278 static struct at24_client *at24_translate_offset(struct at24_data *at24,  in at24_translate_offset()  argument
283 	if (at24->flags & AT24_FLAG_ADDR16) {  in at24_translate_offset()
291 	return &at24->client[i];  in at24_translate_offset()
294 static struct device *at24_base_client_dev(struct at24_data *at24)  in at24_base_client_dev()  argument
296 	return &at24->client[0].client->dev;  in at24_base_client_dev()
299 static size_t at24_adjust_read_count(struct at24_data *at24,  in at24_adjust_read_count()  argument
310 	if (at24->flags & AT24_FLAG_NO_RDROL) {  in at24_adjust_read_count()
311 		bits = (at24->flags & AT24_FLAG_ADDR16) ? 16 : 8;  in at24_adjust_read_count()
323 static ssize_t at24_regmap_read(struct at24_data *at24, char *buf,  in at24_regmap_read()  argument
332 	at24_client = at24_translate_offset(at24, &offset);  in at24_regmap_read()
335 	count = at24_adjust_read_count(at24, offset, count);  in at24_regmap_read()
338 	offset += at24->offset_adj;  in at24_regmap_read()
369 static size_t at24_adjust_write_count(struct at24_data *at24,  in at24_adjust_write_count()  argument
375 	if (count > at24->write_max)  in at24_adjust_write_count()
376 		count = at24->write_max;  in at24_adjust_write_count()
379 	next_page = roundup(offset + 1, at24->page_size);  in at24_adjust_write_count()
386 static ssize_t at24_regmap_write(struct at24_data *at24, const char *buf,  in at24_regmap_write()  argument
395 	at24_client = at24_translate_offset(at24, &offset);  in at24_regmap_write()
398 	count = at24_adjust_write_count(at24, offset, count);  in at24_regmap_write()
422 	struct at24_data *at24;  in at24_read()  local
427 	at24 = priv;  in at24_read()
428 	dev = at24_base_client_dev(at24);  in at24_read()
433 	if (off + count > at24->byte_len)  in at24_read()
446 	mutex_lock(&at24->lock);  in at24_read()
449 		ret = at24_regmap_read(at24, buf + i, off + i, count);  in at24_read()
451 			mutex_unlock(&at24->lock);  in at24_read()
457 	mutex_unlock(&at24->lock);  in at24_read()
461 	if (unlikely(at24->read_post))  in at24_read()
462 		at24->read_post(off, buf, i);  in at24_read()
469 	struct at24_data *at24;  in at24_write()  local
474 	at24 = priv;  in at24_write()
475 	dev = at24_base_client_dev(at24);  in at24_write()
480 	if (off + count > at24->byte_len)  in at24_write()
493 	mutex_lock(&at24->lock);  in at24_write()
496 		ret = at24_regmap_write(at24, buf, off, count);  in at24_write()
498 			mutex_unlock(&at24->lock);  in at24_write()
507 	mutex_unlock(&at24->lock);  in at24_write()
540 static int at24_make_dummy_client(struct at24_data *at24, unsigned int index,  in at24_make_dummy_client()  argument
547 	base_client = at24->client[0].client;  in at24_make_dummy_client()
559 	at24->client[index].client = dummy_client;  in at24_make_dummy_client()
560 	at24->client[index].regmap = regmap;  in at24_make_dummy_client()
597 	struct at24_data *at24;  in at24_probe()  local
682 	at24 = devm_kzalloc(dev, struct_size(at24, client, num_addresses),  in at24_probe()
684 	if (!at24)  in at24_probe()
687 	mutex_init(&at24->lock);  in at24_probe()
688 	at24->byte_len = byte_len;  in at24_probe()
689 	at24->page_size = page_size;  in at24_probe()
690 	at24->flags = flags;  in at24_probe()
691 	at24->read_post = cdata->read_post;  in at24_probe()
692 	at24->num_addresses = num_addresses;  in at24_probe()
693 	at24->offset_adj = at24_get_offset_adj(flags, byte_len);  in at24_probe()
694 	at24->client[0].client = client;  in at24_probe()
695 	at24->client[0].regmap = regmap;  in at24_probe()
697 	at24->vcc_reg = devm_regulator_get(dev, "vcc");  in at24_probe()
698 	if (IS_ERR(at24->vcc_reg))  in at24_probe()
699 		return PTR_ERR(at24->vcc_reg);  in at24_probe()
703 		at24->write_max = min_t(unsigned int,  in at24_probe()
705 		if (!i2c_fn_i2c && at24->write_max > I2C_SMBUS_BLOCK_MAX)  in at24_probe()
706 			at24->write_max = I2C_SMBUS_BLOCK_MAX;  in at24_probe()
711 		err = at24_make_dummy_client(at24, i, &regmap_config);  in at24_probe()
743 	nvmem_config.priv = at24;  in at24_probe()
748 	i2c_set_clientdata(client, at24);  in at24_probe()
750 	err = regulator_enable(at24->vcc_reg);  in at24_probe()
760 	at24->nvmem = devm_nvmem_register(dev, &nvmem_config);  in at24_probe()
761 	if (IS_ERR(at24->nvmem)) {  in at24_probe()
764 			regulator_disable(at24->vcc_reg);  in at24_probe()
765 		return PTR_ERR(at24->nvmem);  in at24_probe()
772 	err = at24_read(at24, 0, &test_byte, 1);  in at24_probe()
776 			regulator_disable(at24->vcc_reg);  in at24_probe()
784 			 byte_len, client->name, at24->write_max);  in at24_probe()
794 	struct at24_data *at24 = i2c_get_clientdata(client);  in at24_remove()  local
798 		regulator_disable(at24->vcc_reg);  in at24_remove()
807 	struct at24_data *at24 = i2c_get_clientdata(client);  in at24_suspend()  local
809 	return regulator_disable(at24->vcc_reg);  in at24_suspend()
815 	struct at24_data *at24 = i2c_get_clientdata(client);  in at24_resume()  local
817 	return regulator_enable(at24->vcc_reg);  in at24_resume()