This source file includes following definitions.
- _find_opp_dev
- _find_opp_table_unlocked
- _find_opp_table
- dev_pm_opp_get_voltage
- dev_pm_opp_get_freq
- dev_pm_opp_get_level
- dev_pm_opp_is_turbo
- dev_pm_opp_get_max_clock_latency
- dev_pm_opp_get_max_volt_latency
- dev_pm_opp_get_max_transition_latency
- dev_pm_opp_get_suspend_opp_freq
- _get_opp_count
- dev_pm_opp_get_opp_count
- dev_pm_opp_find_freq_exact
- dev_pm_opp_find_level_exact
- _find_freq_ceil
- dev_pm_opp_find_freq_ceil
- dev_pm_opp_find_freq_floor
- dev_pm_opp_find_freq_ceil_by_volt
- _set_opp_voltage
- _generic_set_opp_clk_only
- _generic_set_opp_regulator
- _set_opp_custom
- _set_required_opps
- dev_pm_opp_set_rate
- _remove_opp_dev
- _add_opp_dev_unlocked
- _add_opp_dev
- _allocate_opp_table
- _get_opp_table_kref
- _opp_get_opp_table
- dev_pm_opp_get_opp_table
- dev_pm_opp_get_opp_table_indexed
- _opp_table_kref_release
- _opp_remove_all_static
- _opp_table_list_kref_release
- _put_opp_list_kref
- dev_pm_opp_put_opp_table
- _opp_free
- _opp_kref_release
- _opp_kref_release_unlocked
- _opp_kref_release_locked
- dev_pm_opp_get
- dev_pm_opp_put
- dev_pm_opp_put_unlocked
- dev_pm_opp_remove
- dev_pm_opp_remove_all_dynamic
- _opp_allocate
- _opp_supported_by_regulators
- _opp_is_duplicate
- _opp_add
- _opp_add_v1
- dev_pm_opp_set_supported_hw
- dev_pm_opp_put_supported_hw
- dev_pm_opp_set_prop_name
- dev_pm_opp_put_prop_name
- _allocate_set_opp_data
- _free_set_opp_data
- dev_pm_opp_set_regulators
- dev_pm_opp_put_regulators
- dev_pm_opp_set_clkname
- dev_pm_opp_put_clkname
- dev_pm_opp_register_set_opp_helper
- dev_pm_opp_unregister_set_opp_helper
- _opp_detach_genpd
- dev_pm_opp_attach_genpd
- dev_pm_opp_detach_genpd
- dev_pm_opp_xlate_performance_state
- dev_pm_opp_add
- _opp_set_availability
- dev_pm_opp_enable
- dev_pm_opp_disable
- dev_pm_opp_register_notifier
- dev_pm_opp_unregister_notifier
- _dev_pm_opp_find_and_remove_table
- dev_pm_opp_remove_table
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10
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13 #include <linux/clk.h>
14 #include <linux/errno.h>
15 #include <linux/err.h>
16 #include <linux/slab.h>
17 #include <linux/device.h>
18 #include <linux/export.h>
19 #include <linux/pm_domain.h>
20 #include <linux/regulator/consumer.h>
21
22 #include "opp.h"
23
24
25
26
27
28
29 LIST_HEAD(opp_tables);
30
31 DEFINE_MUTEX(opp_table_lock);
32
33 static struct opp_device *_find_opp_dev(const struct device *dev,
34 struct opp_table *opp_table)
35 {
36 struct opp_device *opp_dev;
37
38 list_for_each_entry(opp_dev, &opp_table->dev_list, node)
39 if (opp_dev->dev == dev)
40 return opp_dev;
41
42 return NULL;
43 }
44
45 static struct opp_table *_find_opp_table_unlocked(struct device *dev)
46 {
47 struct opp_table *opp_table;
48 bool found;
49
50 list_for_each_entry(opp_table, &opp_tables, node) {
51 mutex_lock(&opp_table->lock);
52 found = !!_find_opp_dev(dev, opp_table);
53 mutex_unlock(&opp_table->lock);
54
55 if (found) {
56 _get_opp_table_kref(opp_table);
57
58 return opp_table;
59 }
60 }
61
62 return ERR_PTR(-ENODEV);
63 }
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74
75
76 struct opp_table *_find_opp_table(struct device *dev)
77 {
78 struct opp_table *opp_table;
79
80 if (IS_ERR_OR_NULL(dev)) {
81 pr_err("%s: Invalid parameters\n", __func__);
82 return ERR_PTR(-EINVAL);
83 }
84
85 mutex_lock(&opp_table_lock);
86 opp_table = _find_opp_table_unlocked(dev);
87 mutex_unlock(&opp_table_lock);
88
89 return opp_table;
90 }
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99
100
101 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
102 {
103 if (IS_ERR_OR_NULL(opp)) {
104 pr_err("%s: Invalid parameters\n", __func__);
105 return 0;
106 }
107
108 return opp->supplies[0].u_volt;
109 }
110 EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
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117
118
119 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
120 {
121 if (IS_ERR_OR_NULL(opp) || !opp->available) {
122 pr_err("%s: Invalid parameters\n", __func__);
123 return 0;
124 }
125
126 return opp->rate;
127 }
128 EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
129
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135
136
137 unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
138 {
139 if (IS_ERR_OR_NULL(opp) || !opp->available) {
140 pr_err("%s: Invalid parameters\n", __func__);
141 return 0;
142 }
143
144 return opp->level;
145 }
146 EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);
147
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157
158 bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
159 {
160 if (IS_ERR_OR_NULL(opp) || !opp->available) {
161 pr_err("%s: Invalid parameters\n", __func__);
162 return false;
163 }
164
165 return opp->turbo;
166 }
167 EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo);
168
169
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172
173
174
175 unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
176 {
177 struct opp_table *opp_table;
178 unsigned long clock_latency_ns;
179
180 opp_table = _find_opp_table(dev);
181 if (IS_ERR(opp_table))
182 return 0;
183
184 clock_latency_ns = opp_table->clock_latency_ns_max;
185
186 dev_pm_opp_put_opp_table(opp_table);
187
188 return clock_latency_ns;
189 }
190 EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency);
191
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195
196
197
198 unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
199 {
200 struct opp_table *opp_table;
201 struct dev_pm_opp *opp;
202 struct regulator *reg;
203 unsigned long latency_ns = 0;
204 int ret, i, count;
205 struct {
206 unsigned long min;
207 unsigned long max;
208 } *uV;
209
210 opp_table = _find_opp_table(dev);
211 if (IS_ERR(opp_table))
212 return 0;
213
214
215 if (!opp_table->regulators)
216 goto put_opp_table;
217
218 count = opp_table->regulator_count;
219
220 uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL);
221 if (!uV)
222 goto put_opp_table;
223
224 mutex_lock(&opp_table->lock);
225
226 for (i = 0; i < count; i++) {
227 uV[i].min = ~0;
228 uV[i].max = 0;
229
230 list_for_each_entry(opp, &opp_table->opp_list, node) {
231 if (!opp->available)
232 continue;
233
234 if (opp->supplies[i].u_volt_min < uV[i].min)
235 uV[i].min = opp->supplies[i].u_volt_min;
236 if (opp->supplies[i].u_volt_max > uV[i].max)
237 uV[i].max = opp->supplies[i].u_volt_max;
238 }
239 }
240
241 mutex_unlock(&opp_table->lock);
242
243
244
245
246
247 for (i = 0; i < count; i++) {
248 reg = opp_table->regulators[i];
249 ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max);
250 if (ret > 0)
251 latency_ns += ret * 1000;
252 }
253
254 kfree(uV);
255 put_opp_table:
256 dev_pm_opp_put_opp_table(opp_table);
257
258 return latency_ns;
259 }
260 EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency);
261
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269
270 unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
271 {
272 return dev_pm_opp_get_max_volt_latency(dev) +
273 dev_pm_opp_get_max_clock_latency(dev);
274 }
275 EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
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283
284 unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
285 {
286 struct opp_table *opp_table;
287 unsigned long freq = 0;
288
289 opp_table = _find_opp_table(dev);
290 if (IS_ERR(opp_table))
291 return 0;
292
293 if (opp_table->suspend_opp && opp_table->suspend_opp->available)
294 freq = dev_pm_opp_get_freq(opp_table->suspend_opp);
295
296 dev_pm_opp_put_opp_table(opp_table);
297
298 return freq;
299 }
300 EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq);
301
302 int _get_opp_count(struct opp_table *opp_table)
303 {
304 struct dev_pm_opp *opp;
305 int count = 0;
306
307 mutex_lock(&opp_table->lock);
308
309 list_for_each_entry(opp, &opp_table->opp_list, node) {
310 if (opp->available)
311 count++;
312 }
313
314 mutex_unlock(&opp_table->lock);
315
316 return count;
317 }
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325
326 int dev_pm_opp_get_opp_count(struct device *dev)
327 {
328 struct opp_table *opp_table;
329 int count;
330
331 opp_table = _find_opp_table(dev);
332 if (IS_ERR(opp_table)) {
333 count = PTR_ERR(opp_table);
334 dev_dbg(dev, "%s: OPP table not found (%d)\n",
335 __func__, count);
336 return count;
337 }
338
339 count = _get_opp_count(opp_table);
340 dev_pm_opp_put_opp_table(opp_table);
341
342 return count;
343 }
344 EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
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369 struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
370 unsigned long freq,
371 bool available)
372 {
373 struct opp_table *opp_table;
374 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
375
376 opp_table = _find_opp_table(dev);
377 if (IS_ERR(opp_table)) {
378 int r = PTR_ERR(opp_table);
379
380 dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
381 return ERR_PTR(r);
382 }
383
384 mutex_lock(&opp_table->lock);
385
386 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
387 if (temp_opp->available == available &&
388 temp_opp->rate == freq) {
389 opp = temp_opp;
390
391
392 dev_pm_opp_get(opp);
393 break;
394 }
395 }
396
397 mutex_unlock(&opp_table->lock);
398 dev_pm_opp_put_opp_table(opp_table);
399
400 return opp;
401 }
402 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
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419 struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
420 unsigned int level)
421 {
422 struct opp_table *opp_table;
423 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
424
425 opp_table = _find_opp_table(dev);
426 if (IS_ERR(opp_table)) {
427 int r = PTR_ERR(opp_table);
428
429 dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
430 return ERR_PTR(r);
431 }
432
433 mutex_lock(&opp_table->lock);
434
435 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
436 if (temp_opp->level == level) {
437 opp = temp_opp;
438
439
440 dev_pm_opp_get(opp);
441 break;
442 }
443 }
444
445 mutex_unlock(&opp_table->lock);
446 dev_pm_opp_put_opp_table(opp_table);
447
448 return opp;
449 }
450 EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact);
451
452 static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table,
453 unsigned long *freq)
454 {
455 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
456
457 mutex_lock(&opp_table->lock);
458
459 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
460 if (temp_opp->available && temp_opp->rate >= *freq) {
461 opp = temp_opp;
462 *freq = opp->rate;
463
464
465 dev_pm_opp_get(opp);
466 break;
467 }
468 }
469
470 mutex_unlock(&opp_table->lock);
471
472 return opp;
473 }
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493 struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
494 unsigned long *freq)
495 {
496 struct opp_table *opp_table;
497 struct dev_pm_opp *opp;
498
499 if (!dev || !freq) {
500 dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
501 return ERR_PTR(-EINVAL);
502 }
503
504 opp_table = _find_opp_table(dev);
505 if (IS_ERR(opp_table))
506 return ERR_CAST(opp_table);
507
508 opp = _find_freq_ceil(opp_table, freq);
509
510 dev_pm_opp_put_opp_table(opp_table);
511
512 return opp;
513 }
514 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
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534 struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
535 unsigned long *freq)
536 {
537 struct opp_table *opp_table;
538 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
539
540 if (!dev || !freq) {
541 dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
542 return ERR_PTR(-EINVAL);
543 }
544
545 opp_table = _find_opp_table(dev);
546 if (IS_ERR(opp_table))
547 return ERR_CAST(opp_table);
548
549 mutex_lock(&opp_table->lock);
550
551 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
552 if (temp_opp->available) {
553
554 if (temp_opp->rate > *freq)
555 break;
556 else
557 opp = temp_opp;
558 }
559 }
560
561
562 if (!IS_ERR(opp))
563 dev_pm_opp_get(opp);
564 mutex_unlock(&opp_table->lock);
565 dev_pm_opp_put_opp_table(opp_table);
566
567 if (!IS_ERR(opp))
568 *freq = opp->rate;
569
570 return opp;
571 }
572 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
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591 struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
592 unsigned long u_volt)
593 {
594 struct opp_table *opp_table;
595 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
596
597 if (!dev || !u_volt) {
598 dev_err(dev, "%s: Invalid argument volt=%lu\n", __func__,
599 u_volt);
600 return ERR_PTR(-EINVAL);
601 }
602
603 opp_table = _find_opp_table(dev);
604 if (IS_ERR(opp_table))
605 return ERR_CAST(opp_table);
606
607 mutex_lock(&opp_table->lock);
608
609 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
610 if (temp_opp->available) {
611 if (temp_opp->supplies[0].u_volt > u_volt)
612 break;
613 opp = temp_opp;
614 }
615 }
616
617
618 if (!IS_ERR(opp))
619 dev_pm_opp_get(opp);
620
621 mutex_unlock(&opp_table->lock);
622 dev_pm_opp_put_opp_table(opp_table);
623
624 return opp;
625 }
626 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_by_volt);
627
628 static int _set_opp_voltage(struct device *dev, struct regulator *reg,
629 struct dev_pm_opp_supply *supply)
630 {
631 int ret;
632
633
634 if (IS_ERR(reg)) {
635 dev_dbg(dev, "%s: regulator not available: %ld\n", __func__,
636 PTR_ERR(reg));
637 return 0;
638 }
639
640 dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__,
641 supply->u_volt_min, supply->u_volt, supply->u_volt_max);
642
643 ret = regulator_set_voltage_triplet(reg, supply->u_volt_min,
644 supply->u_volt, supply->u_volt_max);
645 if (ret)
646 dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n",
647 __func__, supply->u_volt_min, supply->u_volt,
648 supply->u_volt_max, ret);
649
650 return ret;
651 }
652
653 static inline int _generic_set_opp_clk_only(struct device *dev, struct clk *clk,
654 unsigned long freq)
655 {
656 int ret;
657
658 ret = clk_set_rate(clk, freq);
659 if (ret) {
660 dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
661 ret);
662 }
663
664 return ret;
665 }
666
667 static int _generic_set_opp_regulator(const struct opp_table *opp_table,
668 struct device *dev,
669 unsigned long old_freq,
670 unsigned long freq,
671 struct dev_pm_opp_supply *old_supply,
672 struct dev_pm_opp_supply *new_supply)
673 {
674 struct regulator *reg = opp_table->regulators[0];
675 int ret;
676
677
678 if (WARN_ON(opp_table->regulator_count > 1)) {
679 dev_err(dev, "multiple regulators are not supported\n");
680 return -EINVAL;
681 }
682
683
684 if (freq >= old_freq) {
685 ret = _set_opp_voltage(dev, reg, new_supply);
686 if (ret)
687 goto restore_voltage;
688 }
689
690
691 ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq);
692 if (ret)
693 goto restore_voltage;
694
695
696 if (freq < old_freq) {
697 ret = _set_opp_voltage(dev, reg, new_supply);
698 if (ret)
699 goto restore_freq;
700 }
701
702 return 0;
703
704 restore_freq:
705 if (_generic_set_opp_clk_only(dev, opp_table->clk, old_freq))
706 dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
707 __func__, old_freq);
708 restore_voltage:
709
710 if (old_supply)
711 _set_opp_voltage(dev, reg, old_supply);
712
713 return ret;
714 }
715
716 static int _set_opp_custom(const struct opp_table *opp_table,
717 struct device *dev, unsigned long old_freq,
718 unsigned long freq,
719 struct dev_pm_opp_supply *old_supply,
720 struct dev_pm_opp_supply *new_supply)
721 {
722 struct dev_pm_set_opp_data *data;
723 int size;
724
725 data = opp_table->set_opp_data;
726 data->regulators = opp_table->regulators;
727 data->regulator_count = opp_table->regulator_count;
728 data->clk = opp_table->clk;
729 data->dev = dev;
730
731 data->old_opp.rate = old_freq;
732 size = sizeof(*old_supply) * opp_table->regulator_count;
733 if (!old_supply)
734 memset(data->old_opp.supplies, 0, size);
735 else
736 memcpy(data->old_opp.supplies, old_supply, size);
737
738 data->new_opp.rate = freq;
739 memcpy(data->new_opp.supplies, new_supply, size);
740
741 return opp_table->set_opp(data);
742 }
743
744
745 static int _set_required_opps(struct device *dev,
746 struct opp_table *opp_table,
747 struct dev_pm_opp *opp)
748 {
749 struct opp_table **required_opp_tables = opp_table->required_opp_tables;
750 struct device **genpd_virt_devs = opp_table->genpd_virt_devs;
751 unsigned int pstate;
752 int i, ret = 0;
753
754 if (!required_opp_tables)
755 return 0;
756
757
758 if (!genpd_virt_devs) {
759 pstate = likely(opp) ? opp->required_opps[0]->pstate : 0;
760 ret = dev_pm_genpd_set_performance_state(dev, pstate);
761 if (ret) {
762 dev_err(dev, "Failed to set performance state of %s: %d (%d)\n",
763 dev_name(dev), pstate, ret);
764 }
765 return ret;
766 }
767
768
769
770
771
772
773
774 mutex_lock(&opp_table->genpd_virt_dev_lock);
775
776 for (i = 0; i < opp_table->required_opp_count; i++) {
777 pstate = likely(opp) ? opp->required_opps[i]->pstate : 0;
778
779 if (!genpd_virt_devs[i])
780 continue;
781
782 ret = dev_pm_genpd_set_performance_state(genpd_virt_devs[i], pstate);
783 if (ret) {
784 dev_err(dev, "Failed to set performance rate of %s: %d (%d)\n",
785 dev_name(genpd_virt_devs[i]), pstate, ret);
786 break;
787 }
788 }
789 mutex_unlock(&opp_table->genpd_virt_dev_lock);
790
791 return ret;
792 }
793
794
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804
805 int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
806 {
807 struct opp_table *opp_table;
808 unsigned long freq, old_freq, temp_freq;
809 struct dev_pm_opp *old_opp, *opp;
810 struct clk *clk;
811 int ret;
812
813 opp_table = _find_opp_table(dev);
814 if (IS_ERR(opp_table)) {
815 dev_err(dev, "%s: device opp doesn't exist\n", __func__);
816 return PTR_ERR(opp_table);
817 }
818
819 if (unlikely(!target_freq)) {
820 if (opp_table->required_opp_tables) {
821 ret = _set_required_opps(dev, opp_table, NULL);
822 } else {
823 dev_err(dev, "target frequency can't be 0\n");
824 ret = -EINVAL;
825 }
826
827 goto put_opp_table;
828 }
829
830 clk = opp_table->clk;
831 if (IS_ERR(clk)) {
832 dev_err(dev, "%s: No clock available for the device\n",
833 __func__);
834 ret = PTR_ERR(clk);
835 goto put_opp_table;
836 }
837
838 freq = clk_round_rate(clk, target_freq);
839 if ((long)freq <= 0)
840 freq = target_freq;
841
842 old_freq = clk_get_rate(clk);
843
844
845 if (old_freq == freq) {
846 dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
847 __func__, freq);
848 ret = 0;
849 goto put_opp_table;
850 }
851
852 temp_freq = old_freq;
853 old_opp = _find_freq_ceil(opp_table, &temp_freq);
854 if (IS_ERR(old_opp)) {
855 dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n",
856 __func__, old_freq, PTR_ERR(old_opp));
857 }
858
859 temp_freq = freq;
860 opp = _find_freq_ceil(opp_table, &temp_freq);
861 if (IS_ERR(opp)) {
862 ret = PTR_ERR(opp);
863 dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",
864 __func__, freq, ret);
865 goto put_old_opp;
866 }
867
868 dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__,
869 old_freq, freq);
870
871
872 if (freq >= old_freq) {
873 ret = _set_required_opps(dev, opp_table, opp);
874 if (ret)
875 goto put_opp;
876 }
877
878 if (opp_table->set_opp) {
879 ret = _set_opp_custom(opp_table, dev, old_freq, freq,
880 IS_ERR(old_opp) ? NULL : old_opp->supplies,
881 opp->supplies);
882 } else if (opp_table->regulators) {
883 ret = _generic_set_opp_regulator(opp_table, dev, old_freq, freq,
884 IS_ERR(old_opp) ? NULL : old_opp->supplies,
885 opp->supplies);
886 } else {
887
888 ret = _generic_set_opp_clk_only(dev, clk, freq);
889 }
890
891
892 if (!ret && freq < old_freq) {
893 ret = _set_required_opps(dev, opp_table, opp);
894 if (ret)
895 dev_err(dev, "Failed to set required opps: %d\n", ret);
896 }
897
898 put_opp:
899 dev_pm_opp_put(opp);
900 put_old_opp:
901 if (!IS_ERR(old_opp))
902 dev_pm_opp_put(old_opp);
903 put_opp_table:
904 dev_pm_opp_put_opp_table(opp_table);
905 return ret;
906 }
907 EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
908
909
910 static void _remove_opp_dev(struct opp_device *opp_dev,
911 struct opp_table *opp_table)
912 {
913 opp_debug_unregister(opp_dev, opp_table);
914 list_del(&opp_dev->node);
915 kfree(opp_dev);
916 }
917
918 static struct opp_device *_add_opp_dev_unlocked(const struct device *dev,
919 struct opp_table *opp_table)
920 {
921 struct opp_device *opp_dev;
922
923 opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL);
924 if (!opp_dev)
925 return NULL;
926
927
928 opp_dev->dev = dev;
929
930 list_add(&opp_dev->node, &opp_table->dev_list);
931
932
933 opp_debug_register(opp_dev, opp_table);
934
935 return opp_dev;
936 }
937
938 struct opp_device *_add_opp_dev(const struct device *dev,
939 struct opp_table *opp_table)
940 {
941 struct opp_device *opp_dev;
942
943 mutex_lock(&opp_table->lock);
944 opp_dev = _add_opp_dev_unlocked(dev, opp_table);
945 mutex_unlock(&opp_table->lock);
946
947 return opp_dev;
948 }
949
950 static struct opp_table *_allocate_opp_table(struct device *dev, int index)
951 {
952 struct opp_table *opp_table;
953 struct opp_device *opp_dev;
954 int ret;
955
956
957
958
959
960 opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL);
961 if (!opp_table)
962 return NULL;
963
964 mutex_init(&opp_table->lock);
965 mutex_init(&opp_table->genpd_virt_dev_lock);
966 INIT_LIST_HEAD(&opp_table->dev_list);
967
968
969 opp_table->regulator_count = -1;
970
971 opp_dev = _add_opp_dev(dev, opp_table);
972 if (!opp_dev) {
973 kfree(opp_table);
974 return NULL;
975 }
976
977 _of_init_opp_table(opp_table, dev, index);
978
979
980 opp_table->clk = clk_get(dev, NULL);
981 if (IS_ERR(opp_table->clk)) {
982 ret = PTR_ERR(opp_table->clk);
983 if (ret != -EPROBE_DEFER)
984 dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__,
985 ret);
986 }
987
988 BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head);
989 INIT_LIST_HEAD(&opp_table->opp_list);
990 kref_init(&opp_table->kref);
991 kref_init(&opp_table->list_kref);
992
993
994 list_add(&opp_table->node, &opp_tables);
995 return opp_table;
996 }
997
998 void _get_opp_table_kref(struct opp_table *opp_table)
999 {
1000 kref_get(&opp_table->kref);
1001 }
1002
1003 static struct opp_table *_opp_get_opp_table(struct device *dev, int index)
1004 {
1005 struct opp_table *opp_table;
1006
1007
1008 mutex_lock(&opp_table_lock);
1009
1010 opp_table = _find_opp_table_unlocked(dev);
1011 if (!IS_ERR(opp_table))
1012 goto unlock;
1013
1014 opp_table = _managed_opp(dev, index);
1015 if (opp_table) {
1016 if (!_add_opp_dev_unlocked(dev, opp_table)) {
1017 dev_pm_opp_put_opp_table(opp_table);
1018 opp_table = NULL;
1019 }
1020 goto unlock;
1021 }
1022
1023 opp_table = _allocate_opp_table(dev, index);
1024
1025 unlock:
1026 mutex_unlock(&opp_table_lock);
1027
1028 return opp_table;
1029 }
1030
1031 struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
1032 {
1033 return _opp_get_opp_table(dev, 0);
1034 }
1035 EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table);
1036
1037 struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *dev,
1038 int index)
1039 {
1040 return _opp_get_opp_table(dev, index);
1041 }
1042
1043 static void _opp_table_kref_release(struct kref *kref)
1044 {
1045 struct opp_table *opp_table = container_of(kref, struct opp_table, kref);
1046 struct opp_device *opp_dev, *temp;
1047
1048 _of_clear_opp_table(opp_table);
1049
1050
1051 if (!IS_ERR(opp_table->clk))
1052 clk_put(opp_table->clk);
1053
1054 WARN_ON(!list_empty(&opp_table->opp_list));
1055
1056 list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) {
1057
1058
1059
1060
1061 if (opp_table->genpd_performance_state)
1062 dev_pm_genpd_set_performance_state((struct device *)(opp_dev->dev), 0);
1063
1064 _remove_opp_dev(opp_dev, opp_table);
1065 }
1066
1067 mutex_destroy(&opp_table->genpd_virt_dev_lock);
1068 mutex_destroy(&opp_table->lock);
1069 list_del(&opp_table->node);
1070 kfree(opp_table);
1071
1072 mutex_unlock(&opp_table_lock);
1073 }
1074
1075 void _opp_remove_all_static(struct opp_table *opp_table)
1076 {
1077 struct dev_pm_opp *opp, *tmp;
1078
1079 list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) {
1080 if (!opp->dynamic)
1081 dev_pm_opp_put(opp);
1082 }
1083
1084 opp_table->parsed_static_opps = false;
1085 }
1086
1087 static void _opp_table_list_kref_release(struct kref *kref)
1088 {
1089 struct opp_table *opp_table = container_of(kref, struct opp_table,
1090 list_kref);
1091
1092 _opp_remove_all_static(opp_table);
1093 mutex_unlock(&opp_table_lock);
1094 }
1095
1096 void _put_opp_list_kref(struct opp_table *opp_table)
1097 {
1098 kref_put_mutex(&opp_table->list_kref, _opp_table_list_kref_release,
1099 &opp_table_lock);
1100 }
1101
1102 void dev_pm_opp_put_opp_table(struct opp_table *opp_table)
1103 {
1104 kref_put_mutex(&opp_table->kref, _opp_table_kref_release,
1105 &opp_table_lock);
1106 }
1107 EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table);
1108
1109 void _opp_free(struct dev_pm_opp *opp)
1110 {
1111 kfree(opp);
1112 }
1113
1114 static void _opp_kref_release(struct dev_pm_opp *opp,
1115 struct opp_table *opp_table)
1116 {
1117
1118
1119
1120
1121 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp);
1122 _of_opp_free_required_opps(opp_table, opp);
1123 opp_debug_remove_one(opp);
1124 list_del(&opp->node);
1125 kfree(opp);
1126 }
1127
1128 static void _opp_kref_release_unlocked(struct kref *kref)
1129 {
1130 struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
1131 struct opp_table *opp_table = opp->opp_table;
1132
1133 _opp_kref_release(opp, opp_table);
1134 }
1135
1136 static void _opp_kref_release_locked(struct kref *kref)
1137 {
1138 struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
1139 struct opp_table *opp_table = opp->opp_table;
1140
1141 _opp_kref_release(opp, opp_table);
1142 mutex_unlock(&opp_table->lock);
1143 }
1144
1145 void dev_pm_opp_get(struct dev_pm_opp *opp)
1146 {
1147 kref_get(&opp->kref);
1148 }
1149
1150 void dev_pm_opp_put(struct dev_pm_opp *opp)
1151 {
1152 kref_put_mutex(&opp->kref, _opp_kref_release_locked,
1153 &opp->opp_table->lock);
1154 }
1155 EXPORT_SYMBOL_GPL(dev_pm_opp_put);
1156
1157 static void dev_pm_opp_put_unlocked(struct dev_pm_opp *opp)
1158 {
1159 kref_put(&opp->kref, _opp_kref_release_unlocked);
1160 }
1161
1162
1163
1164
1165
1166
1167
1168
1169 void dev_pm_opp_remove(struct device *dev, unsigned long freq)
1170 {
1171 struct dev_pm_opp *opp;
1172 struct opp_table *opp_table;
1173 bool found = false;
1174
1175 opp_table = _find_opp_table(dev);
1176 if (IS_ERR(opp_table))
1177 return;
1178
1179 mutex_lock(&opp_table->lock);
1180
1181 list_for_each_entry(opp, &opp_table->opp_list, node) {
1182 if (opp->rate == freq) {
1183 found = true;
1184 break;
1185 }
1186 }
1187
1188 mutex_unlock(&opp_table->lock);
1189
1190 if (found) {
1191 dev_pm_opp_put(opp);
1192
1193
1194 dev_pm_opp_put_opp_table(opp_table);
1195 } else {
1196 dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
1197 __func__, freq);
1198 }
1199
1200
1201 dev_pm_opp_put_opp_table(opp_table);
1202 }
1203 EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
1204
1205
1206
1207
1208
1209
1210
1211 void dev_pm_opp_remove_all_dynamic(struct device *dev)
1212 {
1213 struct opp_table *opp_table;
1214 struct dev_pm_opp *opp, *temp;
1215 int count = 0;
1216
1217 opp_table = _find_opp_table(dev);
1218 if (IS_ERR(opp_table))
1219 return;
1220
1221 mutex_lock(&opp_table->lock);
1222 list_for_each_entry_safe(opp, temp, &opp_table->opp_list, node) {
1223 if (opp->dynamic) {
1224 dev_pm_opp_put_unlocked(opp);
1225 count++;
1226 }
1227 }
1228 mutex_unlock(&opp_table->lock);
1229
1230
1231 while (count--)
1232 dev_pm_opp_put_opp_table(opp_table);
1233
1234
1235 dev_pm_opp_put_opp_table(opp_table);
1236 }
1237 EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic);
1238
1239 struct dev_pm_opp *_opp_allocate(struct opp_table *table)
1240 {
1241 struct dev_pm_opp *opp;
1242 int count, supply_size;
1243
1244
1245 count = table->regulator_count > 0 ? table->regulator_count : 1;
1246 supply_size = sizeof(*opp->supplies) * count;
1247
1248
1249 opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
1250 if (!opp)
1251 return NULL;
1252
1253
1254 opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
1255 INIT_LIST_HEAD(&opp->node);
1256
1257 return opp;
1258 }
1259
1260 static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
1261 struct opp_table *opp_table)
1262 {
1263 struct regulator *reg;
1264 int i;
1265
1266 if (!opp_table->regulators)
1267 return true;
1268
1269 for (i = 0; i < opp_table->regulator_count; i++) {
1270 reg = opp_table->regulators[i];
1271
1272 if (!regulator_is_supported_voltage(reg,
1273 opp->supplies[i].u_volt_min,
1274 opp->supplies[i].u_volt_max)) {
1275 pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
1276 __func__, opp->supplies[i].u_volt_min,
1277 opp->supplies[i].u_volt_max);
1278 return false;
1279 }
1280 }
1281
1282 return true;
1283 }
1284
1285 static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp,
1286 struct opp_table *opp_table,
1287 struct list_head **head)
1288 {
1289 struct dev_pm_opp *opp;
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299 list_for_each_entry(opp, &opp_table->opp_list, node) {
1300 if (new_opp->rate > opp->rate) {
1301 *head = &opp->node;
1302 continue;
1303 }
1304
1305 if (new_opp->rate < opp->rate)
1306 return 0;
1307
1308
1309 dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
1310 __func__, opp->rate, opp->supplies[0].u_volt,
1311 opp->available, new_opp->rate,
1312 new_opp->supplies[0].u_volt, new_opp->available);
1313
1314
1315 return opp->available &&
1316 new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST;
1317 }
1318
1319 return 0;
1320 }
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332 int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
1333 struct opp_table *opp_table, bool rate_not_available)
1334 {
1335 struct list_head *head;
1336 int ret;
1337
1338 mutex_lock(&opp_table->lock);
1339 head = &opp_table->opp_list;
1340
1341 if (likely(!rate_not_available)) {
1342 ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
1343 if (ret) {
1344 mutex_unlock(&opp_table->lock);
1345 return ret;
1346 }
1347 }
1348
1349 list_add(&new_opp->node, head);
1350 mutex_unlock(&opp_table->lock);
1351
1352 new_opp->opp_table = opp_table;
1353 kref_init(&new_opp->kref);
1354
1355 opp_debug_create_one(new_opp, opp_table);
1356
1357 if (!_opp_supported_by_regulators(new_opp, opp_table)) {
1358 new_opp->available = false;
1359 dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n",
1360 __func__, new_opp->rate);
1361 }
1362
1363 return 0;
1364 }
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388 int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
1389 unsigned long freq, long u_volt, bool dynamic)
1390 {
1391 struct dev_pm_opp *new_opp;
1392 unsigned long tol;
1393 int ret;
1394
1395 new_opp = _opp_allocate(opp_table);
1396 if (!new_opp)
1397 return -ENOMEM;
1398
1399
1400 new_opp->rate = freq;
1401 tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
1402 new_opp->supplies[0].u_volt = u_volt;
1403 new_opp->supplies[0].u_volt_min = u_volt - tol;
1404 new_opp->supplies[0].u_volt_max = u_volt + tol;
1405 new_opp->available = true;
1406 new_opp->dynamic = dynamic;
1407
1408 ret = _opp_add(dev, new_opp, opp_table, false);
1409 if (ret) {
1410
1411 if (ret == -EBUSY)
1412 ret = 0;
1413 goto free_opp;
1414 }
1415
1416
1417
1418
1419
1420 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp);
1421 return 0;
1422
1423 free_opp:
1424 _opp_free(new_opp);
1425
1426 return ret;
1427 }
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440 struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
1441 const u32 *versions, unsigned int count)
1442 {
1443 struct opp_table *opp_table;
1444
1445 opp_table = dev_pm_opp_get_opp_table(dev);
1446 if (!opp_table)
1447 return ERR_PTR(-ENOMEM);
1448
1449
1450 WARN_ON(!list_empty(&opp_table->opp_list));
1451
1452
1453 if (opp_table->supported_hw)
1454 return opp_table;
1455
1456 opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions),
1457 GFP_KERNEL);
1458 if (!opp_table->supported_hw) {
1459 dev_pm_opp_put_opp_table(opp_table);
1460 return ERR_PTR(-ENOMEM);
1461 }
1462
1463 opp_table->supported_hw_count = count;
1464
1465 return opp_table;
1466 }
1467 EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw);
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477 void dev_pm_opp_put_supported_hw(struct opp_table *opp_table)
1478 {
1479
1480 WARN_ON(!list_empty(&opp_table->opp_list));
1481
1482 kfree(opp_table->supported_hw);
1483 opp_table->supported_hw = NULL;
1484 opp_table->supported_hw_count = 0;
1485
1486 dev_pm_opp_put_opp_table(opp_table);
1487 }
1488 EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500 struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
1501 {
1502 struct opp_table *opp_table;
1503
1504 opp_table = dev_pm_opp_get_opp_table(dev);
1505 if (!opp_table)
1506 return ERR_PTR(-ENOMEM);
1507
1508
1509 WARN_ON(!list_empty(&opp_table->opp_list));
1510
1511
1512 if (opp_table->prop_name)
1513 return opp_table;
1514
1515 opp_table->prop_name = kstrdup(name, GFP_KERNEL);
1516 if (!opp_table->prop_name) {
1517 dev_pm_opp_put_opp_table(opp_table);
1518 return ERR_PTR(-ENOMEM);
1519 }
1520
1521 return opp_table;
1522 }
1523 EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name);
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533 void dev_pm_opp_put_prop_name(struct opp_table *opp_table)
1534 {
1535
1536 WARN_ON(!list_empty(&opp_table->opp_list));
1537
1538 kfree(opp_table->prop_name);
1539 opp_table->prop_name = NULL;
1540
1541 dev_pm_opp_put_opp_table(opp_table);
1542 }
1543 EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
1544
1545 static int _allocate_set_opp_data(struct opp_table *opp_table)
1546 {
1547 struct dev_pm_set_opp_data *data;
1548 int len, count = opp_table->regulator_count;
1549
1550 if (WARN_ON(!opp_table->regulators))
1551 return -EINVAL;
1552
1553
1554 len = sizeof(*data);
1555
1556
1557 len += 2 * sizeof(struct dev_pm_opp_supply) * count;
1558
1559 data = kzalloc(len, GFP_KERNEL);
1560 if (!data)
1561 return -ENOMEM;
1562
1563 data->old_opp.supplies = (void *)(data + 1);
1564 data->new_opp.supplies = data->old_opp.supplies + count;
1565
1566 opp_table->set_opp_data = data;
1567
1568 return 0;
1569 }
1570
1571 static void _free_set_opp_data(struct opp_table *opp_table)
1572 {
1573 kfree(opp_table->set_opp_data);
1574 opp_table->set_opp_data = NULL;
1575 }
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589 struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
1590 const char * const names[],
1591 unsigned int count)
1592 {
1593 struct opp_table *opp_table;
1594 struct regulator *reg;
1595 int ret, i;
1596
1597 opp_table = dev_pm_opp_get_opp_table(dev);
1598 if (!opp_table)
1599 return ERR_PTR(-ENOMEM);
1600
1601
1602 if (WARN_ON(!list_empty(&opp_table->opp_list))) {
1603 ret = -EBUSY;
1604 goto err;
1605 }
1606
1607
1608 if (opp_table->regulators)
1609 return opp_table;
1610
1611 opp_table->regulators = kmalloc_array(count,
1612 sizeof(*opp_table->regulators),
1613 GFP_KERNEL);
1614 if (!opp_table->regulators) {
1615 ret = -ENOMEM;
1616 goto err;
1617 }
1618
1619 for (i = 0; i < count; i++) {
1620 reg = regulator_get_optional(dev, names[i]);
1621 if (IS_ERR(reg)) {
1622 ret = PTR_ERR(reg);
1623 if (ret != -EPROBE_DEFER)
1624 dev_err(dev, "%s: no regulator (%s) found: %d\n",
1625 __func__, names[i], ret);
1626 goto free_regulators;
1627 }
1628
1629 opp_table->regulators[i] = reg;
1630 }
1631
1632 opp_table->regulator_count = count;
1633
1634
1635 ret = _allocate_set_opp_data(opp_table);
1636 if (ret)
1637 goto free_regulators;
1638
1639 return opp_table;
1640
1641 free_regulators:
1642 while (i != 0)
1643 regulator_put(opp_table->regulators[--i]);
1644
1645 kfree(opp_table->regulators);
1646 opp_table->regulators = NULL;
1647 opp_table->regulator_count = -1;
1648 err:
1649 dev_pm_opp_put_opp_table(opp_table);
1650
1651 return ERR_PTR(ret);
1652 }
1653 EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators);
1654
1655
1656
1657
1658
1659 void dev_pm_opp_put_regulators(struct opp_table *opp_table)
1660 {
1661 int i;
1662
1663 if (!opp_table->regulators)
1664 goto put_opp_table;
1665
1666
1667 WARN_ON(!list_empty(&opp_table->opp_list));
1668
1669 for (i = opp_table->regulator_count - 1; i >= 0; i--)
1670 regulator_put(opp_table->regulators[i]);
1671
1672 _free_set_opp_data(opp_table);
1673
1674 kfree(opp_table->regulators);
1675 opp_table->regulators = NULL;
1676 opp_table->regulator_count = -1;
1677
1678 put_opp_table:
1679 dev_pm_opp_put_opp_table(opp_table);
1680 }
1681 EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators);
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695 struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
1696 {
1697 struct opp_table *opp_table;
1698 int ret;
1699
1700 opp_table = dev_pm_opp_get_opp_table(dev);
1701 if (!opp_table)
1702 return ERR_PTR(-ENOMEM);
1703
1704
1705 if (WARN_ON(!list_empty(&opp_table->opp_list))) {
1706 ret = -EBUSY;
1707 goto err;
1708 }
1709
1710
1711 if (!IS_ERR(opp_table->clk))
1712 clk_put(opp_table->clk);
1713
1714
1715 opp_table->clk = clk_get(dev, name);
1716 if (IS_ERR(opp_table->clk)) {
1717 ret = PTR_ERR(opp_table->clk);
1718 if (ret != -EPROBE_DEFER) {
1719 dev_err(dev, "%s: Couldn't find clock: %d\n", __func__,
1720 ret);
1721 }
1722 goto err;
1723 }
1724
1725 return opp_table;
1726
1727 err:
1728 dev_pm_opp_put_opp_table(opp_table);
1729
1730 return ERR_PTR(ret);
1731 }
1732 EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname);
1733
1734
1735
1736
1737
1738 void dev_pm_opp_put_clkname(struct opp_table *opp_table)
1739 {
1740
1741 WARN_ON(!list_empty(&opp_table->opp_list));
1742
1743 clk_put(opp_table->clk);
1744 opp_table->clk = ERR_PTR(-EINVAL);
1745
1746 dev_pm_opp_put_opp_table(opp_table);
1747 }
1748 EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname);
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760 struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
1761 int (*set_opp)(struct dev_pm_set_opp_data *data))
1762 {
1763 struct opp_table *opp_table;
1764
1765 if (!set_opp)
1766 return ERR_PTR(-EINVAL);
1767
1768 opp_table = dev_pm_opp_get_opp_table(dev);
1769 if (!opp_table)
1770 return ERR_PTR(-ENOMEM);
1771
1772
1773 if (WARN_ON(!list_empty(&opp_table->opp_list))) {
1774 dev_pm_opp_put_opp_table(opp_table);
1775 return ERR_PTR(-EBUSY);
1776 }
1777
1778
1779 if (!opp_table->set_opp)
1780 opp_table->set_opp = set_opp;
1781
1782 return opp_table;
1783 }
1784 EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper);
1785
1786
1787
1788
1789
1790
1791
1792
1793 void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table)
1794 {
1795
1796 WARN_ON(!list_empty(&opp_table->opp_list));
1797
1798 opp_table->set_opp = NULL;
1799 dev_pm_opp_put_opp_table(opp_table);
1800 }
1801 EXPORT_SYMBOL_GPL(dev_pm_opp_unregister_set_opp_helper);
1802
1803 static void _opp_detach_genpd(struct opp_table *opp_table)
1804 {
1805 int index;
1806
1807 for (index = 0; index < opp_table->required_opp_count; index++) {
1808 if (!opp_table->genpd_virt_devs[index])
1809 continue;
1810
1811 dev_pm_domain_detach(opp_table->genpd_virt_devs[index], false);
1812 opp_table->genpd_virt_devs[index] = NULL;
1813 }
1814
1815 kfree(opp_table->genpd_virt_devs);
1816 opp_table->genpd_virt_devs = NULL;
1817 }
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841 struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
1842 const char **names, struct device ***virt_devs)
1843 {
1844 struct opp_table *opp_table;
1845 struct device *virt_dev;
1846 int index = 0, ret = -EINVAL;
1847 const char **name = names;
1848
1849 opp_table = dev_pm_opp_get_opp_table(dev);
1850 if (!opp_table)
1851 return ERR_PTR(-ENOMEM);
1852
1853
1854
1855
1856
1857
1858 if (!opp_table->required_opp_count) {
1859 ret = -EPROBE_DEFER;
1860 goto put_table;
1861 }
1862
1863 mutex_lock(&opp_table->genpd_virt_dev_lock);
1864
1865 opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count,
1866 sizeof(*opp_table->genpd_virt_devs),
1867 GFP_KERNEL);
1868 if (!opp_table->genpd_virt_devs)
1869 goto unlock;
1870
1871 while (*name) {
1872 if (index >= opp_table->required_opp_count) {
1873 dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n",
1874 *name, opp_table->required_opp_count, index);
1875 goto err;
1876 }
1877
1878 if (opp_table->genpd_virt_devs[index]) {
1879 dev_err(dev, "Genpd virtual device already set %s\n",
1880 *name);
1881 goto err;
1882 }
1883
1884 virt_dev = dev_pm_domain_attach_by_name(dev, *name);
1885 if (IS_ERR(virt_dev)) {
1886 ret = PTR_ERR(virt_dev);
1887 dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret);
1888 goto err;
1889 }
1890
1891 opp_table->genpd_virt_devs[index] = virt_dev;
1892 index++;
1893 name++;
1894 }
1895
1896 if (virt_devs)
1897 *virt_devs = opp_table->genpd_virt_devs;
1898 mutex_unlock(&opp_table->genpd_virt_dev_lock);
1899
1900 return opp_table;
1901
1902 err:
1903 _opp_detach_genpd(opp_table);
1904 unlock:
1905 mutex_unlock(&opp_table->genpd_virt_dev_lock);
1906
1907 put_table:
1908 dev_pm_opp_put_opp_table(opp_table);
1909
1910 return ERR_PTR(ret);
1911 }
1912 EXPORT_SYMBOL_GPL(dev_pm_opp_attach_genpd);
1913
1914
1915
1916
1917
1918
1919
1920
1921 void dev_pm_opp_detach_genpd(struct opp_table *opp_table)
1922 {
1923
1924
1925
1926
1927 mutex_lock(&opp_table->genpd_virt_dev_lock);
1928 _opp_detach_genpd(opp_table);
1929 mutex_unlock(&opp_table->genpd_virt_dev_lock);
1930
1931 dev_pm_opp_put_opp_table(opp_table);
1932 }
1933 EXPORT_SYMBOL_GPL(dev_pm_opp_detach_genpd);
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948 int dev_pm_opp_xlate_performance_state(struct opp_table *src_table,
1949 struct opp_table *dst_table,
1950 unsigned int pstate)
1951 {
1952 struct dev_pm_opp *opp;
1953 int dest_pstate = -EINVAL;
1954 int i;
1955
1956 if (!pstate)
1957 return 0;
1958
1959
1960
1961
1962
1963
1964
1965
1966 if (!src_table->required_opp_count)
1967 return pstate;
1968
1969 for (i = 0; i < src_table->required_opp_count; i++) {
1970 if (src_table->required_opp_tables[i]->np == dst_table->np)
1971 break;
1972 }
1973
1974 if (unlikely(i == src_table->required_opp_count)) {
1975 pr_err("%s: Couldn't find matching OPP table (%p: %p)\n",
1976 __func__, src_table, dst_table);
1977 return -EINVAL;
1978 }
1979
1980 mutex_lock(&src_table->lock);
1981
1982 list_for_each_entry(opp, &src_table->opp_list, node) {
1983 if (opp->pstate == pstate) {
1984 dest_pstate = opp->required_opps[i]->pstate;
1985 goto unlock;
1986 }
1987 }
1988
1989 pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table,
1990 dst_table);
1991
1992 unlock:
1993 mutex_unlock(&src_table->lock);
1994
1995 return dest_pstate;
1996 }
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015 int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
2016 {
2017 struct opp_table *opp_table;
2018 int ret;
2019
2020 opp_table = dev_pm_opp_get_opp_table(dev);
2021 if (!opp_table)
2022 return -ENOMEM;
2023
2024
2025 opp_table->regulator_count = 1;
2026
2027 ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
2028 if (ret)
2029 dev_pm_opp_put_opp_table(opp_table);
2030
2031 return ret;
2032 }
2033 EXPORT_SYMBOL_GPL(dev_pm_opp_add);
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048 static int _opp_set_availability(struct device *dev, unsigned long freq,
2049 bool availability_req)
2050 {
2051 struct opp_table *opp_table;
2052 struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
2053 int r = 0;
2054
2055
2056 opp_table = _find_opp_table(dev);
2057 if (IS_ERR(opp_table)) {
2058 r = PTR_ERR(opp_table);
2059 dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
2060 return r;
2061 }
2062
2063 mutex_lock(&opp_table->lock);
2064
2065
2066 list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
2067 if (tmp_opp->rate == freq) {
2068 opp = tmp_opp;
2069 break;
2070 }
2071 }
2072
2073 if (IS_ERR(opp)) {
2074 r = PTR_ERR(opp);
2075 goto unlock;
2076 }
2077
2078
2079 if (opp->available == availability_req)
2080 goto unlock;
2081
2082 opp->available = availability_req;
2083
2084 dev_pm_opp_get(opp);
2085 mutex_unlock(&opp_table->lock);
2086
2087
2088 if (availability_req)
2089 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE,
2090 opp);
2091 else
2092 blocking_notifier_call_chain(&opp_table->head,
2093 OPP_EVENT_DISABLE, opp);
2094
2095 dev_pm_opp_put(opp);
2096 goto put_table;
2097
2098 unlock:
2099 mutex_unlock(&opp_table->lock);
2100 put_table:
2101 dev_pm_opp_put_opp_table(opp_table);
2102 return r;
2103 }
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118 int dev_pm_opp_enable(struct device *dev, unsigned long freq)
2119 {
2120 return _opp_set_availability(dev, freq, true);
2121 }
2122 EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138 int dev_pm_opp_disable(struct device *dev, unsigned long freq)
2139 {
2140 return _opp_set_availability(dev, freq, false);
2141 }
2142 EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
2143
2144
2145
2146
2147
2148
2149
2150
2151 int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
2152 {
2153 struct opp_table *opp_table;
2154 int ret;
2155
2156 opp_table = _find_opp_table(dev);
2157 if (IS_ERR(opp_table))
2158 return PTR_ERR(opp_table);
2159
2160 ret = blocking_notifier_chain_register(&opp_table->head, nb);
2161
2162 dev_pm_opp_put_opp_table(opp_table);
2163
2164 return ret;
2165 }
2166 EXPORT_SYMBOL(dev_pm_opp_register_notifier);
2167
2168
2169
2170
2171
2172
2173
2174
2175 int dev_pm_opp_unregister_notifier(struct device *dev,
2176 struct notifier_block *nb)
2177 {
2178 struct opp_table *opp_table;
2179 int ret;
2180
2181 opp_table = _find_opp_table(dev);
2182 if (IS_ERR(opp_table))
2183 return PTR_ERR(opp_table);
2184
2185 ret = blocking_notifier_chain_unregister(&opp_table->head, nb);
2186
2187 dev_pm_opp_put_opp_table(opp_table);
2188
2189 return ret;
2190 }
2191 EXPORT_SYMBOL(dev_pm_opp_unregister_notifier);
2192
2193 void _dev_pm_opp_find_and_remove_table(struct device *dev)
2194 {
2195 struct opp_table *opp_table;
2196
2197
2198 opp_table = _find_opp_table(dev);
2199 if (IS_ERR(opp_table)) {
2200 int error = PTR_ERR(opp_table);
2201
2202 if (error != -ENODEV)
2203 WARN(1, "%s: opp_table: %d\n",
2204 IS_ERR_OR_NULL(dev) ?
2205 "Invalid device" : dev_name(dev),
2206 error);
2207 return;
2208 }
2209
2210 _put_opp_list_kref(opp_table);
2211
2212
2213 dev_pm_opp_put_opp_table(opp_table);
2214
2215
2216 dev_pm_opp_put_opp_table(opp_table);
2217 }
2218
2219
2220
2221
2222
2223
2224
2225
2226 void dev_pm_opp_remove_table(struct device *dev)
2227 {
2228 _dev_pm_opp_find_and_remove_table(dev);
2229 }
2230 EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);