24 static int regcache_hw_init(struct regmap *map)  in regcache_hw_init()  argument
32 	if (!map->num_reg_defaults_raw)  in regcache_hw_init()
36 	for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++)  in regcache_hw_init()
37 		if (regmap_readable(map, i * map->reg_stride) &&  in regcache_hw_init()
38 		    !regmap_volatile(map, i * map->reg_stride))  in regcache_hw_init()
43 		map->cache_bypass = true;  in regcache_hw_init()
47 	map->num_reg_defaults = count;  in regcache_hw_init()
48 	map->reg_defaults = kmalloc_array(count, sizeof(struct reg_default),  in regcache_hw_init()
50 	if (!map->reg_defaults)  in regcache_hw_init()
53 	if (!map->reg_defaults_raw) {  in regcache_hw_init()
54 		bool cache_bypass = map->cache_bypass;  in regcache_hw_init()
55 		dev_warn(map->dev, "No cache defaults, reading back from HW\n");  in regcache_hw_init()
58 		map->cache_bypass = true;  in regcache_hw_init()
59 		tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);  in regcache_hw_init()
64 		ret = regmap_raw_read(map, 0, tmp_buf,  in regcache_hw_init()
65 				      map->cache_size_raw);  in regcache_hw_init()
66 		map->cache_bypass = cache_bypass;  in regcache_hw_init()
68 			map->reg_defaults_raw = tmp_buf;  in regcache_hw_init()
69 			map->cache_free = true;  in regcache_hw_init()
76 	for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) {  in regcache_hw_init()
77 		reg = i * map->reg_stride;  in regcache_hw_init()
79 		if (!regmap_readable(map, reg))  in regcache_hw_init()
82 		if (regmap_volatile(map, reg))  in regcache_hw_init()
85 		if (map->reg_defaults_raw) {  in regcache_hw_init()
86 			val = regcache_get_val(map, map->reg_defaults_raw, i);  in regcache_hw_init()
88 			bool cache_bypass = map->cache_bypass;  in regcache_hw_init()
90 			map->cache_bypass = true;  in regcache_hw_init()
91 			ret = regmap_read(map, reg, &val);  in regcache_hw_init()
92 			map->cache_bypass = cache_bypass;  in regcache_hw_init()
94 				dev_err(map->dev, "Failed to read %d: %d\n",  in regcache_hw_init()
100 		map->reg_defaults[j].reg = reg;  in regcache_hw_init()
101 		map->reg_defaults[j].def = val;  in regcache_hw_init()
108 	kfree(map->reg_defaults);  in regcache_hw_init()
113 int regcache_init(struct regmap *map, const struct regmap_config *config)  in regcache_init()  argument
119 	if (map->cache_type == REGCACHE_NONE) {  in regcache_init()
121 			dev_warn(map->dev,  in regcache_init()
124 		map->cache_bypass = true;  in regcache_init()
129 		dev_err(map->dev,  in regcache_init()
135 		dev_err(map->dev,  in regcache_init()
141 		if (config->reg_defaults[i].reg % map->reg_stride)  in regcache_init()
145 		if (cache_types[i]->type == map->cache_type)  in regcache_init()
149 		dev_err(map->dev, "Could not match cache type: %d\n",  in regcache_init()
150 			map->cache_type);  in regcache_init()
154 	map->num_reg_defaults = config->num_reg_defaults;  in regcache_init()
155 	map->num_reg_defaults_raw = config->num_reg_defaults_raw;  in regcache_init()
156 	map->reg_defaults_raw = config->reg_defaults_raw;  in regcache_init()
157 	map->cache_word_size = DIV_ROUND_UP(config->val_bits, 8);  in regcache_init()
158 	map->cache_size_raw = map->cache_word_size * config->num_reg_defaults_raw;  in regcache_init()
160 	map->cache = NULL;  in regcache_init()
161 	map->cache_ops = cache_types[i];  in regcache_init()
163 	if (!map->cache_ops->read ||  in regcache_init()
164 	    !map->cache_ops->write ||  in regcache_init()
165 	    !map->cache_ops->name)  in regcache_init()
173 		tmp_buf = kmemdup(config->reg_defaults, map->num_reg_defaults *  in regcache_init()
177 		map->reg_defaults = tmp_buf;  in regcache_init()
178 	} else if (map->num_reg_defaults_raw) {  in regcache_init()
183 		ret = regcache_hw_init(map);  in regcache_init()
186 		if (map->cache_bypass)  in regcache_init()
190 	if (!map->max_register && map->num_reg_defaults_raw)  in regcache_init()
191 		map->max_register = (map->num_reg_defaults_raw  - 1) * map->reg_stride;  in regcache_init()
193 	if (map->cache_ops->init) {  in regcache_init()
194 		dev_dbg(map->dev, "Initializing %s cache\n",  in regcache_init()
195 			map->cache_ops->name);  in regcache_init()
196 		ret = map->cache_ops->init(map);  in regcache_init()
203 	kfree(map->reg_defaults);  in regcache_init()
204 	if (map->cache_free)  in regcache_init()
205 		kfree(map->reg_defaults_raw);  in regcache_init()
210 void regcache_exit(struct regmap *map)  in regcache_exit()  argument
212 	if (map->cache_type == REGCACHE_NONE)  in regcache_exit()
215 	BUG_ON(!map->cache_ops);  in regcache_exit()
217 	kfree(map->reg_defaults);  in regcache_exit()
218 	if (map->cache_free)  in regcache_exit()
219 		kfree(map->reg_defaults_raw);  in regcache_exit()
221 	if (map->cache_ops->exit) {  in regcache_exit()
222 		dev_dbg(map->dev, "Destroying %s cache\n",  in regcache_exit()
223 			map->cache_ops->name);  in regcache_exit()
224 		map->cache_ops->exit(map);  in regcache_exit()
231  * @map: map to configure.
237 int regcache_read(struct regmap *map,  in regcache_read()  argument
242 	if (map->cache_type == REGCACHE_NONE)  in regcache_read()
245 	BUG_ON(!map->cache_ops);  in regcache_read()
247 	if (!regmap_volatile(map, reg)) {  in regcache_read()
248 		ret = map->cache_ops->read(map, reg, value);  in regcache_read()
251 			trace_regmap_reg_read_cache(map, reg, *value);  in regcache_read()
262  * @map: map to configure.
268 int regcache_write(struct regmap *map,  in regcache_write()  argument
271 	if (map->cache_type == REGCACHE_NONE)  in regcache_write()
274 	BUG_ON(!map->cache_ops);  in regcache_write()
276 	if (!regmap_volatile(map, reg))  in regcache_write()
277 		return map->cache_ops->write(map, reg, value);  in regcache_write()
282 bool regcache_reg_needs_sync(struct regmap *map, unsigned int reg,  in regcache_reg_needs_sync()  argument
287 	if (!regmap_writeable(map, reg))  in regcache_reg_needs_sync()
291 	if (!map->no_sync_defaults)  in regcache_reg_needs_sync()
295 	ret = regcache_lookup_reg(map, reg);  in regcache_reg_needs_sync()
296 	if (ret >= 0 && val == map->reg_defaults[ret].def)  in regcache_reg_needs_sync()
301 static int regcache_default_sync(struct regmap *map, unsigned int min,  in regcache_default_sync()  argument
306 	for (reg = min; reg <= max; reg += map->reg_stride) {  in regcache_default_sync()
310 		if (regmap_volatile(map, reg) ||  in regcache_default_sync()
311 		    !regmap_writeable(map, reg))  in regcache_default_sync()
314 		ret = regcache_read(map, reg, &val);  in regcache_default_sync()
320 		if (!regcache_reg_needs_sync(map, reg, val))  in regcache_default_sync()
323 		map->cache_bypass = true;  in regcache_default_sync()
324 		ret = _regmap_write(map, reg, val);  in regcache_default_sync()
325 		map->cache_bypass = false;  in regcache_default_sync()
327 			dev_err(map->dev, "Unable to sync register %#x. %d\n",  in regcache_default_sync()
331 		dev_dbg(map->dev, "Synced register %#x, value %#x\n", reg, val);  in regcache_default_sync()
340  * @map: map to configure.
348 int regcache_sync(struct regmap *map)  in regcache_sync()  argument
355 	if (WARN_ON(map->cache_type == REGCACHE_NONE))  in regcache_sync()
358 	BUG_ON(!map->cache_ops);  in regcache_sync()
360 	map->lock(map->lock_arg);  in regcache_sync()
362 	bypass = map->cache_bypass;  in regcache_sync()
363 	dev_dbg(map->dev, "Syncing %s cache\n",  in regcache_sync()
364 		map->cache_ops->name);  in regcache_sync()
365 	name = map->cache_ops->name;  in regcache_sync()
366 	trace_regcache_sync(map, name, "start");  in regcache_sync()
368 	if (!map->cache_dirty)  in regcache_sync()
372 	map->cache_bypass = true;  in regcache_sync()
373 	for (i = 0; i < map->patch_regs; i++) {  in regcache_sync()
374 		ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);  in regcache_sync()
376 			dev_err(map->dev, "Failed to write %x = %x: %d\n",  in regcache_sync()
377 				map->patch[i].reg, map->patch[i].def, ret);  in regcache_sync()
381 	map->cache_bypass = false;  in regcache_sync()
383 	if (map->cache_ops->sync)  in regcache_sync()
384 		ret = map->cache_ops->sync(map, 0, map->max_register);  in regcache_sync()
386 		ret = regcache_default_sync(map, 0, map->max_register);  in regcache_sync()
389 		map->cache_dirty = false;  in regcache_sync()
393 	map->cache_bypass = bypass;  in regcache_sync()
394 	map->no_sync_defaults = false;  in regcache_sync()
395 	map->unlock(map->lock_arg);  in regcache_sync()
397 	regmap_async_complete(map);  in regcache_sync()
399 	trace_regcache_sync(map, name, "stop");  in regcache_sync()
408  * @map: map to sync.
417 int regcache_sync_region(struct regmap *map, unsigned int min,  in regcache_sync_region()  argument
424 	if (WARN_ON(map->cache_type == REGCACHE_NONE))  in regcache_sync_region()
427 	BUG_ON(!map->cache_ops);  in regcache_sync_region()
429 	map->lock(map->lock_arg);  in regcache_sync_region()
432 	bypass = map->cache_bypass;  in regcache_sync_region()
434 	name = map->cache_ops->name;  in regcache_sync_region()
435 	dev_dbg(map->dev, "Syncing %s cache from %d-%d\n", name, min, max);  in regcache_sync_region()
437 	trace_regcache_sync(map, name, "start region");  in regcache_sync_region()
439 	if (!map->cache_dirty)  in regcache_sync_region()
442 	map->async = true;  in regcache_sync_region()
444 	if (map->cache_ops->sync)  in regcache_sync_region()
445 		ret = map->cache_ops->sync(map, min, max);  in regcache_sync_region()
447 		ret = regcache_default_sync(map, min, max);  in regcache_sync_region()
451 	map->cache_bypass = bypass;  in regcache_sync_region()
452 	map->async = false;  in regcache_sync_region()
453 	map->no_sync_defaults = false;  in regcache_sync_region()
454 	map->unlock(map->lock_arg);  in regcache_sync_region()
456 	regmap_async_complete(map);  in regcache_sync_region()
458 	trace_regcache_sync(map, name, "stop region");  in regcache_sync_region()
467  * @map: map to operate on
475 int regcache_drop_region(struct regmap *map, unsigned int min,  in regcache_drop_region()  argument
480 	if (!map->cache_ops || !map->cache_ops->drop)  in regcache_drop_region()
483 	map->lock(map->lock_arg);  in regcache_drop_region()
485 	trace_regcache_drop_region(map, min, max);  in regcache_drop_region()
487 	ret = map->cache_ops->drop(map, min, max);  in regcache_drop_region()
489 	map->unlock(map->lock_arg);  in regcache_drop_region()
496  * regcache_cache_only - Put a register map into cache only mode
498  * @map: map to configure
501  * When a register map is marked as cache only writes to the register
502  * map API will only update the register cache, they will not cause
507 void regcache_cache_only(struct regmap *map, bool enable)  in regcache_cache_only()  argument
509 	map->lock(map->lock_arg);  in regcache_cache_only()
510 	WARN_ON(map->cache_type != REGCACHE_NONE &&  in regcache_cache_only()
511 		map->cache_bypass && enable);  in regcache_cache_only()
512 	map->cache_only = enable;  in regcache_cache_only()
513 	trace_regmap_cache_only(map, enable);  in regcache_cache_only()
514 	map->unlock(map->lock_arg);  in regcache_cache_only()
521  * @map: map to mark
531 void regcache_mark_dirty(struct regmap *map)  in regcache_mark_dirty()  argument
533 	map->lock(map->lock_arg);  in regcache_mark_dirty()
534 	map->cache_dirty = true;  in regcache_mark_dirty()
535 	map->no_sync_defaults = true;  in regcache_mark_dirty()
536 	map->unlock(map->lock_arg);  in regcache_mark_dirty()
541  * regcache_cache_bypass - Put a register map into cache bypass mode
543  * @map: map to configure
546  * When a register map is marked with the cache bypass option, writes
547  * to the register map API will only update the hardware and not
551 void regcache_cache_bypass(struct regmap *map, bool enable)  in regcache_cache_bypass()  argument
553 	map->lock(map->lock_arg);  in regcache_cache_bypass()
554 	WARN_ON(map->cache_only && enable);  in regcache_cache_bypass()
555 	map->cache_bypass = enable;  in regcache_cache_bypass()
556 	trace_regmap_cache_bypass(map, enable);  in regcache_cache_bypass()
557 	map->unlock(map->lock_arg);  in regcache_cache_bypass()
564  * @map: map to check
569 bool regcache_reg_cached(struct regmap *map, unsigned int reg)  in regcache_reg_cached()  argument
574 	map->lock(map->lock_arg);  in regcache_reg_cached()
576 	ret = regcache_read(map, reg, &val);  in regcache_reg_cached()
578 	map->unlock(map->lock_arg);  in regcache_reg_cached()
584 void regcache_set_val(struct regmap *map, void *base, unsigned int idx,  in regcache_set_val()  argument
588 	if (map->format.format_val) {  in regcache_set_val()
589 		map->format.format_val(base + (map->cache_word_size * idx),  in regcache_set_val()
594 	switch (map->cache_word_size) {  in regcache_set_val()
618 unsigned int regcache_get_val(struct regmap *map, const void *base,  in regcache_get_val()  argument
625 	if (map->format.parse_val)  in regcache_get_val()
626 		return map->format.parse_val(regcache_get_val_addr(map, base,  in regcache_get_val()
629 	switch (map->cache_word_size) {  in regcache_get_val()
660 int regcache_lookup_reg(struct regmap *map, unsigned int reg)  in regcache_lookup_reg()  argument
668 	r = bsearch(&key, map->reg_defaults, map->num_reg_defaults,  in regcache_lookup_reg()
672 		return r - map->reg_defaults;  in regcache_lookup_reg()
685 int regcache_sync_val(struct regmap *map, unsigned int reg, unsigned int val)  in regcache_sync_val()  argument
689 	if (!regcache_reg_needs_sync(map, reg, val))  in regcache_sync_val()
692 	map->cache_bypass = true;  in regcache_sync_val()
694 	ret = _regmap_write(map, reg, val);  in regcache_sync_val()
696 	map->cache_bypass = false;  in regcache_sync_val()
699 		dev_err(map->dev, "Unable to sync register %#x. %d\n",  in regcache_sync_val()
703 	dev_dbg(map->dev, "Synced register %#x, value %#x\n",  in regcache_sync_val()
709 static int regcache_sync_block_single(struct regmap *map, void *block,  in regcache_sync_block_single()  argument
718 		regtmp = block_base + (i * map->reg_stride);  in regcache_sync_block_single()
721 		    !regmap_writeable(map, regtmp))  in regcache_sync_block_single()
724 		val = regcache_get_val(map, block, i);  in regcache_sync_block_single()
725 		ret = regcache_sync_val(map, regtmp, val);  in regcache_sync_block_single()
733 static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,  in regcache_sync_block_raw_flush()  argument
736 	size_t val_bytes = map->format.val_bytes;  in regcache_sync_block_raw_flush()
742 	count = (cur - base) / map->reg_stride;  in regcache_sync_block_raw_flush()
744 	dev_dbg(map->dev, "Writing %zu bytes for %d registers from 0x%x-0x%x\n",  in regcache_sync_block_raw_flush()
745 		count * val_bytes, count, base, cur - map->reg_stride);  in regcache_sync_block_raw_flush()
747 	map->cache_bypass = true;  in regcache_sync_block_raw_flush()
749 	ret = _regmap_raw_write(map, base, *data, count * val_bytes, false);  in regcache_sync_block_raw_flush()
751 		dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",  in regcache_sync_block_raw_flush()
752 			base, cur - map->reg_stride, ret);  in regcache_sync_block_raw_flush()
754 	map->cache_bypass = false;  in regcache_sync_block_raw_flush()
761 static int regcache_sync_block_raw(struct regmap *map, void *block,  in regcache_sync_block_raw()  argument
773 		regtmp = block_base + (i * map->reg_stride);  in regcache_sync_block_raw()
776 		    !regmap_writeable(map, regtmp)) {  in regcache_sync_block_raw()
777 			ret = regcache_sync_block_raw_flush(map, &data,  in regcache_sync_block_raw()
784 		val = regcache_get_val(map, block, i);  in regcache_sync_block_raw()
785 		if (!regcache_reg_needs_sync(map, regtmp, val)) {  in regcache_sync_block_raw()
786 			ret = regcache_sync_block_raw_flush(map, &data,  in regcache_sync_block_raw()
794 			data = regcache_get_val_addr(map, block, i);  in regcache_sync_block_raw()
799 	return regcache_sync_block_raw_flush(map, &data, base, regtmp +  in regcache_sync_block_raw()
800 			map->reg_stride);  in regcache_sync_block_raw()
803 int regcache_sync_block(struct regmap *map, void *block,  in regcache_sync_block()  argument
808 	if (regmap_can_raw_write(map) && !map->use_single_write)  in regcache_sync_block()
809 		return regcache_sync_block_raw(map, block, cache_present,  in regcache_sync_block()
812 		return regcache_sync_block_single(map, block, cache_present,  in regcache_sync_block()