Commit | Line | Data |
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b83a313b MB |
1 | /* |
2 | * Register map access API | |
3 | * | |
4 | * Copyright 2011 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
f5d6eba7 | 13 | #include <linux/device.h> |
b83a313b | 14 | #include <linux/slab.h> |
19694b5e | 15 | #include <linux/export.h> |
b83a313b MB |
16 | #include <linux/mutex.h> |
17 | #include <linux/err.h> | |
6863ca62 | 18 | #include <linux/rbtree.h> |
b83a313b | 19 | |
fb2736bb MB |
20 | #define CREATE_TRACE_POINTS |
21 | #include <trace/events/regmap.h> | |
22 | ||
93de9124 | 23 | #include "internal.h" |
b83a313b | 24 | |
1044c180 MB |
25 | /* |
26 | * Sometimes for failures during very early init the trace | |
27 | * infrastructure isn't available early enough to be used. For this | |
28 | * sort of problem defining LOG_DEVICE will add printks for basic | |
29 | * register I/O on a specific device. | |
30 | */ | |
31 | #undef LOG_DEVICE | |
32 | ||
33 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
34 | unsigned int mask, unsigned int val, | |
35 | bool *change); | |
36 | ||
ad278406 AS |
37 | static int _regmap_bus_read(void *context, unsigned int reg, |
38 | unsigned int *val); | |
07c320dc AS |
39 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
40 | unsigned int val); | |
41 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
42 | unsigned int val); | |
ad278406 | 43 | |
0d509f2b MB |
44 | static void async_cleanup(struct work_struct *work) |
45 | { | |
46 | struct regmap_async *async = container_of(work, struct regmap_async, | |
47 | cleanup); | |
48 | ||
49 | kfree(async->work_buf); | |
50 | kfree(async); | |
51 | } | |
52 | ||
76aad392 DC |
53 | bool regmap_reg_in_ranges(unsigned int reg, |
54 | const struct regmap_range *ranges, | |
55 | unsigned int nranges) | |
56 | { | |
57 | const struct regmap_range *r; | |
58 | int i; | |
59 | ||
60 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
61 | if (regmap_reg_in_range(reg, r)) | |
62 | return true; | |
63 | return false; | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
66 | ||
67 | static bool _regmap_check_range_table(struct regmap *map, | |
68 | unsigned int reg, | |
69 | const struct regmap_access_table *table) | |
70 | { | |
71 | /* Check "no ranges" first */ | |
72 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
73 | return false; | |
74 | ||
75 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
76 | if (!table->n_yes_ranges) | |
77 | return true; | |
78 | ||
79 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
80 | table->n_yes_ranges); | |
81 | } | |
82 | ||
8de2f081 MB |
83 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
84 | { | |
85 | if (map->max_register && reg > map->max_register) | |
86 | return false; | |
87 | ||
88 | if (map->writeable_reg) | |
89 | return map->writeable_reg(map->dev, reg); | |
90 | ||
76aad392 DC |
91 | if (map->wr_table) |
92 | return _regmap_check_range_table(map, reg, map->wr_table); | |
93 | ||
8de2f081 MB |
94 | return true; |
95 | } | |
96 | ||
97 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
98 | { | |
99 | if (map->max_register && reg > map->max_register) | |
100 | return false; | |
101 | ||
4191f197 WS |
102 | if (map->format.format_write) |
103 | return false; | |
104 | ||
8de2f081 MB |
105 | if (map->readable_reg) |
106 | return map->readable_reg(map->dev, reg); | |
107 | ||
76aad392 DC |
108 | if (map->rd_table) |
109 | return _regmap_check_range_table(map, reg, map->rd_table); | |
110 | ||
8de2f081 MB |
111 | return true; |
112 | } | |
113 | ||
114 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
115 | { | |
4191f197 | 116 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
117 | return false; |
118 | ||
119 | if (map->volatile_reg) | |
120 | return map->volatile_reg(map->dev, reg); | |
121 | ||
76aad392 DC |
122 | if (map->volatile_table) |
123 | return _regmap_check_range_table(map, reg, map->volatile_table); | |
124 | ||
8de2f081 MB |
125 | return true; |
126 | } | |
127 | ||
128 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
129 | { | |
4191f197 | 130 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
131 | return false; |
132 | ||
133 | if (map->precious_reg) | |
134 | return map->precious_reg(map->dev, reg); | |
135 | ||
76aad392 DC |
136 | if (map->precious_table) |
137 | return _regmap_check_range_table(map, reg, map->precious_table); | |
138 | ||
8de2f081 MB |
139 | return false; |
140 | } | |
141 | ||
82cd9965 | 142 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 143 | size_t num) |
82cd9965 LPC |
144 | { |
145 | unsigned int i; | |
146 | ||
147 | for (i = 0; i < num; i++) | |
148 | if (!regmap_volatile(map, reg + i)) | |
149 | return false; | |
150 | ||
151 | return true; | |
152 | } | |
153 | ||
9aa50750 WS |
154 | static void regmap_format_2_6_write(struct regmap *map, |
155 | unsigned int reg, unsigned int val) | |
156 | { | |
157 | u8 *out = map->work_buf; | |
158 | ||
159 | *out = (reg << 6) | val; | |
160 | } | |
161 | ||
b83a313b MB |
162 | static void regmap_format_4_12_write(struct regmap *map, |
163 | unsigned int reg, unsigned int val) | |
164 | { | |
165 | __be16 *out = map->work_buf; | |
166 | *out = cpu_to_be16((reg << 12) | val); | |
167 | } | |
168 | ||
169 | static void regmap_format_7_9_write(struct regmap *map, | |
170 | unsigned int reg, unsigned int val) | |
171 | { | |
172 | __be16 *out = map->work_buf; | |
173 | *out = cpu_to_be16((reg << 9) | val); | |
174 | } | |
175 | ||
7e5ec63e LPC |
176 | static void regmap_format_10_14_write(struct regmap *map, |
177 | unsigned int reg, unsigned int val) | |
178 | { | |
179 | u8 *out = map->work_buf; | |
180 | ||
181 | out[2] = val; | |
182 | out[1] = (val >> 8) | (reg << 6); | |
183 | out[0] = reg >> 2; | |
184 | } | |
185 | ||
d939fb9a | 186 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
187 | { |
188 | u8 *b = buf; | |
189 | ||
d939fb9a | 190 | b[0] = val << shift; |
b83a313b MB |
191 | } |
192 | ||
141eba2e | 193 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
194 | { |
195 | __be16 *b = buf; | |
196 | ||
d939fb9a | 197 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
198 | } |
199 | ||
141eba2e SW |
200 | static void regmap_format_16_native(void *buf, unsigned int val, |
201 | unsigned int shift) | |
202 | { | |
203 | *(u16 *)buf = val << shift; | |
204 | } | |
205 | ||
d939fb9a | 206 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
207 | { |
208 | u8 *b = buf; | |
209 | ||
d939fb9a MR |
210 | val <<= shift; |
211 | ||
ea279fc5 MR |
212 | b[0] = val >> 16; |
213 | b[1] = val >> 8; | |
214 | b[2] = val; | |
215 | } | |
216 | ||
141eba2e | 217 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
218 | { |
219 | __be32 *b = buf; | |
220 | ||
d939fb9a | 221 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
222 | } |
223 | ||
141eba2e SW |
224 | static void regmap_format_32_native(void *buf, unsigned int val, |
225 | unsigned int shift) | |
226 | { | |
227 | *(u32 *)buf = val << shift; | |
228 | } | |
229 | ||
b83a313b MB |
230 | static unsigned int regmap_parse_8(void *buf) |
231 | { | |
232 | u8 *b = buf; | |
233 | ||
234 | return b[0]; | |
235 | } | |
236 | ||
141eba2e | 237 | static unsigned int regmap_parse_16_be(void *buf) |
b83a313b MB |
238 | { |
239 | __be16 *b = buf; | |
240 | ||
241 | b[0] = be16_to_cpu(b[0]); | |
242 | ||
243 | return b[0]; | |
244 | } | |
245 | ||
141eba2e SW |
246 | static unsigned int regmap_parse_16_native(void *buf) |
247 | { | |
248 | return *(u16 *)buf; | |
249 | } | |
250 | ||
ea279fc5 MR |
251 | static unsigned int regmap_parse_24(void *buf) |
252 | { | |
253 | u8 *b = buf; | |
254 | unsigned int ret = b[2]; | |
255 | ret |= ((unsigned int)b[1]) << 8; | |
256 | ret |= ((unsigned int)b[0]) << 16; | |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
141eba2e | 261 | static unsigned int regmap_parse_32_be(void *buf) |
7d5e525b MB |
262 | { |
263 | __be32 *b = buf; | |
264 | ||
265 | b[0] = be32_to_cpu(b[0]); | |
266 | ||
267 | return b[0]; | |
268 | } | |
269 | ||
141eba2e SW |
270 | static unsigned int regmap_parse_32_native(void *buf) |
271 | { | |
272 | return *(u32 *)buf; | |
273 | } | |
274 | ||
0d4529c5 | 275 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 276 | { |
0d4529c5 | 277 | struct regmap *map = __map; |
bacdbe07 SW |
278 | mutex_lock(&map->mutex); |
279 | } | |
280 | ||
0d4529c5 | 281 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 282 | { |
0d4529c5 | 283 | struct regmap *map = __map; |
bacdbe07 SW |
284 | mutex_unlock(&map->mutex); |
285 | } | |
286 | ||
0d4529c5 | 287 | static void regmap_lock_spinlock(void *__map) |
bacdbe07 | 288 | { |
0d4529c5 | 289 | struct regmap *map = __map; |
bacdbe07 SW |
290 | spin_lock(&map->spinlock); |
291 | } | |
292 | ||
0d4529c5 | 293 | static void regmap_unlock_spinlock(void *__map) |
bacdbe07 | 294 | { |
0d4529c5 | 295 | struct regmap *map = __map; |
bacdbe07 SW |
296 | spin_unlock(&map->spinlock); |
297 | } | |
298 | ||
72b39f6f MB |
299 | static void dev_get_regmap_release(struct device *dev, void *res) |
300 | { | |
301 | /* | |
302 | * We don't actually have anything to do here; the goal here | |
303 | * is not to manage the regmap but to provide a simple way to | |
304 | * get the regmap back given a struct device. | |
305 | */ | |
306 | } | |
307 | ||
6863ca62 KG |
308 | static bool _regmap_range_add(struct regmap *map, |
309 | struct regmap_range_node *data) | |
310 | { | |
311 | struct rb_root *root = &map->range_tree; | |
312 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
313 | ||
314 | while (*new) { | |
315 | struct regmap_range_node *this = | |
316 | container_of(*new, struct regmap_range_node, node); | |
317 | ||
318 | parent = *new; | |
319 | if (data->range_max < this->range_min) | |
320 | new = &((*new)->rb_left); | |
321 | else if (data->range_min > this->range_max) | |
322 | new = &((*new)->rb_right); | |
323 | else | |
324 | return false; | |
325 | } | |
326 | ||
327 | rb_link_node(&data->node, parent, new); | |
328 | rb_insert_color(&data->node, root); | |
329 | ||
330 | return true; | |
331 | } | |
332 | ||
333 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
334 | unsigned int reg) | |
335 | { | |
336 | struct rb_node *node = map->range_tree.rb_node; | |
337 | ||
338 | while (node) { | |
339 | struct regmap_range_node *this = | |
340 | container_of(node, struct regmap_range_node, node); | |
341 | ||
342 | if (reg < this->range_min) | |
343 | node = node->rb_left; | |
344 | else if (reg > this->range_max) | |
345 | node = node->rb_right; | |
346 | else | |
347 | return this; | |
348 | } | |
349 | ||
350 | return NULL; | |
351 | } | |
352 | ||
353 | static void regmap_range_exit(struct regmap *map) | |
354 | { | |
355 | struct rb_node *next; | |
356 | struct regmap_range_node *range_node; | |
357 | ||
358 | next = rb_first(&map->range_tree); | |
359 | while (next) { | |
360 | range_node = rb_entry(next, struct regmap_range_node, node); | |
361 | next = rb_next(&range_node->node); | |
362 | rb_erase(&range_node->node, &map->range_tree); | |
363 | kfree(range_node); | |
364 | } | |
365 | ||
366 | kfree(map->selector_work_buf); | |
367 | } | |
368 | ||
b83a313b MB |
369 | /** |
370 | * regmap_init(): Initialise register map | |
371 | * | |
372 | * @dev: Device that will be interacted with | |
373 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 374 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
375 | * @config: Configuration for register map |
376 | * | |
377 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
378 | * a struct regmap. This function should generally not be called | |
379 | * directly, it should be called by bus-specific init functions. | |
380 | */ | |
381 | struct regmap *regmap_init(struct device *dev, | |
382 | const struct regmap_bus *bus, | |
0135bbcc | 383 | void *bus_context, |
b83a313b MB |
384 | const struct regmap_config *config) |
385 | { | |
72b39f6f | 386 | struct regmap *map, **m; |
b83a313b | 387 | int ret = -EINVAL; |
141eba2e | 388 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 389 | int i, j; |
b83a313b MB |
390 | |
391 | if (!bus || !config) | |
abbb18fb | 392 | goto err; |
b83a313b MB |
393 | |
394 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
395 | if (map == NULL) { | |
396 | ret = -ENOMEM; | |
397 | goto err; | |
398 | } | |
399 | ||
0d4529c5 DC |
400 | if (config->lock && config->unlock) { |
401 | map->lock = config->lock; | |
402 | map->unlock = config->unlock; | |
403 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 404 | } else { |
0d4529c5 DC |
405 | if (bus->fast_io) { |
406 | spin_lock_init(&map->spinlock); | |
407 | map->lock = regmap_lock_spinlock; | |
408 | map->unlock = regmap_unlock_spinlock; | |
409 | } else { | |
410 | mutex_init(&map->mutex); | |
411 | map->lock = regmap_lock_mutex; | |
412 | map->unlock = regmap_unlock_mutex; | |
413 | } | |
414 | map->lock_arg = map; | |
bacdbe07 | 415 | } |
c212accc | 416 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 417 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 418 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
419 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
420 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 421 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
422 | if (config->reg_stride) |
423 | map->reg_stride = config->reg_stride; | |
424 | else | |
425 | map->reg_stride = 1; | |
2e33caf1 | 426 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
427 | map->dev = dev; |
428 | map->bus = bus; | |
0135bbcc | 429 | map->bus_context = bus_context; |
2e2ae66d | 430 | map->max_register = config->max_register; |
76aad392 DC |
431 | map->wr_table = config->wr_table; |
432 | map->rd_table = config->rd_table; | |
433 | map->volatile_table = config->volatile_table; | |
434 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
435 | map->writeable_reg = config->writeable_reg; |
436 | map->readable_reg = config->readable_reg; | |
437 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 438 | map->precious_reg = config->precious_reg; |
5d1729e7 | 439 | map->cache_type = config->cache_type; |
72b39f6f | 440 | map->name = config->name; |
b83a313b | 441 | |
0d509f2b MB |
442 | spin_lock_init(&map->async_lock); |
443 | INIT_LIST_HEAD(&map->async_list); | |
444 | init_waitqueue_head(&map->async_waitq); | |
445 | ||
6f306441 LPC |
446 | if (config->read_flag_mask || config->write_flag_mask) { |
447 | map->read_flag_mask = config->read_flag_mask; | |
448 | map->write_flag_mask = config->write_flag_mask; | |
449 | } else { | |
450 | map->read_flag_mask = bus->read_flag_mask; | |
451 | } | |
452 | ||
ad278406 AS |
453 | map->reg_read = _regmap_bus_read; |
454 | ||
141eba2e SW |
455 | reg_endian = config->reg_format_endian; |
456 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
457 | reg_endian = bus->reg_format_endian_default; | |
458 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
459 | reg_endian = REGMAP_ENDIAN_BIG; | |
460 | ||
461 | val_endian = config->val_format_endian; | |
462 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
463 | val_endian = bus->val_format_endian_default; | |
464 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
465 | val_endian = REGMAP_ENDIAN_BIG; | |
466 | ||
d939fb9a | 467 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
468 | case 2: |
469 | switch (config->val_bits) { | |
470 | case 6: | |
471 | map->format.format_write = regmap_format_2_6_write; | |
472 | break; | |
473 | default: | |
474 | goto err_map; | |
475 | } | |
476 | break; | |
477 | ||
b83a313b MB |
478 | case 4: |
479 | switch (config->val_bits) { | |
480 | case 12: | |
481 | map->format.format_write = regmap_format_4_12_write; | |
482 | break; | |
483 | default: | |
484 | goto err_map; | |
485 | } | |
486 | break; | |
487 | ||
488 | case 7: | |
489 | switch (config->val_bits) { | |
490 | case 9: | |
491 | map->format.format_write = regmap_format_7_9_write; | |
492 | break; | |
493 | default: | |
494 | goto err_map; | |
495 | } | |
496 | break; | |
497 | ||
7e5ec63e LPC |
498 | case 10: |
499 | switch (config->val_bits) { | |
500 | case 14: | |
501 | map->format.format_write = regmap_format_10_14_write; | |
502 | break; | |
503 | default: | |
504 | goto err_map; | |
505 | } | |
506 | break; | |
507 | ||
b83a313b MB |
508 | case 8: |
509 | map->format.format_reg = regmap_format_8; | |
510 | break; | |
511 | ||
512 | case 16: | |
141eba2e SW |
513 | switch (reg_endian) { |
514 | case REGMAP_ENDIAN_BIG: | |
515 | map->format.format_reg = regmap_format_16_be; | |
516 | break; | |
517 | case REGMAP_ENDIAN_NATIVE: | |
518 | map->format.format_reg = regmap_format_16_native; | |
519 | break; | |
520 | default: | |
521 | goto err_map; | |
522 | } | |
b83a313b MB |
523 | break; |
524 | ||
7d5e525b | 525 | case 32: |
141eba2e SW |
526 | switch (reg_endian) { |
527 | case REGMAP_ENDIAN_BIG: | |
528 | map->format.format_reg = regmap_format_32_be; | |
529 | break; | |
530 | case REGMAP_ENDIAN_NATIVE: | |
531 | map->format.format_reg = regmap_format_32_native; | |
532 | break; | |
533 | default: | |
534 | goto err_map; | |
535 | } | |
7d5e525b MB |
536 | break; |
537 | ||
b83a313b MB |
538 | default: |
539 | goto err_map; | |
540 | } | |
541 | ||
542 | switch (config->val_bits) { | |
543 | case 8: | |
544 | map->format.format_val = regmap_format_8; | |
545 | map->format.parse_val = regmap_parse_8; | |
546 | break; | |
547 | case 16: | |
141eba2e SW |
548 | switch (val_endian) { |
549 | case REGMAP_ENDIAN_BIG: | |
550 | map->format.format_val = regmap_format_16_be; | |
551 | map->format.parse_val = regmap_parse_16_be; | |
552 | break; | |
553 | case REGMAP_ENDIAN_NATIVE: | |
554 | map->format.format_val = regmap_format_16_native; | |
555 | map->format.parse_val = regmap_parse_16_native; | |
556 | break; | |
557 | default: | |
558 | goto err_map; | |
559 | } | |
b83a313b | 560 | break; |
ea279fc5 | 561 | case 24: |
141eba2e SW |
562 | if (val_endian != REGMAP_ENDIAN_BIG) |
563 | goto err_map; | |
ea279fc5 MR |
564 | map->format.format_val = regmap_format_24; |
565 | map->format.parse_val = regmap_parse_24; | |
566 | break; | |
7d5e525b | 567 | case 32: |
141eba2e SW |
568 | switch (val_endian) { |
569 | case REGMAP_ENDIAN_BIG: | |
570 | map->format.format_val = regmap_format_32_be; | |
571 | map->format.parse_val = regmap_parse_32_be; | |
572 | break; | |
573 | case REGMAP_ENDIAN_NATIVE: | |
574 | map->format.format_val = regmap_format_32_native; | |
575 | map->format.parse_val = regmap_parse_32_native; | |
576 | break; | |
577 | default: | |
578 | goto err_map; | |
579 | } | |
7d5e525b | 580 | break; |
b83a313b MB |
581 | } |
582 | ||
141eba2e SW |
583 | if (map->format.format_write) { |
584 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
585 | (val_endian != REGMAP_ENDIAN_BIG)) | |
586 | goto err_map; | |
7a647614 | 587 | map->use_single_rw = true; |
141eba2e | 588 | } |
7a647614 | 589 | |
b83a313b MB |
590 | if (!map->format.format_write && |
591 | !(map->format.format_reg && map->format.format_val)) | |
592 | goto err_map; | |
593 | ||
82159ba8 | 594 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
595 | if (map->work_buf == NULL) { |
596 | ret = -ENOMEM; | |
5204f5e3 | 597 | goto err_map; |
b83a313b MB |
598 | } |
599 | ||
07c320dc AS |
600 | if (map->format.format_write) |
601 | map->reg_write = _regmap_bus_formatted_write; | |
602 | else if (map->format.format_val) | |
603 | map->reg_write = _regmap_bus_raw_write; | |
604 | ||
6863ca62 | 605 | map->range_tree = RB_ROOT; |
e3549cd0 | 606 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
607 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
608 | struct regmap_range_node *new; | |
609 | ||
610 | /* Sanity check */ | |
061adc06 MB |
611 | if (range_cfg->range_max < range_cfg->range_min) { |
612 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
613 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 614 | goto err_range; |
061adc06 MB |
615 | } |
616 | ||
617 | if (range_cfg->range_max > map->max_register) { | |
618 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
619 | range_cfg->range_max, map->max_register); | |
620 | goto err_range; | |
621 | } | |
622 | ||
623 | if (range_cfg->selector_reg > map->max_register) { | |
624 | dev_err(map->dev, | |
625 | "Invalid range %d: selector out of map\n", i); | |
626 | goto err_range; | |
627 | } | |
628 | ||
629 | if (range_cfg->window_len == 0) { | |
630 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
631 | i); | |
632 | goto err_range; | |
633 | } | |
6863ca62 KG |
634 | |
635 | /* Make sure, that this register range has no selector | |
636 | or data window within its boundary */ | |
e3549cd0 | 637 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
638 | unsigned sel_reg = config->ranges[j].selector_reg; |
639 | unsigned win_min = config->ranges[j].window_start; | |
640 | unsigned win_max = win_min + | |
641 | config->ranges[j].window_len - 1; | |
642 | ||
643 | if (range_cfg->range_min <= sel_reg && | |
644 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
645 | dev_err(map->dev, |
646 | "Range %d: selector for %d in window\n", | |
647 | i, j); | |
6863ca62 KG |
648 | goto err_range; |
649 | } | |
650 | ||
651 | if (!(win_max < range_cfg->range_min || | |
652 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
653 | dev_err(map->dev, |
654 | "Range %d: window for %d in window\n", | |
655 | i, j); | |
6863ca62 KG |
656 | goto err_range; |
657 | } | |
658 | } | |
659 | ||
660 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
661 | if (new == NULL) { | |
662 | ret = -ENOMEM; | |
663 | goto err_range; | |
664 | } | |
665 | ||
4b020b3f | 666 | new->map = map; |
d058bb49 | 667 | new->name = range_cfg->name; |
6863ca62 KG |
668 | new->range_min = range_cfg->range_min; |
669 | new->range_max = range_cfg->range_max; | |
670 | new->selector_reg = range_cfg->selector_reg; | |
671 | new->selector_mask = range_cfg->selector_mask; | |
672 | new->selector_shift = range_cfg->selector_shift; | |
673 | new->window_start = range_cfg->window_start; | |
674 | new->window_len = range_cfg->window_len; | |
675 | ||
676 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 677 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
678 | kfree(new); |
679 | goto err_range; | |
680 | } | |
681 | ||
682 | if (map->selector_work_buf == NULL) { | |
683 | map->selector_work_buf = | |
684 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
685 | if (map->selector_work_buf == NULL) { | |
686 | ret = -ENOMEM; | |
687 | goto err_range; | |
688 | } | |
689 | } | |
690 | } | |
052d2cd1 | 691 | |
e5e3b8ab | 692 | ret = regcache_init(map, config); |
0ff3e62f | 693 | if (ret != 0) |
6863ca62 KG |
694 | goto err_range; |
695 | ||
696 | regmap_debugfs_init(map, config->name); | |
5d1729e7 | 697 | |
72b39f6f MB |
698 | /* Add a devres resource for dev_get_regmap() */ |
699 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
700 | if (!m) { | |
701 | ret = -ENOMEM; | |
6863ca62 | 702 | goto err_debugfs; |
72b39f6f MB |
703 | } |
704 | *m = map; | |
705 | devres_add(dev, m); | |
706 | ||
b83a313b MB |
707 | return map; |
708 | ||
bfaa25f3 SW |
709 | err_debugfs: |
710 | regmap_debugfs_exit(map); | |
72b39f6f | 711 | regcache_exit(map); |
6863ca62 KG |
712 | err_range: |
713 | regmap_range_exit(map); | |
58072cbf | 714 | kfree(map->work_buf); |
b83a313b MB |
715 | err_map: |
716 | kfree(map); | |
717 | err: | |
718 | return ERR_PTR(ret); | |
719 | } | |
720 | EXPORT_SYMBOL_GPL(regmap_init); | |
721 | ||
c0eb4676 MB |
722 | static void devm_regmap_release(struct device *dev, void *res) |
723 | { | |
724 | regmap_exit(*(struct regmap **)res); | |
725 | } | |
726 | ||
727 | /** | |
728 | * devm_regmap_init(): Initialise managed register map | |
729 | * | |
730 | * @dev: Device that will be interacted with | |
731 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 732 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
733 | * @config: Configuration for register map |
734 | * | |
735 | * The return value will be an ERR_PTR() on error or a valid pointer | |
736 | * to a struct regmap. This function should generally not be called | |
737 | * directly, it should be called by bus-specific init functions. The | |
738 | * map will be automatically freed by the device management code. | |
739 | */ | |
740 | struct regmap *devm_regmap_init(struct device *dev, | |
741 | const struct regmap_bus *bus, | |
0135bbcc | 742 | void *bus_context, |
c0eb4676 MB |
743 | const struct regmap_config *config) |
744 | { | |
745 | struct regmap **ptr, *regmap; | |
746 | ||
747 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
748 | if (!ptr) | |
749 | return ERR_PTR(-ENOMEM); | |
750 | ||
0135bbcc | 751 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
752 | if (!IS_ERR(regmap)) { |
753 | *ptr = regmap; | |
754 | devres_add(dev, ptr); | |
755 | } else { | |
756 | devres_free(ptr); | |
757 | } | |
758 | ||
759 | return regmap; | |
760 | } | |
761 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
762 | ||
bf315173 MB |
763 | /** |
764 | * regmap_reinit_cache(): Reinitialise the current register cache | |
765 | * | |
766 | * @map: Register map to operate on. | |
767 | * @config: New configuration. Only the cache data will be used. | |
768 | * | |
769 | * Discard any existing register cache for the map and initialize a | |
770 | * new cache. This can be used to restore the cache to defaults or to | |
771 | * update the cache configuration to reflect runtime discovery of the | |
772 | * hardware. | |
4d879514 DP |
773 | * |
774 | * No explicit locking is done here, the user needs to ensure that | |
775 | * this function will not race with other calls to regmap. | |
bf315173 MB |
776 | */ |
777 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
778 | { | |
bf315173 | 779 | regcache_exit(map); |
a24f64a6 | 780 | regmap_debugfs_exit(map); |
bf315173 MB |
781 | |
782 | map->max_register = config->max_register; | |
783 | map->writeable_reg = config->writeable_reg; | |
784 | map->readable_reg = config->readable_reg; | |
785 | map->volatile_reg = config->volatile_reg; | |
786 | map->precious_reg = config->precious_reg; | |
787 | map->cache_type = config->cache_type; | |
788 | ||
d3c242e1 | 789 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 790 | |
421e8d2d MB |
791 | map->cache_bypass = false; |
792 | map->cache_only = false; | |
793 | ||
4d879514 | 794 | return regcache_init(map, config); |
bf315173 | 795 | } |
752a6a5f | 796 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 797 | |
b83a313b MB |
798 | /** |
799 | * regmap_exit(): Free a previously allocated register map | |
800 | */ | |
801 | void regmap_exit(struct regmap *map) | |
802 | { | |
5d1729e7 | 803 | regcache_exit(map); |
31244e39 | 804 | regmap_debugfs_exit(map); |
6863ca62 | 805 | regmap_range_exit(map); |
0135bbcc SW |
806 | if (map->bus->free_context) |
807 | map->bus->free_context(map->bus_context); | |
b83a313b | 808 | kfree(map->work_buf); |
b83a313b MB |
809 | kfree(map); |
810 | } | |
811 | EXPORT_SYMBOL_GPL(regmap_exit); | |
812 | ||
72b39f6f MB |
813 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
814 | { | |
815 | struct regmap **r = res; | |
816 | if (!r || !*r) { | |
817 | WARN_ON(!r || !*r); | |
818 | return 0; | |
819 | } | |
820 | ||
821 | /* If the user didn't specify a name match any */ | |
822 | if (data) | |
823 | return (*r)->name == data; | |
824 | else | |
825 | return 1; | |
826 | } | |
827 | ||
828 | /** | |
829 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
830 | * | |
831 | * @dev: Device to retrieve the map for | |
832 | * @name: Optional name for the register map, usually NULL. | |
833 | * | |
834 | * Returns the regmap for the device if one is present, or NULL. If | |
835 | * name is specified then it must match the name specified when | |
836 | * registering the device, if it is NULL then the first regmap found | |
837 | * will be used. Devices with multiple register maps are very rare, | |
838 | * generic code should normally not need to specify a name. | |
839 | */ | |
840 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
841 | { | |
842 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
843 | dev_get_regmap_match, (void *)name); | |
844 | ||
845 | if (!r) | |
846 | return NULL; | |
847 | return *r; | |
848 | } | |
849 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
850 | ||
6863ca62 | 851 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 852 | struct regmap_range_node *range, |
6863ca62 KG |
853 | unsigned int val_num) |
854 | { | |
6863ca62 KG |
855 | void *orig_work_buf; |
856 | unsigned int win_offset; | |
857 | unsigned int win_page; | |
858 | bool page_chg; | |
859 | int ret; | |
860 | ||
98bc7dfd MB |
861 | win_offset = (*reg - range->range_min) % range->window_len; |
862 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 863 | |
98bc7dfd MB |
864 | if (val_num > 1) { |
865 | /* Bulk write shouldn't cross range boundary */ | |
866 | if (*reg + val_num - 1 > range->range_max) | |
867 | return -EINVAL; | |
6863ca62 | 868 | |
98bc7dfd MB |
869 | /* ... or single page boundary */ |
870 | if (val_num > range->window_len - win_offset) | |
871 | return -EINVAL; | |
872 | } | |
6863ca62 | 873 | |
98bc7dfd MB |
874 | /* It is possible to have selector register inside data window. |
875 | In that case, selector register is located on every page and | |
876 | it needs no page switching, when accessed alone. */ | |
877 | if (val_num > 1 || | |
878 | range->window_start + win_offset != range->selector_reg) { | |
879 | /* Use separate work_buf during page switching */ | |
880 | orig_work_buf = map->work_buf; | |
881 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 882 | |
98bc7dfd MB |
883 | ret = _regmap_update_bits(map, range->selector_reg, |
884 | range->selector_mask, | |
885 | win_page << range->selector_shift, | |
886 | &page_chg); | |
632a5b01 | 887 | |
98bc7dfd | 888 | map->work_buf = orig_work_buf; |
6863ca62 | 889 | |
0ff3e62f | 890 | if (ret != 0) |
98bc7dfd | 891 | return ret; |
6863ca62 KG |
892 | } |
893 | ||
98bc7dfd MB |
894 | *reg = range->window_start + win_offset; |
895 | ||
6863ca62 KG |
896 | return 0; |
897 | } | |
898 | ||
b83a313b | 899 | static int _regmap_raw_write(struct regmap *map, unsigned int reg, |
0d509f2b | 900 | const void *val, size_t val_len, bool async) |
b83a313b | 901 | { |
98bc7dfd | 902 | struct regmap_range_node *range; |
0d509f2b | 903 | unsigned long flags; |
6f306441 | 904 | u8 *u8 = map->work_buf; |
0d509f2b MB |
905 | void *work_val = map->work_buf + map->format.reg_bytes + |
906 | map->format.pad_bytes; | |
b83a313b MB |
907 | void *buf; |
908 | int ret = -ENOTSUPP; | |
909 | size_t len; | |
73304781 MB |
910 | int i; |
911 | ||
912 | /* Check for unwritable registers before we start */ | |
913 | if (map->writeable_reg) | |
914 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
915 | if (!map->writeable_reg(map->dev, |
916 | reg + (i * map->reg_stride))) | |
73304781 | 917 | return -EINVAL; |
b83a313b | 918 | |
c9157198 LD |
919 | if (!map->cache_bypass && map->format.parse_val) { |
920 | unsigned int ival; | |
921 | int val_bytes = map->format.val_bytes; | |
922 | for (i = 0; i < val_len / val_bytes; i++) { | |
923 | memcpy(map->work_buf, val + (i * val_bytes), val_bytes); | |
924 | ival = map->format.parse_val(map->work_buf); | |
f01ee60f SW |
925 | ret = regcache_write(map, reg + (i * map->reg_stride), |
926 | ival); | |
c9157198 LD |
927 | if (ret) { |
928 | dev_err(map->dev, | |
6d04b8ac | 929 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
930 | reg + i, ret); |
931 | return ret; | |
932 | } | |
933 | } | |
934 | if (map->cache_only) { | |
935 | map->cache_dirty = true; | |
936 | return 0; | |
937 | } | |
938 | } | |
939 | ||
98bc7dfd MB |
940 | range = _regmap_range_lookup(map, reg); |
941 | if (range) { | |
8a2ceac6 MB |
942 | int val_num = val_len / map->format.val_bytes; |
943 | int win_offset = (reg - range->range_min) % range->window_len; | |
944 | int win_residue = range->window_len - win_offset; | |
945 | ||
946 | /* If the write goes beyond the end of the window split it */ | |
947 | while (val_num > win_residue) { | |
1a61cfe3 | 948 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
949 | win_residue, val_len / map->format.val_bytes); |
950 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
0d509f2b | 951 | map->format.val_bytes, async); |
8a2ceac6 MB |
952 | if (ret != 0) |
953 | return ret; | |
954 | ||
955 | reg += win_residue; | |
956 | val_num -= win_residue; | |
957 | val += win_residue * map->format.val_bytes; | |
958 | val_len -= win_residue * map->format.val_bytes; | |
959 | ||
960 | win_offset = (reg - range->range_min) % | |
961 | range->window_len; | |
962 | win_residue = range->window_len - win_offset; | |
963 | } | |
964 | ||
965 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 966 | if (ret != 0) |
98bc7dfd MB |
967 | return ret; |
968 | } | |
6863ca62 | 969 | |
d939fb9a | 970 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 971 | |
6f306441 LPC |
972 | u8[0] |= map->write_flag_mask; |
973 | ||
0d509f2b MB |
974 | if (async && map->bus->async_write) { |
975 | struct regmap_async *async = map->bus->async_alloc(); | |
976 | if (!async) | |
977 | return -ENOMEM; | |
978 | ||
979 | async->work_buf = kzalloc(map->format.buf_size, | |
980 | GFP_KERNEL | GFP_DMA); | |
981 | if (!async->work_buf) { | |
982 | kfree(async); | |
983 | return -ENOMEM; | |
984 | } | |
985 | ||
986 | INIT_WORK(&async->cleanup, async_cleanup); | |
987 | async->map = map; | |
988 | ||
989 | /* If the caller supplied the value we can use it safely. */ | |
990 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + | |
991 | map->format.reg_bytes + map->format.val_bytes); | |
992 | if (val == work_val) | |
993 | val = async->work_buf + map->format.pad_bytes + | |
994 | map->format.reg_bytes; | |
995 | ||
996 | spin_lock_irqsave(&map->async_lock, flags); | |
997 | list_add_tail(&async->list, &map->async_list); | |
998 | spin_unlock_irqrestore(&map->async_lock, flags); | |
999 | ||
1000 | ret = map->bus->async_write(map->bus_context, async->work_buf, | |
1001 | map->format.reg_bytes + | |
1002 | map->format.pad_bytes, | |
1003 | val, val_len, async); | |
1004 | ||
1005 | if (ret != 0) { | |
1006 | dev_err(map->dev, "Failed to schedule write: %d\n", | |
1007 | ret); | |
1008 | ||
1009 | spin_lock_irqsave(&map->async_lock, flags); | |
1010 | list_del(&async->list); | |
1011 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1012 | ||
1013 | kfree(async->work_buf); | |
1014 | kfree(async); | |
1015 | } | |
1016 | } | |
1017 | ||
fb2736bb MB |
1018 | trace_regmap_hw_write_start(map->dev, reg, |
1019 | val_len / map->format.val_bytes); | |
1020 | ||
2547e201 MB |
1021 | /* If we're doing a single register write we can probably just |
1022 | * send the work_buf directly, otherwise try to do a gather | |
1023 | * write. | |
1024 | */ | |
0d509f2b | 1025 | if (val == work_val) |
0135bbcc | 1026 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
1027 | map->format.reg_bytes + |
1028 | map->format.pad_bytes + | |
1029 | val_len); | |
2547e201 | 1030 | else if (map->bus->gather_write) |
0135bbcc | 1031 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
1032 | map->format.reg_bytes + |
1033 | map->format.pad_bytes, | |
b83a313b MB |
1034 | val, val_len); |
1035 | ||
2547e201 | 1036 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 1037 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
1038 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
1039 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
1040 | if (!buf) |
1041 | return -ENOMEM; | |
1042 | ||
1043 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
1044 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
1045 | val, val_len); | |
0135bbcc | 1046 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
1047 | |
1048 | kfree(buf); | |
1049 | } | |
1050 | ||
fb2736bb MB |
1051 | trace_regmap_hw_write_done(map->dev, reg, |
1052 | val_len / map->format.val_bytes); | |
1053 | ||
b83a313b MB |
1054 | return ret; |
1055 | } | |
1056 | ||
07c320dc AS |
1057 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
1058 | unsigned int val) | |
1059 | { | |
1060 | int ret; | |
1061 | struct regmap_range_node *range; | |
1062 | struct regmap *map = context; | |
1063 | ||
1064 | BUG_ON(!map->format.format_write); | |
1065 | ||
1066 | range = _regmap_range_lookup(map, reg); | |
1067 | if (range) { | |
1068 | ret = _regmap_select_page(map, ®, range, 1); | |
1069 | if (ret != 0) | |
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | map->format.format_write(map, reg, val); | |
1074 | ||
1075 | trace_regmap_hw_write_start(map->dev, reg, 1); | |
1076 | ||
1077 | ret = map->bus->write(map->bus_context, map->work_buf, | |
1078 | map->format.buf_size); | |
1079 | ||
1080 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1081 | ||
1082 | return ret; | |
1083 | } | |
1084 | ||
1085 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
1086 | unsigned int val) | |
1087 | { | |
1088 | struct regmap *map = context; | |
1089 | ||
1090 | BUG_ON(!map->format.format_val); | |
1091 | ||
1092 | map->format.format_val(map->work_buf + map->format.reg_bytes | |
1093 | + map->format.pad_bytes, val, 0); | |
1094 | return _regmap_raw_write(map, reg, | |
1095 | map->work_buf + | |
1096 | map->format.reg_bytes + | |
1097 | map->format.pad_bytes, | |
0d509f2b | 1098 | map->format.val_bytes, false); |
07c320dc AS |
1099 | } |
1100 | ||
4d2dc095 DP |
1101 | int _regmap_write(struct regmap *map, unsigned int reg, |
1102 | unsigned int val) | |
b83a313b | 1103 | { |
fb2736bb | 1104 | int ret; |
b83a313b | 1105 | |
c9157198 | 1106 | if (!map->cache_bypass && map->format.format_write) { |
5d1729e7 DP |
1107 | ret = regcache_write(map, reg, val); |
1108 | if (ret != 0) | |
1109 | return ret; | |
8ae0d7e8 MB |
1110 | if (map->cache_only) { |
1111 | map->cache_dirty = true; | |
5d1729e7 | 1112 | return 0; |
8ae0d7e8 | 1113 | } |
5d1729e7 DP |
1114 | } |
1115 | ||
1044c180 MB |
1116 | #ifdef LOG_DEVICE |
1117 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1118 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1119 | #endif | |
1120 | ||
fb2736bb MB |
1121 | trace_regmap_reg_write(map->dev, reg, val); |
1122 | ||
07c320dc | 1123 | return map->reg_write(map, reg, val); |
b83a313b MB |
1124 | } |
1125 | ||
1126 | /** | |
1127 | * regmap_write(): Write a value to a single register | |
1128 | * | |
1129 | * @map: Register map to write to | |
1130 | * @reg: Register to write to | |
1131 | * @val: Value to be written | |
1132 | * | |
1133 | * A value of zero will be returned on success, a negative errno will | |
1134 | * be returned in error cases. | |
1135 | */ | |
1136 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1137 | { | |
1138 | int ret; | |
1139 | ||
f01ee60f SW |
1140 | if (reg % map->reg_stride) |
1141 | return -EINVAL; | |
1142 | ||
0d4529c5 | 1143 | map->lock(map->lock_arg); |
b83a313b MB |
1144 | |
1145 | ret = _regmap_write(map, reg, val); | |
1146 | ||
0d4529c5 | 1147 | map->unlock(map->lock_arg); |
b83a313b MB |
1148 | |
1149 | return ret; | |
1150 | } | |
1151 | EXPORT_SYMBOL_GPL(regmap_write); | |
1152 | ||
1153 | /** | |
1154 | * regmap_raw_write(): Write raw values to one or more registers | |
1155 | * | |
1156 | * @map: Register map to write to | |
1157 | * @reg: Initial register to write to | |
1158 | * @val: Block of data to be written, laid out for direct transmission to the | |
1159 | * device | |
1160 | * @val_len: Length of data pointed to by val. | |
1161 | * | |
1162 | * This function is intended to be used for things like firmware | |
1163 | * download where a large block of data needs to be transferred to the | |
1164 | * device. No formatting will be done on the data provided. | |
1165 | * | |
1166 | * A value of zero will be returned on success, a negative errno will | |
1167 | * be returned in error cases. | |
1168 | */ | |
1169 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1170 | const void *val, size_t val_len) | |
1171 | { | |
1172 | int ret; | |
1173 | ||
851960ba SW |
1174 | if (val_len % map->format.val_bytes) |
1175 | return -EINVAL; | |
f01ee60f SW |
1176 | if (reg % map->reg_stride) |
1177 | return -EINVAL; | |
851960ba | 1178 | |
0d4529c5 | 1179 | map->lock(map->lock_arg); |
b83a313b | 1180 | |
0d509f2b | 1181 | ret = _regmap_raw_write(map, reg, val, val_len, false); |
b83a313b | 1182 | |
0d4529c5 | 1183 | map->unlock(map->lock_arg); |
b83a313b MB |
1184 | |
1185 | return ret; | |
1186 | } | |
1187 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1188 | ||
8eaeb219 LD |
1189 | /* |
1190 | * regmap_bulk_write(): Write multiple registers to the device | |
1191 | * | |
1192 | * @map: Register map to write to | |
1193 | * @reg: First register to be write from | |
1194 | * @val: Block of data to be written, in native register size for device | |
1195 | * @val_count: Number of registers to write | |
1196 | * | |
1197 | * This function is intended to be used for writing a large block of | |
1198 | * data to be device either in single transfer or multiple transfer. | |
1199 | * | |
1200 | * A value of zero will be returned on success, a negative errno will | |
1201 | * be returned in error cases. | |
1202 | */ | |
1203 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1204 | size_t val_count) | |
1205 | { | |
1206 | int ret = 0, i; | |
1207 | size_t val_bytes = map->format.val_bytes; | |
1208 | void *wval; | |
1209 | ||
1210 | if (!map->format.parse_val) | |
1211 | return -EINVAL; | |
f01ee60f SW |
1212 | if (reg % map->reg_stride) |
1213 | return -EINVAL; | |
8eaeb219 | 1214 | |
0d4529c5 | 1215 | map->lock(map->lock_arg); |
8eaeb219 LD |
1216 | |
1217 | /* No formatting is require if val_byte is 1 */ | |
1218 | if (val_bytes == 1) { | |
1219 | wval = (void *)val; | |
1220 | } else { | |
1221 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); | |
1222 | if (!wval) { | |
1223 | ret = -ENOMEM; | |
1224 | dev_err(map->dev, "Error in memory allocation\n"); | |
1225 | goto out; | |
1226 | } | |
1227 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
1228 | map->format.parse_val(wval + i); | |
1229 | } | |
2e33caf1 AJ |
1230 | /* |
1231 | * Some devices does not support bulk write, for | |
1232 | * them we have a series of single write operations. | |
1233 | */ | |
1234 | if (map->use_single_rw) { | |
1235 | for (i = 0; i < val_count; i++) { | |
1236 | ret = regmap_raw_write(map, | |
0d509f2b MB |
1237 | reg + (i * map->reg_stride), |
1238 | val + (i * val_bytes), | |
1239 | val_bytes); | |
2e33caf1 AJ |
1240 | if (ret != 0) |
1241 | return ret; | |
1242 | } | |
1243 | } else { | |
0d509f2b MB |
1244 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count, |
1245 | false); | |
2e33caf1 | 1246 | } |
8eaeb219 LD |
1247 | |
1248 | if (val_bytes != 1) | |
1249 | kfree(wval); | |
1250 | ||
1251 | out: | |
0d4529c5 | 1252 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1253 | return ret; |
1254 | } | |
1255 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1256 | ||
0d509f2b MB |
1257 | /** |
1258 | * regmap_raw_write_async(): Write raw values to one or more registers | |
1259 | * asynchronously | |
1260 | * | |
1261 | * @map: Register map to write to | |
1262 | * @reg: Initial register to write to | |
1263 | * @val: Block of data to be written, laid out for direct transmission to the | |
1264 | * device. Must be valid until regmap_async_complete() is called. | |
1265 | * @val_len: Length of data pointed to by val. | |
1266 | * | |
1267 | * This function is intended to be used for things like firmware | |
1268 | * download where a large block of data needs to be transferred to the | |
1269 | * device. No formatting will be done on the data provided. | |
1270 | * | |
1271 | * If supported by the underlying bus the write will be scheduled | |
1272 | * asynchronously, helping maximise I/O speed on higher speed buses | |
1273 | * like SPI. regmap_async_complete() can be called to ensure that all | |
1274 | * asynchrnous writes have been completed. | |
1275 | * | |
1276 | * A value of zero will be returned on success, a negative errno will | |
1277 | * be returned in error cases. | |
1278 | */ | |
1279 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, | |
1280 | const void *val, size_t val_len) | |
1281 | { | |
1282 | int ret; | |
1283 | ||
1284 | if (val_len % map->format.val_bytes) | |
1285 | return -EINVAL; | |
1286 | if (reg % map->reg_stride) | |
1287 | return -EINVAL; | |
1288 | ||
1289 | map->lock(map->lock_arg); | |
1290 | ||
1291 | ret = _regmap_raw_write(map, reg, val, val_len, true); | |
1292 | ||
1293 | map->unlock(map->lock_arg); | |
1294 | ||
1295 | return ret; | |
1296 | } | |
1297 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); | |
1298 | ||
b83a313b MB |
1299 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1300 | unsigned int val_len) | |
1301 | { | |
98bc7dfd | 1302 | struct regmap_range_node *range; |
b83a313b MB |
1303 | u8 *u8 = map->work_buf; |
1304 | int ret; | |
1305 | ||
98bc7dfd MB |
1306 | range = _regmap_range_lookup(map, reg); |
1307 | if (range) { | |
1308 | ret = _regmap_select_page(map, ®, range, | |
1309 | val_len / map->format.val_bytes); | |
0ff3e62f | 1310 | if (ret != 0) |
98bc7dfd MB |
1311 | return ret; |
1312 | } | |
6863ca62 | 1313 | |
d939fb9a | 1314 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1315 | |
1316 | /* | |
6f306441 | 1317 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1318 | * register addresss; since it's always the high bits for all |
1319 | * current formats we can do this here rather than in | |
1320 | * formatting. This may break if we get interesting formats. | |
1321 | */ | |
6f306441 | 1322 | u8[0] |= map->read_flag_mask; |
b83a313b | 1323 | |
fb2736bb MB |
1324 | trace_regmap_hw_read_start(map->dev, reg, |
1325 | val_len / map->format.val_bytes); | |
1326 | ||
0135bbcc | 1327 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1328 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1329 | val, val_len); |
b83a313b | 1330 | |
fb2736bb MB |
1331 | trace_regmap_hw_read_done(map->dev, reg, |
1332 | val_len / map->format.val_bytes); | |
1333 | ||
1334 | return ret; | |
b83a313b MB |
1335 | } |
1336 | ||
ad278406 AS |
1337 | static int _regmap_bus_read(void *context, unsigned int reg, |
1338 | unsigned int *val) | |
1339 | { | |
1340 | int ret; | |
1341 | struct regmap *map = context; | |
1342 | ||
1343 | if (!map->format.parse_val) | |
1344 | return -EINVAL; | |
1345 | ||
1346 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
1347 | if (ret == 0) | |
1348 | *val = map->format.parse_val(map->work_buf); | |
1349 | ||
1350 | return ret; | |
1351 | } | |
1352 | ||
b83a313b MB |
1353 | static int _regmap_read(struct regmap *map, unsigned int reg, |
1354 | unsigned int *val) | |
1355 | { | |
1356 | int ret; | |
ad278406 | 1357 | BUG_ON(!map->reg_read); |
b83a313b | 1358 | |
5d1729e7 DP |
1359 | if (!map->cache_bypass) { |
1360 | ret = regcache_read(map, reg, val); | |
1361 | if (ret == 0) | |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | if (map->cache_only) | |
1366 | return -EBUSY; | |
1367 | ||
ad278406 | 1368 | ret = map->reg_read(map, reg, val); |
fb2736bb | 1369 | if (ret == 0) { |
1044c180 MB |
1370 | #ifdef LOG_DEVICE |
1371 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1372 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1373 | #endif | |
1374 | ||
fb2736bb | 1375 | trace_regmap_reg_read(map->dev, reg, *val); |
b83a313b | 1376 | |
ad278406 AS |
1377 | if (!map->cache_bypass) |
1378 | regcache_write(map, reg, *val); | |
1379 | } | |
f2985367 | 1380 | |
b83a313b MB |
1381 | return ret; |
1382 | } | |
1383 | ||
1384 | /** | |
1385 | * regmap_read(): Read a value from a single register | |
1386 | * | |
1387 | * @map: Register map to write to | |
1388 | * @reg: Register to be read from | |
1389 | * @val: Pointer to store read value | |
1390 | * | |
1391 | * A value of zero will be returned on success, a negative errno will | |
1392 | * be returned in error cases. | |
1393 | */ | |
1394 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1395 | { | |
1396 | int ret; | |
1397 | ||
f01ee60f SW |
1398 | if (reg % map->reg_stride) |
1399 | return -EINVAL; | |
1400 | ||
0d4529c5 | 1401 | map->lock(map->lock_arg); |
b83a313b MB |
1402 | |
1403 | ret = _regmap_read(map, reg, val); | |
1404 | ||
0d4529c5 | 1405 | map->unlock(map->lock_arg); |
b83a313b MB |
1406 | |
1407 | return ret; | |
1408 | } | |
1409 | EXPORT_SYMBOL_GPL(regmap_read); | |
1410 | ||
1411 | /** | |
1412 | * regmap_raw_read(): Read raw data from the device | |
1413 | * | |
1414 | * @map: Register map to write to | |
1415 | * @reg: First register to be read from | |
1416 | * @val: Pointer to store read value | |
1417 | * @val_len: Size of data to read | |
1418 | * | |
1419 | * A value of zero will be returned on success, a negative errno will | |
1420 | * be returned in error cases. | |
1421 | */ | |
1422 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1423 | size_t val_len) | |
1424 | { | |
b8fb5ab1 MB |
1425 | size_t val_bytes = map->format.val_bytes; |
1426 | size_t val_count = val_len / val_bytes; | |
1427 | unsigned int v; | |
1428 | int ret, i; | |
04e016ad | 1429 | |
851960ba SW |
1430 | if (val_len % map->format.val_bytes) |
1431 | return -EINVAL; | |
f01ee60f SW |
1432 | if (reg % map->reg_stride) |
1433 | return -EINVAL; | |
851960ba | 1434 | |
0d4529c5 | 1435 | map->lock(map->lock_arg); |
b83a313b | 1436 | |
b8fb5ab1 MB |
1437 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1438 | map->cache_type == REGCACHE_NONE) { | |
1439 | /* Physical block read if there's no cache involved */ | |
1440 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1441 | ||
1442 | } else { | |
1443 | /* Otherwise go word by word for the cache; should be low | |
1444 | * cost as we expect to hit the cache. | |
1445 | */ | |
1446 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1447 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1448 | &v); | |
b8fb5ab1 MB |
1449 | if (ret != 0) |
1450 | goto out; | |
1451 | ||
d939fb9a | 1452 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1453 | } |
1454 | } | |
b83a313b | 1455 | |
b8fb5ab1 | 1456 | out: |
0d4529c5 | 1457 | map->unlock(map->lock_arg); |
b83a313b MB |
1458 | |
1459 | return ret; | |
1460 | } | |
1461 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1462 | ||
1463 | /** | |
1464 | * regmap_bulk_read(): Read multiple registers from the device | |
1465 | * | |
1466 | * @map: Register map to write to | |
1467 | * @reg: First register to be read from | |
1468 | * @val: Pointer to store read value, in native register size for device | |
1469 | * @val_count: Number of registers to read | |
1470 | * | |
1471 | * A value of zero will be returned on success, a negative errno will | |
1472 | * be returned in error cases. | |
1473 | */ | |
1474 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1475 | size_t val_count) | |
1476 | { | |
1477 | int ret, i; | |
1478 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1479 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1480 | |
b83a313b MB |
1481 | if (!map->format.parse_val) |
1482 | return -EINVAL; | |
f01ee60f SW |
1483 | if (reg % map->reg_stride) |
1484 | return -EINVAL; | |
b83a313b | 1485 | |
de2d808f | 1486 | if (vol || map->cache_type == REGCACHE_NONE) { |
2e33caf1 AJ |
1487 | /* |
1488 | * Some devices does not support bulk read, for | |
1489 | * them we have a series of single read operations. | |
1490 | */ | |
1491 | if (map->use_single_rw) { | |
1492 | for (i = 0; i < val_count; i++) { | |
1493 | ret = regmap_raw_read(map, | |
1494 | reg + (i * map->reg_stride), | |
1495 | val + (i * val_bytes), | |
1496 | val_bytes); | |
1497 | if (ret != 0) | |
1498 | return ret; | |
1499 | } | |
1500 | } else { | |
1501 | ret = regmap_raw_read(map, reg, val, | |
1502 | val_bytes * val_count); | |
1503 | if (ret != 0) | |
1504 | return ret; | |
1505 | } | |
de2d808f MB |
1506 | |
1507 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
1508 | map->format.parse_val(val + i); | |
1509 | } else { | |
1510 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1511 | unsigned int ival; |
f01ee60f | 1512 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1513 | &ival); |
de2d808f MB |
1514 | if (ret != 0) |
1515 | return ret; | |
6560ffd1 | 1516 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1517 | } |
1518 | } | |
b83a313b MB |
1519 | |
1520 | return 0; | |
1521 | } | |
1522 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1523 | ||
018690d3 MB |
1524 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1525 | unsigned int mask, unsigned int val, | |
1526 | bool *change) | |
b83a313b MB |
1527 | { |
1528 | int ret; | |
d91e8db2 | 1529 | unsigned int tmp, orig; |
b83a313b | 1530 | |
d91e8db2 | 1531 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1532 | if (ret != 0) |
fc3ebd78 | 1533 | return ret; |
b83a313b | 1534 | |
d91e8db2 | 1535 | tmp = orig & ~mask; |
b83a313b MB |
1536 | tmp |= val & mask; |
1537 | ||
018690d3 | 1538 | if (tmp != orig) { |
d91e8db2 | 1539 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1540 | *change = true; |
1541 | } else { | |
1542 | *change = false; | |
1543 | } | |
b83a313b | 1544 | |
b83a313b MB |
1545 | return ret; |
1546 | } | |
018690d3 MB |
1547 | |
1548 | /** | |
1549 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1550 | * | |
1551 | * @map: Register map to update | |
1552 | * @reg: Register to update | |
1553 | * @mask: Bitmask to change | |
1554 | * @val: New value for bitmask | |
1555 | * | |
1556 | * Returns zero for success, a negative number on error. | |
1557 | */ | |
1558 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
1559 | unsigned int mask, unsigned int val) | |
1560 | { | |
1561 | bool change; | |
fc3ebd78 KG |
1562 | int ret; |
1563 | ||
0d4529c5 | 1564 | map->lock(map->lock_arg); |
fc3ebd78 | 1565 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 1566 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
1567 | |
1568 | return ret; | |
018690d3 | 1569 | } |
b83a313b | 1570 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 1571 | |
018690d3 MB |
1572 | /** |
1573 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
1574 | * register map and report if updated | |
1575 | * | |
1576 | * @map: Register map to update | |
1577 | * @reg: Register to update | |
1578 | * @mask: Bitmask to change | |
1579 | * @val: New value for bitmask | |
1580 | * @change: Boolean indicating if a write was done | |
1581 | * | |
1582 | * Returns zero for success, a negative number on error. | |
1583 | */ | |
1584 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
1585 | unsigned int mask, unsigned int val, | |
1586 | bool *change) | |
1587 | { | |
fc3ebd78 KG |
1588 | int ret; |
1589 | ||
0d4529c5 | 1590 | map->lock(map->lock_arg); |
fc3ebd78 | 1591 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 1592 | map->unlock(map->lock_arg); |
fc3ebd78 | 1593 | return ret; |
018690d3 MB |
1594 | } |
1595 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
1596 | ||
0d509f2b MB |
1597 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
1598 | { | |
1599 | struct regmap *map = async->map; | |
1600 | bool wake; | |
1601 | ||
1602 | spin_lock(&map->async_lock); | |
1603 | ||
1604 | list_del(&async->list); | |
1605 | wake = list_empty(&map->async_list); | |
1606 | ||
1607 | if (ret != 0) | |
1608 | map->async_ret = ret; | |
1609 | ||
1610 | spin_unlock(&map->async_lock); | |
1611 | ||
1612 | schedule_work(&async->cleanup); | |
1613 | ||
1614 | if (wake) | |
1615 | wake_up(&map->async_waitq); | |
1616 | } | |
1617 | ||
1618 | static int regmap_async_is_done(struct regmap *map) | |
1619 | { | |
1620 | unsigned long flags; | |
1621 | int ret; | |
1622 | ||
1623 | spin_lock_irqsave(&map->async_lock, flags); | |
1624 | ret = list_empty(&map->async_list); | |
1625 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1626 | ||
1627 | return ret; | |
1628 | } | |
1629 | ||
1630 | /** | |
1631 | * regmap_async_complete: Ensure all asynchronous I/O has completed. | |
1632 | * | |
1633 | * @map: Map to operate on. | |
1634 | * | |
1635 | * Blocks until any pending asynchronous I/O has completed. Returns | |
1636 | * an error code for any failed I/O operations. | |
1637 | */ | |
1638 | int regmap_async_complete(struct regmap *map) | |
1639 | { | |
1640 | unsigned long flags; | |
1641 | int ret; | |
1642 | ||
1643 | /* Nothing to do with no async support */ | |
1644 | if (!map->bus->async_write) | |
1645 | return 0; | |
1646 | ||
1647 | wait_event(map->async_waitq, regmap_async_is_done(map)); | |
1648 | ||
1649 | spin_lock_irqsave(&map->async_lock, flags); | |
1650 | ret = map->async_ret; | |
1651 | map->async_ret = 0; | |
1652 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1653 | ||
1654 | return ret; | |
1655 | } | |
1656 | ||
22f0d90a MB |
1657 | /** |
1658 | * regmap_register_patch: Register and apply register updates to be applied | |
1659 | * on device initialistion | |
1660 | * | |
1661 | * @map: Register map to apply updates to. | |
1662 | * @regs: Values to update. | |
1663 | * @num_regs: Number of entries in regs. | |
1664 | * | |
1665 | * Register a set of register updates to be applied to the device | |
1666 | * whenever the device registers are synchronised with the cache and | |
1667 | * apply them immediately. Typically this is used to apply | |
1668 | * corrections to be applied to the device defaults on startup, such | |
1669 | * as the updates some vendors provide to undocumented registers. | |
1670 | */ | |
1671 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
1672 | int num_regs) | |
1673 | { | |
1674 | int i, ret; | |
1675 | bool bypass; | |
1676 | ||
1677 | /* If needed the implementation can be extended to support this */ | |
1678 | if (map->patch) | |
1679 | return -EBUSY; | |
1680 | ||
0d4529c5 | 1681 | map->lock(map->lock_arg); |
22f0d90a MB |
1682 | |
1683 | bypass = map->cache_bypass; | |
1684 | ||
1685 | map->cache_bypass = true; | |
1686 | ||
1687 | /* Write out first; it's useful to apply even if we fail later. */ | |
1688 | for (i = 0; i < num_regs; i++) { | |
1689 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1690 | if (ret != 0) { | |
1691 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
1692 | regs[i].reg, regs[i].def, ret); | |
1693 | goto out; | |
1694 | } | |
1695 | } | |
1696 | ||
2a14d7d9 | 1697 | map->patch = kcalloc(num_regs, sizeof(struct reg_default), GFP_KERNEL); |
22f0d90a MB |
1698 | if (map->patch != NULL) { |
1699 | memcpy(map->patch, regs, | |
1700 | num_regs * sizeof(struct reg_default)); | |
1701 | map->patch_regs = num_regs; | |
1702 | } else { | |
1703 | ret = -ENOMEM; | |
1704 | } | |
1705 | ||
1706 | out: | |
1707 | map->cache_bypass = bypass; | |
1708 | ||
0d4529c5 | 1709 | map->unlock(map->lock_arg); |
22f0d90a MB |
1710 | |
1711 | return ret; | |
1712 | } | |
1713 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
1714 | ||
eae4b51b | 1715 | /* |
a6539c32 MB |
1716 | * regmap_get_val_bytes(): Report the size of a register value |
1717 | * | |
1718 | * Report the size of a register value, mainly intended to for use by | |
1719 | * generic infrastructure built on top of regmap. | |
1720 | */ | |
1721 | int regmap_get_val_bytes(struct regmap *map) | |
1722 | { | |
1723 | if (map->format.format_write) | |
1724 | return -EINVAL; | |
1725 | ||
1726 | return map->format.val_bytes; | |
1727 | } | |
1728 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
1729 | ||
31244e39 MB |
1730 | static int __init regmap_initcall(void) |
1731 | { | |
1732 | regmap_debugfs_initcall(); | |
1733 | ||
1734 | return 0; | |
1735 | } | |
1736 | postcore_initcall(regmap_initcall); |