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()
601 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
603 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
604 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
613 					       struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry()  argument
617 	err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell_entry()
621 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell_entry()
622 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell_entry()
629  * nvmem_add_one_cell() - Add one cell information to an nvmem device
632  * @info: nvmem cell info to add to the device
639 	struct nvmem_cell_entry *cell;  in nvmem_add_one_cell()  local
642 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_one_cell()
643 	if (!cell)  in nvmem_add_one_cell()
646 	rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_one_cell()
648 		kfree(cell);  in nvmem_add_one_cell()
652 	nvmem_cell_entry_add(cell);  in nvmem_add_one_cell()
659  * nvmem_add_cells() - Add cell information to an nvmem device
662  * @info: nvmem cell info to add to the device
712 	struct nvmem_cell_entry *cell;  in nvmem_add_cells_from_table()  local
721 				cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_table()
722 				if (!cell) {  in nvmem_add_cells_from_table()
727 				rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_cells_from_table()
729 					kfree(cell);  in nvmem_add_cells_from_table()
733 				nvmem_cell_entry_add(cell);  in nvmem_add_cells_from_table()
746 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_name()  local
751 			cell = iter;  in nvmem_find_cell_entry_by_name()
757 	return cell;  in nvmem_find_cell_entry_by_name()
1156 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
1324 	struct nvmem_cell *cell;  in nvmem_create_cell()  local
1327 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_create_cell()
1328 	if (!cell)  in nvmem_create_cell()
1334 			kfree(cell);  in nvmem_create_cell()
1339 	cell->id = name;  in nvmem_create_cell()
1340 	cell->entry = entry;  in nvmem_create_cell()
1341 	cell->index = index;  in nvmem_create_cell()
1343 	return cell;  in nvmem_create_cell()
1350 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1370 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1378 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1380 				cell = nvmem_create_cell(cell_entry, con_id, 0);  in nvmem_cell_get_from_lookup()
1381 				if (IS_ERR(cell))  in nvmem_cell_get_from_lookup()
1389 	return cell;  in nvmem_cell_get_from_lookup()
1402 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_node()  local
1407 			cell = iter;  in nvmem_find_cell_entry_by_node()
1413 	return cell;  in nvmem_find_cell_entry_by_node()
1429  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1431  * @np: Device tree node that uses the nvmem cell.
1432  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1433  *      for the cell at index 0 (the lone cell with no accompanying
1434  *      nvmem-cell-names property).
1445 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1451 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1453 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1456 						  "#nvmem-cell-cells",  in of_nvmem_cell_get()
1508 	cell = nvmem_create_cell(cell_entry, id, cell_index);  in of_nvmem_cell_get()
1509 	if (IS_ERR(cell)) {  in of_nvmem_cell_get()
1514 	return cell;  in of_nvmem_cell_get()
1520  * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1522  * @dev: Device that requests the nvmem cell.
1523  * @id: nvmem cell name to get (this corresponds with the name from the
1524  *      nvmem-cell-names property for DT systems and with the con_id from
1533 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1536 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1537 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1538 			return cell;  in nvmem_cell_get()
1541 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1555  * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1557  * @dev: Device that requests the nvmem cell.
1558  * @id: nvmem cell name id to get.
1566 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1572 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1573 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1574 		*ptr = cell;  in devm_nvmem_cell_get()
1580 	return cell;  in devm_nvmem_cell_get()
1595  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1598  * @dev: Device that requests the nvmem cell.
1599  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1601 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1606 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1613  * nvmem_cell_put() - Release previously allocated nvmem cell.
1615  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1617 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1619 	struct nvmem_device *nvmem = cell->entry->nvmem;  in nvmem_cell_put()
1621 	if (cell->id)  in nvmem_cell_put()
1622 		kfree_const(cell->id);  in nvmem_cell_put()
1624 	kfree(cell);  in nvmem_cell_put()
1630 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1633 	int i, extra, bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1641 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1650 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1654 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1659 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1660 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1664 			     struct nvmem_cell_entry *cell,  in __nvmem_cell_read()  argument
1669 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1675 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1676 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1678 	if (cell->read_post_process) {  in __nvmem_cell_read()
1679 		rc = cell->read_post_process(cell->priv, id, index,  in __nvmem_cell_read()
1680 					     cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1686 		*len = cell->bytes;  in __nvmem_cell_read()
1692  * nvmem_cell_read() - Read a given nvmem cell
1694  * @cell: nvmem cell to be read.
1695  * @len: pointer to length of cell which will be populated on successful read;
1701 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1703 	struct nvmem_cell_entry *entry = cell->entry;  in nvmem_cell_read()
1715 	rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index);  in nvmem_cell_read()
1725 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell,  in nvmem_cell_prepare_write_buffer()  argument
1728 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1729 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1732 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1733 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1745 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1751 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1765 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1778 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len)  in __nvmem_cell_entry_write()  argument
1780 	struct nvmem_device *nvmem = cell->nvmem;  in __nvmem_cell_entry_write()
1784 	    (cell->bit_offset == 0 && len != cell->bytes))  in __nvmem_cell_entry_write()
1792 	if (cell->read_post_process)  in __nvmem_cell_entry_write()
1795 	if (cell->bit_offset || cell->nbits) {  in __nvmem_cell_entry_write()
1796 		if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes)  in __nvmem_cell_entry_write()
1798 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in __nvmem_cell_entry_write()
1803 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_entry_write()
1806 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_entry_write()
1816  * nvmem_cell_write() - Write to a given nvmem cell
1818  * @cell: nvmem cell to be written.
1820  * @len: length of buffer to be written to nvmem cell.
1824 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1826 	return __nvmem_cell_entry_write(cell->entry, buf, len);  in nvmem_cell_write()
1834 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1838 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1839 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1840 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1842 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1844 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1849 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1854 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1860  * nvmem_cell_read_u8() - Read a cell value as a u8
1862  * @dev: Device that requests the nvmem cell.
1863  * @cell_id: Name of nvmem cell to read.
1875  * nvmem_cell_read_u16() - Read a cell value as a u16
1877  * @dev: Device that requests the nvmem cell.
1878  * @cell_id: Name of nvmem cell to read.
1890  * nvmem_cell_read_u32() - Read a cell value as a u32
1892  * @dev: Device that requests the nvmem cell.
1893  * @cell_id: Name of nvmem cell to read.
1905  * nvmem_cell_read_u64() - Read a cell value as a u64
1907  * @dev: Device that requests the nvmem cell.
1908  * @cell_id: Name of nvmem cell to read.
1923 	struct nvmem_cell *cell;  in nvmem_cell_read_variable_common()  local
1927 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_variable_common()
1928 	if (IS_ERR(cell))  in nvmem_cell_read_variable_common()
1929 		return cell;  in nvmem_cell_read_variable_common()
1931 	nbits = cell->entry->nbits;  in nvmem_cell_read_variable_common()
1932 	buf = nvmem_cell_read(cell, len);  in nvmem_cell_read_variable_common()
1933 	nvmem_cell_put(cell);  in nvmem_cell_read_variable_common()
1955  * @dev: Device that requests the nvmem cell.
1956  * @cell_id: Name of nvmem cell to read.
1986  * @dev: Device that requests the nvmem cell.
1987  * @cell_id: Name of nvmem cell to read.
2015  * nvmem_device_cell_read() - Read a given nvmem device and cell
2018  * @info: nvmem cell info to be read.
2027 	struct nvmem_cell_entry cell;  in nvmem_device_cell_read()  local
2034 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
2038 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0);  in nvmem_device_cell_read()
2047  * nvmem_device_cell_write() - Write cell to a given nvmem device
2050  * @info: nvmem cell info to be written.
2051  * @buf: buffer to be written to cell.
2058 	struct nvmem_cell_entry cell;  in nvmem_device_cell_write()  local
2064 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
2068 	return __nvmem_cell_entry_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
2102  * nvmem_device_write() - Write cell to a given nvmem device
2131  * nvmem_add_cell_table() - register a table of cell info entries
2133  * @table: table of cell info entries
2144  * nvmem_del_cell_table() - remove a previously registered cell info table
2146  * @table: table of cell info entries
2157  * nvmem_add_cell_lookups() - register a list of cell lookup entries
2159  * @entries: array of cell lookup entries
2160  * @nentries: number of cell lookup entries in the array
2174  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2177  * @entries: array of cell lookup entries
2178  * @nentries: number of cell lookup entries in the array