct notifier_block
*nb
)
1542 return blocking_notifier_chain_unregister(®ulator
->rdev
->notifier
,
1545 EXPORT_SYMBOL_GPL(regulator_unregister_notifier
);
1547 /* notify regulator consumers and downstream regulator consumers */
1548 static void _notifier_call_chain(struct regulator_dev
*rdev
,
1549 unsigned long event
, void *data
)
1551 struct regulator_dev
*_rdev
;
1553 /* call rdev chain first */
1554 mutex_lock(&rdev
->mutex
);
1555 blocking_notifier_call_chain(&rdev
->notifier
, event
, NULL
);
1556 mutex_unlock(&rdev
->mutex
);
1558 /* now notify regulator we supply */
1559 list_for_each_entry(_rdev
, &rdev
->supply_list
, slist
)
1560 _notifier_call_chain(_rdev
, event
, data
);
1564 * regulator_bulk_get - get multiple regulator consumers
1566 * @dev: Device to supply
1567 * @num_consumers: Number of consumers to register
1568 * @consumers: Configuration of consumers; clients are stored here.
1570 * @return 0 on success, an errno on failure.
1572 * This helper function allows drivers to get several regulator
1573 * consumers in one operation. If any of the regulators cannot be
1574 * acquired then any regulators that were allocated will be freed
1575 * before returning to the caller.
1577 int regulator_bulk_get(struct device
*dev
, int num_consumers
,
1578 struct regulator_bulk_data
*consumers
)
1583 for (i
= 0; i
< num_consumers
; i
++)
1584 consumers
[i
].consumer
= NULL
;
1586 for (i
= 0; i
< num_consumers
; i
++) {
1587 consumers
[i
].consumer
= regulator_get(dev
,
1588 consumers
[i
].supply
);
1589 if (IS_ERR(consumers
[i
].consumer
)) {
1590 dev_err(dev
, "Failed to get supply '%s'\n",
1591 consumers
[i
].supply
);
1592 ret
= PTR_ERR(consumers
[i
].consumer
);
1593 consumers
[i
].consumer
= NULL
;
1601 for (i
= 0; i
< num_consumers
&& consumers
[i
].consumer
; i
++)
1602 regulator_put(consumers
[i
].consumer
);
1606 EXPORT_SYMBOL_GPL(regulator_bulk_get
);
1609 * regulator_bulk_enable - enable multiple regulator consumers
1611 * @num_consumers: Number of consumers
1612 * @consumers: Consumer data; clients are stored here.
1613 * @return 0 on success, an errno on failure
1615 * This convenience API allows consumers to enable multiple regulator
1616 * clients in a single API call. If any consumers cannot be enabled
1617 * then any others that were enabled will be disabled again prior to
1620 int regulator_bulk_enable(int num_consumers
,
1621 struct regulator_bulk_data
*consumers
)
1626 for (i
= 0; i
< num_consumers
; i
++) {
1627 ret
= regulator_enable(consumers
[i
].consumer
);
1635 printk(KERN_ERR
"Failed to enable %s\n", consumers
[i
].supply
);
1636 for (i
= 0; i
< num_consumers
; i
++)
1637 regulator_disable(consumers
[i
].consumer
);
1641 EXPORT_SYMBOL_GPL(regulator_bulk_enable
);
1644 * regulator_bulk_disable - disable multiple regulator consumers
1646 * @num_consumers: Number of consumers
1647 * @consumers: Consumer data; clients are stored here.
1648 * @return 0 on success, an errno on failure
1650 * This convenience API allows consumers to disable multiple regulator
1651 * clients in a single API call. If any consumers cannot be enabled
1652 * then any others that were disabled will be disabled again prior to
1655 int regulator_bulk_disable(int num_consumers
,
1656 struct regulator_bulk_data
*consumers
)
1661 for (i
= 0; i
< num_consumers
; i
++) {
1662 ret
= regulator_disable(consumers
[i
].consumer
);
1670 printk(KERN_ERR
"Failed to disable %s\n", consumers
[i
].supply
);
1671 for (i
= 0; i
< num_consumers
; i
++)
1672 regulator_enable(consumers
[i
].consumer
);
1676 EXPORT_SYMBOL_GPL(regulator_bulk_disable
);
1679 * regulator_bulk_free - free multiple regulator consumers
1681 * @num_consumers: Number of consumers
1682 * @consumers: Consumer data; clients are stored here.
1684 * This convenience API allows consumers to free multiple regulator
1685 * clients in a single API call.
1687 void regulator_bulk_free(int num_consumers
,
1688 struct regulator_bulk_data
*consumers
)
1692 for (i
= 0; i
< num_consumers
; i
++) {
1693 regulator_put(consumers
[i
].consumer
);
1694 consumers
[i
].consumer
= NULL
;
1697 EXPORT_SYMBOL_GPL(regulator_bulk_free
);
1700 * regulator_notifier_call_chain - call regulator event notifier
1701 * @regulator: regulator source
1702 * @event: notifier block
1705 * Called by regulator drivers to notify clients a regulator event has
1706 * occurred. We also notify regulator clients downstream.
1708 int regulator_notifier_call_chain(struct regulator_dev
*rdev
,
1709 unsigned long event
, void *data
)
1711 _notifier_call_chain(rdev
, event
, data
);
1715 EXPORT_SYMBOL_GPL(regulator_notifier_call_chain
);
1718 * regulator_register - register regulator
1719 * @regulator: regulator source
1720 * @reg_data: private regulator data
1722 * Called by regulator drivers to register a regulator.
1723 * Returns 0 on success.
1725 struct regulator_dev
*regulator_register(struct regulator_desc
*regulator_desc
,
1726 struct device
*dev
, void *driver_data
)
1728 static atomic_t regulator_no
= ATOMIC_INIT(0);
1729 struct regulator_dev
*rdev
;
1730 struct regulator_init_data
*init_data
= dev
->platform_data
;
1733 if (regulator_desc
== NULL
)
1734 return ERR_PTR(-EINVAL
);
1736 if (regulator_desc
->name
== NULL
|| regulator_desc
->ops
== NULL
)
1737 return ERR_PTR(-EINVAL
);
1739 if (!regulator_desc
->type
== REGULATOR_VOLTAGE
&&
1740 !regulator_desc
->type
== REGULATOR_CURRENT
)
1741 return ERR_PTR(-EINVAL
);
1744 return ERR_PTR(-EINVAL
);
1746 rdev
= kzalloc(sizeof(struct regulator_dev
), GFP_KERNEL
);
1748 return ERR_PTR(-ENOMEM
);
1750 mutex_lock(®ulator_list_mutex
);
1752 mutex_init(&rdev
->mutex
);
1753 rdev
->reg_data
= driver_data
;
1754 rdev
->owner
= regulator_desc
->owner
;
1755 rdev
->desc
= regulator_desc
;
1756 INIT_LIST_HEAD(&rdev
->consumer_list
);
1757 INIT_LIST_HEAD(&rdev
->supply_list
);
1758 INIT_LIST_HEAD(&rdev
->list
);
1759 INIT_LIST_HEAD(&rdev
->slist
);
1760 BLOCKING_INIT_NOTIFIER_HEAD(&rdev
->notifier
);
1762 /* preform any regulator specific init */
1763 if (init_data
->regulator_init
) {
1764 ret
= init_data
->regulator_init(rdev
->reg_data
);
1767 rdev
= ERR_PTR(ret
);
1772 /* set regulator constraints */
1773 ret
= set_machine_constraints(rdev
, &init_data
->constraints
);
1776 rdev
= ERR_PTR(ret
);
1780 /* register with sysfs */
1781 rdev
->dev
.class = ®ulator_class
;
1782 rdev
->dev
.parent
= dev
;
1783 dev_set_name(&rdev
->dev
, "regulator.%d",
1784 atomic_inc_return(®ulator_no
) - 1);
1785 ret
= device_register(&rdev
->dev
);
1788 rdev
= ERR_PTR(ret
);
1792 dev_set_drvdata(&rdev
->dev
, rdev
);
1794 /* set supply regulator if it exists */
1795 if (init_data
->supply_regulator_dev
) {
1796 ret
= set_supply(rdev
,
1797 dev_get_drvdata(init_data
->supply_regulator_dev
));
1799 device_unregister(&rdev
->dev
);
1801 rdev
= ERR_PTR(ret
);
1806 /* add consumers devices */
1807 for (i
= 0; i
< init_data
->num_consumer_supplies
; i
++) {
1808 ret
= set_consumer_device_supply(rdev
,
1809 init_data
->consumer_supplies
[i
].dev
,
1810 init_data
->consumer_supplies
[i
].supply
);
1812 for (--i
; i
>= 0; i
--)
1813 unset_consumer_device_supply(rdev
,
1814 init_data
->consumer_supplies
[i
].dev
);
1815 device_unregister(&rdev
->dev
);
1817 rdev
= ERR_PTR(ret
);
1822 list_add(&rdev
->list
, ®ulator_list
);
1824 mutex_unlock(®ulator_list_mutex
);
1827 EXPORT_SYMBOL_GPL(regulator_register
);
1830 * regulator_unregister - unregister regulator
1831 * @regulator: regulator source
1833 * Called by regulator drivers to unregister a regulator.
1835 void regulator_unregister(struct regulator_dev
*rdev
)
1840 mutex_lock(®ulator_list_mutex
);
1841 list_del(&rdev
->list
);
1843 sysfs_remove_link(&rdev
->dev
.kobj
, "supply");
1844 device_unregister(&rdev
->dev
);
1845 mutex_unlock(®ulator_list_mutex
);
1847 EXPORT_SYMBOL_GPL(regulator_unregister
);
1850 * regulator_suspend_prepare: prepare regulators for system wide suspend
1851 * @state: system suspend state
1853 * Configure each regulator with it's suspend operating parameters for state.
1854 * This will usually be called by machine suspend code prior to supending.
1856 int regulator_suspend_prepare(suspend_state_t state
)
1858 struct regulator_dev
*rdev
;
1861 /* ON is handled by regulator active state */
1862 if (state
== PM_SUSPEND_ON
)
1865 mutex_lock(®ulator_list_mutex
);
1866 list_for_each_entry(rdev
, ®ulator_list
, list
) {
1868 mutex_lock(&rdev
->mutex
);
1869 ret
= suspend_prepare(rdev
, state
);
1870 mutex_unlock(&rdev
->mutex
);
1873 printk(KERN_ERR
"%s: failed to prepare %s\n",
1874 __func__
, rdev
->desc
->name
);
1879 mutex_unlock(®ulator_list_mutex
);
1882 EXPORT_SYMBOL_GPL(regulator_suspend_prepare
);
1885 * rdev_get_drvdata - get rdev regulator driver data
1886 * @regulator: regulator
1888 * Get rdev regulator driver private data. This call can be used in the
1889 * regulator driver context.
1891 void *rdev_get_drvdata(struct regulator_dev
*rdev
)
1893 return rdev
->reg_data
;
1895 EXPORT_SYMBOL_GPL(rdev_get_drvdata
);
1898 * regulator_get_drvdata - get regulator driver data
1899 * @regulator: regulator
1901 * Get regulator driver private data. This call can be used in the consumer
1902 * driver context when non API regulator specific functions need to be called.
1904 void *regulator_get_drvdata(struct regulator
*regulator
)
1906 return regulator
->rdev
->reg_data
;
1908 EXPORT_SYMBOL_GPL(regulator_get_drvdata
);
1911 * regulator_set_drvdata - set regulator driver data
1912 * @regulator: regulator
1915 void regulator_set_drvdata(struct regulator
*regulator
, void *data
)
1917 regulator
->rdev
->reg_data
= data
;
1919 EXPORT_SYMBOL_GPL(regulator_set_drvdata
);
1922 * regulator_get_id - get regulator ID
1923 * @regulator: regulator
1925 int rdev_get_id(struct regulator_dev
*rdev
)
1927 return rdev
->desc
->id
;
1929 EXPORT_SYMBOL_GPL(rdev_get_id
);
1931 struct device
*rdev_get_dev(struct regulator_dev
*rdev
)
1935 EXPORT_SYMBOL_GPL(rdev_get_dev
);
1937 void *regulator_get_init_drvdata(struct regulator_init_data
*reg_init_data
)
1939 return reg_init_data
->driver_data
;
1941 EXPORT_SYMBOL_GPL(regulator_get_init_drvdata
);
1943 static int __init
regulator_init(void)
1945 printk(KERN_INFO
"regulator: core version %s\n", REGULATOR_VERSION
);
1946 return class_register(®ulator_class
);
1949 /* init early to allow our consumers to complete system booting */
1950 core_initcall(regulator_init
);