416 static void nvmem_cell_entry_drop(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_drop()  argument
418 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_REMOVE, cell);  in nvmem_cell_entry_drop()
420 	list_del(&cell->node);  in nvmem_cell_entry_drop()
422 	of_node_put(cell->np);  in nvmem_cell_entry_drop()
423 	kfree_const(cell->name);  in nvmem_cell_entry_drop()
424 	kfree(cell);  in nvmem_cell_entry_drop()
429 	struct nvmem_cell_entry *cell, *p;  in nvmem_device_remove_all_cells()  local
431 	list_for_each_entry_safe(cell, p, &nvmem->cells, node)  in nvmem_device_remove_all_cells()
432 		nvmem_cell_entry_drop(cell);  in nvmem_device_remove_all_cells()
435 static void nvmem_cell_entry_add(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_add()  argument
438 	list_add_tail(&cell->node, &cell->nvmem->cells);  in nvmem_cell_entry_add()
440 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_ADD, cell);  in nvmem_cell_entry_add()
445 						     struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry_nodup()  argument
447 	cell->nvmem = nvmem;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
448 	cell->offset = info->offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
449 	cell->raw_len = info->raw_len ?: info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
450 	cell->bytes = info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
451 	cell->name = info->name;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
452 	cell->read_post_process = info->read_post_process;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
453 	cell->priv = info->priv;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
455 	cell->bit_offset = info->bit_offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
456 	cell->nbits = info->nbits;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
457 	cell->np = info->np;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
459 	if (cell->nbits) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
460 		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
462 		cell->raw_len = ALIGN(cell->bytes, nvmem->word_size);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
465 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
467 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
468 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
472 	if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
474 			"cell %s raw len %zd unaligned to nvmem word size %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
475 			cell->name ?: "<unknown>", cell->raw_len,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
481 		cell->raw_len = ALIGN(cell->raw_len, nvmem->word_size);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
489 					       struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry()  argument
493 	err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell_entry()
497 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell_entry()
498 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell_entry()
505  * nvmem_add_one_cell() - Add one cell information to an nvmem device
508  * @info: nvmem cell info to add to the device
515 	struct nvmem_cell_entry *cell;  in nvmem_add_one_cell()  local
518 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_one_cell()
519 	if (!cell)  in nvmem_add_one_cell()
522 	rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_one_cell()
524 		kfree(cell);  in nvmem_add_one_cell()
528 	nvmem_cell_entry_add(cell);  in nvmem_add_one_cell()
535  * nvmem_add_cells() - Add cell information to an nvmem device
538  * @info: nvmem cell info to add to the device
588 	struct nvmem_cell_entry *cell;  in nvmem_add_cells_from_table()  local
597 				cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_table()
598 				if (!cell) {  in nvmem_add_cells_from_table()
603 				rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_cells_from_table()
605 					kfree(cell);  in nvmem_add_cells_from_table()
609 				nvmem_cell_entry_add(cell);  in nvmem_add_cells_from_table()
622 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_name()  local
627 			cell = iter;  in nvmem_find_cell_entry_by_name()
633 	return cell;  in nvmem_find_cell_entry_by_name()
1112 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
1280 	struct nvmem_cell *cell;  in nvmem_create_cell()  local
1283 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_create_cell()
1284 	if (!cell)  in nvmem_create_cell()
1290 			kfree(cell);  in nvmem_create_cell()
1295 	cell->id = name;  in nvmem_create_cell()
1296 	cell->entry = entry;  in nvmem_create_cell()
1297 	cell->index = index;  in nvmem_create_cell()
1299 	return cell;  in nvmem_create_cell()
1306 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1326 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1334 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1336 				cell = nvmem_create_cell(cell_entry, con_id, 0);  in nvmem_cell_get_from_lookup()
1337 				if (IS_ERR(cell))  in nvmem_cell_get_from_lookup()
1345 	return cell;  in nvmem_cell_get_from_lookup()
1352 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_node()  local
1357 			cell = iter;  in nvmem_find_cell_entry_by_node()
1363 	return cell;  in nvmem_find_cell_entry_by_node()
1367  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1369  * @np: Device tree node that uses the nvmem cell.
1370  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1371  *      for the cell at index 0 (the lone cell with no accompanying
1372  *      nvmem-cell-names property).
1383 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1389 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1391 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1394 						  "#nvmem-cell-cells",  in of_nvmem_cell_get()
1435 	cell = nvmem_create_cell(cell_entry, id, cell_index);  in of_nvmem_cell_get()
1436 	if (IS_ERR(cell))  in of_nvmem_cell_get()
1439 	return cell;  in of_nvmem_cell_get()
1445  * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1447  * @dev: Device that requests the nvmem cell.
1448  * @id: nvmem cell name to get (this corresponds with the name from the
1449  *      nvmem-cell-names property for DT systems and with the con_id from
1458 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1461 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1462 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1463 			return cell;  in nvmem_cell_get()
1466 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1480  * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1482  * @dev: Device that requests the nvmem cell.
1483  * @id: nvmem cell name id to get.
1491 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1497 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1498 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1499 		*ptr = cell;  in devm_nvmem_cell_get()
1505 	return cell;  in devm_nvmem_cell_get()
1520  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1523  * @dev: Device that requests the nvmem cell.
1524  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1526 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1531 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1538  * nvmem_cell_put() - Release previously allocated nvmem cell.
1540  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1542 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1544 	struct nvmem_device *nvmem = cell->entry->nvmem;  in nvmem_cell_put()
1546 	if (cell->id)  in nvmem_cell_put()
1547 		kfree_const(cell->id);  in nvmem_cell_put()
1549 	kfree(cell);  in nvmem_cell_put()
1554 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1557 	int i, extra, bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1565 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1574 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1578 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1583 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1584 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1588 			     struct nvmem_cell_entry *cell,  in __nvmem_cell_read()  argument
1593 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1599 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1600 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1602 	if (cell->read_post_process) {  in __nvmem_cell_read()
1603 		rc = cell->read_post_process(cell->priv, id, index,  in __nvmem_cell_read()
1604 					     cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1610 		*len = cell->bytes;  in __nvmem_cell_read()
1616  * nvmem_cell_read() - Read a given nvmem cell
1618  * @cell: nvmem cell to be read.
1619  * @len: pointer to length of cell which will be populated on successful read;
1625 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1627 	struct nvmem_cell_entry *entry = cell->entry;  in nvmem_cell_read()
1639 	rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index);  in nvmem_cell_read()
1649 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell,  in nvmem_cell_prepare_write_buffer()  argument
1652 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1653 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1656 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1657 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1669 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1675 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1689 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1702 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len)  in __nvmem_cell_entry_write()  argument
1704 	struct nvmem_device *nvmem = cell->nvmem;  in __nvmem_cell_entry_write()
1708 	    (cell->bit_offset == 0 && len != cell->bytes))  in __nvmem_cell_entry_write()
1716 	if (cell->read_post_process)  in __nvmem_cell_entry_write()
1719 	if (cell->bit_offset || cell->nbits) {  in __nvmem_cell_entry_write()
1720 		if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes)  in __nvmem_cell_entry_write()
1722 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in __nvmem_cell_entry_write()
1727 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_entry_write()
1730 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_entry_write()
1740  * nvmem_cell_write() - Write to a given nvmem cell
1742  * @cell: nvmem cell to be written.
1744  * @len: length of buffer to be written to nvmem cell.
1748 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1750 	return __nvmem_cell_entry_write(cell->entry, buf, len);  in nvmem_cell_write()
1758 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1762 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1763 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1764 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1766 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1768 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1773 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1778 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1784  * nvmem_cell_read_u8() - Read a cell value as a u8
1786  * @dev: Device that requests the nvmem cell.
1787  * @cell_id: Name of nvmem cell to read.
1799  * nvmem_cell_read_u16() - Read a cell value as a u16
1801  * @dev: Device that requests the nvmem cell.
1802  * @cell_id: Name of nvmem cell to read.
1814  * nvmem_cell_read_u32() - Read a cell value as a u32
1816  * @dev: Device that requests the nvmem cell.
1817  * @cell_id: Name of nvmem cell to read.
1829  * nvmem_cell_read_u64() - Read a cell value as a u64
1831  * @dev: Device that requests the nvmem cell.
1832  * @cell_id: Name of nvmem cell to read.
1847 	struct nvmem_cell *cell;  in nvmem_cell_read_variable_common()  local
1851 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_variable_common()
1852 	if (IS_ERR(cell))  in nvmem_cell_read_variable_common()
1853 		return cell;  in nvmem_cell_read_variable_common()
1855 	nbits = cell->entry->nbits;  in nvmem_cell_read_variable_common()
1856 	buf = nvmem_cell_read(cell, len);  in nvmem_cell_read_variable_common()
1857 	nvmem_cell_put(cell);  in nvmem_cell_read_variable_common()
1879  * @dev: Device that requests the nvmem cell.
1880  * @cell_id: Name of nvmem cell to read.
1910  * @dev: Device that requests the nvmem cell.
1911  * @cell_id: Name of nvmem cell to read.
1939  * nvmem_device_cell_read() - Read a given nvmem device and cell
1942  * @info: nvmem cell info to be read.
1951 	struct nvmem_cell_entry cell;  in nvmem_device_cell_read()  local
1958 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
1962 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0);  in nvmem_device_cell_read()
1971  * nvmem_device_cell_write() - Write cell to a given nvmem device
1974  * @info: nvmem cell info to be written.
1975  * @buf: buffer to be written to cell.
1982 	struct nvmem_cell_entry cell;  in nvmem_device_cell_write()  local
1988 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
1992 	return __nvmem_cell_entry_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
2026  * nvmem_device_write() - Write cell to a given nvmem device
2055  * nvmem_add_cell_table() - register a table of cell info entries
2057  * @table: table of cell info entries
2068  * nvmem_del_cell_table() - remove a previously registered cell info table
2070  * @table: table of cell info entries
2081  * nvmem_add_cell_lookups() - register a list of cell lookup entries
2083  * @entries: array of cell lookup entries
2084  * @nentries: number of cell lookup entries in the array
2098  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2101  * @entries: array of cell lookup entries
2102  * @nentries: number of cell lookup entries in the array