344 	struct nvmem_cell *cell = NULL;  in nvmem_cell_attr_read()  local
349 	cell = nvmem_create_cell(entry, entry->name, 0);  in nvmem_cell_attr_read()
350 	if (IS_ERR(cell))  in nvmem_cell_attr_read()
351 		return PTR_ERR(cell);  in nvmem_cell_attr_read()
353 	if (!cell)  in nvmem_cell_attr_read()
356 	content = nvmem_cell_read(cell, &cell_sz);  in nvmem_cell_attr_read()
367 	kfree_const(cell->id);  in nvmem_cell_attr_read()
368 	kfree(cell);  in nvmem_cell_attr_read()
486 	/* Initialize each attribute to take the name and size of the cell */  in nvmem_populate_sysfs_cells()
551 static void nvmem_cell_entry_drop(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_drop()  argument
553 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_REMOVE, cell);  in nvmem_cell_entry_drop()
555 	list_del(&cell->node);  in nvmem_cell_entry_drop()
557 	of_node_put(cell->np);  in nvmem_cell_entry_drop()
558 	kfree_const(cell->name);  in nvmem_cell_entry_drop()
559 	kfree(cell);  in nvmem_cell_entry_drop()
564 	struct nvmem_cell_entry *cell, *p;  in nvmem_device_remove_all_cells()  local
566 	list_for_each_entry_safe(cell, p, &nvmem->cells, node)  in nvmem_device_remove_all_cells()
567 		nvmem_cell_entry_drop(cell);  in nvmem_device_remove_all_cells()
570 static void nvmem_cell_entry_add(struct nvmem_cell_entry *cell)  in nvmem_cell_entry_add()  argument
573 	list_add_tail(&cell->node, &cell->nvmem->cells);  in nvmem_cell_entry_add()
575 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_ADD, cell);  in nvmem_cell_entry_add()
580 						     struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry_nodup()  argument
582 	cell->nvmem = nvmem;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
583 	cell->offset = info->offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
584 	cell->raw_len = info->raw_len ?: info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
585 	cell->bytes = info->bytes;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
586 	cell->name = info->name;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
587 	cell->read_post_process = info->read_post_process;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
588 	cell->priv = info->priv;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
590 	cell->bit_offset = info->bit_offset;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
591 	cell->nbits = info->nbits;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
592 	cell->np = info->np;  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
594 	if (cell->nbits) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
595 		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
597 		cell->raw_len = ALIGN(cell->bytes, nvmem->word_size);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
600 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
602 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
603 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
607 	if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) {  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
609 			"cell %s raw len %zd unaligned to nvmem word size %d\n",  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
610 			cell->name ?: "<unknown>", cell->raw_len,  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
616 		cell->raw_len = ALIGN(cell->raw_len, nvmem->word_size);  in nvmem_cell_info_to_nvmem_cell_entry_nodup()
624 					       struct nvmem_cell_entry *cell)  in nvmem_cell_info_to_nvmem_cell_entry()  argument
628 	err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell_entry()
632 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell_entry()
633 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell_entry()
640  * nvmem_add_one_cell() - Add one cell information to an nvmem device
643  * @info: nvmem cell info to add to the device
650 	struct nvmem_cell_entry *cell;  in nvmem_add_one_cell()  local
653 	cell = kzalloc_obj(*cell);  in nvmem_add_one_cell()
654 	if (!cell)  in nvmem_add_one_cell()
657 	rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);  in nvmem_add_one_cell()
659 		kfree(cell);  in nvmem_add_one_cell()
663 	nvmem_cell_entry_add(cell);  in nvmem_add_one_cell()
670  * nvmem_add_cells() - Add cell information to an nvmem device
673  * @info: nvmem cell info to add to the device
722 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_name()  local
727 			cell = iter;  in nvmem_find_cell_entry_by_name()
733 	return cell;  in nvmem_find_cell_entry_by_name()
1127 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
1295 	struct nvmem_cell *cell;  in nvmem_create_cell()  local
1298 	cell = kzalloc_obj(*cell);  in nvmem_create_cell()
1299 	if (!cell)  in nvmem_create_cell()
1305 			kfree(cell);  in nvmem_create_cell()
1310 	cell->id = name;  in nvmem_create_cell()
1311 	cell->entry = entry;  in nvmem_create_cell()
1312 	cell->index = index;  in nvmem_create_cell()
1314 	return cell;  in nvmem_create_cell()
1321 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1341 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1349 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1351 				cell = nvmem_create_cell(cell_entry, con_id, 0);  in nvmem_cell_get_from_lookup()
1352 				if (IS_ERR(cell))  in nvmem_cell_get_from_lookup()
1360 	return cell;  in nvmem_cell_get_from_lookup()
1373 	struct nvmem_cell_entry *iter, *cell = NULL;  in nvmem_find_cell_entry_by_node()  local
1378 			cell = iter;  in nvmem_find_cell_entry_by_node()
1384 	return cell;  in nvmem_find_cell_entry_by_node()
1400  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1402  * @np: Device tree node that uses the nvmem cell.
1403  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1404  *      for the cell at index 0 (the lone cell with no accompanying
1405  *      nvmem-cell-names property).
1416 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1422 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1424 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1427 						  "#nvmem-cell-cells",  in of_nvmem_cell_get()
1479 	cell = nvmem_create_cell(cell_entry, id, cell_index);  in of_nvmem_cell_get()
1480 	if (IS_ERR(cell)) {  in of_nvmem_cell_get()
1485 	return cell;  in of_nvmem_cell_get()
1491  * nvmem_cell_get() - Get nvmem cell of device from a given cell name
1493  * @dev: Device that requests the nvmem cell.
1494  * @id: nvmem cell name to get (this corresponds with the name from the
1495  *      nvmem-cell-names property for DT systems and with the con_id from
1504 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1507 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1508 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1509 			return cell;  in nvmem_cell_get()
1512 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1526  * devm_nvmem_cell_get() - Get nvmem cell of device from a given id
1528  * @dev: Device that requests the nvmem cell.
1529  * @id: nvmem cell name id to get.
1537 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1543 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1544 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1545 		*ptr = cell;  in devm_nvmem_cell_get()
1551 	return cell;  in devm_nvmem_cell_get()
1566  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1569  * @dev: Device that requests the nvmem cell.
1570  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1572 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1577 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1584  * nvmem_cell_put() - Release previously allocated nvmem cell.
1586  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1588 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1590 	struct nvmem_device *nvmem = cell->entry->nvmem;  in nvmem_cell_put()
1592 	if (cell->id)  in nvmem_cell_put()
1593 		kfree_const(cell->id);  in nvmem_cell_put()
1595 	kfree(cell);  in nvmem_cell_put()
1601 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1605 	int bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1618 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1625 		memmove(p, b, cell->bytes - bytes_offset);  in nvmem_shift_read_buffer_in_place()
1626 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1629 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1633 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1638 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1639 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1643 			     struct nvmem_cell_entry *cell,  in __nvmem_cell_read()  argument
1648 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1654 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1655 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1657 	if (cell->read_post_process) {  in __nvmem_cell_read()
1658 		rc = cell->read_post_process(cell->priv, id, index,  in __nvmem_cell_read()
1659 					     cell->offset, buf, cell->raw_len);  in __nvmem_cell_read()
1665 		*len = cell->bytes;  in __nvmem_cell_read()
1671  * nvmem_cell_read() - Read a given nvmem cell
1673  * @cell: nvmem cell to be read.
1674  * @len: pointer to length of cell which will be populated on successful read;
1680 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1682 	struct nvmem_cell_entry *entry = cell->entry;  in nvmem_cell_read()
1694 	rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index);  in nvmem_cell_read()
1704 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell,  in nvmem_cell_prepare_write_buffer()  argument
1707 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1708 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1711 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1712 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1724 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1730 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1744 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1757 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len)  in __nvmem_cell_entry_write()  argument
1759 	struct nvmem_device *nvmem = cell->nvmem;  in __nvmem_cell_entry_write()
1763 	    (cell->bit_offset == 0 && len != cell->bytes))  in __nvmem_cell_entry_write()
1771 	if (cell->read_post_process)  in __nvmem_cell_entry_write()
1774 	if (cell->bit_offset || cell->nbits) {  in __nvmem_cell_entry_write()
1775 		if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes)  in __nvmem_cell_entry_write()
1777 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in __nvmem_cell_entry_write()
1782 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_entry_write()
1785 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_entry_write()
1795  * nvmem_cell_write() - Write to a given nvmem cell
1797  * @cell: nvmem cell to be written.
1799  * @len: length of buffer to be written to nvmem cell.
1803 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1805 	return __nvmem_cell_entry_write(cell->entry, buf, len);  in nvmem_cell_write()
1813 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1817 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1818 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1819 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1821 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1823 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1828 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1833 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1839  * nvmem_cell_read_u8() - Read a cell value as a u8
1841  * @dev: Device that requests the nvmem cell.
1842  * @cell_id: Name of nvmem cell to read.
1854  * nvmem_cell_read_u16() - Read a cell value as a u16
1856  * @dev: Device that requests the nvmem cell.
1857  * @cell_id: Name of nvmem cell to read.
1869  * nvmem_cell_read_u32() - Read a cell value as a u32
1871  * @dev: Device that requests the nvmem cell.
1872  * @cell_id: Name of nvmem cell to read.
1884  * nvmem_cell_read_u64() - Read a cell value as a u64
1886  * @dev: Device that requests the nvmem cell.
1887  * @cell_id: Name of nvmem cell to read.
1902 	struct nvmem_cell *cell;  in nvmem_cell_read_variable_common()  local
1906 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_variable_common()
1907 	if (IS_ERR(cell))  in nvmem_cell_read_variable_common()
1908 		return cell;  in nvmem_cell_read_variable_common()
1910 	nbits = cell->entry->nbits;  in nvmem_cell_read_variable_common()
1911 	buf = nvmem_cell_read(cell, len);  in nvmem_cell_read_variable_common()
1912 	nvmem_cell_put(cell);  in nvmem_cell_read_variable_common()
1934  * @dev: Device that requests the nvmem cell.
1935  * @cell_id: Name of nvmem cell to read.
1965  * @dev: Device that requests the nvmem cell.
1966  * @cell_id: Name of nvmem cell to read.
1994  * nvmem_device_cell_read() - Read a given nvmem device and cell
1997  * @info: nvmem cell info to be read.
2006 	struct nvmem_cell_entry cell;  in nvmem_device_cell_read()  local
2013 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
2017 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0);  in nvmem_device_cell_read()
2026  * nvmem_device_cell_write() - Write cell to a given nvmem device
2029  * @info: nvmem cell info to be written.
2030  * @buf: buffer to be written to cell.
2037 	struct nvmem_cell_entry cell;  in nvmem_device_cell_write()  local
2043 	rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
2047 	return __nvmem_cell_entry_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
2081  * nvmem_device_write() - Write cell to a given nvmem device
2110  * nvmem_add_cell_lookups() - register a list of cell lookup entries
2112  * @entries: array of cell lookup entries
2113  * @nentries: number of cell lookup entries in the array
2127  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2130  * @entries: array of cell lookup entries
2131  * @nentries: number of cell lookup entries in the array