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9
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
29LIST_HEAD(opp_tables);
30
31
32LIST_HEAD(lazy_opp_tables);
33
34
35DEFINE_MUTEX(opp_table_lock);
36
37static bool opp_tables_busy;
38
39static bool _find_opp_dev(const struct device *dev, struct opp_table *opp_table)
40{
41 struct opp_device *opp_dev;
42 bool found = false;
43
44 mutex_lock(&opp_table->lock);
45 list_for_each_entry(opp_dev, &opp_table->dev_list, node)
46 if (opp_dev->dev == dev) {
47 found = true;
48 break;
49 }
50
51 mutex_unlock(&opp_table->lock);
52 return found;
53}
54
55static struct opp_table *_find_opp_table_unlocked(struct device *dev)
56{
57 struct opp_table *opp_table;
58
59 list_for_each_entry(opp_table, &opp_tables, node) {
60 if (_find_opp_dev(dev, opp_table)) {
61 _get_opp_table_kref(opp_table);
62 return opp_table;
63 }
64 }
65
66 return ERR_PTR(-ENODEV);
67}
68
69
70
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72
73
74
75
76
77
78
79
80struct opp_table *_find_opp_table(struct device *dev)
81{
82 struct opp_table *opp_table;
83
84 if (IS_ERR_OR_NULL(dev)) {
85 pr_err("%s: Invalid parameters\n", __func__);
86 return ERR_PTR(-EINVAL);
87 }
88
89 mutex_lock(&opp_table_lock);
90 opp_table = _find_opp_table_unlocked(dev);
91 mutex_unlock(&opp_table_lock);
92
93 return opp_table;
94}
95
96
97
98
99
100
101
102
103
104
105unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
106{
107 if (IS_ERR_OR_NULL(opp)) {
108 pr_err("%s: Invalid parameters\n", __func__);
109 return 0;
110 }
111
112 return opp->supplies[0].u_volt;
113}
114EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
115
116
117
118
119
120
121
122
123unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
124{
125 if (IS_ERR_OR_NULL(opp)) {
126 pr_err("%s: Invalid parameters\n", __func__);
127 return 0;
128 }
129
130 return opp->rate;
131}
132EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
133
134
135
136
137
138
139
140
141unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
142{
143 if (IS_ERR_OR_NULL(opp) || !opp->available) {
144 pr_err("%s: Invalid parameters\n", __func__);
145 return 0;
146 }
147
148 return opp->level;
149}
150EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);
151
152
153
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155
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158
159
160
161unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
162 unsigned int index)
163{
164 if (IS_ERR_OR_NULL(opp) || !opp->available ||
165 index >= opp->opp_table->required_opp_count) {
166 pr_err("%s: Invalid parameters\n", __func__);
167 return 0;
168 }
169
170
171 if (lazy_linking_pending(opp->opp_table))
172 return 0;
173
174 return opp->required_opps[index]->pstate;
175}
176EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate);
177
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179
180
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185
186
187
188bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
189{
190 if (IS_ERR_OR_NULL(opp) || !opp->available) {
191 pr_err("%s: Invalid parameters\n", __func__);
192 return false;
193 }
194
195 return opp->turbo;
196}
197EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo);
198
199
200
201
202
203
204
205unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
206{
207 struct opp_table *opp_table;
208 unsigned long clock_latency_ns;
209
210 opp_table = _find_opp_table(dev);
211 if (IS_ERR(opp_table))
212 return 0;
213
214 clock_latency_ns = opp_table->clock_latency_ns_max;
215
216 dev_pm_opp_put_opp_table(opp_table);
217
218 return clock_latency_ns;
219}
220EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency);
221
222
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224
225
226
227
228unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
229{
230 struct opp_table *opp_table;
231 struct dev_pm_opp *opp;
232 struct regulator *reg;
233 unsigned long latency_ns = 0;
234 int ret, i, count;
235 struct {
236 unsigned long min;
237 unsigned long max;
238 } *uV;
239
240 opp_table = _find_opp_table(dev);
241 if (IS_ERR(opp_table))
242 return 0;
243
244
245 if (!opp_table->regulators)
246 goto put_opp_table;
247
248 count = opp_table->regulator_count;
249
250 uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL);
251 if (!uV)
252 goto put_opp_table;
253
254 mutex_lock(&opp_table->lock);
255
256 for (i = 0; i < count; i++) {
257 uV[i].min = ~0;
258 uV[i].max = 0;
259
260 list_for_each_entry(opp, &opp_table->opp_list, node) {
261 if (!opp->available)
262 continue;
263
264 if (opp->supplies[i].u_volt_min < uV[i].min)
265 uV[i].min = opp->supplies[i].u_volt_min;
266 if (opp->supplies[i].u_volt_max > uV[i].max)
267 uV[i].max = opp->supplies[i].u_volt_max;
268 }
269 }
270
271 mutex_unlock(&opp_table->lock);
272
273
274
275
276
277 for (i = 0; i < count; i++) {
278 reg = opp_table->regulators[i];
279 ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max);
280 if (ret > 0)
281 latency_ns += ret * 1000;
282 }
283
284 kfree(uV);
285put_opp_table:
286 dev_pm_opp_put_opp_table(opp_table);
287
288 return latency_ns;
289}
290EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency);
291
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293
294
295
296
297
298
299
300unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
301{
302 return dev_pm_opp_get_max_volt_latency(dev) +
303 dev_pm_opp_get_max_clock_latency(dev);
304}
305EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
306
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311
312
313
314unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
315{
316 struct opp_table *opp_table;
317 unsigned long freq = 0;
318
319 opp_table = _find_opp_table(dev);
320 if (IS_ERR(opp_table))
321 return 0;
322
323 if (opp_table->suspend_opp && opp_table->suspend_opp->available)
324 freq = dev_pm_opp_get_freq(opp_table->suspend_opp);
325
326 dev_pm_opp_put_opp_table(opp_table);
327
328 return freq;
329}
330EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq);
331
332int _get_opp_count(struct opp_table *opp_table)
333{
334 struct dev_pm_opp *opp;
335 int count = 0;
336
337 mutex_lock(&opp_table->lock);
338
339 list_for_each_entry(opp, &opp_table->opp_list, node) {
340 if (opp->available)
341 count++;
342 }
343
344 mutex_unlock(&opp_table->lock);
345
346 return count;
347}
348
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350
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353
354
355
356int dev_pm_opp_get_opp_count(struct device *dev)
357{
358 struct opp_table *opp_table;
359 int count;
360
361 opp_table = _find_opp_table(dev);
362 if (IS_ERR(opp_table)) {
363 count = PTR_ERR(opp_table);
364 dev_dbg(dev, "%s: OPP table not found (%d)\n",
365 __func__, count);
366 return count;
367 }
368
369 count = _get_opp_count(opp_table);
370 dev_pm_opp_put_opp_table(opp_table);
371
372 return count;
373}
374EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
375
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398
399struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
400 unsigned long freq,
401 bool available)
402{
403 struct opp_table *opp_table;
404 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
405
406 opp_table = _find_opp_table(dev);
407 if (IS_ERR(opp_table)) {
408 int r = PTR_ERR(opp_table);
409
410 dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
411 return ERR_PTR(r);
412 }
413
414 mutex_lock(&opp_table->lock);
415
416 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
417 if (temp_opp->available == available &&
418 temp_opp->rate == freq) {
419 opp = temp_opp;
420
421
422 dev_pm_opp_get(opp);
423 break;
424 }
425 }
426
427 mutex_unlock(&opp_table->lock);
428 dev_pm_opp_put_opp_table(opp_table);
429
430 return opp;
431}
432EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
433
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447
448
449struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
450 unsigned int level)
451{
452 struct opp_table *opp_table;
453 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
454
455 opp_table = _find_opp_table(dev);
456 if (IS_ERR(opp_table)) {
457 int r = PTR_ERR(opp_table);
458
459 dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
460 return ERR_PTR(r);
461 }
462
463 mutex_lock(&opp_table->lock);
464
465 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
466 if (temp_opp->level == level) {
467 opp = temp_opp;
468
469
470 dev_pm_opp_get(opp);
471 break;
472 }
473 }
474
475 mutex_unlock(&opp_table->lock);
476 dev_pm_opp_put_opp_table(opp_table);
477
478 return opp;
479}
480EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact);
481
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496
497struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
498 unsigned int *level)
499{
500 struct opp_table *opp_table;
501 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
502
503 opp_table = _find_opp_table(dev);
504 if (IS_ERR(opp_table)) {
505 int r = PTR_ERR(opp_table);
506
507 dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
508 return ERR_PTR(r);
509 }
510
511 mutex_lock(&opp_table->lock);
512
513 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
514 if (temp_opp->available && temp_opp->level >= *level) {
515 opp = temp_opp;
516 *level = opp->level;
517
518
519 dev_pm_opp_get(opp);
520 break;
521 }
522 }
523
524 mutex_unlock(&opp_table->lock);
525 dev_pm_opp_put_opp_table(opp_table);
526
527 return opp;
528}
529EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil);
530
531static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table,
532 unsigned long *freq)
533{
534 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
535
536 mutex_lock(&opp_table->lock);
537
538 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
539 if (temp_opp->available && temp_opp->rate >= *freq) {
540 opp = temp_opp;
541 *freq = opp->rate;
542
543
544 dev_pm_opp_get(opp);
545 break;
546 }
547 }
548
549 mutex_unlock(&opp_table->lock);
550
551 return opp;
552}
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571
572struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
573 unsigned long *freq)
574{
575 struct opp_table *opp_table;
576 struct dev_pm_opp *opp;
577
578 if (!dev || !freq) {
579 dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
580 return ERR_PTR(-EINVAL);
581 }
582
583 opp_table = _find_opp_table(dev);
584 if (IS_ERR(opp_table))
585 return ERR_CAST(opp_table);
586
587 opp = _find_freq_ceil(opp_table, freq);
588
589 dev_pm_opp_put_opp_table(opp_table);
590
591 return opp;
592}
593EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
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613struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
614 unsigned long *freq)
615{
616 struct opp_table *opp_table;
617 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
618
619 if (!dev || !freq) {
620 dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
621 return ERR_PTR(-EINVAL);
622 }
623
624 opp_table = _find_opp_table(dev);
625 if (IS_ERR(opp_table))
626 return ERR_CAST(opp_table);
627
628 mutex_lock(&opp_table->lock);
629
630 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
631 if (temp_opp->available) {
632
633 if (temp_opp->rate > *freq)
634 break;
635 else
636 opp = temp_opp;
637 }
638 }
639
640
641 if (!IS_ERR(opp))
642 dev_pm_opp_get(opp);
643 mutex_unlock(&opp_table->lock);
644 dev_pm_opp_put_opp_table(opp_table);
645
646 if (!IS_ERR(opp))
647 *freq = opp->rate;
648
649 return opp;
650}
651EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
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668
669
670struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
671 unsigned long u_volt)
672{
673 struct opp_table *opp_table;
674 struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
675
676 if (!dev || !u_volt) {
677 dev_err(dev, "%s: Invalid argument volt=%lu\n", __func__,
678 u_volt);
679 return ERR_PTR(-EINVAL);
680 }
681
682 opp_table = _find_opp_table(dev);
683 if (IS_ERR(opp_table))
684 return ERR_CAST(opp_table);
685
686 mutex_lock(&opp_table->lock);
687
688 list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
689 if (temp_opp->available) {
690 if (temp_opp->supplies[0].u_volt > u_volt)
691 break;
692 opp = temp_opp;
693 }
694 }
695
696
697 if (!IS_ERR(opp))
698 dev_pm_opp_get(opp);
699
700 mutex_unlock(&opp_table->lock);
701 dev_pm_opp_put_opp_table(opp_table);
702
703 return opp;
704}
705EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_by_volt);
706
707static int _set_opp_voltage(struct device *dev, struct regulator *reg,
708 struct dev_pm_opp_supply *supply)
709{
710 int ret;
711
712
713 if (IS_ERR(reg)) {
714 dev_dbg(dev, "%s: regulator not available: %ld\n", __func__,
715 PTR_ERR(reg));
716 return 0;
717 }
718
719 dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__,
720 supply->u_volt_min, supply->u_volt, supply->u_volt_max);
721
722 ret = regulator_set_voltage_triplet(reg, supply->u_volt_min,
723 supply->u_volt, supply->u_volt_max);
724 if (ret)
725 dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n",
726 __func__, supply->u_volt_min, supply->u_volt,
727 supply->u_volt_max, ret);
728
729 return ret;
730}
731
732static inline int _generic_set_opp_clk_only(struct device *dev, struct clk *clk,
733 unsigned long freq)
734{
735 int ret;
736
737
738 if (IS_ERR(clk))
739 return 0;
740
741 ret = clk_set_rate(clk, freq);
742 if (ret) {
743 dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
744 ret);
745 }
746
747 return ret;
748}
749
750static int _generic_set_opp_regulator(struct opp_table *opp_table,
751 struct device *dev,
752 struct dev_pm_opp *opp,
753 unsigned long freq,
754 int scaling_down)
755{
756 struct regulator *reg = opp_table->regulators[0];
757 struct dev_pm_opp *old_opp = opp_table->current_opp;
758 int ret;
759
760
761 if (WARN_ON(opp_table->regulator_count > 1)) {
762 dev_err(dev, "multiple regulators are not supported\n");
763 return -EINVAL;
764 }
765
766
767 if (!scaling_down) {
768 ret = _set_opp_voltage(dev, reg, opp->supplies);
769 if (ret)
770 goto restore_voltage;
771 }
772
773
774 ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq);
775 if (ret)
776 goto restore_voltage;
777
778
779 if (scaling_down) {
780 ret = _set_opp_voltage(dev, reg, opp->supplies);
781 if (ret)
782 goto restore_freq;
783 }
784
785
786
787
788
789 if (unlikely(!opp_table->enabled)) {
790 ret = regulator_enable(reg);
791 if (ret < 0)
792 dev_warn(dev, "Failed to enable regulator: %d", ret);
793 }
794
795 return 0;
796
797restore_freq:
798 if (_generic_set_opp_clk_only(dev, opp_table->clk, old_opp->rate))
799 dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
800 __func__, old_opp->rate);
801restore_voltage:
802
803 _set_opp_voltage(dev, reg, old_opp->supplies);
804
805 return ret;
806}
807
808static int _set_opp_bw(const struct opp_table *opp_table,
809 struct dev_pm_opp *opp, struct device *dev)
810{
811 u32 avg, peak;
812 int i, ret;
813
814 if (!opp_table->paths)
815 return 0;
816
817 for (i = 0; i < opp_table->path_count; i++) {
818 if (!opp) {
819 avg = 0;
820 peak = 0;
821 } else {
822 avg = opp->bandwidth[i].avg;
823 peak = opp->bandwidth[i].peak;
824 }
825 ret = icc_set_bw(opp_table->paths[i], avg, peak);
826 if (ret) {
827 dev_err(dev, "Failed to %s bandwidth[%d]: %d\n",
828 opp ? "set" : "remove", i, ret);
829 return ret;
830 }
831 }
832
833 return 0;
834}
835
836static int _set_opp_custom(const struct opp_table *opp_table,
837 struct device *dev, struct dev_pm_opp *opp,
838 unsigned long freq)
839{
840 struct dev_pm_set_opp_data *data = opp_table->set_opp_data;
841 struct dev_pm_opp *old_opp = opp_table->current_opp;
842 int size;
843
844
845
846
847
848 if (opp_table->sod_supplies) {
849 size = sizeof(*old_opp->supplies) * opp_table->regulator_count;
850 memcpy(data->old_opp.supplies, old_opp->supplies, size);
851 memcpy(data->new_opp.supplies, opp->supplies, size);
852 data->regulator_count = opp_table->regulator_count;
853 } else {
854 data->regulator_count = 0;
855 }
856
857 data->regulators = opp_table->regulators;
858 data->clk = opp_table->clk;
859 data->dev = dev;
860 data->old_opp.rate = old_opp->rate;
861 data->new_opp.rate = freq;
862
863 return opp_table->set_opp(data);
864}
865
866static int _set_required_opp(struct device *dev, struct device *pd_dev,
867 struct dev_pm_opp *opp, int i)
868{
869 unsigned int pstate = likely(opp) ? opp->required_opps[i]->pstate : 0;
870 int ret;
871
872 if (!pd_dev)
873 return 0;
874
875 ret = dev_pm_genpd_set_performance_state(pd_dev, pstate);
876 if (ret) {
877 dev_err(dev, "Failed to set performance rate of %s: %d (%d)\n",
878 dev_name(pd_dev), pstate, ret);
879 }
880
881 return ret;
882}
883
884
885static int _set_required_opps(struct device *dev,
886 struct opp_table *opp_table,
887 struct dev_pm_opp *opp, bool up)
888{
889 struct opp_table **required_opp_tables = opp_table->required_opp_tables;
890 struct device **genpd_virt_devs = opp_table->genpd_virt_devs;
891 int i, ret = 0;
892
893 if (!required_opp_tables)
894 return 0;
895
896
897 if (lazy_linking_pending(opp_table))
898 return -EBUSY;
899
900
901
902
903
904
905 if (unlikely(!required_opp_tables[0]->is_genpd)) {
906 dev_err(dev, "required-opps don't belong to a genpd\n");
907 return -ENOENT;
908 }
909
910
911 if (!genpd_virt_devs)
912 return _set_required_opp(dev, dev, opp, 0);
913
914
915
916
917
918
919
920 mutex_lock(&opp_table->genpd_virt_dev_lock);
921
922
923 if (up) {
924 for (i = 0; i < opp_table->required_opp_count; i++) {
925 ret = _set_required_opp(dev, genpd_virt_devs[i], opp, i);
926 if (ret)
927 break;
928 }
929 } else {
930 for (i = opp_table->required_opp_count - 1; i >= 0; i--) {
931 ret = _set_required_opp(dev, genpd_virt_devs[i], opp, i);
932 if (ret)
933 break;
934 }
935 }
936
937 mutex_unlock(&opp_table->genpd_virt_dev_lock);
938
939 return ret;
940}
941
942static void _find_current_opp(struct device *dev, struct opp_table *opp_table)
943{
944 struct dev_pm_opp *opp = ERR_PTR(-ENODEV);
945 unsigned long freq;
946
947 if (!IS_ERR(opp_table->clk)) {
948 freq = clk_get_rate(opp_table->clk);
949 opp = _find_freq_ceil(opp_table, &freq);
950 }
951
952
953
954
955
956
957 if (IS_ERR(opp)) {
958 mutex_lock(&opp_table->lock);
959 opp = list_first_entry(&opp_table->opp_list, struct dev_pm_opp, node);
960 dev_pm_opp_get(opp);
961 mutex_unlock(&opp_table->lock);
962 }
963
964 opp_table->current_opp = opp;
965}
966
967static int _disable_opp_table(struct device *dev, struct opp_table *opp_table)
968{
969 int ret;
970
971 if (!opp_table->enabled)
972 return 0;
973
974
975
976
977
978
979 if (!_get_opp_count(opp_table))
980 return 0;
981
982 ret = _set_opp_bw(opp_table, NULL, dev);
983 if (ret)
984 return ret;
985
986 if (opp_table->regulators)
987 regulator_disable(opp_table->regulators[0]);
988
989 ret = _set_required_opps(dev, opp_table, NULL, false);
990
991 opp_table->enabled = false;
992 return ret;
993}
994
995static int _set_opp(struct device *dev, struct opp_table *opp_table,
996 struct dev_pm_opp *opp, unsigned long freq)
997{
998 struct dev_pm_opp *old_opp;
999 int scaling_down, ret;
1000
1001 if (unlikely(!opp))
1002 return _disable_opp_table(dev, opp_table);
1003
1004
1005 if (unlikely(!opp_table->current_opp))
1006 _find_current_opp(dev, opp_table);
1007
1008 old_opp = opp_table->current_opp;
1009
1010
1011 if (old_opp == opp && opp_table->current_rate == freq &&
1012 opp_table->enabled) {
1013 dev_dbg(dev, "%s: OPPs are same, nothing to do\n", __func__);
1014 return 0;
1015 }
1016
1017 dev_dbg(dev, "%s: switching OPP: Freq %lu -> %lu Hz, Level %u -> %u, Bw %u -> %u\n",
1018 __func__, opp_table->current_rate, freq, old_opp->level,
1019 opp->level, old_opp->bandwidth ? old_opp->bandwidth[0].peak : 0,
1020 opp->bandwidth ? opp->bandwidth[0].peak : 0);
1021
1022 scaling_down = _opp_compare_key(old_opp, opp);
1023 if (scaling_down == -1)
1024 scaling_down = 0;
1025
1026
1027 if (!scaling_down) {
1028 ret = _set_required_opps(dev, opp_table, opp, true);
1029 if (ret) {
1030 dev_err(dev, "Failed to set required opps: %d\n", ret);
1031 return ret;
1032 }
1033
1034 ret = _set_opp_bw(opp_table, opp, dev);
1035 if (ret) {
1036 dev_err(dev, "Failed to set bw: %d\n", ret);
1037 return ret;
1038 }
1039 }
1040
1041 if (opp_table->set_opp) {
1042 ret = _set_opp_custom(opp_table, dev, opp, freq);
1043 } else if (opp_table->regulators) {
1044 ret = _generic_set_opp_regulator(opp_table, dev, opp, freq,
1045 scaling_down);
1046 } else {
1047
1048 ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq);
1049 }
1050
1051 if (ret)
1052 return ret;
1053
1054
1055 if (scaling_down) {
1056 ret = _set_opp_bw(opp_table, opp, dev);
1057 if (ret) {
1058 dev_err(dev, "Failed to set bw: %d\n", ret);
1059 return ret;
1060 }
1061
1062 ret = _set_required_opps(dev, opp_table, opp, false);
1063 if (ret) {
1064 dev_err(dev, "Failed to set required opps: %d\n", ret);
1065 return ret;
1066 }
1067 }
1068
1069 opp_table->enabled = true;
1070 dev_pm_opp_put(old_opp);
1071
1072
1073 dev_pm_opp_get(opp);
1074 opp_table->current_opp = opp;
1075 opp_table->current_rate = freq;
1076
1077 return ret;
1078}
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
1092{
1093 struct opp_table *opp_table;
1094 unsigned long freq = 0, temp_freq;
1095 struct dev_pm_opp *opp = NULL;
1096 int ret;
1097
1098 opp_table = _find_opp_table(dev);
1099 if (IS_ERR(opp_table)) {
1100 dev_err(dev, "%s: device's opp table doesn't exist\n", __func__);
1101 return PTR_ERR(opp_table);
1102 }
1103
1104 if (target_freq) {
1105
1106
1107
1108
1109
1110
1111
1112 if (!_get_opp_count(opp_table)) {
1113 ret = _generic_set_opp_clk_only(dev, opp_table->clk, target_freq);
1114 goto put_opp_table;
1115 }
1116
1117 freq = clk_round_rate(opp_table->clk, target_freq);
1118 if ((long)freq <= 0)
1119 freq = target_freq;
1120
1121
1122
1123
1124
1125
1126 temp_freq = freq;
1127 opp = _find_freq_ceil(opp_table, &temp_freq);
1128 if (IS_ERR(opp)) {
1129 ret = PTR_ERR(opp);
1130 dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",
1131 __func__, freq, ret);
1132 goto put_opp_table;
1133 }
1134 }
1135
1136 ret = _set_opp(dev, opp_table, opp, freq);
1137
1138 if (target_freq)
1139 dev_pm_opp_put(opp);
1140put_opp_table:
1141 dev_pm_opp_put_opp_table(opp_table);
1142 return ret;
1143}
1144EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp)
1157{
1158 struct opp_table *opp_table;
1159 int ret;
1160
1161 opp_table = _find_opp_table(dev);
1162 if (IS_ERR(opp_table)) {
1163 dev_err(dev, "%s: device opp doesn't exist\n", __func__);
1164 return PTR_ERR(opp_table);
1165 }
1166
1167 ret = _set_opp(dev, opp_table, opp, opp ? opp->rate : 0);
1168 dev_pm_opp_put_opp_table(opp_table);
1169
1170 return ret;
1171}
1172EXPORT_SYMBOL_GPL(dev_pm_opp_set_opp);
1173
1174
1175static void _remove_opp_dev(struct opp_device *opp_dev,
1176 struct opp_table *opp_table)
1177{
1178 opp_debug_unregister(opp_dev, opp_table);
1179 list_del(&opp_dev->node);
1180 kfree(opp_dev);
1181}
1182
1183struct opp_device *_add_opp_dev(const struct device *dev,
1184 struct opp_table *opp_table)
1185{
1186 struct opp_device *opp_dev;
1187
1188 opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL);
1189 if (!opp_dev)
1190 return NULL;
1191
1192
1193 opp_dev->dev = dev;
1194
1195 mutex_lock(&opp_table->lock);
1196 list_add(&opp_dev->node, &opp_table->dev_list);
1197 mutex_unlock(&opp_table->lock);
1198
1199
1200 opp_debug_register(opp_dev, opp_table);
1201
1202 return opp_dev;
1203}
1204
1205static struct opp_table *_allocate_opp_table(struct device *dev, int index)
1206{
1207 struct opp_table *opp_table;
1208 struct opp_device *opp_dev;
1209 int ret;
1210
1211
1212
1213
1214
1215 opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL);
1216 if (!opp_table)
1217 return ERR_PTR(-ENOMEM);
1218
1219 mutex_init(&opp_table->lock);
1220 mutex_init(&opp_table->genpd_virt_dev_lock);
1221 INIT_LIST_HEAD(&opp_table->dev_list);
1222 INIT_LIST_HEAD(&opp_table->lazy);
1223
1224
1225 opp_table->regulator_count = -1;
1226
1227 opp_dev = _add_opp_dev(dev, opp_table);
1228 if (!opp_dev) {
1229 ret = -ENOMEM;
1230 goto err;
1231 }
1232
1233 _of_init_opp_table(opp_table, dev, index);
1234
1235
1236 ret = dev_pm_opp_of_find_icc_paths(dev, opp_table);
1237 if (ret) {
1238 if (ret == -EPROBE_DEFER)
1239 goto remove_opp_dev;
1240
1241 dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
1242 __func__, ret);
1243 }
1244
1245 BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head);
1246 INIT_LIST_HEAD(&opp_table->opp_list);
1247 kref_init(&opp_table->kref);
1248
1249 return opp_table;
1250
1251remove_opp_dev:
1252 _remove_opp_dev(opp_dev, opp_table);
1253err:
1254 kfree(opp_table);
1255 return ERR_PTR(ret);
1256}
1257
1258void _get_opp_table_kref(struct opp_table *opp_table)
1259{
1260 kref_get(&opp_table->kref);
1261}
1262
1263static struct opp_table *_update_opp_table_clk(struct device *dev,
1264 struct opp_table *opp_table,
1265 bool getclk)
1266{
1267 int ret;
1268
1269
1270
1271
1272
1273 if (!getclk || IS_ERR(opp_table) || opp_table->clk)
1274 return opp_table;
1275
1276
1277 opp_table->clk = clk_get(dev, NULL);
1278
1279 ret = PTR_ERR_OR_ZERO(opp_table->clk);
1280 if (!ret)
1281 return opp_table;
1282
1283 if (ret == -ENOENT) {
1284 dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
1285 return opp_table;
1286 }
1287
1288 dev_pm_opp_put_opp_table(opp_table);
1289 dev_err_probe(dev, ret, "Couldn't find clock\n");
1290
1291 return ERR_PTR(ret);
1292}
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309struct opp_table *_add_opp_table_indexed(struct device *dev, int index,
1310 bool getclk)
1311{
1312 struct opp_table *opp_table;
1313
1314again:
1315 mutex_lock(&opp_table_lock);
1316
1317 opp_table = _find_opp_table_unlocked(dev);
1318 if (!IS_ERR(opp_table))
1319 goto unlock;
1320
1321
1322
1323
1324
1325 if (unlikely(opp_tables_busy)) {
1326 mutex_unlock(&opp_table_lock);
1327 cpu_relax();
1328 goto again;
1329 }
1330
1331 opp_tables_busy = true;
1332 opp_table = _managed_opp(dev, index);
1333
1334
1335 mutex_unlock(&opp_table_lock);
1336
1337 if (opp_table) {
1338 if (!_add_opp_dev(dev, opp_table)) {
1339 dev_pm_opp_put_opp_table(opp_table);
1340 opp_table = ERR_PTR(-ENOMEM);
1341 }
1342
1343 mutex_lock(&opp_table_lock);
1344 } else {
1345 opp_table = _allocate_opp_table(dev, index);
1346
1347 mutex_lock(&opp_table_lock);
1348 if (!IS_ERR(opp_table))
1349 list_add(&opp_table->node, &opp_tables);
1350 }
1351
1352 opp_tables_busy = false;
1353
1354unlock:
1355 mutex_unlock(&opp_table_lock);
1356
1357 return _update_opp_table_clk(dev, opp_table, getclk);
1358}
1359
1360static struct opp_table *_add_opp_table(struct device *dev, bool getclk)
1361{
1362 return _add_opp_table_indexed(dev, 0, getclk);
1363}
1364
1365struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
1366{
1367 return _find_opp_table(dev);
1368}
1369EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table);
1370
1371static void _opp_table_kref_release(struct kref *kref)
1372{
1373 struct opp_table *opp_table = container_of(kref, struct opp_table, kref);
1374 struct opp_device *opp_dev, *temp;
1375 int i;
1376
1377
1378 list_del(&opp_table->node);
1379 mutex_unlock(&opp_table_lock);
1380
1381 if (opp_table->current_opp)
1382 dev_pm_opp_put(opp_table->current_opp);
1383
1384 _of_clear_opp_table(opp_table);
1385
1386
1387 if (!IS_ERR(opp_table->clk))
1388 clk_put(opp_table->clk);
1389
1390 if (opp_table->paths) {
1391 for (i = 0; i < opp_table->path_count; i++)
1392 icc_put(opp_table->paths[i]);
1393 kfree(opp_table->paths);
1394 }
1395
1396 WARN_ON(!list_empty(&opp_table->opp_list));
1397
1398 list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) {
1399
1400
1401
1402
1403 if (opp_table->genpd_performance_state)
1404 dev_pm_genpd_set_performance_state((struct device *)(opp_dev->dev), 0);
1405
1406 _remove_opp_dev(opp_dev, opp_table);
1407 }
1408
1409 mutex_destroy(&opp_table->genpd_virt_dev_lock);
1410 mutex_destroy(&opp_table->lock);
1411 kfree(opp_table);
1412}
1413
1414void dev_pm_opp_put_opp_table(struct opp_table *opp_table)
1415{
1416 kref_put_mutex(&opp_table->kref, _opp_table_kref_release,
1417 &opp_table_lock);
1418}
1419EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table);
1420
1421void _opp_free(struct dev_pm_opp *opp)
1422{
1423 kfree(opp);
1424}
1425
1426static void _opp_kref_release(struct kref *kref)
1427{
1428 struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
1429 struct opp_table *opp_table = opp->opp_table;
1430
1431 list_del(&opp->node);
1432 mutex_unlock(&opp_table->lock);
1433
1434
1435
1436
1437
1438 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp);
1439 _of_opp_free_required_opps(opp_table, opp);
1440 opp_debug_remove_one(opp);
1441 kfree(opp);
1442}
1443
1444void dev_pm_opp_get(struct dev_pm_opp *opp)
1445{
1446 kref_get(&opp->kref);
1447}
1448
1449void dev_pm_opp_put(struct dev_pm_opp *opp)
1450{
1451 kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock);
1452}
1453EXPORT_SYMBOL_GPL(dev_pm_opp_put);
1454
1455
1456
1457
1458
1459
1460
1461
1462void dev_pm_opp_remove(struct device *dev, unsigned long freq)
1463{
1464 struct dev_pm_opp *opp;
1465 struct opp_table *opp_table;
1466 bool found = false;
1467
1468 opp_table = _find_opp_table(dev);
1469 if (IS_ERR(opp_table))
1470 return;
1471
1472 mutex_lock(&opp_table->lock);
1473
1474 list_for_each_entry(opp, &opp_table->opp_list, node) {
1475 if (opp->rate == freq) {
1476 found = true;
1477 break;
1478 }
1479 }
1480
1481 mutex_unlock(&opp_table->lock);
1482
1483 if (found) {
1484 dev_pm_opp_put(opp);
1485
1486
1487 dev_pm_opp_put_opp_table(opp_table);
1488 } else {
1489 dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
1490 __func__, freq);
1491 }
1492
1493
1494 dev_pm_opp_put_opp_table(opp_table);
1495}
1496EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
1497
1498static struct dev_pm_opp *_opp_get_next(struct opp_table *opp_table,
1499 bool dynamic)
1500{
1501 struct dev_pm_opp *opp = NULL, *temp;
1502
1503 mutex_lock(&opp_table->lock);
1504 list_for_each_entry(temp, &opp_table->opp_list, node) {
1505
1506
1507
1508
1509 if (!temp->removed && dynamic == temp->dynamic) {
1510 opp = temp;
1511 break;
1512 }
1513 }
1514
1515 mutex_unlock(&opp_table->lock);
1516 return opp;
1517}
1518
1519
1520
1521
1522
1523
1524static void _opp_remove_all(struct opp_table *opp_table, bool dynamic)
1525{
1526 struct dev_pm_opp *opp;
1527
1528 while ((opp = _opp_get_next(opp_table, dynamic))) {
1529 opp->removed = true;
1530 dev_pm_opp_put(opp);
1531
1532
1533 if (dynamic)
1534 dev_pm_opp_put_opp_table(opp_table);
1535 }
1536}
1537
1538bool _opp_remove_all_static(struct opp_table *opp_table)
1539{
1540 mutex_lock(&opp_table->lock);
1541
1542 if (!opp_table->parsed_static_opps) {
1543 mutex_unlock(&opp_table->lock);
1544 return false;
1545 }
1546
1547 if (--opp_table->parsed_static_opps) {
1548 mutex_unlock(&opp_table->lock);
1549 return true;
1550 }
1551
1552 mutex_unlock(&opp_table->lock);
1553
1554 _opp_remove_all(opp_table, false);
1555 return true;
1556}
1557
1558
1559
1560
1561
1562
1563
1564void dev_pm_opp_remove_all_dynamic(struct device *dev)
1565{
1566 struct opp_table *opp_table;
1567
1568 opp_table = _find_opp_table(dev);
1569 if (IS_ERR(opp_table))
1570 return;
1571
1572 _opp_remove_all(opp_table, true);
1573
1574
1575 dev_pm_opp_put_opp_table(opp_table);
1576}
1577EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic);
1578
1579struct dev_pm_opp *_opp_allocate(struct opp_table *table)
1580{
1581 struct dev_pm_opp *opp;
1582 int supply_count, supply_size, icc_size;
1583
1584
1585 supply_count = table->regulator_count > 0 ? table->regulator_count : 1;
1586 supply_size = sizeof(*opp->supplies) * supply_count;
1587 icc_size = sizeof(*opp->bandwidth) * table->path_count;
1588
1589
1590 opp = kzalloc(sizeof(*opp) + supply_size + icc_size, GFP_KERNEL);
1591
1592 if (!opp)
1593 return NULL;
1594
1595
1596 opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
1597 if (icc_size)
1598 opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count);
1599 INIT_LIST_HEAD(&opp->node);
1600
1601 return opp;
1602}
1603
1604static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
1605 struct opp_table *opp_table)
1606{
1607 struct regulator *reg;
1608 int i;
1609
1610 if (!opp_table->regulators)
1611 return true;
1612
1613 for (i = 0; i < opp_table->regulator_count; i++) {
1614 reg = opp_table->regulators[i];
1615
1616 if (!regulator_is_supported_voltage(reg,
1617 opp->supplies[i].u_volt_min,
1618 opp->supplies[i].u_volt_max)) {
1619 pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
1620 __func__, opp->supplies[i].u_volt_min,
1621 opp->supplies[i].u_volt_max);
1622 return false;
1623 }
1624 }
1625
1626 return true;
1627}
1628
1629int _opp_compare_key(struct dev_pm_opp *opp1, struct dev_pm_opp *opp2)
1630{
1631 if (opp1->rate != opp2->rate)
1632 return opp1->rate < opp2->rate ? -1 : 1;
1633 if (opp1->bandwidth && opp2->bandwidth &&
1634 opp1->bandwidth[0].peak != opp2->bandwidth[0].peak)
1635 return opp1->bandwidth[0].peak < opp2->bandwidth[0].peak ? -1 : 1;
1636 if (opp1->level != opp2->level)
1637 return opp1->level < opp2->level ? -1 : 1;
1638 return 0;
1639}
1640
1641static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp,
1642 struct opp_table *opp_table,
1643 struct list_head **head)
1644{
1645 struct dev_pm_opp *opp;
1646 int opp_cmp;
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656 list_for_each_entry(opp, &opp_table->opp_list, node) {
1657 opp_cmp = _opp_compare_key(new_opp, opp);
1658 if (opp_cmp > 0) {
1659 *head = &opp->node;
1660 continue;
1661 }
1662
1663 if (opp_cmp < 0)
1664 return 0;
1665
1666
1667 dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
1668 __func__, opp->rate, opp->supplies[0].u_volt,
1669 opp->available, new_opp->rate,
1670 new_opp->supplies[0].u_volt, new_opp->available);
1671
1672
1673 return opp->available &&
1674 new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST;
1675 }
1676
1677 return 0;
1678}
1679
1680void _required_opps_available(struct dev_pm_opp *opp, int count)
1681{
1682 int i;
1683
1684 for (i = 0; i < count; i++) {
1685 if (opp->required_opps[i]->available)
1686 continue;
1687
1688 opp->available = false;
1689 pr_warn("%s: OPP not supported by required OPP %pOF (%lu)\n",
1690 __func__, opp->required_opps[i]->np, opp->rate);
1691 return;
1692 }
1693}
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
1706 struct opp_table *opp_table, bool rate_not_available)
1707{
1708 struct list_head *head;
1709 int ret;
1710
1711 mutex_lock(&opp_table->lock);
1712 head = &opp_table->opp_list;
1713
1714 ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
1715 if (ret) {
1716 mutex_unlock(&opp_table->lock);
1717 return ret;
1718 }
1719
1720 list_add(&new_opp->node, head);
1721 mutex_unlock(&opp_table->lock);
1722
1723 new_opp->opp_table = opp_table;
1724 kref_init(&new_opp->kref);
1725
1726 opp_debug_create_one(new_opp, opp_table);
1727
1728 if (!_opp_supported_by_regulators(new_opp, opp_table)) {
1729 new_opp->available = false;
1730 dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n",
1731 __func__, new_opp->rate);
1732 }
1733
1734
1735 if (lazy_linking_pending(opp_table))
1736 return 0;
1737
1738 _required_opps_available(new_opp, opp_table->required_opp_count);
1739
1740 return 0;
1741}
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
1766 unsigned long freq, long u_volt, bool dynamic)
1767{
1768 struct dev_pm_opp *new_opp;
1769 unsigned long tol;
1770 int ret;
1771
1772 new_opp = _opp_allocate(opp_table);
1773 if (!new_opp)
1774 return -ENOMEM;
1775
1776
1777 new_opp->rate = freq;
1778 tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
1779 new_opp->supplies[0].u_volt = u_volt;
1780 new_opp->supplies[0].u_volt_min = u_volt - tol;
1781 new_opp->supplies[0].u_volt_max = u_volt + tol;
1782 new_opp->available = true;
1783 new_opp->dynamic = dynamic;
1784
1785 ret = _opp_add(dev, new_opp, opp_table, false);
1786 if (ret) {
1787
1788 if (ret == -EBUSY)
1789 ret = 0;
1790 goto free_opp;
1791 }
1792
1793
1794
1795
1796
1797 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp);
1798 return 0;
1799
1800free_opp:
1801 _opp_free(new_opp);
1802
1803 return ret;
1804}
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
1818 const u32 *versions, unsigned int count)
1819{
1820 struct opp_table *opp_table;
1821
1822 opp_table = _add_opp_table(dev, false);
1823 if (IS_ERR(opp_table))
1824 return opp_table;
1825
1826
1827 WARN_ON(!list_empty(&opp_table->opp_list));
1828
1829
1830 if (opp_table->supported_hw)
1831 return opp_table;
1832
1833 opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions),
1834 GFP_KERNEL);
1835 if (!opp_table->supported_hw) {
1836 dev_pm_opp_put_opp_table(opp_table);
1837 return ERR_PTR(-ENOMEM);
1838 }
1839
1840 opp_table->supported_hw_count = count;
1841
1842 return opp_table;
1843}
1844EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw);
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854void dev_pm_opp_put_supported_hw(struct opp_table *opp_table)
1855{
1856 if (unlikely(!opp_table))
1857 return;
1858
1859 kfree(opp_table->supported_hw);
1860 opp_table->supported_hw = NULL;
1861 opp_table->supported_hw_count = 0;
1862
1863 dev_pm_opp_put_opp_table(opp_table);
1864}
1865EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
1866
1867static void devm_pm_opp_supported_hw_release(void *data)
1868{
1869 dev_pm_opp_put_supported_hw(data);
1870}
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
1883 unsigned int count)
1884{
1885 struct opp_table *opp_table;
1886
1887 opp_table = dev_pm_opp_set_supported_hw(dev, versions, count);
1888 if (IS_ERR(opp_table))
1889 return PTR_ERR(opp_table);
1890
1891 return devm_add_action_or_reset(dev, devm_pm_opp_supported_hw_release,
1892 opp_table);
1893}
1894EXPORT_SYMBOL_GPL(devm_pm_opp_set_supported_hw);
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
1907{
1908 struct opp_table *opp_table;
1909
1910 opp_table = _add_opp_table(dev, false);
1911 if (IS_ERR(opp_table))
1912 return opp_table;
1913
1914
1915 WARN_ON(!list_empty(&opp_table->opp_list));
1916
1917
1918 if (opp_table->prop_name)
1919 return opp_table;
1920
1921 opp_table->prop_name = kstrdup(name, GFP_KERNEL);
1922 if (!opp_table->prop_name) {
1923 dev_pm_opp_put_opp_table(opp_table);
1924 return ERR_PTR(-ENOMEM);
1925 }
1926
1927 return opp_table;
1928}
1929EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name);
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939void dev_pm_opp_put_prop_name(struct opp_table *opp_table)
1940{
1941 if (unlikely(!opp_table))
1942 return;
1943
1944 kfree(opp_table->prop_name);
1945 opp_table->prop_name = NULL;
1946
1947 dev_pm_opp_put_opp_table(opp_table);
1948}
1949EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
1964 const char * const names[],
1965 unsigned int count)
1966{
1967 struct dev_pm_opp_supply *supplies;
1968 struct opp_table *opp_table;
1969 struct regulator *reg;
1970 int ret, i;
1971
1972 opp_table = _add_opp_table(dev, false);
1973 if (IS_ERR(opp_table))
1974 return opp_table;
1975
1976
1977 if (WARN_ON(!list_empty(&opp_table->opp_list))) {
1978 ret = -EBUSY;
1979 goto err;
1980 }
1981
1982
1983 if (opp_table->regulators)
1984 return opp_table;
1985
1986 opp_table->regulators = kmalloc_array(count,
1987 sizeof(*opp_table->regulators),
1988 GFP_KERNEL);
1989 if (!opp_table->regulators) {
1990 ret = -ENOMEM;
1991 goto err;
1992 }
1993
1994 for (i = 0; i < count; i++) {
1995 reg = regulator_get_optional(dev, names[i]);
1996 if (IS_ERR(reg)) {
1997 ret = PTR_ERR(reg);
1998 if (ret != -EPROBE_DEFER)
1999 dev_err(dev, "%s: no regulator (%s) found: %d\n",
2000 __func__, names[i], ret);
2001 goto free_regulators;
2002 }
2003
2004 opp_table->regulators[i] = reg;
2005 }
2006
2007 opp_table->regulator_count = count;
2008
2009 supplies = kmalloc_array(count * 2, sizeof(*supplies), GFP_KERNEL);
2010 if (!supplies) {
2011 ret = -ENOMEM;
2012 goto free_regulators;
2013 }
2014
2015 mutex_lock(&opp_table->lock);
2016 opp_table->sod_supplies = supplies;
2017 if (opp_table->set_opp_data) {
2018 opp_table->set_opp_data->old_opp.supplies = supplies;
2019 opp_table->set_opp_data->new_opp.supplies = supplies + count;
2020 }
2021 mutex_unlock(&opp_table->lock);
2022
2023 return opp_table;
2024
2025free_regulators:
2026 while (i != 0)
2027 regulator_put(opp_table->regulators[--i]);
2028
2029 kfree(opp_table->regulators);
2030 opp_table->regulators = NULL;
2031 opp_table->regulator_count = -1;
2032err:
2033 dev_pm_opp_put_opp_table(opp_table);
2034
2035 return ERR_PTR(ret);
2036}
2037EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators);
2038
2039
2040
2041
2042
2043void dev_pm_opp_put_regulators(struct opp_table *opp_table)
2044{
2045 int i;
2046
2047 if (unlikely(!opp_table))
2048 return;
2049
2050 if (!opp_table->regulators)
2051 goto put_opp_table;
2052
2053 if (opp_table->enabled) {
2054 for (i = opp_table->regulator_count - 1; i >= 0; i--)
2055 regulator_disable(opp_table->regulators[i]);
2056 }
2057
2058 for (i = opp_table->regulator_count - 1; i >= 0; i--)
2059 regulator_put(opp_table->regulators[i]);
2060
2061 mutex_lock(&opp_table->lock);
2062 if (opp_table->set_opp_data) {
2063 opp_table->set_opp_data->old_opp.supplies = NULL;
2064 opp_table->set_opp_data->new_opp.supplies = NULL;
2065 }
2066
2067 kfree(opp_table->sod_supplies);
2068 opp_table->sod_supplies = NULL;
2069 mutex_unlock(&opp_table->lock);
2070
2071 kfree(opp_table->regulators);
2072 opp_table->regulators = NULL;
2073 opp_table->regulator_count = -1;
2074
2075put_opp_table:
2076 dev_pm_opp_put_opp_table(opp_table);
2077}
2078EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators);
2079
2080static void devm_pm_opp_regulators_release(void *data)
2081{
2082 dev_pm_opp_put_regulators(data);
2083}
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095int devm_pm_opp_set_regulators(struct device *dev,
2096 const char * const names[],
2097 unsigned int count)
2098{
2099 struct opp_table *opp_table;
2100
2101 opp_table = dev_pm_opp_set_regulators(dev, names, count);
2102 if (IS_ERR(opp_table))
2103 return PTR_ERR(opp_table);
2104
2105 return devm_add_action_or_reset(dev, devm_pm_opp_regulators_release,
2106 opp_table);
2107}
2108EXPORT_SYMBOL_GPL(devm_pm_opp_set_regulators);
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
2123{
2124 struct opp_table *opp_table;
2125 int ret;
2126
2127 opp_table = _add_opp_table(dev, false);
2128 if (IS_ERR(opp_table))
2129 return opp_table;
2130
2131
2132 if (WARN_ON(!list_empty(&opp_table->opp_list))) {
2133 ret = -EBUSY;
2134 goto err;
2135 }
2136
2137
2138 if (WARN_ON(opp_table->clk)) {
2139 ret = -EBUSY;
2140 goto err;
2141 }
2142
2143
2144 opp_table->clk = clk_get(dev, name);
2145 if (IS_ERR(opp_table->clk)) {
2146 ret = PTR_ERR(opp_table->clk);
2147 if (ret != -EPROBE_DEFER) {
2148 dev_err(dev, "%s: Couldn't find clock: %d\n", __func__,
2149 ret);
2150 }
2151 goto err;
2152 }
2153
2154 return opp_table;
2155
2156err:
2157 dev_pm_opp_put_opp_table(opp_table);
2158
2159 return ERR_PTR(ret);
2160}
2161EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname);
2162
2163
2164
2165
2166
2167void dev_pm_opp_put_clkname(struct opp_table *opp_table)
2168{
2169 if (unlikely(!opp_table))
2170 return;
2171
2172 clk_put(opp_table->clk);
2173 opp_table->clk = ERR_PTR(-EINVAL);
2174
2175 dev_pm_opp_put_opp_table(opp_table);
2176}
2177EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname);
2178
2179static void devm_pm_opp_clkname_release(void *data)
2180{
2181 dev_pm_opp_put_clkname(data);
2182}
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193int devm_pm_opp_set_clkname(struct device *dev, const char *name)
2194{
2195 struct opp_table *opp_table;
2196
2197 opp_table = dev_pm_opp_set_clkname(dev, name);
2198 if (IS_ERR(opp_table))
2199 return PTR_ERR(opp_table);
2200
2201 return devm_add_action_or_reset(dev, devm_pm_opp_clkname_release,
2202 opp_table);
2203}
2204EXPORT_SYMBOL_GPL(devm_pm_opp_set_clkname);
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
2217 int (*set_opp)(struct dev_pm_set_opp_data *data))
2218{
2219 struct dev_pm_set_opp_data *data;
2220 struct opp_table *opp_table;
2221
2222 if (!set_opp)
2223 return ERR_PTR(-EINVAL);
2224
2225 opp_table = _add_opp_table(dev, false);
2226 if (IS_ERR(opp_table))
2227 return opp_table;
2228
2229
2230 if (WARN_ON(!list_empty(&opp_table->opp_list))) {
2231 dev_pm_opp_put_opp_table(opp_table);
2232 return ERR_PTR(-EBUSY);
2233 }
2234
2235
2236 if (opp_table->set_opp)
2237 return opp_table;
2238
2239 data = kzalloc(sizeof(*data), GFP_KERNEL);
2240 if (!data)
2241 return ERR_PTR(-ENOMEM);
2242
2243 mutex_lock(&opp_table->lock);
2244 opp_table->set_opp_data = data;
2245 if (opp_table->sod_supplies) {
2246 data->old_opp.supplies = opp_table->sod_supplies;
2247 data->new_opp.supplies = opp_table->sod_supplies +
2248 opp_table->regulator_count;
2249 }
2250 mutex_unlock(&opp_table->lock);
2251
2252 opp_table->set_opp = set_opp;
2253
2254 return opp_table;
2255}
2256EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper);
2257
2258
2259
2260
2261
2262
2263
2264
2265void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table)
2266{
2267 if (unlikely(!opp_table))
2268 return;
2269
2270 opp_table->set_opp = NULL;
2271
2272 mutex_lock(&opp_table->lock);
2273 kfree(opp_table->set_opp_data);
2274 opp_table->set_opp_data = NULL;
2275 mutex_unlock(&opp_table->lock);
2276
2277 dev_pm_opp_put_opp_table(opp_table);
2278}
2279EXPORT_SYMBOL_GPL(dev_pm_opp_unregister_set_opp_helper);
2280
2281static void devm_pm_opp_unregister_set_opp_helper(void *data)
2282{
2283 dev_pm_opp_unregister_set_opp_helper(data);
2284}
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295int devm_pm_opp_register_set_opp_helper(struct device *dev,
2296 int (*set_opp)(struct dev_pm_set_opp_data *data))
2297{
2298 struct opp_table *opp_table;
2299
2300 opp_table = dev_pm_opp_register_set_opp_helper(dev, set_opp);
2301 if (IS_ERR(opp_table))
2302 return PTR_ERR(opp_table);
2303
2304 return devm_add_action_or_reset(dev, devm_pm_opp_unregister_set_opp_helper,
2305 opp_table);
2306}
2307EXPORT_SYMBOL_GPL(devm_pm_opp_register_set_opp_helper);
2308
2309static void _opp_detach_genpd(struct opp_table *opp_table)
2310{
2311 int index;
2312
2313 if (!opp_table->genpd_virt_devs)
2314 return;
2315
2316 for (index = 0; index < opp_table->required_opp_count; index++) {
2317 if (!opp_table->genpd_virt_devs[index])
2318 continue;
2319
2320 dev_pm_domain_detach(opp_table->genpd_virt_devs[index], false);
2321 opp_table->genpd_virt_devs[index] = NULL;
2322 }
2323
2324 kfree(opp_table->genpd_virt_devs);
2325 opp_table->genpd_virt_devs = NULL;
2326}
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
2351 const char **names, struct device ***virt_devs)
2352{
2353 struct opp_table *opp_table;
2354 struct device *virt_dev;
2355 int index = 0, ret = -EINVAL;
2356 const char **name = names;
2357
2358 opp_table = _add_opp_table(dev, false);
2359 if (IS_ERR(opp_table))
2360 return opp_table;
2361
2362 if (opp_table->genpd_virt_devs)
2363 return opp_table;
2364
2365
2366
2367
2368
2369
2370 if (!opp_table->required_opp_count) {
2371 ret = -EPROBE_DEFER;
2372 goto put_table;
2373 }
2374
2375 mutex_lock(&opp_table->genpd_virt_dev_lock);
2376
2377 opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count,
2378 sizeof(*opp_table->genpd_virt_devs),
2379 GFP_KERNEL);
2380 if (!opp_table->genpd_virt_devs)
2381 goto unlock;
2382
2383 while (*name) {
2384 if (index >= opp_table->required_opp_count) {
2385 dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n",
2386 *name, opp_table->required_opp_count, index);
2387 goto err;
2388 }
2389
2390 virt_dev = dev_pm_domain_attach_by_name(dev, *name);
2391 if (IS_ERR(virt_dev)) {
2392 ret = PTR_ERR(virt_dev);
2393 dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret);
2394 goto err;
2395 }
2396
2397 opp_table->genpd_virt_devs[index] = virt_dev;
2398 index++;
2399 name++;
2400 }
2401
2402 if (virt_devs)
2403 *virt_devs = opp_table->genpd_virt_devs;
2404 mutex_unlock(&opp_table->genpd_virt_dev_lock);
2405
2406 return opp_table;
2407
2408err:
2409 _opp_detach_genpd(opp_table);
2410unlock:
2411 mutex_unlock(&opp_table->genpd_virt_dev_lock);
2412
2413put_table:
2414 dev_pm_opp_put_opp_table(opp_table);
2415
2416 return ERR_PTR(ret);
2417}
2418EXPORT_SYMBOL_GPL(dev_pm_opp_attach_genpd);
2419
2420
2421
2422
2423
2424
2425
2426
2427void dev_pm_opp_detach_genpd(struct opp_table *opp_table)
2428{
2429 if (unlikely(!opp_table))
2430 return;
2431
2432
2433
2434
2435
2436 mutex_lock(&opp_table->genpd_virt_dev_lock);
2437 _opp_detach_genpd(opp_table);
2438 mutex_unlock(&opp_table->genpd_virt_dev_lock);
2439
2440 dev_pm_opp_put_opp_table(opp_table);
2441}
2442EXPORT_SYMBOL_GPL(dev_pm_opp_detach_genpd);
2443
2444static void devm_pm_opp_detach_genpd(void *data)
2445{
2446 dev_pm_opp_detach_genpd(data);
2447}
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460int devm_pm_opp_attach_genpd(struct device *dev, const char **names,
2461 struct device ***virt_devs)
2462{
2463 struct opp_table *opp_table;
2464
2465 opp_table = dev_pm_opp_attach_genpd(dev, names, virt_devs);
2466 if (IS_ERR(opp_table))
2467 return PTR_ERR(opp_table);
2468
2469 return devm_add_action_or_reset(dev, devm_pm_opp_detach_genpd,
2470 opp_table);
2471}
2472EXPORT_SYMBOL_GPL(devm_pm_opp_attach_genpd);
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table,
2489 struct opp_table *dst_table,
2490 struct dev_pm_opp *src_opp)
2491{
2492 struct dev_pm_opp *opp, *dest_opp = ERR_PTR(-ENODEV);
2493 int i;
2494
2495 if (!src_table || !dst_table || !src_opp ||
2496 !src_table->required_opp_tables)
2497 return ERR_PTR(-EINVAL);
2498
2499
2500 if (lazy_linking_pending(src_table))
2501 return ERR_PTR(-EBUSY);
2502
2503 for (i = 0; i < src_table->required_opp_count; i++) {
2504 if (src_table->required_opp_tables[i] == dst_table) {
2505 mutex_lock(&src_table->lock);
2506
2507 list_for_each_entry(opp, &src_table->opp_list, node) {
2508 if (opp == src_opp) {
2509 dest_opp = opp->required_opps[i];
2510 dev_pm_opp_get(dest_opp);
2511 break;
2512 }
2513 }
2514
2515 mutex_unlock(&src_table->lock);
2516 break;
2517 }
2518 }
2519
2520 if (IS_ERR(dest_opp)) {
2521 pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__,
2522 src_table, dst_table);
2523 }
2524
2525 return dest_opp;
2526}
2527EXPORT_SYMBOL_GPL(dev_pm_opp_xlate_required_opp);
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542int dev_pm_opp_xlate_performance_state(struct opp_table *src_table,
2543 struct opp_table *dst_table,
2544 unsigned int pstate)
2545{
2546 struct dev_pm_opp *opp;
2547 int dest_pstate = -EINVAL;
2548 int i;
2549
2550
2551
2552
2553
2554
2555
2556
2557 if (!src_table || !src_table->required_opp_count)
2558 return pstate;
2559
2560
2561 if (lazy_linking_pending(src_table))
2562 return -EBUSY;
2563
2564 for (i = 0; i < src_table->required_opp_count; i++) {
2565 if (src_table->required_opp_tables[i]->np == dst_table->np)
2566 break;
2567 }
2568
2569 if (unlikely(i == src_table->required_opp_count)) {
2570 pr_err("%s: Couldn't find matching OPP table (%p: %p)\n",
2571 __func__, src_table, dst_table);
2572 return -EINVAL;
2573 }
2574
2575 mutex_lock(&src_table->lock);
2576
2577 list_for_each_entry(opp, &src_table->opp_list, node) {
2578 if (opp->pstate == pstate) {
2579 dest_pstate = opp->required_opps[i]->pstate;
2580 goto unlock;
2581 }
2582 }
2583
2584 pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table,
2585 dst_table);
2586
2587unlock:
2588 mutex_unlock(&src_table->lock);
2589
2590 return dest_pstate;
2591}
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
2611{
2612 struct opp_table *opp_table;
2613 int ret;
2614
2615 opp_table = _add_opp_table(dev, true);
2616 if (IS_ERR(opp_table))
2617 return PTR_ERR(opp_table);
2618
2619
2620 opp_table->regulator_count = 1;
2621
2622 ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
2623 if (ret)
2624 dev_pm_opp_put_opp_table(opp_table);
2625
2626 return ret;
2627}
2628EXPORT_SYMBOL_GPL(dev_pm_opp_add);
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643static int _opp_set_availability(struct device *dev, unsigned long freq,
2644 bool availability_req)
2645{
2646 struct opp_table *opp_table;
2647 struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
2648 int r = 0;
2649
2650
2651 opp_table = _find_opp_table(dev);
2652 if (IS_ERR(opp_table)) {
2653 r = PTR_ERR(opp_table);
2654 dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
2655 return r;
2656 }
2657
2658 mutex_lock(&opp_table->lock);
2659
2660
2661 list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
2662 if (tmp_opp->rate == freq) {
2663 opp = tmp_opp;
2664 break;
2665 }
2666 }
2667
2668 if (IS_ERR(opp)) {
2669 r = PTR_ERR(opp);
2670 goto unlock;
2671 }
2672
2673
2674 if (opp->available == availability_req)
2675 goto unlock;
2676
2677 opp->available = availability_req;
2678
2679 dev_pm_opp_get(opp);
2680 mutex_unlock(&opp_table->lock);
2681
2682
2683 if (availability_req)
2684 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE,
2685 opp);
2686 else
2687 blocking_notifier_call_chain(&opp_table->head,
2688 OPP_EVENT_DISABLE, opp);
2689
2690 dev_pm_opp_put(opp);
2691 goto put_table;
2692
2693unlock:
2694 mutex_unlock(&opp_table->lock);
2695put_table:
2696 dev_pm_opp_put_opp_table(opp_table);
2697 return r;
2698}
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
2713 unsigned long u_volt, unsigned long u_volt_min,
2714 unsigned long u_volt_max)
2715
2716{
2717 struct opp_table *opp_table;
2718 struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
2719 int r = 0;
2720
2721
2722 opp_table = _find_opp_table(dev);
2723 if (IS_ERR(opp_table)) {
2724 r = PTR_ERR(opp_table);
2725 dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
2726 return r;
2727 }
2728
2729 mutex_lock(&opp_table->lock);
2730
2731
2732 list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
2733 if (tmp_opp->rate == freq) {
2734 opp = tmp_opp;
2735 break;
2736 }
2737 }
2738
2739 if (IS_ERR(opp)) {
2740 r = PTR_ERR(opp);
2741 goto adjust_unlock;
2742 }
2743
2744
2745 if (opp->supplies->u_volt == u_volt)
2746 goto adjust_unlock;
2747
2748 opp->supplies->u_volt = u_volt;
2749 opp->supplies->u_volt_min = u_volt_min;
2750 opp->supplies->u_volt_max = u_volt_max;
2751
2752 dev_pm_opp_get(opp);
2753 mutex_unlock(&opp_table->lock);
2754
2755
2756 blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADJUST_VOLTAGE,
2757 opp);
2758
2759 dev_pm_opp_put(opp);
2760 goto adjust_put_table;
2761
2762adjust_unlock:
2763 mutex_unlock(&opp_table->lock);
2764adjust_put_table:
2765 dev_pm_opp_put_opp_table(opp_table);
2766 return r;
2767}
2768EXPORT_SYMBOL_GPL(dev_pm_opp_adjust_voltage);
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783int dev_pm_opp_enable(struct device *dev, unsigned long freq)
2784{
2785 return _opp_set_availability(dev, freq, true);
2786}
2787EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803int dev_pm_opp_disable(struct device *dev, unsigned long freq)
2804{
2805 return _opp_set_availability(dev, freq, false);
2806}
2807EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
2808
2809
2810
2811
2812
2813
2814
2815
2816int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
2817{
2818 struct opp_table *opp_table;
2819 int ret;
2820
2821 opp_table = _find_opp_table(dev);
2822 if (IS_ERR(opp_table))
2823 return PTR_ERR(opp_table);
2824
2825 ret = blocking_notifier_chain_register(&opp_table->head, nb);
2826
2827 dev_pm_opp_put_opp_table(opp_table);
2828
2829 return ret;
2830}
2831EXPORT_SYMBOL(dev_pm_opp_register_notifier);
2832
2833
2834
2835
2836
2837
2838
2839
2840int dev_pm_opp_unregister_notifier(struct device *dev,
2841 struct notifier_block *nb)
2842{
2843 struct opp_table *opp_table;
2844 int ret;
2845
2846 opp_table = _find_opp_table(dev);
2847 if (IS_ERR(opp_table))
2848 return PTR_ERR(opp_table);
2849
2850 ret = blocking_notifier_chain_unregister(&opp_table->head, nb);
2851
2852 dev_pm_opp_put_opp_table(opp_table);
2853
2854 return ret;
2855}
2856EXPORT_SYMBOL(dev_pm_opp_unregister_notifier);
2857
2858
2859
2860
2861
2862
2863
2864
2865void dev_pm_opp_remove_table(struct device *dev)
2866{
2867 struct opp_table *opp_table;
2868
2869
2870 opp_table = _find_opp_table(dev);
2871 if (IS_ERR(opp_table)) {
2872 int error = PTR_ERR(opp_table);
2873
2874 if (error != -ENODEV)
2875 WARN(1, "%s: opp_table: %d\n",
2876 IS_ERR_OR_NULL(dev) ?
2877 "Invalid device" : dev_name(dev),
2878 error);
2879 return;
2880 }
2881
2882
2883
2884
2885
2886 if (_opp_remove_all_static(opp_table))
2887 dev_pm_opp_put_opp_table(opp_table);
2888
2889
2890 dev_pm_opp_put_opp_table(opp_table);
2891}
2892EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902int dev_pm_opp_sync_regulators(struct device *dev)
2903{
2904 struct opp_table *opp_table;
2905 struct regulator *reg;
2906 int i, ret = 0;
2907
2908
2909 opp_table = _find_opp_table(dev);
2910 if (IS_ERR(opp_table))
2911 return 0;
2912
2913
2914 if (unlikely(!opp_table->regulators))
2915 goto put_table;
2916
2917
2918 if (!opp_table->enabled)
2919 goto put_table;
2920
2921 for (i = 0; i < opp_table->regulator_count; i++) {
2922 reg = opp_table->regulators[i];
2923 ret = regulator_sync_voltage(reg);
2924 if (ret)
2925 break;
2926 }
2927put_table:
2928
2929 dev_pm_opp_put_opp_table(opp_table);
2930
2931 return ret;
2932}
2933EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators);
2934