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13#define pr_fmt(fmt) "pinctrl core: " fmt
14
15#include <linux/kernel.h>
16#include <linux/kref.h>
17#include <linux/export.h>
18#include <linux/init.h>
19#include <linux/device.h>
20#include <linux/slab.h>
21#include <linux/err.h>
22#include <linux/list.h>
23#include <linux/debugfs.h>
24#include <linux/seq_file.h>
25#include <linux/pinctrl/consumer.h>
26#include <linux/pinctrl/pinctrl.h>
27#include <linux/pinctrl/machine.h>
28
29#ifdef CONFIG_GPIOLIB
30#include "../gpio/gpiolib.h"
31#include <asm-generic/gpio.h>
32#endif
33
34#include "core.h"
35#include "devicetree.h"
36#include "pinmux.h"
37#include "pinconf.h"
38
39
40static bool pinctrl_dummy_state;
41
42
43static DEFINE_MUTEX(pinctrl_list_mutex);
44
45
46DEFINE_MUTEX(pinctrl_maps_mutex);
47
48
49static DEFINE_MUTEX(pinctrldev_list_mutex);
50
51
52static LIST_HEAD(pinctrldev_list);
53
54
55static LIST_HEAD(pinctrl_list);
56
57
58LIST_HEAD(pinctrl_maps);
59
60
61
62
63
64
65
66
67
68
69void pinctrl_provide_dummies(void)
70{
71 pinctrl_dummy_state = true;
72}
73
74const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev)
75{
76
77 return pctldev->desc->name;
78}
79EXPORT_SYMBOL_GPL(pinctrl_dev_get_name);
80
81const char *pinctrl_dev_get_devname(struct pinctrl_dev *pctldev)
82{
83 return dev_name(pctldev->dev);
84}
85EXPORT_SYMBOL_GPL(pinctrl_dev_get_devname);
86
87void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev)
88{
89 return pctldev->driver_data;
90}
91EXPORT_SYMBOL_GPL(pinctrl_dev_get_drvdata);
92
93
94
95
96
97
98
99
100struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *devname)
101{
102 struct pinctrl_dev *pctldev;
103
104 if (!devname)
105 return NULL;
106
107 mutex_lock(&pinctrldev_list_mutex);
108
109 list_for_each_entry(pctldev, &pinctrldev_list, node) {
110 if (!strcmp(dev_name(pctldev->dev), devname)) {
111
112 mutex_unlock(&pinctrldev_list_mutex);
113 return pctldev;
114 }
115 }
116
117 mutex_unlock(&pinctrldev_list_mutex);
118
119 return NULL;
120}
121
122struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np)
123{
124 struct pinctrl_dev *pctldev;
125
126 mutex_lock(&pinctrldev_list_mutex);
127
128 list_for_each_entry(pctldev, &pinctrldev_list, node)
129 if (pctldev->dev->of_node == np) {
130 mutex_unlock(&pinctrldev_list_mutex);
131 return pctldev;
132 }
133
134 mutex_unlock(&pinctrldev_list_mutex);
135
136 return NULL;
137}
138
139
140
141
142
143
144int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name)
145{
146 unsigned i, pin;
147
148
149 for (i = 0; i < pctldev->desc->npins; i++) {
150 struct pin_desc *desc;
151
152 pin = pctldev->desc->pins[i].number;
153 desc = pin_desc_get(pctldev, pin);
154
155 if (desc && !strcmp(name, desc->name))
156 return pin;
157 }
158
159 return -EINVAL;
160}
161
162
163
164
165
166
167const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin)
168{
169 const struct pin_desc *desc;
170
171 desc = pin_desc_get(pctldev, pin);
172 if (!desc) {
173 dev_err(pctldev->dev, "failed to get pin(%d) name\n",
174 pin);
175 return NULL;
176 }
177
178 return desc->name;
179}
180EXPORT_SYMBOL_GPL(pin_get_name);
181
182
183static void pinctrl_free_pindescs(struct pinctrl_dev *pctldev,
184 const struct pinctrl_pin_desc *pins,
185 unsigned num_pins)
186{
187 int i;
188
189 for (i = 0; i < num_pins; i++) {
190 struct pin_desc *pindesc;
191
192 pindesc = radix_tree_lookup(&pctldev->pin_desc_tree,
193 pins[i].number);
194 if (pindesc) {
195 radix_tree_delete(&pctldev->pin_desc_tree,
196 pins[i].number);
197 if (pindesc->dynamic_name)
198 kfree(pindesc->name);
199 }
200 kfree(pindesc);
201 }
202}
203
204static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev,
205 const struct pinctrl_pin_desc *pin)
206{
207 struct pin_desc *pindesc;
208
209 pindesc = pin_desc_get(pctldev, pin->number);
210 if (pindesc) {
211 dev_err(pctldev->dev, "pin %d already registered\n",
212 pin->number);
213 return -EINVAL;
214 }
215
216 pindesc = kzalloc(sizeof(*pindesc), GFP_KERNEL);
217 if (!pindesc)
218 return -ENOMEM;
219
220
221 pindesc->pctldev = pctldev;
222
223
224 if (pin->name) {
225 pindesc->name = pin->name;
226 } else {
227 pindesc->name = kasprintf(GFP_KERNEL, "PIN%u", pin->number);
228 if (!pindesc->name) {
229 kfree(pindesc);
230 return -ENOMEM;
231 }
232 pindesc->dynamic_name = true;
233 }
234
235 pindesc->drv_data = pin->drv_data;
236
237 radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc);
238 pr_debug("registered pin %d (%s) on %s\n",
239 pin->number, pindesc->name, pctldev->desc->name);
240 return 0;
241}
242
243static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
244 const struct pinctrl_pin_desc *pins,
245 unsigned num_descs)
246{
247 unsigned i;
248 int ret = 0;
249
250 for (i = 0; i < num_descs; i++) {
251 ret = pinctrl_register_one_pin(pctldev, &pins[i]);
252 if (ret)
253 return ret;
254 }
255
256 return 0;
257}
258
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270
271
272static inline int gpio_to_pin(struct pinctrl_gpio_range *range,
273 unsigned int gpio)
274{
275 unsigned int offset = gpio - range->base;
276 if (range->pins)
277 return range->pins[offset];
278 else
279 return range->pin_base + offset;
280}
281
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288
289
290static struct pinctrl_gpio_range *
291pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio)
292{
293 struct pinctrl_gpio_range *range;
294
295 mutex_lock(&pctldev->mutex);
296
297 list_for_each_entry(range, &pctldev->gpio_ranges, node) {
298
299 if (gpio >= range->base &&
300 gpio < range->base + range->npins) {
301 mutex_unlock(&pctldev->mutex);
302 return range;
303 }
304 }
305 mutex_unlock(&pctldev->mutex);
306 return NULL;
307}
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320
321
322#ifdef CONFIG_GPIOLIB
323static bool pinctrl_ready_for_gpio_range(unsigned gpio)
324{
325 struct pinctrl_dev *pctldev;
326 struct pinctrl_gpio_range *range = NULL;
327 struct gpio_chip *chip = gpio_to_chip(gpio);
328
329 if (WARN(!chip, "no gpio_chip for gpio%i?", gpio))
330 return false;
331
332 mutex_lock(&pinctrldev_list_mutex);
333
334
335 list_for_each_entry(pctldev, &pinctrldev_list, node) {
336
337 mutex_lock(&pctldev->mutex);
338 list_for_each_entry(range, &pctldev->gpio_ranges, node) {
339
340 if (range->base + range->npins - 1 < chip->base ||
341 range->base > chip->base + chip->ngpio - 1)
342 continue;
343 mutex_unlock(&pctldev->mutex);
344 mutex_unlock(&pinctrldev_list_mutex);
345 return true;
346 }
347 mutex_unlock(&pctldev->mutex);
348 }
349
350 mutex_unlock(&pinctrldev_list_mutex);
351
352 return false;
353}
354#else
355static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; }
356#endif
357
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367
368
369static int pinctrl_get_device_gpio_range(unsigned gpio,
370 struct pinctrl_dev **outdev,
371 struct pinctrl_gpio_range **outrange)
372{
373 struct pinctrl_dev *pctldev;
374
375 mutex_lock(&pinctrldev_list_mutex);
376
377
378 list_for_each_entry(pctldev, &pinctrldev_list, node) {
379 struct pinctrl_gpio_range *range;
380
381 range = pinctrl_match_gpio_range(pctldev, gpio);
382 if (range) {
383 *outdev = pctldev;
384 *outrange = range;
385 mutex_unlock(&pinctrldev_list_mutex);
386 return 0;
387 }
388 }
389
390 mutex_unlock(&pinctrldev_list_mutex);
391
392 return -EPROBE_DEFER;
393}
394
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401
402
403void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
404 struct pinctrl_gpio_range *range)
405{
406 mutex_lock(&pctldev->mutex);
407 list_add_tail(&range->node, &pctldev->gpio_ranges);
408 mutex_unlock(&pctldev->mutex);
409}
410EXPORT_SYMBOL_GPL(pinctrl_add_gpio_range);
411
412void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev,
413 struct pinctrl_gpio_range *ranges,
414 unsigned nranges)
415{
416 int i;
417
418 for (i = 0; i < nranges; i++)
419 pinctrl_add_gpio_range(pctldev, &ranges[i]);
420}
421EXPORT_SYMBOL_GPL(pinctrl_add_gpio_ranges);
422
423struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
424 struct pinctrl_gpio_range *range)
425{
426 struct pinctrl_dev *pctldev;
427
428 pctldev = get_pinctrl_dev_from_devname(devname);
429
430
431
432
433
434
435 if (!pctldev) {
436 return ERR_PTR(-EPROBE_DEFER);
437 }
438 pinctrl_add_gpio_range(pctldev, range);
439
440 return pctldev;
441}
442EXPORT_SYMBOL_GPL(pinctrl_find_and_add_gpio_range);
443
444int pinctrl_get_group_pins(struct pinctrl_dev *pctldev, const char *pin_group,
445 const unsigned **pins, unsigned *num_pins)
446{
447 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
448 int gs;
449
450 if (!pctlops->get_group_pins)
451 return -EINVAL;
452
453 gs = pinctrl_get_group_selector(pctldev, pin_group);
454 if (gs < 0)
455 return gs;
456
457 return pctlops->get_group_pins(pctldev, gs, pins, num_pins);
458}
459EXPORT_SYMBOL_GPL(pinctrl_get_group_pins);
460
461struct pinctrl_gpio_range *
462pinctrl_find_gpio_range_from_pin_nolock(struct pinctrl_dev *pctldev,
463 unsigned int pin)
464{
465 struct pinctrl_gpio_range *range;
466
467
468 list_for_each_entry(range, &pctldev->gpio_ranges, node) {
469
470 if (range->pins) {
471 int a;
472 for (a = 0; a < range->npins; a++) {
473 if (range->pins[a] == pin)
474 return range;
475 }
476 } else if (pin >= range->pin_base &&
477 pin < range->pin_base + range->npins)
478 return range;
479 }
480
481 return NULL;
482}
483EXPORT_SYMBOL_GPL(pinctrl_find_gpio_range_from_pin_nolock);
484
485
486
487
488
489
490struct pinctrl_gpio_range *
491pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev,
492 unsigned int pin)
493{
494 struct pinctrl_gpio_range *range;
495
496 mutex_lock(&pctldev->mutex);
497 range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
498 mutex_unlock(&pctldev->mutex);
499
500 return range;
501}
502EXPORT_SYMBOL_GPL(pinctrl_find_gpio_range_from_pin);
503
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505
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507
508
509void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
510 struct pinctrl_gpio_range *range)
511{
512 mutex_lock(&pctldev->mutex);
513 list_del(&range->node);
514 mutex_unlock(&pctldev->mutex);
515}
516EXPORT_SYMBOL_GPL(pinctrl_remove_gpio_range);
517
518#ifdef CONFIG_GENERIC_PINCTRL_GROUPS
519
520
521
522
523
524int pinctrl_generic_get_group_count(struct pinctrl_dev *pctldev)
525{
526 return pctldev->num_groups;
527}
528EXPORT_SYMBOL_GPL(pinctrl_generic_get_group_count);
529
530
531
532
533
534
535const char *pinctrl_generic_get_group_name(struct pinctrl_dev *pctldev,
536 unsigned int selector)
537{
538 struct group_desc *group;
539
540 group = radix_tree_lookup(&pctldev->pin_group_tree,
541 selector);
542 if (!group)
543 return NULL;
544
545 return group->name;
546}
547EXPORT_SYMBOL_GPL(pinctrl_generic_get_group_name);
548
549
550
551
552
553
554
555
556int pinctrl_generic_get_group_pins(struct pinctrl_dev *pctldev,
557 unsigned int selector,
558 const unsigned int **pins,
559 unsigned int *num_pins)
560{
561 struct group_desc *group;
562
563 group = radix_tree_lookup(&pctldev->pin_group_tree,
564 selector);
565 if (!group) {
566 dev_err(pctldev->dev, "%s could not find pingroup%i\n",
567 __func__, selector);
568 return -EINVAL;
569 }
570
571 *pins = group->pins;
572 *num_pins = group->num_pins;
573
574 return 0;
575}
576EXPORT_SYMBOL_GPL(pinctrl_generic_get_group_pins);
577
578
579
580
581
582
583struct group_desc *pinctrl_generic_get_group(struct pinctrl_dev *pctldev,
584 unsigned int selector)
585{
586 struct group_desc *group;
587
588 group = radix_tree_lookup(&pctldev->pin_group_tree,
589 selector);
590 if (!group)
591 return NULL;
592
593 return group;
594}
595EXPORT_SYMBOL_GPL(pinctrl_generic_get_group);
596
597static int pinctrl_generic_group_name_to_selector(struct pinctrl_dev *pctldev,
598 const char *function)
599{
600 const struct pinctrl_ops *ops = pctldev->desc->pctlops;
601 int ngroups = ops->get_groups_count(pctldev);
602 int selector = 0;
603
604
605 while (selector < ngroups) {
606 const char *gname = ops->get_group_name(pctldev, selector);
607
608 if (gname && !strcmp(function, gname))
609 return selector;
610
611 selector++;
612 }
613
614 return -EINVAL;
615}
616
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621
622
623
624
625
626
627int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
628 int *pins, int num_pins, void *data)
629{
630 struct group_desc *group;
631 int selector;
632
633 if (!name)
634 return -EINVAL;
635
636 selector = pinctrl_generic_group_name_to_selector(pctldev, name);
637 if (selector >= 0)
638 return selector;
639
640 selector = pctldev->num_groups;
641
642 group = devm_kzalloc(pctldev->dev, sizeof(*group), GFP_KERNEL);
643 if (!group)
644 return -ENOMEM;
645
646 group->name = name;
647 group->pins = pins;
648 group->num_pins = num_pins;
649 group->data = data;
650
651 radix_tree_insert(&pctldev->pin_group_tree, selector, group);
652
653 pctldev->num_groups++;
654
655 return selector;
656}
657EXPORT_SYMBOL_GPL(pinctrl_generic_add_group);
658
659
660
661
662
663
664
665
666int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
667 unsigned int selector)
668{
669 struct group_desc *group;
670
671 group = radix_tree_lookup(&pctldev->pin_group_tree,
672 selector);
673 if (!group)
674 return -ENOENT;
675
676 radix_tree_delete(&pctldev->pin_group_tree, selector);
677 devm_kfree(pctldev->dev, group);
678
679 pctldev->num_groups--;
680
681 return 0;
682}
683EXPORT_SYMBOL_GPL(pinctrl_generic_remove_group);
684
685
686
687
688
689
690
691
692static void pinctrl_generic_free_groups(struct pinctrl_dev *pctldev)
693{
694 struct radix_tree_iter iter;
695 void __rcu **slot;
696
697 radix_tree_for_each_slot(slot, &pctldev->pin_group_tree, &iter, 0)
698 radix_tree_delete(&pctldev->pin_group_tree, iter.index);
699
700 pctldev->num_groups = 0;
701}
702
703#else
704static inline void pinctrl_generic_free_groups(struct pinctrl_dev *pctldev)
705{
706}
707#endif
708
709
710
711
712
713
714int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
715 const char *pin_group)
716{
717 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
718 unsigned ngroups = pctlops->get_groups_count(pctldev);
719 unsigned group_selector = 0;
720
721 while (group_selector < ngroups) {
722 const char *gname = pctlops->get_group_name(pctldev,
723 group_selector);
724 if (gname && !strcmp(gname, pin_group)) {
725 dev_dbg(pctldev->dev,
726 "found group selector %u for %s\n",
727 group_selector,
728 pin_group);
729 return group_selector;
730 }
731
732 group_selector++;
733 }
734
735 dev_err(pctldev->dev, "does not have pin group %s\n",
736 pin_group);
737
738 return -EINVAL;
739}
740
741bool pinctrl_gpio_can_use_line(unsigned gpio)
742{
743 struct pinctrl_dev *pctldev;
744 struct pinctrl_gpio_range *range;
745 bool result;
746 int pin;
747
748
749
750
751
752
753 if (pinctrl_get_device_gpio_range(gpio, &pctldev, &range))
754 return true;
755
756 mutex_lock(&pctldev->mutex);
757
758
759 pin = gpio_to_pin(range, gpio);
760
761 result = pinmux_can_be_used_for_gpio(pctldev, pin);
762
763 mutex_unlock(&pctldev->mutex);
764
765 return result;
766}
767EXPORT_SYMBOL_GPL(pinctrl_gpio_can_use_line);
768
769
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775
776
777int pinctrl_gpio_request(unsigned gpio)
778{
779 struct pinctrl_dev *pctldev;
780 struct pinctrl_gpio_range *range;
781 int ret;
782 int pin;
783
784 ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
785 if (ret) {
786 if (pinctrl_ready_for_gpio_range(gpio))
787 ret = 0;
788 return ret;
789 }
790
791 mutex_lock(&pctldev->mutex);
792
793
794 pin = gpio_to_pin(range, gpio);
795
796 ret = pinmux_request_gpio(pctldev, range, pin, gpio);
797
798 mutex_unlock(&pctldev->mutex);
799
800 return ret;
801}
802EXPORT_SYMBOL_GPL(pinctrl_gpio_request);
803
804
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807
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810
811
812void pinctrl_gpio_free(unsigned gpio)
813{
814 struct pinctrl_dev *pctldev;
815 struct pinctrl_gpio_range *range;
816 int ret;
817 int pin;
818
819 ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
820 if (ret) {
821 return;
822 }
823 mutex_lock(&pctldev->mutex);
824
825
826 pin = gpio_to_pin(range, gpio);
827
828 pinmux_free_gpio(pctldev, pin, range);
829
830 mutex_unlock(&pctldev->mutex);
831}
832EXPORT_SYMBOL_GPL(pinctrl_gpio_free);
833
834static int pinctrl_gpio_direction(unsigned gpio, bool input)
835{
836 struct pinctrl_dev *pctldev;
837 struct pinctrl_gpio_range *range;
838 int ret;
839 int pin;
840
841 ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
842 if (ret) {
843 return ret;
844 }
845
846 mutex_lock(&pctldev->mutex);
847
848
849 pin = gpio_to_pin(range, gpio);
850 ret = pinmux_gpio_direction(pctldev, range, pin, input);
851
852 mutex_unlock(&pctldev->mutex);
853
854 return ret;
855}
856
857
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859
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863
864
865int pinctrl_gpio_direction_input(unsigned gpio)
866{
867 return pinctrl_gpio_direction(gpio, true);
868}
869EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_input);
870
871
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876
877
878
879int pinctrl_gpio_direction_output(unsigned gpio)
880{
881 return pinctrl_gpio_direction(gpio, false);
882}
883EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_output);
884
885
886
887
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890
891
892
893
894int pinctrl_gpio_set_config(unsigned gpio, unsigned long config)
895{
896 unsigned long configs[] = { config };
897 struct pinctrl_gpio_range *range;
898 struct pinctrl_dev *pctldev;
899 int ret, pin;
900
901 ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
902 if (ret)
903 return ret;
904
905 mutex_lock(&pctldev->mutex);
906 pin = gpio_to_pin(range, gpio);
907 ret = pinconf_set_config(pctldev, pin, configs, ARRAY_SIZE(configs));
908 mutex_unlock(&pctldev->mutex);
909
910 return ret;
911}
912EXPORT_SYMBOL_GPL(pinctrl_gpio_set_config);
913
914static struct pinctrl_state *find_state(struct pinctrl *p,
915 const char *name)
916{
917 struct pinctrl_state *state;
918
919 list_for_each_entry(state, &p->states, node)
920 if (!strcmp(state->name, name))
921 return state;
922
923 return NULL;
924}
925
926static struct pinctrl_state *create_state(struct pinctrl *p,
927 const char *name)
928{
929 struct pinctrl_state *state;
930
931 state = kzalloc(sizeof(*state), GFP_KERNEL);
932 if (!state)
933 return ERR_PTR(-ENOMEM);
934
935 state->name = name;
936 INIT_LIST_HEAD(&state->settings);
937
938 list_add_tail(&state->node, &p->states);
939
940 return state;
941}
942
943static int add_setting(struct pinctrl *p, struct pinctrl_dev *pctldev,
944 const struct pinctrl_map *map)
945{
946 struct pinctrl_state *state;
947 struct pinctrl_setting *setting;
948 int ret;
949
950 state = find_state(p, map->name);
951 if (!state)
952 state = create_state(p, map->name);
953 if (IS_ERR(state))
954 return PTR_ERR(state);
955
956 if (map->type == PIN_MAP_TYPE_DUMMY_STATE)
957 return 0;
958
959 setting = kzalloc(sizeof(*setting), GFP_KERNEL);
960 if (!setting)
961 return -ENOMEM;
962
963 setting->type = map->type;
964
965 if (pctldev)
966 setting->pctldev = pctldev;
967 else
968 setting->pctldev =
969 get_pinctrl_dev_from_devname(map->ctrl_dev_name);
970 if (!setting->pctldev) {
971 kfree(setting);
972
973 if (!strcmp(map->ctrl_dev_name, map->dev_name))
974 return -ENODEV;
975
976
977
978
979 dev_info(p->dev, "unknown pinctrl device %s in map entry, deferring probe",
980 map->ctrl_dev_name);
981 return -EPROBE_DEFER;
982 }
983
984 setting->dev_name = map->dev_name;
985
986 switch (map->type) {
987 case PIN_MAP_TYPE_MUX_GROUP:
988 ret = pinmux_map_to_setting(map, setting);
989 break;
990 case PIN_MAP_TYPE_CONFIGS_PIN:
991 case PIN_MAP_TYPE_CONFIGS_GROUP:
992 ret = pinconf_map_to_setting(map, setting);
993 break;
994 default:
995 ret = -EINVAL;
996 break;
997 }
998 if (ret < 0) {
999 kfree(setting);
1000 return ret;
1001 }
1002
1003 list_add_tail(&setting->node, &state->settings);
1004
1005 return 0;
1006}
1007
1008static struct pinctrl *find_pinctrl(struct device *dev)
1009{
1010 struct pinctrl *p;
1011
1012 mutex_lock(&pinctrl_list_mutex);
1013 list_for_each_entry(p, &pinctrl_list, node)
1014 if (p->dev == dev) {
1015 mutex_unlock(&pinctrl_list_mutex);
1016 return p;
1017 }
1018
1019 mutex_unlock(&pinctrl_list_mutex);
1020 return NULL;
1021}
1022
1023static void pinctrl_free(struct pinctrl *p, bool inlist);
1024
1025static struct pinctrl *create_pinctrl(struct device *dev,
1026 struct pinctrl_dev *pctldev)
1027{
1028 struct pinctrl *p;
1029 const char *devname;
1030 struct pinctrl_maps *maps_node;
1031 int i;
1032 const struct pinctrl_map *map;
1033 int ret;
1034
1035
1036
1037
1038
1039
1040 p = kzalloc(sizeof(*p), GFP_KERNEL);
1041 if (!p)
1042 return ERR_PTR(-ENOMEM);
1043 p->dev = dev;
1044 INIT_LIST_HEAD(&p->states);
1045 INIT_LIST_HEAD(&p->dt_maps);
1046
1047 ret = pinctrl_dt_to_map(p, pctldev);
1048 if (ret < 0) {
1049 kfree(p);
1050 return ERR_PTR(ret);
1051 }
1052
1053 devname = dev_name(dev);
1054
1055 mutex_lock(&pinctrl_maps_mutex);
1056
1057 for_each_maps(maps_node, i, map) {
1058
1059 if (strcmp(map->dev_name, devname))
1060 continue;
1061
1062
1063
1064
1065
1066
1067
1068 if (pctldev &&
1069 strcmp(dev_name(pctldev->dev), map->ctrl_dev_name))
1070 continue;
1071
1072 ret = add_setting(p, pctldev, map);
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086 if (ret == -EPROBE_DEFER) {
1087 pinctrl_free(p, false);
1088 mutex_unlock(&pinctrl_maps_mutex);
1089 return ERR_PTR(ret);
1090 }
1091 }
1092 mutex_unlock(&pinctrl_maps_mutex);
1093
1094 if (ret < 0) {
1095
1096 pinctrl_free(p, false);
1097 return ERR_PTR(ret);
1098 }
1099
1100 kref_init(&p->users);
1101
1102
1103 mutex_lock(&pinctrl_list_mutex);
1104 list_add_tail(&p->node, &pinctrl_list);
1105 mutex_unlock(&pinctrl_list_mutex);
1106
1107 return p;
1108}
1109
1110
1111
1112
1113
1114struct pinctrl *pinctrl_get(struct device *dev)
1115{
1116 struct pinctrl *p;
1117
1118 if (WARN_ON(!dev))
1119 return ERR_PTR(-EINVAL);
1120
1121
1122
1123
1124
1125
1126 p = find_pinctrl(dev);
1127 if (p) {
1128 dev_dbg(dev, "obtain a copy of previously claimed pinctrl\n");
1129 kref_get(&p->users);
1130 return p;
1131 }
1132
1133 return create_pinctrl(dev, NULL);
1134}
1135EXPORT_SYMBOL_GPL(pinctrl_get);
1136
1137static void pinctrl_free_setting(bool disable_setting,
1138 struct pinctrl_setting *setting)
1139{
1140 switch (setting->type) {
1141 case PIN_MAP_TYPE_MUX_GROUP:
1142 if (disable_setting)
1143 pinmux_disable_setting(setting);
1144 pinmux_free_setting(setting);
1145 break;
1146 case PIN_MAP_TYPE_CONFIGS_PIN:
1147 case PIN_MAP_TYPE_CONFIGS_GROUP:
1148 pinconf_free_setting(setting);
1149 break;
1150 default:
1151 break;
1152 }
1153}
1154
1155static void pinctrl_free(struct pinctrl *p, bool inlist)
1156{
1157 struct pinctrl_state *state, *n1;
1158 struct pinctrl_setting *setting, *n2;
1159
1160 mutex_lock(&pinctrl_list_mutex);
1161 list_for_each_entry_safe(state, n1, &p->states, node) {
1162 list_for_each_entry_safe(setting, n2, &state->settings, node) {
1163 pinctrl_free_setting(state == p->state, setting);
1164 list_del(&setting->node);
1165 kfree(setting);
1166 }
1167 list_del(&state->node);
1168 kfree(state);
1169 }
1170
1171 pinctrl_dt_free_maps(p);
1172
1173 if (inlist)
1174 list_del(&p->node);
1175 kfree(p);
1176 mutex_unlock(&pinctrl_list_mutex);
1177}
1178
1179
1180
1181
1182
1183static void pinctrl_release(struct kref *kref)
1184{
1185 struct pinctrl *p = container_of(kref, struct pinctrl, users);
1186
1187 pinctrl_free(p, true);
1188}
1189
1190
1191
1192
1193
1194void pinctrl_put(struct pinctrl *p)
1195{
1196 kref_put(&p->users, pinctrl_release);
1197}
1198EXPORT_SYMBOL_GPL(pinctrl_put);
1199
1200
1201
1202
1203
1204
1205struct pinctrl_state *pinctrl_lookup_state(struct pinctrl *p,
1206 const char *name)
1207{
1208 struct pinctrl_state *state;
1209
1210 state = find_state(p, name);
1211 if (!state) {
1212 if (pinctrl_dummy_state) {
1213
1214 dev_dbg(p->dev, "using pinctrl dummy state (%s)\n",
1215 name);
1216 state = create_state(p, name);
1217 } else
1218 state = ERR_PTR(-ENODEV);
1219 }
1220
1221 return state;
1222}
1223EXPORT_SYMBOL_GPL(pinctrl_lookup_state);
1224
1225static void pinctrl_link_add(struct pinctrl_dev *pctldev,
1226 struct device *consumer)
1227{
1228 if (pctldev->desc->link_consumers)
1229 device_link_add(consumer, pctldev->dev,
1230 DL_FLAG_PM_RUNTIME |
1231 DL_FLAG_AUTOREMOVE_CONSUMER);
1232}
1233
1234
1235
1236
1237
1238
1239static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state)
1240{
1241 struct pinctrl_setting *setting, *setting2;
1242 struct pinctrl_state *old_state = p->state;
1243 int ret;
1244
1245 if (p->state) {
1246
1247
1248
1249
1250
1251
1252 list_for_each_entry(setting, &p->state->settings, node) {
1253 if (setting->type != PIN_MAP_TYPE_MUX_GROUP)
1254 continue;
1255 pinmux_disable_setting(setting);
1256 }
1257 }
1258
1259 p->state = NULL;
1260
1261
1262 list_for_each_entry(setting, &state->settings, node) {
1263 switch (setting->type) {
1264 case PIN_MAP_TYPE_MUX_GROUP:
1265 ret = pinmux_enable_setting(setting);
1266 break;
1267 case PIN_MAP_TYPE_CONFIGS_PIN:
1268 case PIN_MAP_TYPE_CONFIGS_GROUP:
1269 ret = pinconf_apply_setting(setting);
1270 break;
1271 default:
1272 ret = -EINVAL;
1273 break;
1274 }
1275
1276 if (ret < 0) {
1277 goto unapply_new_state;
1278 }
1279
1280
1281 if (p != setting->pctldev->p)
1282 pinctrl_link_add(setting->pctldev, p->dev);
1283 }
1284
1285 p->state = state;
1286
1287 return 0;
1288
1289unapply_new_state:
1290 dev_err(p->dev, "Error applying setting, reverse things back\n");
1291
1292 list_for_each_entry(setting2, &state->settings, node) {
1293 if (&setting2->node == &setting->node)
1294 break;
1295
1296
1297
1298
1299
1300
1301
1302 if (setting2->type == PIN_MAP_TYPE_MUX_GROUP)
1303 pinmux_disable_setting(setting2);
1304 }
1305
1306
1307 if (old_state)
1308 pinctrl_select_state(p, old_state);
1309
1310 return ret;
1311}
1312
1313
1314
1315
1316
1317
1318int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *state)
1319{
1320 if (p->state == state)
1321 return 0;
1322
1323 return pinctrl_commit_state(p, state);
1324}
1325EXPORT_SYMBOL_GPL(pinctrl_select_state);
1326
1327static void devm_pinctrl_release(struct device *dev, void *res)
1328{
1329 pinctrl_put(*(struct pinctrl **)res);
1330}
1331
1332
1333
1334
1335
1336
1337
1338
1339struct pinctrl *devm_pinctrl_get(struct device *dev)
1340{
1341 struct pinctrl **ptr, *p;
1342
1343 ptr = devres_alloc(devm_pinctrl_release, sizeof(*ptr), GFP_KERNEL);
1344 if (!ptr)
1345 return ERR_PTR(-ENOMEM);
1346
1347 p = pinctrl_get(dev);
1348 if (!IS_ERR(p)) {
1349 *ptr = p;
1350 devres_add(dev, ptr);
1351 } else {
1352 devres_free(ptr);
1353 }
1354
1355 return p;
1356}
1357EXPORT_SYMBOL_GPL(devm_pinctrl_get);
1358
1359static int devm_pinctrl_match(struct device *dev, void *res, void *data)
1360{
1361 struct pinctrl **p = res;
1362
1363 return *p == data;
1364}
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374void devm_pinctrl_put(struct pinctrl *p)
1375{
1376 WARN_ON(devres_release(p->dev, devm_pinctrl_release,
1377 devm_pinctrl_match, p));
1378}
1379EXPORT_SYMBOL_GPL(devm_pinctrl_put);
1380
1381
1382
1383
1384
1385
1386
1387
1388int pinctrl_register_mappings(const struct pinctrl_map *maps,
1389 unsigned num_maps)
1390{
1391 int i, ret;
1392 struct pinctrl_maps *maps_node;
1393
1394 pr_debug("add %u pinctrl maps\n", num_maps);
1395
1396
1397 for (i = 0; i < num_maps; i++) {
1398 if (!maps[i].dev_name) {
1399 pr_err("failed to register map %s (%d): no device given\n",
1400 maps[i].name, i);
1401 return -EINVAL;
1402 }
1403
1404 if (!maps[i].name) {
1405 pr_err("failed to register map %d: no map name given\n",
1406 i);
1407 return -EINVAL;
1408 }
1409
1410 if (maps[i].type != PIN_MAP_TYPE_DUMMY_STATE &&
1411 !maps[i].ctrl_dev_name) {
1412 pr_err("failed to register map %s (%d): no pin control device given\n",
1413 maps[i].name, i);
1414 return -EINVAL;
1415 }
1416
1417 switch (maps[i].type) {
1418 case PIN_MAP_TYPE_DUMMY_STATE:
1419 break;
1420 case PIN_MAP_TYPE_MUX_GROUP:
1421 ret = pinmux_validate_map(&maps[i], i);
1422 if (ret < 0)
1423 return ret;
1424 break;
1425 case PIN_MAP_TYPE_CONFIGS_PIN:
1426 case PIN_MAP_TYPE_CONFIGS_GROUP:
1427 ret = pinconf_validate_map(&maps[i], i);
1428 if (ret < 0)
1429 return ret;
1430 break;
1431 default:
1432 pr_err("failed to register map %s (%d): invalid type given\n",
1433 maps[i].name, i);
1434 return -EINVAL;
1435 }
1436 }
1437
1438 maps_node = kzalloc(sizeof(*maps_node), GFP_KERNEL);
1439 if (!maps_node)
1440 return -ENOMEM;
1441
1442 maps_node->maps = maps;
1443 maps_node->num_maps = num_maps;
1444
1445 mutex_lock(&pinctrl_maps_mutex);
1446 list_add_tail(&maps_node->node, &pinctrl_maps);
1447 mutex_unlock(&pinctrl_maps_mutex);
1448
1449 return 0;
1450}
1451EXPORT_SYMBOL_GPL(pinctrl_register_mappings);
1452
1453
1454
1455
1456
1457
1458void pinctrl_unregister_mappings(const struct pinctrl_map *map)
1459{
1460 struct pinctrl_maps *maps_node;
1461
1462 mutex_lock(&pinctrl_maps_mutex);
1463 list_for_each_entry(maps_node, &pinctrl_maps, node) {
1464 if (maps_node->maps == map) {
1465 list_del(&maps_node->node);
1466 kfree(maps_node);
1467 mutex_unlock(&pinctrl_maps_mutex);
1468 return;
1469 }
1470 }
1471 mutex_unlock(&pinctrl_maps_mutex);
1472}
1473EXPORT_SYMBOL_GPL(pinctrl_unregister_mappings);
1474
1475
1476
1477
1478
1479int pinctrl_force_sleep(struct pinctrl_dev *pctldev)
1480{
1481 if (!IS_ERR(pctldev->p) && !IS_ERR(pctldev->hog_sleep))
1482 return pinctrl_commit_state(pctldev->p, pctldev->hog_sleep);
1483 return 0;
1484}
1485EXPORT_SYMBOL_GPL(pinctrl_force_sleep);
1486
1487
1488
1489
1490
1491int pinctrl_force_default(struct pinctrl_dev *pctldev)
1492{
1493 if (!IS_ERR(pctldev->p) && !IS_ERR(pctldev->hog_default))
1494 return pinctrl_commit_state(pctldev->p, pctldev->hog_default);
1495 return 0;
1496}
1497EXPORT_SYMBOL_GPL(pinctrl_force_default);
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507int pinctrl_init_done(struct device *dev)
1508{
1509 struct dev_pin_info *pins = dev->pins;
1510 int ret;
1511
1512 if (!pins)
1513 return 0;
1514
1515 if (IS_ERR(pins->init_state))
1516 return 0;
1517
1518 if (pins->p->state != pins->init_state)
1519 return 0;
1520
1521 if (IS_ERR(pins->default_state))
1522 return 0;
1523
1524 ret = pinctrl_select_state(pins->p, pins->default_state);
1525 if (ret)
1526 dev_err(dev, "failed to activate default pinctrl state\n");
1527
1528 return ret;
1529}
1530
1531static int pinctrl_select_bound_state(struct device *dev,
1532 struct pinctrl_state *state)
1533{
1534 struct dev_pin_info *pins = dev->pins;
1535 int ret;
1536
1537 if (IS_ERR(state))
1538 return 0;
1539 ret = pinctrl_select_state(pins->p, state);
1540 if (ret)
1541 dev_err(dev, "failed to activate pinctrl state %s\n",
1542 state->name);
1543 return ret;
1544}
1545
1546
1547
1548
1549
1550int pinctrl_select_default_state(struct device *dev)
1551{
1552 if (!dev->pins)
1553 return 0;
1554
1555 return pinctrl_select_bound_state(dev, dev->pins->default_state);
1556}
1557EXPORT_SYMBOL_GPL(pinctrl_select_default_state);
1558
1559#ifdef CONFIG_PM
1560
1561
1562
1563
1564
1565int pinctrl_pm_select_default_state(struct device *dev)
1566{
1567 return pinctrl_select_default_state(dev);
1568}
1569EXPORT_SYMBOL_GPL(pinctrl_pm_select_default_state);
1570
1571
1572
1573
1574
1575int pinctrl_pm_select_sleep_state(struct device *dev)
1576{
1577 if (!dev->pins)
1578 return 0;
1579
1580 return pinctrl_select_bound_state(dev, dev->pins->sleep_state);
1581}
1582EXPORT_SYMBOL_GPL(pinctrl_pm_select_sleep_state);
1583
1584
1585
1586
1587
1588int pinctrl_pm_select_idle_state(struct device *dev)
1589{
1590 if (!dev->pins)
1591 return 0;
1592
1593 return pinctrl_select_bound_state(dev, dev->pins->idle_state);
1594}
1595EXPORT_SYMBOL_GPL(pinctrl_pm_select_idle_state);
1596#endif
1597
1598#ifdef CONFIG_DEBUG_FS
1599
1600static int pinctrl_pins_show(struct seq_file *s, void *what)
1601{
1602 struct pinctrl_dev *pctldev = s->private;
1603 const struct pinctrl_ops *ops = pctldev->desc->pctlops;
1604 unsigned i, pin;
1605#ifdef CONFIG_GPIOLIB
1606 struct pinctrl_gpio_range *range;
1607 unsigned int gpio_num;
1608 struct gpio_chip *chip;
1609#endif
1610
1611 seq_printf(s, "registered pins: %d\n", pctldev->desc->npins);
1612
1613 mutex_lock(&pctldev->mutex);
1614
1615
1616 for (i = 0; i < pctldev->desc->npins; i++) {
1617 struct pin_desc *desc;
1618
1619 pin = pctldev->desc->pins[i].number;
1620 desc = pin_desc_get(pctldev, pin);
1621
1622 if (!desc)
1623 continue;
1624
1625 seq_printf(s, "pin %d (%s) ", pin, desc->name);
1626
1627#ifdef CONFIG_GPIOLIB
1628 gpio_num = 0;
1629 list_for_each_entry(range, &pctldev->gpio_ranges, node) {
1630 if ((pin >= range->pin_base) &&
1631 (pin < (range->pin_base + range->npins))) {
1632 gpio_num = range->base + (pin - range->pin_base);
1633 break;
1634 }
1635 }
1636 chip = gpio_to_chip(gpio_num);
1637 if (chip && chip->gpiodev && chip->gpiodev->base)
1638 seq_printf(s, "%u:%s ", gpio_num -
1639 chip->gpiodev->base, chip->label);
1640 else
1641 seq_puts(s, "0:? ");
1642#endif
1643
1644
1645 if (ops->pin_dbg_show)
1646 ops->pin_dbg_show(pctldev, s, pin);
1647
1648 seq_puts(s, "\n");
1649 }
1650
1651 mutex_unlock(&pctldev->mutex);
1652
1653 return 0;
1654}
1655DEFINE_SHOW_ATTRIBUTE(pinctrl_pins);
1656
1657static int pinctrl_groups_show(struct seq_file *s, void *what)
1658{
1659 struct pinctrl_dev *pctldev = s->private;
1660 const struct pinctrl_ops *ops = pctldev->desc->pctlops;
1661 unsigned ngroups, selector = 0;
1662
1663 mutex_lock(&pctldev->mutex);
1664
1665 ngroups = ops->get_groups_count(pctldev);
1666
1667 seq_puts(s, "registered pin groups:\n");
1668 while (selector < ngroups) {
1669 const unsigned *pins = NULL;
1670 unsigned num_pins = 0;
1671 const char *gname = ops->get_group_name(pctldev, selector);
1672 const char *pname;
1673 int ret = 0;
1674 int i;
1675
1676 if (ops->get_group_pins)
1677 ret = ops->get_group_pins(pctldev, selector,
1678 &pins, &num_pins);
1679 if (ret)
1680 seq_printf(s, "%s [ERROR GETTING PINS]\n",
1681 gname);
1682 else {
1683 seq_printf(s, "group: %s\n", gname);
1684 for (i = 0; i < num_pins; i++) {
1685 pname = pin_get_name(pctldev, pins[i]);
1686 if (WARN_ON(!pname)) {
1687 mutex_unlock(&pctldev->mutex);
1688 return -EINVAL;
1689 }
1690 seq_printf(s, "pin %d (%s)\n", pins[i], pname);
1691 }
1692 seq_puts(s, "\n");
1693 }
1694 selector++;
1695 }
1696
1697 mutex_unlock(&pctldev->mutex);
1698
1699 return 0;
1700}
1701DEFINE_SHOW_ATTRIBUTE(pinctrl_groups);
1702
1703static int pinctrl_gpioranges_show(struct seq_file *s, void *what)
1704{
1705 struct pinctrl_dev *pctldev = s->private;
1706 struct pinctrl_gpio_range *range;
1707
1708 seq_puts(s, "GPIO ranges handled:\n");
1709
1710 mutex_lock(&pctldev->mutex);
1711
1712
1713 list_for_each_entry(range, &pctldev->gpio_ranges, node) {
1714 if (range->pins) {
1715 int a;
1716 seq_printf(s, "%u: %s GPIOS [%u - %u] PINS {",
1717 range->id, range->name,
1718 range->base, (range->base + range->npins - 1));
1719 for (a = 0; a < range->npins - 1; a++)
1720 seq_printf(s, "%u, ", range->pins[a]);
1721 seq_printf(s, "%u}\n", range->pins[a]);
1722 }
1723 else
1724 seq_printf(s, "%u: %s GPIOS [%u - %u] PINS [%u - %u]\n",
1725 range->id, range->name,
1726 range->base, (range->base + range->npins - 1),
1727 range->pin_base,
1728 (range->pin_base + range->npins - 1));
1729 }
1730
1731 mutex_unlock(&pctldev->mutex);
1732
1733 return 0;
1734}
1735DEFINE_SHOW_ATTRIBUTE(pinctrl_gpioranges);
1736
1737static int pinctrl_devices_show(struct seq_file *s, void *what)
1738{
1739 struct pinctrl_dev *pctldev;
1740
1741 seq_puts(s, "name [pinmux] [pinconf]\n");
1742
1743 mutex_lock(&pinctrldev_list_mutex);
1744
1745 list_for_each_entry(pctldev, &pinctrldev_list, node) {
1746 seq_printf(s, "%s ", pctldev->desc->name);
1747 if (pctldev->desc->pmxops)
1748 seq_puts(s, "yes ");
1749 else
1750 seq_puts(s, "no ");
1751 if (pctldev->desc->confops)
1752 seq_puts(s, "yes");
1753 else
1754 seq_puts(s, "no");
1755 seq_puts(s, "\n");
1756 }
1757
1758 mutex_unlock(&pinctrldev_list_mutex);
1759
1760 return 0;
1761}
1762DEFINE_SHOW_ATTRIBUTE(pinctrl_devices);
1763
1764static inline const char *map_type(enum pinctrl_map_type type)
1765{
1766 static const char * const names[] = {
1767 "INVALID",
1768 "DUMMY_STATE",
1769 "MUX_GROUP",
1770 "CONFIGS_PIN",
1771 "CONFIGS_GROUP",
1772 };
1773
1774 if (type >= ARRAY_SIZE(names))
1775 return "UNKNOWN";
1776
1777 return names[type];
1778}
1779
1780static int pinctrl_maps_show(struct seq_file *s, void *what)
1781{
1782 struct pinctrl_maps *maps_node;
1783 int i;
1784 const struct pinctrl_map *map;
1785
1786 seq_puts(s, "Pinctrl maps:\n");
1787
1788 mutex_lock(&pinctrl_maps_mutex);
1789 for_each_maps(maps_node, i, map) {
1790 seq_printf(s, "device %s\nstate %s\ntype %s (%d)\n",
1791 map->dev_name, map->name, map_type(map->type),
1792 map->type);
1793
1794 if (map->type != PIN_MAP_TYPE_DUMMY_STATE)
1795 seq_printf(s, "controlling device %s\n",
1796 map->ctrl_dev_name);
1797
1798 switch (map->type) {
1799 case PIN_MAP_TYPE_MUX_GROUP:
1800 pinmux_show_map(s, map);
1801 break;
1802 case PIN_MAP_TYPE_CONFIGS_PIN:
1803 case PIN_MAP_TYPE_CONFIGS_GROUP:
1804 pinconf_show_map(s, map);
1805 break;
1806 default:
1807 break;
1808 }
1809
1810 seq_putc(s, '\n');
1811 }
1812 mutex_unlock(&pinctrl_maps_mutex);
1813
1814 return 0;
1815}
1816DEFINE_SHOW_ATTRIBUTE(pinctrl_maps);
1817
1818static int pinctrl_show(struct seq_file *s, void *what)
1819{
1820 struct pinctrl *p;
1821 struct pinctrl_state *state;
1822 struct pinctrl_setting *setting;
1823
1824 seq_puts(s, "Requested pin control handlers their pinmux maps:\n");
1825
1826 mutex_lock(&pinctrl_list_mutex);
1827
1828 list_for_each_entry(p, &pinctrl_list, node) {
1829 seq_printf(s, "device: %s current state: %s\n",
1830 dev_name(p->dev),
1831 p->state ? p->state->name : "none");
1832
1833 list_for_each_entry(state, &p->states, node) {
1834 seq_printf(s, " state: %s\n", state->name);
1835
1836 list_for_each_entry(setting, &state->settings, node) {
1837 struct pinctrl_dev *pctldev = setting->pctldev;
1838
1839 seq_printf(s, " type: %s controller %s ",
1840 map_type(setting->type),
1841 pinctrl_dev_get_name(pctldev));
1842
1843 switch (setting->type) {
1844 case PIN_MAP_TYPE_MUX_GROUP:
1845 pinmux_show_setting(s, setting);
1846 break;
1847 case PIN_MAP_TYPE_CONFIGS_PIN:
1848 case PIN_MAP_TYPE_CONFIGS_GROUP:
1849 pinconf_show_setting(s, setting);
1850 break;
1851 default:
1852 break;
1853 }
1854 }
1855 }
1856 }
1857
1858 mutex_unlock(&pinctrl_list_mutex);
1859
1860 return 0;
1861}
1862DEFINE_SHOW_ATTRIBUTE(pinctrl);
1863
1864static struct dentry *debugfs_root;
1865
1866static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
1867{
1868 struct dentry *device_root;
1869 const char *debugfs_name;
1870
1871 if (pctldev->desc->name &&
1872 strcmp(dev_name(pctldev->dev), pctldev->desc->name)) {
1873 debugfs_name = devm_kasprintf(pctldev->dev, GFP_KERNEL,
1874 "%s-%s", dev_name(pctldev->dev),
1875 pctldev->desc->name);
1876 if (!debugfs_name) {
1877 pr_warn("failed to determine debugfs dir name for %s\n",
1878 dev_name(pctldev->dev));
1879 return;
1880 }
1881 } else {
1882 debugfs_name = dev_name(pctldev->dev);
1883 }
1884
1885 device_root = debugfs_create_dir(debugfs_name, debugfs_root);
1886 pctldev->device_root = device_root;
1887
1888 if (IS_ERR(device_root) || !device_root) {
1889 pr_warn("failed to create debugfs directory for %s\n",
1890 dev_name(pctldev->dev));
1891 return;
1892 }
1893 debugfs_create_file("pins", S_IFREG | S_IRUGO,
1894 device_root, pctldev, &pinctrl_pins_fops);
1895 debugfs_create_file("pingroups", S_IFREG | S_IRUGO,
1896 device_root, pctldev, &pinctrl_groups_fops);
1897 debugfs_create_file("gpio-ranges", S_IFREG | S_IRUGO,
1898 device_root, pctldev, &pinctrl_gpioranges_fops);
1899 if (pctldev->desc->pmxops)
1900 pinmux_init_device_debugfs(device_root, pctldev);
1901 if (pctldev->desc->confops)
1902 pinconf_init_device_debugfs(device_root, pctldev);
1903}
1904
1905static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
1906{
1907 debugfs_remove_recursive(pctldev->device_root);
1908}
1909
1910static void pinctrl_init_debugfs(void)
1911{
1912 debugfs_root = debugfs_create_dir("pinctrl", NULL);
1913 if (IS_ERR(debugfs_root) || !debugfs_root) {
1914 pr_warn("failed to create debugfs directory\n");
1915 debugfs_root = NULL;
1916 return;
1917 }
1918
1919 debugfs_create_file("pinctrl-devices", S_IFREG | S_IRUGO,
1920 debugfs_root, NULL, &pinctrl_devices_fops);
1921 debugfs_create_file("pinctrl-maps", S_IFREG | S_IRUGO,
1922 debugfs_root, NULL, &pinctrl_maps_fops);
1923 debugfs_create_file("pinctrl-handles", S_IFREG | S_IRUGO,
1924 debugfs_root, NULL, &pinctrl_fops);
1925}
1926
1927#else
1928
1929static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
1930{
1931}
1932
1933static void pinctrl_init_debugfs(void)
1934{
1935}
1936
1937static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
1938{
1939}
1940
1941#endif
1942
1943static int pinctrl_check_ops(struct pinctrl_dev *pctldev)
1944{
1945 const struct pinctrl_ops *ops = pctldev->desc->pctlops;
1946
1947 if (!ops ||
1948 !ops->get_groups_count ||
1949 !ops->get_group_name)
1950 return -EINVAL;
1951
1952 return 0;
1953}
1954
1955
1956
1957
1958
1959
1960
1961static struct pinctrl_dev *
1962pinctrl_init_controller(struct pinctrl_desc *pctldesc, struct device *dev,
1963 void *driver_data)
1964{
1965 struct pinctrl_dev *pctldev;
1966 int ret;
1967
1968 if (!pctldesc)
1969 return ERR_PTR(-EINVAL);
1970 if (!pctldesc->name)
1971 return ERR_PTR(-EINVAL);
1972
1973 pctldev = kzalloc(sizeof(*pctldev), GFP_KERNEL);
1974 if (!pctldev)
1975 return ERR_PTR(-ENOMEM);
1976
1977
1978 pctldev->owner = pctldesc->owner;
1979 pctldev->desc = pctldesc;
1980 pctldev->driver_data = driver_data;
1981 INIT_RADIX_TREE(&pctldev->pin_desc_tree, GFP_KERNEL);
1982#ifdef CONFIG_GENERIC_PINCTRL_GROUPS
1983 INIT_RADIX_TREE(&pctldev->pin_group_tree, GFP_KERNEL);
1984#endif
1985#ifdef CONFIG_GENERIC_PINMUX_FUNCTIONS
1986 INIT_RADIX_TREE(&pctldev->pin_function_tree, GFP_KERNEL);
1987#endif
1988 INIT_LIST_HEAD(&pctldev->gpio_ranges);
1989 INIT_LIST_HEAD(&pctldev->node);
1990 pctldev->dev = dev;
1991 mutex_init(&pctldev->mutex);
1992
1993
1994 ret = pinctrl_check_ops(pctldev);
1995 if (ret) {
1996 dev_err(dev, "pinctrl ops lacks necessary functions\n");
1997 goto out_err;
1998 }
1999
2000
2001 if (pctldesc->pmxops) {
2002 ret = pinmux_check_ops(pctldev);
2003 if (ret)
2004 goto out_err;
2005 }
2006
2007
2008 if (pctldesc->confops) {
2009 ret = pinconf_check_ops(pctldev);
2010 if (ret)
2011 goto out_err;
2012 }
2013
2014
2015 dev_dbg(dev, "try to register %d pins ...\n", pctldesc->npins);
2016 ret = pinctrl_register_pins(pctldev, pctldesc->pins, pctldesc->npins);
2017 if (ret) {
2018 dev_err(dev, "error during pin registration\n");
2019 pinctrl_free_pindescs(pctldev, pctldesc->pins,
2020 pctldesc->npins);
2021 goto out_err;
2022 }
2023
2024 return pctldev;
2025
2026out_err:
2027 mutex_destroy(&pctldev->mutex);
2028 kfree(pctldev);
2029 return ERR_PTR(ret);
2030}
2031
2032static int pinctrl_claim_hogs(struct pinctrl_dev *pctldev)
2033{
2034 pctldev->p = create_pinctrl(pctldev->dev, pctldev);
2035 if (PTR_ERR(pctldev->p) == -ENODEV) {
2036 dev_dbg(pctldev->dev, "no hogs found\n");
2037
2038 return 0;
2039 }
2040
2041 if (IS_ERR(pctldev->p)) {
2042 dev_err(pctldev->dev, "error claiming hogs: %li\n",
2043 PTR_ERR(pctldev->p));
2044
2045 return PTR_ERR(pctldev->p);
2046 }
2047
2048 pctldev->hog_default =
2049 pinctrl_lookup_state(pctldev->p, PINCTRL_STATE_DEFAULT);
2050 if (IS_ERR(pctldev->hog_default)) {
2051 dev_dbg(pctldev->dev,
2052 "failed to lookup the default state\n");
2053 } else {
2054 if (pinctrl_select_state(pctldev->p,
2055 pctldev->hog_default))
2056 dev_err(pctldev->dev,
2057 "failed to select default state\n");
2058 }
2059
2060 pctldev->hog_sleep =
2061 pinctrl_lookup_state(pctldev->p,
2062 PINCTRL_STATE_SLEEP);
2063 if (IS_ERR(pctldev->hog_sleep))
2064 dev_dbg(pctldev->dev,
2065 "failed to lookup the sleep state\n");
2066
2067 return 0;
2068}
2069
2070int pinctrl_enable(struct pinctrl_dev *pctldev)
2071{
2072 int error;
2073
2074 error = pinctrl_claim_hogs(pctldev);
2075 if (error) {
2076 dev_err(pctldev->dev, "could not claim hogs: %i\n",
2077 error);
2078 mutex_destroy(&pctldev->mutex);
2079 kfree(pctldev);
2080
2081 return error;
2082 }
2083
2084 mutex_lock(&pinctrldev_list_mutex);
2085 list_add_tail(&pctldev->node, &pinctrldev_list);
2086 mutex_unlock(&pinctrldev_list_mutex);
2087
2088 pinctrl_init_device_debugfs(pctldev);
2089
2090 return 0;
2091}
2092EXPORT_SYMBOL_GPL(pinctrl_enable);
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
2106 struct device *dev, void *driver_data)
2107{
2108 struct pinctrl_dev *pctldev;
2109 int error;
2110
2111 pctldev = pinctrl_init_controller(pctldesc, dev, driver_data);
2112 if (IS_ERR(pctldev))
2113 return pctldev;
2114
2115 error = pinctrl_enable(pctldev);
2116 if (error)
2117 return ERR_PTR(error);
2118
2119 return pctldev;
2120
2121}
2122EXPORT_SYMBOL_GPL(pinctrl_register);
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134int pinctrl_register_and_init(struct pinctrl_desc *pctldesc,
2135 struct device *dev, void *driver_data,
2136 struct pinctrl_dev **pctldev)
2137{
2138 struct pinctrl_dev *p;
2139
2140 p = pinctrl_init_controller(pctldesc, dev, driver_data);
2141 if (IS_ERR(p))
2142 return PTR_ERR(p);
2143
2144
2145
2146
2147
2148
2149
2150 *pctldev = p;
2151
2152 return 0;
2153}
2154EXPORT_SYMBOL_GPL(pinctrl_register_and_init);
2155
2156
2157
2158
2159
2160
2161
2162void pinctrl_unregister(struct pinctrl_dev *pctldev)
2163{
2164 struct pinctrl_gpio_range *range, *n;
2165
2166 if (!pctldev)
2167 return;
2168
2169 mutex_lock(&pctldev->mutex);
2170 pinctrl_remove_device_debugfs(pctldev);
2171 mutex_unlock(&pctldev->mutex);
2172
2173 if (!IS_ERR_OR_NULL(pctldev->p))
2174 pinctrl_put(pctldev->p);
2175
2176 mutex_lock(&pinctrldev_list_mutex);
2177 mutex_lock(&pctldev->mutex);
2178
2179 list_del(&pctldev->node);
2180 pinmux_generic_free_functions(pctldev);
2181 pinctrl_generic_free_groups(pctldev);
2182
2183 pinctrl_free_pindescs(pctldev, pctldev->desc->pins,
2184 pctldev->desc->npins);
2185
2186 list_for_each_entry_safe(range, n, &pctldev->gpio_ranges, node)
2187 list_del(&range->node);
2188
2189 mutex_unlock(&pctldev->mutex);
2190 mutex_destroy(&pctldev->mutex);
2191 kfree(pctldev);
2192 mutex_unlock(&pinctrldev_list_mutex);
2193}
2194EXPORT_SYMBOL_GPL(pinctrl_unregister);
2195
2196static void devm_pinctrl_dev_release(struct device *dev, void *res)
2197{
2198 struct pinctrl_dev *pctldev = *(struct pinctrl_dev **)res;
2199
2200 pinctrl_unregister(pctldev);
2201}
2202
2203static int devm_pinctrl_dev_match(struct device *dev, void *res, void *data)
2204{
2205 struct pctldev **r = res;
2206
2207 if (WARN_ON(!r || !*r))
2208 return 0;
2209
2210 return *r == data;
2211}
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224struct pinctrl_dev *devm_pinctrl_register(struct device *dev,
2225 struct pinctrl_desc *pctldesc,
2226 void *driver_data)
2227{
2228 struct pinctrl_dev **ptr, *pctldev;
2229
2230 ptr = devres_alloc(devm_pinctrl_dev_release, sizeof(*ptr), GFP_KERNEL);
2231 if (!ptr)
2232 return ERR_PTR(-ENOMEM);
2233
2234 pctldev = pinctrl_register(pctldesc, dev, driver_data);
2235 if (IS_ERR(pctldev)) {
2236 devres_free(ptr);
2237 return pctldev;
2238 }
2239
2240 *ptr = pctldev;
2241 devres_add(dev, ptr);
2242
2243 return pctldev;
2244}
2245EXPORT_SYMBOL_GPL(devm_pinctrl_register);
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258int devm_pinctrl_register_and_init(struct device *dev,
2259 struct pinctrl_desc *pctldesc,
2260 void *driver_data,
2261 struct pinctrl_dev **pctldev)
2262{
2263 struct pinctrl_dev **ptr;
2264 int error;
2265
2266 ptr = devres_alloc(devm_pinctrl_dev_release, sizeof(*ptr), GFP_KERNEL);
2267 if (!ptr)
2268 return -ENOMEM;
2269
2270 error = pinctrl_register_and_init(pctldesc, dev, driver_data, pctldev);
2271 if (error) {
2272 devres_free(ptr);
2273 return error;
2274 }
2275
2276 *ptr = *pctldev;
2277 devres_add(dev, ptr);
2278
2279 return 0;
2280}
2281EXPORT_SYMBOL_GPL(devm_pinctrl_register_and_init);
2282
2283
2284
2285
2286
2287
2288void devm_pinctrl_unregister(struct device *dev, struct pinctrl_dev *pctldev)
2289{
2290 WARN_ON(devres_release(dev, devm_pinctrl_dev_release,
2291 devm_pinctrl_dev_match, pctldev));
2292}
2293EXPORT_SYMBOL_GPL(devm_pinctrl_unregister);
2294
2295static int __init pinctrl_init(void)
2296{
2297 pr_info("initialized pinctrl subsystem\n");
2298 pinctrl_init_debugfs();
2299 return 0;
2300}
2301
2302
2303core_initcall(pinctrl_init);
2304