26 static int regcache_hw_init(struct regmap *map)  in regcache_hw_init()  argument
34 	if (!map->num_reg_defaults_raw)  in regcache_hw_init()
38 	for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++)  in regcache_hw_init()
39 		if (regmap_readable(map, i * map->reg_stride) &&  in regcache_hw_init()
40 		    !regmap_volatile(map, i * map->reg_stride))  in regcache_hw_init()
45 		map->cache_bypass = true;  in regcache_hw_init()
49 	map->num_reg_defaults = count;  in regcache_hw_init()
50 	map->reg_defaults = kmalloc_array(count, sizeof(struct reg_default),  in regcache_hw_init()
52 	if (!map->reg_defaults)  in regcache_hw_init()
55 	if (!map->reg_defaults_raw) {  in regcache_hw_init()
56 		bool cache_bypass = map->cache_bypass;  in regcache_hw_init()
57 		dev_warn(map->dev, "No cache defaults, reading back from HW\n");  in regcache_hw_init()
60 		map->cache_bypass = true;  in regcache_hw_init()
61 		tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);  in regcache_hw_init()
66 		ret = regmap_raw_read(map, 0, tmp_buf,  in regcache_hw_init()
67 				      map->cache_size_raw);  in regcache_hw_init()
68 		map->cache_bypass = cache_bypass;  in regcache_hw_init()
70 			map->reg_defaults_raw = tmp_buf;  in regcache_hw_init()
71 			map->cache_free = true;  in regcache_hw_init()
78 	for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) {  in regcache_hw_init()
79 		reg = i * map->reg_stride;  in regcache_hw_init()
81 		if (!regmap_readable(map, reg))  in regcache_hw_init()
84 		if (regmap_volatile(map, reg))  in regcache_hw_init()
87 		if (map->reg_defaults_raw) {  in regcache_hw_init()
88 			val = regcache_get_val(map, map->reg_defaults_raw, i);  in regcache_hw_init()
90 			bool cache_bypass = map->cache_bypass;  in regcache_hw_init()
92 			map->cache_bypass = true;  in regcache_hw_init()
93 			ret = regmap_read(map, reg, &val);  in regcache_hw_init()
94 			map->cache_bypass = cache_bypass;  in regcache_hw_init()
96 				dev_err(map->dev, "Failed to read %d: %d\n",  in regcache_hw_init()
102 		map->reg_defaults[j].reg = reg;  in regcache_hw_init()
103 		map->reg_defaults[j].def = val;  in regcache_hw_init()
110 	kfree(map->reg_defaults);  in regcache_hw_init()
115 int regcache_init(struct regmap *map, const struct regmap_config *config)  in regcache_init()  argument
121 	if (map->cache_type == REGCACHE_NONE) {  in regcache_init()
123 			dev_warn(map->dev,  in regcache_init()
126 		map->cache_bypass = true;  in regcache_init()
131 		dev_err(map->dev,  in regcache_init()
137 		dev_err(map->dev,  in regcache_init()
143 		if (config->reg_defaults[i].reg % map->reg_stride)  in regcache_init()
147 		if (cache_types[i]->type == map->cache_type)  in regcache_init()
151 		dev_err(map->dev, "Could not match compress type: %d\n",  in regcache_init()
152 			map->cache_type);  in regcache_init()
156 	map->num_reg_defaults = config->num_reg_defaults;  in regcache_init()
157 	map->num_reg_defaults_raw = config->num_reg_defaults_raw;  in regcache_init()
158 	map->reg_defaults_raw = config->reg_defaults_raw;  in regcache_init()
159 	map->cache_word_size = DIV_ROUND_UP(config->val_bits, 8);  in regcache_init()
160 	map->cache_size_raw = map->cache_word_size * config->num_reg_defaults_raw;  in regcache_init()
162 	map->cache = NULL;  in regcache_init()
163 	map->cache_ops = cache_types[i];  in regcache_init()
165 	if (!map->cache_ops->read ||  in regcache_init()
166 	    !map->cache_ops->write ||  in regcache_init()
167 	    !map->cache_ops->name)  in regcache_init()
175 		tmp_buf = kmemdup(config->reg_defaults, map->num_reg_defaults *  in regcache_init()
179 		map->reg_defaults = tmp_buf;  in regcache_init()
180 	} else if (map->num_reg_defaults_raw) {  in regcache_init()
185 		ret = regcache_hw_init(map);  in regcache_init()
188 		if (map->cache_bypass)  in regcache_init()
192 	if (!map->max_register && map->num_reg_defaults_raw)  in regcache_init()
193 		map->max_register = (map->num_reg_defaults_raw  - 1) * map->reg_stride;  in regcache_init()
195 	if (map->cache_ops->init) {  in regcache_init()
196 		dev_dbg(map->dev, "Initializing %s cache\n",  in regcache_init()
197 			map->cache_ops->name);  in regcache_init()
198 		ret = map->cache_ops->init(map);  in regcache_init()
205 	kfree(map->reg_defaults);  in regcache_init()
206 	if (map->cache_free)  in regcache_init()
207 		kfree(map->reg_defaults_raw);  in regcache_init()
212 void regcache_exit(struct regmap *map)  in regcache_exit()  argument
214 	if (map->cache_type == REGCACHE_NONE)  in regcache_exit()
217 	BUG_ON(!map->cache_ops);  in regcache_exit()
219 	kfree(map->reg_defaults);  in regcache_exit()
220 	if (map->cache_free)  in regcache_exit()
221 		kfree(map->reg_defaults_raw);  in regcache_exit()
223 	if (map->cache_ops->exit) {  in regcache_exit()
224 		dev_dbg(map->dev, "Destroying %s cache\n",  in regcache_exit()
225 			map->cache_ops->name);  in regcache_exit()
226 		map->cache_ops->exit(map);  in regcache_exit()
233  * @map: map to configure.
239 int regcache_read(struct regmap *map,  in regcache_read()  argument
244 	if (map->cache_type == REGCACHE_NONE)  in regcache_read()
247 	BUG_ON(!map->cache_ops);  in regcache_read()
249 	if (!regmap_volatile(map, reg)) {  in regcache_read()
250 		ret = map->cache_ops->read(map, reg, value);  in regcache_read()
253 			trace_regmap_reg_read_cache(map, reg, *value);  in regcache_read()
264  * @map: map to configure.
270 int regcache_write(struct regmap *map,  in regcache_write()  argument
273 	if (map->cache_type == REGCACHE_NONE)  in regcache_write()
276 	BUG_ON(!map->cache_ops);  in regcache_write()
278 	if (!regmap_volatile(map, reg))  in regcache_write()
279 		return map->cache_ops->write(map, reg, value);  in regcache_write()
284 static bool regcache_reg_needs_sync(struct regmap *map, unsigned int reg,  in regcache_reg_needs_sync()  argument
290 	if (!map->no_sync_defaults)  in regcache_reg_needs_sync()
294 	ret = regcache_lookup_reg(map, reg);  in regcache_reg_needs_sync()
295 	if (ret >= 0 && val == map->reg_defaults[ret].def)  in regcache_reg_needs_sync()
300 static int regcache_default_sync(struct regmap *map, unsigned int min,  in regcache_default_sync()  argument
305 	for (reg = min; reg <= max; reg += map->reg_stride) {  in regcache_default_sync()
309 		if (regmap_volatile(map, reg) ||  in regcache_default_sync()
310 		    !regmap_writeable(map, reg))  in regcache_default_sync()
313 		ret = regcache_read(map, reg, &val);  in regcache_default_sync()
317 		if (!regcache_reg_needs_sync(map, reg, val))  in regcache_default_sync()
320 		map->cache_bypass = true;  in regcache_default_sync()
321 		ret = _regmap_write(map, reg, val);  in regcache_default_sync()
322 		map->cache_bypass = false;  in regcache_default_sync()
324 			dev_err(map->dev, "Unable to sync register %#x. %d\n",  in regcache_default_sync()
328 		dev_dbg(map->dev, "Synced register %#x, value %#x\n", reg, val);  in regcache_default_sync()
337  * @map: map to configure.
345 int regcache_sync(struct regmap *map)  in regcache_sync()  argument
352 	BUG_ON(!map->cache_ops);  in regcache_sync()
354 	map->lock(map->lock_arg);  in regcache_sync()
356 	bypass = map->cache_bypass;  in regcache_sync()
357 	dev_dbg(map->dev, "Syncing %s cache\n",  in regcache_sync()
358 		map->cache_ops->name);  in regcache_sync()
359 	name = map->cache_ops->name;  in regcache_sync()
360 	trace_regcache_sync(map, name, "start");  in regcache_sync()
362 	if (!map->cache_dirty)  in regcache_sync()
365 	map->async = true;  in regcache_sync()
368 	map->cache_bypass = true;  in regcache_sync()
369 	for (i = 0; i < map->patch_regs; i++) {  in regcache_sync()
370 		ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);  in regcache_sync()
372 			dev_err(map->dev, "Failed to write %x = %x: %d\n",  in regcache_sync()
373 				map->patch[i].reg, map->patch[i].def, ret);  in regcache_sync()
377 	map->cache_bypass = false;  in regcache_sync()
379 	if (map->cache_ops->sync)  in regcache_sync()
380 		ret = map->cache_ops->sync(map, 0, map->max_register);  in regcache_sync()
382 		ret = regcache_default_sync(map, 0, map->max_register);  in regcache_sync()
385 		map->cache_dirty = false;  in regcache_sync()
389 	map->async = false;  in regcache_sync()
390 	map->cache_bypass = bypass;  in regcache_sync()
391 	map->no_sync_defaults = false;  in regcache_sync()
392 	map->unlock(map->lock_arg);  in regcache_sync()
394 	regmap_async_complete(map);  in regcache_sync()
396 	trace_regcache_sync(map, name, "stop");  in regcache_sync()
405  * @map: map to sync.
414 int regcache_sync_region(struct regmap *map, unsigned int min,  in regcache_sync_region()  argument
421 	BUG_ON(!map->cache_ops);  in regcache_sync_region()
423 	map->lock(map->lock_arg);  in regcache_sync_region()
426 	bypass = map->cache_bypass;  in regcache_sync_region()
428 	name = map->cache_ops->name;  in regcache_sync_region()
429 	dev_dbg(map->dev, "Syncing %s cache from %d-%d\n", name, min, max);  in regcache_sync_region()
431 	trace_regcache_sync(map, name, "start region");  in regcache_sync_region()
433 	if (!map->cache_dirty)  in regcache_sync_region()
436 	map->async = true;  in regcache_sync_region()
438 	if (map->cache_ops->sync)  in regcache_sync_region()
439 		ret = map->cache_ops->sync(map, min, max);  in regcache_sync_region()
441 		ret = regcache_default_sync(map, min, max);  in regcache_sync_region()
445 	map->cache_bypass = bypass;  in regcache_sync_region()
446 	map->async = false;  in regcache_sync_region()
447 	map->no_sync_defaults = false;  in regcache_sync_region()
448 	map->unlock(map->lock_arg);  in regcache_sync_region()
450 	regmap_async_complete(map);  in regcache_sync_region()
452 	trace_regcache_sync(map, name, "stop region");  in regcache_sync_region()
461  * @map: map to operate on
469 int regcache_drop_region(struct regmap *map, unsigned int min,  in regcache_drop_region()  argument
474 	if (!map->cache_ops || !map->cache_ops->drop)  in regcache_drop_region()
477 	map->lock(map->lock_arg);  in regcache_drop_region()
479 	trace_regcache_drop_region(map, min, max);  in regcache_drop_region()
481 	ret = map->cache_ops->drop(map, min, max);  in regcache_drop_region()
483 	map->unlock(map->lock_arg);  in regcache_drop_region()
490  * regcache_cache_only - Put a register map into cache only mode
492  * @map: map to configure
495  * When a register map is marked as cache only writes to the register
496  * map API will only update the register cache, they will not cause
501 void regcache_cache_only(struct regmap *map, bool enable)  in regcache_cache_only()  argument
503 	map->lock(map->lock_arg);  in regcache_cache_only()
504 	WARN_ON(map->cache_type != REGCACHE_NONE &&  in regcache_cache_only()
505 		map->cache_bypass && enable);  in regcache_cache_only()
506 	map->cache_only = enable;  in regcache_cache_only()
507 	trace_regmap_cache_only(map, enable);  in regcache_cache_only()
508 	map->unlock(map->lock_arg);  in regcache_cache_only()
515  * @map: map to mark
525 void regcache_mark_dirty(struct regmap *map)  in regcache_mark_dirty()  argument
527 	map->lock(map->lock_arg);  in regcache_mark_dirty()
528 	map->cache_dirty = true;  in regcache_mark_dirty()
529 	map->no_sync_defaults = true;  in regcache_mark_dirty()
530 	map->unlock(map->lock_arg);  in regcache_mark_dirty()
535  * regcache_cache_bypass - Put a register map into cache bypass mode
537  * @map: map to configure
540  * When a register map is marked with the cache bypass option, writes
541  * to the register map API will only update the hardware and not
545 void regcache_cache_bypass(struct regmap *map, bool enable)  in regcache_cache_bypass()  argument
547 	map->lock(map->lock_arg);  in regcache_cache_bypass()
548 	WARN_ON(map->cache_only && enable);  in regcache_cache_bypass()
549 	map->cache_bypass = enable;  in regcache_cache_bypass()
550 	trace_regmap_cache_bypass(map, enable);  in regcache_cache_bypass()
551 	map->unlock(map->lock_arg);  in regcache_cache_bypass()
555 bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,  in regcache_set_val()  argument
558 	if (regcache_get_val(map, base, idx) == val)  in regcache_set_val()
562 	if (map->format.format_val) {  in regcache_set_val()
563 		map->format.format_val(base + (map->cache_word_size * idx),  in regcache_set_val()
568 	switch (map->cache_word_size) {  in regcache_set_val()
601 unsigned int regcache_get_val(struct regmap *map, const void *base,  in regcache_get_val()  argument
608 	if (map->format.parse_val)  in regcache_get_val()
609 		return map->format.parse_val(regcache_get_val_addr(map, base,  in regcache_get_val()
612 	switch (map->cache_word_size) {  in regcache_get_val()
650 int regcache_lookup_reg(struct regmap *map, unsigned int reg)  in regcache_lookup_reg()  argument
658 	r = bsearch(&key, map->reg_defaults, map->num_reg_defaults,  in regcache_lookup_reg()
662 		return r - map->reg_defaults;  in regcache_lookup_reg()
675 static int regcache_sync_block_single(struct regmap *map, void *block,  in regcache_sync_block_single()  argument
684 		regtmp = block_base + (i * map->reg_stride);  in regcache_sync_block_single()
687 		    !regmap_writeable(map, regtmp))  in regcache_sync_block_single()
690 		val = regcache_get_val(map, block, i);  in regcache_sync_block_single()
691 		if (!regcache_reg_needs_sync(map, regtmp, val))  in regcache_sync_block_single()
694 		map->cache_bypass = true;  in regcache_sync_block_single()
696 		ret = _regmap_write(map, regtmp, val);  in regcache_sync_block_single()
698 		map->cache_bypass = false;  in regcache_sync_block_single()
700 			dev_err(map->dev, "Unable to sync register %#x. %d\n",  in regcache_sync_block_single()
704 		dev_dbg(map->dev, "Synced register %#x, value %#x\n",  in regcache_sync_block_single()
711 static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,  in regcache_sync_block_raw_flush()  argument
714 	size_t val_bytes = map->format.val_bytes;  in regcache_sync_block_raw_flush()
720 	count = (cur - base) / map->reg_stride;  in regcache_sync_block_raw_flush()
722 	dev_dbg(map->dev, "Writing %zu bytes for %d registers from 0x%x-0x%x\n",  in regcache_sync_block_raw_flush()
723 		count * val_bytes, count, base, cur - map->reg_stride);  in regcache_sync_block_raw_flush()
725 	map->cache_bypass = true;  in regcache_sync_block_raw_flush()
727 	ret = _regmap_raw_write(map, base, *data, count * val_bytes, false);  in regcache_sync_block_raw_flush()
729 		dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",  in regcache_sync_block_raw_flush()
730 			base, cur - map->reg_stride, ret);  in regcache_sync_block_raw_flush()
732 	map->cache_bypass = false;  in regcache_sync_block_raw_flush()
739 static int regcache_sync_block_raw(struct regmap *map, void *block,  in regcache_sync_block_raw()  argument
751 		regtmp = block_base + (i * map->reg_stride);  in regcache_sync_block_raw()
754 		    !regmap_writeable(map, regtmp)) {  in regcache_sync_block_raw()
755 			ret = regcache_sync_block_raw_flush(map, &data,  in regcache_sync_block_raw()
762 		val = regcache_get_val(map, block, i);  in regcache_sync_block_raw()
763 		if (!regcache_reg_needs_sync(map, regtmp, val)) {  in regcache_sync_block_raw()
764 			ret = regcache_sync_block_raw_flush(map, &data,  in regcache_sync_block_raw()
772 			data = regcache_get_val_addr(map, block, i);  in regcache_sync_block_raw()
777 	return regcache_sync_block_raw_flush(map, &data, base, regtmp +  in regcache_sync_block_raw()
778 			map->reg_stride);  in regcache_sync_block_raw()
781 int regcache_sync_block(struct regmap *map, void *block,  in regcache_sync_block()  argument
786 	if (regmap_can_raw_write(map) && !map->use_single_write)  in regcache_sync_block()
787 		return regcache_sync_block_raw(map, block, cache_present,  in regcache_sync_block()
790 		return regcache_sync_block_single(map, block, cache_present,  in regcache_sync_block()