1 // SPDX-License-Identifier: GPL-2.0
3 // Register map access API
5 // Copyright 2011 Wolfson Microelectronics plc
7 // Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
9 #include <linux/device.h>
10 #include <linux/slab.h>
11 #include <linux/export.h>
12 #include <linux/mutex.h>
13 #include <linux/err.h>
14 #include <linux/property.h>
15 #include <linux/rbtree.h>
16 #include <linux/sched.h>
17 #include <linux/delay.h>
18 #include <linux/log2.h>
19 #include <linux/hwspinlock.h>
20 #include <asm/unaligned.h>
22 #define CREATE_TRACE_POINTS
28 * Sometimes for failures during very early init the trace
29 * infrastructure isn't available early enough to be used. For this
30 * sort of problem defining LOG_DEVICE will add printks for basic
31 * register I/O on a specific device.
36 static inline bool regmap_should_log(struct regmap *map)
38 return (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0);
41 static inline bool regmap_should_log(struct regmap *map) { return false; }
45 static int _regmap_update_bits(struct regmap *map, unsigned int reg,
46 unsigned int mask, unsigned int val,
47 bool *change, bool force_write);
49 static int _regmap_bus_reg_read(void *context, unsigned int reg,
51 static int _regmap_bus_read(void *context, unsigned int reg,
53 static int _regmap_bus_formatted_write(void *context, unsigned int reg,
55 static int _regmap_bus_reg_write(void *context, unsigned int reg,
57 static int _regmap_bus_raw_write(void *context, unsigned int reg,
60 bool regmap_reg_in_ranges(unsigned int reg,
61 const struct regmap_range *ranges,
64 const struct regmap_range *r;
67 for (i = 0, r = ranges; i < nranges; i++, r++)
68 if (regmap_reg_in_range(reg, r))
72 EXPORT_SYMBOL_GPL(regmap_reg_in_ranges);
74 bool regmap_check_range_table(struct regmap *map, unsigned int reg,
75 const struct regmap_access_table *table)
77 /* Check "no ranges" first */
78 if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges))
81 /* In case zero "yes ranges" are supplied, any reg is OK */
82 if (!table->n_yes_ranges)
85 return regmap_reg_in_ranges(reg, table->yes_ranges,
88 EXPORT_SYMBOL_GPL(regmap_check_range_table);
90 bool regmap_writeable(struct regmap *map, unsigned int reg)
92 if (map->max_register && reg > map->max_register)
95 if (map->writeable_reg)
96 return map->writeable_reg(map->dev, reg);
99 return regmap_check_range_table(map, reg, map->wr_table);
104 bool regmap_cached(struct regmap *map, unsigned int reg)
109 if (map->cache_type == REGCACHE_NONE)
115 if (map->max_register && reg > map->max_register)
118 map->lock(map->lock_arg);
119 ret = regcache_read(map, reg, &val);
120 map->unlock(map->lock_arg);
127 bool regmap_readable(struct regmap *map, unsigned int reg)
132 if (map->max_register && reg > map->max_register)
135 if (map->format.format_write)
138 if (map->readable_reg)
139 return map->readable_reg(map->dev, reg);
142 return regmap_check_range_table(map, reg, map->rd_table);
147 bool regmap_volatile(struct regmap *map, unsigned int reg)
149 if (!map->format.format_write && !regmap_readable(map, reg))
152 if (map->volatile_reg)
153 return map->volatile_reg(map->dev, reg);
155 if (map->volatile_table)
156 return regmap_check_range_table(map, reg, map->volatile_table);
164 bool regmap_precious(struct regmap *map, unsigned int reg)
166 if (!regmap_readable(map, reg))
169 if (map->precious_reg)
170 return map->precious_reg(map->dev, reg);
172 if (map->precious_table)
173 return regmap_check_range_table(map, reg, map->precious_table);
178 bool regmap_writeable_noinc(struct regmap *map, unsigned int reg)
180 if (map->writeable_noinc_reg)
181 return map->writeable_noinc_reg(map->dev, reg);
183 if (map->wr_noinc_table)
184 return regmap_check_range_table(map, reg, map->wr_noinc_table);
189 bool regmap_readable_noinc(struct regmap *map, unsigned int reg)
191 if (map->readable_noinc_reg)
192 return map->readable_noinc_reg(map->dev, reg);
194 if (map->rd_noinc_table)
195 return regmap_check_range_table(map, reg, map->rd_noinc_table);
200 static bool regmap_volatile_range(struct regmap *map, unsigned int reg,
205 for (i = 0; i < num; i++)
206 if (!regmap_volatile(map, reg + regmap_get_offset(map, i)))
212 static void regmap_format_12_20_write(struct regmap *map,
213 unsigned int reg, unsigned int val)
215 u8 *out = map->work_buf;
218 out[1] = (reg << 4) | (val >> 16);
224 static void regmap_format_2_6_write(struct regmap *map,
225 unsigned int reg, unsigned int val)
227 u8 *out = map->work_buf;
229 *out = (reg << 6) | val;
232 static void regmap_format_4_12_write(struct regmap *map,
233 unsigned int reg, unsigned int val)
235 __be16 *out = map->work_buf;
236 *out = cpu_to_be16((reg << 12) | val);
239 static void regmap_format_7_9_write(struct regmap *map,
240 unsigned int reg, unsigned int val)
242 __be16 *out = map->work_buf;
243 *out = cpu_to_be16((reg << 9) | val);
246 static void regmap_format_7_17_write(struct regmap *map,
247 unsigned int reg, unsigned int val)
249 u8 *out = map->work_buf;
253 out[0] = (val >> 16) | (reg << 1);
256 static void regmap_format_10_14_write(struct regmap *map,
257 unsigned int reg, unsigned int val)
259 u8 *out = map->work_buf;
262 out[1] = (val >> 8) | (reg << 6);
266 static void regmap_format_8(void *buf, unsigned int val, unsigned int shift)
273 static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift)
275 put_unaligned_be16(val << shift, buf);
278 static void regmap_format_16_le(void *buf, unsigned int val, unsigned int shift)
280 put_unaligned_le16(val << shift, buf);
283 static void regmap_format_16_native(void *buf, unsigned int val,
286 u16 v = val << shift;
288 memcpy(buf, &v, sizeof(v));
291 static void regmap_format_24(void *buf, unsigned int val, unsigned int shift)
302 static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift)
304 put_unaligned_be32(val << shift, buf);
307 static void regmap_format_32_le(void *buf, unsigned int val, unsigned int shift)
309 put_unaligned_le32(val << shift, buf);
312 static void regmap_format_32_native(void *buf, unsigned int val,
315 u32 v = val << shift;
317 memcpy(buf, &v, sizeof(v));
321 static void regmap_format_64_be(void *buf, unsigned int val, unsigned int shift)
323 put_unaligned_be64((u64) val << shift, buf);
326 static void regmap_format_64_le(void *buf, unsigned int val, unsigned int shift)
328 put_unaligned_le64((u64) val << shift, buf);
331 static void regmap_format_64_native(void *buf, unsigned int val,
334 u64 v = (u64) val << shift;
336 memcpy(buf, &v, sizeof(v));
340 static void regmap_parse_inplace_noop(void *buf)
344 static unsigned int regmap_parse_8(const void *buf)
351 static unsigned int regmap_parse_16_be(const void *buf)
353 return get_unaligned_be16(buf);
356 static unsigned int regmap_parse_16_le(const void *buf)
358 return get_unaligned_le16(buf);
361 static void regmap_parse_16_be_inplace(void *buf)
363 u16 v = get_unaligned_be16(buf);
365 memcpy(buf, &v, sizeof(v));
368 static void regmap_parse_16_le_inplace(void *buf)
370 u16 v = get_unaligned_le16(buf);
372 memcpy(buf, &v, sizeof(v));
375 static unsigned int regmap_parse_16_native(const void *buf)
379 memcpy(&v, buf, sizeof(v));
383 static unsigned int regmap_parse_24(const void *buf)
386 unsigned int ret = b[2];
387 ret |= ((unsigned int)b[1]) << 8;
388 ret |= ((unsigned int)b[0]) << 16;
393 static unsigned int regmap_parse_32_be(const void *buf)
395 return get_unaligned_be32(buf);
398 static unsigned int regmap_parse_32_le(const void *buf)
400 return get_unaligned_le32(buf);
403 static void regmap_parse_32_be_inplace(void *buf)
405 u32 v = get_unaligned_be32(buf);
407 memcpy(buf, &v, sizeof(v));
410 static void regmap_parse_32_le_inplace(void *buf)
412 u32 v = get_unaligned_le32(buf);
414 memcpy(buf, &v, sizeof(v));
417 static unsigned int regmap_parse_32_native(const void *buf)
421 memcpy(&v, buf, sizeof(v));
426 static unsigned int regmap_parse_64_be(const void *buf)
428 return get_unaligned_be64(buf);
431 static unsigned int regmap_parse_64_le(const void *buf)
433 return get_unaligned_le64(buf);
436 static void regmap_parse_64_be_inplace(void *buf)
438 u64 v = get_unaligned_be64(buf);
440 memcpy(buf, &v, sizeof(v));
443 static void regmap_parse_64_le_inplace(void *buf)
445 u64 v = get_unaligned_le64(buf);
447 memcpy(buf, &v, sizeof(v));
450 static unsigned int regmap_parse_64_native(const void *buf)
454 memcpy(&v, buf, sizeof(v));
459 static void regmap_lock_hwlock(void *__map)
461 struct regmap *map = __map;
463 hwspin_lock_timeout(map->hwlock, UINT_MAX);
466 static void regmap_lock_hwlock_irq(void *__map)
468 struct regmap *map = __map;
470 hwspin_lock_timeout_irq(map->hwlock, UINT_MAX);
473 static void regmap_lock_hwlock_irqsave(void *__map)
475 struct regmap *map = __map;
477 hwspin_lock_timeout_irqsave(map->hwlock, UINT_MAX,
478 &map->spinlock_flags);
481 static void regmap_unlock_hwlock(void *__map)
483 struct regmap *map = __map;
485 hwspin_unlock(map->hwlock);
488 static void regmap_unlock_hwlock_irq(void *__map)
490 struct regmap *map = __map;
492 hwspin_unlock_irq(map->hwlock);
495 static void regmap_unlock_hwlock_irqrestore(void *__map)
497 struct regmap *map = __map;
499 hwspin_unlock_irqrestore(map->hwlock, &map->spinlock_flags);
502 static void regmap_lock_unlock_none(void *__map)
507 static void regmap_lock_mutex(void *__map)
509 struct regmap *map = __map;
510 mutex_lock(&map->mutex);
513 static void regmap_unlock_mutex(void *__map)
515 struct regmap *map = __map;
516 mutex_unlock(&map->mutex);
519 static void regmap_lock_spinlock(void *__map)
520 __acquires(&map->spinlock)
522 struct regmap *map = __map;
525 spin_lock_irqsave(&map->spinlock, flags);
526 map->spinlock_flags = flags;
529 static void regmap_unlock_spinlock(void *__map)
530 __releases(&map->spinlock)
532 struct regmap *map = __map;
533 spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags);
536 static void dev_get_regmap_release(struct device *dev, void *res)
539 * We don't actually have anything to do here; the goal here
540 * is not to manage the regmap but to provide a simple way to
541 * get the regmap back given a struct device.
545 static bool _regmap_range_add(struct regmap *map,
546 struct regmap_range_node *data)
548 struct rb_root *root = &map->range_tree;
549 struct rb_node **new = &(root->rb_node), *parent = NULL;
552 struct regmap_range_node *this =
553 rb_entry(*new, struct regmap_range_node, node);
556 if (data->range_max < this->range_min)
557 new = &((*new)->rb_left);
558 else if (data->range_min > this->range_max)
559 new = &((*new)->rb_right);
564 rb_link_node(&data->node, parent, new);
565 rb_insert_color(&data->node, root);
570 static struct regmap_range_node *_regmap_range_lookup(struct regmap *map,
573 struct rb_node *node = map->range_tree.rb_node;
576 struct regmap_range_node *this =
577 rb_entry(node, struct regmap_range_node, node);
579 if (reg < this->range_min)
580 node = node->rb_left;
581 else if (reg > this->range_max)
582 node = node->rb_right;
590 static void regmap_range_exit(struct regmap *map)
592 struct rb_node *next;
593 struct regmap_range_node *range_node;
595 next = rb_first(&map->range_tree);
597 range_node = rb_entry(next, struct regmap_range_node, node);
598 next = rb_next(&range_node->node);
599 rb_erase(&range_node->node, &map->range_tree);
603 kfree(map->selector_work_buf);
606 static int regmap_set_name(struct regmap *map, const struct regmap_config *config)
609 const char *name = kstrdup_const(config->name, GFP_KERNEL);
614 kfree_const(map->name);
621 int regmap_attach_dev(struct device *dev, struct regmap *map,
622 const struct regmap_config *config)
629 ret = regmap_set_name(map, config);
633 regmap_debugfs_init(map);
635 /* Add a devres resource for dev_get_regmap() */
636 m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL);
638 regmap_debugfs_exit(map);
646 EXPORT_SYMBOL_GPL(regmap_attach_dev);
648 static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus,
649 const struct regmap_config *config)
651 enum regmap_endian endian;
653 /* Retrieve the endianness specification from the regmap config */
654 endian = config->reg_format_endian;
656 /* If the regmap config specified a non-default value, use that */
657 if (endian != REGMAP_ENDIAN_DEFAULT)
660 /* Retrieve the endianness specification from the bus config */
661 if (bus && bus->reg_format_endian_default)
662 endian = bus->reg_format_endian_default;
664 /* If the bus specified a non-default value, use that */
665 if (endian != REGMAP_ENDIAN_DEFAULT)
668 /* Use this if no other value was found */
669 return REGMAP_ENDIAN_BIG;
672 enum regmap_endian regmap_get_val_endian(struct device *dev,
673 const struct regmap_bus *bus,
674 const struct regmap_config *config)
676 struct fwnode_handle *fwnode = dev ? dev_fwnode(dev) : NULL;
677 enum regmap_endian endian;
679 /* Retrieve the endianness specification from the regmap config */
680 endian = config->val_format_endian;
682 /* If the regmap config specified a non-default value, use that */
683 if (endian != REGMAP_ENDIAN_DEFAULT)
686 /* If the firmware node exist try to get endianness from it */
687 if (fwnode_property_read_bool(fwnode, "big-endian"))
688 endian = REGMAP_ENDIAN_BIG;
689 else if (fwnode_property_read_bool(fwnode, "little-endian"))
690 endian = REGMAP_ENDIAN_LITTLE;
691 else if (fwnode_property_read_bool(fwnode, "native-endian"))
692 endian = REGMAP_ENDIAN_NATIVE;
694 /* If the endianness was specified in fwnode, use that */
695 if (endian != REGMAP_ENDIAN_DEFAULT)
698 /* Retrieve the endianness specification from the bus config */
699 if (bus && bus->val_format_endian_default)
700 endian = bus->val_format_endian_default;
702 /* If the bus specified a non-default value, use that */
703 if (endian != REGMAP_ENDIAN_DEFAULT)
706 /* Use this if no other value was found */
707 return REGMAP_ENDIAN_BIG;
709 EXPORT_SYMBOL_GPL(regmap_get_val_endian);
711 struct regmap *__regmap_init(struct device *dev,
712 const struct regmap_bus *bus,
714 const struct regmap_config *config,
715 struct lock_class_key *lock_key,
716 const char *lock_name)
720 enum regmap_endian reg_endian, val_endian;
726 map = kzalloc(sizeof(*map), GFP_KERNEL);
732 ret = regmap_set_name(map, config);
736 ret = -EINVAL; /* Later error paths rely on this */
738 if (config->disable_locking) {
739 map->lock = map->unlock = regmap_lock_unlock_none;
740 map->can_sleep = config->can_sleep;
741 regmap_debugfs_disable(map);
742 } else if (config->lock && config->unlock) {
743 map->lock = config->lock;
744 map->unlock = config->unlock;
745 map->lock_arg = config->lock_arg;
746 map->can_sleep = config->can_sleep;
747 } else if (config->use_hwlock) {
748 map->hwlock = hwspin_lock_request_specific(config->hwlock_id);
754 switch (config->hwlock_mode) {
755 case HWLOCK_IRQSTATE:
756 map->lock = regmap_lock_hwlock_irqsave;
757 map->unlock = regmap_unlock_hwlock_irqrestore;
760 map->lock = regmap_lock_hwlock_irq;
761 map->unlock = regmap_unlock_hwlock_irq;
764 map->lock = regmap_lock_hwlock;
765 map->unlock = regmap_unlock_hwlock;
771 if ((bus && bus->fast_io) ||
773 spin_lock_init(&map->spinlock);
774 map->lock = regmap_lock_spinlock;
775 map->unlock = regmap_unlock_spinlock;
776 lockdep_set_class_and_name(&map->spinlock,
777 lock_key, lock_name);
779 mutex_init(&map->mutex);
780 map->lock = regmap_lock_mutex;
781 map->unlock = regmap_unlock_mutex;
782 map->can_sleep = true;
783 lockdep_set_class_and_name(&map->mutex,
784 lock_key, lock_name);
790 * When we write in fast-paths with regmap_bulk_write() don't allocate
791 * scratch buffers with sleeping allocations.
793 if ((bus && bus->fast_io) || config->fast_io)
794 map->alloc_flags = GFP_ATOMIC;
796 map->alloc_flags = GFP_KERNEL;
798 map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
799 map->format.pad_bytes = config->pad_bits / 8;
800 map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8);
801 map->format.buf_size = DIV_ROUND_UP(config->reg_bits +
802 config->val_bits + config->pad_bits, 8);
803 map->reg_shift = config->pad_bits % 8;
804 if (config->reg_stride)
805 map->reg_stride = config->reg_stride;
808 if (is_power_of_2(map->reg_stride))
809 map->reg_stride_order = ilog2(map->reg_stride);
811 map->reg_stride_order = -1;
812 map->use_single_read = config->use_single_read || !bus || !bus->read;
813 map->use_single_write = config->use_single_write || !bus || !bus->write;
814 map->can_multi_write = config->can_multi_write && bus && bus->write;
816 map->max_raw_read = bus->max_raw_read;
817 map->max_raw_write = bus->max_raw_write;
821 map->bus_context = bus_context;
822 map->max_register = config->max_register;
823 map->wr_table = config->wr_table;
824 map->rd_table = config->rd_table;
825 map->volatile_table = config->volatile_table;
826 map->precious_table = config->precious_table;
827 map->wr_noinc_table = config->wr_noinc_table;
828 map->rd_noinc_table = config->rd_noinc_table;
829 map->writeable_reg = config->writeable_reg;
830 map->readable_reg = config->readable_reg;
831 map->volatile_reg = config->volatile_reg;
832 map->precious_reg = config->precious_reg;
833 map->writeable_noinc_reg = config->writeable_noinc_reg;
834 map->readable_noinc_reg = config->readable_noinc_reg;
835 map->cache_type = config->cache_type;
837 spin_lock_init(&map->async_lock);
838 INIT_LIST_HEAD(&map->async_list);
839 INIT_LIST_HEAD(&map->async_free);
840 init_waitqueue_head(&map->async_waitq);
842 if (config->read_flag_mask ||
843 config->write_flag_mask ||
844 config->zero_flag_mask) {
845 map->read_flag_mask = config->read_flag_mask;
846 map->write_flag_mask = config->write_flag_mask;
848 map->read_flag_mask = bus->read_flag_mask;
852 map->reg_read = config->reg_read;
853 map->reg_write = config->reg_write;
855 map->defer_caching = false;
856 goto skip_format_initialization;
857 } else if (!bus->read || !bus->write) {
858 map->reg_read = _regmap_bus_reg_read;
859 map->reg_write = _regmap_bus_reg_write;
860 map->reg_update_bits = bus->reg_update_bits;
862 map->defer_caching = false;
863 goto skip_format_initialization;
865 map->reg_read = _regmap_bus_read;
866 map->reg_update_bits = bus->reg_update_bits;
869 reg_endian = regmap_get_reg_endian(bus, config);
870 val_endian = regmap_get_val_endian(dev, bus, config);
872 switch (config->reg_bits + map->reg_shift) {
874 switch (config->val_bits) {
876 map->format.format_write = regmap_format_2_6_write;
884 switch (config->val_bits) {
886 map->format.format_write = regmap_format_4_12_write;
894 switch (config->val_bits) {
896 map->format.format_write = regmap_format_7_9_write;
899 map->format.format_write = regmap_format_7_17_write;
907 switch (config->val_bits) {
909 map->format.format_write = regmap_format_10_14_write;
917 switch (config->val_bits) {
919 map->format.format_write = regmap_format_12_20_write;
927 map->format.format_reg = regmap_format_8;
931 switch (reg_endian) {
932 case REGMAP_ENDIAN_BIG:
933 map->format.format_reg = regmap_format_16_be;
935 case REGMAP_ENDIAN_LITTLE:
936 map->format.format_reg = regmap_format_16_le;
938 case REGMAP_ENDIAN_NATIVE:
939 map->format.format_reg = regmap_format_16_native;
947 if (reg_endian != REGMAP_ENDIAN_BIG)
949 map->format.format_reg = regmap_format_24;
953 switch (reg_endian) {
954 case REGMAP_ENDIAN_BIG:
955 map->format.format_reg = regmap_format_32_be;
957 case REGMAP_ENDIAN_LITTLE:
958 map->format.format_reg = regmap_format_32_le;
960 case REGMAP_ENDIAN_NATIVE:
961 map->format.format_reg = regmap_format_32_native;
970 switch (reg_endian) {
971 case REGMAP_ENDIAN_BIG:
972 map->format.format_reg = regmap_format_64_be;
974 case REGMAP_ENDIAN_LITTLE:
975 map->format.format_reg = regmap_format_64_le;
977 case REGMAP_ENDIAN_NATIVE:
978 map->format.format_reg = regmap_format_64_native;
990 if (val_endian == REGMAP_ENDIAN_NATIVE)
991 map->format.parse_inplace = regmap_parse_inplace_noop;
993 switch (config->val_bits) {
995 map->format.format_val = regmap_format_8;
996 map->format.parse_val = regmap_parse_8;
997 map->format.parse_inplace = regmap_parse_inplace_noop;
1000 switch (val_endian) {
1001 case REGMAP_ENDIAN_BIG:
1002 map->format.format_val = regmap_format_16_be;
1003 map->format.parse_val = regmap_parse_16_be;
1004 map->format.parse_inplace = regmap_parse_16_be_inplace;
1006 case REGMAP_ENDIAN_LITTLE:
1007 map->format.format_val = regmap_format_16_le;
1008 map->format.parse_val = regmap_parse_16_le;
1009 map->format.parse_inplace = regmap_parse_16_le_inplace;
1011 case REGMAP_ENDIAN_NATIVE:
1012 map->format.format_val = regmap_format_16_native;
1013 map->format.parse_val = regmap_parse_16_native;
1020 if (val_endian != REGMAP_ENDIAN_BIG)
1022 map->format.format_val = regmap_format_24;
1023 map->format.parse_val = regmap_parse_24;
1026 switch (val_endian) {
1027 case REGMAP_ENDIAN_BIG:
1028 map->format.format_val = regmap_format_32_be;
1029 map->format.parse_val = regmap_parse_32_be;
1030 map->format.parse_inplace = regmap_parse_32_be_inplace;
1032 case REGMAP_ENDIAN_LITTLE:
1033 map->format.format_val = regmap_format_32_le;
1034 map->format.parse_val = regmap_parse_32_le;
1035 map->format.parse_inplace = regmap_parse_32_le_inplace;
1037 case REGMAP_ENDIAN_NATIVE:
1038 map->format.format_val = regmap_format_32_native;
1039 map->format.parse_val = regmap_parse_32_native;
1047 switch (val_endian) {
1048 case REGMAP_ENDIAN_BIG:
1049 map->format.format_val = regmap_format_64_be;
1050 map->format.parse_val = regmap_parse_64_be;
1051 map->format.parse_inplace = regmap_parse_64_be_inplace;
1053 case REGMAP_ENDIAN_LITTLE:
1054 map->format.format_val = regmap_format_64_le;
1055 map->format.parse_val = regmap_parse_64_le;
1056 map->format.parse_inplace = regmap_parse_64_le_inplace;
1058 case REGMAP_ENDIAN_NATIVE:
1059 map->format.format_val = regmap_format_64_native;
1060 map->format.parse_val = regmap_parse_64_native;
1069 if (map->format.format_write) {
1070 if ((reg_endian != REGMAP_ENDIAN_BIG) ||
1071 (val_endian != REGMAP_ENDIAN_BIG))
1073 map->use_single_write = true;
1076 if (!map->format.format_write &&
1077 !(map->format.format_reg && map->format.format_val))
1080 map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL);
1081 if (map->work_buf == NULL) {
1086 if (map->format.format_write) {
1087 map->defer_caching = false;
1088 map->reg_write = _regmap_bus_formatted_write;
1089 } else if (map->format.format_val) {
1090 map->defer_caching = true;
1091 map->reg_write = _regmap_bus_raw_write;
1094 skip_format_initialization:
1096 map->range_tree = RB_ROOT;
1097 for (i = 0; i < config->num_ranges; i++) {
1098 const struct regmap_range_cfg *range_cfg = &config->ranges[i];
1099 struct regmap_range_node *new;
1102 if (range_cfg->range_max < range_cfg->range_min) {
1103 dev_err(map->dev, "Invalid range %d: %d < %d\n", i,
1104 range_cfg->range_max, range_cfg->range_min);
1108 if (range_cfg->range_max > map->max_register) {
1109 dev_err(map->dev, "Invalid range %d: %d > %d\n", i,
1110 range_cfg->range_max, map->max_register);
1114 if (range_cfg->selector_reg > map->max_register) {
1116 "Invalid range %d: selector out of map\n", i);
1120 if (range_cfg->window_len == 0) {
1121 dev_err(map->dev, "Invalid range %d: window_len 0\n",
1126 /* Make sure, that this register range has no selector
1127 or data window within its boundary */
1128 for (j = 0; j < config->num_ranges; j++) {
1129 unsigned sel_reg = config->ranges[j].selector_reg;
1130 unsigned win_min = config->ranges[j].window_start;
1131 unsigned win_max = win_min +
1132 config->ranges[j].window_len - 1;
1134 /* Allow data window inside its own virtual range */
1138 if (range_cfg->range_min <= sel_reg &&
1139 sel_reg <= range_cfg->range_max) {
1141 "Range %d: selector for %d in window\n",
1146 if (!(win_max < range_cfg->range_min ||
1147 win_min > range_cfg->range_max)) {
1149 "Range %d: window for %d in window\n",
1155 new = kzalloc(sizeof(*new), GFP_KERNEL);
1162 new->name = range_cfg->name;
1163 new->range_min = range_cfg->range_min;
1164 new->range_max = range_cfg->range_max;
1165 new->selector_reg = range_cfg->selector_reg;
1166 new->selector_mask = range_cfg->selector_mask;
1167 new->selector_shift = range_cfg->selector_shift;
1168 new->window_start = range_cfg->window_start;
1169 new->window_len = range_cfg->window_len;
1171 if (!_regmap_range_add(map, new)) {
1172 dev_err(map->dev, "Failed to add range %d\n", i);
1177 if (map->selector_work_buf == NULL) {
1178 map->selector_work_buf =
1179 kzalloc(map->format.buf_size, GFP_KERNEL);
1180 if (map->selector_work_buf == NULL) {
1187 ret = regcache_init(map, config);
1192 ret = regmap_attach_dev(dev, map, config);
1196 regmap_debugfs_init(map);
1204 regmap_range_exit(map);
1205 kfree(map->work_buf);
1208 hwspin_lock_free(map->hwlock);
1210 kfree_const(map->name);
1214 return ERR_PTR(ret);
1216 EXPORT_SYMBOL_GPL(__regmap_init);
1218 static void devm_regmap_release(struct device *dev, void *res)
1220 regmap_exit(*(struct regmap **)res);
1223 struct regmap *__devm_regmap_init(struct device *dev,
1224 const struct regmap_bus *bus,
1226 const struct regmap_config *config,
1227 struct lock_class_key *lock_key,
1228 const char *lock_name)
1230 struct regmap **ptr, *regmap;
1232 ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL);
1234 return ERR_PTR(-ENOMEM);
1236 regmap = __regmap_init(dev, bus, bus_context, config,
1237 lock_key, lock_name);
1238 if (!IS_ERR(regmap)) {
1240 devres_add(dev, ptr);
1247 EXPORT_SYMBOL_GPL(__devm_regmap_init);
1249 static void regmap_field_init(struct regmap_field *rm_field,
1250 struct regmap *regmap, struct reg_field reg_field)
1252 rm_field->regmap = regmap;
1253 rm_field->reg = reg_field.reg;
1254 rm_field->shift = reg_field.lsb;
1255 rm_field->mask = GENMASK(reg_field.msb, reg_field.lsb);
1256 rm_field->id_size = reg_field.id_size;
1257 rm_field->id_offset = reg_field.id_offset;
1261 * devm_regmap_field_alloc() - Allocate and initialise a register field.
1263 * @dev: Device that will be interacted with
1264 * @regmap: regmap bank in which this register field is located.
1265 * @reg_field: Register field with in the bank.
1267 * The return value will be an ERR_PTR() on error or a valid pointer
1268 * to a struct regmap_field. The regmap_field will be automatically freed
1269 * by the device management code.
1271 struct regmap_field *devm_regmap_field_alloc(struct device *dev,
1272 struct regmap *regmap, struct reg_field reg_field)
1274 struct regmap_field *rm_field = devm_kzalloc(dev,
1275 sizeof(*rm_field), GFP_KERNEL);
1277 return ERR_PTR(-ENOMEM);
1279 regmap_field_init(rm_field, regmap, reg_field);
1284 EXPORT_SYMBOL_GPL(devm_regmap_field_alloc);
1288 * regmap_field_bulk_alloc() - Allocate and initialise a bulk register field.
1290 * @regmap: regmap bank in which this register field is located.
1291 * @rm_field: regmap register fields within the bank.
1292 * @reg_field: Register fields within the bank.
1293 * @num_fields: Number of register fields.
1295 * The return value will be an -ENOMEM on error or zero for success.
1296 * Newly allocated regmap_fields should be freed by calling
1297 * regmap_field_bulk_free()
1299 int regmap_field_bulk_alloc(struct regmap *regmap,
1300 struct regmap_field **rm_field,
1301 struct reg_field *reg_field,
1304 struct regmap_field *rf;
1307 rf = kcalloc(num_fields, sizeof(*rf), GFP_KERNEL);
1311 for (i = 0; i < num_fields; i++) {
1312 regmap_field_init(&rf[i], regmap, reg_field[i]);
1313 rm_field[i] = &rf[i];
1318 EXPORT_SYMBOL_GPL(regmap_field_bulk_alloc);
1321 * devm_regmap_field_bulk_alloc() - Allocate and initialise a bulk register
1324 * @dev: Device that will be interacted with
1325 * @regmap: regmap bank in which this register field is located.
1326 * @rm_field: regmap register fields within the bank.
1327 * @reg_field: Register fields within the bank.
1328 * @num_fields: Number of register fields.
1330 * The return value will be an -ENOMEM on error or zero for success.
1331 * Newly allocated regmap_fields will be automatically freed by the
1332 * device management code.
1334 int devm_regmap_field_bulk_alloc(struct device *dev,
1335 struct regmap *regmap,
1336 struct regmap_field **rm_field,
1337 struct reg_field *reg_field,
1340 struct regmap_field *rf;
1343 rf = devm_kcalloc(dev, num_fields, sizeof(*rf), GFP_KERNEL);
1347 for (i = 0; i < num_fields; i++) {
1348 regmap_field_init(&rf[i], regmap, reg_field[i]);
1349 rm_field[i] = &rf[i];
1354 EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_alloc);
1357 * regmap_field_bulk_free() - Free register field allocated using
1358 * regmap_field_bulk_alloc.
1360 * @field: regmap fields which should be freed.
1362 void regmap_field_bulk_free(struct regmap_field *field)
1366 EXPORT_SYMBOL_GPL(regmap_field_bulk_free);
1369 * devm_regmap_field_bulk_free() - Free a bulk register field allocated using
1370 * devm_regmap_field_bulk_alloc.
1372 * @dev: Device that will be interacted with
1373 * @field: regmap field which should be freed.
1375 * Free register field allocated using devm_regmap_field_bulk_alloc(). Usually
1376 * drivers need not call this function, as the memory allocated via devm
1377 * will be freed as per device-driver life-cycle.
1379 void devm_regmap_field_bulk_free(struct device *dev,
1380 struct regmap_field *field)
1382 devm_kfree(dev, field);
1384 EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_free);
1387 * devm_regmap_field_free() - Free a register field allocated using
1388 * devm_regmap_field_alloc.
1390 * @dev: Device that will be interacted with
1391 * @field: regmap field which should be freed.
1393 * Free register field allocated using devm_regmap_field_alloc(). Usually
1394 * drivers need not call this function, as the memory allocated via devm
1395 * will be freed as per device-driver life-cyle.
1397 void devm_regmap_field_free(struct device *dev,
1398 struct regmap_field *field)
1400 devm_kfree(dev, field);
1402 EXPORT_SYMBOL_GPL(devm_regmap_field_free);
1405 * regmap_field_alloc() - Allocate and initialise a register field.
1407 * @regmap: regmap bank in which this register field is located.
1408 * @reg_field: Register field with in the bank.
1410 * The return value will be an ERR_PTR() on error or a valid pointer
1411 * to a struct regmap_field. The regmap_field should be freed by the
1412 * user once its finished working with it using regmap_field_free().
1414 struct regmap_field *regmap_field_alloc(struct regmap *regmap,
1415 struct reg_field reg_field)
1417 struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL);
1420 return ERR_PTR(-ENOMEM);
1422 regmap_field_init(rm_field, regmap, reg_field);
1426 EXPORT_SYMBOL_GPL(regmap_field_alloc);
1429 * regmap_field_free() - Free register field allocated using
1430 * regmap_field_alloc.
1432 * @field: regmap field which should be freed.
1434 void regmap_field_free(struct regmap_field *field)
1438 EXPORT_SYMBOL_GPL(regmap_field_free);
1441 * regmap_reinit_cache() - Reinitialise the current register cache
1443 * @map: Register map to operate on.
1444 * @config: New configuration. Only the cache data will be used.
1446 * Discard any existing register cache for the map and initialize a
1447 * new cache. This can be used to restore the cache to defaults or to
1448 * update the cache configuration to reflect runtime discovery of the
1451 * No explicit locking is done here, the user needs to ensure that
1452 * this function will not race with other calls to regmap.
1454 int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
1459 regmap_debugfs_exit(map);
1461 map->max_register = config->max_register;
1462 map->writeable_reg = config->writeable_reg;
1463 map->readable_reg = config->readable_reg;
1464 map->volatile_reg = config->volatile_reg;
1465 map->precious_reg = config->precious_reg;
1466 map->writeable_noinc_reg = config->writeable_noinc_reg;
1467 map->readable_noinc_reg = config->readable_noinc_reg;
1468 map->cache_type = config->cache_type;
1470 ret = regmap_set_name(map, config);
1474 regmap_debugfs_init(map);
1476 map->cache_bypass = false;
1477 map->cache_only = false;
1479 return regcache_init(map, config);
1481 EXPORT_SYMBOL_GPL(regmap_reinit_cache);
1484 * regmap_exit() - Free a previously allocated register map
1486 * @map: Register map to operate on.
1488 void regmap_exit(struct regmap *map)
1490 struct regmap_async *async;
1493 regmap_debugfs_exit(map);
1494 regmap_range_exit(map);
1495 if (map->bus && map->bus->free_context)
1496 map->bus->free_context(map->bus_context);
1497 kfree(map->work_buf);
1498 while (!list_empty(&map->async_free)) {
1499 async = list_first_entry_or_null(&map->async_free,
1500 struct regmap_async,
1502 list_del(&async->list);
1503 kfree(async->work_buf);
1507 hwspin_lock_free(map->hwlock);
1508 if (map->lock == regmap_lock_mutex)
1509 mutex_destroy(&map->mutex);
1510 kfree_const(map->name);
1512 if (map->bus && map->bus->free_on_exit)
1516 EXPORT_SYMBOL_GPL(regmap_exit);
1518 static int dev_get_regmap_match(struct device *dev, void *res, void *data)
1520 struct regmap **r = res;
1526 /* If the user didn't specify a name match any */
1528 return !strcmp((*r)->name, data);
1534 * dev_get_regmap() - Obtain the regmap (if any) for a device
1536 * @dev: Device to retrieve the map for
1537 * @name: Optional name for the register map, usually NULL.
1539 * Returns the regmap for the device if one is present, or NULL. If
1540 * name is specified then it must match the name specified when
1541 * registering the device, if it is NULL then the first regmap found
1542 * will be used. Devices with multiple register maps are very rare,
1543 * generic code should normally not need to specify a name.
1545 struct regmap *dev_get_regmap(struct device *dev, const char *name)
1547 struct regmap **r = devres_find(dev, dev_get_regmap_release,
1548 dev_get_regmap_match, (void *)name);
1554 EXPORT_SYMBOL_GPL(dev_get_regmap);
1557 * regmap_get_device() - Obtain the device from a regmap
1559 * @map: Register map to operate on.
1561 * Returns the underlying device that the regmap has been created for.
1563 struct device *regmap_get_device(struct regmap *map)
1567 EXPORT_SYMBOL_GPL(regmap_get_device);
1569 static int _regmap_select_page(struct regmap *map, unsigned int *reg,
1570 struct regmap_range_node *range,
1571 unsigned int val_num)
1573 void *orig_work_buf;
1574 unsigned int win_offset;
1575 unsigned int win_page;
1579 win_offset = (*reg - range->range_min) % range->window_len;
1580 win_page = (*reg - range->range_min) / range->window_len;
1583 /* Bulk write shouldn't cross range boundary */
1584 if (*reg + val_num - 1 > range->range_max)
1587 /* ... or single page boundary */
1588 if (val_num > range->window_len - win_offset)
1592 /* It is possible to have selector register inside data window.
1593 In that case, selector register is located on every page and
1594 it needs no page switching, when accessed alone. */
1596 range->window_start + win_offset != range->selector_reg) {
1597 /* Use separate work_buf during page switching */
1598 orig_work_buf = map->work_buf;
1599 map->work_buf = map->selector_work_buf;
1601 ret = _regmap_update_bits(map, range->selector_reg,
1602 range->selector_mask,
1603 win_page << range->selector_shift,
1606 map->work_buf = orig_work_buf;
1612 *reg = range->window_start + win_offset;
1617 static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes,
1623 if (!mask || !map->work_buf)
1626 buf = map->work_buf;
1628 for (i = 0; i < max_bytes; i++)
1629 buf[i] |= (mask >> (8 * i)) & 0xff;
1632 static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
1633 const void *val, size_t val_len, bool noinc)
1635 struct regmap_range_node *range;
1636 unsigned long flags;
1637 void *work_val = map->work_buf + map->format.reg_bytes +
1638 map->format.pad_bytes;
1640 int ret = -ENOTSUPP;
1646 /* Check for unwritable or noinc registers in range
1649 if (!regmap_writeable_noinc(map, reg)) {
1650 for (i = 0; i < val_len / map->format.val_bytes; i++) {
1651 unsigned int element =
1652 reg + regmap_get_offset(map, i);
1653 if (!regmap_writeable(map, element) ||
1654 regmap_writeable_noinc(map, element))
1659 if (!map->cache_bypass && map->format.parse_val) {
1661 int val_bytes = map->format.val_bytes;
1662 for (i = 0; i < val_len / val_bytes; i++) {
1663 ival = map->format.parse_val(val + (i * val_bytes));
1664 ret = regcache_write(map,
1665 reg + regmap_get_offset(map, i),
1669 "Error in caching of register: %x ret: %d\n",
1674 if (map->cache_only) {
1675 map->cache_dirty = true;
1680 range = _regmap_range_lookup(map, reg);
1682 int val_num = val_len / map->format.val_bytes;
1683 int win_offset = (reg - range->range_min) % range->window_len;
1684 int win_residue = range->window_len - win_offset;
1686 /* If the write goes beyond the end of the window split it */
1687 while (val_num > win_residue) {
1688 dev_dbg(map->dev, "Writing window %d/%zu\n",
1689 win_residue, val_len / map->format.val_bytes);
1690 ret = _regmap_raw_write_impl(map, reg, val,
1692 map->format.val_bytes, noinc);
1697 val_num -= win_residue;
1698 val += win_residue * map->format.val_bytes;
1699 val_len -= win_residue * map->format.val_bytes;
1701 win_offset = (reg - range->range_min) %
1703 win_residue = range->window_len - win_offset;
1706 ret = _regmap_select_page(map, ®, range, noinc ? 1 : val_num);
1711 map->format.format_reg(map->work_buf, reg, map->reg_shift);
1712 regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
1713 map->write_flag_mask);
1716 * Essentially all I/O mechanisms will be faster with a single
1717 * buffer to write. Since register syncs often generate raw
1718 * writes of single registers optimise that case.
1720 if (val != work_val && val_len == map->format.val_bytes) {
1721 memcpy(work_val, val, map->format.val_bytes);
1725 if (map->async && map->bus->async_write) {
1726 struct regmap_async *async;
1728 trace_regmap_async_write_start(map, reg, val_len);
1730 spin_lock_irqsave(&map->async_lock, flags);
1731 async = list_first_entry_or_null(&map->async_free,
1732 struct regmap_async,
1735 list_del(&async->list);
1736 spin_unlock_irqrestore(&map->async_lock, flags);
1739 async = map->bus->async_alloc();
1743 async->work_buf = kzalloc(map->format.buf_size,
1744 GFP_KERNEL | GFP_DMA);
1745 if (!async->work_buf) {
1753 /* If the caller supplied the value we can use it safely. */
1754 memcpy(async->work_buf, map->work_buf, map->format.pad_bytes +
1755 map->format.reg_bytes + map->format.val_bytes);
1757 spin_lock_irqsave(&map->async_lock, flags);
1758 list_add_tail(&async->list, &map->async_list);
1759 spin_unlock_irqrestore(&map->async_lock, flags);
1761 if (val != work_val)
1762 ret = map->bus->async_write(map->bus_context,
1764 map->format.reg_bytes +
1765 map->format.pad_bytes,
1766 val, val_len, async);
1768 ret = map->bus->async_write(map->bus_context,
1770 map->format.reg_bytes +
1771 map->format.pad_bytes +
1772 val_len, NULL, 0, async);
1775 dev_err(map->dev, "Failed to schedule write: %d\n",
1778 spin_lock_irqsave(&map->async_lock, flags);
1779 list_move(&async->list, &map->async_free);
1780 spin_unlock_irqrestore(&map->async_lock, flags);
1786 trace_regmap_hw_write_start(map, reg, val_len / map->format.val_bytes);
1788 /* If we're doing a single register write we can probably just
1789 * send the work_buf directly, otherwise try to do a gather
1792 if (val == work_val)
1793 ret = map->bus->write(map->bus_context, map->work_buf,
1794 map->format.reg_bytes +
1795 map->format.pad_bytes +
1797 else if (map->bus->gather_write)
1798 ret = map->bus->gather_write(map->bus_context, map->work_buf,
1799 map->format.reg_bytes +
1800 map->format.pad_bytes,
1805 /* If that didn't work fall back on linearising by hand. */
1806 if (ret == -ENOTSUPP) {
1807 len = map->format.reg_bytes + map->format.pad_bytes + val_len;
1808 buf = kzalloc(len, GFP_KERNEL);
1812 memcpy(buf, map->work_buf, map->format.reg_bytes);
1813 memcpy(buf + map->format.reg_bytes + map->format.pad_bytes,
1815 ret = map->bus->write(map->bus_context, buf, len);
1818 } else if (ret != 0 && !map->cache_bypass && map->format.parse_val) {
1819 /* regcache_drop_region() takes lock that we already have,
1820 * thus call map->cache_ops->drop() directly
1822 if (map->cache_ops && map->cache_ops->drop)
1823 map->cache_ops->drop(map, reg, reg + 1);
1826 trace_regmap_hw_write_done(map, reg, val_len / map->format.val_bytes);
1832 * regmap_can_raw_write - Test if regmap_raw_write() is supported
1834 * @map: Map to check.
1836 bool regmap_can_raw_write(struct regmap *map)
1838 return map->bus && map->bus->write && map->format.format_val &&
1839 map->format.format_reg;
1841 EXPORT_SYMBOL_GPL(regmap_can_raw_write);
1844 * regmap_get_raw_read_max - Get the maximum size we can read
1846 * @map: Map to check.
1848 size_t regmap_get_raw_read_max(struct regmap *map)
1850 return map->max_raw_read;
1852 EXPORT_SYMBOL_GPL(regmap_get_raw_read_max);
1855 * regmap_get_raw_write_max - Get the maximum size we can read
1857 * @map: Map to check.
1859 size_t regmap_get_raw_write_max(struct regmap *map)
1861 return map->max_raw_write;
1863 EXPORT_SYMBOL_GPL(regmap_get_raw_write_max);
1865 static int _regmap_bus_formatted_write(void *context, unsigned int reg,
1869 struct regmap_range_node *range;
1870 struct regmap *map = context;
1872 WARN_ON(!map->bus || !map->format.format_write);
1874 range = _regmap_range_lookup(map, reg);
1876 ret = _regmap_select_page(map, ®, range, 1);
1881 map->format.format_write(map, reg, val);
1883 trace_regmap_hw_write_start(map, reg, 1);
1885 ret = map->bus->write(map->bus_context, map->work_buf,
1886 map->format.buf_size);
1888 trace_regmap_hw_write_done(map, reg, 1);
1893 static int _regmap_bus_reg_write(void *context, unsigned int reg,
1896 struct regmap *map = context;
1898 return map->bus->reg_write(map->bus_context, reg, val);
1901 static int _regmap_bus_raw_write(void *context, unsigned int reg,
1904 struct regmap *map = context;
1906 WARN_ON(!map->bus || !map->format.format_val);
1908 map->format.format_val(map->work_buf + map->format.reg_bytes
1909 + map->format.pad_bytes, val, 0);
1910 return _regmap_raw_write_impl(map, reg,
1912 map->format.reg_bytes +
1913 map->format.pad_bytes,
1914 map->format.val_bytes,
1918 static inline void *_regmap_map_get_context(struct regmap *map)
1920 return (map->bus) ? map : map->bus_context;
1923 int _regmap_write(struct regmap *map, unsigned int reg,
1927 void *context = _regmap_map_get_context(map);
1929 if (!regmap_writeable(map, reg))
1932 if (!map->cache_bypass && !map->defer_caching) {
1933 ret = regcache_write(map, reg, val);
1936 if (map->cache_only) {
1937 map->cache_dirty = true;
1942 ret = map->reg_write(context, reg, val);
1944 if (regmap_should_log(map))
1945 dev_info(map->dev, "%x <= %x\n", reg, val);
1947 trace_regmap_reg_write(map, reg, val);
1954 * regmap_write() - Write a value to a single register
1956 * @map: Register map to write to
1957 * @reg: Register to write to
1958 * @val: Value to be written
1960 * A value of zero will be returned on success, a negative errno will
1961 * be returned in error cases.
1963 int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
1967 if (!IS_ALIGNED(reg, map->reg_stride))
1970 map->lock(map->lock_arg);
1972 ret = _regmap_write(map, reg, val);
1974 map->unlock(map->lock_arg);
1978 EXPORT_SYMBOL_GPL(regmap_write);
1981 * regmap_write_async() - Write a value to a single register asynchronously
1983 * @map: Register map to write to
1984 * @reg: Register to write to
1985 * @val: Value to be written
1987 * A value of zero will be returned on success, a negative errno will
1988 * be returned in error cases.
1990 int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val)
1994 if (!IS_ALIGNED(reg, map->reg_stride))
1997 map->lock(map->lock_arg);
2001 ret = _regmap_write(map, reg, val);
2005 map->unlock(map->lock_arg);
2009 EXPORT_SYMBOL_GPL(regmap_write_async);
2011 int _regmap_raw_write(struct regmap *map, unsigned int reg,
2012 const void *val, size_t val_len, bool noinc)
2014 size_t val_bytes = map->format.val_bytes;
2015 size_t val_count = val_len / val_bytes;
2016 size_t chunk_count, chunk_bytes;
2017 size_t chunk_regs = val_count;
2023 if (map->use_single_write)
2025 else if (map->max_raw_write && val_len > map->max_raw_write)
2026 chunk_regs = map->max_raw_write / val_bytes;
2028 chunk_count = val_count / chunk_regs;
2029 chunk_bytes = chunk_regs * val_bytes;
2031 /* Write as many bytes as possible with chunk_size */
2032 for (i = 0; i < chunk_count; i++) {
2033 ret = _regmap_raw_write_impl(map, reg, val, chunk_bytes, noinc);
2037 reg += regmap_get_offset(map, chunk_regs);
2039 val_len -= chunk_bytes;
2042 /* Write remaining bytes */
2044 ret = _regmap_raw_write_impl(map, reg, val, val_len, noinc);
2050 * regmap_raw_write() - Write raw values to one or more registers
2052 * @map: Register map to write to
2053 * @reg: Initial register to write to
2054 * @val: Block of data to be written, laid out for direct transmission to the
2056 * @val_len: Length of data pointed to by val.
2058 * This function is intended to be used for things like firmware
2059 * download where a large block of data needs to be transferred to the
2060 * device. No formatting will be done on the data provided.
2062 * A value of zero will be returned on success, a negative errno will
2063 * be returned in error cases.
2065 int regmap_raw_write(struct regmap *map, unsigned int reg,
2066 const void *val, size_t val_len)
2070 if (!regmap_can_raw_write(map))
2072 if (val_len % map->format.val_bytes)
2075 map->lock(map->lock_arg);
2077 ret = _regmap_raw_write(map, reg, val, val_len, false);
2079 map->unlock(map->lock_arg);
2083 EXPORT_SYMBOL_GPL(regmap_raw_write);
2086 * regmap_noinc_write(): Write data from a register without incrementing the
2089 * @map: Register map to write to
2090 * @reg: Register to write to
2091 * @val: Pointer to data buffer
2092 * @val_len: Length of output buffer in bytes.
2094 * The regmap API usually assumes that bulk bus write operations will write a
2095 * range of registers. Some devices have certain registers for which a write
2096 * operation can write to an internal FIFO.
2098 * The target register must be volatile but registers after it can be
2099 * completely unrelated cacheable registers.
2101 * This will attempt multiple writes as required to write val_len bytes.
2103 * A value of zero will be returned on success, a negative errno will be
2104 * returned in error cases.
2106 int regmap_noinc_write(struct regmap *map, unsigned int reg,
2107 const void *val, size_t val_len)
2114 if (!map->bus->write)
2116 if (val_len % map->format.val_bytes)
2118 if (!IS_ALIGNED(reg, map->reg_stride))
2123 map->lock(map->lock_arg);
2125 if (!regmap_volatile(map, reg) || !regmap_writeable_noinc(map, reg)) {
2131 if (map->max_raw_write && map->max_raw_write < val_len)
2132 write_len = map->max_raw_write;
2134 write_len = val_len;
2135 ret = _regmap_raw_write(map, reg, val, write_len, true);
2138 val = ((u8 *)val) + write_len;
2139 val_len -= write_len;
2143 map->unlock(map->lock_arg);
2146 EXPORT_SYMBOL_GPL(regmap_noinc_write);
2149 * regmap_field_update_bits_base() - Perform a read/modify/write cycle a
2152 * @field: Register field to write to
2153 * @mask: Bitmask to change
2154 * @val: Value to be written
2155 * @change: Boolean indicating if a write was done
2156 * @async: Boolean indicating asynchronously
2157 * @force: Boolean indicating use force update
2159 * Perform a read/modify/write cycle on the register field with change,
2160 * async, force option.
2162 * A value of zero will be returned on success, a negative errno will
2163 * be returned in error cases.
2165 int regmap_field_update_bits_base(struct regmap_field *field,
2166 unsigned int mask, unsigned int val,
2167 bool *change, bool async, bool force)
2169 mask = (mask << field->shift) & field->mask;
2171 return regmap_update_bits_base(field->regmap, field->reg,
2172 mask, val << field->shift,
2173 change, async, force);
2175 EXPORT_SYMBOL_GPL(regmap_field_update_bits_base);
2178 * regmap_fields_update_bits_base() - Perform a read/modify/write cycle a
2179 * register field with port ID
2181 * @field: Register field to write to
2183 * @mask: Bitmask to change
2184 * @val: Value to be written
2185 * @change: Boolean indicating if a write was done
2186 * @async: Boolean indicating asynchronously
2187 * @force: Boolean indicating use force update
2189 * A value of zero will be returned on success, a negative errno will
2190 * be returned in error cases.
2192 int regmap_fields_update_bits_base(struct regmap_field *field, unsigned int id,
2193 unsigned int mask, unsigned int val,
2194 bool *change, bool async, bool force)
2196 if (id >= field->id_size)
2199 mask = (mask << field->shift) & field->mask;
2201 return regmap_update_bits_base(field->regmap,
2202 field->reg + (field->id_offset * id),
2203 mask, val << field->shift,
2204 change, async, force);
2206 EXPORT_SYMBOL_GPL(regmap_fields_update_bits_base);
2209 * regmap_bulk_write() - Write multiple registers to the device
2211 * @map: Register map to write to
2212 * @reg: First register to be write from
2213 * @val: Block of data to be written, in native register size for device
2214 * @val_count: Number of registers to write
2216 * This function is intended to be used for writing a large block of
2217 * data to the device either in single transfer or multiple transfer.
2219 * A value of zero will be returned on success, a negative errno will
2220 * be returned in error cases.
2222 int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
2226 size_t val_bytes = map->format.val_bytes;
2228 if (!IS_ALIGNED(reg, map->reg_stride))
2232 * Some devices don't support bulk write, for them we have a series of
2233 * single write operations.
2235 if (!map->bus || !map->format.parse_inplace) {
2236 map->lock(map->lock_arg);
2237 for (i = 0; i < val_count; i++) {
2240 switch (val_bytes) {
2242 ival = *(u8 *)(val + (i * val_bytes));
2245 ival = *(u16 *)(val + (i * val_bytes));
2248 ival = *(u32 *)(val + (i * val_bytes));
2252 ival = *(u64 *)(val + (i * val_bytes));
2260 ret = _regmap_write(map,
2261 reg + regmap_get_offset(map, i),
2267 map->unlock(map->lock_arg);
2271 wval = kmemdup(val, val_count * val_bytes, map->alloc_flags);
2275 for (i = 0; i < val_count * val_bytes; i += val_bytes)
2276 map->format.parse_inplace(wval + i);
2278 ret = regmap_raw_write(map, reg, wval, val_bytes * val_count);
2284 EXPORT_SYMBOL_GPL(regmap_bulk_write);
2287 * _regmap_raw_multi_reg_write()
2289 * the (register,newvalue) pairs in regs have not been formatted, but
2290 * they are all in the same page and have been changed to being page
2291 * relative. The page register has been written if that was necessary.
2293 static int _regmap_raw_multi_reg_write(struct regmap *map,
2294 const struct reg_sequence *regs,
2301 size_t val_bytes = map->format.val_bytes;
2302 size_t reg_bytes = map->format.reg_bytes;
2303 size_t pad_bytes = map->format.pad_bytes;
2304 size_t pair_size = reg_bytes + pad_bytes + val_bytes;
2305 size_t len = pair_size * num_regs;
2310 buf = kzalloc(len, GFP_KERNEL);
2314 /* We have to linearise by hand. */
2318 for (i = 0; i < num_regs; i++) {
2319 unsigned int reg = regs[i].reg;
2320 unsigned int val = regs[i].def;
2321 trace_regmap_hw_write_start(map, reg, 1);
2322 map->format.format_reg(u8, reg, map->reg_shift);
2323 u8 += reg_bytes + pad_bytes;
2324 map->format.format_val(u8, val, 0);
2328 *u8 |= map->write_flag_mask;
2330 ret = map->bus->write(map->bus_context, buf, len);
2334 for (i = 0; i < num_regs; i++) {
2335 int reg = regs[i].reg;
2336 trace_regmap_hw_write_done(map, reg, 1);
2341 static unsigned int _regmap_register_page(struct regmap *map,
2343 struct regmap_range_node *range)
2345 unsigned int win_page = (reg - range->range_min) / range->window_len;
2350 static int _regmap_range_multi_paged_reg_write(struct regmap *map,
2351 struct reg_sequence *regs,
2356 struct reg_sequence *base;
2357 unsigned int this_page = 0;
2358 unsigned int page_change = 0;
2360 * the set of registers are not neccessarily in order, but
2361 * since the order of write must be preserved this algorithm
2362 * chops the set each time the page changes. This also applies
2363 * if there is a delay required at any point in the sequence.
2366 for (i = 0, n = 0; i < num_regs; i++, n++) {
2367 unsigned int reg = regs[i].reg;
2368 struct regmap_range_node *range;
2370 range = _regmap_range_lookup(map, reg);
2372 unsigned int win_page = _regmap_register_page(map, reg,
2376 this_page = win_page;
2377 if (win_page != this_page) {
2378 this_page = win_page;
2383 /* If we have both a page change and a delay make sure to
2384 * write the regs and apply the delay before we change the
2388 if (page_change || regs[i].delay_us) {
2390 /* For situations where the first write requires
2391 * a delay we need to make sure we don't call
2392 * raw_multi_reg_write with n=0
2393 * This can't occur with page breaks as we
2394 * never write on the first iteration
2396 if (regs[i].delay_us && i == 0)
2399 ret = _regmap_raw_multi_reg_write(map, base, n);
2403 if (regs[i].delay_us) {
2405 fsleep(regs[i].delay_us);
2407 udelay(regs[i].delay_us);
2414 ret = _regmap_select_page(map,
2427 return _regmap_raw_multi_reg_write(map, base, n);
2431 static int _regmap_multi_reg_write(struct regmap *map,
2432 const struct reg_sequence *regs,
2438 if (!map->can_multi_write) {
2439 for (i = 0; i < num_regs; i++) {
2440 ret = _regmap_write(map, regs[i].reg, regs[i].def);
2444 if (regs[i].delay_us) {
2446 fsleep(regs[i].delay_us);
2448 udelay(regs[i].delay_us);
2454 if (!map->format.parse_inplace)
2457 if (map->writeable_reg)
2458 for (i = 0; i < num_regs; i++) {
2459 int reg = regs[i].reg;
2460 if (!map->writeable_reg(map->dev, reg))
2462 if (!IS_ALIGNED(reg, map->reg_stride))
2466 if (!map->cache_bypass) {
2467 for (i = 0; i < num_regs; i++) {
2468 unsigned int val = regs[i].def;
2469 unsigned int reg = regs[i].reg;
2470 ret = regcache_write(map, reg, val);
2473 "Error in caching of register: %x ret: %d\n",
2478 if (map->cache_only) {
2479 map->cache_dirty = true;
2486 for (i = 0; i < num_regs; i++) {
2487 unsigned int reg = regs[i].reg;
2488 struct regmap_range_node *range;
2490 /* Coalesce all the writes between a page break or a delay
2493 range = _regmap_range_lookup(map, reg);
2494 if (range || regs[i].delay_us) {
2495 size_t len = sizeof(struct reg_sequence)*num_regs;
2496 struct reg_sequence *base = kmemdup(regs, len,
2500 ret = _regmap_range_multi_paged_reg_write(map, base,
2507 return _regmap_raw_multi_reg_write(map, regs, num_regs);
2511 * regmap_multi_reg_write() - Write multiple registers to the device
2513 * @map: Register map to write to
2514 * @regs: Array of structures containing register,value to be written
2515 * @num_regs: Number of registers to write
2517 * Write multiple registers to the device where the set of register, value
2518 * pairs are supplied in any order, possibly not all in a single range.
2520 * The 'normal' block write mode will send ultimately send data on the
2521 * target bus as R,V1,V2,V3,..,Vn where successively higher registers are
2522 * addressed. However, this alternative block multi write mode will send
2523 * the data as R1,V1,R2,V2,..,Rn,Vn on the target bus. The target device
2524 * must of course support the mode.
2526 * A value of zero will be returned on success, a negative errno will be
2527 * returned in error cases.
2529 int regmap_multi_reg_write(struct regmap *map, const struct reg_sequence *regs,
2534 map->lock(map->lock_arg);
2536 ret = _regmap_multi_reg_write(map, regs, num_regs);
2538 map->unlock(map->lock_arg);
2542 EXPORT_SYMBOL_GPL(regmap_multi_reg_write);
2545 * regmap_multi_reg_write_bypassed() - Write multiple registers to the
2546 * device but not the cache
2548 * @map: Register map to write to
2549 * @regs: Array of structures containing register,value to be written
2550 * @num_regs: Number of registers to write
2552 * Write multiple registers to the device but not the cache where the set
2553 * of register are supplied in any order.
2555 * This function is intended to be used for writing a large block of data
2556 * atomically to the device in single transfer for those I2C client devices
2557 * that implement this alternative block write mode.
2559 * A value of zero will be returned on success, a negative errno will
2560 * be returned in error cases.
2562 int regmap_multi_reg_write_bypassed(struct regmap *map,
2563 const struct reg_sequence *regs,
2569 map->lock(map->lock_arg);
2571 bypass = map->cache_bypass;
2572 map->cache_bypass = true;
2574 ret = _regmap_multi_reg_write(map, regs, num_regs);
2576 map->cache_bypass = bypass;
2578 map->unlock(map->lock_arg);
2582 EXPORT_SYMBOL_GPL(regmap_multi_reg_write_bypassed);
2585 * regmap_raw_write_async() - Write raw values to one or more registers
2588 * @map: Register map to write to
2589 * @reg: Initial register to write to
2590 * @val: Block of data to be written, laid out for direct transmission to the
2591 * device. Must be valid until regmap_async_complete() is called.
2592 * @val_len: Length of data pointed to by val.
2594 * This function is intended to be used for things like firmware
2595 * download where a large block of data needs to be transferred to the
2596 * device. No formatting will be done on the data provided.
2598 * If supported by the underlying bus the write will be scheduled
2599 * asynchronously, helping maximise I/O speed on higher speed buses
2600 * like SPI. regmap_async_complete() can be called to ensure that all
2601 * asynchrnous writes have been completed.
2603 * A value of zero will be returned on success, a negative errno will
2604 * be returned in error cases.
2606 int regmap_raw_write_async(struct regmap *map, unsigned int reg,
2607 const void *val, size_t val_len)
2611 if (val_len % map->format.val_bytes)
2613 if (!IS_ALIGNED(reg, map->reg_stride))
2616 map->lock(map->lock_arg);
2620 ret = _regmap_raw_write(map, reg, val, val_len, false);
2624 map->unlock(map->lock_arg);
2628 EXPORT_SYMBOL_GPL(regmap_raw_write_async);
2630 static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
2631 unsigned int val_len, bool noinc)
2633 struct regmap_range_node *range;
2638 if (!map->bus || !map->bus->read)
2641 range = _regmap_range_lookup(map, reg);
2643 ret = _regmap_select_page(map, ®, range,
2644 noinc ? 1 : val_len / map->format.val_bytes);
2649 map->format.format_reg(map->work_buf, reg, map->reg_shift);
2650 regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
2651 map->read_flag_mask);
2652 trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes);
2654 ret = map->bus->read(map->bus_context, map->work_buf,
2655 map->format.reg_bytes + map->format.pad_bytes,
2658 trace_regmap_hw_read_done(map, reg, val_len / map->format.val_bytes);
2663 static int _regmap_bus_reg_read(void *context, unsigned int reg,
2666 struct regmap *map = context;
2668 return map->bus->reg_read(map->bus_context, reg, val);
2671 static int _regmap_bus_read(void *context, unsigned int reg,
2675 struct regmap *map = context;
2676 void *work_val = map->work_buf + map->format.reg_bytes +
2677 map->format.pad_bytes;
2679 if (!map->format.parse_val)
2682 ret = _regmap_raw_read(map, reg, work_val, map->format.val_bytes, false);
2684 *val = map->format.parse_val(work_val);
2689 static int _regmap_read(struct regmap *map, unsigned int reg,
2693 void *context = _regmap_map_get_context(map);
2695 if (!map->cache_bypass) {
2696 ret = regcache_read(map, reg, val);
2701 if (map->cache_only)
2704 if (!regmap_readable(map, reg))
2707 ret = map->reg_read(context, reg, val);
2709 if (regmap_should_log(map))
2710 dev_info(map->dev, "%x => %x\n", reg, *val);
2712 trace_regmap_reg_read(map, reg, *val);
2714 if (!map->cache_bypass)
2715 regcache_write(map, reg, *val);
2722 * regmap_read() - Read a value from a single register
2724 * @map: Register map to read from
2725 * @reg: Register to be read from
2726 * @val: Pointer to store read value
2728 * A value of zero will be returned on success, a negative errno will
2729 * be returned in error cases.
2731 int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
2735 if (!IS_ALIGNED(reg, map->reg_stride))
2738 map->lock(map->lock_arg);
2740 ret = _regmap_read(map, reg, val);
2742 map->unlock(map->lock_arg);
2746 EXPORT_SYMBOL_GPL(regmap_read);
2749 * regmap_raw_read() - Read raw data from the device
2751 * @map: Register map to read from
2752 * @reg: First register to be read from
2753 * @val: Pointer to store read value
2754 * @val_len: Size of data to read
2756 * A value of zero will be returned on success, a negative errno will
2757 * be returned in error cases.
2759 int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
2762 size_t val_bytes = map->format.val_bytes;
2763 size_t val_count = val_len / val_bytes;
2769 if (val_len % map->format.val_bytes)
2771 if (!IS_ALIGNED(reg, map->reg_stride))
2776 map->lock(map->lock_arg);
2778 if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
2779 map->cache_type == REGCACHE_NONE) {
2780 size_t chunk_count, chunk_bytes;
2781 size_t chunk_regs = val_count;
2783 if (!map->bus->read) {
2788 if (map->use_single_read)
2790 else if (map->max_raw_read && val_len > map->max_raw_read)
2791 chunk_regs = map->max_raw_read / val_bytes;
2793 chunk_count = val_count / chunk_regs;
2794 chunk_bytes = chunk_regs * val_bytes;
2796 /* Read bytes that fit into whole chunks */
2797 for (i = 0; i < chunk_count; i++) {
2798 ret = _regmap_raw_read(map, reg, val, chunk_bytes, false);
2802 reg += regmap_get_offset(map, chunk_regs);
2804 val_len -= chunk_bytes;
2807 /* Read remaining bytes */
2809 ret = _regmap_raw_read(map, reg, val, val_len, false);
2814 /* Otherwise go word by word for the cache; should be low
2815 * cost as we expect to hit the cache.
2817 for (i = 0; i < val_count; i++) {
2818 ret = _regmap_read(map, reg + regmap_get_offset(map, i),
2823 map->format.format_val(val + (i * val_bytes), v, 0);
2828 map->unlock(map->lock_arg);
2832 EXPORT_SYMBOL_GPL(regmap_raw_read);
2835 * regmap_noinc_read(): Read data from a register without incrementing the
2838 * @map: Register map to read from
2839 * @reg: Register to read from
2840 * @val: Pointer to data buffer
2841 * @val_len: Length of output buffer in bytes.
2843 * The regmap API usually assumes that bulk bus read operations will read a
2844 * range of registers. Some devices have certain registers for which a read
2845 * operation read will read from an internal FIFO.
2847 * The target register must be volatile but registers after it can be
2848 * completely unrelated cacheable registers.
2850 * This will attempt multiple reads as required to read val_len bytes.
2852 * A value of zero will be returned on success, a negative errno will be
2853 * returned in error cases.
2855 int regmap_noinc_read(struct regmap *map, unsigned int reg,
2856 void *val, size_t val_len)
2863 if (!map->bus->read)
2865 if (val_len % map->format.val_bytes)
2867 if (!IS_ALIGNED(reg, map->reg_stride))
2872 map->lock(map->lock_arg);
2874 if (!regmap_volatile(map, reg) || !regmap_readable_noinc(map, reg)) {
2880 if (map->max_raw_read && map->max_raw_read < val_len)
2881 read_len = map->max_raw_read;
2884 ret = _regmap_raw_read(map, reg, val, read_len, true);
2887 val = ((u8 *)val) + read_len;
2888 val_len -= read_len;
2892 map->unlock(map->lock_arg);
2895 EXPORT_SYMBOL_GPL(regmap_noinc_read);
2898 * regmap_field_read(): Read a value to a single register field
2900 * @field: Register field to read from
2901 * @val: Pointer to store read value
2903 * A value of zero will be returned on success, a negative errno will
2904 * be returned in error cases.
2906 int regmap_field_read(struct regmap_field *field, unsigned int *val)
2909 unsigned int reg_val;
2910 ret = regmap_read(field->regmap, field->reg, ®_val);
2914 reg_val &= field->mask;
2915 reg_val >>= field->shift;
2920 EXPORT_SYMBOL_GPL(regmap_field_read);
2923 * regmap_fields_read() - Read a value to a single register field with port ID
2925 * @field: Register field to read from
2927 * @val: Pointer to store read value
2929 * A value of zero will be returned on success, a negative errno will
2930 * be returned in error cases.
2932 int regmap_fields_read(struct regmap_field *field, unsigned int id,
2936 unsigned int reg_val;
2938 if (id >= field->id_size)
2941 ret = regmap_read(field->regmap,
2942 field->reg + (field->id_offset * id),
2947 reg_val &= field->mask;
2948 reg_val >>= field->shift;
2953 EXPORT_SYMBOL_GPL(regmap_fields_read);
2956 * regmap_bulk_read() - Read multiple registers from the device
2958 * @map: Register map to read from
2959 * @reg: First register to be read from
2960 * @val: Pointer to store read value, in native register size for device
2961 * @val_count: Number of registers to read
2963 * A value of zero will be returned on success, a negative errno will
2964 * be returned in error cases.
2966 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
2970 size_t val_bytes = map->format.val_bytes;
2971 bool vol = regmap_volatile_range(map, reg, val_count);
2973 if (!IS_ALIGNED(reg, map->reg_stride))
2978 if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
2979 ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
2983 for (i = 0; i < val_count * val_bytes; i += val_bytes)
2984 map->format.parse_inplace(val + i);
2993 map->lock(map->lock_arg);
2995 for (i = 0; i < val_count; i++) {
2998 ret = _regmap_read(map, reg + regmap_get_offset(map, i),
3003 switch (map->format.val_bytes) {
3025 map->unlock(map->lock_arg);
3030 EXPORT_SYMBOL_GPL(regmap_bulk_read);
3032 static int _regmap_update_bits(struct regmap *map, unsigned int reg,
3033 unsigned int mask, unsigned int val,
3034 bool *change, bool force_write)
3037 unsigned int tmp, orig;
3042 if (regmap_volatile(map, reg) && map->reg_update_bits) {
3043 ret = map->reg_update_bits(map->bus_context, reg, mask, val);
3044 if (ret == 0 && change)
3047 ret = _regmap_read(map, reg, &orig);
3054 if (force_write || (tmp != orig)) {
3055 ret = _regmap_write(map, reg, tmp);
3056 if (ret == 0 && change)
3065 * regmap_update_bits_base() - Perform a read/modify/write cycle on a register
3067 * @map: Register map to update
3068 * @reg: Register to update
3069 * @mask: Bitmask to change
3070 * @val: New value for bitmask
3071 * @change: Boolean indicating if a write was done
3072 * @async: Boolean indicating asynchronously
3073 * @force: Boolean indicating use force update
3075 * Perform a read/modify/write cycle on a register map with change, async, force
3080 * With most buses the read must be done synchronously so this is most useful
3081 * for devices with a cache which do not need to interact with the hardware to
3082 * determine the current register value.
3084 * Returns zero for success, a negative number on error.
3086 int regmap_update_bits_base(struct regmap *map, unsigned int reg,
3087 unsigned int mask, unsigned int val,
3088 bool *change, bool async, bool force)
3092 map->lock(map->lock_arg);
3096 ret = _regmap_update_bits(map, reg, mask, val, change, force);
3100 map->unlock(map->lock_arg);
3104 EXPORT_SYMBOL_GPL(regmap_update_bits_base);
3107 * regmap_test_bits() - Check if all specified bits are set in a register.
3109 * @map: Register map to operate on
3110 * @reg: Register to read from
3111 * @bits: Bits to test
3113 * Returns 0 if at least one of the tested bits is not set, 1 if all tested
3114 * bits are set and a negative error number if the underlying regmap_read()
3117 int regmap_test_bits(struct regmap *map, unsigned int reg, unsigned int bits)
3119 unsigned int val, ret;
3121 ret = regmap_read(map, reg, &val);
3125 return (val & bits) == bits;
3127 EXPORT_SYMBOL_GPL(regmap_test_bits);
3129 void regmap_async_complete_cb(struct regmap_async *async, int ret)
3131 struct regmap *map = async->map;
3134 trace_regmap_async_io_complete(map);
3136 spin_lock(&map->async_lock);
3137 list_move(&async->list, &map->async_free);
3138 wake = list_empty(&map->async_list);
3141 map->async_ret = ret;
3143 spin_unlock(&map->async_lock);
3146 wake_up(&map->async_waitq);
3148 EXPORT_SYMBOL_GPL(regmap_async_complete_cb);
3150 static int regmap_async_is_done(struct regmap *map)
3152 unsigned long flags;
3155 spin_lock_irqsave(&map->async_lock, flags);
3156 ret = list_empty(&map->async_list);
3157 spin_unlock_irqrestore(&map->async_lock, flags);
3163 * regmap_async_complete - Ensure all asynchronous I/O has completed.
3165 * @map: Map to operate on.
3167 * Blocks until any pending asynchronous I/O has completed. Returns
3168 * an error code for any failed I/O operations.
3170 int regmap_async_complete(struct regmap *map)
3172 unsigned long flags;
3175 /* Nothing to do with no async support */
3176 if (!map->bus || !map->bus->async_write)
3179 trace_regmap_async_complete_start(map);
3181 wait_event(map->async_waitq, regmap_async_is_done(map));
3183 spin_lock_irqsave(&map->async_lock, flags);
3184 ret = map->async_ret;
3186 spin_unlock_irqrestore(&map->async_lock, flags);
3188 trace_regmap_async_complete_done(map);
3192 EXPORT_SYMBOL_GPL(regmap_async_complete);
3195 * regmap_register_patch - Register and apply register updates to be applied
3196 * on device initialistion
3198 * @map: Register map to apply updates to.
3199 * @regs: Values to update.
3200 * @num_regs: Number of entries in regs.
3202 * Register a set of register updates to be applied to the device
3203 * whenever the device registers are synchronised with the cache and
3204 * apply them immediately. Typically this is used to apply
3205 * corrections to be applied to the device defaults on startup, such
3206 * as the updates some vendors provide to undocumented registers.
3208 * The caller must ensure that this function cannot be called
3209 * concurrently with either itself or regcache_sync().
3211 int regmap_register_patch(struct regmap *map, const struct reg_sequence *regs,
3214 struct reg_sequence *p;
3218 if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n",
3222 p = krealloc(map->patch,
3223 sizeof(struct reg_sequence) * (map->patch_regs + num_regs),
3226 memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs));
3228 map->patch_regs += num_regs;
3233 map->lock(map->lock_arg);
3235 bypass = map->cache_bypass;
3237 map->cache_bypass = true;
3240 ret = _regmap_multi_reg_write(map, regs, num_regs);
3243 map->cache_bypass = bypass;
3245 map->unlock(map->lock_arg);
3247 regmap_async_complete(map);
3251 EXPORT_SYMBOL_GPL(regmap_register_patch);
3254 * regmap_get_val_bytes() - Report the size of a register value
3256 * @map: Register map to operate on.
3258 * Report the size of a register value, mainly intended to for use by
3259 * generic infrastructure built on top of regmap.
3261 int regmap_get_val_bytes(struct regmap *map)
3263 if (map->format.format_write)
3266 return map->format.val_bytes;
3268 EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
3271 * regmap_get_max_register() - Report the max register value
3273 * @map: Register map to operate on.
3275 * Report the max register value, mainly intended to for use by
3276 * generic infrastructure built on top of regmap.
3278 int regmap_get_max_register(struct regmap *map)
3280 return map->max_register ? map->max_register : -EINVAL;
3282 EXPORT_SYMBOL_GPL(regmap_get_max_register);
3285 * regmap_get_reg_stride() - Report the register address stride
3287 * @map: Register map to operate on.
3289 * Report the register address stride, mainly intended to for use by
3290 * generic infrastructure built on top of regmap.
3292 int regmap_get_reg_stride(struct regmap *map)
3294 return map->reg_stride;
3296 EXPORT_SYMBOL_GPL(regmap_get_reg_stride);
3298 int regmap_parse_val(struct regmap *map, const void *buf,
3301 if (!map->format.parse_val)
3304 *val = map->format.parse_val(buf);
3308 EXPORT_SYMBOL_GPL(regmap_parse_val);
3310 static int __init regmap_initcall(void)
3312 regmap_debugfs_initcall();
3316 postcore_initcall(regmap_initcall);