339 static void nvmem_cell_drop(struct nvmem_cell *cell)  in nvmem_cell_drop()  argument
341 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_REMOVE, cell);  in nvmem_cell_drop()
343 	list_del(&cell->node);  in nvmem_cell_drop()
345 	of_node_put(cell->np);  in nvmem_cell_drop()
346 	kfree_const(cell->name);  in nvmem_cell_drop()
347 	kfree(cell);  in nvmem_cell_drop()
352 	struct nvmem_cell *cell, *p;  in nvmem_device_remove_all_cells()  local
354 	list_for_each_entry_safe(cell, p, &nvmem->cells, node)  in nvmem_device_remove_all_cells()
355 		nvmem_cell_drop(cell);  in nvmem_device_remove_all_cells()
358 static void nvmem_cell_add(struct nvmem_cell *cell)  in nvmem_cell_add()  argument
361 	list_add_tail(&cell->node, &cell->nvmem->cells);  in nvmem_cell_add()
363 	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_ADD, cell);  in nvmem_cell_add()
368 					struct nvmem_cell *cell)  in nvmem_cell_info_to_nvmem_cell_nodup()  argument
370 	cell->nvmem = nvmem;  in nvmem_cell_info_to_nvmem_cell_nodup()
371 	cell->offset = info->offset;  in nvmem_cell_info_to_nvmem_cell_nodup()
372 	cell->bytes = info->bytes;  in nvmem_cell_info_to_nvmem_cell_nodup()
373 	cell->name = info->name;  in nvmem_cell_info_to_nvmem_cell_nodup()
375 	cell->bit_offset = info->bit_offset;  in nvmem_cell_info_to_nvmem_cell_nodup()
376 	cell->nbits = info->nbits;  in nvmem_cell_info_to_nvmem_cell_nodup()
378 	if (cell->nbits)  in nvmem_cell_info_to_nvmem_cell_nodup()
379 		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,  in nvmem_cell_info_to_nvmem_cell_nodup()
382 	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_cell_info_to_nvmem_cell_nodup()
384 			"cell %s unaligned to nvmem stride %d\n",  in nvmem_cell_info_to_nvmem_cell_nodup()
385 			cell->name ?: "<unknown>", nvmem->stride);  in nvmem_cell_info_to_nvmem_cell_nodup()
394 				struct nvmem_cell *cell)  in nvmem_cell_info_to_nvmem_cell()  argument
398 	err = nvmem_cell_info_to_nvmem_cell_nodup(nvmem, info, cell);  in nvmem_cell_info_to_nvmem_cell()
402 	cell->name = kstrdup_const(info->name, GFP_KERNEL);  in nvmem_cell_info_to_nvmem_cell()
403 	if (!cell->name)  in nvmem_cell_info_to_nvmem_cell()
410  * nvmem_add_cells() - Add cell information to an nvmem device
413  * @info: nvmem cell info to add to the device
488 	struct nvmem_cell *cell;  in nvmem_add_cells_from_table()  local
497 				cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_table()
498 				if (!cell) {  in nvmem_add_cells_from_table()
505 								     cell);  in nvmem_add_cells_from_table()
507 					kfree(cell);  in nvmem_add_cells_from_table()
511 				nvmem_cell_add(cell);  in nvmem_add_cells_from_table()
524 	struct nvmem_cell *iter, *cell = NULL;  in nvmem_find_cell_by_name()  local
529 			cell = iter;  in nvmem_find_cell_by_name()
535 	return cell;  in nvmem_find_cell_by_name()
542 	struct nvmem_cell *cell;  in nvmem_add_cells_from_of()  local
558 		cell = kzalloc(sizeof(*cell), GFP_KERNEL);  in nvmem_add_cells_from_of()
559 		if (!cell) {  in nvmem_add_cells_from_of()
564 		cell->nvmem = nvmem;  in nvmem_add_cells_from_of()
565 		cell->offset = be32_to_cpup(addr++);  in nvmem_add_cells_from_of()
566 		cell->bytes = be32_to_cpup(addr);  in nvmem_add_cells_from_of()
567 		cell->name = kasprintf(GFP_KERNEL, "%pOFn", child);  in nvmem_add_cells_from_of()
571 			cell->bit_offset = be32_to_cpup(addr++);  in nvmem_add_cells_from_of()
572 			cell->nbits = be32_to_cpup(addr);  in nvmem_add_cells_from_of()
575 		if (cell->nbits)  in nvmem_add_cells_from_of()
576 			cell->bytes = DIV_ROUND_UP(  in nvmem_add_cells_from_of()
577 					cell->nbits + cell->bit_offset,  in nvmem_add_cells_from_of()
580 		if (!IS_ALIGNED(cell->offset, nvmem->stride)) {  in nvmem_add_cells_from_of()
581 			dev_err(dev, "cell %s unaligned to nvmem stride %d\n",  in nvmem_add_cells_from_of()
582 				cell->name, nvmem->stride);  in nvmem_add_cells_from_of()
584 			kfree_const(cell->name);  in nvmem_add_cells_from_of()
585 			kfree(cell);  in nvmem_add_cells_from_of()
590 		cell->np = of_node_get(child);  in nvmem_add_cells_from_of()
591 		nvmem_cell_add(cell);  in nvmem_add_cells_from_of()
828 			"could not increase module refcount for cell %s\n",  in __nvmem_device_get()
964  * devm_nvmem_device_get() - Get nvmem cell of device form a given id
996 	struct nvmem_cell *cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()  local
1016 				cell = ERR_CAST(nvmem);  in nvmem_cell_get_from_lookup()
1020 			cell = nvmem_find_cell_by_name(nvmem,  in nvmem_cell_get_from_lookup()
1022 			if (!cell) {  in nvmem_cell_get_from_lookup()
1024 				cell = ERR_PTR(-ENOENT);  in nvmem_cell_get_from_lookup()
1031 	return cell;  in nvmem_cell_get_from_lookup()
1038 	struct nvmem_cell *iter, *cell = NULL;  in nvmem_find_cell_by_node()  local
1043 			cell = iter;  in nvmem_find_cell_by_node()
1049 	return cell;  in nvmem_find_cell_by_node()
1053  * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1055  * @np: Device tree node that uses the nvmem cell.
1056  * @id: nvmem cell name from nvmem-cell-names property, or NULL
1057  *      for the cell at index 0 (the lone cell with no accompanying
1058  *      nvmem-cell-names property).
1068 	struct nvmem_cell *cell;  in of_nvmem_cell_get()  local
1071 	/* if cell name exists, find index to the name */  in of_nvmem_cell_get()
1073 		index = of_property_match_string(np, "nvmem-cell-names", id);  in of_nvmem_cell_get()
1088 	cell = nvmem_find_cell_by_node(nvmem, cell_np);  in of_nvmem_cell_get()
1089 	if (!cell) {  in of_nvmem_cell_get()
1094 	return cell;  in of_nvmem_cell_get()
1100  * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1102  * @dev: Device that requests the nvmem cell.
1103  * @id: nvmem cell name to get (this corresponds with the name from the
1104  *      nvmem-cell-names property for DT systems and with the con_id from
1113 	struct nvmem_cell *cell;  in nvmem_cell_get()  local
1116 		cell = of_nvmem_cell_get(dev->of_node, id);  in nvmem_cell_get()
1117 		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)  in nvmem_cell_get()
1118 			return cell;  in nvmem_cell_get()
1121 	/* NULL cell id only allowed for device tree; invalid otherwise */  in nvmem_cell_get()
1135  * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1137  * @dev: Device that requests the nvmem cell.
1138  * @id: nvmem cell name id to get.
1146 	struct nvmem_cell **ptr, *cell;  in devm_nvmem_cell_get()  local
1152 	cell = nvmem_cell_get(dev, id);  in devm_nvmem_cell_get()
1153 	if (!IS_ERR(cell)) {  in devm_nvmem_cell_get()
1154 		*ptr = cell;  in devm_nvmem_cell_get()
1160 	return cell;  in devm_nvmem_cell_get()
1175  * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1178  * @dev: Device that requests the nvmem cell.
1179  * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1181 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)  in devm_nvmem_cell_put()  argument
1186 				devm_nvmem_cell_match, cell);  in devm_nvmem_cell_put()
1193  * nvmem_cell_put() - Release previously allocated nvmem cell.
1195  * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1197 void nvmem_cell_put(struct nvmem_cell *cell)  in nvmem_cell_put()  argument
1199 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_put()
1205 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell *cell, void *buf)  in nvmem_shift_read_buffer_in_place()  argument
1208 	int i, extra, bit_offset = cell->bit_offset;  in nvmem_shift_read_buffer_in_place()
1216 		for (i = 1; i < cell->bytes; i++) {  in nvmem_shift_read_buffer_in_place()
1225 		p += cell->bytes - 1;  in nvmem_shift_read_buffer_in_place()
1229 	extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE);  in nvmem_shift_read_buffer_in_place()
1234 	if (cell->nbits % BITS_PER_BYTE)  in nvmem_shift_read_buffer_in_place()
1235 		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);  in nvmem_shift_read_buffer_in_place()
1239 		      struct nvmem_cell *cell,  in __nvmem_cell_read()  argument
1244 	rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->bytes);  in __nvmem_cell_read()
1250 	if (cell->bit_offset || cell->nbits)  in __nvmem_cell_read()
1251 		nvmem_shift_read_buffer_in_place(cell, buf);  in __nvmem_cell_read()
1254 		*len = cell->bytes;  in __nvmem_cell_read()
1260  * nvmem_cell_read() - Read a given nvmem cell
1262  * @cell: nvmem cell to be read.
1263  * @len: pointer to length of cell which will be populated on successful read;
1269 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)  in nvmem_cell_read()  argument
1271 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_read()
1278 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_read()
1282 	rc = __nvmem_cell_read(nvmem, cell, buf, len);  in nvmem_cell_read()
1292 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell *cell,  in nvmem_cell_prepare_write_buffer()  argument
1295 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_prepare_write_buffer()
1296 	int i, rc, nbits, bit_offset = cell->bit_offset;  in nvmem_cell_prepare_write_buffer()
1299 	nbits = cell->nbits;  in nvmem_cell_prepare_write_buffer()
1300 	buf = kzalloc(cell->bytes, GFP_KERNEL);  in nvmem_cell_prepare_write_buffer()
1312 		rc = nvmem_reg_read(nvmem, cell->offset, &v, 1);  in nvmem_cell_prepare_write_buffer()
1318 		for (i = 1; i < cell->bytes; i++) {  in nvmem_cell_prepare_write_buffer()
1332 				    cell->offset + cell->bytes - 1, &v, 1);  in nvmem_cell_prepare_write_buffer()
1346  * nvmem_cell_write() - Write to a given nvmem cell
1348  * @cell: nvmem cell to be written.
1350  * @len: length of buffer to be written to nvmem cell.
1354 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)  in nvmem_cell_write()  argument
1356 	struct nvmem_device *nvmem = cell->nvmem;  in nvmem_cell_write()
1360 	    (cell->bit_offset == 0 && len != cell->bytes))  in nvmem_cell_write()
1363 	if (cell->bit_offset || cell->nbits) {  in nvmem_cell_write()
1364 		buf = nvmem_cell_prepare_write_buffer(cell, buf, len);  in nvmem_cell_write()
1369 	rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes);  in nvmem_cell_write()
1372 	if (cell->bit_offset || cell->nbits)  in nvmem_cell_write()
1385 	struct nvmem_cell *cell;  in nvmem_cell_read_common()  local
1389 	cell = nvmem_cell_get(dev, cell_id);  in nvmem_cell_read_common()
1390 	if (IS_ERR(cell))  in nvmem_cell_read_common()
1391 		return PTR_ERR(cell);  in nvmem_cell_read_common()
1393 	buf = nvmem_cell_read(cell, &len);  in nvmem_cell_read_common()
1395 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1400 		nvmem_cell_put(cell);  in nvmem_cell_read_common()
1405 	nvmem_cell_put(cell);  in nvmem_cell_read_common()
1411  * nvmem_cell_read_u8() - Read a cell value as a u8
1413  * @dev: Device that requests the nvmem cell.
1414  * @cell_id: Name of nvmem cell to read.
1426  * nvmem_cell_read_u16() - Read a cell value as a u16
1428  * @dev: Device that requests the nvmem cell.
1429  * @cell_id: Name of nvmem cell to read.
1441  * nvmem_cell_read_u32() - Read a cell value as a u32
1443  * @dev: Device that requests the nvmem cell.
1444  * @cell_id: Name of nvmem cell to read.
1456  * nvmem_cell_read_u64() - Read a cell value as a u64
1458  * @dev: Device that requests the nvmem cell.
1459  * @cell_id: Name of nvmem cell to read.
1471  * nvmem_device_cell_read() - Read a given nvmem device and cell
1474  * @info: nvmem cell info to be read.
1483 	struct nvmem_cell cell;  in nvmem_device_cell_read()  local
1490 	rc = nvmem_cell_info_to_nvmem_cell_nodup(nvmem, info, &cell);  in nvmem_device_cell_read()
1494 	rc = __nvmem_cell_read(nvmem, &cell, buf, &len);  in nvmem_device_cell_read()
1503  * nvmem_device_cell_write() - Write cell to a given nvmem device
1506  * @info: nvmem cell info to be written.
1507  * @buf: buffer to be written to cell.
1514 	struct nvmem_cell cell;  in nvmem_device_cell_write()  local
1520 	rc = nvmem_cell_info_to_nvmem_cell_nodup(nvmem, info, &cell);  in nvmem_device_cell_write()
1524 	return nvmem_cell_write(&cell, buf, cell.bytes);  in nvmem_device_cell_write()
1558  * nvmem_device_write() - Write cell to a given nvmem device
1587  * nvmem_add_cell_table() - register a table of cell info entries
1589  * @table: table of cell info entries
1600  * nvmem_del_cell_table() - remove a previously registered cell info table
1602  * @table: table of cell info entries
1613  * nvmem_add_cell_lookups() - register a list of cell lookup entries
1615  * @entries: array of cell lookup entries
1616  * @nentries: number of cell lookup entries in the array
1630  * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
1633  * @entries: array of cell lookup entries
1634  * @nentries: number of cell lookup entries in the array