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> |
30b2a553 | 19 | #include <linux/sched.h> |
b83a313b | 20 | |
fb2736bb MB |
21 | #define CREATE_TRACE_POINTS |
22 | #include <trace/events/regmap.h> | |
23 | ||
93de9124 | 24 | #include "internal.h" |
b83a313b | 25 | |
1044c180 MB |
26 | /* |
27 | * Sometimes for failures during very early init the trace | |
28 | * infrastructure isn't available early enough to be used. For this | |
29 | * sort of problem defining LOG_DEVICE will add printks for basic | |
30 | * register I/O on a specific device. | |
31 | */ | |
32 | #undef LOG_DEVICE | |
33 | ||
34 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
35 | unsigned int mask, unsigned int val, | |
36 | bool *change); | |
37 | ||
ad278406 AS |
38 | static int _regmap_bus_read(void *context, unsigned int reg, |
39 | unsigned int *val); | |
07c320dc AS |
40 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
41 | unsigned int val); | |
42 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
43 | unsigned int val); | |
ad278406 | 44 | |
76aad392 DC |
45 | bool regmap_reg_in_ranges(unsigned int reg, |
46 | const struct regmap_range *ranges, | |
47 | unsigned int nranges) | |
48 | { | |
49 | const struct regmap_range *r; | |
50 | int i; | |
51 | ||
52 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
53 | if (regmap_reg_in_range(reg, r)) | |
54 | return true; | |
55 | return false; | |
56 | } | |
57 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
58 | ||
154881e5 MB |
59 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
60 | const struct regmap_access_table *table) | |
76aad392 DC |
61 | { |
62 | /* Check "no ranges" first */ | |
63 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
64 | return false; | |
65 | ||
66 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
67 | if (!table->n_yes_ranges) | |
68 | return true; | |
69 | ||
70 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
71 | table->n_yes_ranges); | |
72 | } | |
154881e5 | 73 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
76aad392 | 74 | |
8de2f081 MB |
75 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
76 | { | |
77 | if (map->max_register && reg > map->max_register) | |
78 | return false; | |
79 | ||
80 | if (map->writeable_reg) | |
81 | return map->writeable_reg(map->dev, reg); | |
82 | ||
76aad392 | 83 | if (map->wr_table) |
154881e5 | 84 | return regmap_check_range_table(map, reg, map->wr_table); |
76aad392 | 85 | |
8de2f081 MB |
86 | return true; |
87 | } | |
88 | ||
89 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
90 | { | |
91 | if (map->max_register && reg > map->max_register) | |
92 | return false; | |
93 | ||
4191f197 WS |
94 | if (map->format.format_write) |
95 | return false; | |
96 | ||
8de2f081 MB |
97 | if (map->readable_reg) |
98 | return map->readable_reg(map->dev, reg); | |
99 | ||
76aad392 | 100 | if (map->rd_table) |
154881e5 | 101 | return regmap_check_range_table(map, reg, map->rd_table); |
76aad392 | 102 | |
8de2f081 MB |
103 | return true; |
104 | } | |
105 | ||
106 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
107 | { | |
4191f197 | 108 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
109 | return false; |
110 | ||
111 | if (map->volatile_reg) | |
112 | return map->volatile_reg(map->dev, reg); | |
113 | ||
76aad392 | 114 | if (map->volatile_table) |
154881e5 | 115 | return regmap_check_range_table(map, reg, map->volatile_table); |
76aad392 | 116 | |
b92be6fe MB |
117 | if (map->cache_ops) |
118 | return false; | |
119 | else | |
120 | return true; | |
8de2f081 MB |
121 | } |
122 | ||
123 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
124 | { | |
4191f197 | 125 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
126 | return false; |
127 | ||
128 | if (map->precious_reg) | |
129 | return map->precious_reg(map->dev, reg); | |
130 | ||
76aad392 | 131 | if (map->precious_table) |
154881e5 | 132 | return regmap_check_range_table(map, reg, map->precious_table); |
76aad392 | 133 | |
8de2f081 MB |
134 | return false; |
135 | } | |
136 | ||
82cd9965 | 137 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 138 | size_t num) |
82cd9965 LPC |
139 | { |
140 | unsigned int i; | |
141 | ||
142 | for (i = 0; i < num; i++) | |
143 | if (!regmap_volatile(map, reg + i)) | |
144 | return false; | |
145 | ||
146 | return true; | |
147 | } | |
148 | ||
9aa50750 WS |
149 | static void regmap_format_2_6_write(struct regmap *map, |
150 | unsigned int reg, unsigned int val) | |
151 | { | |
152 | u8 *out = map->work_buf; | |
153 | ||
154 | *out = (reg << 6) | val; | |
155 | } | |
156 | ||
b83a313b MB |
157 | static void regmap_format_4_12_write(struct regmap *map, |
158 | unsigned int reg, unsigned int val) | |
159 | { | |
160 | __be16 *out = map->work_buf; | |
161 | *out = cpu_to_be16((reg << 12) | val); | |
162 | } | |
163 | ||
164 | static void regmap_format_7_9_write(struct regmap *map, | |
165 | unsigned int reg, unsigned int val) | |
166 | { | |
167 | __be16 *out = map->work_buf; | |
168 | *out = cpu_to_be16((reg << 9) | val); | |
169 | } | |
170 | ||
7e5ec63e LPC |
171 | static void regmap_format_10_14_write(struct regmap *map, |
172 | unsigned int reg, unsigned int val) | |
173 | { | |
174 | u8 *out = map->work_buf; | |
175 | ||
176 | out[2] = val; | |
177 | out[1] = (val >> 8) | (reg << 6); | |
178 | out[0] = reg >> 2; | |
179 | } | |
180 | ||
d939fb9a | 181 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
182 | { |
183 | u8 *b = buf; | |
184 | ||
d939fb9a | 185 | b[0] = val << shift; |
b83a313b MB |
186 | } |
187 | ||
141eba2e | 188 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
189 | { |
190 | __be16 *b = buf; | |
191 | ||
d939fb9a | 192 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
193 | } |
194 | ||
141eba2e SW |
195 | static void regmap_format_16_native(void *buf, unsigned int val, |
196 | unsigned int shift) | |
197 | { | |
198 | *(u16 *)buf = val << shift; | |
199 | } | |
200 | ||
d939fb9a | 201 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
202 | { |
203 | u8 *b = buf; | |
204 | ||
d939fb9a MR |
205 | val <<= shift; |
206 | ||
ea279fc5 MR |
207 | b[0] = val >> 16; |
208 | b[1] = val >> 8; | |
209 | b[2] = val; | |
210 | } | |
211 | ||
141eba2e | 212 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
213 | { |
214 | __be32 *b = buf; | |
215 | ||
d939fb9a | 216 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
217 | } |
218 | ||
141eba2e SW |
219 | static void regmap_format_32_native(void *buf, unsigned int val, |
220 | unsigned int shift) | |
221 | { | |
222 | *(u32 *)buf = val << shift; | |
223 | } | |
224 | ||
8a819ff8 | 225 | static void regmap_parse_inplace_noop(void *buf) |
b83a313b | 226 | { |
8a819ff8 MB |
227 | } |
228 | ||
229 | static unsigned int regmap_parse_8(const void *buf) | |
230 | { | |
231 | const u8 *b = buf; | |
b83a313b MB |
232 | |
233 | return b[0]; | |
234 | } | |
235 | ||
8a819ff8 MB |
236 | static unsigned int regmap_parse_16_be(const void *buf) |
237 | { | |
238 | const __be16 *b = buf; | |
239 | ||
240 | return be16_to_cpu(b[0]); | |
241 | } | |
242 | ||
243 | static void regmap_parse_16_be_inplace(void *buf) | |
b83a313b MB |
244 | { |
245 | __be16 *b = buf; | |
246 | ||
247 | b[0] = be16_to_cpu(b[0]); | |
b83a313b MB |
248 | } |
249 | ||
8a819ff8 | 250 | static unsigned int regmap_parse_16_native(const void *buf) |
141eba2e SW |
251 | { |
252 | return *(u16 *)buf; | |
253 | } | |
254 | ||
8a819ff8 | 255 | static unsigned int regmap_parse_24(const void *buf) |
ea279fc5 | 256 | { |
8a819ff8 | 257 | const u8 *b = buf; |
ea279fc5 MR |
258 | unsigned int ret = b[2]; |
259 | ret |= ((unsigned int)b[1]) << 8; | |
260 | ret |= ((unsigned int)b[0]) << 16; | |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
8a819ff8 MB |
265 | static unsigned int regmap_parse_32_be(const void *buf) |
266 | { | |
267 | const __be32 *b = buf; | |
268 | ||
269 | return be32_to_cpu(b[0]); | |
270 | } | |
271 | ||
272 | static void regmap_parse_32_be_inplace(void *buf) | |
7d5e525b MB |
273 | { |
274 | __be32 *b = buf; | |
275 | ||
276 | b[0] = be32_to_cpu(b[0]); | |
7d5e525b MB |
277 | } |
278 | ||
8a819ff8 | 279 | static unsigned int regmap_parse_32_native(const void *buf) |
141eba2e SW |
280 | { |
281 | return *(u32 *)buf; | |
282 | } | |
283 | ||
0d4529c5 | 284 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 285 | { |
0d4529c5 | 286 | struct regmap *map = __map; |
bacdbe07 SW |
287 | mutex_lock(&map->mutex); |
288 | } | |
289 | ||
0d4529c5 | 290 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 291 | { |
0d4529c5 | 292 | struct regmap *map = __map; |
bacdbe07 SW |
293 | mutex_unlock(&map->mutex); |
294 | } | |
295 | ||
0d4529c5 | 296 | static void regmap_lock_spinlock(void *__map) |
b4519c71 | 297 | __acquires(&map->spinlock) |
bacdbe07 | 298 | { |
0d4529c5 | 299 | struct regmap *map = __map; |
92ab1aab LPC |
300 | unsigned long flags; |
301 | ||
302 | spin_lock_irqsave(&map->spinlock, flags); | |
303 | map->spinlock_flags = flags; | |
bacdbe07 SW |
304 | } |
305 | ||
0d4529c5 | 306 | static void regmap_unlock_spinlock(void *__map) |
b4519c71 | 307 | __releases(&map->spinlock) |
bacdbe07 | 308 | { |
0d4529c5 | 309 | struct regmap *map = __map; |
92ab1aab | 310 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
bacdbe07 SW |
311 | } |
312 | ||
72b39f6f MB |
313 | static void dev_get_regmap_release(struct device *dev, void *res) |
314 | { | |
315 | /* | |
316 | * We don't actually have anything to do here; the goal here | |
317 | * is not to manage the regmap but to provide a simple way to | |
318 | * get the regmap back given a struct device. | |
319 | */ | |
320 | } | |
321 | ||
6863ca62 KG |
322 | static bool _regmap_range_add(struct regmap *map, |
323 | struct regmap_range_node *data) | |
324 | { | |
325 | struct rb_root *root = &map->range_tree; | |
326 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
327 | ||
328 | while (*new) { | |
329 | struct regmap_range_node *this = | |
330 | container_of(*new, struct regmap_range_node, node); | |
331 | ||
332 | parent = *new; | |
333 | if (data->range_max < this->range_min) | |
334 | new = &((*new)->rb_left); | |
335 | else if (data->range_min > this->range_max) | |
336 | new = &((*new)->rb_right); | |
337 | else | |
338 | return false; | |
339 | } | |
340 | ||
341 | rb_link_node(&data->node, parent, new); | |
342 | rb_insert_color(&data->node, root); | |
343 | ||
344 | return true; | |
345 | } | |
346 | ||
347 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
348 | unsigned int reg) | |
349 | { | |
350 | struct rb_node *node = map->range_tree.rb_node; | |
351 | ||
352 | while (node) { | |
353 | struct regmap_range_node *this = | |
354 | container_of(node, struct regmap_range_node, node); | |
355 | ||
356 | if (reg < this->range_min) | |
357 | node = node->rb_left; | |
358 | else if (reg > this->range_max) | |
359 | node = node->rb_right; | |
360 | else | |
361 | return this; | |
362 | } | |
363 | ||
364 | return NULL; | |
365 | } | |
366 | ||
367 | static void regmap_range_exit(struct regmap *map) | |
368 | { | |
369 | struct rb_node *next; | |
370 | struct regmap_range_node *range_node; | |
371 | ||
372 | next = rb_first(&map->range_tree); | |
373 | while (next) { | |
374 | range_node = rb_entry(next, struct regmap_range_node, node); | |
375 | next = rb_next(&range_node->node); | |
376 | rb_erase(&range_node->node, &map->range_tree); | |
377 | kfree(range_node); | |
378 | } | |
379 | ||
380 | kfree(map->selector_work_buf); | |
381 | } | |
382 | ||
6cfec04b MS |
383 | int regmap_attach_dev(struct device *dev, struct regmap *map, |
384 | const struct regmap_config *config) | |
385 | { | |
386 | struct regmap **m; | |
387 | ||
388 | map->dev = dev; | |
389 | ||
390 | regmap_debugfs_init(map, config->name); | |
391 | ||
392 | /* Add a devres resource for dev_get_regmap() */ | |
393 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
394 | if (!m) { | |
395 | regmap_debugfs_exit(map); | |
396 | return -ENOMEM; | |
397 | } | |
398 | *m = map; | |
399 | devres_add(dev, m); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | EXPORT_SYMBOL_GPL(regmap_attach_dev); | |
404 | ||
b83a313b MB |
405 | /** |
406 | * regmap_init(): Initialise register map | |
407 | * | |
408 | * @dev: Device that will be interacted with | |
409 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 410 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
411 | * @config: Configuration for register map |
412 | * | |
413 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
414 | * a struct regmap. This function should generally not be called | |
415 | * directly, it should be called by bus-specific init functions. | |
416 | */ | |
417 | struct regmap *regmap_init(struct device *dev, | |
418 | const struct regmap_bus *bus, | |
0135bbcc | 419 | void *bus_context, |
b83a313b MB |
420 | const struct regmap_config *config) |
421 | { | |
6cfec04b | 422 | struct regmap *map; |
b83a313b | 423 | int ret = -EINVAL; |
141eba2e | 424 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 425 | int i, j; |
b83a313b | 426 | |
d2a5884a | 427 | if (!config) |
abbb18fb | 428 | goto err; |
b83a313b MB |
429 | |
430 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
431 | if (map == NULL) { | |
432 | ret = -ENOMEM; | |
433 | goto err; | |
434 | } | |
435 | ||
0d4529c5 DC |
436 | if (config->lock && config->unlock) { |
437 | map->lock = config->lock; | |
438 | map->unlock = config->unlock; | |
439 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 440 | } else { |
d2a5884a AS |
441 | if ((bus && bus->fast_io) || |
442 | config->fast_io) { | |
0d4529c5 DC |
443 | spin_lock_init(&map->spinlock); |
444 | map->lock = regmap_lock_spinlock; | |
445 | map->unlock = regmap_unlock_spinlock; | |
446 | } else { | |
447 | mutex_init(&map->mutex); | |
448 | map->lock = regmap_lock_mutex; | |
449 | map->unlock = regmap_unlock_mutex; | |
450 | } | |
451 | map->lock_arg = map; | |
bacdbe07 | 452 | } |
c212accc | 453 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 454 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 455 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
456 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
457 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 458 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
459 | if (config->reg_stride) |
460 | map->reg_stride = config->reg_stride; | |
461 | else | |
462 | map->reg_stride = 1; | |
2e33caf1 | 463 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
464 | map->dev = dev; |
465 | map->bus = bus; | |
0135bbcc | 466 | map->bus_context = bus_context; |
2e2ae66d | 467 | map->max_register = config->max_register; |
76aad392 DC |
468 | map->wr_table = config->wr_table; |
469 | map->rd_table = config->rd_table; | |
470 | map->volatile_table = config->volatile_table; | |
471 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
472 | map->writeable_reg = config->writeable_reg; |
473 | map->readable_reg = config->readable_reg; | |
474 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 475 | map->precious_reg = config->precious_reg; |
5d1729e7 | 476 | map->cache_type = config->cache_type; |
72b39f6f | 477 | map->name = config->name; |
b83a313b | 478 | |
0d509f2b MB |
479 | spin_lock_init(&map->async_lock); |
480 | INIT_LIST_HEAD(&map->async_list); | |
7e09a979 | 481 | INIT_LIST_HEAD(&map->async_free); |
0d509f2b MB |
482 | init_waitqueue_head(&map->async_waitq); |
483 | ||
6f306441 LPC |
484 | if (config->read_flag_mask || config->write_flag_mask) { |
485 | map->read_flag_mask = config->read_flag_mask; | |
486 | map->write_flag_mask = config->write_flag_mask; | |
d2a5884a | 487 | } else if (bus) { |
6f306441 LPC |
488 | map->read_flag_mask = bus->read_flag_mask; |
489 | } | |
490 | ||
d2a5884a AS |
491 | if (!bus) { |
492 | map->reg_read = config->reg_read; | |
493 | map->reg_write = config->reg_write; | |
494 | ||
495 | map->defer_caching = false; | |
496 | goto skip_format_initialization; | |
497 | } else { | |
498 | map->reg_read = _regmap_bus_read; | |
499 | } | |
ad278406 | 500 | |
141eba2e SW |
501 | reg_endian = config->reg_format_endian; |
502 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
503 | reg_endian = bus->reg_format_endian_default; | |
504 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
505 | reg_endian = REGMAP_ENDIAN_BIG; | |
506 | ||
507 | val_endian = config->val_format_endian; | |
508 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
509 | val_endian = bus->val_format_endian_default; | |
510 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
511 | val_endian = REGMAP_ENDIAN_BIG; | |
512 | ||
d939fb9a | 513 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
514 | case 2: |
515 | switch (config->val_bits) { | |
516 | case 6: | |
517 | map->format.format_write = regmap_format_2_6_write; | |
518 | break; | |
519 | default: | |
520 | goto err_map; | |
521 | } | |
522 | break; | |
523 | ||
b83a313b MB |
524 | case 4: |
525 | switch (config->val_bits) { | |
526 | case 12: | |
527 | map->format.format_write = regmap_format_4_12_write; | |
528 | break; | |
529 | default: | |
530 | goto err_map; | |
531 | } | |
532 | break; | |
533 | ||
534 | case 7: | |
535 | switch (config->val_bits) { | |
536 | case 9: | |
537 | map->format.format_write = regmap_format_7_9_write; | |
538 | break; | |
539 | default: | |
540 | goto err_map; | |
541 | } | |
542 | break; | |
543 | ||
7e5ec63e LPC |
544 | case 10: |
545 | switch (config->val_bits) { | |
546 | case 14: | |
547 | map->format.format_write = regmap_format_10_14_write; | |
548 | break; | |
549 | default: | |
550 | goto err_map; | |
551 | } | |
552 | break; | |
553 | ||
b83a313b MB |
554 | case 8: |
555 | map->format.format_reg = regmap_format_8; | |
556 | break; | |
557 | ||
558 | case 16: | |
141eba2e SW |
559 | switch (reg_endian) { |
560 | case REGMAP_ENDIAN_BIG: | |
561 | map->format.format_reg = regmap_format_16_be; | |
562 | break; | |
563 | case REGMAP_ENDIAN_NATIVE: | |
564 | map->format.format_reg = regmap_format_16_native; | |
565 | break; | |
566 | default: | |
567 | goto err_map; | |
568 | } | |
b83a313b MB |
569 | break; |
570 | ||
237019e7 LPC |
571 | case 24: |
572 | if (reg_endian != REGMAP_ENDIAN_BIG) | |
573 | goto err_map; | |
574 | map->format.format_reg = regmap_format_24; | |
575 | break; | |
576 | ||
7d5e525b | 577 | case 32: |
141eba2e SW |
578 | switch (reg_endian) { |
579 | case REGMAP_ENDIAN_BIG: | |
580 | map->format.format_reg = regmap_format_32_be; | |
581 | break; | |
582 | case REGMAP_ENDIAN_NATIVE: | |
583 | map->format.format_reg = regmap_format_32_native; | |
584 | break; | |
585 | default: | |
586 | goto err_map; | |
587 | } | |
7d5e525b MB |
588 | break; |
589 | ||
b83a313b MB |
590 | default: |
591 | goto err_map; | |
592 | } | |
593 | ||
8a819ff8 MB |
594 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
595 | map->format.parse_inplace = regmap_parse_inplace_noop; | |
596 | ||
b83a313b MB |
597 | switch (config->val_bits) { |
598 | case 8: | |
599 | map->format.format_val = regmap_format_8; | |
600 | map->format.parse_val = regmap_parse_8; | |
8a819ff8 | 601 | map->format.parse_inplace = regmap_parse_inplace_noop; |
b83a313b MB |
602 | break; |
603 | case 16: | |
141eba2e SW |
604 | switch (val_endian) { |
605 | case REGMAP_ENDIAN_BIG: | |
606 | map->format.format_val = regmap_format_16_be; | |
607 | map->format.parse_val = regmap_parse_16_be; | |
8a819ff8 | 608 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
141eba2e SW |
609 | break; |
610 | case REGMAP_ENDIAN_NATIVE: | |
611 | map->format.format_val = regmap_format_16_native; | |
612 | map->format.parse_val = regmap_parse_16_native; | |
613 | break; | |
614 | default: | |
615 | goto err_map; | |
616 | } | |
b83a313b | 617 | break; |
ea279fc5 | 618 | case 24: |
141eba2e SW |
619 | if (val_endian != REGMAP_ENDIAN_BIG) |
620 | goto err_map; | |
ea279fc5 MR |
621 | map->format.format_val = regmap_format_24; |
622 | map->format.parse_val = regmap_parse_24; | |
623 | break; | |
7d5e525b | 624 | case 32: |
141eba2e SW |
625 | switch (val_endian) { |
626 | case REGMAP_ENDIAN_BIG: | |
627 | map->format.format_val = regmap_format_32_be; | |
628 | map->format.parse_val = regmap_parse_32_be; | |
8a819ff8 | 629 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
141eba2e SW |
630 | break; |
631 | case REGMAP_ENDIAN_NATIVE: | |
632 | map->format.format_val = regmap_format_32_native; | |
633 | map->format.parse_val = regmap_parse_32_native; | |
634 | break; | |
635 | default: | |
636 | goto err_map; | |
637 | } | |
7d5e525b | 638 | break; |
b83a313b MB |
639 | } |
640 | ||
141eba2e SW |
641 | if (map->format.format_write) { |
642 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
643 | (val_endian != REGMAP_ENDIAN_BIG)) | |
644 | goto err_map; | |
7a647614 | 645 | map->use_single_rw = true; |
141eba2e | 646 | } |
7a647614 | 647 | |
b83a313b MB |
648 | if (!map->format.format_write && |
649 | !(map->format.format_reg && map->format.format_val)) | |
650 | goto err_map; | |
651 | ||
82159ba8 | 652 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
653 | if (map->work_buf == NULL) { |
654 | ret = -ENOMEM; | |
5204f5e3 | 655 | goto err_map; |
b83a313b MB |
656 | } |
657 | ||
d2a5884a AS |
658 | if (map->format.format_write) { |
659 | map->defer_caching = false; | |
07c320dc | 660 | map->reg_write = _regmap_bus_formatted_write; |
d2a5884a AS |
661 | } else if (map->format.format_val) { |
662 | map->defer_caching = true; | |
07c320dc | 663 | map->reg_write = _regmap_bus_raw_write; |
d2a5884a AS |
664 | } |
665 | ||
666 | skip_format_initialization: | |
07c320dc | 667 | |
6863ca62 | 668 | map->range_tree = RB_ROOT; |
e3549cd0 | 669 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
670 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
671 | struct regmap_range_node *new; | |
672 | ||
673 | /* Sanity check */ | |
061adc06 MB |
674 | if (range_cfg->range_max < range_cfg->range_min) { |
675 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
676 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 677 | goto err_range; |
061adc06 MB |
678 | } |
679 | ||
680 | if (range_cfg->range_max > map->max_register) { | |
681 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
682 | range_cfg->range_max, map->max_register); | |
683 | goto err_range; | |
684 | } | |
685 | ||
686 | if (range_cfg->selector_reg > map->max_register) { | |
687 | dev_err(map->dev, | |
688 | "Invalid range %d: selector out of map\n", i); | |
689 | goto err_range; | |
690 | } | |
691 | ||
692 | if (range_cfg->window_len == 0) { | |
693 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
694 | i); | |
695 | goto err_range; | |
696 | } | |
6863ca62 KG |
697 | |
698 | /* Make sure, that this register range has no selector | |
699 | or data window within its boundary */ | |
e3549cd0 | 700 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
701 | unsigned sel_reg = config->ranges[j].selector_reg; |
702 | unsigned win_min = config->ranges[j].window_start; | |
703 | unsigned win_max = win_min + | |
704 | config->ranges[j].window_len - 1; | |
705 | ||
f161d220 PZ |
706 | /* Allow data window inside its own virtual range */ |
707 | if (j == i) | |
708 | continue; | |
709 | ||
6863ca62 KG |
710 | if (range_cfg->range_min <= sel_reg && |
711 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
712 | dev_err(map->dev, |
713 | "Range %d: selector for %d in window\n", | |
714 | i, j); | |
6863ca62 KG |
715 | goto err_range; |
716 | } | |
717 | ||
718 | if (!(win_max < range_cfg->range_min || | |
719 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
720 | dev_err(map->dev, |
721 | "Range %d: window for %d in window\n", | |
722 | i, j); | |
6863ca62 KG |
723 | goto err_range; |
724 | } | |
725 | } | |
726 | ||
727 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
728 | if (new == NULL) { | |
729 | ret = -ENOMEM; | |
730 | goto err_range; | |
731 | } | |
732 | ||
4b020b3f | 733 | new->map = map; |
d058bb49 | 734 | new->name = range_cfg->name; |
6863ca62 KG |
735 | new->range_min = range_cfg->range_min; |
736 | new->range_max = range_cfg->range_max; | |
737 | new->selector_reg = range_cfg->selector_reg; | |
738 | new->selector_mask = range_cfg->selector_mask; | |
739 | new->selector_shift = range_cfg->selector_shift; | |
740 | new->window_start = range_cfg->window_start; | |
741 | new->window_len = range_cfg->window_len; | |
742 | ||
743 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 744 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
745 | kfree(new); |
746 | goto err_range; | |
747 | } | |
748 | ||
749 | if (map->selector_work_buf == NULL) { | |
750 | map->selector_work_buf = | |
751 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
752 | if (map->selector_work_buf == NULL) { | |
753 | ret = -ENOMEM; | |
754 | goto err_range; | |
755 | } | |
756 | } | |
757 | } | |
052d2cd1 | 758 | |
e5e3b8ab | 759 | ret = regcache_init(map, config); |
0ff3e62f | 760 | if (ret != 0) |
6863ca62 KG |
761 | goto err_range; |
762 | ||
6cfec04b MS |
763 | if (dev) |
764 | ret = regmap_attach_dev(dev, map, config); | |
765 | if (ret != 0) | |
766 | goto err_regcache; | |
72b39f6f | 767 | |
b83a313b MB |
768 | return map; |
769 | ||
6cfec04b | 770 | err_regcache: |
72b39f6f | 771 | regcache_exit(map); |
6863ca62 KG |
772 | err_range: |
773 | regmap_range_exit(map); | |
58072cbf | 774 | kfree(map->work_buf); |
b83a313b MB |
775 | err_map: |
776 | kfree(map); | |
777 | err: | |
778 | return ERR_PTR(ret); | |
779 | } | |
780 | EXPORT_SYMBOL_GPL(regmap_init); | |
781 | ||
c0eb4676 MB |
782 | static void devm_regmap_release(struct device *dev, void *res) |
783 | { | |
784 | regmap_exit(*(struct regmap **)res); | |
785 | } | |
786 | ||
787 | /** | |
788 | * devm_regmap_init(): Initialise managed register map | |
789 | * | |
790 | * @dev: Device that will be interacted with | |
791 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 792 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
793 | * @config: Configuration for register map |
794 | * | |
795 | * The return value will be an ERR_PTR() on error or a valid pointer | |
796 | * to a struct regmap. This function should generally not be called | |
797 | * directly, it should be called by bus-specific init functions. The | |
798 | * map will be automatically freed by the device management code. | |
799 | */ | |
800 | struct regmap *devm_regmap_init(struct device *dev, | |
801 | const struct regmap_bus *bus, | |
0135bbcc | 802 | void *bus_context, |
c0eb4676 MB |
803 | const struct regmap_config *config) |
804 | { | |
805 | struct regmap **ptr, *regmap; | |
806 | ||
807 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
808 | if (!ptr) | |
809 | return ERR_PTR(-ENOMEM); | |
810 | ||
0135bbcc | 811 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
812 | if (!IS_ERR(regmap)) { |
813 | *ptr = regmap; | |
814 | devres_add(dev, ptr); | |
815 | } else { | |
816 | devres_free(ptr); | |
817 | } | |
818 | ||
819 | return regmap; | |
820 | } | |
821 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
822 | ||
67252287 SK |
823 | static void regmap_field_init(struct regmap_field *rm_field, |
824 | struct regmap *regmap, struct reg_field reg_field) | |
825 | { | |
826 | int field_bits = reg_field.msb - reg_field.lsb + 1; | |
827 | rm_field->regmap = regmap; | |
828 | rm_field->reg = reg_field.reg; | |
829 | rm_field->shift = reg_field.lsb; | |
830 | rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb); | |
a0102375 KM |
831 | rm_field->id_size = reg_field.id_size; |
832 | rm_field->id_offset = reg_field.id_offset; | |
67252287 SK |
833 | } |
834 | ||
835 | /** | |
836 | * devm_regmap_field_alloc(): Allocate and initialise a register field | |
837 | * in a register map. | |
838 | * | |
839 | * @dev: Device that will be interacted with | |
840 | * @regmap: regmap bank in which this register field is located. | |
841 | * @reg_field: Register field with in the bank. | |
842 | * | |
843 | * The return value will be an ERR_PTR() on error or a valid pointer | |
844 | * to a struct regmap_field. The regmap_field will be automatically freed | |
845 | * by the device management code. | |
846 | */ | |
847 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, | |
848 | struct regmap *regmap, struct reg_field reg_field) | |
849 | { | |
850 | struct regmap_field *rm_field = devm_kzalloc(dev, | |
851 | sizeof(*rm_field), GFP_KERNEL); | |
852 | if (!rm_field) | |
853 | return ERR_PTR(-ENOMEM); | |
854 | ||
855 | regmap_field_init(rm_field, regmap, reg_field); | |
856 | ||
857 | return rm_field; | |
858 | ||
859 | } | |
860 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); | |
861 | ||
862 | /** | |
863 | * devm_regmap_field_free(): Free register field allocated using | |
864 | * devm_regmap_field_alloc. Usally drivers need not call this function, | |
865 | * as the memory allocated via devm will be freed as per device-driver | |
866 | * life-cyle. | |
867 | * | |
868 | * @dev: Device that will be interacted with | |
869 | * @field: regmap field which should be freed. | |
870 | */ | |
871 | void devm_regmap_field_free(struct device *dev, | |
872 | struct regmap_field *field) | |
873 | { | |
874 | devm_kfree(dev, field); | |
875 | } | |
876 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); | |
877 | ||
878 | /** | |
879 | * regmap_field_alloc(): Allocate and initialise a register field | |
880 | * in a register map. | |
881 | * | |
882 | * @regmap: regmap bank in which this register field is located. | |
883 | * @reg_field: Register field with in the bank. | |
884 | * | |
885 | * The return value will be an ERR_PTR() on error or a valid pointer | |
886 | * to a struct regmap_field. The regmap_field should be freed by the | |
887 | * user once its finished working with it using regmap_field_free(). | |
888 | */ | |
889 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, | |
890 | struct reg_field reg_field) | |
891 | { | |
892 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); | |
893 | ||
894 | if (!rm_field) | |
895 | return ERR_PTR(-ENOMEM); | |
896 | ||
897 | regmap_field_init(rm_field, regmap, reg_field); | |
898 | ||
899 | return rm_field; | |
900 | } | |
901 | EXPORT_SYMBOL_GPL(regmap_field_alloc); | |
902 | ||
903 | /** | |
904 | * regmap_field_free(): Free register field allocated using regmap_field_alloc | |
905 | * | |
906 | * @field: regmap field which should be freed. | |
907 | */ | |
908 | void regmap_field_free(struct regmap_field *field) | |
909 | { | |
910 | kfree(field); | |
911 | } | |
912 | EXPORT_SYMBOL_GPL(regmap_field_free); | |
913 | ||
bf315173 MB |
914 | /** |
915 | * regmap_reinit_cache(): Reinitialise the current register cache | |
916 | * | |
917 | * @map: Register map to operate on. | |
918 | * @config: New configuration. Only the cache data will be used. | |
919 | * | |
920 | * Discard any existing register cache for the map and initialize a | |
921 | * new cache. This can be used to restore the cache to defaults or to | |
922 | * update the cache configuration to reflect runtime discovery of the | |
923 | * hardware. | |
4d879514 DP |
924 | * |
925 | * No explicit locking is done here, the user needs to ensure that | |
926 | * this function will not race with other calls to regmap. | |
bf315173 MB |
927 | */ |
928 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
929 | { | |
bf315173 | 930 | regcache_exit(map); |
a24f64a6 | 931 | regmap_debugfs_exit(map); |
bf315173 MB |
932 | |
933 | map->max_register = config->max_register; | |
934 | map->writeable_reg = config->writeable_reg; | |
935 | map->readable_reg = config->readable_reg; | |
936 | map->volatile_reg = config->volatile_reg; | |
937 | map->precious_reg = config->precious_reg; | |
938 | map->cache_type = config->cache_type; | |
939 | ||
d3c242e1 | 940 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 941 | |
421e8d2d MB |
942 | map->cache_bypass = false; |
943 | map->cache_only = false; | |
944 | ||
4d879514 | 945 | return regcache_init(map, config); |
bf315173 | 946 | } |
752a6a5f | 947 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 948 | |
b83a313b MB |
949 | /** |
950 | * regmap_exit(): Free a previously allocated register map | |
951 | */ | |
952 | void regmap_exit(struct regmap *map) | |
953 | { | |
7e09a979 MB |
954 | struct regmap_async *async; |
955 | ||
5d1729e7 | 956 | regcache_exit(map); |
31244e39 | 957 | regmap_debugfs_exit(map); |
6863ca62 | 958 | regmap_range_exit(map); |
d2a5884a | 959 | if (map->bus && map->bus->free_context) |
0135bbcc | 960 | map->bus->free_context(map->bus_context); |
b83a313b | 961 | kfree(map->work_buf); |
7e09a979 MB |
962 | while (!list_empty(&map->async_free)) { |
963 | async = list_first_entry_or_null(&map->async_free, | |
964 | struct regmap_async, | |
965 | list); | |
966 | list_del(&async->list); | |
967 | kfree(async->work_buf); | |
968 | kfree(async); | |
969 | } | |
b83a313b MB |
970 | kfree(map); |
971 | } | |
972 | EXPORT_SYMBOL_GPL(regmap_exit); | |
973 | ||
72b39f6f MB |
974 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
975 | { | |
976 | struct regmap **r = res; | |
977 | if (!r || !*r) { | |
978 | WARN_ON(!r || !*r); | |
979 | return 0; | |
980 | } | |
981 | ||
982 | /* If the user didn't specify a name match any */ | |
983 | if (data) | |
984 | return (*r)->name == data; | |
985 | else | |
986 | return 1; | |
987 | } | |
988 | ||
989 | /** | |
990 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
991 | * | |
992 | * @dev: Device to retrieve the map for | |
993 | * @name: Optional name for the register map, usually NULL. | |
994 | * | |
995 | * Returns the regmap for the device if one is present, or NULL. If | |
996 | * name is specified then it must match the name specified when | |
997 | * registering the device, if it is NULL then the first regmap found | |
998 | * will be used. Devices with multiple register maps are very rare, | |
999 | * generic code should normally not need to specify a name. | |
1000 | */ | |
1001 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
1002 | { | |
1003 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
1004 | dev_get_regmap_match, (void *)name); | |
1005 | ||
1006 | if (!r) | |
1007 | return NULL; | |
1008 | return *r; | |
1009 | } | |
1010 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
1011 | ||
6863ca62 | 1012 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 1013 | struct regmap_range_node *range, |
6863ca62 KG |
1014 | unsigned int val_num) |
1015 | { | |
6863ca62 KG |
1016 | void *orig_work_buf; |
1017 | unsigned int win_offset; | |
1018 | unsigned int win_page; | |
1019 | bool page_chg; | |
1020 | int ret; | |
1021 | ||
98bc7dfd MB |
1022 | win_offset = (*reg - range->range_min) % range->window_len; |
1023 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 1024 | |
98bc7dfd MB |
1025 | if (val_num > 1) { |
1026 | /* Bulk write shouldn't cross range boundary */ | |
1027 | if (*reg + val_num - 1 > range->range_max) | |
1028 | return -EINVAL; | |
6863ca62 | 1029 | |
98bc7dfd MB |
1030 | /* ... or single page boundary */ |
1031 | if (val_num > range->window_len - win_offset) | |
1032 | return -EINVAL; | |
1033 | } | |
6863ca62 | 1034 | |
98bc7dfd MB |
1035 | /* It is possible to have selector register inside data window. |
1036 | In that case, selector register is located on every page and | |
1037 | it needs no page switching, when accessed alone. */ | |
1038 | if (val_num > 1 || | |
1039 | range->window_start + win_offset != range->selector_reg) { | |
1040 | /* Use separate work_buf during page switching */ | |
1041 | orig_work_buf = map->work_buf; | |
1042 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 1043 | |
98bc7dfd MB |
1044 | ret = _regmap_update_bits(map, range->selector_reg, |
1045 | range->selector_mask, | |
1046 | win_page << range->selector_shift, | |
1047 | &page_chg); | |
632a5b01 | 1048 | |
98bc7dfd | 1049 | map->work_buf = orig_work_buf; |
6863ca62 | 1050 | |
0ff3e62f | 1051 | if (ret != 0) |
98bc7dfd | 1052 | return ret; |
6863ca62 KG |
1053 | } |
1054 | ||
98bc7dfd MB |
1055 | *reg = range->window_start + win_offset; |
1056 | ||
6863ca62 KG |
1057 | return 0; |
1058 | } | |
1059 | ||
584de329 | 1060 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
0a819809 | 1061 | const void *val, size_t val_len) |
b83a313b | 1062 | { |
98bc7dfd | 1063 | struct regmap_range_node *range; |
0d509f2b | 1064 | unsigned long flags; |
6f306441 | 1065 | u8 *u8 = map->work_buf; |
0d509f2b MB |
1066 | void *work_val = map->work_buf + map->format.reg_bytes + |
1067 | map->format.pad_bytes; | |
b83a313b MB |
1068 | void *buf; |
1069 | int ret = -ENOTSUPP; | |
1070 | size_t len; | |
73304781 MB |
1071 | int i; |
1072 | ||
f1b5c5c3 | 1073 | WARN_ON(!map->bus); |
d2a5884a | 1074 | |
73304781 MB |
1075 | /* Check for unwritable registers before we start */ |
1076 | if (map->writeable_reg) | |
1077 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
1078 | if (!map->writeable_reg(map->dev, |
1079 | reg + (i * map->reg_stride))) | |
73304781 | 1080 | return -EINVAL; |
b83a313b | 1081 | |
c9157198 LD |
1082 | if (!map->cache_bypass && map->format.parse_val) { |
1083 | unsigned int ival; | |
1084 | int val_bytes = map->format.val_bytes; | |
1085 | for (i = 0; i < val_len / val_bytes; i++) { | |
5a08d156 | 1086 | ival = map->format.parse_val(val + (i * val_bytes)); |
f01ee60f SW |
1087 | ret = regcache_write(map, reg + (i * map->reg_stride), |
1088 | ival); | |
c9157198 LD |
1089 | if (ret) { |
1090 | dev_err(map->dev, | |
6d04b8ac | 1091 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
1092 | reg + i, ret); |
1093 | return ret; | |
1094 | } | |
1095 | } | |
1096 | if (map->cache_only) { | |
1097 | map->cache_dirty = true; | |
1098 | return 0; | |
1099 | } | |
1100 | } | |
1101 | ||
98bc7dfd MB |
1102 | range = _regmap_range_lookup(map, reg); |
1103 | if (range) { | |
8a2ceac6 MB |
1104 | int val_num = val_len / map->format.val_bytes; |
1105 | int win_offset = (reg - range->range_min) % range->window_len; | |
1106 | int win_residue = range->window_len - win_offset; | |
1107 | ||
1108 | /* If the write goes beyond the end of the window split it */ | |
1109 | while (val_num > win_residue) { | |
1a61cfe3 | 1110 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
1111 | win_residue, val_len / map->format.val_bytes); |
1112 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
0a819809 | 1113 | map->format.val_bytes); |
8a2ceac6 MB |
1114 | if (ret != 0) |
1115 | return ret; | |
1116 | ||
1117 | reg += win_residue; | |
1118 | val_num -= win_residue; | |
1119 | val += win_residue * map->format.val_bytes; | |
1120 | val_len -= win_residue * map->format.val_bytes; | |
1121 | ||
1122 | win_offset = (reg - range->range_min) % | |
1123 | range->window_len; | |
1124 | win_residue = range->window_len - win_offset; | |
1125 | } | |
1126 | ||
1127 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 1128 | if (ret != 0) |
98bc7dfd MB |
1129 | return ret; |
1130 | } | |
6863ca62 | 1131 | |
d939fb9a | 1132 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 1133 | |
6f306441 LPC |
1134 | u8[0] |= map->write_flag_mask; |
1135 | ||
651e013e MB |
1136 | /* |
1137 | * Essentially all I/O mechanisms will be faster with a single | |
1138 | * buffer to write. Since register syncs often generate raw | |
1139 | * writes of single registers optimise that case. | |
1140 | */ | |
1141 | if (val != work_val && val_len == map->format.val_bytes) { | |
1142 | memcpy(work_val, val, map->format.val_bytes); | |
1143 | val = work_val; | |
1144 | } | |
1145 | ||
0a819809 | 1146 | if (map->async && map->bus->async_write) { |
7e09a979 | 1147 | struct regmap_async *async; |
0d509f2b | 1148 | |
fe7d4ccd MB |
1149 | trace_regmap_async_write_start(map->dev, reg, val_len); |
1150 | ||
7e09a979 MB |
1151 | spin_lock_irqsave(&map->async_lock, flags); |
1152 | async = list_first_entry_or_null(&map->async_free, | |
1153 | struct regmap_async, | |
1154 | list); | |
1155 | if (async) | |
1156 | list_del(&async->list); | |
1157 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1158 | ||
1159 | if (!async) { | |
1160 | async = map->bus->async_alloc(); | |
1161 | if (!async) | |
1162 | return -ENOMEM; | |
1163 | ||
1164 | async->work_buf = kzalloc(map->format.buf_size, | |
1165 | GFP_KERNEL | GFP_DMA); | |
1166 | if (!async->work_buf) { | |
1167 | kfree(async); | |
1168 | return -ENOMEM; | |
1169 | } | |
0d509f2b MB |
1170 | } |
1171 | ||
0d509f2b MB |
1172 | async->map = map; |
1173 | ||
1174 | /* If the caller supplied the value we can use it safely. */ | |
1175 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + | |
1176 | map->format.reg_bytes + map->format.val_bytes); | |
0d509f2b MB |
1177 | |
1178 | spin_lock_irqsave(&map->async_lock, flags); | |
1179 | list_add_tail(&async->list, &map->async_list); | |
1180 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1181 | ||
04c50ccf MB |
1182 | if (val != work_val) |
1183 | ret = map->bus->async_write(map->bus_context, | |
1184 | async->work_buf, | |
1185 | map->format.reg_bytes + | |
1186 | map->format.pad_bytes, | |
1187 | val, val_len, async); | |
1188 | else | |
1189 | ret = map->bus->async_write(map->bus_context, | |
1190 | async->work_buf, | |
1191 | map->format.reg_bytes + | |
1192 | map->format.pad_bytes + | |
1193 | val_len, NULL, 0, async); | |
0d509f2b MB |
1194 | |
1195 | if (ret != 0) { | |
1196 | dev_err(map->dev, "Failed to schedule write: %d\n", | |
1197 | ret); | |
1198 | ||
1199 | spin_lock_irqsave(&map->async_lock, flags); | |
7e09a979 | 1200 | list_move(&async->list, &map->async_free); |
0d509f2b | 1201 | spin_unlock_irqrestore(&map->async_lock, flags); |
0d509f2b | 1202 | } |
f951b658 MB |
1203 | |
1204 | return ret; | |
0d509f2b MB |
1205 | } |
1206 | ||
fb2736bb MB |
1207 | trace_regmap_hw_write_start(map->dev, reg, |
1208 | val_len / map->format.val_bytes); | |
1209 | ||
2547e201 MB |
1210 | /* If we're doing a single register write we can probably just |
1211 | * send the work_buf directly, otherwise try to do a gather | |
1212 | * write. | |
1213 | */ | |
0d509f2b | 1214 | if (val == work_val) |
0135bbcc | 1215 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
1216 | map->format.reg_bytes + |
1217 | map->format.pad_bytes + | |
1218 | val_len); | |
2547e201 | 1219 | else if (map->bus->gather_write) |
0135bbcc | 1220 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
1221 | map->format.reg_bytes + |
1222 | map->format.pad_bytes, | |
b83a313b MB |
1223 | val, val_len); |
1224 | ||
2547e201 | 1225 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 1226 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
1227 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
1228 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
1229 | if (!buf) |
1230 | return -ENOMEM; | |
1231 | ||
1232 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
1233 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
1234 | val, val_len); | |
0135bbcc | 1235 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
1236 | |
1237 | kfree(buf); | |
1238 | } | |
1239 | ||
fb2736bb MB |
1240 | trace_regmap_hw_write_done(map->dev, reg, |
1241 | val_len / map->format.val_bytes); | |
1242 | ||
b83a313b MB |
1243 | return ret; |
1244 | } | |
1245 | ||
221ad7f2 MB |
1246 | /** |
1247 | * regmap_can_raw_write - Test if regmap_raw_write() is supported | |
1248 | * | |
1249 | * @map: Map to check. | |
1250 | */ | |
1251 | bool regmap_can_raw_write(struct regmap *map) | |
1252 | { | |
1253 | return map->bus && map->format.format_val && map->format.format_reg; | |
1254 | } | |
1255 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); | |
1256 | ||
07c320dc AS |
1257 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
1258 | unsigned int val) | |
1259 | { | |
1260 | int ret; | |
1261 | struct regmap_range_node *range; | |
1262 | struct regmap *map = context; | |
1263 | ||
f1b5c5c3 | 1264 | WARN_ON(!map->bus || !map->format.format_write); |
07c320dc AS |
1265 | |
1266 | range = _regmap_range_lookup(map, reg); | |
1267 | if (range) { | |
1268 | ret = _regmap_select_page(map, ®, range, 1); | |
1269 | if (ret != 0) | |
1270 | return ret; | |
1271 | } | |
1272 | ||
1273 | map->format.format_write(map, reg, val); | |
1274 | ||
1275 | trace_regmap_hw_write_start(map->dev, reg, 1); | |
1276 | ||
1277 | ret = map->bus->write(map->bus_context, map->work_buf, | |
1278 | map->format.buf_size); | |
1279 | ||
1280 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1281 | ||
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
1286 | unsigned int val) | |
1287 | { | |
1288 | struct regmap *map = context; | |
1289 | ||
f1b5c5c3 | 1290 | WARN_ON(!map->bus || !map->format.format_val); |
07c320dc AS |
1291 | |
1292 | map->format.format_val(map->work_buf + map->format.reg_bytes | |
1293 | + map->format.pad_bytes, val, 0); | |
1294 | return _regmap_raw_write(map, reg, | |
1295 | map->work_buf + | |
1296 | map->format.reg_bytes + | |
1297 | map->format.pad_bytes, | |
0a819809 | 1298 | map->format.val_bytes); |
07c320dc AS |
1299 | } |
1300 | ||
d2a5884a AS |
1301 | static inline void *_regmap_map_get_context(struct regmap *map) |
1302 | { | |
1303 | return (map->bus) ? map : map->bus_context; | |
1304 | } | |
1305 | ||
4d2dc095 DP |
1306 | int _regmap_write(struct regmap *map, unsigned int reg, |
1307 | unsigned int val) | |
b83a313b | 1308 | { |
fb2736bb | 1309 | int ret; |
d2a5884a | 1310 | void *context = _regmap_map_get_context(map); |
b83a313b | 1311 | |
515f2261 IN |
1312 | if (!regmap_writeable(map, reg)) |
1313 | return -EIO; | |
1314 | ||
d2a5884a | 1315 | if (!map->cache_bypass && !map->defer_caching) { |
5d1729e7 DP |
1316 | ret = regcache_write(map, reg, val); |
1317 | if (ret != 0) | |
1318 | return ret; | |
8ae0d7e8 MB |
1319 | if (map->cache_only) { |
1320 | map->cache_dirty = true; | |
5d1729e7 | 1321 | return 0; |
8ae0d7e8 | 1322 | } |
5d1729e7 DP |
1323 | } |
1324 | ||
1044c180 MB |
1325 | #ifdef LOG_DEVICE |
1326 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1327 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1328 | #endif | |
1329 | ||
fb2736bb MB |
1330 | trace_regmap_reg_write(map->dev, reg, val); |
1331 | ||
d2a5884a | 1332 | return map->reg_write(context, reg, val); |
b83a313b MB |
1333 | } |
1334 | ||
1335 | /** | |
1336 | * regmap_write(): Write a value to a single register | |
1337 | * | |
1338 | * @map: Register map to write to | |
1339 | * @reg: Register to write to | |
1340 | * @val: Value to be written | |
1341 | * | |
1342 | * A value of zero will be returned on success, a negative errno will | |
1343 | * be returned in error cases. | |
1344 | */ | |
1345 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1346 | { | |
1347 | int ret; | |
1348 | ||
f01ee60f SW |
1349 | if (reg % map->reg_stride) |
1350 | return -EINVAL; | |
1351 | ||
0d4529c5 | 1352 | map->lock(map->lock_arg); |
b83a313b MB |
1353 | |
1354 | ret = _regmap_write(map, reg, val); | |
1355 | ||
0d4529c5 | 1356 | map->unlock(map->lock_arg); |
b83a313b MB |
1357 | |
1358 | return ret; | |
1359 | } | |
1360 | EXPORT_SYMBOL_GPL(regmap_write); | |
1361 | ||
915f441b MB |
1362 | /** |
1363 | * regmap_write_async(): Write a value to a single register asynchronously | |
1364 | * | |
1365 | * @map: Register map to write to | |
1366 | * @reg: Register to write to | |
1367 | * @val: Value to be written | |
1368 | * | |
1369 | * A value of zero will be returned on success, a negative errno will | |
1370 | * be returned in error cases. | |
1371 | */ | |
1372 | int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val) | |
1373 | { | |
1374 | int ret; | |
1375 | ||
1376 | if (reg % map->reg_stride) | |
1377 | return -EINVAL; | |
1378 | ||
1379 | map->lock(map->lock_arg); | |
1380 | ||
1381 | map->async = true; | |
1382 | ||
1383 | ret = _regmap_write(map, reg, val); | |
1384 | ||
1385 | map->async = false; | |
1386 | ||
1387 | map->unlock(map->lock_arg); | |
1388 | ||
1389 | return ret; | |
1390 | } | |
1391 | EXPORT_SYMBOL_GPL(regmap_write_async); | |
1392 | ||
b83a313b MB |
1393 | /** |
1394 | * regmap_raw_write(): Write raw values to one or more registers | |
1395 | * | |
1396 | * @map: Register map to write to | |
1397 | * @reg: Initial register to write to | |
1398 | * @val: Block of data to be written, laid out for direct transmission to the | |
1399 | * device | |
1400 | * @val_len: Length of data pointed to by val. | |
1401 | * | |
1402 | * This function is intended to be used for things like firmware | |
1403 | * download where a large block of data needs to be transferred to the | |
1404 | * device. No formatting will be done on the data provided. | |
1405 | * | |
1406 | * A value of zero will be returned on success, a negative errno will | |
1407 | * be returned in error cases. | |
1408 | */ | |
1409 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1410 | const void *val, size_t val_len) | |
1411 | { | |
1412 | int ret; | |
1413 | ||
221ad7f2 | 1414 | if (!regmap_can_raw_write(map)) |
d2a5884a | 1415 | return -EINVAL; |
851960ba SW |
1416 | if (val_len % map->format.val_bytes) |
1417 | return -EINVAL; | |
1418 | ||
0d4529c5 | 1419 | map->lock(map->lock_arg); |
b83a313b | 1420 | |
0a819809 | 1421 | ret = _regmap_raw_write(map, reg, val, val_len); |
b83a313b | 1422 | |
0d4529c5 | 1423 | map->unlock(map->lock_arg); |
b83a313b MB |
1424 | |
1425 | return ret; | |
1426 | } | |
1427 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1428 | ||
67252287 SK |
1429 | /** |
1430 | * regmap_field_write(): Write a value to a single register field | |
1431 | * | |
1432 | * @field: Register field to write to | |
1433 | * @val: Value to be written | |
1434 | * | |
1435 | * A value of zero will be returned on success, a negative errno will | |
1436 | * be returned in error cases. | |
1437 | */ | |
1438 | int regmap_field_write(struct regmap_field *field, unsigned int val) | |
1439 | { | |
1440 | return regmap_update_bits(field->regmap, field->reg, | |
1441 | field->mask, val << field->shift); | |
1442 | } | |
1443 | EXPORT_SYMBOL_GPL(regmap_field_write); | |
1444 | ||
fdf20029 KM |
1445 | /** |
1446 | * regmap_field_update_bits(): Perform a read/modify/write cycle | |
1447 | * on the register field | |
1448 | * | |
1449 | * @field: Register field to write to | |
1450 | * @mask: Bitmask to change | |
1451 | * @val: Value to be written | |
1452 | * | |
1453 | * A value of zero will be returned on success, a negative errno will | |
1454 | * be returned in error cases. | |
1455 | */ | |
1456 | int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val) | |
1457 | { | |
1458 | mask = (mask << field->shift) & field->mask; | |
1459 | ||
1460 | return regmap_update_bits(field->regmap, field->reg, | |
1461 | mask, val << field->shift); | |
1462 | } | |
1463 | EXPORT_SYMBOL_GPL(regmap_field_update_bits); | |
1464 | ||
a0102375 KM |
1465 | /** |
1466 | * regmap_fields_write(): Write a value to a single register field with port ID | |
1467 | * | |
1468 | * @field: Register field to write to | |
1469 | * @id: port ID | |
1470 | * @val: Value to be written | |
1471 | * | |
1472 | * A value of zero will be returned on success, a negative errno will | |
1473 | * be returned in error cases. | |
1474 | */ | |
1475 | int regmap_fields_write(struct regmap_field *field, unsigned int id, | |
1476 | unsigned int val) | |
1477 | { | |
1478 | if (id >= field->id_size) | |
1479 | return -EINVAL; | |
1480 | ||
1481 | return regmap_update_bits(field->regmap, | |
1482 | field->reg + (field->id_offset * id), | |
1483 | field->mask, val << field->shift); | |
1484 | } | |
1485 | EXPORT_SYMBOL_GPL(regmap_fields_write); | |
1486 | ||
1487 | /** | |
1488 | * regmap_fields_update_bits(): Perform a read/modify/write cycle | |
1489 | * on the register field | |
1490 | * | |
1491 | * @field: Register field to write to | |
1492 | * @id: port ID | |
1493 | * @mask: Bitmask to change | |
1494 | * @val: Value to be written | |
1495 | * | |
1496 | * A value of zero will be returned on success, a negative errno will | |
1497 | * be returned in error cases. | |
1498 | */ | |
1499 | int regmap_fields_update_bits(struct regmap_field *field, unsigned int id, | |
1500 | unsigned int mask, unsigned int val) | |
1501 | { | |
1502 | if (id >= field->id_size) | |
1503 | return -EINVAL; | |
1504 | ||
1505 | mask = (mask << field->shift) & field->mask; | |
1506 | ||
1507 | return regmap_update_bits(field->regmap, | |
1508 | field->reg + (field->id_offset * id), | |
1509 | mask, val << field->shift); | |
1510 | } | |
1511 | EXPORT_SYMBOL_GPL(regmap_fields_update_bits); | |
1512 | ||
8eaeb219 LD |
1513 | /* |
1514 | * regmap_bulk_write(): Write multiple registers to the device | |
1515 | * | |
1516 | * @map: Register map to write to | |
1517 | * @reg: First register to be write from | |
1518 | * @val: Block of data to be written, in native register size for device | |
1519 | * @val_count: Number of registers to write | |
1520 | * | |
1521 | * This function is intended to be used for writing a large block of | |
31b35e9e | 1522 | * data to the device either in single transfer or multiple transfer. |
8eaeb219 LD |
1523 | * |
1524 | * A value of zero will be returned on success, a negative errno will | |
1525 | * be returned in error cases. | |
1526 | */ | |
1527 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1528 | size_t val_count) | |
1529 | { | |
1530 | int ret = 0, i; | |
1531 | size_t val_bytes = map->format.val_bytes; | |
8eaeb219 | 1532 | |
f4298360 | 1533 | if (map->bus && !map->format.parse_inplace) |
8eaeb219 | 1534 | return -EINVAL; |
f01ee60f SW |
1535 | if (reg % map->reg_stride) |
1536 | return -EINVAL; | |
8eaeb219 | 1537 | |
0d4529c5 | 1538 | map->lock(map->lock_arg); |
f4298360 SB |
1539 | /* |
1540 | * Some devices don't support bulk write, for | |
1541 | * them we have a series of single write operations. | |
1542 | */ | |
1543 | if (!map->bus || map->use_single_rw) { | |
1544 | for (i = 0; i < val_count; i++) { | |
1545 | unsigned int ival; | |
1546 | ||
1547 | switch (val_bytes) { | |
1548 | case 1: | |
1549 | ival = *(u8 *)(val + (i * val_bytes)); | |
1550 | break; | |
1551 | case 2: | |
1552 | ival = *(u16 *)(val + (i * val_bytes)); | |
1553 | break; | |
1554 | case 4: | |
1555 | ival = *(u32 *)(val + (i * val_bytes)); | |
1556 | break; | |
1557 | #ifdef CONFIG_64BIT | |
1558 | case 8: | |
1559 | ival = *(u64 *)(val + (i * val_bytes)); | |
1560 | break; | |
1561 | #endif | |
1562 | default: | |
1563 | ret = -EINVAL; | |
1564 | goto out; | |
1565 | } | |
8eaeb219 | 1566 | |
f4298360 SB |
1567 | ret = _regmap_write(map, reg + (i * map->reg_stride), |
1568 | ival); | |
1569 | if (ret != 0) | |
1570 | goto out; | |
1571 | } | |
8eaeb219 | 1572 | } else { |
f4298360 SB |
1573 | void *wval; |
1574 | ||
8eaeb219 LD |
1575 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); |
1576 | if (!wval) { | |
1577 | ret = -ENOMEM; | |
1578 | dev_err(map->dev, "Error in memory allocation\n"); | |
1579 | goto out; | |
1580 | } | |
1581 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1582 | map->format.parse_inplace(wval + i); |
f4298360 | 1583 | |
0a819809 | 1584 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); |
8eaeb219 | 1585 | |
8eaeb219 | 1586 | kfree(wval); |
f4298360 | 1587 | } |
8eaeb219 | 1588 | out: |
0d4529c5 | 1589 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1590 | return ret; |
1591 | } | |
1592 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1593 | ||
e33fabd3 AO |
1594 | /* |
1595 | * regmap_multi_reg_write(): Write multiple registers to the device | |
1596 | * | |
1597 | * where the set of register are supplied in any order | |
1598 | * | |
1599 | * @map: Register map to write to | |
1600 | * @regs: Array of structures containing register,value to be written | |
1601 | * @num_regs: Number of registers to write | |
1602 | * | |
1603 | * This function is intended to be used for writing a large block of data | |
1604 | * atomically to the device in single transfer for those I2C client devices | |
1605 | * that implement this alternative block write mode. | |
1606 | * | |
1607 | * A value of zero will be returned on success, a negative errno will | |
1608 | * be returned in error cases. | |
1609 | */ | |
1610 | int regmap_multi_reg_write(struct regmap *map, struct reg_default *regs, | |
1611 | int num_regs) | |
1612 | { | |
1613 | int ret = 0, i; | |
1614 | ||
1615 | for (i = 0; i < num_regs; i++) { | |
1616 | int reg = regs[i].reg; | |
1617 | if (reg % map->reg_stride) | |
1618 | return -EINVAL; | |
1619 | } | |
1620 | ||
1621 | map->lock(map->lock_arg); | |
1622 | ||
1623 | for (i = 0; i < num_regs; i++) { | |
1624 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1625 | if (ret != 0) | |
1626 | goto out; | |
1627 | } | |
1628 | out: | |
1629 | map->unlock(map->lock_arg); | |
1630 | ||
1631 | return ret; | |
1632 | } | |
1633 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write); | |
1634 | ||
0d509f2b MB |
1635 | /** |
1636 | * regmap_raw_write_async(): Write raw values to one or more registers | |
1637 | * asynchronously | |
1638 | * | |
1639 | * @map: Register map to write to | |
1640 | * @reg: Initial register to write to | |
1641 | * @val: Block of data to be written, laid out for direct transmission to the | |
1642 | * device. Must be valid until regmap_async_complete() is called. | |
1643 | * @val_len: Length of data pointed to by val. | |
1644 | * | |
1645 | * This function is intended to be used for things like firmware | |
1646 | * download where a large block of data needs to be transferred to the | |
1647 | * device. No formatting will be done on the data provided. | |
1648 | * | |
1649 | * If supported by the underlying bus the write will be scheduled | |
1650 | * asynchronously, helping maximise I/O speed on higher speed buses | |
1651 | * like SPI. regmap_async_complete() can be called to ensure that all | |
1652 | * asynchrnous writes have been completed. | |
1653 | * | |
1654 | * A value of zero will be returned on success, a negative errno will | |
1655 | * be returned in error cases. | |
1656 | */ | |
1657 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, | |
1658 | const void *val, size_t val_len) | |
1659 | { | |
1660 | int ret; | |
1661 | ||
1662 | if (val_len % map->format.val_bytes) | |
1663 | return -EINVAL; | |
1664 | if (reg % map->reg_stride) | |
1665 | return -EINVAL; | |
1666 | ||
1667 | map->lock(map->lock_arg); | |
1668 | ||
0a819809 MB |
1669 | map->async = true; |
1670 | ||
1671 | ret = _regmap_raw_write(map, reg, val, val_len); | |
1672 | ||
1673 | map->async = false; | |
0d509f2b MB |
1674 | |
1675 | map->unlock(map->lock_arg); | |
1676 | ||
1677 | return ret; | |
1678 | } | |
1679 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); | |
1680 | ||
b83a313b MB |
1681 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1682 | unsigned int val_len) | |
1683 | { | |
98bc7dfd | 1684 | struct regmap_range_node *range; |
b83a313b MB |
1685 | u8 *u8 = map->work_buf; |
1686 | int ret; | |
1687 | ||
f1b5c5c3 | 1688 | WARN_ON(!map->bus); |
d2a5884a | 1689 | |
98bc7dfd MB |
1690 | range = _regmap_range_lookup(map, reg); |
1691 | if (range) { | |
1692 | ret = _regmap_select_page(map, ®, range, | |
1693 | val_len / map->format.val_bytes); | |
0ff3e62f | 1694 | if (ret != 0) |
98bc7dfd MB |
1695 | return ret; |
1696 | } | |
6863ca62 | 1697 | |
d939fb9a | 1698 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1699 | |
1700 | /* | |
6f306441 | 1701 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1702 | * register addresss; since it's always the high bits for all |
1703 | * current formats we can do this here rather than in | |
1704 | * formatting. This may break if we get interesting formats. | |
1705 | */ | |
6f306441 | 1706 | u8[0] |= map->read_flag_mask; |
b83a313b | 1707 | |
fb2736bb MB |
1708 | trace_regmap_hw_read_start(map->dev, reg, |
1709 | val_len / map->format.val_bytes); | |
1710 | ||
0135bbcc | 1711 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1712 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1713 | val, val_len); |
b83a313b | 1714 | |
fb2736bb MB |
1715 | trace_regmap_hw_read_done(map->dev, reg, |
1716 | val_len / map->format.val_bytes); | |
1717 | ||
1718 | return ret; | |
b83a313b MB |
1719 | } |
1720 | ||
ad278406 AS |
1721 | static int _regmap_bus_read(void *context, unsigned int reg, |
1722 | unsigned int *val) | |
1723 | { | |
1724 | int ret; | |
1725 | struct regmap *map = context; | |
1726 | ||
1727 | if (!map->format.parse_val) | |
1728 | return -EINVAL; | |
1729 | ||
1730 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
1731 | if (ret == 0) | |
1732 | *val = map->format.parse_val(map->work_buf); | |
1733 | ||
1734 | return ret; | |
1735 | } | |
1736 | ||
b83a313b MB |
1737 | static int _regmap_read(struct regmap *map, unsigned int reg, |
1738 | unsigned int *val) | |
1739 | { | |
1740 | int ret; | |
d2a5884a AS |
1741 | void *context = _regmap_map_get_context(map); |
1742 | ||
f1b5c5c3 | 1743 | WARN_ON(!map->reg_read); |
b83a313b | 1744 | |
5d1729e7 DP |
1745 | if (!map->cache_bypass) { |
1746 | ret = regcache_read(map, reg, val); | |
1747 | if (ret == 0) | |
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | if (map->cache_only) | |
1752 | return -EBUSY; | |
1753 | ||
d2a5884a | 1754 | ret = map->reg_read(context, reg, val); |
fb2736bb | 1755 | if (ret == 0) { |
1044c180 MB |
1756 | #ifdef LOG_DEVICE |
1757 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1758 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1759 | #endif | |
1760 | ||
fb2736bb | 1761 | trace_regmap_reg_read(map->dev, reg, *val); |
b83a313b | 1762 | |
ad278406 AS |
1763 | if (!map->cache_bypass) |
1764 | regcache_write(map, reg, *val); | |
1765 | } | |
f2985367 | 1766 | |
b83a313b MB |
1767 | return ret; |
1768 | } | |
1769 | ||
1770 | /** | |
1771 | * regmap_read(): Read a value from a single register | |
1772 | * | |
0093380c | 1773 | * @map: Register map to read from |
b83a313b MB |
1774 | * @reg: Register to be read from |
1775 | * @val: Pointer to store read value | |
1776 | * | |
1777 | * A value of zero will be returned on success, a negative errno will | |
1778 | * be returned in error cases. | |
1779 | */ | |
1780 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1781 | { | |
1782 | int ret; | |
1783 | ||
f01ee60f SW |
1784 | if (reg % map->reg_stride) |
1785 | return -EINVAL; | |
1786 | ||
0d4529c5 | 1787 | map->lock(map->lock_arg); |
b83a313b MB |
1788 | |
1789 | ret = _regmap_read(map, reg, val); | |
1790 | ||
0d4529c5 | 1791 | map->unlock(map->lock_arg); |
b83a313b MB |
1792 | |
1793 | return ret; | |
1794 | } | |
1795 | EXPORT_SYMBOL_GPL(regmap_read); | |
1796 | ||
1797 | /** | |
1798 | * regmap_raw_read(): Read raw data from the device | |
1799 | * | |
0093380c | 1800 | * @map: Register map to read from |
b83a313b MB |
1801 | * @reg: First register to be read from |
1802 | * @val: Pointer to store read value | |
1803 | * @val_len: Size of data to read | |
1804 | * | |
1805 | * A value of zero will be returned on success, a negative errno will | |
1806 | * be returned in error cases. | |
1807 | */ | |
1808 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1809 | size_t val_len) | |
1810 | { | |
b8fb5ab1 MB |
1811 | size_t val_bytes = map->format.val_bytes; |
1812 | size_t val_count = val_len / val_bytes; | |
1813 | unsigned int v; | |
1814 | int ret, i; | |
04e016ad | 1815 | |
d2a5884a AS |
1816 | if (!map->bus) |
1817 | return -EINVAL; | |
851960ba SW |
1818 | if (val_len % map->format.val_bytes) |
1819 | return -EINVAL; | |
f01ee60f SW |
1820 | if (reg % map->reg_stride) |
1821 | return -EINVAL; | |
851960ba | 1822 | |
0d4529c5 | 1823 | map->lock(map->lock_arg); |
b83a313b | 1824 | |
b8fb5ab1 MB |
1825 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1826 | map->cache_type == REGCACHE_NONE) { | |
1827 | /* Physical block read if there's no cache involved */ | |
1828 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1829 | ||
1830 | } else { | |
1831 | /* Otherwise go word by word for the cache; should be low | |
1832 | * cost as we expect to hit the cache. | |
1833 | */ | |
1834 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1835 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1836 | &v); | |
b8fb5ab1 MB |
1837 | if (ret != 0) |
1838 | goto out; | |
1839 | ||
d939fb9a | 1840 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1841 | } |
1842 | } | |
b83a313b | 1843 | |
b8fb5ab1 | 1844 | out: |
0d4529c5 | 1845 | map->unlock(map->lock_arg); |
b83a313b MB |
1846 | |
1847 | return ret; | |
1848 | } | |
1849 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1850 | ||
67252287 SK |
1851 | /** |
1852 | * regmap_field_read(): Read a value to a single register field | |
1853 | * | |
1854 | * @field: Register field to read from | |
1855 | * @val: Pointer to store read value | |
1856 | * | |
1857 | * A value of zero will be returned on success, a negative errno will | |
1858 | * be returned in error cases. | |
1859 | */ | |
1860 | int regmap_field_read(struct regmap_field *field, unsigned int *val) | |
1861 | { | |
1862 | int ret; | |
1863 | unsigned int reg_val; | |
1864 | ret = regmap_read(field->regmap, field->reg, ®_val); | |
1865 | if (ret != 0) | |
1866 | return ret; | |
1867 | ||
1868 | reg_val &= field->mask; | |
1869 | reg_val >>= field->shift; | |
1870 | *val = reg_val; | |
1871 | ||
1872 | return ret; | |
1873 | } | |
1874 | EXPORT_SYMBOL_GPL(regmap_field_read); | |
1875 | ||
a0102375 KM |
1876 | /** |
1877 | * regmap_fields_read(): Read a value to a single register field with port ID | |
1878 | * | |
1879 | * @field: Register field to read from | |
1880 | * @id: port ID | |
1881 | * @val: Pointer to store read value | |
1882 | * | |
1883 | * A value of zero will be returned on success, a negative errno will | |
1884 | * be returned in error cases. | |
1885 | */ | |
1886 | int regmap_fields_read(struct regmap_field *field, unsigned int id, | |
1887 | unsigned int *val) | |
1888 | { | |
1889 | int ret; | |
1890 | unsigned int reg_val; | |
1891 | ||
1892 | if (id >= field->id_size) | |
1893 | return -EINVAL; | |
1894 | ||
1895 | ret = regmap_read(field->regmap, | |
1896 | field->reg + (field->id_offset * id), | |
1897 | ®_val); | |
1898 | if (ret != 0) | |
1899 | return ret; | |
1900 | ||
1901 | reg_val &= field->mask; | |
1902 | reg_val >>= field->shift; | |
1903 | *val = reg_val; | |
1904 | ||
1905 | return ret; | |
1906 | } | |
1907 | EXPORT_SYMBOL_GPL(regmap_fields_read); | |
1908 | ||
b83a313b MB |
1909 | /** |
1910 | * regmap_bulk_read(): Read multiple registers from the device | |
1911 | * | |
0093380c | 1912 | * @map: Register map to read from |
b83a313b MB |
1913 | * @reg: First register to be read from |
1914 | * @val: Pointer to store read value, in native register size for device | |
1915 | * @val_count: Number of registers to read | |
1916 | * | |
1917 | * A value of zero will be returned on success, a negative errno will | |
1918 | * be returned in error cases. | |
1919 | */ | |
1920 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1921 | size_t val_count) | |
1922 | { | |
1923 | int ret, i; | |
1924 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1925 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1926 | |
f01ee60f SW |
1927 | if (reg % map->reg_stride) |
1928 | return -EINVAL; | |
b83a313b | 1929 | |
3b58ee13 | 1930 | if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) { |
2e33caf1 AJ |
1931 | /* |
1932 | * Some devices does not support bulk read, for | |
1933 | * them we have a series of single read operations. | |
1934 | */ | |
1935 | if (map->use_single_rw) { | |
1936 | for (i = 0; i < val_count; i++) { | |
1937 | ret = regmap_raw_read(map, | |
1938 | reg + (i * map->reg_stride), | |
1939 | val + (i * val_bytes), | |
1940 | val_bytes); | |
1941 | if (ret != 0) | |
1942 | return ret; | |
1943 | } | |
1944 | } else { | |
1945 | ret = regmap_raw_read(map, reg, val, | |
1946 | val_bytes * val_count); | |
1947 | if (ret != 0) | |
1948 | return ret; | |
1949 | } | |
de2d808f MB |
1950 | |
1951 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1952 | map->format.parse_inplace(val + i); |
de2d808f MB |
1953 | } else { |
1954 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1955 | unsigned int ival; |
f01ee60f | 1956 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1957 | &ival); |
de2d808f MB |
1958 | if (ret != 0) |
1959 | return ret; | |
6560ffd1 | 1960 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1961 | } |
1962 | } | |
b83a313b MB |
1963 | |
1964 | return 0; | |
1965 | } | |
1966 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1967 | ||
018690d3 MB |
1968 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1969 | unsigned int mask, unsigned int val, | |
1970 | bool *change) | |
b83a313b MB |
1971 | { |
1972 | int ret; | |
d91e8db2 | 1973 | unsigned int tmp, orig; |
b83a313b | 1974 | |
d91e8db2 | 1975 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1976 | if (ret != 0) |
fc3ebd78 | 1977 | return ret; |
b83a313b | 1978 | |
d91e8db2 | 1979 | tmp = orig & ~mask; |
b83a313b MB |
1980 | tmp |= val & mask; |
1981 | ||
018690d3 | 1982 | if (tmp != orig) { |
d91e8db2 | 1983 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1984 | *change = true; |
1985 | } else { | |
1986 | *change = false; | |
1987 | } | |
b83a313b | 1988 | |
b83a313b MB |
1989 | return ret; |
1990 | } | |
018690d3 MB |
1991 | |
1992 | /** | |
1993 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1994 | * | |
1995 | * @map: Register map to update | |
1996 | * @reg: Register to update | |
1997 | * @mask: Bitmask to change | |
1998 | * @val: New value for bitmask | |
1999 | * | |
2000 | * Returns zero for success, a negative number on error. | |
2001 | */ | |
2002 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
2003 | unsigned int mask, unsigned int val) | |
2004 | { | |
2005 | bool change; | |
fc3ebd78 KG |
2006 | int ret; |
2007 | ||
0d4529c5 | 2008 | map->lock(map->lock_arg); |
fc3ebd78 | 2009 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 2010 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
2011 | |
2012 | return ret; | |
018690d3 | 2013 | } |
b83a313b | 2014 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 2015 | |
915f441b MB |
2016 | /** |
2017 | * regmap_update_bits_async: Perform a read/modify/write cycle on the register | |
2018 | * map asynchronously | |
2019 | * | |
2020 | * @map: Register map to update | |
2021 | * @reg: Register to update | |
2022 | * @mask: Bitmask to change | |
2023 | * @val: New value for bitmask | |
2024 | * | |
2025 | * With most buses the read must be done synchronously so this is most | |
2026 | * useful for devices with a cache which do not need to interact with | |
2027 | * the hardware to determine the current register value. | |
2028 | * | |
2029 | * Returns zero for success, a negative number on error. | |
2030 | */ | |
2031 | int regmap_update_bits_async(struct regmap *map, unsigned int reg, | |
2032 | unsigned int mask, unsigned int val) | |
2033 | { | |
2034 | bool change; | |
2035 | int ret; | |
2036 | ||
2037 | map->lock(map->lock_arg); | |
2038 | ||
2039 | map->async = true; | |
2040 | ||
2041 | ret = _regmap_update_bits(map, reg, mask, val, &change); | |
2042 | ||
2043 | map->async = false; | |
2044 | ||
2045 | map->unlock(map->lock_arg); | |
2046 | ||
2047 | return ret; | |
2048 | } | |
2049 | EXPORT_SYMBOL_GPL(regmap_update_bits_async); | |
2050 | ||
018690d3 MB |
2051 | /** |
2052 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
2053 | * register map and report if updated | |
2054 | * | |
2055 | * @map: Register map to update | |
2056 | * @reg: Register to update | |
2057 | * @mask: Bitmask to change | |
2058 | * @val: New value for bitmask | |
2059 | * @change: Boolean indicating if a write was done | |
2060 | * | |
2061 | * Returns zero for success, a negative number on error. | |
2062 | */ | |
2063 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
2064 | unsigned int mask, unsigned int val, | |
2065 | bool *change) | |
2066 | { | |
fc3ebd78 KG |
2067 | int ret; |
2068 | ||
0d4529c5 | 2069 | map->lock(map->lock_arg); |
fc3ebd78 | 2070 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 2071 | map->unlock(map->lock_arg); |
fc3ebd78 | 2072 | return ret; |
018690d3 MB |
2073 | } |
2074 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
2075 | ||
915f441b MB |
2076 | /** |
2077 | * regmap_update_bits_check_async: Perform a read/modify/write cycle on the | |
2078 | * register map asynchronously and report if | |
2079 | * updated | |
2080 | * | |
2081 | * @map: Register map to update | |
2082 | * @reg: Register to update | |
2083 | * @mask: Bitmask to change | |
2084 | * @val: New value for bitmask | |
2085 | * @change: Boolean indicating if a write was done | |
2086 | * | |
2087 | * With most buses the read must be done synchronously so this is most | |
2088 | * useful for devices with a cache which do not need to interact with | |
2089 | * the hardware to determine the current register value. | |
2090 | * | |
2091 | * Returns zero for success, a negative number on error. | |
2092 | */ | |
2093 | int regmap_update_bits_check_async(struct regmap *map, unsigned int reg, | |
2094 | unsigned int mask, unsigned int val, | |
2095 | bool *change) | |
2096 | { | |
2097 | int ret; | |
2098 | ||
2099 | map->lock(map->lock_arg); | |
2100 | ||
2101 | map->async = true; | |
2102 | ||
2103 | ret = _regmap_update_bits(map, reg, mask, val, change); | |
2104 | ||
2105 | map->async = false; | |
2106 | ||
2107 | map->unlock(map->lock_arg); | |
2108 | ||
2109 | return ret; | |
2110 | } | |
2111 | EXPORT_SYMBOL_GPL(regmap_update_bits_check_async); | |
2112 | ||
0d509f2b MB |
2113 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
2114 | { | |
2115 | struct regmap *map = async->map; | |
2116 | bool wake; | |
2117 | ||
fe7d4ccd MB |
2118 | trace_regmap_async_io_complete(map->dev); |
2119 | ||
0d509f2b | 2120 | spin_lock(&map->async_lock); |
7e09a979 | 2121 | list_move(&async->list, &map->async_free); |
0d509f2b MB |
2122 | wake = list_empty(&map->async_list); |
2123 | ||
2124 | if (ret != 0) | |
2125 | map->async_ret = ret; | |
2126 | ||
2127 | spin_unlock(&map->async_lock); | |
2128 | ||
0d509f2b MB |
2129 | if (wake) |
2130 | wake_up(&map->async_waitq); | |
2131 | } | |
f804fb56 | 2132 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
0d509f2b MB |
2133 | |
2134 | static int regmap_async_is_done(struct regmap *map) | |
2135 | { | |
2136 | unsigned long flags; | |
2137 | int ret; | |
2138 | ||
2139 | spin_lock_irqsave(&map->async_lock, flags); | |
2140 | ret = list_empty(&map->async_list); | |
2141 | spin_unlock_irqrestore(&map->async_lock, flags); | |
2142 | ||
2143 | return ret; | |
2144 | } | |
2145 | ||
2146 | /** | |
2147 | * regmap_async_complete: Ensure all asynchronous I/O has completed. | |
2148 | * | |
2149 | * @map: Map to operate on. | |
2150 | * | |
2151 | * Blocks until any pending asynchronous I/O has completed. Returns | |
2152 | * an error code for any failed I/O operations. | |
2153 | */ | |
2154 | int regmap_async_complete(struct regmap *map) | |
2155 | { | |
2156 | unsigned long flags; | |
2157 | int ret; | |
2158 | ||
2159 | /* Nothing to do with no async support */ | |
f2e055e7 | 2160 | if (!map->bus || !map->bus->async_write) |
0d509f2b MB |
2161 | return 0; |
2162 | ||
fe7d4ccd MB |
2163 | trace_regmap_async_complete_start(map->dev); |
2164 | ||
0d509f2b MB |
2165 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
2166 | ||
2167 | spin_lock_irqsave(&map->async_lock, flags); | |
2168 | ret = map->async_ret; | |
2169 | map->async_ret = 0; | |
2170 | spin_unlock_irqrestore(&map->async_lock, flags); | |
2171 | ||
fe7d4ccd MB |
2172 | trace_regmap_async_complete_done(map->dev); |
2173 | ||
0d509f2b MB |
2174 | return ret; |
2175 | } | |
f88948ef | 2176 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
0d509f2b | 2177 | |
22f0d90a MB |
2178 | /** |
2179 | * regmap_register_patch: Register and apply register updates to be applied | |
2180 | * on device initialistion | |
2181 | * | |
2182 | * @map: Register map to apply updates to. | |
2183 | * @regs: Values to update. | |
2184 | * @num_regs: Number of entries in regs. | |
2185 | * | |
2186 | * Register a set of register updates to be applied to the device | |
2187 | * whenever the device registers are synchronised with the cache and | |
2188 | * apply them immediately. Typically this is used to apply | |
2189 | * corrections to be applied to the device defaults on startup, such | |
2190 | * as the updates some vendors provide to undocumented registers. | |
2191 | */ | |
2192 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
2193 | int num_regs) | |
2194 | { | |
aab13ebc | 2195 | struct reg_default *p; |
22f0d90a MB |
2196 | int i, ret; |
2197 | bool bypass; | |
2198 | ||
bd60e381 CZ |
2199 | if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n", |
2200 | num_regs)) | |
2201 | return 0; | |
2202 | ||
0d4529c5 | 2203 | map->lock(map->lock_arg); |
22f0d90a MB |
2204 | |
2205 | bypass = map->cache_bypass; | |
2206 | ||
2207 | map->cache_bypass = true; | |
1a25f261 | 2208 | map->async = true; |
22f0d90a MB |
2209 | |
2210 | /* Write out first; it's useful to apply even if we fail later. */ | |
2211 | for (i = 0; i < num_regs; i++) { | |
2212 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
2213 | if (ret != 0) { | |
2214 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
2215 | regs[i].reg, regs[i].def, ret); | |
2216 | goto out; | |
2217 | } | |
2218 | } | |
2219 | ||
aab13ebc MB |
2220 | p = krealloc(map->patch, |
2221 | sizeof(struct reg_default) * (map->patch_regs + num_regs), | |
2222 | GFP_KERNEL); | |
2223 | if (p) { | |
2224 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); | |
2225 | map->patch = p; | |
2226 | map->patch_regs += num_regs; | |
22f0d90a MB |
2227 | } else { |
2228 | ret = -ENOMEM; | |
2229 | } | |
2230 | ||
2231 | out: | |
1a25f261 | 2232 | map->async = false; |
22f0d90a MB |
2233 | map->cache_bypass = bypass; |
2234 | ||
0d4529c5 | 2235 | map->unlock(map->lock_arg); |
22f0d90a | 2236 | |
1a25f261 MB |
2237 | regmap_async_complete(map); |
2238 | ||
22f0d90a MB |
2239 | return ret; |
2240 | } | |
2241 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
2242 | ||
eae4b51b | 2243 | /* |
a6539c32 MB |
2244 | * regmap_get_val_bytes(): Report the size of a register value |
2245 | * | |
2246 | * Report the size of a register value, mainly intended to for use by | |
2247 | * generic infrastructure built on top of regmap. | |
2248 | */ | |
2249 | int regmap_get_val_bytes(struct regmap *map) | |
2250 | { | |
2251 | if (map->format.format_write) | |
2252 | return -EINVAL; | |
2253 | ||
2254 | return map->format.val_bytes; | |
2255 | } | |
2256 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
2257 | ||
31244e39 MB |
2258 | static int __init regmap_initcall(void) |
2259 | { | |
2260 | regmap_debugfs_initcall(); | |
2261 | ||
2262 | return 0; | |
2263 | } | |
2264 | postcore_initcall(regmap_initcall); |