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
; /* client has called enabled */
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_opmode_show(struct device
*dev
,
245 struct device_attribute
*attr
, char *buf
)
247 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
248 int mode
= _regulator_get_mode(rdev
);
251 case REGULATOR_MODE_FAST
:
252 return sprintf(buf
, "fast\n");
253 case REGULATOR_MODE_NORMAL
:
254 return sprintf(buf
, "normal\n");
255 case REGULATOR_MODE_IDLE
:
256 return sprintf(buf
, "idle\n");
257 case REGULATOR_MODE_STANDBY
:
258 return sprintf(buf
, "standby\n");
260 return sprintf(buf
, "unknown\n");
263 static ssize_t
regulator_state_show(struct device
*dev
,
264 struct device_attribute
*attr
, char *buf
)
266 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
267 int state
= _regulator_is_enabled(rdev
);
270 return sprintf(buf
, "enabled\n");
272 return sprintf(buf
, "disabled\n");
274 return sprintf(buf
, "unknown\n");
277 static ssize_t
regulator_min_uA_show(struct device
*dev
,
278 struct device_attribute
*attr
, char *buf
)
280 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
282 if (!rdev
->constraints
)
283 return sprintf(buf
, "constraint not defined\n");
285 return sprintf(buf
, "%d\n", rdev
->constraints
->min_uA
);
288 static ssize_t
regulator_max_uA_show(struct device
*dev
,
289 struct device_attribute
*attr
, char *buf
)
291 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
293 if (!rdev
->constraints
)
294 return sprintf(buf
, "constraint not defined\n");
296 return sprintf(buf
, "%d\n", rdev
->constraints
->max_uA
);
299 static ssize_t
regulator_min_uV_show(struct device
*dev
,
300 struct device_attribute
*attr
, char *buf
)
302 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
304 if (!rdev
->constraints
)
305 return sprintf(buf
, "constraint not defined\n");
307 return sprintf(buf
, "%d\n", rdev
->constraints
->min_uV
);
310 static ssize_t
regulator_max_uV_show(struct device
*dev
,
311 struct device_attribute
*attr
, char *buf
)
313 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
315 if (!rdev
->constraints
)
316 return sprintf(buf
, "constraint not defined\n");
318 return sprintf(buf
, "%d\n", rdev
->constraints
->max_uV
);
321 static ssize_t
regulator_total_uA_show(struct device
*dev
,
322 struct device_attribute
*attr
, char *buf
)
324 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
325 struct regulator
*regulator
;
328 mutex_lock(&rdev
->mutex
);
329 list_for_each_entry(regulator
, &rdev
->consumer_list
, list
)
330 uA
+= regulator
->uA_load
;
331 mutex_unlock(&rdev
->mutex
);
332 return sprintf(buf
, "%d\n", uA
);
335 static ssize_t
regulator_num_users_show(struct device
*dev
,
336 struct device_attribute
*attr
, char *buf
)
338 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
339 return sprintf(buf
, "%d\n", rdev
->use_count
);
342 static ssize_t
regulator_type_show(struct device
*dev
,
343 struct device_attribute
*attr
, char *buf
)
345 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
347 switch (rdev
->desc
->type
) {
348 case REGULATOR_VOLTAGE
:
349 return sprintf(buf
, "voltage\n");
350 case REGULATOR_CURRENT
:
351 return sprintf(buf
, "current\n");
353 return sprintf(buf
, "unknown\n");
356 static ssize_t
regulator_suspend_mem_uV_show(struct device
*dev
,
357 struct device_attribute
*attr
, char *buf
)
359 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
361 if (!rdev
->constraints
)
362 return sprintf(buf
, "not defined\n");
363 return sprintf(buf
, "%d\n", rdev
->constraints
->state_mem
.uV
);
366 static ssize_t
regulator_suspend_disk_uV_show(struct device
*dev
,
367 struct device_attribute
*attr
, char *buf
)
369 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
371 if (!rdev
->constraints
)
372 return sprintf(buf
, "not defined\n");
373 return sprintf(buf
, "%d\n", rdev
->constraints
->state_disk
.uV
);
376 static ssize_t
regulator_suspend_standby_uV_show(struct device
*dev
,
377 struct device_attribute
*attr
, char *buf
)
379 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
381 if (!rdev
->constraints
)
382 return sprintf(buf
, "not defined\n");
383 return sprintf(buf
, "%d\n", rdev
->constraints
->state_standby
.uV
);
386 static ssize_t
suspend_opmode_show(struct regulator_dev
*rdev
,
387 unsigned int mode
, char *buf
)
390 case REGULATOR_MODE_FAST
:
391 return sprintf(buf
, "fast\n");
392 case REGULATOR_MODE_NORMAL
:
393 return sprintf(buf
, "normal\n");
394 case REGULATOR_MODE_IDLE
:
395 return sprintf(buf
, "idle\n");
396 case REGULATOR_MODE_STANDBY
:
397 return sprintf(buf
, "standby\n");
399 return sprintf(buf
, "unknown\n");
402 static ssize_t
regulator_suspend_mem_mode_show(struct device
*dev
,
403 struct device_attribute
*attr
, char *buf
)
405 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
407 if (!rdev
->constraints
)
408 return sprintf(buf
, "not defined\n");
409 return suspend_opmode_show(rdev
,
410 rdev
->constraints
->state_mem
.mode
, buf
);
413 static ssize_t
regulator_suspend_disk_mode_show(struct device
*dev
,
414 struct device_attribute
*attr
, char *buf
)
416 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
418 if (!rdev
->constraints
)
419 return sprintf(buf
, "not defined\n");
420 return suspend_opmode_show(rdev
,
421 rdev
->constraints
->state_disk
.mode
, buf
);
424 static ssize_t
regulator_suspend_standby_mode_show(struct device
*dev
,
425 struct device_attribute
*attr
, char *buf
)
427 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
429 if (!rdev
->constraints
)
430 return sprintf(buf
, "not defined\n");
431 return suspend_opmode_show(rdev
,
432 rdev
->constraints
->state_standby
.mode
, buf
);
435 static ssize_t
regulator_suspend_mem_state_show(struct device
*dev
,
436 struct device_attribute
*attr
, char *buf
)
438 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
440 if (!rdev
->constraints
)
441 return sprintf(buf
, "not defined\n");
443 if (rdev
->constraints
->state_mem
.enabled
)
444 return sprintf(buf
, "enabled\n");
446 return sprintf(buf
, "disabled\n");
449 static ssize_t
regulator_suspend_disk_state_show(struct device
*dev
,
450 struct device_attribute
*attr
, char *buf
)
452 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
454 if (!rdev
->constraints
)
455 return sprintf(buf
, "not defined\n");
457 if (rdev
->constraints
->state_disk
.enabled
)
458 return sprintf(buf
, "enabled\n");
460 return sprintf(buf
, "disabled\n");
463 static ssize_t
regulator_suspend_standby_state_show(struct device
*dev
,
464 struct device_attribute
*attr
, char *buf
)
466 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
468 if (!rdev
->constraints
)
469 return sprintf(buf
, "not defined\n");
471 if (rdev
->constraints
->state_standby
.enabled
)
472 return sprintf(buf
, "enabled\n");
474 return sprintf(buf
, "disabled\n");
476 static struct device_attribute regulator_dev_attrs
[] = {
477 __ATTR(microvolts
, 0444, regulator_uV_show
, NULL
),
478 __ATTR(microamps
, 0444, regulator_uA_show
, NULL
),
479 __ATTR(opmode
, 0444, regulator_opmode_show
, NULL
),
480 __ATTR(state
, 0444, regulator_state_show
, NULL
),
481 __ATTR(min_microvolts
, 0444, regulator_min_uV_show
, NULL
),
482 __ATTR(min_microamps
, 0444, regulator_min_uA_show
, NULL
),
483 __ATTR(max_microvolts
, 0444, regulator_max_uV_show
, NULL
),
484 __ATTR(max_microamps
, 0444, regulator_max_uA_show
, NULL
),
485 __ATTR(requested_microamps
, 0444, regulator_total_uA_show
, NULL
),
486 __ATTR(num_users
, 0444, regulator_num_users_show
, NULL
),
487 __ATTR(type
, 0444, regulator_type_show
, NULL
),
488 __ATTR(suspend_mem_microvolts
, 0444,
489 regulator_suspend_mem_uV_show
, NULL
),
490 __ATTR(suspend_disk_microvolts
, 0444,
491 regulator_suspend_disk_uV_show
, NULL
),
492 __ATTR(suspend_standby_microvolts
, 0444,
493 regulator_suspend_standby_uV_show
, NULL
),
494 __ATTR(suspend_mem_mode
, 0444,
495 regulator_suspend_mem_mode_show
, NULL
),
496 __ATTR(suspend_disk_mode
, 0444,
497 regulator_suspend_disk_mode_show
, NULL
),
498 __ATTR(suspend_standby_mode
, 0444,
499 regulator_suspend_standby_mode_show
, NULL
),
500 __ATTR(suspend_mem_state
, 0444,
501 regulator_suspend_mem_state_show
, NULL
),
502 __ATTR(suspend_disk_state
, 0444,
503 regulator_suspend_disk_state_show
, NULL
),
504 __ATTR(suspend_standby_state
, 0444,
505 regulator_suspend_standby_state_show
, NULL
),
509 static void regulator_dev_release(struct device
*dev
)
511 struct regulator_dev
*rdev
= dev_get_drvdata(dev
);
515 static struct class regulator_class
= {
517 .dev_release
= regulator_dev_release
,
518 .dev_attrs
= regulator_dev_attrs
,
521 /* Calculate the new optimum regulator operating mode based on the new total
522 * consumer load. All locks held by caller */
523 static void drms_uA_update(struct regulator_dev
*rdev
)
525 struct regulator
*sibling
;
526 int current_uA
= 0, output_uV
, input_uV
, err
;
529 err
= regulator_check_drms(rdev
);
530 if (err
< 0 || !rdev
->desc
->ops
->get_optimum_mode
||
531 !rdev
->desc
->ops
->get_voltage
|| !rdev
->desc
->ops
->set_mode
);
534 /* get output voltage */
535 output_uV
= rdev
->desc
->ops
->get_voltage(rdev
);
539 /* get input voltage */
540 if (rdev
->supply
&& rdev
->supply
->desc
->ops
->get_voltage
)
541 input_uV
= rdev
->supply
->desc
->ops
->get_voltage(rdev
->supply
);
543 input_uV
= rdev
->constraints
->input_uV
;
547 /* calc total requested load */
548 list_for_each_entry(sibling
, &rdev
->consumer_list
, list
)
549 current_uA
+= sibling
->uA_load
;
551 /* now get the optimum mode for our new total regulator load */
552 mode
= rdev
->desc
->ops
->get_optimum_mode(rdev
, input_uV
,
553 output_uV
, current_uA
);
555 /* check the new mode is allowed */
556 err
= regulator_check_mode(rdev
, mode
);
558 rdev
->desc
->ops
->set_mode(rdev
, mode
);
561 static int suspend_set_state(struct regulator_dev
*rdev
,
562 struct regulator_state
*rstate
)
566 /* enable & disable are mandatory for suspend control */
567 if (!rdev
->desc
->ops
->set_suspend_enable
||
568 !rdev
->desc
->ops
->set_suspend_disable
) {
569 printk(KERN_ERR
"%s: no way to set suspend state\n",
575 ret
= rdev
->desc
->ops
->set_suspend_enable(rdev
);
577 ret
= rdev
->desc
->ops
->set_suspend_disable(rdev
);
579 printk(KERN_ERR
"%s: failed to enabled/disable\n", __func__
);
583 if (rdev
->desc
->ops
->set_suspend_voltage
&& rstate
->uV
> 0) {
584 ret
= rdev
->desc
->ops
->set_suspend_voltage(rdev
, rstate
->uV
);
586 printk(KERN_ERR
"%s: failed to set voltage\n",
592 if (rdev
->desc
->ops
->set_suspend_mode
&& rstate
->mode
> 0) {
593 ret
= rdev
->desc
->ops
->set_suspend_mode(rdev
, rstate
->mode
);
595 printk(KERN_ERR
"%s: failed to set mode\n", __func__
);
602 /* locks held by caller */
603 static int suspend_prepare(struct regulator_dev
*rdev
, suspend_state_t state
)
605 if (!rdev
->constraints
)
609 case PM_SUSPEND_STANDBY
:
610 return suspend_set_state(rdev
,
611 &rdev
->constraints
->state_standby
);
613 return suspend_set_state(rdev
,
614 &rdev
->constraints
->state_mem
);
616 return suspend_set_state(rdev
,
617 &rdev
->constraints
->state_disk
);
623 static void print_constraints(struct regulator_dev
*rdev
)
625 struct regulation_constraints
*constraints
= rdev
->constraints
;
629 if (rdev
->desc
->type
== REGULATOR_VOLTAGE
) {
630 if (constraints
->min_uV
== constraints
->max_uV
)
631 count
= sprintf(buf
, "%d mV ",
632 constraints
->min_uV
/ 1000);
634 count
= sprintf(buf
, "%d <--> %d mV ",
635 constraints
->min_uV
/ 1000,
636 constraints
->max_uV
/ 1000);
638 if (constraints
->min_uA
== constraints
->max_uA
)
639 count
= sprintf(buf
, "%d mA ",
640 constraints
->min_uA
/ 1000);
642 count
= sprintf(buf
, "%d <--> %d mA ",
643 constraints
->min_uA
/ 1000,
644 constraints
->max_uA
/ 1000);
646 if (constraints
->valid_modes_mask
& REGULATOR_MODE_FAST
)
647 count
+= sprintf(buf
+ count
, "fast ");
648 if (constraints
->valid_modes_mask
& REGULATOR_MODE_NORMAL
)
649 count
+= sprintf(buf
+ count
, "normal ");
650 if (constraints
->valid_modes_mask
& REGULATOR_MODE_IDLE
)
651 count
+= sprintf(buf
+ count
, "idle ");
652 if (constraints
->valid_modes_mask
& REGULATOR_MODE_STANDBY
)
653 count
+= sprintf(buf
+ count
, "standby");
655 printk(KERN_INFO
"regulator: %s: %s\n", rdev
->desc
->name
, buf
);
659 * set_machine_constraints - sets regulator constraints
660 * @regulator: regulator source
662 * Allows platform initialisation code to define and constrain
663 * regulator circuits e.g. valid voltage/current ranges, etc. NOTE:
664 * Constraints *must* be set by platform code in order for some
665 * regulator operations to proceed i.e. set_voltage, set_current_limit,
668 static int set_machine_constraints(struct regulator_dev
*rdev
,
669 struct regulation_constraints
*constraints
)
674 if (constraints
->name
)
675 name
= constraints
->name
;
676 else if (rdev
->desc
->name
)
677 name
= rdev
->desc
->name
;
681 rdev
->constraints
= constraints
;
683 /* do we need to apply the constraint voltage */
684 if (rdev
->constraints
->apply_uV
&&
685 rdev
->constraints
->min_uV
== rdev
->constraints
->max_uV
&&
686 rdev
->desc
->ops
->set_voltage
) {
687 ret
= rdev
->desc
->ops
->set_voltage(rdev
,
688 rdev
->constraints
->min_uV
, rdev
->constraints
->max_uV
);
690 printk(KERN_ERR
"%s: failed to apply %duV constraint to %s\n",
692 rdev
->constraints
->min_uV
, name
);
693 rdev
->constraints
= NULL
;
698 /* are we enabled at boot time by firmware / bootloader */
699 if (rdev
->constraints
->boot_on
)
702 /* do we need to setup our suspend state */
703 if (constraints
->initial_state
) {
704 ret
= suspend_prepare(rdev
, constraints
->initial_state
);
706 printk(KERN_ERR
"%s: failed to set suspend state for %s\n",
708 rdev
->constraints
= NULL
;
713 print_constraints(rdev
);
719 * set_supply - set regulator supply regulator
720 * @regulator: regulator name
721 * @supply: supply regulator name
723 * Called by platform initialisation code to set the supply regulator for this
724 * regulator. This ensures that a regulators supply will also be enabled by the
725 * core if it's child is enabled.
727 static int set_supply(struct regulator_dev
*rdev
,
728 struct regulator_dev
*supply_rdev
)
732 err
= sysfs_create_link(&rdev
->dev
.kobj
, &supply_rdev
->dev
.kobj
,
736 "%s: could not add device link %s err %d\n",
737 __func__
, supply_rdev
->dev
.kobj
.name
, err
);
740 rdev
->supply
= supply_rdev
;
741 list_add(&rdev
->slist
, &supply_rdev
->supply_list
);
747 * set_consumer_device_supply: Bind a regulator to a symbolic supply
748 * @regulator: regulator source
749 * @dev: device the supply applies to
750 * @supply: symbolic name for supply
752 * Allows platform initialisation code to map physical regulator
753 * sources to symbolic names for supplies for use by devices. Devices
754 * should use these symbolic names to request regulators, avoiding the
755 * need to provide board-specific regulator names as platform data.
757 static int set_consumer_device_supply(struct regulator_dev
*rdev
,
758 struct device
*consumer_dev
, const char *supply
)
760 struct regulator_map
*node
;
765 node
= kmalloc(sizeof(struct regulator_map
), GFP_KERNEL
);
769 node
->regulator
= rdev
;
770 node
->dev
= consumer_dev
;
771 node
->supply
= supply
;
773 list_add(&node
->list
, ®ulator_map_list
);
777 static void unset_consumer_device_supply(struct regulator_dev
*rdev
,
778 struct device
*consumer_dev
)
780 struct regulator_map
*node
, *n
;
782 list_for_each_entry_safe(node
, n
, ®ulator_map_list
, list
) {
783 if (rdev
== node
->regulator
&&
784 consumer_dev
== node
->dev
) {
785 list_del(&node
->list
);
792 #define REG_STR_SIZE 32
794 static struct regulator
*create_regulator(struct regulator_dev
*rdev
,
796 const char *supply_name
)
798 struct regulator
*regulator
;
799 char buf
[REG_STR_SIZE
];
802 regulator
= kzalloc(sizeof(*regulator
), GFP_KERNEL
);
803 if (regulator
== NULL
)
806 mutex_lock(&rdev
->mutex
);
807 regulator
->rdev
= rdev
;
808 list_add(®ulator
->list
, &rdev
->consumer_list
);
811 /* create a 'requested_microamps_name' sysfs entry */
812 size
= scnprintf(buf
, REG_STR_SIZE
, "microamps_requested_%s",
814 if (size
>= REG_STR_SIZE
)
817 regulator
->dev
= dev
;
818 regulator
->dev_attr
.attr
.name
= kstrdup(buf
, GFP_KERNEL
);
819 if (regulator
->dev_attr
.attr
.name
== NULL
)
822 regulator
->dev_attr
.attr
.owner
= THIS_MODULE
;
823 regulator
->dev_attr
.attr
.mode
= 0444;
824 regulator
->dev_attr
.show
= device_requested_uA_show
;
825 err
= device_create_file(dev
, ®ulator
->dev_attr
);
827 printk(KERN_WARNING
"%s: could not add regulator_dev"
828 " load sysfs\n", __func__
);
832 /* also add a link to the device sysfs entry */
833 size
= scnprintf(buf
, REG_STR_SIZE
, "%s-%s",
834 dev
->kobj
.name
, supply_name
);
835 if (size
>= REG_STR_SIZE
)
838 regulator
->supply_name
= kstrdup(buf
, GFP_KERNEL
);
839 if (regulator
->supply_name
== NULL
)
842 err
= sysfs_create_link(&rdev
->dev
.kobj
, &dev
->kobj
,
846 "%s: could not add device link %s err %d\n",
847 __func__
, dev
->kobj
.name
, err
);
848 device_remove_file(dev
, ®ulator
->dev_attr
);
852 mutex_unlock(&rdev
->mutex
);
855 kfree(regulator
->supply_name
);
857 device_remove_file(regulator
->dev
, ®ulator
->dev_attr
);
859 kfree(regulator
->dev_attr
.attr
.name
);
861 list_del(®ulator
->list
);
863 mutex_unlock(&rdev
->mutex
);
868 * regulator_get - lookup and obtain a reference to a regulator.
869 * @dev: device for regulator "consumer"
870 * @id: Supply name or regulator ID.
872 * Returns a struct regulator corresponding to the regulator producer,
873 * or IS_ERR() condition containing errno. Use of supply names
874 * configured via regulator_set_device_supply() is strongly
877 struct regulator
*regulator_get(struct device
*dev
, const char *id
)
879 struct regulator_dev
*rdev
;
880 struct regulator_map
*map
;
881 struct regulator
*regulator
= ERR_PTR(-ENODEV
);
884 printk(KERN_ERR
"regulator: get() with no identifier\n");
888 mutex_lock(®ulator_list_mutex
);
890 list_for_each_entry(map
, ®ulator_map_list
, list
) {
891 if (dev
== map
->dev
&&
892 strcmp(map
->supply
, id
) == 0) {
893 rdev
= map
->regulator
;
897 printk(KERN_ERR
"regulator: Unable to get requested regulator: %s\n",
899 mutex_unlock(®ulator_list_mutex
);
903 if (!try_module_get(rdev
->owner
))
906 regulator
= create_regulator(rdev
, dev
, id
);
907 if (regulator
== NULL
) {
908 regulator
= ERR_PTR(-ENOMEM
);
909 module_put(rdev
->owner
);
913 mutex_unlock(®ulator_list_mutex
);
916 EXPORT_SYMBOL_GPL(regulator_get
);
919 * regulator_put - "free" the regulator source
920 * @regulator: regulator source
922 * Note: drivers must ensure that all regulator_enable calls made on this
923 * regulator source are balanced by regulator_disable calls prior to calling
926 void regulator_put(struct regulator
*regulator
)
928 struct regulator_dev
*rdev
;
930 if (regulator
== NULL
|| IS_ERR(regulator
))
933 if (regulator
->enabled
) {
934 printk(KERN_WARNING
"Releasing supply %s while enabled\n",
935 regulator
->supply_name
);
936 WARN_ON(regulator
->enabled
);
937 regulator_disable(regulator
);
940 mutex_lock(®ulator_list_mutex
);
941 rdev
= regulator
->rdev
;
943 /* remove any sysfs entries */
944 if (regulator
->dev
) {
945 sysfs_remove_link(&rdev
->dev
.kobj
, regulator
->supply_name
);
946 kfree(regulator
->supply_name
);
947 device_remove_file(regulator
->dev
, ®ulator
->dev_attr
);
948 kfree(regulator
->dev_attr
.attr
.name
);
950 list_del(®ulator
->list
);
953 module_put(rdev
->owner
);
954 mutex_unlock(®ulator_list_mutex
);
956 EXPORT_SYMBOL_GPL(regulator_put
);
958 /* locks held by regulator_enable() */
959 static int _regulator_enable(struct regulator_dev
*rdev
)
963 if (!rdev
->constraints
) {
964 printk(KERN_ERR
"%s: %s has no constraints\n",
965 __func__
, rdev
->desc
->name
);
969 /* do we need to enable the supply regulator first */
971 ret
= _regulator_enable(rdev
->supply
);
973 printk(KERN_ERR
"%s: failed to enable %s: %d\n",
974 __func__
, rdev
->desc
->name
, ret
);
979 /* check voltage and requested load before enabling */
980 if (rdev
->desc
->ops
->enable
) {
982 if (rdev
->constraints
&&
983 (rdev
->constraints
->valid_ops_mask
&
984 REGULATOR_CHANGE_DRMS
))
985 drms_uA_update(rdev
);
987 ret
= rdev
->desc
->ops
->enable(rdev
);
989 printk(KERN_ERR
"%s: failed to enable %s: %d\n",
990 __func__
, rdev
->desc
->name
, ret
);
1001 * regulator_enable - enable regulator output
1002 * @regulator: regulator source
1004 * Enable the regulator output at the predefined voltage or current value.
1005 * NOTE: the output value can be set by other drivers, boot loader or may be
1006 * hardwired in the regulator.
1007 * NOTE: calls to regulator_enable() must be balanced with calls to
1008 * regulator_disable().
1010 int regulator_enable(struct regulator
*regulator
)
1014 if (regulator
->enabled
) {
1015 printk(KERN_CRIT
"Regulator %s already enabled\n",
1016 regulator
->supply_name
);
1017 WARN_ON(regulator
->enabled
);
1021 mutex_lock(®ulator
->rdev
->mutex
);
1022 regulator
->enabled
= 1;
1023 ret
= _regulator_enable(regulator
->rdev
);
1025 regulator
->enabled
= 0;
1026 mutex_unlock(®ulator
->rdev
->mutex
);
1029 EXPORT_SYMBOL_GPL(regulator_enable
);
1031 /* locks held by regulator_disable() */
1032 static int _regulator_disable(struct regulator_dev
*rdev
)
1036 /* are we the last user and permitted to disable ? */
1037 if (rdev
->use_count
== 1 && !rdev
->constraints
->always_on
) {
1039 /* we are last user */
1040 if (rdev
->desc
->ops
->disable
) {
1041 ret
= rdev
->desc
->ops
->disable(rdev
);
1043 printk(KERN_ERR
"%s: failed to disable %s\n",
1044 __func__
, rdev
->desc
->name
);
1049 /* decrease our supplies ref count and disable if required */
1051 _regulator_disable(rdev
->supply
);
1053 rdev
->use_count
= 0;
1054 } else if (rdev
->use_count
> 1) {
1056 if (rdev
->constraints
&&
1057 (rdev
->constraints
->valid_ops_mask
&
1058 REGULATOR_CHANGE_DRMS
))
1059 drms_uA_update(rdev
);
1067 * regulator_disable - disable regulator output
1068 * @regulator: regulator source
1070 * Disable the regulator output voltage or current.
1071 * NOTE: this will only disable the regulator output if no other consumer
1072 * devices have it enabled.
1073 * NOTE: calls to regulator_enable() must be balanced with calls to
1074 * regulator_disable().
1076 int regulator_disable(struct regulator
*regulator
)
1080 if (!regulator
->enabled
) {
1081 printk(KERN_ERR
"%s: not in use by this consumer\n",
1086 mutex_lock(®ulator
->rdev
->mutex
);
1087 regulator
->enabled
= 0;
1088 regulator
->uA_load
= 0;
1089 ret
= _regulator_disable(regulator
->rdev
);
1090 mutex_unlock(®ulator
->rdev
->mutex
);
1093 EXPORT_SYMBOL_GPL(regulator_disable
);
1095 /* locks held by regulator_force_disable() */
1096 static int _regulator_force_disable(struct regulator_dev
*rdev
)
1101 if (rdev
->desc
->ops
->disable
) {
1102 /* ah well, who wants to live forever... */
1103 ret
= rdev
->desc
->ops
->disable(rdev
);
1105 printk(KERN_ERR
"%s: failed to force disable %s\n",
1106 __func__
, rdev
->desc
->name
);
1109 /* notify other consumers that power has been forced off */
1110 _notifier_call_chain(rdev
, REGULATOR_EVENT_FORCE_DISABLE
,
1114 /* decrease our supplies ref count and disable if required */
1116 _regulator_disable(rdev
->supply
);
1118 rdev
->use_count
= 0;
1123 * regulator_force_disable - force disable regulator output
1124 * @regulator: regulator source
1126 * Forcibly disable the regulator output voltage or current.
1127 * NOTE: this *will* disable the regulator output even if other consumer
1128 * devices have it enabled. This should be used for situations when device
1129 * damage will likely occur if the regulator is not disabled (e.g. over temp).
1131 int regulator_force_disable(struct regulator
*regulator
)
1135 mutex_lock(®ulator
->rdev
->mutex
);
1136 regulator
->enabled
= 0;
1137 regulator
->uA_load
= 0;
1138 ret
= _regulator_force_disable(regulator
->rdev
);
1139 mutex_unlock(®ulator
->rdev
->mutex
);
1142 EXPORT_SYMBOL_GPL(regulator_force_disable
);
1144 static int _regulator_is_enabled(struct regulator_dev
*rdev
)
1148 mutex_lock(&rdev
->mutex
);
1151 if (!rdev
->desc
->ops
->is_enabled
) {
1156 ret
= rdev
->desc
->ops
->is_enabled(rdev
);
1158 mutex_unlock(&rdev
->mutex
);
1163 * regulator_is_enabled - is the regulator output enabled
1164 * @regulator: regulator source
1166 * Returns zero for disabled otherwise return number of enable requests.
1168 int regulator_is_enabled(struct regulator
*regulator
)
1170 return _regulator_is_enabled(regulator
->rdev
);
1172 EXPORT_SYMBOL_GPL(regulator_is_enabled
);
1175 * regulator_set_voltage - set regulator output voltage
1176 * @regulator: regulator source
1177 * @min_uV: Minimum required voltage in uV
1178 * @max_uV: Maximum acceptable voltage in uV
1180 * Sets a voltage regulator to the desired output voltage. This can be set
1181 * during any regulator state. IOW, regulator can be disabled or enabled.
1183 * If the regulator is enabled then the voltage will change to the new value
1184 * immediately otherwise if the regulator is disabled the regulator will
1185 * output at the new voltage when enabled.
1187 * NOTE: If the regulator is shared between several devices then the lowest
1188 * request voltage that meets the system constraints will be used.
1189 * NOTE: Regulator system constraints must be set for this regulator before
1190 * calling this function otherwise this call will fail.
1192 int regulator_set_voltage(struct regulator
*regulator
, int min_uV
, int max_uV
)
1194 struct regulator_dev
*rdev
= regulator
->rdev
;
1197 mutex_lock(&rdev
->mutex
);
1200 if (!rdev
->desc
->ops
->set_voltage
) {
1205 /* constraints check */
1206 ret
= regulator_check_voltage(rdev
, &min_uV
, &max_uV
);
1209 regulator
->min_uV
= min_uV
;
1210 regulator
->max_uV
= max_uV
;
1211 ret
= rdev
->desc
->ops
->set_voltage(rdev
, min_uV
, max_uV
);
1214 mutex_unlock(&rdev
->mutex
);
1217 EXPORT_SYMBOL_GPL(regulator_set_voltage
);
1219 static int _regulator_get_voltage(struct regulator_dev
*rdev
)
1222 if (rdev
->desc
->ops
->get_voltage
)
1223 return rdev
->desc
->ops
->get_voltage(rdev
);
1229 * regulator_get_voltage - get regulator output voltage
1230 * @regulator: regulator source
1232 * This returns the current regulator voltage in uV.
1234 * NOTE: If the regulator is disabled it will return the voltage value. This
1235 * function should not be used to determine regulator state.
1237 int regulator_get_voltage(struct regulator
*regulator
)
1241 mutex_lock(®ulator
->rdev
->mutex
);
1243 ret
= _regulator_get_voltage(regulator
->rdev
);
1245 mutex_unlock(®ulator
->rdev
->mutex
);
1249 EXPORT_SYMBOL_GPL(regulator_get_voltage
);
1252 * regulator_set_current_limit - set regulator output current limit
1253 * @regulator: regulator source
1254 * @min_uA: Minimuum supported current in uA
1255 * @max_uA: Maximum supported current in uA
1257 * Sets current sink to the desired output current. This can be set during
1258 * any regulator state. IOW, regulator can be disabled or enabled.
1260 * If the regulator is enabled then the current will change to the new value
1261 * immediately otherwise if the regulator is disabled the regulator will
1262 * output at the new current when enabled.
1264 * NOTE: Regulator system constraints must be set for this regulator before
1265 * calling this function otherwise this call will fail.
1267 int regulator_set_current_limit(struct regulator
*regulator
,
1268 int min_uA
, int max_uA
)
1270 struct regulator_dev
*rdev
= regulator
->rdev
;
1273 mutex_lock(&rdev
->mutex
);
1276 if (!rdev
->desc
->ops
->set_current_limit
) {
1281 /* constraints check */
1282 ret
= regulator_check_current_limit(rdev
, &min_uA
, &max_uA
);
1286 ret
= rdev
->desc
->ops
->set_current_limit(rdev
, min_uA
, max_uA
);
1288 mutex_unlock(&rdev
->mutex
);
1291 EXPORT_SYMBOL_GPL(regulator_set_current_limit
);
1293 static int _regulator_get_current_limit(struct regulator_dev
*rdev
)
1297 mutex_lock(&rdev
->mutex
);
1300 if (!rdev
->desc
->ops
->get_current_limit
) {
1305 ret
= rdev
->desc
->ops
->get_current_limit(rdev
);
1307 mutex_unlock(&rdev
->mutex
);
1312 * regulator_get_current_limit - get regulator output current
1313 * @regulator: regulator source
1315 * This returns the current supplied by the specified current sink in uA.
1317 * NOTE: If the regulator is disabled it will return the current value. This
1318 * function should not be used to determine regulator state.
1320 int regulator_get_current_limit(struct regulator
*regulator
)
1322 return _regulator_get_current_limit(regulator
->rdev
);
1324 EXPORT_SYMBOL_GPL(regulator_get_current_limit
);
1327 * regulator_set_mode - set regulator operating mode
1328 * @regulator: regulator source
1329 * @mode: operating mode - one of the REGULATOR_MODE constants
1331 * Set regulator operating mode to increase regulator efficiency or improve
1332 * regulation performance.
1334 * NOTE: Regulator system constraints must be set for this regulator before
1335 * calling this function otherwise this call will fail.
1337 int regulator_set_mode(struct regulator
*regulator
, unsigned int mode
)
1339 struct regulator_dev
*rdev
= regulator
->rdev
;
1342 mutex_lock(&rdev
->mutex
);
1345 if (!rdev
->desc
->ops
->set_mode
) {
1350 /* constraints check */
1351 ret
= regulator_check_mode(rdev
, mode
);
1355 ret
= rdev
->desc
->ops
->set_mode(rdev
, mode
);
1357 mutex_unlock(&rdev
->mutex
);
1360 EXPORT_SYMBOL_GPL(regulator_set_mode
);
1362 static unsigned int _regulator_get_mode(struct regulator_dev
*rdev
)
1366 mutex_lock(&rdev
->mutex
);
1369 if (!rdev
->desc
->ops
->get_mode
) {
1374 ret
= rdev
->desc
->ops
->get_mode(rdev
);
1376 mutex_unlock(&rdev
->mutex
);
1381 * regulator_get_mode - get regulator operating mode
1382 * @regulator: regulator source
1384 * Get the current regulator operating mode.
1386 unsigned int regulator_get_mode(struct regulator
*regulator
)
1388 return _regulator_get_mode(regulator
->rdev
);
1390 EXPORT_SYMBOL_GPL(regulator_get_mode
);
1393 * regulator_set_optimum_mode - set regulator optimum operating mode
1394 * @regulator: regulator source
1395 * @uA_load: load current
1397 * Notifies the regulator core of a new device load. This is then used by
1398 * DRMS (if enabled by constraints) to set the most efficient regulator
1399 * operating mode for the new regulator loading.
1401 * Consumer devices notify their supply regulator of the maximum power
1402 * they will require (can be taken from device datasheet in the power
1403 * consumption tables) when they change operational status and hence power
1404 * state. Examples of operational state changes that can affect power
1405 * consumption are :-
1407 * o Device is opened / closed.
1408 * o Device I/O is about to begin or has just finished.
1409 * o Device is idling in between work.
1411 * This information is also exported via sysfs to userspace.
1413 * DRMS will sum the total requested load on the regulator and change
1414 * to the most efficient operating mode if platform constraints allow.
1416 * Returns the new regulator mode or error.
1418 int regulator_set_optimum_mode(struct regulator
*regulator
, int uA_load
)
1420 struct regulator_dev
*rdev
= regulator
->rdev
;
1421 struct regulator
*consumer
;
1422 int ret
, output_uV
, input_uV
, total_uA_load
= 0;
1425 mutex_lock(&rdev
->mutex
);
1427 regulator
->uA_load
= uA_load
;
1428 ret
= regulator_check_drms(rdev
);
1434 if (!rdev
->desc
->ops
->get_optimum_mode
)
1437 /* get output voltage */
1438 output_uV
= rdev
->desc
->ops
->get_voltage(rdev
);
1439 if (output_uV
<= 0) {
1440 printk(KERN_ERR
"%s: invalid output voltage found for %s\n",
1441 __func__
, rdev
->desc
->name
);
1445 /* get input voltage */
1446 if (rdev
->supply
&& rdev
->supply
->desc
->ops
->get_voltage
)
1447 input_uV
= rdev
->supply
->desc
->ops
->get_voltage(rdev
->supply
);
1449 input_uV
= rdev
->constraints
->input_uV
;
1450 if (input_uV
<= 0) {
1451 printk(KERN_ERR
"%s: invalid input voltage found for %s\n",
1452 __func__
, rdev
->desc
->name
);
1456 /* calc total requested load for this regulator */
1457 list_for_each_entry(consumer
, &rdev
->consumer_list
, list
)
1458 total_uA_load
+= consumer
->uA_load
;
1460 mode
= rdev
->desc
->ops
->get_optimum_mode(rdev
,
1461 input_uV
, output_uV
,
1464 printk(KERN_ERR
"%s: failed to get optimum mode for %s @"
1465 " %d uA %d -> %d uV\n", __func__
, rdev
->desc
->name
,
1466 total_uA_load
, input_uV
, output_uV
);
1470 ret
= rdev
->desc
->ops
->set_mode(rdev
, mode
);
1472 printk(KERN_ERR
"%s: failed to set optimum mode %x for %s\n",
1473 __func__
, mode
, rdev
->desc
->name
);
1478 mutex_unlock(&rdev
->mutex
);
1481 EXPORT_SYMBOL_GPL(regulator_set_optimum_mode
);
1484 * regulator_register_notifier - register regulator event notifier
1485 * @regulator: regulator source
1486 * @notifier_block: notifier block
1488 * Register notifier block to receive regulator events.
1490 int regulator_register_notifier(struct regulator
*regulator
,
1491 struct notifier_block
*nb
)
1493 return blocking_notifier_chain_register(®ulator
->rdev
->notifier
,
1496 EXPORT_SYMBOL_GPL(regulator_register_notifier
);
1499 * regulator_unregister_notifier - unregister regulator event notifier
1500 * @regulator: regulator source
1501 * @notifier_block: notifier block
1503 * Unregister regulator event notifier block.
1505 int regulator_unregister_notifier(struct regulator
*regulator
,
1506 struct notifier_block
*nb
)
1508 return blocking_notifier_chain_unregister(®ulator
->rdev
->notifier
,
1511 EXPORT_SYMBOL_GPL(regulator_unregister_notifier
);
1513 /* notify regulator consumers and downstream regulator consumers */
1514 static void _notifier_call_chain(struct regulator_dev
*rdev
,
1515 unsigned long event
, void *data
)
1517 struct regulator_dev
*_rdev
;
1519 /* call rdev chain first */
1520 mutex_lock(&rdev
->mutex
);
1521 blocking_notifier_call_chain(&rdev
->notifier
, event
, NULL
);
1522 mutex_unlock(&rdev
->mutex
);
1524 /* now notify regulator we supply */
1525 list_for_each_entry(_rdev
, &rdev
->supply_list
, slist
)
1526 _notifier_call_chain(_rdev
, event
, data
);
1530 * regulator_bulk_get - get multiple regulator consumers
1532 * @dev: Device to supply
1533 * @num_consumers: Number of consumers to register
1534 * @consumers: Configuration of consumers; clients are stored here.
1536 * @return 0 on success, an errno on failure.
1538 * This helper function allows drivers to get several regulator
1539 * consumers in one operation. If any of the regulators cannot be
1540 * acquired then any regulators that were allocated will be freed
1541 * before returning to the caller.
1543 int regulator_bulk_get(struct device
*dev
, int num_consumers
,
1544 struct regulator_bulk_data
*consumers
)
1549 for (i
= 0; i
< num_consumers
; i
++)
1550 consumers
[i
].consumer
= NULL
;
1552 for (i
= 0; i
< num_consumers
; i
++) {
1553 consumers
[i
].consumer
= regulator_get(dev
,
1554 consumers
[i
].supply
);
1555 if (IS_ERR(consumers
[i
].consumer
)) {
1556 dev_err(dev
, "Failed to get supply '%s'\n",
1557 consumers
[i
].supply
);
1558 ret
= PTR_ERR(consumers
[i
].consumer
);
1559 consumers
[i
].consumer
= NULL
;
1567 for (i
= 0; i
< num_consumers
&& consumers
[i
].consumer
; i
++)
1568 regulator_put(consumers
[i
].consumer
);
1572 EXPORT_SYMBOL_GPL(regulator_bulk_get
);
1575 * regulator_bulk_enable - enable multiple regulator consumers
1577 * @num_consumers: Number of consumers
1578 * @consumers: Consumer data; clients are stored here.
1579 * @return 0 on success, an errno on failure
1581 * This convenience API allows consumers to enable multiple regulator
1582 * clients in a single API call. If any consumers cannot be enabled
1583 * then any others that were enabled will be disabled again prior to
1586 int regulator_bulk_enable(int num_consumers
,
1587 struct regulator_bulk_data
*consumers
)
1592 for (i
= 0; i
< num_consumers
; i
++) {
1593 ret
= regulator_enable(consumers
[i
].consumer
);
1601 printk(KERN_ERR
"Failed to enable %s\n", consumers
[i
].supply
);
1602 for (i
= 0; i
< num_consumers
; i
++)
1603 regulator_disable(consumers
[i
].consumer
);
1607 EXPORT_SYMBOL_GPL(regulator_bulk_enable
);
1610 * regulator_bulk_disable - disable multiple regulator consumers
1612 * @num_consumers: Number of consumers
1613 * @consumers: Consumer data; clients are stored here.
1614 * @return 0 on success, an errno on failure
1616 * This convenience API allows consumers to disable multiple regulator
1617 * clients in a single API call. If any consumers cannot be enabled
1618 * then any others that were disabled will be disabled again prior to
1621 int regulator_bulk_disable(int num_consumers
,
1622 struct regulator_bulk_data
*consumers
)
1627 for (i
= 0; i
< num_consumers
; i
++) {
1628 ret
= regulator_disable(consumers
[i
].consumer
);
1636 printk(KERN_ERR
"Failed to disable %s\n", consumers
[i
].supply
);
1637 for (i
= 0; i
< num_consumers
; i
++)
1638 regulator_enable(consumers
[i
].consumer
);
1642 EXPORT_SYMBOL_GPL(regulator_bulk_disable
);
1645 * regulator_bulk_free - free multiple regulator consumers
1647 * @num_consumers: Number of consumers
1648 * @consumers: Consumer data; clients are stored here.
1650 * This convenience API allows consumers to free multiple regulator
1651 * clients in a single API call.
1653 void regulator_bulk_free(int num_consumers
,
1654 struct regulator_bulk_data
*consumers
)
1658 for (i
= 0; i
< num_consumers
; i
++) {
1659 regulator_put(consumers
[i
].consumer
);
1660 consumers
[i
].consumer
= NULL
;
1663 EXPORT_SYMBOL_GPL(regulator_bulk_free
);
1666 * regulator_notifier_call_chain - call regulator event notifier
1667 * @regulator: regulator source
1668 * @event: notifier block
1671 * Called by regulator drivers to notify clients a regulator event has
1672 * occurred. We also notify regulator clients downstream.
1674 int regulator_notifier_call_chain(struct regulator_dev
*rdev
,
1675 unsigned long event
, void *data
)
1677 _notifier_call_chain(rdev
, event
, data
);
1681 EXPORT_SYMBOL_GPL(regulator_notifier_call_chain
);
1684 * regulator_register - register regulator
1685 * @regulator: regulator source
1686 * @reg_data: private regulator data
1688 * Called by regulator drivers to register a regulator.
1689 * Returns 0 on success.
1691 struct regulator_dev
*regulator_register(struct regulator_desc
*regulator_desc
,
1692 struct device
*dev
, void *driver_data
)
1694 static atomic_t regulator_no
= ATOMIC_INIT(0);
1695 struct regulator_dev
*rdev
;
1696 struct regulator_init_data
*init_data
= dev
->platform_data
;
1699 if (regulator_desc
== NULL
)
1700 return ERR_PTR(-EINVAL
);
1702 if (regulator_desc
->name
== NULL
|| regulator_desc
->ops
== NULL
)
1703 return ERR_PTR(-EINVAL
);
1705 if (!regulator_desc
->type
== REGULATOR_VOLTAGE
&&
1706 !regulator_desc
->type
== REGULATOR_CURRENT
)
1707 return ERR_PTR(-EINVAL
);
1710 return ERR_PTR(-EINVAL
);
1712 rdev
= kzalloc(sizeof(struct regulator_dev
), GFP_KERNEL
);
1714 return ERR_PTR(-ENOMEM
);
1716 mutex_lock(®ulator_list_mutex
);
1718 mutex_init(&rdev
->mutex
);
1719 rdev
->reg_data
= driver_data
;
1720 rdev
->owner
= regulator_desc
->owner
;
1721 rdev
->desc
= regulator_desc
;
1722 INIT_LIST_HEAD(&rdev
->consumer_list
);
1723 INIT_LIST_HEAD(&rdev
->supply_list
);
1724 INIT_LIST_HEAD(&rdev
->list
);
1725 INIT_LIST_HEAD(&rdev
->slist
);
1726 BLOCKING_INIT_NOTIFIER_HEAD(&rdev
->notifier
);
1728 /* preform any regulator specific init */
1729 if (init_data
->regulator_init
) {
1730 ret
= init_data
->regulator_init(rdev
->reg_data
);
1733 rdev
= ERR_PTR(ret
);
1738 /* set regulator constraints */
1739 ret
= set_machine_constraints(rdev
, &init_data
->constraints
);
1742 rdev
= ERR_PTR(ret
);
1746 /* register with sysfs */
1747 rdev
->dev
.class = ®ulator_class
;
1748 rdev
->dev
.parent
= dev
;
1749 snprintf(rdev
->dev
.bus_id
, sizeof(rdev
->dev
.bus_id
),
1750 "regulator.%d", atomic_inc_return(®ulator_no
) - 1);
1751 ret
= device_register(&rdev
->dev
);
1754 rdev
= ERR_PTR(ret
);
1758 dev_set_drvdata(&rdev
->dev
, rdev
);
1760 /* set supply regulator if it exists */
1761 if (init_data
->supply_regulator_dev
) {
1762 ret
= set_supply(rdev
,
1763 dev_get_drvdata(init_data
->supply_regulator_dev
));
1765 device_unregister(&rdev
->dev
);
1767 rdev
= ERR_PTR(ret
);
1772 /* add consumers devices */
1773 for (i
= 0; i
< init_data
->num_consumer_supplies
; i
++) {
1774 ret
= set_consumer_device_supply(rdev
,
1775 init_data
->consumer_supplies
[i
].dev
,
1776 init_data
->consumer_supplies
[i
].supply
);
1778 for (--i
; i
>= 0; i
--)
1779 unset_consumer_device_supply(rdev
,
1780 init_data
->consumer_supplies
[i
].dev
);
1781 device_unregister(&rdev
->dev
);
1783 rdev
= ERR_PTR(ret
);
1788 list_add(&rdev
->list
, ®ulator_list
);
1790 mutex_unlock(®ulator_list_mutex
);
1793 EXPORT_SYMBOL_GPL(regulator_register
);
1796 * regulator_unregister - unregister regulator
1797 * @regulator: regulator source
1799 * Called by regulator drivers to unregister a regulator.
1801 void regulator_unregister(struct regulator_dev
*rdev
)
1806 mutex_lock(®ulator_list_mutex
);
1807 list_del(&rdev
->list
);
1809 sysfs_remove_link(&rdev
->dev
.kobj
, "supply");
1810 device_unregister(&rdev
->dev
);
1811 mutex_unlock(®ulator_list_mutex
);
1813 EXPORT_SYMBOL_GPL(regulator_unregister
);
1816 * regulator_suspend_prepare: prepare regulators for system wide suspend
1817 * @state: system suspend state
1819 * Configure each regulator with it's suspend operating parameters for state.
1820 * This will usually be called by machine suspend code prior to supending.
1822 int regulator_suspend_prepare(suspend_state_t state
)
1824 struct regulator_dev
*rdev
;
1827 /* ON is handled by regulator active state */
1828 if (state
== PM_SUSPEND_ON
)
1831 mutex_lock(®ulator_list_mutex
);
1832 list_for_each_entry(rdev
, ®ulator_list
, list
) {
1834 mutex_lock(&rdev
->mutex
);
1835 ret
= suspend_prepare(rdev
, state
);
1836 mutex_unlock(&rdev
->mutex
);
1839 printk(KERN_ERR
"%s: failed to prepare %s\n",
1840 __func__
, rdev
->desc
->name
);
1845 mutex_unlock(®ulator_list_mutex
);
1848 EXPORT_SYMBOL_GPL(regulator_suspend_prepare
);
1851 * rdev_get_drvdata - get rdev regulator driver data
1852 * @regulator: regulator
1854 * Get rdev regulator driver private data. This call can be used in the
1855 * regulator driver context.
1857 void *rdev_get_drvdata(struct regulator_dev
*rdev
)
1859 return rdev
->reg_data
;
1861 EXPORT_SYMBOL_GPL(rdev_get_drvdata
);
1864 * regulator_get_drvdata - get regulator driver data
1865 * @regulator: regulator
1867 * Get regulator driver private data. This call can be used in the consumer
1868 * driver context when non API regulator specific functions need to be called.
1870 void *regulator_get_drvdata(struct regulator
*regulator
)
1872 return regulator
->rdev
->reg_data
;
1874 EXPORT_SYMBOL_GPL(regulator_get_drvdata
);
1877 * regulator_set_drvdata - set regulator driver data
1878 * @regulator: regulator
1881 void regulator_set_drvdata(struct regulator
*regulator
, void *data
)
1883 regulator
->rdev
->reg_data
= data
;
1885 EXPORT_SYMBOL_GPL(regulator_set_drvdata
);
1888 * regulator_get_id - get regulator ID
1889 * @regulator: regulator
1891 int rdev_get_id(struct regulator_dev
*rdev
)
1893 return rdev
->desc
->id
;
1895 EXPORT_SYMBOL_GPL(rdev_get_id
);
1897 struct device
*rdev_get_dev(struct regulator_dev
*rdev
)
1901 EXPORT_SYMBOL_GPL(rdev_get_dev
);
1903 void *regulator_get_init_drvdata(struct regulator_init_data
*reg_init_data
)
1905 return reg_init_data
->driver_data
;
1907 EXPORT_SYMBOL_GPL(regulator_get_init_drvdata
);
1909 static int __init
regulator_init(void)
1911 printk(KERN_INFO
"regulator: core version %s\n", REGULATOR_VERSION
);
1912 return class_register(®ulator_class
);
1915 /* init early to allow our consumers to complete system booting */
1916 core_initcall(regulator_init
);