347 	struct nvmem_cell *cell = NULL;  in nvmem_cell_attr_read()  local
352 	cell = nvmem_create_cell(entry, entry->name, 0);  in nvmem_cell_attr_read()
353 	if (IS_ERR(cell))  in nvmem_cell_attr_read()
354 		return PTR_ERR(cell);  in nvmem_cell_attr_read()
356 	if (!cell)  in nvmem_cell_attr_read()
359 	content = nvmem_cell_read(cell, &cell_sz);  in nvmem_cell_attr_read()
370 	kfree_const(cell->id);  in nvmem_cell_attr_read()
371 	kfree(cell);  in nvmem_cell_attr_read()
489 	/* Initialize each attribute to take the name and size of the cell */  in nvmem_populate_sysfs_cells()
554 static void nvmem_cell_entry_drop(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_drop()  argument
556 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_REMOVE, cell);  in nvmem_cell_entry_drop()
558 	list_del(&cell->node);  in nvmem_cell_entry_drop()
560 	of_node_put(cell->np);  in nvmem_cell_entry_drop()
561 	kfree_const(cell->name);  in nvmem_cell_entry_drop()
562 	kfree(cell);  in nvmem_cell_entry_drop()
567 	struct nvmem_cell_entry *cell, *p;  in nvmem_device_remove_all_cells()  local
569 	list_for_each_entry_safe(cell, p, &nvmem->cells, node)  in nvmem_device_remove_all_cells()
570 		nvmem_cell_entry_drop(cell);  in nvmem_device_remove_all_cells()
573 static void nvmem_cell_entry_add(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_add()  argument
576 	list_add_tail(&cell->node, &cell->nvmem->cells);  in nvmem_cell_entry_add()
578 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_ADD, cell);  in nvmem_cell_entry_add()
583 						     struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry_nodup()  argument
585 	cell->nvmem = nvmem;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
586 	cell->offset = info->offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
587 	cell->raw_len = info->raw_len ?: info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
588 	cell->bytes = info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
589 	cell->name = info->name;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
590 	cell->read_post_process = info->read_post_process;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
591 	cell->priv = info->priv;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
593 	cell->bit_offset = info->bit_offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
594 	cell->nbits = info->nbits;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
595 	cell->np = info->np;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
597 	if (cell->nbits) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
598 		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
600 		cell->raw_len = ALIGN(cell->bytes, nvmem->word_size);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
603 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
605 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
606 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
610 	if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
612 			"cell %s raw len %zd unaligned to nvmem word size %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
613 			cell->name ?: "<unknown>", cell->raw_len,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
619 		cell->raw_len = ALIGN(cell->raw_len, nvmem->word_size);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
627 					       struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry()  argument
631 	err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell_entry()
635 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell_entry()
636 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell_entry()
643  * nvmem_add_one_cell() - Add one cell information to an nvmem device
646  * @info: nvmem cell info to add to the device
653 	struct nvmem_cell_entry *cell;  in nvmem_add_one_cell()  local
656 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_one_cell()
657 	if (!cell)  in nvmem_add_one_cell()
660 	rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_one_cell()
662 		kfree(cell);  in nvmem_add_one_cell()
666 	nvmem_cell_entry_add(cell);  in nvmem_add_one_cell()
673  * nvmem_add_cells() - Add cell information to an nvmem device
676  * @info: nvmem cell info to add to the device
726 	struct nvmem_cell_entry *cell;  in nvmem_add_cells_from_table()  local
735 				cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_table()
736 				if (!cell) {  in nvmem_add_cells_from_table()
741 				rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_cells_from_table()
743 					kfree(cell);  in nvmem_add_cells_from_table()
747 				nvmem_cell_entry_add(cell);  in nvmem_add_cells_from_table()
760 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_name()  local
765 			cell = iter;  in nvmem_find_cell_entry_by_name()
771 	return cell;  in nvmem_find_cell_entry_by_name()
1172 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
1340 	struct nvmem_cell *cell;  in nvmem_create_cell()  local
1343 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_create_cell()
1344 	if (!cell)  in nvmem_create_cell()
1350 			kfree(cell);  in nvmem_create_cell()
1355 	cell->id = name;  in nvmem_create_cell()
1356 	cell->entry = entry;  in nvmem_create_cell()
1357 	cell->index = index;  in nvmem_create_cell()
1359 	return cell;  in nvmem_create_cell()
1366 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1386 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1394 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1396 				cell = nvmem_create_cell(cell_entry, con_id, 0);  in nvmem_cell_get_from_lookup()
1397 				if (IS_ERR(cell))  in nvmem_cell_get_from_lookup()
1405 	return cell;  in nvmem_cell_get_from_lookup()
1418 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_node()  local
1423 			cell = iter;  in nvmem_find_cell_entry_by_node()
1429 	return cell;  in nvmem_find_cell_entry_by_node()
1445  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1447  * @np: Device tree node that uses the nvmem cell.
1448  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1449  *      for the cell at index 0 (the lone cell with no accompanying
1450  *      nvmem-cell-names property).
1461 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1467 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1469 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1472 						  "#nvmem-cell-cells",  in of_nvmem_cell_get()
1524 	cell = nvmem_create_cell(cell_entry, id, cell_index);  in of_nvmem_cell_get()
1525 	if (IS_ERR(cell)) {  in of_nvmem_cell_get()
1530 	return cell;  in of_nvmem_cell_get()
1536  * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1538  * @dev: Device that requests the nvmem cell.
1539  * @id: nvmem cell name to get (this corresponds with the name from the
1540  *      nvmem-cell-names property for DT systems and with the con_id from
1549 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1552 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1553 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1554 			return cell;  in nvmem_cell_get()
1557 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1571  * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1573  * @dev: Device that requests the nvmem cell.
1574  * @id: nvmem cell name id to get.
1582 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1588 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1589 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1590 		*ptr = cell;  in devm_nvmem_cell_get()
1596 	return cell;  in devm_nvmem_cell_get()
1611  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1614  * @dev: Device that requests the nvmem cell.
1615  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1617 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1622 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1629  * nvmem_cell_put() - Release previously allocated nvmem cell.
1631  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1633 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1635 	struct nvmem_device *nvmem = cell->entry->nvmem;  in nvmem_cell_put()
1637 	if (cell->id)  in nvmem_cell_put()
1638 		kfree_const(cell->id);  in nvmem_cell_put()
1640 	kfree(cell);  in nvmem_cell_put()
1646 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1650 	int bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1663 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1670 		memmove(p, b, cell->bytes - bytes_offset);  in nvmem_shift_read_buffer_in_place()
1671 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1674 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1678 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1683 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1684 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1688 			     struct nvmem_cell_entry *cell,  in __nvmem_cell_read()  argument
1693 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1699 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1700 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1702 	if (cell->read_post_process) {  in __nvmem_cell_read()
1703 		rc = cell->read_post_process(cell->priv, id, index,  in __nvmem_cell_read()
1704 					     cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1710 		*len = cell->bytes;  in __nvmem_cell_read()
1716  * nvmem_cell_read() - Read a given nvmem cell
1718  * @cell: nvmem cell to be read.
1719  * @len: pointer to length of cell which will be populated on successful read;
1725 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1727 	struct nvmem_cell_entry *entry = cell->entry;  in nvmem_cell_read()
1739 	rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index);  in nvmem_cell_read()
1749 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell,  in nvmem_cell_prepare_write_buffer()  argument
1752 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1753 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1756 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1757 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1769 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1775 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1789 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1802 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len)  in __nvmem_cell_entry_write()  argument
1804 	struct nvmem_device *nvmem = cell->nvmem;  in __nvmem_cell_entry_write()
1808 	    (cell->bit_offset == 0 && len != cell->bytes))  in __nvmem_cell_entry_write()
1816 	if (cell->read_post_process)  in __nvmem_cell_entry_write()
1819 	if (cell->bit_offset || cell->nbits) {  in __nvmem_cell_entry_write()
1820 		if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes)  in __nvmem_cell_entry_write()
1822 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in __nvmem_cell_entry_write()
1827 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_entry_write()
1830 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_entry_write()
1840  * nvmem_cell_write() - Write to a given nvmem cell
1842  * @cell: nvmem cell to be written.
1844  * @len: length of buffer to be written to nvmem cell.
1848 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1850 	return __nvmem_cell_entry_write(cell->entry, buf, len);  in nvmem_cell_write()
1858 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1862 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1863 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1864 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1866 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1868 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1873 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1878 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1884  * nvmem_cell_read_u8() - Read a cell value as a u8
1886  * @dev: Device that requests the nvmem cell.
1887  * @cell_id: Name of nvmem cell to read.
1899  * nvmem_cell_read_u16() - Read a cell value as a u16
1901  * @dev: Device that requests the nvmem cell.
1902  * @cell_id: Name of nvmem cell to read.
1914  * nvmem_cell_read_u32() - Read a cell value as a u32
1916  * @dev: Device that requests the nvmem cell.
1917  * @cell_id: Name of nvmem cell to read.
1929  * nvmem_cell_read_u64() - Read a cell value as a u64
1931  * @dev: Device that requests the nvmem cell.
1932  * @cell_id: Name of nvmem cell to read.
1947 	struct nvmem_cell *cell;  in nvmem_cell_read_variable_common()  local
1951 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_variable_common()
1952 	if (IS_ERR(cell))  in nvmem_cell_read_variable_common()
1953 		return cell;  in nvmem_cell_read_variable_common()
1955 	nbits = cell->entry->nbits;  in nvmem_cell_read_variable_common()
1956 	buf = nvmem_cell_read(cell, len);  in nvmem_cell_read_variable_common()
1957 	nvmem_cell_put(cell);  in nvmem_cell_read_variable_common()
1979  * @dev: Device that requests the nvmem cell.
1980  * @cell_id: Name of nvmem cell to read.
2010  * @dev: Device that requests the nvmem cell.
2011  * @cell_id: Name of nvmem cell to read.
2039  * nvmem_device_cell_read() - Read a given nvmem device and cell
2042  * @info: nvmem cell info to be read.
2051 	struct nvmem_cell_entry cell;  in nvmem_device_cell_read()  local
2058 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
2062 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0);  in nvmem_device_cell_read()
2071  * nvmem_device_cell_write() - Write cell to a given nvmem device
2074  * @info: nvmem cell info to be written.
2075  * @buf: buffer to be written to cell.
2082 	struct nvmem_cell_entry cell;  in nvmem_device_cell_write()  local
2088 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
2092 	return __nvmem_cell_entry_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
2126  * nvmem_device_write() - Write cell to a given nvmem device
2155  * nvmem_add_cell_table() - register a table of cell info entries
2157  * @table: table of cell info entries
2168  * nvmem_del_cell_table() - remove a previously registered cell info table
2170  * @table: table of cell info entries
2181  * nvmem_add_cell_lookups() - register a list of cell lookup entries
2183  * @entries: array of cell lookup entries
2184  * @nentries: number of cell lookup entries in the array
2198  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2201  * @entries: array of cell lookup entries
2202  * @nentries: number of cell lookup entries in the array