44 static int regcache_hw_init(struct regmap *map)  in regcache_hw_init()  argument
52 	if (!map->num_reg_defaults_raw)  in regcache_hw_init()
56 	for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++)  in regcache_hw_init()
57 		if (regmap_readable(map, i * map->reg_stride) &&  in regcache_hw_init()
58 		    !regmap_volatile(map, i * map->reg_stride))  in regcache_hw_init()
63 		map->cache_bypass = true;  in regcache_hw_init()
67 	map->num_reg_defaults = count;  in regcache_hw_init()
68 	map->reg_defaults = kmalloc_array(count, sizeof(struct reg_default),  in regcache_hw_init()
70 	if (!map->reg_defaults)  in regcache_hw_init()
73 	if (!map->reg_defaults_raw) {  in regcache_hw_init()
74 		bool cache_bypass = map->cache_bypass;  in regcache_hw_init()
75 		dev_warn(map->dev, "No cache defaults, reading back from HW\n");  in regcache_hw_init()
78 		map->cache_bypass = true;  in regcache_hw_init()
79 		tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);  in regcache_hw_init()
84 		ret = regmap_raw_read(map, 0, tmp_buf,  in regcache_hw_init()
85 				      map->cache_size_raw);  in regcache_hw_init()
86 		map->cache_bypass = cache_bypass;  in regcache_hw_init()
88 			map->reg_defaults_raw = tmp_buf;  in regcache_hw_init()
89 			map->cache_free = true;  in regcache_hw_init()
96 	for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) {  in regcache_hw_init()
97 		reg = i * map->reg_stride;  in regcache_hw_init()
99 		if (!regmap_readable(map, reg))  in regcache_hw_init()
102 		if (regmap_volatile(map, reg))  in regcache_hw_init()
105 		if (map->reg_defaults_raw) {  in regcache_hw_init()
106 			val = regcache_get_val(map, map->reg_defaults_raw, i);  in regcache_hw_init()
108 			bool cache_bypass = map->cache_bypass;  in regcache_hw_init()
110 			map->cache_bypass = true;  in regcache_hw_init()
111 			ret = regmap_read(map, reg, &val);  in regcache_hw_init()
112 			map->cache_bypass = cache_bypass;  in regcache_hw_init()
114 				dev_err(map->dev, "Failed to read %d: %d\n",  in regcache_hw_init()
120 		map->reg_defaults[j].reg = reg;  in regcache_hw_init()
121 		map->reg_defaults[j].def = val;  in regcache_hw_init()
128 	kfree(map->reg_defaults);  in regcache_hw_init()
133 int regcache_init(struct regmap *map, const struct regmap_config *config)  in regcache_init()  argument
139 	if (map->cache_type == REGCACHE_NONE) {  in regcache_init()
141 			dev_warn(map->dev,  in regcache_init()
144 		map->cache_bypass = true;  in regcache_init()
149 		dev_err(map->dev,  in regcache_init()
155 		dev_err(map->dev,  in regcache_init()
161 		if (config->reg_defaults[i].reg % map->reg_stride)  in regcache_init()
165 		if (cache_types[i]->type == map->cache_type)  in regcache_init()
169 		dev_err(map->dev, "Could not match cache type: %d\n",  in regcache_init()
170 			map->cache_type);  in regcache_init()
174 	map->num_reg_defaults = config->num_reg_defaults;  in regcache_init()
175 	map->num_reg_defaults_raw = config->num_reg_defaults_raw;  in regcache_init()
176 	map->reg_defaults_raw = config->reg_defaults_raw;  in regcache_init()
177 	map->cache_word_size = BITS_TO_BYTES(config->val_bits);  in regcache_init()
178 	map->cache_size_raw = map->cache_word_size * config->num_reg_defaults_raw;  in regcache_init()
180 	map->cache = NULL;  in regcache_init()
181 	map->cache_ops = cache_types[i];  in regcache_init()
183 	if (!map->cache_ops->read ||  in regcache_init()
184 	    !map->cache_ops->write ||  in regcache_init()
185 	    !map->cache_ops->name)  in regcache_init()
193 		tmp_buf = kmemdup_array(config->reg_defaults, map->num_reg_defaults,  in regcache_init()
194 					sizeof(*map->reg_defaults), GFP_KERNEL);  in regcache_init()
197 		map->reg_defaults = tmp_buf;  in regcache_init()
198 	} else if (map->num_reg_defaults_raw) {  in regcache_init()
203 		ret = regcache_hw_init(map);  in regcache_init()
206 		if (map->cache_bypass)  in regcache_init()
210 	if (!map->max_register_is_set && map->num_reg_defaults_raw) {  in regcache_init()
211 		map->max_register = (map->num_reg_defaults_raw  - 1) * map->reg_stride;  in regcache_init()
212 		map->max_register_is_set = true;  in regcache_init()
215 	if (map->cache_ops->init) {  in regcache_init()
216 		dev_dbg(map->dev, "Initializing %s cache\n",  in regcache_init()
217 			map->cache_ops->name);  in regcache_init()
218 		map->lock(map->lock_arg);  in regcache_init()
219 		ret = map->cache_ops->init(map);  in regcache_init()
220 		map->unlock(map->lock_arg);  in regcache_init()
227 	kfree(map->reg_defaults);  in regcache_init()
228 	if (map->cache_free)  in regcache_init()
229 		kfree(map->reg_defaults_raw);  in regcache_init()
234 void regcache_exit(struct regmap *map)  in regcache_exit()  argument
236 	if (map->cache_type == REGCACHE_NONE)  in regcache_exit()
239 	BUG_ON(!map->cache_ops);  in regcache_exit()
241 	kfree(map->reg_defaults);  in regcache_exit()
242 	if (map->cache_free)  in regcache_exit()
243 		kfree(map->reg_defaults_raw);  in regcache_exit()
245 	if (map->cache_ops->exit) {  in regcache_exit()
246 		dev_dbg(map->dev, "Destroying %s cache\n",  in regcache_exit()
247 			map->cache_ops->name);  in regcache_exit()
248 		map->lock(map->lock_arg);  in regcache_exit()
249 		map->cache_ops->exit(map);  in regcache_exit()
250 		map->unlock(map->lock_arg);  in regcache_exit()
257  * @map: map to configure.
263 int regcache_read(struct regmap *map,  in regcache_read()  argument
268 	if (map->cache_type == REGCACHE_NONE)  in regcache_read()
271 	BUG_ON(!map->cache_ops);  in regcache_read()
273 	if (!regmap_volatile(map, reg)) {  in regcache_read()
274 		ret = map->cache_ops->read(map, reg, value);  in regcache_read()
277 			trace_regmap_reg_read_cache(map, reg, *value);  in regcache_read()
288  * @map: map to configure.
294 int regcache_write(struct regmap *map,  in regcache_write()  argument
297 	if (map->cache_type == REGCACHE_NONE)  in regcache_write()
300 	BUG_ON(!map->cache_ops);  in regcache_write()
302 	if (!regmap_volatile(map, reg))  in regcache_write()
303 		return map->cache_ops->write(map, reg, value);  in regcache_write()
308 bool regcache_reg_needs_sync(struct regmap *map, unsigned int reg,  in regcache_reg_needs_sync()  argument
313 	if (!regmap_writeable(map, reg))  in regcache_reg_needs_sync()
317 	if (!map->no_sync_defaults)  in regcache_reg_needs_sync()
321 	ret = regcache_lookup_reg(map, reg);  in regcache_reg_needs_sync()
322 	if (ret >= 0 && val == map->reg_defaults[ret].def)  in regcache_reg_needs_sync()
327 static int regcache_default_sync(struct regmap *map, unsigned int min,  in regcache_default_sync()  argument
332 	for (reg = min; reg <= max; reg += map->reg_stride) {  in regcache_default_sync()
336 		if (regmap_volatile(map, reg) ||  in regcache_default_sync()
337 		    !regmap_writeable(map, reg))  in regcache_default_sync()
340 		ret = regcache_read(map, reg, &val);  in regcache_default_sync()
346 		if (!regcache_reg_needs_sync(map, reg, val))  in regcache_default_sync()
349 		map->cache_bypass = true;  in regcache_default_sync()
350 		ret = _regmap_write(map, reg, val);  in regcache_default_sync()
351 		map->cache_bypass = false;  in regcache_default_sync()
353 			dev_err(map->dev, "Unable to sync register %#x. %d\n",  in regcache_default_sync()
357 		dev_dbg(map->dev, "Synced register %#x, value %#x\n", reg, val);  in regcache_default_sync()
371  * @map: map to configure.
379 int regcache_sync(struct regmap *map)  in regcache_sync()  argument
387 	if (WARN_ON(map->cache_type == REGCACHE_NONE))  in regcache_sync()
390 	BUG_ON(!map->cache_ops);  in regcache_sync()
392 	map->lock(map->lock_arg);  in regcache_sync()
394 	bypass = map->cache_bypass;  in regcache_sync()
395 	dev_dbg(map->dev, "Syncing %s cache\n",  in regcache_sync()
396 		map->cache_ops->name);  in regcache_sync()
397 	name = map->cache_ops->name;  in regcache_sync()
398 	trace_regcache_sync(map, name, "start");  in regcache_sync()
400 	if (!map->cache_dirty)  in regcache_sync()
404 	map->cache_bypass = true;  in regcache_sync()
405 	for (i = 0; i < map->patch_regs; i++) {  in regcache_sync()
406 		ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);  in regcache_sync()
408 			dev_err(map->dev, "Failed to write %x = %x: %d\n",  in regcache_sync()
409 				map->patch[i].reg, map->patch[i].def, ret);  in regcache_sync()
413 	map->cache_bypass = false;  in regcache_sync()
415 	if (map->cache_ops->sync)  in regcache_sync()
416 		ret = map->cache_ops->sync(map, 0, map->max_register);  in regcache_sync()
418 		ret = regcache_default_sync(map, 0, map->max_register);  in regcache_sync()
421 		map->cache_dirty = false;  in regcache_sync()
425 	map->cache_bypass = bypass;  in regcache_sync()
426 	map->no_sync_defaults = false;  in regcache_sync()
434 	rb_for_each(node, NULL, &map->range_tree, rbtree_all) {  in regcache_sync()
439 		if (regcache_read(map, this->selector_reg, &i) != 0)  in regcache_sync()
442 		ret = _regmap_write(map, this->selector_reg, i);  in regcache_sync()
444 			dev_err(map->dev, "Failed to write %x = %x: %d\n",  in regcache_sync()
450 	map->unlock(map->lock_arg);  in regcache_sync()
452 	regmap_async_complete(map);  in regcache_sync()
454 	trace_regcache_sync(map, name, "stop");  in regcache_sync()
463  * @map: map to sync.
472 int regcache_sync_region(struct regmap *map, unsigned int min,  in regcache_sync_region()  argument
479 	if (WARN_ON(map->cache_type == REGCACHE_NONE))  in regcache_sync_region()
482 	BUG_ON(!map->cache_ops);  in regcache_sync_region()
484 	map->lock(map->lock_arg);  in regcache_sync_region()
487 	bypass = map->cache_bypass;  in regcache_sync_region()
489 	name = map->cache_ops->name;  in regcache_sync_region()
490 	dev_dbg(map->dev, "Syncing %s cache from %d-%d\n", name, min, max);  in regcache_sync_region()
492 	trace_regcache_sync(map, name, "start region");  in regcache_sync_region()
494 	if (!map->cache_dirty)  in regcache_sync_region()
497 	map->async = true;  in regcache_sync_region()
499 	if (map->cache_ops->sync)  in regcache_sync_region()
500 		ret = map->cache_ops->sync(map, min, max);  in regcache_sync_region()
502 		ret = regcache_default_sync(map, min, max);  in regcache_sync_region()
506 	map->cache_bypass = bypass;  in regcache_sync_region()
507 	map->async = false;  in regcache_sync_region()
508 	map->no_sync_defaults = false;  in regcache_sync_region()
509 	map->unlock(map->lock_arg);  in regcache_sync_region()
511 	regmap_async_complete(map);  in regcache_sync_region()
513 	trace_regcache_sync(map, name, "stop region");  in regcache_sync_region()
522  * @map: map to operate on
530 int regcache_drop_region(struct regmap *map, unsigned int min,  in regcache_drop_region()  argument
535 	if (!map->cache_ops || !map->cache_ops->drop)  in regcache_drop_region()
538 	map->lock(map->lock_arg);  in regcache_drop_region()
540 	trace_regcache_drop_region(map, min, max);  in regcache_drop_region()
542 	ret = map->cache_ops->drop(map, min, max);  in regcache_drop_region()
544 	map->unlock(map->lock_arg);  in regcache_drop_region()
551  * regcache_cache_only - Put a register map into cache only mode
553  * @map: map to configure
556  * When a register map is marked as cache only writes to the register
557  * map API will only update the register cache, they will not cause
562 void regcache_cache_only(struct regmap *map, bool enable)  in regcache_cache_only()  argument
564 	map->lock(map->lock_arg);  in regcache_cache_only()
565 	WARN_ON(map->cache_type != REGCACHE_NONE &&  in regcache_cache_only()
566 		map->cache_bypass && enable);  in regcache_cache_only()
567 	map->cache_only = enable;  in regcache_cache_only()
568 	trace_regmap_cache_only(map, enable);  in regcache_cache_only()
569 	map->unlock(map->lock_arg);  in regcache_cache_only()
576  * @map: map to mark
586 void regcache_mark_dirty(struct regmap *map)  in regcache_mark_dirty()  argument
588 	map->lock(map->lock_arg);  in regcache_mark_dirty()
589 	map->cache_dirty = true;  in regcache_mark_dirty()
590 	map->no_sync_defaults = true;  in regcache_mark_dirty()
591 	map->unlock(map->lock_arg);  in regcache_mark_dirty()
596  * regcache_cache_bypass - Put a register map into cache bypass mode
598  * @map: map to configure
601  * When a register map is marked with the cache bypass option, writes
602  * to the register map API will only update the hardware and not
606 void regcache_cache_bypass(struct regmap *map, bool enable)  in regcache_cache_bypass()  argument
608 	map->lock(map->lock_arg);  in regcache_cache_bypass()
609 	WARN_ON(map->cache_only && enable);  in regcache_cache_bypass()
610 	map->cache_bypass = enable;  in regcache_cache_bypass()
611 	trace_regmap_cache_bypass(map, enable);  in regcache_cache_bypass()
612 	map->unlock(map->lock_arg);  in regcache_cache_bypass()
619  * @map: map to check
624 bool regcache_reg_cached(struct regmap *map, unsigned int reg)  in regcache_reg_cached()  argument
629 	map->lock(map->lock_arg);  in regcache_reg_cached()
631 	ret = regcache_read(map, reg, &val);  in regcache_reg_cached()
633 	map->unlock(map->lock_arg);  in regcache_reg_cached()
639 void regcache_set_val(struct regmap *map, void *base, unsigned int idx,  in regcache_set_val()  argument
643 	if (map->format.format_val) {  in regcache_set_val()
644 		map->format.format_val(base + (map->cache_word_size * idx),  in regcache_set_val()
649 	switch (map->cache_word_size) {  in regcache_set_val()
673 unsigned int regcache_get_val(struct regmap *map, const void *base,  in regcache_get_val()  argument
680 	if (map->format.parse_val)  in regcache_get_val()
681 		return map->format.parse_val(regcache_get_val_addr(map, base,  in regcache_get_val()
684 	switch (map->cache_word_size) {  in regcache_get_val()
715 int regcache_lookup_reg(struct regmap *map, unsigned int reg)  in regcache_lookup_reg()  argument
723 	r = bsearch(&key, map->reg_defaults, map->num_reg_defaults,  in regcache_lookup_reg()
727 		return r - map->reg_defaults;  in regcache_lookup_reg()
740 int regcache_sync_val(struct regmap *map, unsigned int reg, unsigned int val)  in regcache_sync_val()  argument
744 	if (!regcache_reg_needs_sync(map, reg, val))  in regcache_sync_val()
747 	map->cache_bypass = true;  in regcache_sync_val()
749 	ret = _regmap_write(map, reg, val);  in regcache_sync_val()
751 	map->cache_bypass = false;  in regcache_sync_val()
754 		dev_err(map->dev, "Unable to sync register %#x. %d\n",  in regcache_sync_val()
758 	dev_dbg(map->dev, "Synced register %#x, value %#x\n",  in regcache_sync_val()
764 static int regcache_sync_block_single(struct regmap *map, void *block,  in regcache_sync_block_single()  argument
773 		regtmp = block_base + (i * map->reg_stride);  in regcache_sync_block_single()
776 		    !regmap_writeable(map, regtmp))  in regcache_sync_block_single()
779 		val = regcache_get_val(map, block, i);  in regcache_sync_block_single()
780 		ret = regcache_sync_val(map, regtmp, val);  in regcache_sync_block_single()
788 static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,  in regcache_sync_block_raw_flush()  argument
791 	size_t val_bytes = map->format.val_bytes;  in regcache_sync_block_raw_flush()
797 	count = (cur - base) / map->reg_stride;  in regcache_sync_block_raw_flush()
799 	dev_dbg(map->dev, "Writing %zu bytes for %d registers from 0x%x-0x%x\n",  in regcache_sync_block_raw_flush()
800 		count * val_bytes, count, base, cur - map->reg_stride);  in regcache_sync_block_raw_flush()
802 	map->cache_bypass = true;  in regcache_sync_block_raw_flush()
804 	ret = _regmap_raw_write(map, base, *data, count * val_bytes, false);  in regcache_sync_block_raw_flush()
806 		dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",  in regcache_sync_block_raw_flush()
807 			base, cur - map->reg_stride, ret);  in regcache_sync_block_raw_flush()
809 	map->cache_bypass = false;  in regcache_sync_block_raw_flush()
816 static int regcache_sync_block_raw(struct regmap *map, void *block,  in regcache_sync_block_raw()  argument
828 		regtmp = block_base + (i * map->reg_stride);  in regcache_sync_block_raw()
831 		    !regmap_writeable(map, regtmp)) {  in regcache_sync_block_raw()
832 			ret = regcache_sync_block_raw_flush(map, &data,  in regcache_sync_block_raw()
839 		val = regcache_get_val(map, block, i);  in regcache_sync_block_raw()
840 		if (!regcache_reg_needs_sync(map, regtmp, val)) {  in regcache_sync_block_raw()
841 			ret = regcache_sync_block_raw_flush(map, &data,  in regcache_sync_block_raw()
849 			data = regcache_get_val_addr(map, block, i);  in regcache_sync_block_raw()
854 	return regcache_sync_block_raw_flush(map, &data, base, regtmp +  in regcache_sync_block_raw()
855 			map->reg_stride);  in regcache_sync_block_raw()
858 int regcache_sync_block(struct regmap *map, void *block,  in regcache_sync_block()  argument
863 	if (regmap_can_raw_write(map) && !map->use_single_write)  in regcache_sync_block()
864 		return regcache_sync_block_raw(map, block, cache_present,  in regcache_sync_block()
867 		return regcache_sync_block_single(map, block, cache_present,  in regcache_sync_block()