2 * Generic OPP Interface
4 * Copyright (C) 2009-2010 Texas Instruments Incorporated.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16 #include <linux/clk.h>
17 #include <linux/errno.h>
18 #include <linux/err.h>
19 #include <linux/slab.h>
20 #include <linux/device.h>
21 #include <linux/export.h>
22 #include <linux/regulator/consumer.h>
27 * The root of the list of all opp-tables. All opp_table structures branch off
28 * from here, with each opp_table containing the list of opps it supports in
29 * various states of availability.
31 LIST_HEAD(opp_tables
);
32 /* Lock to allow exclusive modification to the device and opp lists */
33 DEFINE_MUTEX(opp_table_lock
);
35 static void dev_pm_opp_get(struct dev_pm_opp
*opp
);
37 static struct opp_device
*_find_opp_dev(const struct device
*dev
,
38 struct opp_table
*opp_table
)
40 struct opp_device
*opp_dev
;
42 list_for_each_entry(opp_dev
, &opp_table
->dev_list
, node
)
43 if (opp_dev
->dev
== dev
)
49 static struct opp_table
*_find_opp_table_unlocked(struct device
*dev
)
51 struct opp_table
*opp_table
;
53 list_for_each_entry(opp_table
, &opp_tables
, node
) {
54 if (_find_opp_dev(dev
, opp_table
)) {
55 _get_opp_table_kref(opp_table
);
61 return ERR_PTR(-ENODEV
);
65 * _find_opp_table() - find opp_table struct using device pointer
66 * @dev: device pointer used to lookup OPP table
68 * Search OPP table for one containing matching device.
70 * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or
71 * -EINVAL based on type of error.
73 * The callers must call dev_pm_opp_put_opp_table() after the table is used.
75 struct opp_table
*_find_opp_table(struct device
*dev
)
77 struct opp_table
*opp_table
;
79 if (IS_ERR_OR_NULL(dev
)) {
80 pr_err("%s: Invalid parameters\n", __func__
);
81 return ERR_PTR(-EINVAL
);
84 mutex_lock(&opp_table_lock
);
85 opp_table
= _find_opp_table_unlocked(dev
);
86 mutex_unlock(&opp_table_lock
);
92 * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp
93 * @opp: opp for which voltage has to be returned for
95 * Return: voltage in micro volt corresponding to the opp, else
98 * This is useful only for devices with single power supply.
100 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp
*opp
)
102 if (IS_ERR_OR_NULL(opp
)) {
103 pr_err("%s: Invalid parameters\n", __func__
);
107 return opp
->supplies
[0].u_volt
;
109 EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage
);
112 * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp
113 * @opp: opp for which frequency has to be returned for
115 * Return: frequency in hertz corresponding to the opp, else
118 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp
*opp
)
120 if (IS_ERR_OR_NULL(opp
) || !opp
->available
) {
121 pr_err("%s: Invalid parameters\n", __func__
);
127 EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq
);
130 * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
131 * @opp: opp for which turbo mode is being verified
133 * Turbo OPPs are not for normal use, and can be enabled (under certain
134 * conditions) for short duration of times to finish high throughput work
135 * quickly. Running on them for longer times may overheat the chip.
137 * Return: true if opp is turbo opp, else false.
139 bool dev_pm_opp_is_turbo(struct dev_pm_opp
*opp
)
141 if (IS_ERR_OR_NULL(opp
) || !opp
->available
) {
142 pr_err("%s: Invalid parameters\n", __func__
);
148 EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo
);
151 * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds
152 * @dev: device for which we do this operation
154 * Return: This function returns the max clock latency in nanoseconds.
156 unsigned long dev_pm_opp_get_max_clock_latency(struct device
*dev
)
158 struct opp_table
*opp_table
;
159 unsigned long clock_latency_ns
;
161 opp_table
= _find_opp_table(dev
);
162 if (IS_ERR(opp_table
))
165 clock_latency_ns
= opp_table
->clock_latency_ns_max
;
167 dev_pm_opp_put_opp_table(opp_table
);
169 return clock_latency_ns
;
171 EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency
);
174 * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds
175 * @dev: device for which we do this operation
177 * Return: This function returns the max voltage latency in nanoseconds.
179 unsigned long dev_pm_opp_get_max_volt_latency(struct device
*dev
)
181 struct opp_table
*opp_table
;
182 struct dev_pm_opp
*opp
;
183 struct regulator
*reg
, **regulators
;
184 unsigned long latency_ns
= 0;
191 opp_table
= _find_opp_table(dev
);
192 if (IS_ERR(opp_table
))
195 count
= opp_table
->regulator_count
;
197 /* Regulator may not be required for the device */
201 regulators
= kmalloc_array(count
, sizeof(*regulators
), GFP_KERNEL
);
205 uV
= kmalloc_array(count
, sizeof(*uV
), GFP_KERNEL
);
207 goto free_regulators
;
209 memcpy(regulators
, opp_table
->regulators
, count
* sizeof(*regulators
));
211 mutex_lock(&opp_table
->lock
);
213 for (i
= 0; i
< count
; i
++) {
217 list_for_each_entry(opp
, &opp_table
->opp_list
, node
) {
221 if (opp
->supplies
[i
].u_volt_min
< uV
[i
].min
)
222 uV
[i
].min
= opp
->supplies
[i
].u_volt_min
;
223 if (opp
->supplies
[i
].u_volt_max
> uV
[i
].max
)
224 uV
[i
].max
= opp
->supplies
[i
].u_volt_max
;
228 mutex_unlock(&opp_table
->lock
);
231 * The caller needs to ensure that opp_table (and hence the regulator)
232 * isn't freed, while we are executing this routine.
234 for (i
= 0; i
< count
; i
++) {
236 ret
= regulator_set_voltage_time(reg
, uV
[i
].min
, uV
[i
].max
);
238 latency_ns
+= ret
* 1000;
245 dev_pm_opp_put_opp_table(opp_table
);
249 EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency
);
252 * dev_pm_opp_get_max_transition_latency() - Get max transition latency in
254 * @dev: device for which we do this operation
256 * Return: This function returns the max transition latency, in nanoseconds, to
257 * switch from one OPP to other.
259 unsigned long dev_pm_opp_get_max_transition_latency(struct device
*dev
)
261 return dev_pm_opp_get_max_volt_latency(dev
) +
262 dev_pm_opp_get_max_clock_latency(dev
);
264 EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency
);
267 * dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz
268 * @dev: device for which we do this operation
270 * Return: This function returns the frequency of the OPP marked as suspend_opp
271 * if one is available, else returns 0;
273 unsigned long dev_pm_opp_get_suspend_opp_freq(struct device
*dev
)
275 struct opp_table
*opp_table
;
276 unsigned long freq
= 0;
278 opp_table
= _find_opp_table(dev
);
279 if (IS_ERR(opp_table
))
282 if (opp_table
->suspend_opp
&& opp_table
->suspend_opp
->available
)
283 freq
= dev_pm_opp_get_freq(opp_table
->suspend_opp
);
285 dev_pm_opp_put_opp_table(opp_table
);
289 EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq
);
292 * dev_pm_opp_get_opp_count() - Get number of opps available in the opp table
293 * @dev: device for which we do this operation
295 * Return: This function returns the number of available opps if there are any,
296 * else returns 0 if none or the corresponding error value.
298 int dev_pm_opp_get_opp_count(struct device
*dev
)
300 struct opp_table
*opp_table
;
301 struct dev_pm_opp
*temp_opp
;
304 opp_table
= _find_opp_table(dev
);
305 if (IS_ERR(opp_table
)) {
306 count
= PTR_ERR(opp_table
);
307 dev_err(dev
, "%s: OPP table not found (%d)\n",
312 mutex_lock(&opp_table
->lock
);
314 list_for_each_entry(temp_opp
, &opp_table
->opp_list
, node
) {
315 if (temp_opp
->available
)
319 mutex_unlock(&opp_table
->lock
);
320 dev_pm_opp_put_opp_table(opp_table
);
324 EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count
);
327 * dev_pm_opp_find_freq_exact() - search for an exact frequency
328 * @dev: device for which we do this operation
329 * @freq: frequency to search for
330 * @available: true/false - match for available opp
332 * Return: Searches for exact match in the opp table and returns pointer to the
333 * matching opp if found, else returns ERR_PTR in case of error and should
334 * be handled using IS_ERR. Error return values can be:
335 * EINVAL: for bad pointer
336 * ERANGE: no match found for search
337 * ENODEV: if device not found in list of registered devices
339 * Note: available is a modifier for the search. if available=true, then the
340 * match is for exact matching frequency and is available in the stored OPP
341 * table. if false, the match is for exact frequency which is not available.
343 * This provides a mechanism to enable an opp which is not available currently
344 * or the opposite as well.
346 * The callers are required to call dev_pm_opp_put() for the returned OPP after
349 struct dev_pm_opp
*dev_pm_opp_find_freq_exact(struct device
*dev
,
353 struct opp_table
*opp_table
;
354 struct dev_pm_opp
*temp_opp
, *opp
= ERR_PTR(-ERANGE
);
356 opp_table
= _find_opp_table(dev
);
357 if (IS_ERR(opp_table
)) {
358 int r
= PTR_ERR(opp_table
);
360 dev_err(dev
, "%s: OPP table not found (%d)\n", __func__
, r
);
364 mutex_lock(&opp_table
->lock
);
366 list_for_each_entry(temp_opp
, &opp_table
->opp_list
, node
) {
367 if (temp_opp
->available
== available
&&
368 temp_opp
->rate
== freq
) {
371 /* Increment the reference count of OPP */
377 mutex_unlock(&opp_table
->lock
);
378 dev_pm_opp_put_opp_table(opp_table
);
382 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact
);
384 static noinline
struct dev_pm_opp
*_find_freq_ceil(struct opp_table
*opp_table
,
387 struct dev_pm_opp
*temp_opp
, *opp
= ERR_PTR(-ERANGE
);
389 mutex_lock(&opp_table
->lock
);
391 list_for_each_entry(temp_opp
, &opp_table
->opp_list
, node
) {
392 if (temp_opp
->available
&& temp_opp
->rate
>= *freq
) {
396 /* Increment the reference count of OPP */
402 mutex_unlock(&opp_table
->lock
);
408 * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq
409 * @dev: device for which we do this operation
410 * @freq: Start frequency
412 * Search for the matching ceil *available* OPP from a starting freq
415 * Return: matching *opp and refreshes *freq accordingly, else returns
416 * ERR_PTR in case of error and should be handled using IS_ERR. Error return
418 * EINVAL: for bad pointer
419 * ERANGE: no match found for search
420 * ENODEV: if device not found in list of registered devices
422 * The callers are required to call dev_pm_opp_put() for the returned OPP after
425 struct dev_pm_opp
*dev_pm_opp_find_freq_ceil(struct device
*dev
,
428 struct opp_table
*opp_table
;
429 struct dev_pm_opp
*opp
;
432 dev_err(dev
, "%s: Invalid argument freq=%p\n", __func__
, freq
);
433 return ERR_PTR(-EINVAL
);
436 opp_table
= _find_opp_table(dev
);
437 if (IS_ERR(opp_table
))
438 return ERR_CAST(opp_table
);
440 opp
= _find_freq_ceil(opp_table
, freq
);
442 dev_pm_opp_put_opp_table(opp_table
);
446 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil
);
449 * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq
450 * @dev: device for which we do this operation
451 * @freq: Start frequency
453 * Search for the matching floor *available* OPP from a starting freq
456 * Return: matching *opp and refreshes *freq accordingly, else returns
457 * ERR_PTR in case of error and should be handled using IS_ERR. Error return
459 * EINVAL: for bad pointer
460 * ERANGE: no match found for search
461 * ENODEV: if device not found in list of registered devices
463 * The callers are required to call dev_pm_opp_put() for the returned OPP after
466 struct dev_pm_opp
*dev_pm_opp_find_freq_floor(struct device
*dev
,
469 struct opp_table
*opp_table
;
470 struct dev_pm_opp
*temp_opp
, *opp
= ERR_PTR(-ERANGE
);
473 dev_err(dev
, "%s: Invalid argument freq=%p\n", __func__
, freq
);
474 return ERR_PTR(-EINVAL
);
477 opp_table
= _find_opp_table(dev
);
478 if (IS_ERR(opp_table
))
479 return ERR_CAST(opp_table
);
481 mutex_lock(&opp_table
->lock
);
483 list_for_each_entry(temp_opp
, &opp_table
->opp_list
, node
) {
484 if (temp_opp
->available
) {
485 /* go to the next node, before choosing prev */
486 if (temp_opp
->rate
> *freq
)
493 /* Increment the reference count of OPP */
496 mutex_unlock(&opp_table
->lock
);
497 dev_pm_opp_put_opp_table(opp_table
);
504 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor
);
506 static int _set_opp_voltage(struct device
*dev
, struct regulator
*reg
,
507 struct dev_pm_opp_supply
*supply
)
511 /* Regulator not available for device */
513 dev_dbg(dev
, "%s: regulator not available: %ld\n", __func__
,
518 dev_dbg(dev
, "%s: voltages (mV): %lu %lu %lu\n", __func__
,
519 supply
->u_volt_min
, supply
->u_volt
, supply
->u_volt_max
);
521 ret
= regulator_set_voltage_triplet(reg
, supply
->u_volt_min
,
522 supply
->u_volt
, supply
->u_volt_max
);
524 dev_err(dev
, "%s: failed to set voltage (%lu %lu %lu mV): %d\n",
525 __func__
, supply
->u_volt_min
, supply
->u_volt
,
526 supply
->u_volt_max
, ret
);
532 _generic_set_opp_clk_only(struct device
*dev
, struct clk
*clk
,
533 unsigned long old_freq
, unsigned long freq
)
537 ret
= clk_set_rate(clk
, freq
);
539 dev_err(dev
, "%s: failed to set clock rate: %d\n", __func__
,
546 static int _generic_set_opp(struct dev_pm_set_opp_data
*data
)
548 struct dev_pm_opp_supply
*old_supply
= data
->old_opp
.supplies
;
549 struct dev_pm_opp_supply
*new_supply
= data
->new_opp
.supplies
;
550 unsigned long old_freq
= data
->old_opp
.rate
, freq
= data
->new_opp
.rate
;
551 struct regulator
*reg
= data
->regulators
[0];
552 struct device
*dev
= data
->dev
;
555 /* This function only supports single regulator per device */
556 if (WARN_ON(data
->regulator_count
> 1)) {
557 dev_err(dev
, "multiple regulators are not supported\n");
561 /* Scaling up? Scale voltage before frequency */
562 if (freq
> old_freq
) {
563 ret
= _set_opp_voltage(dev
, reg
, new_supply
);
565 goto restore_voltage
;
568 /* Change frequency */
569 ret
= _generic_set_opp_clk_only(dev
, data
->clk
, old_freq
, freq
);
571 goto restore_voltage
;
573 /* Scaling down? Scale voltage after frequency */
574 if (freq
< old_freq
) {
575 ret
= _set_opp_voltage(dev
, reg
, new_supply
);
583 if (_generic_set_opp_clk_only(dev
, data
->clk
, freq
, old_freq
))
584 dev_err(dev
, "%s: failed to restore old-freq (%lu Hz)\n",
587 /* This shouldn't harm even if the voltages weren't updated earlier */
588 if (old_supply
->u_volt
)
589 _set_opp_voltage(dev
, reg
, old_supply
);
595 * dev_pm_opp_set_rate() - Configure new OPP based on frequency
596 * @dev: device for which we do this operation
597 * @target_freq: frequency to achieve
599 * This configures the power-supplies and clock source to the levels specified
600 * by the OPP corresponding to the target_freq.
602 int dev_pm_opp_set_rate(struct device
*dev
, unsigned long target_freq
)
604 struct opp_table
*opp_table
;
605 unsigned long freq
, old_freq
;
606 int (*set_opp
)(struct dev_pm_set_opp_data
*data
);
607 struct dev_pm_opp
*old_opp
, *opp
;
608 struct regulator
**regulators
;
609 struct dev_pm_set_opp_data
*data
;
613 if (unlikely(!target_freq
)) {
614 dev_err(dev
, "%s: Invalid target frequency %lu\n", __func__
,
619 opp_table
= _find_opp_table(dev
);
620 if (IS_ERR(opp_table
)) {
621 dev_err(dev
, "%s: device opp doesn't exist\n", __func__
);
622 return PTR_ERR(opp_table
);
625 clk
= opp_table
->clk
;
627 dev_err(dev
, "%s: No clock available for the device\n",
633 freq
= clk_round_rate(clk
, target_freq
);
637 old_freq
= clk_get_rate(clk
);
639 /* Return early if nothing to do */
640 if (old_freq
== freq
) {
641 dev_dbg(dev
, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
647 old_opp
= _find_freq_ceil(opp_table
, &old_freq
);
648 if (IS_ERR(old_opp
)) {
649 dev_err(dev
, "%s: failed to find current OPP for freq %lu (%ld)\n",
650 __func__
, old_freq
, PTR_ERR(old_opp
));
653 opp
= _find_freq_ceil(opp_table
, &freq
);
656 dev_err(dev
, "%s: failed to find OPP for freq %lu (%d)\n",
657 __func__
, freq
, ret
);
661 dev_dbg(dev
, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__
,
664 regulators
= opp_table
->regulators
;
666 /* Only frequency scaling */
668 ret
= _generic_set_opp_clk_only(dev
, clk
, old_freq
, freq
);
672 if (opp_table
->set_opp
)
673 set_opp
= opp_table
->set_opp
;
675 set_opp
= _generic_set_opp
;
677 data
= opp_table
->set_opp_data
;
678 data
->regulators
= regulators
;
679 data
->regulator_count
= opp_table
->regulator_count
;
683 data
->old_opp
.rate
= old_freq
;
684 size
= sizeof(*opp
->supplies
) * opp_table
->regulator_count
;
686 memset(data
->old_opp
.supplies
, 0, size
);
688 memcpy(data
->old_opp
.supplies
, old_opp
->supplies
, size
);
690 data
->new_opp
.rate
= freq
;
691 memcpy(data
->new_opp
.supplies
, opp
->supplies
, size
);
698 if (!IS_ERR(old_opp
))
699 dev_pm_opp_put(old_opp
);
701 dev_pm_opp_put_opp_table(opp_table
);
704 EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate
);
706 /* OPP-dev Helpers */
707 static void _remove_opp_dev(struct opp_device
*opp_dev
,
708 struct opp_table
*opp_table
)
710 opp_debug_unregister(opp_dev
, opp_table
);
711 list_del(&opp_dev
->node
);
715 struct opp_device
*_add_opp_dev(const struct device
*dev
,
716 struct opp_table
*opp_table
)
718 struct opp_device
*opp_dev
;
721 opp_dev
= kzalloc(sizeof(*opp_dev
), GFP_KERNEL
);
725 /* Initialize opp-dev */
727 list_add(&opp_dev
->node
, &opp_table
->dev_list
);
729 /* Create debugfs entries for the opp_table */
730 ret
= opp_debug_register(opp_dev
, opp_table
);
732 dev_err(dev
, "%s: Failed to register opp debugfs (%d)\n",
738 static struct opp_table
*_allocate_opp_table(struct device
*dev
)
740 struct opp_table
*opp_table
;
741 struct opp_device
*opp_dev
;
745 * Allocate a new OPP table. In the infrequent case where a new
746 * device is needed to be added, we pay this penalty.
748 opp_table
= kzalloc(sizeof(*opp_table
), GFP_KERNEL
);
752 INIT_LIST_HEAD(&opp_table
->dev_list
);
754 opp_dev
= _add_opp_dev(dev
, opp_table
);
760 _of_init_opp_table(opp_table
, dev
);
762 /* Find clk for the device */
763 opp_table
->clk
= clk_get(dev
, NULL
);
764 if (IS_ERR(opp_table
->clk
)) {
765 ret
= PTR_ERR(opp_table
->clk
);
766 if (ret
!= -EPROBE_DEFER
)
767 dev_dbg(dev
, "%s: Couldn't find clock: %d\n", __func__
,
771 BLOCKING_INIT_NOTIFIER_HEAD(&opp_table
->head
);
772 INIT_LIST_HEAD(&opp_table
->opp_list
);
773 mutex_init(&opp_table
->lock
);
774 kref_init(&opp_table
->kref
);
776 /* Secure the device table modification */
777 list_add(&opp_table
->node
, &opp_tables
);
781 void _get_opp_table_kref(struct opp_table
*opp_table
)
783 kref_get(&opp_table
->kref
);
786 struct opp_table
*dev_pm_opp_get_opp_table(struct device
*dev
)
788 struct opp_table
*opp_table
;
790 /* Hold our table modification lock here */
791 mutex_lock(&opp_table_lock
);
793 opp_table
= _find_opp_table_unlocked(dev
);
794 if (!IS_ERR(opp_table
))
797 opp_table
= _allocate_opp_table(dev
);
800 mutex_unlock(&opp_table_lock
);
804 EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table
);
806 static void _opp_table_kref_release(struct kref
*kref
)
808 struct opp_table
*opp_table
= container_of(kref
, struct opp_table
, kref
);
809 struct opp_device
*opp_dev
;
812 if (!IS_ERR(opp_table
->clk
))
813 clk_put(opp_table
->clk
);
815 opp_dev
= list_first_entry(&opp_table
->dev_list
, struct opp_device
,
818 _remove_opp_dev(opp_dev
, opp_table
);
820 /* dev_list must be empty now */
821 WARN_ON(!list_empty(&opp_table
->dev_list
));
823 mutex_destroy(&opp_table
->lock
);
824 list_del(&opp_table
->node
);
827 mutex_unlock(&opp_table_lock
);
830 void dev_pm_opp_put_opp_table(struct opp_table
*opp_table
)
832 kref_put_mutex(&opp_table
->kref
, _opp_table_kref_release
,
835 EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table
);
837 void _opp_free(struct dev_pm_opp
*opp
)
842 static void _opp_kref_release(struct kref
*kref
)
844 struct dev_pm_opp
*opp
= container_of(kref
, struct dev_pm_opp
, kref
);
845 struct opp_table
*opp_table
= opp
->opp_table
;
848 * Notify the changes in the availability of the operable
849 * frequency/voltage list.
851 blocking_notifier_call_chain(&opp_table
->head
, OPP_EVENT_REMOVE
, opp
);
852 opp_debug_remove_one(opp
);
853 list_del(&opp
->node
);
856 mutex_unlock(&opp_table
->lock
);
857 dev_pm_opp_put_opp_table(opp_table
);
860 static void dev_pm_opp_get(struct dev_pm_opp
*opp
)
862 kref_get(&opp
->kref
);
865 void dev_pm_opp_put(struct dev_pm_opp
*opp
)
867 kref_put_mutex(&opp
->kref
, _opp_kref_release
, &opp
->opp_table
->lock
);
869 EXPORT_SYMBOL_GPL(dev_pm_opp_put
);
872 * dev_pm_opp_remove() - Remove an OPP from OPP table
873 * @dev: device for which we do this operation
874 * @freq: OPP to remove with matching 'freq'
876 * This function removes an opp from the opp table.
878 void dev_pm_opp_remove(struct device
*dev
, unsigned long freq
)
880 struct dev_pm_opp
*opp
;
881 struct opp_table
*opp_table
;
884 opp_table
= _find_opp_table(dev
);
885 if (IS_ERR(opp_table
))
888 mutex_lock(&opp_table
->lock
);
890 list_for_each_entry(opp
, &opp_table
->opp_list
, node
) {
891 if (opp
->rate
== freq
) {
897 mutex_unlock(&opp_table
->lock
);
902 dev_warn(dev
, "%s: Couldn't find OPP with freq: %lu\n",
906 dev_pm_opp_put_opp_table(opp_table
);
908 EXPORT_SYMBOL_GPL(dev_pm_opp_remove
);
910 struct dev_pm_opp
*_opp_allocate(struct opp_table
*table
)
912 struct dev_pm_opp
*opp
;
913 int count
, supply_size
;
915 /* Allocate space for at least one supply */
916 count
= table
->regulator_count
? table
->regulator_count
: 1;
917 supply_size
= sizeof(*opp
->supplies
) * count
;
919 /* allocate new OPP node and supplies structures */
920 opp
= kzalloc(sizeof(*opp
) + supply_size
, GFP_KERNEL
);
924 /* Put the supplies at the end of the OPP structure as an empty array */
925 opp
->supplies
= (struct dev_pm_opp_supply
*)(opp
+ 1);
926 INIT_LIST_HEAD(&opp
->node
);
931 static bool _opp_supported_by_regulators(struct dev_pm_opp
*opp
,
932 struct opp_table
*opp_table
)
934 struct regulator
*reg
;
937 for (i
= 0; i
< opp_table
->regulator_count
; i
++) {
938 reg
= opp_table
->regulators
[i
];
940 if (!regulator_is_supported_voltage(reg
,
941 opp
->supplies
[i
].u_volt_min
,
942 opp
->supplies
[i
].u_volt_max
)) {
943 pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
944 __func__
, opp
->supplies
[i
].u_volt_min
,
945 opp
->supplies
[i
].u_volt_max
);
955 * 0: On success. And appropriate error message for duplicate OPPs.
956 * -EBUSY: For OPP with same freq/volt and is available. The callers of
957 * _opp_add() must return 0 if they receive -EBUSY from it. This is to make
958 * sure we don't print error messages unnecessarily if different parts of
959 * kernel try to initialize the OPP table.
960 * -EEXIST: For OPP with same freq but different volt or is unavailable. This
961 * should be considered an error by the callers of _opp_add().
963 int _opp_add(struct device
*dev
, struct dev_pm_opp
*new_opp
,
964 struct opp_table
*opp_table
)
966 struct dev_pm_opp
*opp
;
967 struct list_head
*head
;
971 * Insert new OPP in order of increasing frequency and discard if
974 * Need to use &opp_table->opp_list in the condition part of the 'for'
975 * loop, don't replace it with head otherwise it will become an infinite
978 mutex_lock(&opp_table
->lock
);
979 head
= &opp_table
->opp_list
;
981 list_for_each_entry(opp
, &opp_table
->opp_list
, node
) {
982 if (new_opp
->rate
> opp
->rate
) {
987 if (new_opp
->rate
< opp
->rate
)
991 dev_warn(dev
, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
992 __func__
, opp
->rate
, opp
->supplies
[0].u_volt
,
993 opp
->available
, new_opp
->rate
,
994 new_opp
->supplies
[0].u_volt
, new_opp
->available
);
996 /* Should we compare voltages for all regulators here ? */
997 ret
= opp
->available
&&
998 new_opp
->supplies
[0].u_volt
== opp
->supplies
[0].u_volt
? -EBUSY
: -EEXIST
;
1000 mutex_unlock(&opp_table
->lock
);
1004 list_add(&new_opp
->node
, head
);
1005 mutex_unlock(&opp_table
->lock
);
1007 new_opp
->opp_table
= opp_table
;
1008 kref_init(&new_opp
->kref
);
1010 /* Get a reference to the OPP table */
1011 _get_opp_table_kref(opp_table
);
1013 ret
= opp_debug_create_one(new_opp
, opp_table
);
1015 dev_err(dev
, "%s: Failed to register opp to debugfs (%d)\n",
1018 if (!_opp_supported_by_regulators(new_opp
, opp_table
)) {
1019 new_opp
->available
= false;
1020 dev_warn(dev
, "%s: OPP not supported by regulators (%lu)\n",
1021 __func__
, new_opp
->rate
);
1028 * _opp_add_v1() - Allocate a OPP based on v1 bindings.
1029 * @opp_table: OPP table
1030 * @dev: device for which we do this operation
1031 * @freq: Frequency in Hz for this OPP
1032 * @u_volt: Voltage in uVolts for this OPP
1033 * @dynamic: Dynamically added OPPs.
1035 * This function adds an opp definition to the opp table and returns status.
1036 * The opp is made available by default and it can be controlled using
1037 * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove.
1039 * NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table
1040 * and freed by dev_pm_opp_of_remove_table.
1044 * Duplicate OPPs (both freq and volt are same) and opp->available
1045 * -EEXIST Freq are same and volt are different OR
1046 * Duplicate OPPs (both freq and volt are same) and !opp->available
1047 * -ENOMEM Memory allocation failure
1049 int _opp_add_v1(struct opp_table
*opp_table
, struct device
*dev
,
1050 unsigned long freq
, long u_volt
, bool dynamic
)
1052 struct dev_pm_opp
*new_opp
;
1056 new_opp
= _opp_allocate(opp_table
);
1060 /* populate the opp table */
1061 new_opp
->rate
= freq
;
1062 tol
= u_volt
* opp_table
->voltage_tolerance_v1
/ 100;
1063 new_opp
->supplies
[0].u_volt
= u_volt
;
1064 new_opp
->supplies
[0].u_volt_min
= u_volt
- tol
;
1065 new_opp
->supplies
[0].u_volt_max
= u_volt
+ tol
;
1066 new_opp
->available
= true;
1067 new_opp
->dynamic
= dynamic
;
1069 ret
= _opp_add(dev
, new_opp
, opp_table
);
1071 /* Don't return error for duplicate OPPs */
1078 * Notify the changes in the availability of the operable
1079 * frequency/voltage list.
1081 blocking_notifier_call_chain(&opp_table
->head
, OPP_EVENT_ADD
, new_opp
);
1091 * dev_pm_opp_set_supported_hw() - Set supported platforms
1092 * @dev: Device for which supported-hw has to be set.
1093 * @versions: Array of hierarchy of versions to match.
1094 * @count: Number of elements in the array.
1096 * This is required only for the V2 bindings, and it enables a platform to
1097 * specify the hierarchy of versions it supports. OPP layer will then enable
1098 * OPPs, which are available for those versions, based on its 'opp-supported-hw'
1101 struct opp_table
*dev_pm_opp_set_supported_hw(struct device
*dev
,
1102 const u32
*versions
, unsigned int count
)
1104 struct opp_table
*opp_table
;
1107 opp_table
= dev_pm_opp_get_opp_table(dev
);
1109 return ERR_PTR(-ENOMEM
);
1111 /* Make sure there are no concurrent readers while updating opp_table */
1112 WARN_ON(!list_empty(&opp_table
->opp_list
));
1114 /* Do we already have a version hierarchy associated with opp_table? */
1115 if (opp_table
->supported_hw
) {
1116 dev_err(dev
, "%s: Already have supported hardware list\n",
1122 opp_table
->supported_hw
= kmemdup(versions
, count
* sizeof(*versions
),
1124 if (!opp_table
->supported_hw
) {
1129 opp_table
->supported_hw_count
= count
;
1134 dev_pm_opp_put_opp_table(opp_table
);
1136 return ERR_PTR(ret
);
1138 EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw
);
1141 * dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw
1142 * @opp_table: OPP table returned by dev_pm_opp_set_supported_hw().
1144 * This is required only for the V2 bindings, and is called for a matching
1145 * dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure
1146 * will not be freed.
1148 void dev_pm_opp_put_supported_hw(struct opp_table
*opp_table
)
1150 /* Make sure there are no concurrent readers while updating opp_table */
1151 WARN_ON(!list_empty(&opp_table
->opp_list
));
1153 if (!opp_table
->supported_hw
) {
1154 pr_err("%s: Doesn't have supported hardware list\n",
1159 kfree(opp_table
->supported_hw
);
1160 opp_table
->supported_hw
= NULL
;
1161 opp_table
->supported_hw_count
= 0;
1163 dev_pm_opp_put_opp_table(opp_table
);
1165 EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw
);
1168 * dev_pm_opp_set_prop_name() - Set prop-extn name
1169 * @dev: Device for which the prop-name has to be set.
1170 * @name: name to postfix to properties.
1172 * This is required only for the V2 bindings, and it enables a platform to
1173 * specify the extn to be used for certain property names. The properties to
1174 * which the extension will apply are opp-microvolt and opp-microamp. OPP core
1175 * should postfix the property name with -<name> while looking for them.
1177 struct opp_table
*dev_pm_opp_set_prop_name(struct device
*dev
, const char *name
)
1179 struct opp_table
*opp_table
;
1182 opp_table
= dev_pm_opp_get_opp_table(dev
);
1184 return ERR_PTR(-ENOMEM
);
1186 /* Make sure there are no concurrent readers while updating opp_table */
1187 WARN_ON(!list_empty(&opp_table
->opp_list
));
1189 /* Do we already have a prop-name associated with opp_table? */
1190 if (opp_table
->prop_name
) {
1191 dev_err(dev
, "%s: Already have prop-name %s\n", __func__
,
1192 opp_table
->prop_name
);
1197 opp_table
->prop_name
= kstrdup(name
, GFP_KERNEL
);
1198 if (!opp_table
->prop_name
) {
1206 dev_pm_opp_put_opp_table(opp_table
);
1208 return ERR_PTR(ret
);
1210 EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name
);
1213 * dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name
1214 * @opp_table: OPP table returned by dev_pm_opp_set_prop_name().
1216 * This is required only for the V2 bindings, and is called for a matching
1217 * dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure
1218 * will not be freed.
1220 void dev_pm_opp_put_prop_name(struct opp_table
*opp_table
)
1222 /* Make sure there are no concurrent readers while updating opp_table */
1223 WARN_ON(!list_empty(&opp_table
->opp_list
));
1225 if (!opp_table
->prop_name
) {
1226 pr_err("%s: Doesn't have a prop-name\n", __func__
);
1230 kfree(opp_table
->prop_name
);
1231 opp_table
->prop_name
= NULL
;
1233 dev_pm_opp_put_opp_table(opp_table
);
1235 EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name
);
1237 static int _allocate_set_opp_data(struct opp_table
*opp_table
)
1239 struct dev_pm_set_opp_data
*data
;
1240 int len
, count
= opp_table
->regulator_count
;
1242 if (WARN_ON(!count
))
1245 /* space for set_opp_data */
1246 len
= sizeof(*data
);
1248 /* space for old_opp.supplies and new_opp.supplies */
1249 len
+= 2 * sizeof(struct dev_pm_opp_supply
) * count
;
1251 data
= kzalloc(len
, GFP_KERNEL
);
1255 data
->old_opp
.supplies
= (void *)(data
+ 1);
1256 data
->new_opp
.supplies
= data
->old_opp
.supplies
+ count
;
1258 opp_table
->set_opp_data
= data
;
1263 static void _free_set_opp_data(struct opp_table
*opp_table
)
1265 kfree(opp_table
->set_opp_data
);
1266 opp_table
->set_opp_data
= NULL
;
1270 * dev_pm_opp_set_regulators() - Set regulator names for the device
1271 * @dev: Device for which regulator name is being set.
1272 * @names: Array of pointers to the names of the regulator.
1273 * @count: Number of regulators.
1275 * In order to support OPP switching, OPP layer needs to know the name of the
1276 * device's regulators, as the core would be required to switch voltages as
1279 * This must be called before any OPPs are initialized for the device.
1281 struct opp_table
*dev_pm_opp_set_regulators(struct device
*dev
,
1282 const char * const names
[],
1285 struct opp_table
*opp_table
;
1286 struct regulator
*reg
;
1289 opp_table
= dev_pm_opp_get_opp_table(dev
);
1291 return ERR_PTR(-ENOMEM
);
1293 /* This should be called before OPPs are initialized */
1294 if (WARN_ON(!list_empty(&opp_table
->opp_list
))) {
1299 /* Already have regulators set */
1300 if (opp_table
->regulators
) {
1305 opp_table
->regulators
= kmalloc_array(count
,
1306 sizeof(*opp_table
->regulators
),
1308 if (!opp_table
->regulators
) {
1313 for (i
= 0; i
< count
; i
++) {
1314 reg
= regulator_get_optional(dev
, names
[i
]);
1317 if (ret
!= -EPROBE_DEFER
)
1318 dev_err(dev
, "%s: no regulator (%s) found: %d\n",
1319 __func__
, names
[i
], ret
);
1320 goto free_regulators
;
1323 opp_table
->regulators
[i
] = reg
;
1326 opp_table
->regulator_count
= count
;
1328 /* Allocate block only once to pass to set_opp() routines */
1329 ret
= _allocate_set_opp_data(opp_table
);
1331 goto free_regulators
;
1337 regulator_put(opp_table
->regulators
[--i
]);
1339 kfree(opp_table
->regulators
);
1340 opp_table
->regulators
= NULL
;
1341 opp_table
->regulator_count
= 0;
1343 dev_pm_opp_put_opp_table(opp_table
);
1345 return ERR_PTR(ret
);
1347 EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators
);
1350 * dev_pm_opp_put_regulators() - Releases resources blocked for regulator
1351 * @opp_table: OPP table returned from dev_pm_opp_set_regulators().
1353 void dev_pm_opp_put_regulators(struct opp_table
*opp_table
)
1357 if (!opp_table
->regulators
) {
1358 pr_err("%s: Doesn't have regulators set\n", __func__
);
1362 /* Make sure there are no concurrent readers while updating opp_table */
1363 WARN_ON(!list_empty(&opp_table
->opp_list
));
1365 for (i
= opp_table
->regulator_count
- 1; i
>= 0; i
--)
1366 regulator_put(opp_table
->regulators
[i
]);
1368 _free_set_opp_data(opp_table
);
1370 kfree(opp_table
->regulators
);
1371 opp_table
->regulators
= NULL
;
1372 opp_table
->regulator_count
= 0;
1374 dev_pm_opp_put_opp_table(opp_table
);
1376 EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators
);
1379 * dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper
1380 * @dev: Device for which the helper is getting registered.
1381 * @set_opp: Custom set OPP helper.
1383 * This is useful to support complex platforms (like platforms with multiple
1384 * regulators per device), instead of the generic OPP set rate helper.
1386 * This must be called before any OPPs are initialized for the device.
1388 struct opp_table
*dev_pm_opp_register_set_opp_helper(struct device
*dev
,
1389 int (*set_opp
)(struct dev_pm_set_opp_data
*data
))
1391 struct opp_table
*opp_table
;
1395 return ERR_PTR(-EINVAL
);
1397 opp_table
= dev_pm_opp_get_opp_table(dev
);
1399 return ERR_PTR(-ENOMEM
);
1401 /* This should be called before OPPs are initialized */
1402 if (WARN_ON(!list_empty(&opp_table
->opp_list
))) {
1407 /* Already have custom set_opp helper */
1408 if (WARN_ON(opp_table
->set_opp
)) {
1413 opp_table
->set_opp
= set_opp
;
1418 dev_pm_opp_put_opp_table(opp_table
);
1420 return ERR_PTR(ret
);
1422 EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper
);
1425 * dev_pm_opp_register_put_opp_helper() - Releases resources blocked for
1427 * @opp_table: OPP table returned from dev_pm_opp_register_set_opp_helper().
1429 * Release resources blocked for platform specific set_opp helper.
1431 void dev_pm_opp_register_put_opp_helper(struct opp_table
*opp_table
)
1433 if (!opp_table
->set_opp
) {
1434 pr_err("%s: Doesn't have custom set_opp helper set\n",
1439 /* Make sure there are no concurrent readers while updating opp_table */
1440 WARN_ON(!list_empty(&opp_table
->opp_list
));
1442 opp_table
->set_opp
= NULL
;
1444 dev_pm_opp_put_opp_table(opp_table
);
1446 EXPORT_SYMBOL_GPL(dev_pm_opp_register_put_opp_helper
);
1449 * dev_pm_opp_add() - Add an OPP table from a table definitions
1450 * @dev: device for which we do this operation
1451 * @freq: Frequency in Hz for this OPP
1452 * @u_volt: Voltage in uVolts for this OPP
1454 * This function adds an opp definition to the opp table and returns status.
1455 * The opp is made available by default and it can be controlled using
1456 * dev_pm_opp_enable/disable functions.
1460 * Duplicate OPPs (both freq and volt are same) and opp->available
1461 * -EEXIST Freq are same and volt are different OR
1462 * Duplicate OPPs (both freq and volt are same) and !opp->available
1463 * -ENOMEM Memory allocation failure
1465 int dev_pm_opp_add(struct device
*dev
, unsigned long freq
, unsigned long u_volt
)
1467 struct opp_table
*opp_table
;
1470 opp_table
= dev_pm_opp_get_opp_table(dev
);
1474 ret
= _opp_add_v1(opp_table
, dev
, freq
, u_volt
, true);
1476 dev_pm_opp_put_opp_table(opp_table
);
1479 EXPORT_SYMBOL_GPL(dev_pm_opp_add
);
1482 * _opp_set_availability() - helper to set the availability of an opp
1483 * @dev: device for which we do this operation
1484 * @freq: OPP frequency to modify availability
1485 * @availability_req: availability status requested for this opp
1487 * Set the availability of an OPP, opp_{enable,disable} share a common logic
1488 * which is isolated here.
1490 * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
1491 * copy operation, returns 0 if no modification was done OR modification was
1494 static int _opp_set_availability(struct device
*dev
, unsigned long freq
,
1495 bool availability_req
)
1497 struct opp_table
*opp_table
;
1498 struct dev_pm_opp
*tmp_opp
, *opp
= ERR_PTR(-ENODEV
);
1501 /* Find the opp_table */
1502 opp_table
= _find_opp_table(dev
);
1503 if (IS_ERR(opp_table
)) {
1504 r
= PTR_ERR(opp_table
);
1505 dev_warn(dev
, "%s: Device OPP not found (%d)\n", __func__
, r
);
1509 mutex_lock(&opp_table
->lock
);
1511 /* Do we have the frequency? */
1512 list_for_each_entry(tmp_opp
, &opp_table
->opp_list
, node
) {
1513 if (tmp_opp
->rate
== freq
) {
1524 /* Is update really needed? */
1525 if (opp
->available
== availability_req
)
1528 opp
->available
= availability_req
;
1530 /* Notify the change of the OPP availability */
1531 if (availability_req
)
1532 blocking_notifier_call_chain(&opp_table
->head
, OPP_EVENT_ENABLE
,
1535 blocking_notifier_call_chain(&opp_table
->head
,
1536 OPP_EVENT_DISABLE
, opp
);
1539 mutex_unlock(&opp_table
->lock
);
1540 dev_pm_opp_put_opp_table(opp_table
);
1545 * dev_pm_opp_enable() - Enable a specific OPP
1546 * @dev: device for which we do this operation
1547 * @freq: OPP frequency to enable
1549 * Enables a provided opp. If the operation is valid, this returns 0, else the
1550 * corresponding error value. It is meant to be used for users an OPP available
1551 * after being temporarily made unavailable with dev_pm_opp_disable.
1553 * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
1554 * copy operation, returns 0 if no modification was done OR modification was
1557 int dev_pm_opp_enable(struct device
*dev
, unsigned long freq
)
1559 return _opp_set_availability(dev
, freq
, true);
1561 EXPORT_SYMBOL_GPL(dev_pm_opp_enable
);
1564 * dev_pm_opp_disable() - Disable a specific OPP
1565 * @dev: device for which we do this operation
1566 * @freq: OPP frequency to disable
1568 * Disables a provided opp. If the operation is valid, this returns
1569 * 0, else the corresponding error value. It is meant to be a temporary
1570 * control by users to make this OPP not available until the circumstances are
1571 * right to make it available again (with a call to dev_pm_opp_enable).
1573 * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
1574 * copy operation, returns 0 if no modification was done OR modification was
1577 int dev_pm_opp_disable(struct device
*dev
, unsigned long freq
)
1579 return _opp_set_availability(dev
, freq
, false);
1581 EXPORT_SYMBOL_GPL(dev_pm_opp_disable
);
1584 * dev_pm_opp_register_notifier() - Register OPP notifier for the device
1585 * @dev: Device for which notifier needs to be registered
1586 * @nb: Notifier block to be registered
1588 * Return: 0 on success or a negative error value.
1590 int dev_pm_opp_register_notifier(struct device
*dev
, struct notifier_block
*nb
)
1592 struct opp_table
*opp_table
;
1595 opp_table
= _find_opp_table(dev
);
1596 if (IS_ERR(opp_table
))
1597 return PTR_ERR(opp_table
);
1599 ret
= blocking_notifier_chain_register(&opp_table
->head
, nb
);
1601 dev_pm_opp_put_opp_table(opp_table
);
1605 EXPORT_SYMBOL(dev_pm_opp_register_notifier
);
1608 * dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device
1609 * @dev: Device for which notifier needs to be unregistered
1610 * @nb: Notifier block to be unregistered
1612 * Return: 0 on success or a negative error value.
1614 int dev_pm_opp_unregister_notifier(struct device
*dev
,
1615 struct notifier_block
*nb
)
1617 struct opp_table
*opp_table
;
1620 opp_table
= _find_opp_table(dev
);
1621 if (IS_ERR(opp_table
))
1622 return PTR_ERR(opp_table
);
1624 ret
= blocking_notifier_chain_unregister(&opp_table
->head
, nb
);
1626 dev_pm_opp_put_opp_table(opp_table
);
1630 EXPORT_SYMBOL(dev_pm_opp_unregister_notifier
);
1633 * Free OPPs either created using static entries present in DT or even the
1634 * dynamically added entries based on remove_all param.
1636 void _dev_pm_opp_remove_table(struct opp_table
*opp_table
, struct device
*dev
,
1639 struct dev_pm_opp
*opp
, *tmp
;
1641 /* Find if opp_table manages a single device */
1642 if (list_is_singular(&opp_table
->dev_list
)) {
1643 /* Free static OPPs */
1644 list_for_each_entry_safe(opp
, tmp
, &opp_table
->opp_list
, node
) {
1645 if (remove_all
|| !opp
->dynamic
)
1646 dev_pm_opp_put(opp
);
1649 _remove_opp_dev(_find_opp_dev(dev
, opp_table
), opp_table
);
1653 void _dev_pm_opp_find_and_remove_table(struct device
*dev
, bool remove_all
)
1655 struct opp_table
*opp_table
;
1657 /* Check for existing table for 'dev' */
1658 opp_table
= _find_opp_table(dev
);
1659 if (IS_ERR(opp_table
)) {
1660 int error
= PTR_ERR(opp_table
);
1662 if (error
!= -ENODEV
)
1663 WARN(1, "%s: opp_table: %d\n",
1664 IS_ERR_OR_NULL(dev
) ?
1665 "Invalid device" : dev_name(dev
),
1670 _dev_pm_opp_remove_table(opp_table
, dev
, remove_all
);
1672 dev_pm_opp_put_opp_table(opp_table
);
1676 * dev_pm_opp_remove_table() - Free all OPPs associated with the device
1677 * @dev: device pointer used to lookup OPP table.
1679 * Free both OPPs created using static entries present in DT and the
1680 * dynamically added entries.
1682 void dev_pm_opp_remove_table(struct device
*dev
)
1684 _dev_pm_opp_find_and_remove_table(dev
, true);
1686 EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table
);