1
2
3
4
5
6
7
8
9
10
11
12
13#include <linux/device.h>
14#include <linux/slab.h>
15#include <linux/export.h>
16#include <linux/mutex.h>
17#include <linux/err.h>
18#include <linux/of.h>
19#include <linux/rbtree.h>
20#include <linux/sched.h>
21#include <linux/delay.h>
22#include <linux/log2.h>
23
24#define CREATE_TRACE_POINTS
25#include "trace.h"
26
27#include "internal.h"
28
29
30
31
32
33
34
35#undef LOG_DEVICE
36
37static int _regmap_update_bits(struct regmap *map, unsigned int reg,
38 unsigned int mask, unsigned int val,
39 bool *change, bool force_write);
40
41static int _regmap_bus_reg_read(void *context, unsigned int reg,
42 unsigned int *val);
43static int _regmap_bus_read(void *context, unsigned int reg,
44 unsigned int *val);
45static int _regmap_bus_formatted_write(void *context, unsigned int reg,
46 unsigned int val);
47static int _regmap_bus_reg_write(void *context, unsigned int reg,
48 unsigned int val);
49static int _regmap_bus_raw_write(void *context, unsigned int reg,
50 unsigned int val);
51
52bool regmap_reg_in_ranges(unsigned int reg,
53 const struct regmap_range *ranges,
54 unsigned int nranges)
55{
56 const struct regmap_range *r;
57 int i;
58
59 for (i = 0, r = ranges; i < nranges; i++, r++)
60 if (regmap_reg_in_range(reg, r))
61 return true;
62 return false;
63}
64EXPORT_SYMBOL_GPL(regmap_reg_in_ranges);
65
66bool regmap_check_range_table(struct regmap *map, unsigned int reg,
67 const struct regmap_access_table *table)
68{
69
70 if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges))
71 return false;
72
73
74 if (!table->n_yes_ranges)
75 return true;
76
77 return regmap_reg_in_ranges(reg, table->yes_ranges,
78 table->n_yes_ranges);
79}
80EXPORT_SYMBOL_GPL(regmap_check_range_table);
81
82bool regmap_writeable(struct regmap *map, unsigned int reg)
83{
84 if (map->max_register && reg > map->max_register)
85 return false;
86
87 if (map->writeable_reg)
88 return map->writeable_reg(map->dev, reg);
89
90 if (map->wr_table)
91 return regmap_check_range_table(map, reg, map->wr_table);
92
93 return true;
94}
95
96bool regmap_cached(struct regmap *map, unsigned int reg)
97{
98 int ret;
99 unsigned int val;
100
101 if (map->cache == REGCACHE_NONE)
102 return false;
103
104 if (!map->cache_ops)
105 return false;
106
107 if (map->max_register && reg > map->max_register)
108 return false;
109
110 map->lock(map->lock_arg);
111 ret = regcache_read(map, reg, &val);
112 map->unlock(map->lock_arg);
113 if (ret)
114 return false;
115
116 return true;
117}
118
119bool regmap_readable(struct regmap *map, unsigned int reg)
120{
121 if (!map->reg_read)
122 return false;
123
124 if (map->max_register && reg > map->max_register)
125 return false;
126
127 if (map->format.format_write)
128 return false;
129
130 if (map->readable_reg)
131 return map->readable_reg(map->dev, reg);
132
133 if (map->rd_table)
134 return regmap_check_range_table(map, reg, map->rd_table);
135
136 return true;
137}
138
139bool regmap_volatile(struct regmap *map, unsigned int reg)
140{
141 if (!map->format.format_write && !regmap_readable(map, reg))
142 return false;
143
144 if (map->volatile_reg)
145 return map->volatile_reg(map->dev, reg);
146
147 if (map->volatile_table)
148 return regmap_check_range_table(map, reg, map->volatile_table);
149
150 if (map->cache_ops)
151 return false;
152 else
153 return true;
154}
155
156bool regmap_precious(struct regmap *map, unsigned int reg)
157{
158 if (!regmap_readable(map, reg))
159 return false;
160
161 if (map->precious_reg)
162 return map->precious_reg(map->dev, reg);
163
164 if (map->precious_table)
165 return regmap_check_range_table(map, reg, map->precious_table);
166
167 return false;
168}
169
170static bool regmap_volatile_range(struct regmap *map, unsigned int reg,
171 size_t num)
172{
173 unsigned int i;
174
175 for (i = 0; i < num; i++)
176 if (!regmap_volatile(map, reg + i))
177 return false;
178
179 return true;
180}
181
182static void regmap_format_2_6_write(struct regmap *map,
183 unsigned int reg, unsigned int val)
184{
185 u8 *out = map->work_buf;
186
187 *out = (reg << 6) | val;
188}
189
190static void regmap_format_4_12_write(struct regmap *map,
191 unsigned int reg, unsigned int val)
192{
193 __be16 *out = map->work_buf;
194 *out = cpu_to_be16((reg << 12) | val);
195}
196
197static void regmap_format_7_9_write(struct regmap *map,
198 unsigned int reg, unsigned int val)
199{
200 __be16 *out = map->work_buf;
201 *out = cpu_to_be16((reg << 9) | val);
202}
203
204static void regmap_format_10_14_write(struct regmap *map,
205 unsigned int reg, unsigned int val)
206{
207 u8 *out = map->work_buf;
208
209 out[2] = val;
210 out[1] = (val >> 8) | (reg << 6);
211 out[0] = reg >> 2;
212}
213
214static void regmap_format_8(void *buf, unsigned int val, unsigned int shift)
215{
216 u8 *b = buf;
217
218 b[0] = val << shift;
219}
220
221static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift)
222{
223 __be16 *b = buf;
224
225 b[0] = cpu_to_be16(val << shift);
226}
227
228static void regmap_format_16_le(void *buf, unsigned int val, unsigned int shift)
229{
230 __le16 *b = buf;
231
232 b[0] = cpu_to_le16(val << shift);
233}
234
235static void regmap_format_16_native(void *buf, unsigned int val,
236 unsigned int shift)
237{
238 *(u16 *)buf = val << shift;
239}
240
241static void regmap_format_24(void *buf, unsigned int val, unsigned int shift)
242{
243 u8 *b = buf;
244
245 val <<= shift;
246
247 b[0] = val >> 16;
248 b[1] = val >> 8;
249 b[2] = val;
250}
251
252static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift)
253{
254 __be32 *b = buf;
255
256 b[0] = cpu_to_be32(val << shift);
257}
258
259static void regmap_format_32_le(void *buf, unsigned int val, unsigned int shift)
260{
261 __le32 *b = buf;
262
263 b[0] = cpu_to_le32(val << shift);
264}
265
266static void regmap_format_32_native(void *buf, unsigned int val,
267 unsigned int shift)
268{
269 *(u32 *)buf = val << shift;
270}
271
272#ifdef CONFIG_64BIT
273static void regmap_format_64_be(void *buf, unsigned int val, unsigned int shift)
274{
275 __be64 *b = buf;
276
277 b[0] = cpu_to_be64((u64)val << shift);
278}
279
280static void regmap_format_64_le(void *buf, unsigned int val, unsigned int shift)
281{
282 __le64 *b = buf;
283
284 b[0] = cpu_to_le64((u64)val << shift);
285}
286
287static void regmap_format_64_native(void *buf, unsigned int val,
288 unsigned int shift)
289{
290 *(u64 *)buf = (u64)val << shift;
291}
292#endif
293
294static void regmap_parse_inplace_noop(void *buf)
295{
296}
297
298static unsigned int regmap_parse_8(const void *buf)
299{
300 const u8 *b = buf;
301
302 return b[0];
303}
304
305static unsigned int regmap_parse_16_be(const void *buf)
306{
307 const __be16 *b = buf;
308
309 return be16_to_cpu(b[0]);
310}
311
312static unsigned int regmap_parse_16_le(const void *buf)
313{
314 const __le16 *b = buf;
315
316 return le16_to_cpu(b[0]);
317}
318
319static void regmap_parse_16_be_inplace(void *buf)
320{
321 __be16 *b = buf;
322
323 b[0] = be16_to_cpu(b[0]);
324}
325
326static void regmap_parse_16_le_inplace(void *buf)
327{
328 __le16 *b = buf;
329
330 b[0] = le16_to_cpu(b[0]);
331}
332
333static unsigned int regmap_parse_16_native(const void *buf)
334{
335 return *(u16 *)buf;
336}
337
338static unsigned int regmap_parse_24(const void *buf)
339{
340 const u8 *b = buf;
341 unsigned int ret = b[2];
342 ret |= ((unsigned int)b[1]) << 8;
343 ret |= ((unsigned int)b[0]) << 16;
344
345 return ret;
346}
347
348static unsigned int regmap_parse_32_be(const void *buf)
349{
350 const __be32 *b = buf;
351
352 return be32_to_cpu(b[0]);
353}
354
355static unsigned int regmap_parse_32_le(const void *buf)
356{
357 const __le32 *b = buf;
358
359 return le32_to_cpu(b[0]);
360}
361
362static void regmap_parse_32_be_inplace(void *buf)
363{
364 __be32 *b = buf;
365
366 b[0] = be32_to_cpu(b[0]);
367}
368
369static void regmap_parse_32_le_inplace(void *buf)
370{
371 __le32 *b = buf;
372
373 b[0] = le32_to_cpu(b[0]);
374}
375
376static unsigned int regmap_parse_32_native(const void *buf)
377{
378 return *(u32 *)buf;
379}
380
381#ifdef CONFIG_64BIT
382static unsigned int regmap_parse_64_be(const void *buf)
383{
384 const __be64 *b = buf;
385
386 return be64_to_cpu(b[0]);
387}
388
389static unsigned int regmap_parse_64_le(const void *buf)
390{
391 const __le64 *b = buf;
392
393 return le64_to_cpu(b[0]);
394}
395
396static void regmap_parse_64_be_inplace(void *buf)
397{
398 __be64 *b = buf;
399
400 b[0] = be64_to_cpu(b[0]);
401}
402
403static void regmap_parse_64_le_inplace(void *buf)
404{
405 __le64 *b = buf;
406
407 b[0] = le64_to_cpu(b[0]);
408}
409
410static unsigned int regmap_parse_64_native(const void *buf)
411{
412 return *(u64 *)buf;
413}
414#endif
415
416static void regmap_lock_mutex(void *__map)
417{
418 struct regmap *map = __map;
419 mutex_lock(&map->mutex);
420}
421
422static void regmap_unlock_mutex(void *__map)
423{
424 struct regmap *map = __map;
425 mutex_unlock(&map->mutex);
426}
427
428static void regmap_lock_spinlock(void *__map)
429__acquires(&map->spinlock)
430{
431 struct regmap *map = __map;
432 unsigned long flags;
433
434 spin_lock_irqsave(&map->spinlock, flags);
435 map->spinlock_flags = flags;
436}
437
438static void regmap_unlock_spinlock(void *__map)
439__releases(&map->spinlock)
440{
441 struct regmap *map = __map;
442 spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags);
443}
444
445static void dev_get_regmap_release(struct device *dev, void *res)
446{
447
448
449
450
451
452}
453
454static bool _regmap_range_add(struct regmap *map,
455 struct regmap_range_node *data)
456{
457 struct rb_root *root = &map->range_tree;
458 struct rb_node **new = &(root->rb_node), *parent = NULL;
459
460 while (*new) {
461 struct regmap_range_node *this =
462 rb_entry(*new, struct regmap_range_node, node);
463
464 parent = *new;
465 if (data->range_max < this->range_min)
466 new = &((*new)->rb_left);
467 else if (data->range_min > this->range_max)
468 new = &((*new)->rb_right);
469 else
470 return false;
471 }
472
473 rb_link_node(&data->node, parent, new);
474 rb_insert_color(&data->node, root);
475
476 return true;
477}
478
479static struct regmap_range_node *_regmap_range_lookup(struct regmap *map,
480 unsigned int reg)
481{
482 struct rb_node *node = map->range_tree.rb_node;
483
484 while (node) {
485 struct regmap_range_node *this =
486 rb_entry(node, struct regmap_range_node, node);
487
488 if (reg < this->range_min)
489 node = node->rb_left;
490 else if (reg > this->range_max)
491 node = node->rb_right;
492 else
493 return this;
494 }
495
496 return NULL;
497}
498
499static void regmap_range_exit(struct regmap *map)
500{
501 struct rb_node *next;
502 struct regmap_range_node *range_node;
503
504 next = rb_first(&map->range_tree);
505 while (next) {
506 range_node = rb_entry(next, struct regmap_range_node, node);
507 next = rb_next(&range_node->node);
508 rb_erase(&range_node->node, &map->range_tree);
509 kfree(range_node);
510 }
511
512 kfree(map->selector_work_buf);
513}
514
515int regmap_attach_dev(struct device *dev, struct regmap *map,
516 const struct regmap_config *config)
517{
518 struct regmap **m;
519
520 map->dev = dev;
521
522 regmap_debugfs_init(map, config->name);
523
524
525 m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL);
526 if (!m) {
527 regmap_debugfs_exit(map);
528 return -ENOMEM;
529 }
530 *m = map;
531 devres_add(dev, m);
532
533 return 0;
534}
535EXPORT_SYMBOL_GPL(regmap_attach_dev);
536
537static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus,
538 const struct regmap_config *config)
539{
540 enum regmap_endian endian;
541
542
543 endian = config->reg_format_endian;
544
545
546 if (endian != REGMAP_ENDIAN_DEFAULT)
547 return endian;
548
549
550 if (bus && bus->reg_format_endian_default)
551 endian = bus->reg_format_endian_default;
552
553
554 if (endian != REGMAP_ENDIAN_DEFAULT)
555 return endian;
556
557
558 return REGMAP_ENDIAN_BIG;
559}
560
561enum regmap_endian regmap_get_val_endian(struct device *dev,
562 const struct regmap_bus *bus,
563 const struct regmap_config *config)
564{
565 struct device_node *np;
566 enum regmap_endian endian;
567
568
569 endian = config->val_format_endian;
570
571
572 if (endian != REGMAP_ENDIAN_DEFAULT)
573 return endian;
574
575
576 if (dev && dev->of_node) {
577 np = dev->of_node;
578
579
580 if (of_property_read_bool(np, "big-endian"))
581 endian = REGMAP_ENDIAN_BIG;
582 else if (of_property_read_bool(np, "little-endian"))
583 endian = REGMAP_ENDIAN_LITTLE;
584 else if (of_property_read_bool(np, "native-endian"))
585 endian = REGMAP_ENDIAN_NATIVE;
586
587
588 if (endian != REGMAP_ENDIAN_DEFAULT)
589 return endian;
590 }
591
592
593 if (bus && bus->val_format_endian_default)
594 endian = bus->val_format_endian_default;
595
596
597 if (endian != REGMAP_ENDIAN_DEFAULT)
598 return endian;
599
600
601 return REGMAP_ENDIAN_BIG;
602}
603EXPORT_SYMBOL_GPL(regmap_get_val_endian);
604
605struct regmap *__regmap_init(struct device *dev,
606 const struct regmap_bus *bus,
607 void *bus_context,
608 const struct regmap_config *config,
609 struct lock_class_key *lock_key,
610 const char *lock_name)
611{
612 struct regmap *map;
613 int ret = -EINVAL;
614 enum regmap_endian reg_endian, val_endian;
615 int i, j;
616
617 if (!config)
618 goto err;
619
620 map = kzalloc(sizeof(*map), GFP_KERNEL);
621 if (map == NULL) {
622 ret = -ENOMEM;
623 goto err;
624 }
625
626 if (config->lock && config->unlock) {
627 map->lock = config->lock;
628 map->unlock = config->unlock;
629 map->lock_arg = config->lock_arg;
630 } else {
631 if ((bus && bus->fast_io) ||
632 config->fast_io) {
633 spin_lock_init(&map->spinlock);
634 map->lock = regmap_lock_spinlock;
635 map->unlock = regmap_unlock_spinlock;
636 lockdep_set_class_and_name(&map->spinlock,
637 lock_key, lock_name);
638 } else {
639 mutex_init(&map->mutex);
640 map->lock = regmap_lock_mutex;
641 map->unlock = regmap_unlock_mutex;
642 lockdep_set_class_and_name(&map->mutex,
643 lock_key, lock_name);
644 }
645 map->lock_arg = map;
646 }
647
648
649
650
651
652 if ((bus && bus->fast_io) || config->fast_io)
653 map->alloc_flags = GFP_ATOMIC;
654 else
655 map->alloc_flags = GFP_KERNEL;
656
657 map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
658 map->format.pad_bytes = config->pad_bits / 8;
659 map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8);
660 map->format.buf_size = DIV_ROUND_UP(config->reg_bits +
661 config->val_bits + config->pad_bits, 8);
662 map->reg_shift = config->pad_bits % 8;
663 if (config->reg_stride)
664 map->reg_stride = config->reg_stride;
665 else
666 map->reg_stride = 1;
667 if (is_power_of_2(map->reg_stride))
668 map->reg_stride_order = ilog2(map->reg_stride);
669 else
670 map->reg_stride_order = -1;
671 map->use_single_read = config->use_single_rw || !bus || !bus->read;
672 map->use_single_write = config->use_single_rw || !bus || !bus->write;
673 map->can_multi_write = config->can_multi_write && bus && bus->write;
674 if (bus) {
675 map->max_raw_read = bus->max_raw_read;
676 map->max_raw_write = bus->max_raw_write;
677 }
678 map->dev = dev;
679 map->bus = bus;
680 map->bus_context = bus_context;
681 map->max_register = config->max_register;
682 map->wr_table = config->wr_table;
683 map->rd_table = config->rd_table;
684 map->volatile_table = config->volatile_table;
685 map->precious_table = config->precious_table;
686 map->writeable_reg = config->writeable_reg;
687 map->readable_reg = config->readable_reg;
688 map->volatile_reg = config->volatile_reg;
689 map->precious_reg = config->precious_reg;
690 map->cache_type = config->cache_type;
691 map->name = config->name;
692
693 spin_lock_init(&map->async_lock);
694 INIT_LIST_HEAD(&map->async_list);
695 INIT_LIST_HEAD(&map->async_free);
696 init_waitqueue_head(&map->async_waitq);
697
698 if (config->read_flag_mask || config->write_flag_mask) {
699 map->read_flag_mask = config->read_flag_mask;
700 map->write_flag_mask = config->write_flag_mask;
701 } else if (bus) {
702 map->read_flag_mask = bus->read_flag_mask;
703 }
704
705 if (!bus) {
706 map->reg_read = config->reg_read;
707 map->reg_write = config->reg_write;
708
709 map->defer_caching = false;
710 goto skip_format_initialization;
711 } else if (!bus->read || !bus->write) {
712 map->reg_read = _regmap_bus_reg_read;
713 map->reg_write = _regmap_bus_reg_write;
714
715 map->defer_caching = false;
716 goto skip_format_initialization;
717 } else {
718 map->reg_read = _regmap_bus_read;
719 map->reg_update_bits = bus->reg_update_bits;
720 }
721
722 reg_endian = regmap_get_reg_endian(bus, config);
723 val_endian = regmap_get_val_endian(dev, bus, config);
724
725 switch (config->reg_bits + map->reg_shift) {
726 case 2:
727 switch (config->val_bits) {
728 case 6:
729 map->format.format_write = regmap_format_2_6_write;
730 break;
731 default:
732 goto err_map;
733 }
734 break;
735
736 case 4:
737 switch (config->val_bits) {
738 case 12:
739 map->format.format_write = regmap_format_4_12_write;
740 break;
741 default:
742 goto err_map;
743 }
744 break;
745
746 case 7:
747 switch (config->val_bits) {
748 case 9:
749 map->format.format_write = regmap_format_7_9_write;
750 break;
751 default:
752 goto err_map;
753 }
754 break;
755
756 case 10:
757 switch (config->val_bits) {
758 case 14:
759 map->format.format_write = regmap_format_10_14_write;
760 break;
761 default:
762 goto err_map;
763 }
764 break;
765
766 case 8:
767 map->format.format_reg = regmap_format_8;
768 break;
769
770 case 16:
771 switch (reg_endian) {
772 case REGMAP_ENDIAN_BIG:
773 map->format.format_reg = regmap_format_16_be;
774 break;
775 case REGMAP_ENDIAN_LITTLE:
776 map->format.format_reg = regmap_format_16_le;
777 break;
778 case REGMAP_ENDIAN_NATIVE:
779 map->format.format_reg = regmap_format_16_native;
780 break;
781 default:
782 goto err_map;
783 }
784 break;
785
786 case 24:
787 if (reg_endian != REGMAP_ENDIAN_BIG)
788 goto err_map;
789 map->format.format_reg = regmap_format_24;
790 break;
791
792 case 32:
793 switch (reg_endian) {
794 case REGMAP_ENDIAN_BIG:
795 map->format.format_reg = regmap_format_32_be;
796 break;
797 case REGMAP_ENDIAN_LITTLE:
798 map->format.format_reg = regmap_format_32_le;
799 break;
800 case REGMAP_ENDIAN_NATIVE:
801 map->format.format_reg = regmap_format_32_native;
802 break;
803 default:
804 goto err_map;
805 }
806 break;
807
808#ifdef CONFIG_64BIT
809 case 64:
810 switch (reg_endian) {
811 case REGMAP_ENDIAN_BIG:
812 map->format.format_reg = regmap_format_64_be;
813 break;
814 case REGMAP_ENDIAN_LITTLE:
815 map->format.format_reg = regmap_format_64_le;
816 break;
817 case REGMAP_ENDIAN_NATIVE:
818 map->format.format_reg = regmap_format_64_native;
819 break;
820 default:
821 goto err_map;
822 }
823 break;
824#endif
825
826 default:
827 goto err_map;
828 }
829
830 if (val_endian == REGMAP_ENDIAN_NATIVE)
831 map->format.parse_inplace = regmap_parse_inplace_noop;
832
833 switch (config->val_bits) {
834 case 8:
835 map->format.format_val = regmap_format_8;
836 map->format.parse_val = regmap_parse_8;
837 map->format.parse_inplace = regmap_parse_inplace_noop;
838 break;
839 case 16:
840 switch (val_endian) {
841 case REGMAP_ENDIAN_BIG:
842 map->format.format_val = regmap_format_16_be;
843 map->format.parse_val = regmap_parse_16_be;
844 map->format.parse_inplace = regmap_parse_16_be_inplace;
845 break;
846 case REGMAP_ENDIAN_LITTLE:
847 map->format.format_val = regmap_format_16_le;
848 map->format.parse_val = regmap_parse_16_le;
849 map->format.parse_inplace = regmap_parse_16_le_inplace;
850 break;
851 case REGMAP_ENDIAN_NATIVE:
852 map->format.format_val = regmap_format_16_native;
853 map->format.parse_val = regmap_parse_16_native;
854 break;
855 default:
856 goto err_map;
857 }
858 break;
859 case 24:
860 if (val_endian != REGMAP_ENDIAN_BIG)
861 goto err_map;
862 map->format.format_val = regmap_format_24;
863 map->format.parse_val = regmap_parse_24;
864 break;
865 case 32:
866 switch (val_endian) {
867 case REGMAP_ENDIAN_BIG:
868 map->format.format_val = regmap_format_32_be;
869 map->format.parse_val = regmap_parse_32_be;
870 map->format.parse_inplace = regmap_parse_32_be_inplace;
871 break;
872 case REGMAP_ENDIAN_LITTLE:
873 map->format.format_val = regmap_format_32_le;
874 map->format.parse_val = regmap_parse_32_le;
875 map->format.parse_inplace = regmap_parse_32_le_inplace;
876 break;
877 case REGMAP_ENDIAN_NATIVE:
878 map->format.format_val = regmap_format_32_native;
879 map->format.parse_val = regmap_parse_32_native;
880 break;
881 default:
882 goto err_map;
883 }
884 break;
885#ifdef CONFIG_64BIT
886 case 64:
887 switch (val_endian) {
888 case REGMAP_ENDIAN_BIG:
889 map->format.format_val = regmap_format_64_be;
890 map->format.parse_val = regmap_parse_64_be;
891 map->format.parse_inplace = regmap_parse_64_be_inplace;
892 break;
893 case REGMAP_ENDIAN_LITTLE:
894 map->format.format_val = regmap_format_64_le;
895 map->format.parse_val = regmap_parse_64_le;
896 map->format.parse_inplace = regmap_parse_64_le_inplace;
897 break;
898 case REGMAP_ENDIAN_NATIVE:
899 map->format.format_val = regmap_format_64_native;
900 map->format.parse_val = regmap_parse_64_native;
901 break;
902 default:
903 goto err_map;
904 }
905 break;
906#endif
907 }
908
909 if (map->format.format_write) {
910 if ((reg_endian != REGMAP_ENDIAN_BIG) ||
911 (val_endian != REGMAP_ENDIAN_BIG))
912 goto err_map;
913 map->use_single_write = true;
914 }
915
916 if (!map->format.format_write &&
917 !(map->format.format_reg && map->format.format_val))
918 goto err_map;
919
920 map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL);
921 if (map->work_buf == NULL) {
922 ret = -ENOMEM;
923 goto err_map;
924 }
925
926 if (map->format.format_write) {
927 map->defer_caching = false;
928 map->reg_write = _regmap_bus_formatted_write;
929 } else if (map->format.format_val) {
930 map->defer_caching = true;
931 map->reg_write = _regmap_bus_raw_write;
932 }
933
934skip_format_initialization:
935
936 map->range_tree = RB_ROOT;
937 for (i = 0; i < config->num_ranges; i++) {
938 const struct regmap_range_cfg *range_cfg = &config->ranges[i];
939 struct regmap_range_node *new;
940
941
942 if (range_cfg->range_max < range_cfg->range_min) {
943 dev_err(map->dev, "Invalid range %d: %d < %d\n", i,
944 range_cfg->range_max, range_cfg->range_min);
945 goto err_range;
946 }
947
948 if (range_cfg->range_max > map->max_register) {
949 dev_err(map->dev, "Invalid range %d: %d > %d\n", i,
950 range_cfg->range_max, map->max_register);
951 goto err_range;
952 }
953
954 if (range_cfg->selector_reg > map->max_register) {
955 dev_err(map->dev,
956 "Invalid range %d: selector out of map\n", i);
957 goto err_range;
958 }
959
960 if (range_cfg->window_len == 0) {
961 dev_err(map->dev, "Invalid range %d: window_len 0\n",
962 i);
963 goto err_range;
964 }
965
966
967
968 for (j = 0; j < config->num_ranges; j++) {
969 unsigned sel_reg = config->ranges[j].selector_reg;
970 unsigned win_min = config->ranges[j].window_start;
971 unsigned win_max = win_min +
972 config->ranges[j].window_len - 1;
973
974
975 if (j == i)
976 continue;
977
978 if (range_cfg->range_min <= sel_reg &&
979 sel_reg <= range_cfg->range_max) {
980 dev_err(map->dev,
981 "Range %d: selector for %d in window\n",
982 i, j);
983 goto err_range;
984 }
985
986 if (!(win_max < range_cfg->range_min ||
987 win_min > range_cfg->range_max)) {
988 dev_err(map->dev,
989 "Range %d: window for %d in window\n",
990 i, j);
991 goto err_range;
992 }
993 }
994
995 new = kzalloc(sizeof(*new), GFP_KERNEL);
996 if (new == NULL) {
997 ret = -ENOMEM;
998 goto err_range;
999 }
1000
1001 new->map = map;
1002 new->name = range_cfg->name;
1003 new->range_min = range_cfg->range_min;
1004 new->range_max = range_cfg->range_max;
1005 new->selector_reg = range_cfg->selector_reg;
1006 new->selector_mask = range_cfg->selector_mask;
1007 new->selector_shift = range_cfg->selector_shift;
1008 new->window_start = range_cfg->window_start;
1009 new->window_len = range_cfg->window_len;
1010
1011 if (!_regmap_range_add(map, new)) {
1012 dev_err(map->dev, "Failed to add range %d\n", i);
1013 kfree(new);
1014 goto err_range;
1015 }
1016
1017 if (map->selector_work_buf == NULL) {
1018 map->selector_work_buf =
1019 kzalloc(map->format.buf_size, GFP_KERNEL);
1020 if (map->selector_work_buf == NULL) {
1021 ret = -ENOMEM;
1022 goto err_range;
1023 }
1024 }
1025 }
1026
1027 ret = regcache_init(map, config);
1028 if (ret != 0)
1029 goto err_range;
1030
1031 if (dev) {
1032 ret = regmap_attach_dev(dev, map, config);
1033 if (ret != 0)
1034 goto err_regcache;
1035 }
1036
1037 return map;
1038
1039err_regcache:
1040 regcache_exit(map);
1041err_range:
1042 regmap_range_exit(map);
1043 kfree(map->work_buf);
1044err_map:
1045 kfree(map);
1046err:
1047 return ERR_PTR(ret);
1048}
1049EXPORT_SYMBOL_GPL(__regmap_init);
1050
1051static void devm_regmap_release(struct device *dev, void *res)
1052{
1053 regmap_exit(*(struct regmap **)res);
1054}
1055
1056struct regmap *__devm_regmap_init(struct device *dev,
1057 const struct regmap_bus *bus,
1058 void *bus_context,
1059 const struct regmap_config *config,
1060 struct lock_class_key *lock_key,
1061 const char *lock_name)
1062{
1063 struct regmap **ptr, *regmap;
1064
1065 ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL);
1066 if (!ptr)
1067 return ERR_PTR(-ENOMEM);
1068
1069 regmap = __regmap_init(dev, bus, bus_context, config,
1070 lock_key, lock_name);
1071 if (!IS_ERR(regmap)) {
1072 *ptr = regmap;
1073 devres_add(dev, ptr);
1074 } else {
1075 devres_free(ptr);
1076 }
1077
1078 return regmap;
1079}
1080EXPORT_SYMBOL_GPL(__devm_regmap_init);
1081
1082static void regmap_field_init(struct regmap_field *rm_field,
1083 struct regmap *regmap, struct reg_field reg_field)
1084{
1085 rm_field->regmap = regmap;
1086 rm_field->reg = reg_field.reg;
1087 rm_field->shift = reg_field.lsb;
1088 rm_field->mask = GENMASK(reg_field.msb, reg_field.lsb);
1089 rm_field->id_size = reg_field.id_size;
1090 rm_field->id_offset = reg_field.id_offset;
1091}
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104struct regmap_field *devm_regmap_field_alloc(struct device *dev,
1105 struct regmap *regmap, struct reg_field reg_field)
1106{
1107 struct regmap_field *rm_field = devm_kzalloc(dev,
1108 sizeof(*rm_field), GFP_KERNEL);
1109 if (!rm_field)
1110 return ERR_PTR(-ENOMEM);
1111
1112 regmap_field_init(rm_field, regmap, reg_field);
1113
1114 return rm_field;
1115
1116}
1117EXPORT_SYMBOL_GPL(devm_regmap_field_alloc);
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130void devm_regmap_field_free(struct device *dev,
1131 struct regmap_field *field)
1132{
1133 devm_kfree(dev, field);
1134}
1135EXPORT_SYMBOL_GPL(devm_regmap_field_free);
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147struct regmap_field *regmap_field_alloc(struct regmap *regmap,
1148 struct reg_field reg_field)
1149{
1150 struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL);
1151
1152 if (!rm_field)
1153 return ERR_PTR(-ENOMEM);
1154
1155 regmap_field_init(rm_field, regmap, reg_field);
1156
1157 return rm_field;
1158}
1159EXPORT_SYMBOL_GPL(regmap_field_alloc);
1160
1161
1162
1163
1164
1165
1166
1167void regmap_field_free(struct regmap_field *field)
1168{
1169 kfree(field);
1170}
1171EXPORT_SYMBOL_GPL(regmap_field_free);
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
1188{
1189 regcache_exit(map);
1190 regmap_debugfs_exit(map);
1191
1192 map->max_register = config->max_register;
1193 map->writeable_reg = config->writeable_reg;
1194 map->readable_reg = config->readable_reg;
1195 map->volatile_reg = config->volatile_reg;
1196 map->precious_reg = config->precious_reg;
1197 map->cache_type = config->cache_type;
1198
1199 regmap_debugfs_init(map, config->name);
1200
1201 map->cache_bypass = false;
1202 map->cache_only = false;
1203
1204 return regcache_init(map, config);
1205}
1206EXPORT_SYMBOL_GPL(regmap_reinit_cache);
1207
1208
1209
1210
1211
1212
1213void regmap_exit(struct regmap *map)
1214{
1215 struct regmap_async *async;
1216
1217 regcache_exit(map);
1218 regmap_debugfs_exit(map);
1219 regmap_range_exit(map);
1220 if (map->bus && map->bus->free_context)
1221 map->bus->free_context(map->bus_context);
1222 kfree(map->work_buf);
1223 while (!list_empty(&map->async_free)) {
1224 async = list_first_entry_or_null(&map->async_free,
1225 struct regmap_async,
1226 list);
1227 list_del(&async->list);
1228 kfree(async->work_buf);
1229 kfree(async);
1230 }
1231 kfree(map);
1232}
1233EXPORT_SYMBOL_GPL(regmap_exit);
1234
1235static int dev_get_regmap_match(struct device *dev, void *res, void *data)
1236{
1237 struct regmap **r = res;
1238 if (!r || !*r) {
1239 WARN_ON(!r || !*r);
1240 return 0;
1241 }
1242
1243
1244 if (data)
1245 return (*r)->name == data;
1246 else
1247 return 1;
1248}
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262struct regmap *dev_get_regmap(struct device *dev, const char *name)
1263{
1264 struct regmap **r = devres_find(dev, dev_get_regmap_release,
1265 dev_get_regmap_match, (void *)name);
1266
1267 if (!r)
1268 return NULL;
1269 return *r;
1270}
1271EXPORT_SYMBOL_GPL(dev_get_regmap);
1272
1273
1274
1275
1276
1277
1278
1279
1280struct device *regmap_get_device(struct regmap *map)
1281{
1282 return map->dev;
1283}
1284EXPORT_SYMBOL_GPL(regmap_get_device);
1285
1286static int _regmap_select_page(struct regmap *map, unsigned int *reg,
1287 struct regmap_range_node *range,
1288 unsigned int val_num)
1289{
1290 void *orig_work_buf;
1291 unsigned int win_offset;
1292 unsigned int win_page;
1293 bool page_chg;
1294 int ret;
1295
1296 win_offset = (*reg - range->range_min) % range->window_len;
1297 win_page = (*reg - range->range_min) / range->window_len;
1298
1299 if (val_num > 1) {
1300
1301 if (*reg + val_num - 1 > range->range_max)
1302 return -EINVAL;
1303
1304
1305 if (val_num > range->window_len - win_offset)
1306 return -EINVAL;
1307 }
1308
1309
1310
1311
1312 if (val_num > 1 ||
1313 range->window_start + win_offset != range->selector_reg) {
1314
1315 orig_work_buf = map->work_buf;
1316 map->work_buf = map->selector_work_buf;
1317
1318 ret = _regmap_update_bits(map, range->selector_reg,
1319 range->selector_mask,
1320 win_page << range->selector_shift,
1321 &page_chg, false);
1322
1323 map->work_buf = orig_work_buf;
1324
1325 if (ret != 0)
1326 return ret;
1327 }
1328
1329 *reg = range->window_start + win_offset;
1330
1331 return 0;
1332}
1333
1334static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes,
1335 unsigned long mask)
1336{
1337 u8 *buf;
1338 int i;
1339
1340 if (!mask || !map->work_buf)
1341 return;
1342
1343 buf = map->work_buf;
1344
1345 for (i = 0; i < max_bytes; i++)
1346 buf[i] |= (mask >> (8 * i)) & 0xff;
1347}
1348
1349int _regmap_raw_write(struct regmap *map, unsigned int reg,
1350 const void *val, size_t val_len)
1351{
1352 struct regmap_range_node *range;
1353 unsigned long flags;
1354 void *work_val = map->work_buf + map->format.reg_bytes +
1355 map->format.pad_bytes;
1356 void *buf;
1357 int ret = -ENOTSUPP;
1358 size_t len;
1359 int i;
1360
1361 WARN_ON(!map->bus);
1362
1363
1364 if (map->writeable_reg)
1365 for (i = 0; i < val_len / map->format.val_bytes; i++)
1366 if (!map->writeable_reg(map->dev,
1367 reg + regmap_get_offset(map, i)))
1368 return -EINVAL;
1369
1370 if (!map->cache_bypass && map->format.parse_val) {
1371 unsigned int ival;
1372 int val_bytes = map->format.val_bytes;
1373 for (i = 0; i < val_len / val_bytes; i++) {
1374 ival = map->format.parse_val(val + (i * val_bytes));
1375 ret = regcache_write(map,
1376 reg + regmap_get_offset(map, i),
1377 ival);
1378 if (ret) {
1379 dev_err(map->dev,
1380 "Error in caching of register: %x ret: %d\n",
1381 reg + i, ret);
1382 return ret;
1383 }
1384 }
1385 if (map->cache_only) {
1386 map->cache_dirty = true;
1387 return 0;
1388 }
1389 }
1390
1391 range = _regmap_range_lookup(map, reg);
1392 if (range) {
1393 int val_num = val_len / map->format.val_bytes;
1394 int win_offset = (reg - range->range_min) % range->window_len;
1395 int win_residue = range->window_len - win_offset;
1396
1397
1398 while (val_num > win_residue) {
1399 dev_dbg(map->dev, "Writing window %d/%zu\n",
1400 win_residue, val_len / map->format.val_bytes);
1401 ret = _regmap_raw_write(map, reg, val, win_residue *
1402 map->format.val_bytes);
1403 if (ret != 0)
1404 return ret;
1405
1406 reg += win_residue;
1407 val_num -= win_residue;
1408 val += win_residue * map->format.val_bytes;
1409 val_len -= win_residue * map->format.val_bytes;
1410
1411 win_offset = (reg - range->range_min) %
1412 range->window_len;
1413 win_residue = range->window_len - win_offset;
1414 }
1415
1416 ret = _regmap_select_page(map, ®, range, val_num);
1417 if (ret != 0)
1418 return ret;
1419 }
1420
1421 map->format.format_reg(map->work_buf, reg, map->reg_shift);
1422 regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
1423 map->write_flag_mask);
1424
1425
1426
1427
1428
1429
1430 if (val != work_val && val_len == map->format.val_bytes) {
1431 memcpy(work_val, val, map->format.val_bytes);
1432 val = work_val;
1433 }
1434
1435 if (map->async && map->bus->async_write) {
1436 struct regmap_async *async;
1437
1438 trace_regmap_async_write_start(map, reg, val_len);
1439
1440 spin_lock_irqsave(&map->async_lock, flags);
1441 async = list_first_entry_or_null(&map->async_free,
1442 struct regmap_async,
1443 list);
1444 if (async)
1445 list_del(&async->list);
1446 spin_unlock_irqrestore(&map->async_lock, flags);
1447
1448 if (!async) {
1449 async = map->bus->async_alloc();
1450 if (!async)
1451 return -ENOMEM;
1452
1453 async->work_buf = kzalloc(map->format.buf_size,
1454 GFP_KERNEL | GFP_DMA);
1455 if (!async->work_buf) {
1456 kfree(async);
1457 return -ENOMEM;
1458 }
1459 }
1460
1461 async->map = map;
1462
1463
1464 memcpy(async->work_buf, map->work_buf, map->format.pad_bytes +
1465 map->format.reg_bytes + map->format.val_bytes);
1466
1467 spin_lock_irqsave(&map->async_lock, flags);
1468 list_add_tail(&async->list, &map->async_list);
1469 spin_unlock_irqrestore(&map->async_lock, flags);
1470
1471 if (val != work_val)
1472 ret = map->bus->async_write(map->bus_context,
1473 async->work_buf,
1474 map->format.reg_bytes +
1475 map->format.pad_bytes,
1476 val, val_len, async);
1477 else
1478 ret = map->bus->async_write(map->bus_context,
1479 async->work_buf,
1480 map->format.reg_bytes +
1481 map->format.pad_bytes +
1482 val_len, NULL, 0, async);
1483
1484 if (ret != 0) {
1485 dev_err(map->dev, "Failed to schedule write: %d\n",
1486 ret);
1487
1488 spin_lock_irqsave(&map->async_lock, flags);
1489 list_move(&async->list, &map->async_free);
1490 spin_unlock_irqrestore(&map->async_lock, flags);
1491 }
1492
1493 return ret;
1494 }
1495
1496 trace_regmap_hw_write_start(map, reg, val_len / map->format.val_bytes);
1497
1498
1499
1500
1501
1502 if (val == work_val)
1503 ret = map->bus->write(map->bus_context, map->work_buf,
1504 map->format.reg_bytes +
1505 map->format.pad_bytes +
1506 val_len);
1507 else if (map->bus->gather_write)
1508 ret = map->bus->gather_write(map->bus_context, map->work_buf,
1509 map->format.reg_bytes +
1510 map->format.pad_bytes,
1511 val, val_len);
1512
1513
1514 if (ret == -ENOTSUPP) {
1515 len = map->format.reg_bytes + map->format.pad_bytes + val_len;
1516 buf = kzalloc(len, GFP_KERNEL);
1517 if (!buf)
1518 return -ENOMEM;
1519
1520 memcpy(buf, map->work_buf, map->format.reg_bytes);
1521 memcpy(buf + map->format.reg_bytes + map->format.pad_bytes,
1522 val, val_len);
1523 ret = map->bus->write(map->bus_context, buf, len);
1524
1525 kfree(buf);
1526 } else if (ret != 0 && !map->cache_bypass && map->format.parse_val) {
1527
1528
1529
1530 if (map->cache_ops && map->cache_ops->drop)
1531 map->cache_ops->drop(map, reg, reg + 1);
1532 }
1533
1534 trace_regmap_hw_write_done(map, reg, val_len / map->format.val_bytes);
1535
1536 return ret;
1537}
1538
1539
1540
1541
1542
1543
1544bool regmap_can_raw_write(struct regmap *map)
1545{
1546 return map->bus && map->bus->write && map->format.format_val &&
1547 map->format.format_reg;
1548}
1549EXPORT_SYMBOL_GPL(regmap_can_raw_write);
1550
1551
1552
1553
1554
1555
1556size_t regmap_get_raw_read_max(struct regmap *map)
1557{
1558 return map->max_raw_read;
1559}
1560EXPORT_SYMBOL_GPL(regmap_get_raw_read_max);
1561
1562
1563
1564
1565
1566
1567size_t regmap_get_raw_write_max(struct regmap *map)
1568{
1569 return map->max_raw_write;
1570}
1571EXPORT_SYMBOL_GPL(regmap_get_raw_write_max);
1572
1573static int _regmap_bus_formatted_write(void *context, unsigned int reg,
1574 unsigned int val)
1575{
1576 int ret;
1577 struct regmap_range_node *range;
1578 struct regmap *map = context;
1579
1580 WARN_ON(!map->bus || !map->format.format_write);
1581
1582 range = _regmap_range_lookup(map, reg);
1583 if (range) {
1584 ret = _regmap_select_page(map, ®, range, 1);
1585 if (ret != 0)
1586 return ret;
1587 }
1588
1589 map->format.format_write(map, reg, val);
1590
1591 trace_regmap_hw_write_start(map, reg, 1);
1592
1593 ret = map->bus->write(map->bus_context, map->work_buf,
1594 map->format.buf_size);
1595
1596 trace_regmap_hw_write_done(map, reg, 1);
1597
1598 return ret;
1599}
1600
1601static int _regmap_bus_reg_write(void *context, unsigned int reg,
1602 unsigned int val)
1603{
1604 struct regmap *map = context;
1605
1606 return map->bus->reg_write(map->bus_context, reg, val);
1607}
1608
1609static int _regmap_bus_raw_write(void *context, unsigned int reg,
1610 unsigned int val)
1611{
1612 struct regmap *map = context;
1613
1614 WARN_ON(!map->bus || !map->format.format_val);
1615
1616 map->format.format_val(map->work_buf + map->format.reg_bytes
1617 + map->format.pad_bytes, val, 0);
1618 return _regmap_raw_write(map, reg,
1619 map->work_buf +
1620 map->format.reg_bytes +
1621 map->format.pad_bytes,
1622 map->format.val_bytes);
1623}
1624
1625static inline void *_regmap_map_get_context(struct regmap *map)
1626{
1627 return (map->bus) ? map : map->bus_context;
1628}
1629
1630int _regmap_write(struct regmap *map, unsigned int reg,
1631 unsigned int val)
1632{
1633 int ret;
1634 void *context = _regmap_map_get_context(map);
1635
1636 if (!regmap_writeable(map, reg))
1637 return -EIO;
1638
1639 if (!map->cache_bypass && !map->defer_caching) {
1640 ret = regcache_write(map, reg, val);
1641 if (ret != 0)
1642 return ret;
1643 if (map->cache_only) {
1644 map->cache_dirty = true;
1645 return 0;
1646 }
1647 }
1648
1649#ifdef LOG_DEVICE
1650 if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
1651 dev_info(map->dev, "%x <= %x\n", reg, val);
1652#endif
1653
1654 trace_regmap_reg_write(map, reg, val);
1655
1656 return map->reg_write(context, reg, val);
1657}
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
1670{
1671 int ret;
1672
1673 if (!IS_ALIGNED(reg, map->reg_stride))
1674 return -EINVAL;
1675
1676 map->lock(map->lock_arg);
1677
1678 ret = _regmap_write(map, reg, val);
1679
1680 map->unlock(map->lock_arg);
1681
1682 return ret;
1683}
1684EXPORT_SYMBOL_GPL(regmap_write);
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val)
1697{
1698 int ret;
1699
1700 if (!IS_ALIGNED(reg, map->reg_stride))
1701 return -EINVAL;
1702
1703 map->lock(map->lock_arg);
1704
1705 map->async = true;
1706
1707 ret = _regmap_write(map, reg, val);
1708
1709 map->async = false;
1710
1711 map->unlock(map->lock_arg);
1712
1713 return ret;
1714}
1715EXPORT_SYMBOL_GPL(regmap_write_async);
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733int regmap_raw_write(struct regmap *map, unsigned int reg,
1734 const void *val, size_t val_len)
1735{
1736 int ret;
1737
1738 if (!regmap_can_raw_write(map))
1739 return -EINVAL;
1740 if (val_len % map->format.val_bytes)
1741 return -EINVAL;
1742 if (map->max_raw_write && map->max_raw_write > val_len)
1743 return -E2BIG;
1744
1745 map->lock(map->lock_arg);
1746
1747 ret = _regmap_raw_write(map, reg, val, val_len);
1748
1749 map->unlock(map->lock_arg);
1750
1751 return ret;
1752}
1753EXPORT_SYMBOL_GPL(regmap_raw_write);
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772int regmap_field_update_bits_base(struct regmap_field *field,
1773 unsigned int mask, unsigned int val,
1774 bool *change, bool async, bool force)
1775{
1776 mask = (mask << field->shift) & field->mask;
1777
1778 return regmap_update_bits_base(field->regmap, field->reg,
1779 mask, val << field->shift,
1780 change, async, force);
1781}
1782EXPORT_SYMBOL_GPL(regmap_field_update_bits_base);
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799int regmap_fields_update_bits_base(struct regmap_field *field, unsigned int id,
1800 unsigned int mask, unsigned int val,
1801 bool *change, bool async, bool force)
1802{
1803 if (id >= field->id_size)
1804 return -EINVAL;
1805
1806 mask = (mask << field->shift) & field->mask;
1807
1808 return regmap_update_bits_base(field->regmap,
1809 field->reg + (field->id_offset * id),
1810 mask, val << field->shift,
1811 change, async, force);
1812}
1813EXPORT_SYMBOL_GPL(regmap_fields_update_bits_base);
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
1830 size_t val_count)
1831{
1832 int ret = 0, i;
1833 size_t val_bytes = map->format.val_bytes;
1834 size_t total_size = val_bytes * val_count;
1835
1836 if (!IS_ALIGNED(reg, map->reg_stride))
1837 return -EINVAL;
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850 if (!map->bus) {
1851 map->lock(map->lock_arg);
1852 for (i = 0; i < val_count; i++) {
1853 unsigned int ival;
1854
1855 switch (val_bytes) {
1856 case 1:
1857 ival = *(u8 *)(val + (i * val_bytes));
1858 break;
1859 case 2:
1860 ival = *(u16 *)(val + (i * val_bytes));
1861 break;
1862 case 4:
1863 ival = *(u32 *)(val + (i * val_bytes));
1864 break;
1865#ifdef CONFIG_64BIT
1866 case 8:
1867 ival = *(u64 *)(val + (i * val_bytes));
1868 break;
1869#endif
1870 default:
1871 ret = -EINVAL;
1872 goto out;
1873 }
1874
1875 ret = _regmap_write(map,
1876 reg + regmap_get_offset(map, i),
1877 ival);
1878 if (ret != 0)
1879 goto out;
1880 }
1881out:
1882 map->unlock(map->lock_arg);
1883 } else if (map->bus && !map->format.parse_inplace) {
1884 const u8 *u8 = val;
1885 const u16 *u16 = val;
1886 const u32 *u32 = val;
1887 unsigned int ival;
1888
1889 for (i = 0; i < val_count; i++) {
1890 switch (map->format.val_bytes) {
1891 case 4:
1892 ival = u32[i];
1893 break;
1894 case 2:
1895 ival = u16[i];
1896 break;
1897 case 1:
1898 ival = u8[i];
1899 break;
1900 default:
1901 return -EINVAL;
1902 }
1903
1904 ret = regmap_write(map, reg + (i * map->reg_stride),
1905 ival);
1906 if (ret)
1907 return ret;
1908 }
1909 } else if (map->use_single_write ||
1910 (map->max_raw_write && map->max_raw_write < total_size)) {
1911 int chunk_stride = map->reg_stride;
1912 size_t chunk_size = val_bytes;
1913 size_t chunk_count = val_count;
1914
1915 if (!map->use_single_write) {
1916 chunk_size = map->max_raw_write;
1917 if (chunk_size % val_bytes)
1918 chunk_size -= chunk_size % val_bytes;
1919 chunk_count = total_size / chunk_size;
1920 chunk_stride *= chunk_size / val_bytes;
1921 }
1922
1923 map->lock(map->lock_arg);
1924
1925 for (i = 0; i < chunk_count; i++) {
1926 ret = _regmap_raw_write(map,
1927 reg + (i * chunk_stride),
1928 val + (i * chunk_size),
1929 chunk_size);
1930 if (ret)
1931 break;
1932 }
1933
1934
1935 if (!ret && chunk_size * i < total_size) {
1936 ret = _regmap_raw_write(map, reg + (i * chunk_stride),
1937 val + (i * chunk_size),
1938 total_size - i * chunk_size);
1939 }
1940 map->unlock(map->lock_arg);
1941 } else {
1942 void *wval;
1943
1944 if (!val_count)
1945 return -EINVAL;
1946
1947 wval = kmemdup(val, val_count * val_bytes, map->alloc_flags);
1948 if (!wval) {
1949 dev_err(map->dev, "Error in memory allocation\n");
1950 return -ENOMEM;
1951 }
1952 for (i = 0; i < val_count * val_bytes; i += val_bytes)
1953 map->format.parse_inplace(wval + i);
1954
1955 map->lock(map->lock_arg);
1956 ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
1957 map->unlock(map->lock_arg);
1958
1959 kfree(wval);
1960 }
1961 return ret;
1962}
1963EXPORT_SYMBOL_GPL(regmap_bulk_write);
1964
1965
1966
1967
1968
1969
1970
1971
1972static int _regmap_raw_multi_reg_write(struct regmap *map,
1973 const struct reg_sequence *regs,
1974 size_t num_regs)
1975{
1976 int ret;
1977 void *buf;
1978 int i;
1979 u8 *u8;
1980 size_t val_bytes = map->format.val_bytes;
1981 size_t reg_bytes = map->format.reg_bytes;
1982 size_t pad_bytes = map->format.pad_bytes;
1983 size_t pair_size = reg_bytes + pad_bytes + val_bytes;
1984 size_t len = pair_size * num_regs;
1985
1986 if (!len)
1987 return -EINVAL;
1988
1989 buf = kzalloc(len, GFP_KERNEL);
1990 if (!buf)
1991 return -ENOMEM;
1992
1993
1994
1995 u8 = buf;
1996
1997 for (i = 0; i < num_regs; i++) {
1998 unsigned int reg = regs[i].reg;
1999 unsigned int val = regs[i].def;
2000 trace_regmap_hw_write_start(map, reg, 1);
2001 map->format.format_reg(u8, reg, map->reg_shift);
2002 u8 += reg_bytes + pad_bytes;
2003 map->format.format_val(u8, val, 0);
2004 u8 += val_bytes;
2005 }
2006 u8 = buf;
2007 *u8 |= map->write_flag_mask;
2008
2009 ret = map->bus->write(map->bus_context, buf, len);
2010
2011 kfree(buf);
2012
2013 for (i = 0; i < num_regs; i++) {
2014 int reg = regs[i].reg;
2015 trace_regmap_hw_write_done(map, reg, 1);
2016 }
2017 return ret;
2018}
2019
2020static unsigned int _regmap_register_page(struct regmap *map,
2021 unsigned int reg,
2022 struct regmap_range_node *range)
2023{
2024 unsigned int win_page = (reg - range->range_min) / range->window_len;
2025
2026 return win_page;
2027}
2028
2029static int _regmap_range_multi_paged_reg_write(struct regmap *map,
2030 struct reg_sequence *regs,
2031 size_t num_regs)
2032{
2033 int ret;
2034 int i, n;
2035 struct reg_sequence *base;
2036 unsigned int this_page = 0;
2037 unsigned int page_change = 0;
2038
2039
2040
2041
2042
2043
2044 base = regs;
2045 for (i = 0, n = 0; i < num_regs; i++, n++) {
2046 unsigned int reg = regs[i].reg;
2047 struct regmap_range_node *range;
2048
2049 range = _regmap_range_lookup(map, reg);
2050 if (range) {
2051 unsigned int win_page = _regmap_register_page(map, reg,
2052 range);
2053
2054 if (i == 0)
2055 this_page = win_page;
2056 if (win_page != this_page) {
2057 this_page = win_page;
2058 page_change = 1;
2059 }
2060 }
2061
2062
2063
2064
2065
2066
2067 if (page_change || regs[i].delay_us) {
2068
2069
2070
2071
2072
2073
2074
2075 if (regs[i].delay_us && i == 0)
2076 n = 1;
2077
2078 ret = _regmap_raw_multi_reg_write(map, base, n);
2079 if (ret != 0)
2080 return ret;
2081
2082 if (regs[i].delay_us)
2083 udelay(regs[i].delay_us);
2084
2085 base += n;
2086 n = 0;
2087
2088 if (page_change) {
2089 ret = _regmap_select_page(map,
2090 &base[n].reg,
2091 range, 1);
2092 if (ret != 0)
2093 return ret;
2094
2095 page_change = 0;
2096 }
2097
2098 }
2099
2100 }
2101 if (n > 0)
2102 return _regmap_raw_multi_reg_write(map, base, n);
2103 return 0;
2104}
2105
2106static int _regmap_multi_reg_write(struct regmap *map,
2107 const struct reg_sequence *regs,
2108 size_t num_regs)
2109{
2110 int i;
2111 int ret;
2112
2113 if (!map->can_multi_write) {
2114 for (i = 0; i < num_regs; i++) {
2115 ret = _regmap_write(map, regs[i].reg, regs[i].def);
2116 if (ret != 0)
2117 return ret;
2118
2119 if (regs[i].delay_us)
2120 udelay(regs[i].delay_us);
2121 }
2122 return 0;
2123 }
2124
2125 if (!map->format.parse_inplace)
2126 return -EINVAL;
2127
2128 if (map->writeable_reg)
2129 for (i = 0; i < num_regs; i++) {
2130 int reg = regs[i].reg;
2131 if (!map->writeable_reg(map->dev, reg))
2132 return -EINVAL;
2133 if (!IS_ALIGNED(reg, map->reg_stride))
2134 return -EINVAL;
2135 }
2136
2137 if (!map->cache_bypass) {
2138 for (i = 0; i < num_regs; i++) {
2139 unsigned int val = regs[i].def;
2140 unsigned int reg = regs[i].reg;
2141 ret = regcache_write(map, reg, val);
2142 if (ret) {
2143 dev_err(map->dev,
2144 "Error in caching of register: %x ret: %d\n",
2145 reg, ret);
2146 return ret;
2147 }
2148 }
2149 if (map->cache_only) {
2150 map->cache_dirty = true;
2151 return 0;
2152 }
2153 }
2154
2155 WARN_ON(!map->bus);
2156
2157 for (i = 0; i < num_regs; i++) {
2158 unsigned int reg = regs[i].reg;
2159 struct regmap_range_node *range;
2160
2161
2162
2163
2164 range = _regmap_range_lookup(map, reg);
2165 if (range || regs[i].delay_us) {
2166 size_t len = sizeof(struct reg_sequence)*num_regs;
2167 struct reg_sequence *base = kmemdup(regs, len,
2168 GFP_KERNEL);
2169 if (!base)
2170 return -ENOMEM;
2171 ret = _regmap_range_multi_paged_reg_write(map, base,
2172 num_regs);
2173 kfree(base);
2174
2175 return ret;
2176 }
2177 }
2178 return _regmap_raw_multi_reg_write(map, regs, num_regs);
2179}
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200int regmap_multi_reg_write(struct regmap *map, const struct reg_sequence *regs,
2201 int num_regs)
2202{
2203 int ret;
2204
2205 map->lock(map->lock_arg);
2206
2207 ret = _regmap_multi_reg_write(map, regs, num_regs);
2208
2209 map->unlock(map->lock_arg);
2210
2211 return ret;
2212}
2213EXPORT_SYMBOL_GPL(regmap_multi_reg_write);
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233int regmap_multi_reg_write_bypassed(struct regmap *map,
2234 const struct reg_sequence *regs,
2235 int num_regs)
2236{
2237 int ret;
2238 bool bypass;
2239
2240 map->lock(map->lock_arg);
2241
2242 bypass = map->cache_bypass;
2243 map->cache_bypass = true;
2244
2245 ret = _regmap_multi_reg_write(map, regs, num_regs);
2246
2247 map->cache_bypass = bypass;
2248
2249 map->unlock(map->lock_arg);
2250
2251 return ret;
2252}
2253EXPORT_SYMBOL_GPL(regmap_multi_reg_write_bypassed);
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277int regmap_raw_write_async(struct regmap *map, unsigned int reg,
2278 const void *val, size_t val_len)
2279{
2280 int ret;
2281
2282 if (val_len % map->format.val_bytes)
2283 return -EINVAL;
2284 if (!IS_ALIGNED(reg, map->reg_stride))
2285 return -EINVAL;
2286
2287 map->lock(map->lock_arg);
2288
2289 map->async = true;
2290
2291 ret = _regmap_raw_write(map, reg, val, val_len);
2292
2293 map->async = false;
2294
2295 map->unlock(map->lock_arg);
2296
2297 return ret;
2298}
2299EXPORT_SYMBOL_GPL(regmap_raw_write_async);
2300
2301static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
2302 unsigned int val_len)
2303{
2304 struct regmap_range_node *range;
2305 int ret;
2306
2307 WARN_ON(!map->bus);
2308
2309 if (!map->bus || !map->bus->read)
2310 return -EINVAL;
2311
2312 range = _regmap_range_lookup(map, reg);
2313 if (range) {
2314 ret = _regmap_select_page(map, ®, range,
2315 val_len / map->format.val_bytes);
2316 if (ret != 0)
2317 return ret;
2318 }
2319
2320 map->format.format_reg(map->work_buf, reg, map->reg_shift);
2321 regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
2322 map->read_flag_mask);
2323 trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes);
2324
2325 ret = map->bus->read(map->bus_context, map->work_buf,
2326 map->format.reg_bytes + map->format.pad_bytes,
2327 val, val_len);
2328
2329 trace_regmap_hw_read_done(map, reg, val_len / map->format.val_bytes);
2330
2331 return ret;
2332}
2333
2334static int _regmap_bus_reg_read(void *context, unsigned int reg,
2335 unsigned int *val)
2336{
2337 struct regmap *map = context;
2338
2339 return map->bus->reg_read(map->bus_context, reg, val);
2340}
2341
2342static int _regmap_bus_read(void *context, unsigned int reg,
2343 unsigned int *val)
2344{
2345 int ret;
2346 struct regmap *map = context;
2347
2348 if (!map->format.parse_val)
2349 return -EINVAL;
2350
2351 ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes);
2352 if (ret == 0)
2353 *val = map->format.parse_val(map->work_buf);
2354
2355 return ret;
2356}
2357
2358static int _regmap_read(struct regmap *map, unsigned int reg,
2359 unsigned int *val)
2360{
2361 int ret;
2362 void *context = _regmap_map_get_context(map);
2363
2364 if (!map->cache_bypass) {
2365 ret = regcache_read(map, reg, val);
2366 if (ret == 0)
2367 return 0;
2368 }
2369
2370 if (map->cache_only)
2371 return -EBUSY;
2372
2373 if (!regmap_readable(map, reg))
2374 return -EIO;
2375
2376 ret = map->reg_read(context, reg, val);
2377 if (ret == 0) {
2378#ifdef LOG_DEVICE
2379 if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
2380 dev_info(map->dev, "%x => %x\n", reg, *val);
2381#endif
2382
2383 trace_regmap_reg_read(map, reg, *val);
2384
2385 if (!map->cache_bypass)
2386 regcache_write(map, reg, *val);
2387 }
2388
2389 return ret;
2390}
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
2403{
2404 int ret;
2405
2406 if (!IS_ALIGNED(reg, map->reg_stride))
2407 return -EINVAL;
2408
2409 map->lock(map->lock_arg);
2410
2411 ret = _regmap_read(map, reg, val);
2412
2413 map->unlock(map->lock_arg);
2414
2415 return ret;
2416}
2417EXPORT_SYMBOL_GPL(regmap_read);
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
2431 size_t val_len)
2432{
2433 size_t val_bytes = map->format.val_bytes;
2434 size_t val_count = val_len / val_bytes;
2435 unsigned int v;
2436 int ret, i;
2437
2438 if (!map->bus)
2439 return -EINVAL;
2440 if (val_len % map->format.val_bytes)
2441 return -EINVAL;
2442 if (!IS_ALIGNED(reg, map->reg_stride))
2443 return -EINVAL;
2444 if (val_count == 0)
2445 return -EINVAL;
2446
2447 map->lock(map->lock_arg);
2448
2449 if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
2450 map->cache_type == REGCACHE_NONE) {
2451 if (!map->bus->read) {
2452 ret = -ENOTSUPP;
2453 goto out;
2454 }
2455 if (map->max_raw_read && map->max_raw_read < val_len) {
2456 ret = -E2BIG;
2457 goto out;
2458 }
2459
2460
2461 ret = _regmap_raw_read(map, reg, val, val_len);
2462
2463 } else {
2464
2465
2466
2467 for (i = 0; i < val_count; i++) {
2468 ret = _regmap_read(map, reg + regmap_get_offset(map, i),
2469 &v);
2470 if (ret != 0)
2471 goto out;
2472
2473 map->format.format_val(val + (i * val_bytes), v, 0);
2474 }
2475 }
2476
2477 out:
2478 map->unlock(map->lock_arg);
2479
2480 return ret;
2481}
2482EXPORT_SYMBOL_GPL(regmap_raw_read);
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493int regmap_field_read(struct regmap_field *field, unsigned int *val)
2494{
2495 int ret;
2496 unsigned int reg_val;
2497 ret = regmap_read(field->regmap, field->reg, ®_val);
2498 if (ret != 0)
2499 return ret;
2500
2501 reg_val &= field->mask;
2502 reg_val >>= field->shift;
2503 *val = reg_val;
2504
2505 return ret;
2506}
2507EXPORT_SYMBOL_GPL(regmap_field_read);
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519int regmap_fields_read(struct regmap_field *field, unsigned int id,
2520 unsigned int *val)
2521{
2522 int ret;
2523 unsigned int reg_val;
2524
2525 if (id >= field->id_size)
2526 return -EINVAL;
2527
2528 ret = regmap_read(field->regmap,
2529 field->reg + (field->id_offset * id),
2530 ®_val);
2531 if (ret != 0)
2532 return ret;
2533
2534 reg_val &= field->mask;
2535 reg_val >>= field->shift;
2536 *val = reg_val;
2537
2538 return ret;
2539}
2540EXPORT_SYMBOL_GPL(regmap_fields_read);
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
2554 size_t val_count)
2555{
2556 int ret, i;
2557 size_t val_bytes = map->format.val_bytes;
2558 bool vol = regmap_volatile_range(map, reg, val_count);
2559
2560 if (!IS_ALIGNED(reg, map->reg_stride))
2561 return -EINVAL;
2562
2563 if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
2564
2565
2566
2567
2568 size_t total_size = val_bytes * val_count;
2569
2570 if (!map->use_single_read &&
2571 (!map->max_raw_read || map->max_raw_read > total_size)) {
2572 ret = regmap_raw_read(map, reg, val,
2573 val_bytes * val_count);
2574 if (ret != 0)
2575 return ret;
2576 } else {
2577
2578
2579
2580
2581
2582 int chunk_stride = map->reg_stride;
2583 size_t chunk_size = val_bytes;
2584 size_t chunk_count = val_count;
2585
2586 if (!map->use_single_read) {
2587 chunk_size = map->max_raw_read;
2588 if (chunk_size % val_bytes)
2589 chunk_size -= chunk_size % val_bytes;
2590 chunk_count = total_size / chunk_size;
2591 chunk_stride *= chunk_size / val_bytes;
2592 }
2593
2594
2595 for (i = 0; i < chunk_count; i++) {
2596 ret = regmap_raw_read(map,
2597 reg + (i * chunk_stride),
2598 val + (i * chunk_size),
2599 chunk_size);
2600 if (ret != 0)
2601 return ret;
2602 }
2603
2604
2605 if (chunk_size * i < total_size) {
2606 ret = regmap_raw_read(map,
2607 reg + (i * chunk_stride),
2608 val + (i * chunk_size),
2609 total_size - i * chunk_size);
2610 if (ret != 0)
2611 return ret;
2612 }
2613 }
2614
2615 for (i = 0; i < val_count * val_bytes; i += val_bytes)
2616 map->format.parse_inplace(val + i);
2617 } else {
2618 for (i = 0; i < val_count; i++) {
2619 unsigned int ival;
2620 ret = regmap_read(map, reg + regmap_get_offset(map, i),
2621 &ival);
2622 if (ret != 0)
2623 return ret;
2624
2625 if (map->format.format_val) {
2626 map->format.format_val(val + (i * val_bytes), ival, 0);
2627 } else {
2628
2629
2630
2631
2632
2633
2634#ifdef CONFIG_64BIT
2635 u64 *u64 = val;
2636#endif
2637 u32 *u32 = val;
2638 u16 *u16 = val;
2639 u8 *u8 = val;
2640
2641 switch (map->format.val_bytes) {
2642#ifdef CONFIG_64BIT
2643 case 8:
2644 u64[i] = ival;
2645 break;
2646#endif
2647 case 4:
2648 u32[i] = ival;
2649 break;
2650 case 2:
2651 u16[i] = ival;
2652 break;
2653 case 1:
2654 u8[i] = ival;
2655 break;
2656 default:
2657 return -EINVAL;
2658 }
2659 }
2660 }
2661 }
2662
2663 return 0;
2664}
2665EXPORT_SYMBOL_GPL(regmap_bulk_read);
2666
2667static int _regmap_update_bits(struct regmap *map, unsigned int reg,
2668 unsigned int mask, unsigned int val,
2669 bool *change, bool force_write)
2670{
2671 int ret;
2672 unsigned int tmp, orig;
2673
2674 if (change)
2675 *change = false;
2676
2677 if (regmap_volatile(map, reg) && map->reg_update_bits) {
2678 ret = map->reg_update_bits(map->bus_context, reg, mask, val);
2679 if (ret == 0 && change)
2680 *change = true;
2681 } else {
2682 ret = _regmap_read(map, reg, &orig);
2683 if (ret != 0)
2684 return ret;
2685
2686 tmp = orig & ~mask;
2687 tmp |= val & mask;
2688
2689 if (force_write || (tmp != orig)) {
2690 ret = _regmap_write(map, reg, tmp);
2691 if (ret == 0 && change)
2692 *change = true;
2693 }
2694 }
2695
2696 return ret;
2697}
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721int regmap_update_bits_base(struct regmap *map, unsigned int reg,
2722 unsigned int mask, unsigned int val,
2723 bool *change, bool async, bool force)
2724{
2725 int ret;
2726
2727 map->lock(map->lock_arg);
2728
2729 map->async = async;
2730
2731 ret = _regmap_update_bits(map, reg, mask, val, change, force);
2732
2733 map->async = false;
2734
2735 map->unlock(map->lock_arg);
2736
2737 return ret;
2738}
2739EXPORT_SYMBOL_GPL(regmap_update_bits_base);
2740
2741void regmap_async_complete_cb(struct regmap_async *async, int ret)
2742{
2743 struct regmap *map = async->map;
2744 bool wake;
2745
2746 trace_regmap_async_io_complete(map);
2747
2748 spin_lock(&map->async_lock);
2749 list_move(&async->list, &map->async_free);
2750 wake = list_empty(&map->async_list);
2751
2752 if (ret != 0)
2753 map->async_ret = ret;
2754
2755 spin_unlock(&map->async_lock);
2756
2757 if (wake)
2758 wake_up(&map->async_waitq);
2759}
2760EXPORT_SYMBOL_GPL(regmap_async_complete_cb);
2761
2762static int regmap_async_is_done(struct regmap *map)
2763{
2764 unsigned long flags;
2765 int ret;
2766
2767 spin_lock_irqsave(&map->async_lock, flags);
2768 ret = list_empty(&map->async_list);
2769 spin_unlock_irqrestore(&map->async_lock, flags);
2770
2771 return ret;
2772}
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782int regmap_async_complete(struct regmap *map)
2783{
2784 unsigned long flags;
2785 int ret;
2786
2787
2788 if (!map->bus || !map->bus->async_write)
2789 return 0;
2790
2791 trace_regmap_async_complete_start(map);
2792
2793 wait_event(map->async_waitq, regmap_async_is_done(map));
2794
2795 spin_lock_irqsave(&map->async_lock, flags);
2796 ret = map->async_ret;
2797 map->async_ret = 0;
2798 spin_unlock_irqrestore(&map->async_lock, flags);
2799
2800 trace_regmap_async_complete_done(map);
2801
2802 return ret;
2803}
2804EXPORT_SYMBOL_GPL(regmap_async_complete);
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823int regmap_register_patch(struct regmap *map, const struct reg_sequence *regs,
2824 int num_regs)
2825{
2826 struct reg_sequence *p;
2827 int ret;
2828 bool bypass;
2829
2830 if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n",
2831 num_regs))
2832 return 0;
2833
2834 p = krealloc(map->patch,
2835 sizeof(struct reg_sequence) * (map->patch_regs + num_regs),
2836 GFP_KERNEL);
2837 if (p) {
2838 memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs));
2839 map->patch = p;
2840 map->patch_regs += num_regs;
2841 } else {
2842 return -ENOMEM;
2843 }
2844
2845 map->lock(map->lock_arg);
2846
2847 bypass = map->cache_bypass;
2848
2849 map->cache_bypass = true;
2850 map->async = true;
2851
2852 ret = _regmap_multi_reg_write(map, regs, num_regs);
2853
2854 map->async = false;
2855 map->cache_bypass = bypass;
2856
2857 map->unlock(map->lock_arg);
2858
2859 regmap_async_complete(map);
2860
2861 return ret;
2862}
2863EXPORT_SYMBOL_GPL(regmap_register_patch);
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873int regmap_get_val_bytes(struct regmap *map)
2874{
2875 if (map->format.format_write)
2876 return -EINVAL;
2877
2878 return map->format.val_bytes;
2879}
2880EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890int regmap_get_max_register(struct regmap *map)
2891{
2892 return map->max_register ? map->max_register : -EINVAL;
2893}
2894EXPORT_SYMBOL_GPL(regmap_get_max_register);
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904int regmap_get_reg_stride(struct regmap *map)
2905{
2906 return map->reg_stride;
2907}
2908EXPORT_SYMBOL_GPL(regmap_get_reg_stride);
2909
2910int regmap_parse_val(struct regmap *map, const void *buf,
2911 unsigned int *val)
2912{
2913 if (!map->format.parse_val)
2914 return -EINVAL;
2915
2916 *val = map->format.parse_val(buf);
2917
2918 return 0;
2919}
2920EXPORT_SYMBOL_GPL(regmap_parse_val);
2921
2922static int __init regmap_initcall(void)
2923{
2924 regmap_debugfs_initcall();
2925
2926 return 0;
2927}
2928postcore_initcall(regmap_initcall);
2929