338 	struct nvmem_cell *cell = NULL;  in nvmem_cell_attr_read()  local
343 	cell = nvmem_create_cell(entry, entry->name, 0);  in nvmem_cell_attr_read()
344 	if (IS_ERR(cell))  in nvmem_cell_attr_read()
345 		return PTR_ERR(cell);  in nvmem_cell_attr_read()
347 	if (!cell)  in nvmem_cell_attr_read()
350 	content = nvmem_cell_read(cell, &cell_sz);  in nvmem_cell_attr_read()
361 	kfree_const(cell->id);  in nvmem_cell_attr_read()
362 	kfree(cell);  in nvmem_cell_attr_read()
478 	/* Initialize each attribute to take the name and size of the cell */  in nvmem_populate_sysfs_cells()
541 static void nvmem_cell_entry_drop(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_drop()  argument
543 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_REMOVE, cell);  in nvmem_cell_entry_drop()
545 	list_del(&cell->node);  in nvmem_cell_entry_drop()
547 	of_node_put(cell->np);  in nvmem_cell_entry_drop()
548 	kfree_const(cell->name);  in nvmem_cell_entry_drop()
549 	kfree(cell);  in nvmem_cell_entry_drop()
554 	struct nvmem_cell_entry *cell, *p;  in nvmem_device_remove_all_cells()  local
556 	list_for_each_entry_safe(cell, p, &nvmem->cells, node)  in nvmem_device_remove_all_cells()
557 		nvmem_cell_entry_drop(cell);  in nvmem_device_remove_all_cells()
560 static void nvmem_cell_entry_add(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_add()  argument
563 	list_add_tail(&cell->node, &cell->nvmem->cells);  in nvmem_cell_entry_add()
565 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_ADD, cell);  in nvmem_cell_entry_add()
570 						     struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry_nodup()  argument
572 	cell->nvmem = nvmem;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
573 	cell->offset = info->offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
574 	cell->raw_len = info->raw_len ?: info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
575 	cell->bytes = info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
576 	cell->name = info->name;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
577 	cell->read_post_process = info->read_post_process;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
578 	cell->priv = info->priv;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
580 	cell->bit_offset = info->bit_offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
581 	cell->nbits = info->nbits;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
582 	cell->np = info->np;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
584 	if (cell->nbits)  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
585 		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
588 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
590 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
591 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
600 					       struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry()  argument
604 	err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell_entry()
608 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell_entry()
609 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell_entry()
616  * nvmem_add_one_cell() - Add one cell information to an nvmem device
619  * @info: nvmem cell info to add to the device
626 	struct nvmem_cell_entry *cell;  in nvmem_add_one_cell()  local
629 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_one_cell()
630 	if (!cell)  in nvmem_add_one_cell()
633 	rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_one_cell()
635 		kfree(cell);  in nvmem_add_one_cell()
639 	nvmem_cell_entry_add(cell);  in nvmem_add_one_cell()
646  * nvmem_add_cells() - Add cell information to an nvmem device
649  * @info: nvmem cell info to add to the device
699 	struct nvmem_cell_entry *cell;  in nvmem_add_cells_from_table()  local
708 				cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_table()
709 				if (!cell) {  in nvmem_add_cells_from_table()
714 				rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_cells_from_table()
716 					kfree(cell);  in nvmem_add_cells_from_table()
720 				nvmem_cell_entry_add(cell);  in nvmem_add_cells_from_table()
733 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_name()  local
738 			cell = iter;  in nvmem_find_cell_entry_by_name()
744 	return cell;  in nvmem_find_cell_entry_by_name()
1143 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
1311 	struct nvmem_cell *cell;  in nvmem_create_cell()  local
1314 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_create_cell()
1315 	if (!cell)  in nvmem_create_cell()
1321 			kfree(cell);  in nvmem_create_cell()
1326 	cell->id = name;  in nvmem_create_cell()
1327 	cell->entry = entry;  in nvmem_create_cell()
1328 	cell->index = index;  in nvmem_create_cell()
1330 	return cell;  in nvmem_create_cell()
1337 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1357 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1365 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1367 				cell = nvmem_create_cell(cell_entry, con_id, 0);  in nvmem_cell_get_from_lookup()
1368 				if (IS_ERR(cell))  in nvmem_cell_get_from_lookup()
1376 	return cell;  in nvmem_cell_get_from_lookup()
1389 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_node()  local
1394 			cell = iter;  in nvmem_find_cell_entry_by_node()
1400 	return cell;  in nvmem_find_cell_entry_by_node()
1416  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1418  * @np: Device tree node that uses the nvmem cell.
1419  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1420  *      for the cell at index 0 (the lone cell with no accompanying
1421  *      nvmem-cell-names property).
1432 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1438 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1440 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1443 						  "#nvmem-cell-cells",  in of_nvmem_cell_get()
1495 	cell = nvmem_create_cell(cell_entry, id, cell_index);  in of_nvmem_cell_get()
1496 	if (IS_ERR(cell)) {  in of_nvmem_cell_get()
1501 	return cell;  in of_nvmem_cell_get()
1507  * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1509  * @dev: Device that requests the nvmem cell.
1510  * @id: nvmem cell name to get (this corresponds with the name from the
1511  *      nvmem-cell-names property for DT systems and with the con_id from
1520 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1523 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1524 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1525 			return cell;  in nvmem_cell_get()
1528 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1542  * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1544  * @dev: Device that requests the nvmem cell.
1545  * @id: nvmem cell name id to get.
1553 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1559 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1560 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1561 		*ptr = cell;  in devm_nvmem_cell_get()
1567 	return cell;  in devm_nvmem_cell_get()
1582  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1585  * @dev: Device that requests the nvmem cell.
1586  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1588 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1593 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1600  * nvmem_cell_put() - Release previously allocated nvmem cell.
1602  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1604 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1606 	struct nvmem_device *nvmem = cell->entry->nvmem;  in nvmem_cell_put()
1608 	if (cell->id)  in nvmem_cell_put()
1609 		kfree_const(cell->id);  in nvmem_cell_put()
1611 	kfree(cell);  in nvmem_cell_put()
1617 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1620 	int i, extra, bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1628 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1637 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1641 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1646 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1647 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1651 			     struct nvmem_cell_entry *cell,  in __nvmem_cell_read()  argument
1656 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1662 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1663 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1665 	if (cell->read_post_process) {  in __nvmem_cell_read()
1666 		rc = cell->read_post_process(cell->priv, id, index,  in __nvmem_cell_read()
1667 					     cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1673 		*len = cell->bytes;  in __nvmem_cell_read()
1679  * nvmem_cell_read() - Read a given nvmem cell
1681  * @cell: nvmem cell to be read.
1682  * @len: pointer to length of cell which will be populated on successful read;
1688 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1690 	struct nvmem_cell_entry *entry = cell->entry;  in nvmem_cell_read()
1702 	rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index);  in nvmem_cell_read()
1712 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell,  in nvmem_cell_prepare_write_buffer()  argument
1715 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1716 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1719 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1720 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1732 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1738 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1752 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1765 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len)  in __nvmem_cell_entry_write()  argument
1767 	struct nvmem_device *nvmem = cell->nvmem;  in __nvmem_cell_entry_write()
1771 	    (cell->bit_offset == 0 && len != cell->bytes))  in __nvmem_cell_entry_write()
1779 	if (cell->read_post_process)  in __nvmem_cell_entry_write()
1782 	if (cell->bit_offset || cell->nbits) {  in __nvmem_cell_entry_write()
1783 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in __nvmem_cell_entry_write()
1788 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_entry_write()
1791 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_entry_write()
1801  * nvmem_cell_write() - Write to a given nvmem cell
1803  * @cell: nvmem cell to be written.
1805  * @len: length of buffer to be written to nvmem cell.
1809 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1811 	return __nvmem_cell_entry_write(cell->entry, buf, len);  in nvmem_cell_write()
1819 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1823 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1824 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1825 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1827 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1829 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1834 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1839 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1845  * nvmem_cell_read_u8() - Read a cell value as a u8
1847  * @dev: Device that requests the nvmem cell.
1848  * @cell_id: Name of nvmem cell to read.
1860  * nvmem_cell_read_u16() - Read a cell value as a u16
1862  * @dev: Device that requests the nvmem cell.
1863  * @cell_id: Name of nvmem cell to read.
1875  * nvmem_cell_read_u32() - Read a cell value as a u32
1877  * @dev: Device that requests the nvmem cell.
1878  * @cell_id: Name of nvmem cell to read.
1890  * nvmem_cell_read_u64() - Read a cell value as a u64
1892  * @dev: Device that requests the nvmem cell.
1893  * @cell_id: Name of nvmem cell to read.
1908 	struct nvmem_cell *cell;  in nvmem_cell_read_variable_common()  local
1912 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_variable_common()
1913 	if (IS_ERR(cell))  in nvmem_cell_read_variable_common()
1914 		return cell;  in nvmem_cell_read_variable_common()
1916 	nbits = cell->entry->nbits;  in nvmem_cell_read_variable_common()
1917 	buf = nvmem_cell_read(cell, len);  in nvmem_cell_read_variable_common()
1918 	nvmem_cell_put(cell);  in nvmem_cell_read_variable_common()
1940  * @dev: Device that requests the nvmem cell.
1941  * @cell_id: Name of nvmem cell to read.
1971  * @dev: Device that requests the nvmem cell.
1972  * @cell_id: Name of nvmem cell to read.
2000  * nvmem_device_cell_read() - Read a given nvmem device and cell
2003  * @info: nvmem cell info to be read.
2012 	struct nvmem_cell_entry cell;  in nvmem_device_cell_read()  local
2019 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
2023 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0);  in nvmem_device_cell_read()
2032  * nvmem_device_cell_write() - Write cell to a given nvmem device
2035  * @info: nvmem cell info to be written.
2036  * @buf: buffer to be written to cell.
2043 	struct nvmem_cell_entry cell;  in nvmem_device_cell_write()  local
2049 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
2053 	return __nvmem_cell_entry_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
2087  * nvmem_device_write() - Write cell to a given nvmem device
2116  * nvmem_add_cell_table() - register a table of cell info entries
2118  * @table: table of cell info entries
2129  * nvmem_del_cell_table() - remove a previously registered cell info table
2131  * @table: table of cell info entries
2142  * nvmem_add_cell_lookups() - register a list of cell lookup entries
2144  * @entries: array of cell lookup entries
2145  * @nentries: number of cell lookup entries in the array
2159  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2162  * @entries: array of cell lookup entries
2163  * @nentries: number of cell lookup entries in the array