284 static struct regmap *at24_translate_offset(struct at24_data *at24,  in at24_translate_offset()  argument
289 	if (at24->flags & AT24_FLAG_ADDR16) {  in at24_translate_offset()
297 	return at24->client_regmaps[i];  in at24_translate_offset()
300 static struct device *at24_base_client_dev(struct at24_data *at24)  in at24_base_client_dev()  argument
302 	return regmap_get_device(at24->client_regmaps[0]);  in at24_base_client_dev()
305 static size_t at24_adjust_read_count(struct at24_data *at24,  in at24_adjust_read_count()  argument
316 	if (at24->flags & AT24_FLAG_NO_RDROL) {  in at24_adjust_read_count()
317 		bits = (at24->flags & AT24_FLAG_ADDR16) ? 16 : 8;  in at24_adjust_read_count()
329 static ssize_t at24_regmap_read(struct at24_data *at24, char *buf,  in at24_regmap_read()  argument
336 	regmap = at24_translate_offset(at24, &offset);  in at24_regmap_read()
337 	count = at24_adjust_read_count(at24, offset, count);  in at24_regmap_read()
340 	offset += at24->offset_adj;  in at24_regmap_read()
371 static size_t at24_adjust_write_count(struct at24_data *at24,  in at24_adjust_write_count()  argument
377 	if (count > at24->write_max)  in at24_adjust_write_count()
378 		count = at24->write_max;  in at24_adjust_write_count()
381 	next_page = roundup(offset + 1, at24->page_size);  in at24_adjust_write_count()
388 static ssize_t at24_regmap_write(struct at24_data *at24, const char *buf,  in at24_regmap_write()  argument
395 	regmap = at24_translate_offset(at24, &offset);  in at24_regmap_write()
396 	count = at24_adjust_write_count(at24, offset, count);  in at24_regmap_write()
420 	struct at24_data *at24;  in at24_read()  local
425 	at24 = priv;  in at24_read()
426 	dev = at24_base_client_dev(at24);  in at24_read()
431 	if (off + count > at24->byte_len)  in at24_read()
444 	mutex_lock(&at24->lock);  in at24_read()
447 		ret = at24_regmap_read(at24, buf + i, off + i, count);  in at24_read()
449 			mutex_unlock(&at24->lock);  in at24_read()
455 	mutex_unlock(&at24->lock);  in at24_read()
459 	if (unlikely(at24->read_post))  in at24_read()
460 		at24->read_post(off, buf, i);  in at24_read()
467 	struct at24_data *at24;  in at24_write()  local
472 	at24 = priv;  in at24_write()
473 	dev = at24_base_client_dev(at24);  in at24_write()
478 	if (off + count > at24->byte_len)  in at24_write()
491 	mutex_lock(&at24->lock);  in at24_write()
494 		ret = at24_regmap_write(at24, buf, off, count);  in at24_write()
496 			mutex_unlock(&at24->lock);  in at24_write()
505 	mutex_unlock(&at24->lock);  in at24_write()
538 static int at24_make_dummy_client(struct at24_data *at24, unsigned int index,  in at24_make_dummy_client()  argument
548 						 (index << at24->bank_addr_shift));  in at24_make_dummy_client()
556 	at24->client_regmaps[index] = regmap;  in at24_make_dummy_client()
593 	struct at24_data *at24;  in at24_probe()  local
679 	at24 = devm_kzalloc(dev, struct_size(at24, client_regmaps, num_addresses),  in at24_probe()
681 	if (!at24)  in at24_probe()
684 	mutex_init(&at24->lock);  in at24_probe()
685 	at24->byte_len = byte_len;  in at24_probe()
686 	at24->page_size = page_size;  in at24_probe()
687 	at24->flags = flags;  in at24_probe()
688 	at24->read_post = cdata->read_post;  in at24_probe()
689 	at24->bank_addr_shift = cdata->bank_addr_shift;  in at24_probe()
690 	at24->num_addresses = num_addresses;  in at24_probe()
691 	at24->offset_adj = at24_get_offset_adj(flags, byte_len);  in at24_probe()
692 	at24->client_regmaps[0] = regmap;  in at24_probe()
694 	at24->vcc_reg = devm_regulator_get(dev, "vcc");  in at24_probe()
695 	if (IS_ERR(at24->vcc_reg))  in at24_probe()
696 		return PTR_ERR(at24->vcc_reg);  in at24_probe()
700 		at24->write_max = min_t(unsigned int,  in at24_probe()
702 		if (!i2c_fn_i2c && at24->write_max > I2C_SMBUS_BLOCK_MAX)  in at24_probe()
703 			at24->write_max = I2C_SMBUS_BLOCK_MAX;  in at24_probe()
708 		err = at24_make_dummy_client(at24, i, client, &regmap_config);  in at24_probe()
740 	nvmem_config.priv = at24;  in at24_probe()
745 	i2c_set_clientdata(client, at24);  in at24_probe()
749 		err = regulator_enable(at24->vcc_reg);  in at24_probe()
759 	at24->nvmem = devm_nvmem_register(dev, &nvmem_config);  in at24_probe()
760 	if (IS_ERR(at24->nvmem)) {  in at24_probe()
763 			regulator_disable(at24->vcc_reg);  in at24_probe()
764 		return PTR_ERR(at24->nvmem);  in at24_probe()
773 		err = at24_read(at24, 0, &test_byte, 1);  in at24_probe()
777 				regulator_disable(at24->vcc_reg);  in at24_probe()
786 			 byte_len, client->name, at24->write_max);  in at24_probe()
796 	struct at24_data *at24 = i2c_get_clientdata(client);  in at24_remove()  local
801 			regulator_disable(at24->vcc_reg);  in at24_remove()
809 	struct at24_data *at24 = i2c_get_clientdata(client);  in at24_suspend()  local
811 	return regulator_disable(at24->vcc_reg);  in at24_suspend()
817 	struct at24_data *at24 = i2c_get_clientdata(client);  in at24_resume()  local
819 	return regulator_enable(at24->vcc_reg);  in at24_resume()