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()
463 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
465 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
466 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
475 					       struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry()  argument
479 	err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell_entry()
483 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell_entry()
484 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell_entry()
491  * nvmem_add_one_cell() - Add one cell information to an nvmem device
494  * @info: nvmem cell info to add to the device
501 	struct nvmem_cell_entry *cell;  in nvmem_add_one_cell()  local
504 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_one_cell()
505 	if (!cell)  in nvmem_add_one_cell()
508 	rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_one_cell()
510 		kfree(cell);  in nvmem_add_one_cell()
514 	nvmem_cell_entry_add(cell);  in nvmem_add_one_cell()
521  * nvmem_add_cells() - Add cell information to an nvmem device
524  * @info: nvmem cell info to add to the device
574 	struct nvmem_cell_entry *cell;  in nvmem_add_cells_from_table()  local
583 				cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_table()
584 				if (!cell) {  in nvmem_add_cells_from_table()
589 				rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_cells_from_table()
591 					kfree(cell);  in nvmem_add_cells_from_table()
595 				nvmem_cell_entry_add(cell);  in nvmem_add_cells_from_table()
608 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_name()  local
613 			cell = iter;  in nvmem_find_cell_entry_by_name()
619 	return cell;  in nvmem_find_cell_entry_by_name()
1098 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
1266 	struct nvmem_cell *cell;  in nvmem_create_cell()  local
1269 	cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_create_cell()
1270 	if (!cell)  in nvmem_create_cell()
1276 			kfree(cell);  in nvmem_create_cell()
1281 	cell->id = name;  in nvmem_create_cell()
1282 	cell->entry = entry;  in nvmem_create_cell()
1283 	cell->index = index;  in nvmem_create_cell()
1285 	return cell;  in nvmem_create_cell()
1292 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1312 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1320 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1322 				cell = nvmem_create_cell(cell_entry, con_id, 0);  in nvmem_cell_get_from_lookup()
1323 				if (IS_ERR(cell))  in nvmem_cell_get_from_lookup()
1331 	return cell;  in nvmem_cell_get_from_lookup()
1338 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_node()  local
1343 			cell = iter;  in nvmem_find_cell_entry_by_node()
1349 	return cell;  in nvmem_find_cell_entry_by_node()
1353  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1355  * @np: Device tree node that uses the nvmem cell.
1356  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1357  *      for the cell at index 0 (the lone cell with no accompanying
1358  *      nvmem-cell-names property).
1369 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1375 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1377 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1380 						  "#nvmem-cell-cells",  in of_nvmem_cell_get()
1421 	cell = nvmem_create_cell(cell_entry, id, cell_index);  in of_nvmem_cell_get()
1422 	if (IS_ERR(cell))  in of_nvmem_cell_get()
1425 	return cell;  in of_nvmem_cell_get()
1431  * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1433  * @dev: Device that requests the nvmem cell.
1434  * @id: nvmem cell name to get (this corresponds with the name from the
1435  *      nvmem-cell-names property for DT systems and with the con_id from
1444 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1447 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1448 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1449 			return cell;  in nvmem_cell_get()
1452 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1466  * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1468  * @dev: Device that requests the nvmem cell.
1469  * @id: nvmem cell name id to get.
1477 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1483 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1484 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1485 		*ptr = cell;  in devm_nvmem_cell_get()
1491 	return cell;  in devm_nvmem_cell_get()
1506  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1509  * @dev: Device that requests the nvmem cell.
1510  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1512 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1517 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1524  * nvmem_cell_put() - Release previously allocated nvmem cell.
1526  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1528 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1530 	struct nvmem_device *nvmem = cell->entry->nvmem;  in nvmem_cell_put()
1532 	if (cell->id)  in nvmem_cell_put()
1533 		kfree_const(cell->id);  in nvmem_cell_put()
1535 	kfree(cell);  in nvmem_cell_put()
1540 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1543 	int i, extra, bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1551 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1560 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1564 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1569 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1570 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1574 			     struct nvmem_cell_entry *cell,  in __nvmem_cell_read()  argument
1579 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1585 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1586 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1588 	if (cell->read_post_process) {  in __nvmem_cell_read()
1589 		rc = cell->read_post_process(cell->priv, id, index,  in __nvmem_cell_read()
1590 					     cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1596 		*len = cell->bytes;  in __nvmem_cell_read()
1602  * nvmem_cell_read() - Read a given nvmem cell
1604  * @cell: nvmem cell to be read.
1605  * @len: pointer to length of cell which will be populated on successful read;
1611 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1613 	struct nvmem_cell_entry *entry = cell->entry;  in nvmem_cell_read()
1625 	rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index);  in nvmem_cell_read()
1635 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell,  in nvmem_cell_prepare_write_buffer()  argument
1638 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1639 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1642 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1643 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1655 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1661 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1675 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1688 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len)  in __nvmem_cell_entry_write()  argument
1690 	struct nvmem_device *nvmem = cell->nvmem;  in __nvmem_cell_entry_write()
1694 	    (cell->bit_offset == 0 && len != cell->bytes))  in __nvmem_cell_entry_write()
1702 	if (cell->read_post_process)  in __nvmem_cell_entry_write()
1705 	if (cell->bit_offset || cell->nbits) {  in __nvmem_cell_entry_write()
1706 		if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes)  in __nvmem_cell_entry_write()
1708 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in __nvmem_cell_entry_write()
1713 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_entry_write()
1716 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_entry_write()
1726  * nvmem_cell_write() - Write to a given nvmem cell
1728  * @cell: nvmem cell to be written.
1730  * @len: length of buffer to be written to nvmem cell.
1734 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1736 	return __nvmem_cell_entry_write(cell->entry, buf, len);  in nvmem_cell_write()
1744 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1748 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1749 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1750 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1752 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1754 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1759 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1764 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1770  * nvmem_cell_read_u8() - Read a cell value as a u8
1772  * @dev: Device that requests the nvmem cell.
1773  * @cell_id: Name of nvmem cell to read.
1785  * nvmem_cell_read_u16() - Read a cell value as a u16
1787  * @dev: Device that requests the nvmem cell.
1788  * @cell_id: Name of nvmem cell to read.
1800  * nvmem_cell_read_u32() - Read a cell value as a u32
1802  * @dev: Device that requests the nvmem cell.
1803  * @cell_id: Name of nvmem cell to read.
1815  * nvmem_cell_read_u64() - Read a cell value as a u64
1817  * @dev: Device that requests the nvmem cell.
1818  * @cell_id: Name of nvmem cell to read.
1833 	struct nvmem_cell *cell;  in nvmem_cell_read_variable_common()  local
1837 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_variable_common()
1838 	if (IS_ERR(cell))  in nvmem_cell_read_variable_common()
1839 		return cell;  in nvmem_cell_read_variable_common()
1841 	nbits = cell->entry->nbits;  in nvmem_cell_read_variable_common()
1842 	buf = nvmem_cell_read(cell, len);  in nvmem_cell_read_variable_common()
1843 	nvmem_cell_put(cell);  in nvmem_cell_read_variable_common()
1865  * @dev: Device that requests the nvmem cell.
1866  * @cell_id: Name of nvmem cell to read.
1896  * @dev: Device that requests the nvmem cell.
1897  * @cell_id: Name of nvmem cell to read.
1925  * nvmem_device_cell_read() - Read a given nvmem device and cell
1928  * @info: nvmem cell info to be read.
1937 	struct nvmem_cell_entry cell;  in nvmem_device_cell_read()  local
1944 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
1948 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0);  in nvmem_device_cell_read()
1957  * nvmem_device_cell_write() - Write cell to a given nvmem device
1960  * @info: nvmem cell info to be written.
1961  * @buf: buffer to be written to cell.
1968 	struct nvmem_cell_entry cell;  in nvmem_device_cell_write()  local
1974 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
1978 	return __nvmem_cell_entry_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
2012  * nvmem_device_write() - Write cell to a given nvmem device
2041  * nvmem_add_cell_table() - register a table of cell info entries
2043  * @table: table of cell info entries
2054  * nvmem_del_cell_table() - remove a previously registered cell info table
2056  * @table: table of cell info entries
2067  * nvmem_add_cell_lookups() - register a list of cell lookup entries
2069  * @entries: array of cell lookup entries
2070  * @nentries: number of cell lookup entries in the array
2084  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2087  * @entries: array of cell lookup entries
2088  * @nentries: number of cell lookup entries in the array