Lines Matching +full:cell +full:- +full:index
1 // SPDX-License-Identifier: GPL-2.0
6 * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
16 #include <linux/nvmem-consumer.h>
17 #include <linux/nvmem-provider.h>
44 int index; member
58 if (nvmem->reg_read) in __nvmem_reg_read()
59 return nvmem->reg_read(nvmem->priv, offset, val, bytes); in __nvmem_reg_read()
61 return -EINVAL; in __nvmem_reg_read()
69 if (nvmem->reg_write) { in __nvmem_reg_write()
70 gpiod_set_value_cansleep(nvmem->wp_gpio, 0); in __nvmem_reg_write()
71 ret = nvmem->reg_write(nvmem->priv, offset, val, bytes); in __nvmem_reg_write()
72 gpiod_set_value_cansleep(nvmem->wp_gpio, 1); in __nvmem_reg_write()
76 return -EINVAL; in __nvmem_reg_write()
86 const struct nvmem_keepout *keepout = nvmem->keepout; in nvmem_access_with_keepouts()
87 const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; in nvmem_access_with_keepouts()
94 while ((keepout < keepoutend) && (keepout->end <= offset)) in nvmem_access_with_keepouts()
99 if (offset < keepout->start) { in nvmem_access_with_keepouts()
100 kend = min(end, keepout->start); in nvmem_access_with_keepouts()
101 ksize = kend - offset; in nvmem_access_with_keepouts()
118 kend = min(end, keepout->end); in nvmem_access_with_keepouts()
119 ksize = kend - offset; in nvmem_access_with_keepouts()
121 memset(val, keepout->value, ksize); in nvmem_access_with_keepouts()
133 ksize = end - offset; in nvmem_access_with_keepouts()
146 if (!nvmem->nkeepout) in nvmem_reg_read()
155 if (!nvmem->nkeepout) in nvmem_reg_write()
179 return sysfs_emit(buf, "%s\n", nvmem_type_str[nvmem->type]); in type_show()
189 return sysfs_emit(buf, "%d\n", nvmem->read_only); in force_ro_show()
196 int ret = kstrtobool(buf, &nvmem->read_only); in force_ro_store()
220 if (attr->private) in bin_attr_nvmem_read()
221 dev = attr->private; in bin_attr_nvmem_read()
226 if (!IS_ALIGNED(pos, nvmem->stride)) in bin_attr_nvmem_read()
227 return -EINVAL; in bin_attr_nvmem_read()
229 if (count < nvmem->word_size) in bin_attr_nvmem_read()
230 return -EINVAL; in bin_attr_nvmem_read()
232 count = round_down(count, nvmem->word_size); in bin_attr_nvmem_read()
234 if (!nvmem->reg_read) in bin_attr_nvmem_read()
235 return -EPERM; in bin_attr_nvmem_read()
253 if (attr->private) in bin_attr_nvmem_write()
254 dev = attr->private; in bin_attr_nvmem_write()
259 if (!IS_ALIGNED(pos, nvmem->stride)) in bin_attr_nvmem_write()
260 return -EINVAL; in bin_attr_nvmem_write()
262 if (count < nvmem->word_size) in bin_attr_nvmem_write()
263 return -EINVAL; in bin_attr_nvmem_write()
265 count = round_down(count, nvmem->word_size); in bin_attr_nvmem_write()
267 if (!nvmem->reg_write || nvmem->read_only) in bin_attr_nvmem_write()
268 return -EPERM; in bin_attr_nvmem_write()
282 if (!nvmem->root_only) in nvmem_bin_attr_get_umode()
285 if (!nvmem->read_only) in nvmem_bin_attr_get_umode()
288 if (!nvmem->reg_write) in nvmem_bin_attr_get_umode()
291 if (!nvmem->reg_read) in nvmem_bin_attr_get_umode()
314 return nvmem->size; in nvmem_bin_attr_size()
325 * configuration as read-write. in nvmem_attr_is_visible()
326 * If the device is set as read-only by configuration, it in nvmem_attr_is_visible()
327 * can be forced into read-write mode using the 'force_ro' in nvmem_attr_is_visible()
330 if (attr == &dev_attr_force_ro.attr && !nvmem->reg_write) in nvmem_attr_is_visible()
333 return attr->mode; in nvmem_attr_is_visible()
337 const char *id, int index);
344 struct nvmem_cell *cell = NULL; in nvmem_cell_attr_read() local
348 entry = attr->private; in nvmem_cell_attr_read()
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()
354 return -EINVAL; in nvmem_cell_attr_read()
356 content = nvmem_cell_read(cell, &cell_sz); in nvmem_cell_attr_read()
362 read_len = min_t(unsigned int, cell_sz - pos, count); in nvmem_cell_attr_read()
367 kfree_const(cell->id); in nvmem_cell_attr_read()
368 kfree(cell); in nvmem_cell_attr_read()
410 * nvmem_setup_compat() - Create an additional binary entry in
419 if (!config->compat) in nvmem_sysfs_setup_compat()
422 if (!config->base_dev) in nvmem_sysfs_setup_compat()
423 return -EINVAL; in nvmem_sysfs_setup_compat()
425 nvmem->eeprom = bin_attr_nvmem_eeprom_compat; in nvmem_sysfs_setup_compat()
426 if (config->type == NVMEM_TYPE_FRAM) in nvmem_sysfs_setup_compat()
427 nvmem->eeprom.attr.name = "fram"; in nvmem_sysfs_setup_compat()
428 nvmem->eeprom.attr.mode = nvmem_bin_attr_get_umode(nvmem); in nvmem_sysfs_setup_compat()
429 nvmem->eeprom.size = nvmem->size; in nvmem_sysfs_setup_compat()
431 nvmem->eeprom.attr.key = &eeprom_lock_key; in nvmem_sysfs_setup_compat()
433 nvmem->eeprom.private = &nvmem->dev; in nvmem_sysfs_setup_compat()
434 nvmem->base_dev = config->base_dev; in nvmem_sysfs_setup_compat()
436 rval = device_create_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_sysfs_setup_compat()
438 dev_err(&nvmem->dev, in nvmem_sysfs_setup_compat()
443 nvmem->flags |= FLAG_COMPAT; in nvmem_sysfs_setup_compat()
451 if (config->compat) in nvmem_sysfs_remove_compat()
452 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_sysfs_remove_compat()
468 if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) in nvmem_populate_sysfs_cells()
472 ncells = list_count_nodes(&nvmem->cells); in nvmem_populate_sysfs_cells()
473 pattrs = devm_kcalloc(&nvmem->dev, ncells + 1, in nvmem_populate_sysfs_cells()
476 ret = -ENOMEM; in nvmem_populate_sysfs_cells()
480 attrs = devm_kcalloc(&nvmem->dev, ncells, sizeof(struct bin_attribute), GFP_KERNEL); in nvmem_populate_sysfs_cells()
482 ret = -ENOMEM; in nvmem_populate_sysfs_cells()
486 /* Initialize each attribute to take the name and size of the cell */ in nvmem_populate_sysfs_cells()
487 list_for_each_entry(entry, &nvmem->cells, node) { in nvmem_populate_sysfs_cells()
489 attrs[i].attr.name = devm_kasprintf(&nvmem->dev, GFP_KERNEL, in nvmem_populate_sysfs_cells()
490 "%s@%x,%x", entry->name, in nvmem_populate_sysfs_cells()
491 entry->offset, in nvmem_populate_sysfs_cells()
492 entry->bit_offset); in nvmem_populate_sysfs_cells()
494 attrs[i].size = entry->bytes; in nvmem_populate_sysfs_cells()
498 ret = -ENOMEM; in nvmem_populate_sysfs_cells()
508 ret = device_add_group(&nvmem->dev, &group); in nvmem_populate_sysfs_cells()
512 nvmem->sysfs_cells_populated = true; in nvmem_populate_sysfs_cells()
525 return -ENOSYS; in nvmem_sysfs_setup_compat()
538 ida_free(&nvmem_ida, nvmem->id); in nvmem_release()
539 gpiod_put(nvmem->wp_gpio); in nvmem_release()
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()
601 dev_err(&nvmem->dev, 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()
604 return -EINVAL; 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()
608 dev_err(&nvmem->dev, 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()
611 nvmem->word_size); in nvmem_cell_info_to_nvmem_cell_entry_nodup()
613 if (info->raw_len) in nvmem_cell_info_to_nvmem_cell_entry_nodup()
614 return -EINVAL; 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()
634 return -ENOMEM; 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(sizeof(*cell), GFP_KERNEL); in nvmem_add_one_cell()
654 if (!cell) in nvmem_add_one_cell()
655 return -ENOMEM; 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
694 * nvmem_register_notifier() - Register a notifier block for nvmem events.
707 * nvmem_unregister_notifier() - Unregister a notifier block for nvmem events.
722 struct nvmem_cell_entry *iter, *cell = NULL; in nvmem_find_cell_entry_by_name() local
725 list_for_each_entry(iter, &nvmem->cells, node) { in nvmem_find_cell_entry_by_name()
726 if (strcmp(cell_id, iter->name) == 0) { in nvmem_find_cell_entry_by_name()
727 cell = iter; in nvmem_find_cell_entry_by_name()
733 return cell; in nvmem_find_cell_entry_by_name()
739 const struct nvmem_keepout *keepout = nvmem->keepout; in nvmem_validate_keepouts()
740 const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; in nvmem_validate_keepouts()
744 if (keepout->start < cur) { in nvmem_validate_keepouts()
745 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
748 return -ERANGE; in nvmem_validate_keepouts()
751 if (keepout->end < keepout->start) { in nvmem_validate_keepouts()
752 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
755 return -EINVAL; in nvmem_validate_keepouts()
762 if ((keepout->end - keepout->start < nvmem->word_size) || in nvmem_validate_keepouts()
763 ((keepout->start != cur) && in nvmem_validate_keepouts()
764 (keepout->start - cur < nvmem->word_size))) { in nvmem_validate_keepouts()
766 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
769 return -ERANGE; in nvmem_validate_keepouts()
773 if (!IS_ALIGNED(keepout->start, nvmem->stride) || in nvmem_validate_keepouts()
774 !IS_ALIGNED(keepout->end, nvmem->stride)) { in nvmem_validate_keepouts()
776 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
779 return -EINVAL; in nvmem_validate_keepouts()
782 cur = keepout->end; in nvmem_validate_keepouts()
791 struct device *dev = &nvmem->dev; in nvmem_add_cells_from_dt()
805 return -EINVAL; in nvmem_add_cells_from_dt()
821 return -EINVAL; in nvmem_add_cells_from_dt()
827 if (nvmem->fixup_dt_cell_info) in nvmem_add_cells_from_dt()
828 nvmem->fixup_dt_cell_info(nvmem, &info); in nvmem_add_cells_from_dt()
843 return nvmem_add_cells_from_dt(nvmem, nvmem->dev.of_node); in nvmem_add_cells_from_legacy_of()
855 if (of_device_is_compatible(layout_np, "fixed-layout")) in nvmem_add_cells_from_fixed_layout()
867 if (!layout->add_cells) in nvmem_layout_register()
868 return -EINVAL; in nvmem_layout_register()
871 ret = layout->add_cells(layout); in nvmem_layout_register()
876 ret = nvmem_populate_sysfs_cells(layout->nvmem); in nvmem_layout_register()
878 nvmem_device_remove_all_cells(layout->nvmem); in nvmem_layout_register()
894 * nvmem_register() - Register a nvmem device for given nvmem_config.
895 * Also creates a binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
908 if (!config->dev) in nvmem_register()
909 return ERR_PTR(-EINVAL); in nvmem_register()
911 if (!config->reg_read && !config->reg_write) in nvmem_register()
912 return ERR_PTR(-EINVAL); in nvmem_register()
916 return ERR_PTR(-ENOMEM); in nvmem_register()
924 nvmem->id = rval; in nvmem_register()
926 nvmem->dev.type = &nvmem_provider_type; in nvmem_register()
927 nvmem->dev.bus = &nvmem_bus_type; in nvmem_register()
928 nvmem->dev.parent = config->dev; in nvmem_register()
930 device_initialize(&nvmem->dev); in nvmem_register()
932 if (!config->ignore_wp) in nvmem_register()
933 nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp", in nvmem_register()
935 if (IS_ERR(nvmem->wp_gpio)) { in nvmem_register()
936 rval = PTR_ERR(nvmem->wp_gpio); in nvmem_register()
937 nvmem->wp_gpio = NULL; in nvmem_register()
941 kref_init(&nvmem->refcnt); in nvmem_register()
942 INIT_LIST_HEAD(&nvmem->cells); in nvmem_register()
943 nvmem->fixup_dt_cell_info = config->fixup_dt_cell_info; in nvmem_register()
945 nvmem->owner = config->owner; in nvmem_register()
946 if (!nvmem->owner && config->dev->driver) in nvmem_register()
947 nvmem->owner = config->dev->driver->owner; in nvmem_register()
948 nvmem->stride = config->stride ?: 1; in nvmem_register()
949 nvmem->word_size = config->word_size ?: 1; in nvmem_register()
950 nvmem->size = config->size; in nvmem_register()
951 nvmem->root_only = config->root_only; in nvmem_register()
952 nvmem->priv = config->priv; in nvmem_register()
953 nvmem->type = config->type; in nvmem_register()
954 nvmem->reg_read = config->reg_read; in nvmem_register()
955 nvmem->reg_write = config->reg_write; in nvmem_register()
956 nvmem->keepout = config->keepout; in nvmem_register()
957 nvmem->nkeepout = config->nkeepout; in nvmem_register()
958 if (config->of_node) in nvmem_register()
959 nvmem->dev.of_node = config->of_node; in nvmem_register()
961 nvmem->dev.of_node = config->dev->of_node; in nvmem_register()
963 switch (config->id) { in nvmem_register()
965 rval = dev_set_name(&nvmem->dev, "%s", config->name); in nvmem_register()
968 rval = dev_set_name(&nvmem->dev, "%s%d", config->name, nvmem->id); in nvmem_register()
971 rval = dev_set_name(&nvmem->dev, "%s%d", in nvmem_register()
972 config->name ? : "nvmem", in nvmem_register()
973 config->name ? config->id : nvmem->id); in nvmem_register()
980 nvmem->read_only = device_property_present(config->dev, "read-only") || in nvmem_register()
981 config->read_only || !nvmem->reg_write; in nvmem_register()
984 nvmem->dev.groups = nvmem_dev_groups; in nvmem_register()
987 if (nvmem->nkeepout) { in nvmem_register()
993 if (config->compat) { in nvmem_register()
999 if (config->cells) { in nvmem_register()
1000 rval = nvmem_add_cells(nvmem, config->cells, config->ncells); in nvmem_register()
1005 if (config->add_legacy_fixed_of_cells) { in nvmem_register()
1015 dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name); in nvmem_register()
1017 rval = device_add(&nvmem->dev); in nvmem_register()
1040 device_del(&nvmem->dev); in nvmem_register()
1043 if (config->compat) in nvmem_register()
1046 put_device(&nvmem->dev); in nvmem_register()
1060 if (nvmem->flags & FLAG_COMPAT) in nvmem_device_release()
1061 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_device_release()
1065 device_unregister(&nvmem->dev); in nvmem_device_release()
1069 * nvmem_unregister() - Unregister previously registered nvmem device
1076 kref_put(&nvmem->refcnt, nvmem_device_release); in nvmem_unregister()
1086 * devm_nvmem_register() - Register a managed nvmem device for given
1088 * Also creates a binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
1126 return ERR_PTR(-EPROBE_DEFER); in __nvmem_device_get()
1128 if (!try_module_get(nvmem->owner)) { in __nvmem_device_get()
1129 dev_err(&nvmem->dev, in __nvmem_device_get()
1130 "could not increase module refcount for cell %s\n", in __nvmem_device_get()
1133 put_device(&nvmem->dev); in __nvmem_device_get()
1134 return ERR_PTR(-EINVAL); in __nvmem_device_get()
1137 kref_get(&nvmem->refcnt); in __nvmem_device_get()
1144 put_device(&nvmem->dev); in __nvmem_device_put()
1145 module_put(nvmem->owner); in __nvmem_device_put()
1146 kref_put(&nvmem->refcnt, nvmem_device_release); in __nvmem_device_put()
1151 * of_nvmem_device_get() - Get nvmem device from a given id
1154 * @id: nvmem name from nvmem-names property.
1164 int index = 0; in of_nvmem_device_get() local
1167 index = of_property_match_string(np, "nvmem-names", id); in of_nvmem_device_get()
1169 nvmem_np = of_parse_phandle(np, "nvmem", index); in of_nvmem_device_get()
1171 return ERR_PTR(-ENOENT); in of_nvmem_device_get()
1181 * nvmem_device_get() - Get nvmem device from a given id
1191 if (dev->of_node) { /* try dt first */ in nvmem_device_get()
1194 nvmem = of_nvmem_device_get(dev->of_node, dev_name); in nvmem_device_get()
1196 if (!IS_ERR(nvmem) || PTR_ERR(nvmem) == -EPROBE_DEFER) in nvmem_device_get()
1206 * nvmem_device_find() - Find nvmem device with matching function
1237 * devm_nvmem_device_put() - put already got nvmem device
1255 * nvmem_device_put() - put already got nvmem device
1266 * devm_nvmem_device_get() - Get nvmem device of device form a given id
1281 return ERR_PTR(-ENOMEM); in devm_nvmem_device_get()
1296 const char *id, int index) in nvmem_create_cell() argument
1298 struct nvmem_cell *cell; in nvmem_create_cell() local
1301 cell = kzalloc(sizeof(*cell), GFP_KERNEL); in nvmem_create_cell()
1302 if (!cell) in nvmem_create_cell()
1303 return ERR_PTR(-ENOMEM); in nvmem_create_cell()
1308 kfree(cell); in nvmem_create_cell()
1309 return ERR_PTR(-ENOMEM); in nvmem_create_cell()
1313 cell->id = name; in nvmem_create_cell()
1314 cell->entry = entry; in nvmem_create_cell()
1315 cell->index = index; in nvmem_create_cell()
1317 return cell; in nvmem_create_cell()
1324 struct nvmem_cell *cell = ERR_PTR(-ENOENT); in nvmem_cell_get_from_lookup() local
1330 return ERR_PTR(-EINVAL); in nvmem_cell_get_from_lookup()
1337 if ((strcmp(lookup->dev_id, dev_id) == 0) && in nvmem_cell_get_from_lookup()
1338 (strcmp(lookup->con_id, con_id) == 0)) { in nvmem_cell_get_from_lookup()
1340 nvmem = __nvmem_device_get((void *)lookup->nvmem_name, in nvmem_cell_get_from_lookup()
1344 cell = ERR_CAST(nvmem); in nvmem_cell_get_from_lookup()
1349 lookup->cell_name); in nvmem_cell_get_from_lookup()
1352 cell = ERR_PTR(-ENOENT); in nvmem_cell_get_from_lookup()
1354 cell = nvmem_create_cell(cell_entry, con_id, 0); in nvmem_cell_get_from_lookup()
1355 if (IS_ERR(cell)) in nvmem_cell_get_from_lookup()
1363 return cell; in nvmem_cell_get_from_lookup()
1368 if (nvmem->layout && nvmem->layout->dev.driver) in nvmem_layout_module_put()
1369 module_put(nvmem->layout->dev.driver->owner); in nvmem_layout_module_put()
1376 struct nvmem_cell_entry *iter, *cell = NULL; in nvmem_find_cell_entry_by_node() local
1379 list_for_each_entry(iter, &nvmem->cells, node) { in nvmem_find_cell_entry_by_node()
1380 if (np == iter->np) { in nvmem_find_cell_entry_by_node()
1381 cell = iter; in nvmem_find_cell_entry_by_node()
1387 return cell; in nvmem_find_cell_entry_by_node()
1392 if (!nvmem->layout) in nvmem_layout_module_get_optional()
1395 if (!nvmem->layout->dev.driver || in nvmem_layout_module_get_optional()
1396 !try_module_get(nvmem->layout->dev.driver->owner)) in nvmem_layout_module_get_optional()
1397 return -EPROBE_DEFER; in nvmem_layout_module_get_optional()
1403 * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1405 * @np: Device tree node that uses the nvmem cell.
1406 * @id: nvmem cell name from nvmem-cell-names property, or NULL
1407 * for the cell at index 0 (the lone cell with no accompanying
1408 * nvmem-cell-names property).
1419 struct nvmem_cell *cell; in of_nvmem_cell_get() local
1421 int index = 0; in of_nvmem_cell_get() local
1425 /* if cell name exists, find index to the name */ in of_nvmem_cell_get()
1427 index = of_property_match_string(np, "nvmem-cell-names", id); in of_nvmem_cell_get()
1429 ret = of_parse_phandle_with_optional_args(np, "nvmem-cells", in of_nvmem_cell_get()
1430 "#nvmem-cell-cells", in of_nvmem_cell_get()
1431 index, &cell_spec); in of_nvmem_cell_get()
1433 return ERR_PTR(-ENOENT); in of_nvmem_cell_get()
1436 return ERR_PTR(-EINVAL); in of_nvmem_cell_get()
1445 return ERR_PTR(-EINVAL); in of_nvmem_cell_get()
1448 /* nvmem layouts produce cells within the nvmem-layout container */ in of_nvmem_cell_get()
1449 if (of_node_name_eq(nvmem_np, "nvmem-layout")) { in of_nvmem_cell_get()
1453 return ERR_PTR(-EINVAL); in of_nvmem_cell_get()
1476 if (nvmem->layout) in of_nvmem_cell_get()
1477 return ERR_PTR(-EPROBE_DEFER); in of_nvmem_cell_get()
1479 return ERR_PTR(-ENOENT); in of_nvmem_cell_get()
1482 cell = nvmem_create_cell(cell_entry, id, cell_index); in of_nvmem_cell_get()
1483 if (IS_ERR(cell)) { in of_nvmem_cell_get()
1488 return cell; in of_nvmem_cell_get()
1494 * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1496 * @dev: Device that requests the nvmem cell.
1497 * @id: nvmem cell name to get (this corresponds with the name from the
1498 * nvmem-cell-names property for DT systems and with the con_id from
1499 * the lookup entry for non-DT systems).
1507 struct nvmem_cell *cell; in nvmem_cell_get() local
1509 if (dev->of_node) { /* try dt first */ in nvmem_cell_get()
1510 cell = of_nvmem_cell_get(dev->of_node, id); in nvmem_cell_get()
1511 if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER) in nvmem_cell_get()
1512 return cell; in nvmem_cell_get()
1515 /* NULL cell id only allowed for device tree; invalid otherwise */ in nvmem_cell_get()
1517 return ERR_PTR(-EINVAL); in nvmem_cell_get()
1529 * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1531 * @dev: Device that requests the nvmem cell.
1532 * @id: nvmem cell name id to get.
1540 struct nvmem_cell **ptr, *cell; in devm_nvmem_cell_get() local
1544 return ERR_PTR(-ENOMEM); in devm_nvmem_cell_get()
1546 cell = nvmem_cell_get(dev, id); in devm_nvmem_cell_get()
1547 if (!IS_ERR(cell)) { in devm_nvmem_cell_get()
1548 *ptr = cell; in devm_nvmem_cell_get()
1554 return cell; in devm_nvmem_cell_get()
1569 * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1572 * @dev: Device that requests the nvmem cell.
1573 * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1575 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell) in devm_nvmem_cell_put() argument
1580 devm_nvmem_cell_match, cell); in devm_nvmem_cell_put()
1587 * nvmem_cell_put() - Release previously allocated nvmem cell.
1589 * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1591 void nvmem_cell_put(struct nvmem_cell *cell) in nvmem_cell_put() argument
1593 struct nvmem_device *nvmem = cell->entry->nvmem; in nvmem_cell_put()
1595 if (cell->id) in nvmem_cell_put()
1596 kfree_const(cell->id); in nvmem_cell_put()
1598 kfree(cell); in nvmem_cell_put()
1604 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf) in nvmem_shift_read_buffer_in_place() argument
1608 int bit_offset = cell->bit_offset; in nvmem_shift_read_buffer_in_place()
1621 for (i = 1; i < cell->bytes; i++) { in nvmem_shift_read_buffer_in_place()
1623 *p++ |= *b << (BITS_PER_BYTE - bit_offset); in nvmem_shift_read_buffer_in_place()
1628 memmove(p, b, cell->bytes - bytes_offset); in nvmem_shift_read_buffer_in_place()
1629 p += cell->bytes - 1; in nvmem_shift_read_buffer_in_place()
1632 p += cell->bytes - 1; in nvmem_shift_read_buffer_in_place()
1636 extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE); in nvmem_shift_read_buffer_in_place()
1637 while (--extra >= 0) in nvmem_shift_read_buffer_in_place()
1638 *p-- = 0; in nvmem_shift_read_buffer_in_place()
1641 if (cell->nbits % BITS_PER_BYTE) in nvmem_shift_read_buffer_in_place()
1642 *p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0); in nvmem_shift_read_buffer_in_place()
1646 struct nvmem_cell_entry *cell, in __nvmem_cell_read() argument
1647 void *buf, size_t *len, const char *id, int index) in __nvmem_cell_read() argument
1651 rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len); in __nvmem_cell_read()
1656 /* shift bits in-place */ in __nvmem_cell_read()
1657 if (cell->bit_offset || cell->nbits) in __nvmem_cell_read()
1658 nvmem_shift_read_buffer_in_place(cell, buf); in __nvmem_cell_read()
1660 if (cell->read_post_process) { in __nvmem_cell_read()
1661 rc = cell->read_post_process(cell->priv, id, index, in __nvmem_cell_read()
1662 cell->offset, buf, cell->raw_len); in __nvmem_cell_read()
1668 *len = cell->bytes; in __nvmem_cell_read()
1674 * nvmem_cell_read() - Read a given nvmem cell
1676 * @cell: nvmem cell to be read.
1677 * @len: pointer to length of cell which will be populated on successful read;
1683 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len) in nvmem_cell_read() argument
1685 struct nvmem_cell_entry *entry = cell->entry; in nvmem_cell_read()
1686 struct nvmem_device *nvmem = entry->nvmem; in nvmem_cell_read()
1691 return ERR_PTR(-EINVAL); in nvmem_cell_read()
1693 buf = kzalloc(max_t(size_t, entry->raw_len, entry->bytes), GFP_KERNEL); in nvmem_cell_read()
1695 return ERR_PTR(-ENOMEM); in nvmem_cell_read()
1697 rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index); in nvmem_cell_read()
1707 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell, in nvmem_cell_prepare_write_buffer() argument
1710 struct nvmem_device *nvmem = cell->nvmem; in nvmem_cell_prepare_write_buffer()
1711 int i, rc, nbits, bit_offset = cell->bit_offset; in nvmem_cell_prepare_write_buffer()
1714 nbits = cell->nbits; in nvmem_cell_prepare_write_buffer()
1715 buf = kzalloc(cell->bytes, GFP_KERNEL); in nvmem_cell_prepare_write_buffer()
1717 return ERR_PTR(-ENOMEM); in nvmem_cell_prepare_write_buffer()
1727 rc = nvmem_reg_read(nvmem, cell->offset, &v, 1); in nvmem_cell_prepare_write_buffer()
1730 *b++ |= GENMASK(bit_offset - 1, 0) & v; in nvmem_cell_prepare_write_buffer()
1733 for (i = 1; i < cell->bytes; i++) { in nvmem_cell_prepare_write_buffer()
1735 pbits = pbyte >> (BITS_PER_BYTE - 1 - bit_offset); in nvmem_cell_prepare_write_buffer()
1747 cell->offset + cell->bytes - 1, &v, 1); in nvmem_cell_prepare_write_buffer()
1760 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len) in __nvmem_cell_entry_write() argument
1762 struct nvmem_device *nvmem = cell->nvmem; in __nvmem_cell_entry_write()
1765 if (!nvmem || nvmem->read_only || in __nvmem_cell_entry_write()
1766 (cell->bit_offset == 0 && len != cell->bytes)) in __nvmem_cell_entry_write()
1767 return -EINVAL; in __nvmem_cell_entry_write()
1770 * Any cells which have a read_post_process hook are read-only because in __nvmem_cell_entry_write()
1774 if (cell->read_post_process) in __nvmem_cell_entry_write()
1775 return -EINVAL; in __nvmem_cell_entry_write()
1777 if (cell->bit_offset || cell->nbits) { in __nvmem_cell_entry_write()
1778 if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes) in __nvmem_cell_entry_write()
1779 return -EINVAL; in __nvmem_cell_entry_write()
1780 buf = nvmem_cell_prepare_write_buffer(cell, buf, len); in __nvmem_cell_entry_write()
1785 rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes); in __nvmem_cell_entry_write()
1788 if (cell->bit_offset || cell->nbits) in __nvmem_cell_entry_write()
1798 * nvmem_cell_write() - Write to a given nvmem cell
1800 * @cell: nvmem cell to be written.
1802 * @len: length of buffer to be written to nvmem cell.
1806 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len) in nvmem_cell_write() argument
1808 return __nvmem_cell_entry_write(cell->entry, buf, len); in nvmem_cell_write()
1816 struct nvmem_cell *cell; in nvmem_cell_read_common() local
1820 cell = nvmem_cell_get(dev, cell_id); in nvmem_cell_read_common()
1821 if (IS_ERR(cell)) in nvmem_cell_read_common()
1822 return PTR_ERR(cell); in nvmem_cell_read_common()
1824 buf = nvmem_cell_read(cell, &len); in nvmem_cell_read_common()
1826 nvmem_cell_put(cell); in nvmem_cell_read_common()
1831 nvmem_cell_put(cell); in nvmem_cell_read_common()
1832 return -EINVAL; in nvmem_cell_read_common()
1836 nvmem_cell_put(cell); in nvmem_cell_read_common()
1842 * nvmem_cell_read_u8() - Read a cell value as a u8
1844 * @dev: Device that requests the nvmem cell.
1845 * @cell_id: Name of nvmem cell to read.
1857 * nvmem_cell_read_u16() - Read a cell value as a u16
1859 * @dev: Device that requests the nvmem cell.
1860 * @cell_id: Name of nvmem cell to read.
1872 * nvmem_cell_read_u32() - Read a cell value as a u32
1874 * @dev: Device that requests the nvmem cell.
1875 * @cell_id: Name of nvmem cell to read.
1887 * nvmem_cell_read_u64() - Read a cell value as a u64
1889 * @dev: Device that requests the nvmem cell.
1890 * @cell_id: Name of nvmem cell to read.
1905 struct nvmem_cell *cell; in nvmem_cell_read_variable_common() local
1909 cell = nvmem_cell_get(dev, cell_id); in nvmem_cell_read_variable_common()
1910 if (IS_ERR(cell)) in nvmem_cell_read_variable_common()
1911 return cell; in nvmem_cell_read_variable_common()
1913 nbits = cell->entry->nbits; in nvmem_cell_read_variable_common()
1914 buf = nvmem_cell_read(cell, len); in nvmem_cell_read_variable_common()
1915 nvmem_cell_put(cell); in nvmem_cell_read_variable_common()
1928 return ERR_PTR(-ERANGE); in nvmem_cell_read_variable_common()
1935 * nvmem_cell_read_variable_le_u32() - Read up to 32-bits of data as a little endian number.
1937 * @dev: Device that requests the nvmem cell.
1938 * @cell_id: Name of nvmem cell to read.
1966 * nvmem_cell_read_variable_le_u64() - Read up to 64-bits of data as a little endian number.
1968 * @dev: Device that requests the nvmem cell.
1969 * @cell_id: Name of nvmem cell to read.
1997 * nvmem_device_cell_read() - Read a given nvmem device and cell
2000 * @info: nvmem cell info to be read.
2009 struct nvmem_cell_entry cell; in nvmem_device_cell_read() local
2014 return -EINVAL; in nvmem_device_cell_read()
2016 rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell); in nvmem_device_cell_read()
2020 rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0); in nvmem_device_cell_read()
2029 * nvmem_device_cell_write() - Write cell to a given nvmem device
2032 * @info: nvmem cell info to be written.
2033 * @buf: buffer to be written to cell.
2040 struct nvmem_cell_entry cell; in nvmem_device_cell_write() local
2044 return -EINVAL; in nvmem_device_cell_write()
2046 rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell); in nvmem_device_cell_write()
2050 return __nvmem_cell_entry_write(&cell, buf, cell.bytes); in nvmem_device_cell_write()
2055 * nvmem_device_read() - Read from a given nvmem device
2072 return -EINVAL; in nvmem_device_read()
2084 * nvmem_device_write() - Write cell to a given nvmem device
2100 return -EINVAL; in nvmem_device_write()
2113 * nvmem_add_cell_lookups() - register a list of cell lookup entries
2115 * @entries: array of cell lookup entries
2116 * @nentries: number of cell lookup entries in the array
2130 * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2133 * @entries: array of cell lookup entries
2134 * @nentries: number of cell lookup entries in the array
2148 * nvmem_dev_name() - Get the name of a given nvmem device.
2156 return dev_name(&nvmem->dev); in nvmem_dev_name()
2161 * nvmem_dev_size() - Get the size of a given nvmem device.
2169 return nvmem->size; in nvmem_dev_size()
2198 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com");