Lines Matching +full:nvmem +full:- +full:cell +full:- +full:names
1 // SPDX-License-Identifier: GPL-2.0
3 * nvmem framework core.
6 * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
16 #include <linux/nvmem-consumer.h>
17 #include <linux/nvmem-provider.h>
37 struct nvmem_device *nvmem; member
58 static int __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, in __nvmem_reg_read() argument
61 if (nvmem->reg_read) in __nvmem_reg_read()
62 return nvmem->reg_read(nvmem->priv, offset, val, bytes); in __nvmem_reg_read()
64 return -EINVAL; in __nvmem_reg_read()
67 static int __nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, in __nvmem_reg_write() argument
72 if (nvmem->reg_write) { in __nvmem_reg_write()
73 gpiod_set_value_cansleep(nvmem->wp_gpio, 0); in __nvmem_reg_write()
74 ret = nvmem->reg_write(nvmem->priv, offset, val, bytes); in __nvmem_reg_write()
75 gpiod_set_value_cansleep(nvmem->wp_gpio, 1); in __nvmem_reg_write()
79 return -EINVAL; in __nvmem_reg_write()
82 static int nvmem_access_with_keepouts(struct nvmem_device *nvmem, in nvmem_access_with_keepouts() argument
89 const struct nvmem_keepout *keepout = nvmem->keepout; in nvmem_access_with_keepouts()
90 const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; in nvmem_access_with_keepouts()
97 while ((keepout < keepoutend) && (keepout->end <= offset)) in nvmem_access_with_keepouts()
102 if (offset < keepout->start) { in nvmem_access_with_keepouts()
103 kend = min(end, keepout->start); in nvmem_access_with_keepouts()
104 ksize = kend - offset; in nvmem_access_with_keepouts()
106 rc = __nvmem_reg_write(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
108 rc = __nvmem_reg_read(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
121 kend = min(end, keepout->end); in nvmem_access_with_keepouts()
122 ksize = kend - offset; in nvmem_access_with_keepouts()
124 memset(val, keepout->value, ksize); in nvmem_access_with_keepouts()
136 ksize = end - offset; in nvmem_access_with_keepouts()
138 return __nvmem_reg_write(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
140 return __nvmem_reg_read(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
146 static int nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, in nvmem_reg_read() argument
149 if (!nvmem->nkeepout) in nvmem_reg_read()
150 return __nvmem_reg_read(nvmem, offset, val, bytes); in nvmem_reg_read()
152 return nvmem_access_with_keepouts(nvmem, offset, val, bytes, false); in nvmem_reg_read()
155 static int nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, in nvmem_reg_write() argument
158 if (!nvmem->nkeepout) in nvmem_reg_write()
159 return __nvmem_reg_write(nvmem, offset, val, bytes); in nvmem_reg_write()
161 return nvmem_access_with_keepouts(nvmem, offset, val, bytes, true); in nvmem_reg_write()
180 struct nvmem_device *nvmem = to_nvmem_device(dev); in type_show() local
182 return sysfs_emit(buf, "%s\n", nvmem_type_str[nvmem->type]); in type_show()
190 struct nvmem_device *nvmem = to_nvmem_device(dev); in force_ro_show() local
192 return sysfs_emit(buf, "%d\n", nvmem->read_only); in force_ro_show()
198 struct nvmem_device *nvmem = to_nvmem_device(dev); in force_ro_store() local
199 int ret = kstrtobool(buf, &nvmem->read_only); in force_ro_store()
220 struct nvmem_device *nvmem; in bin_attr_nvmem_read() local
223 if (attr->private) in bin_attr_nvmem_read()
224 dev = attr->private; in bin_attr_nvmem_read()
227 nvmem = to_nvmem_device(dev); in bin_attr_nvmem_read()
229 if (!IS_ALIGNED(pos, nvmem->stride)) in bin_attr_nvmem_read()
230 return -EINVAL; in bin_attr_nvmem_read()
232 if (count < nvmem->word_size) in bin_attr_nvmem_read()
233 return -EINVAL; in bin_attr_nvmem_read()
235 count = round_down(count, nvmem->word_size); in bin_attr_nvmem_read()
237 if (!nvmem->reg_read) in bin_attr_nvmem_read()
238 return -EPERM; in bin_attr_nvmem_read()
240 rc = nvmem_reg_read(nvmem, pos, buf, count); in bin_attr_nvmem_read()
253 struct nvmem_device *nvmem; in bin_attr_nvmem_write() local
256 if (attr->private) in bin_attr_nvmem_write()
257 dev = attr->private; in bin_attr_nvmem_write()
260 nvmem = to_nvmem_device(dev); in bin_attr_nvmem_write()
262 if (!IS_ALIGNED(pos, nvmem->stride)) in bin_attr_nvmem_write()
263 return -EINVAL; in bin_attr_nvmem_write()
265 if (count < nvmem->word_size) in bin_attr_nvmem_write()
266 return -EINVAL; in bin_attr_nvmem_write()
268 count = round_down(count, nvmem->word_size); in bin_attr_nvmem_write()
270 if (!nvmem->reg_write || nvmem->read_only) in bin_attr_nvmem_write()
271 return -EPERM; in bin_attr_nvmem_write()
273 rc = nvmem_reg_write(nvmem, pos, buf, count); in bin_attr_nvmem_write()
281 static umode_t nvmem_bin_attr_get_umode(struct nvmem_device *nvmem) in nvmem_bin_attr_get_umode() argument
285 if (!nvmem->root_only) in nvmem_bin_attr_get_umode()
288 if (!nvmem->read_only) in nvmem_bin_attr_get_umode()
291 if (!nvmem->reg_write) in nvmem_bin_attr_get_umode()
294 if (!nvmem->reg_read) in nvmem_bin_attr_get_umode()
305 struct nvmem_device *nvmem = to_nvmem_device(dev); in nvmem_bin_attr_is_visible() local
307 return nvmem_bin_attr_get_umode(nvmem); in nvmem_bin_attr_is_visible()
315 struct nvmem_device *nvmem = to_nvmem_device(dev); in nvmem_bin_attr_size() local
317 return nvmem->size; in nvmem_bin_attr_size()
324 struct nvmem_device *nvmem = to_nvmem_device(dev); in nvmem_attr_is_visible() local
328 * configuration as read-write. in nvmem_attr_is_visible()
329 * If the device is set as read-only by configuration, it in nvmem_attr_is_visible()
330 * can be forced into read-write mode using the 'force_ro' in nvmem_attr_is_visible()
333 if (attr == &dev_attr_force_ro.attr && !nvmem->reg_write) in nvmem_attr_is_visible()
336 return attr->mode; in nvmem_attr_is_visible()
347 struct nvmem_cell *cell = NULL; in nvmem_cell_attr_read() local
351 entry = attr->private; in nvmem_cell_attr_read()
352 cell = nvmem_create_cell(entry, entry->name, 0); in nvmem_cell_attr_read()
353 if (IS_ERR(cell)) in nvmem_cell_attr_read()
354 return PTR_ERR(cell); in nvmem_cell_attr_read()
356 if (!cell) in nvmem_cell_attr_read()
357 return -EINVAL; in nvmem_cell_attr_read()
359 content = nvmem_cell_read(cell, &cell_sz); in nvmem_cell_attr_read()
365 read_len = min_t(unsigned int, cell_sz - pos, count); in nvmem_cell_attr_read()
370 kfree_const(cell->id); in nvmem_cell_attr_read()
371 kfree(cell); in nvmem_cell_attr_read()
379 .name = "nvmem",
413 * nvmem_setup_compat() - Create an additional binary entry in
417 static int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem, in nvmem_sysfs_setup_compat() argument
422 if (!config->compat) in nvmem_sysfs_setup_compat()
425 if (!config->base_dev) in nvmem_sysfs_setup_compat()
426 return -EINVAL; in nvmem_sysfs_setup_compat()
428 nvmem->eeprom = bin_attr_nvmem_eeprom_compat; in nvmem_sysfs_setup_compat()
429 if (config->type == NVMEM_TYPE_FRAM) in nvmem_sysfs_setup_compat()
430 nvmem->eeprom.attr.name = "fram"; in nvmem_sysfs_setup_compat()
431 nvmem->eeprom.attr.mode = nvmem_bin_attr_get_umode(nvmem); in nvmem_sysfs_setup_compat()
432 nvmem->eeprom.size = nvmem->size; in nvmem_sysfs_setup_compat()
434 nvmem->eeprom.attr.key = &eeprom_lock_key; in nvmem_sysfs_setup_compat()
436 nvmem->eeprom.private = &nvmem->dev; in nvmem_sysfs_setup_compat()
437 nvmem->base_dev = config->base_dev; in nvmem_sysfs_setup_compat()
439 rval = device_create_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_sysfs_setup_compat()
441 dev_err(&nvmem->dev, in nvmem_sysfs_setup_compat()
446 nvmem->flags |= FLAG_COMPAT; in nvmem_sysfs_setup_compat()
451 static void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem, in nvmem_sysfs_remove_compat() argument
454 if (config->compat) in nvmem_sysfs_remove_compat()
455 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_sysfs_remove_compat()
458 static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem) in nvmem_populate_sysfs_cells() argument
471 if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) in nvmem_populate_sysfs_cells()
475 ncells = list_count_nodes(&nvmem->cells); in nvmem_populate_sysfs_cells()
476 pattrs = devm_kcalloc(&nvmem->dev, ncells + 1, in nvmem_populate_sysfs_cells()
479 ret = -ENOMEM; in nvmem_populate_sysfs_cells()
483 attrs = devm_kcalloc(&nvmem->dev, ncells, sizeof(struct bin_attribute), GFP_KERNEL); in nvmem_populate_sysfs_cells()
485 ret = -ENOMEM; in nvmem_populate_sysfs_cells()
489 /* Initialize each attribute to take the name and size of the cell */ in nvmem_populate_sysfs_cells()
490 list_for_each_entry(entry, &nvmem->cells, node) { in nvmem_populate_sysfs_cells()
492 attrs[i].attr.name = devm_kasprintf(&nvmem->dev, GFP_KERNEL, in nvmem_populate_sysfs_cells()
493 "%s@%x,%x", entry->name, in nvmem_populate_sysfs_cells()
494 entry->offset, in nvmem_populate_sysfs_cells()
495 entry->bit_offset); in nvmem_populate_sysfs_cells()
496 attrs[i].attr.mode = 0444 & nvmem_bin_attr_get_umode(nvmem); in nvmem_populate_sysfs_cells()
497 attrs[i].size = entry->bytes; in nvmem_populate_sysfs_cells()
501 ret = -ENOMEM; in nvmem_populate_sysfs_cells()
511 ret = device_add_group(&nvmem->dev, &group); in nvmem_populate_sysfs_cells()
515 nvmem->sysfs_cells_populated = true; in nvmem_populate_sysfs_cells()
525 static int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem, in nvmem_sysfs_setup_compat() argument
528 return -ENOSYS; in nvmem_sysfs_setup_compat()
530 static void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem, in nvmem_sysfs_remove_compat() argument
539 struct nvmem_device *nvmem = to_nvmem_device(dev); in nvmem_release() local
541 ida_free(&nvmem_ida, nvmem->id); in nvmem_release()
542 gpiod_put(nvmem->wp_gpio); in nvmem_release()
543 kfree(nvmem); in nvmem_release()
551 .name = "nvmem",
554 static void nvmem_cell_entry_drop(struct nvmem_cell_entry *cell) in nvmem_cell_entry_drop() argument
556 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_REMOVE, cell); in nvmem_cell_entry_drop()
558 list_del(&cell->node); in nvmem_cell_entry_drop()
560 of_node_put(cell->np); in nvmem_cell_entry_drop()
561 kfree_const(cell->name); in nvmem_cell_entry_drop()
562 kfree(cell); in nvmem_cell_entry_drop()
565 static void nvmem_device_remove_all_cells(const struct nvmem_device *nvmem) in nvmem_device_remove_all_cells() argument
567 struct nvmem_cell_entry *cell, *p; in nvmem_device_remove_all_cells() local
569 list_for_each_entry_safe(cell, p, &nvmem->cells, node) in nvmem_device_remove_all_cells()
570 nvmem_cell_entry_drop(cell); in nvmem_device_remove_all_cells()
573 static void nvmem_cell_entry_add(struct nvmem_cell_entry *cell) in nvmem_cell_entry_add() argument
576 list_add_tail(&cell->node, &cell->nvmem->cells); in nvmem_cell_entry_add()
578 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_CELL_ADD, cell); in nvmem_cell_entry_add()
581 static int nvmem_cell_info_to_nvmem_cell_entry_nodup(struct nvmem_device *nvmem, in nvmem_cell_info_to_nvmem_cell_entry_nodup() argument
583 struct nvmem_cell_entry *cell) in nvmem_cell_info_to_nvmem_cell_entry_nodup() argument
585 cell->nvmem = nvmem; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
586 cell->offset = info->offset; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
587 cell->raw_len = info->raw_len ?: info->bytes; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
588 cell->bytes = info->bytes; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
589 cell->name = info->name; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
590 cell->read_post_process = info->read_post_process; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
591 cell->priv = info->priv; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
593 cell->bit_offset = info->bit_offset; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
594 cell->nbits = info->nbits; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
595 cell->np = info->np; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
597 if (cell->nbits) in nvmem_cell_info_to_nvmem_cell_entry_nodup()
598 cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset, in nvmem_cell_info_to_nvmem_cell_entry_nodup()
601 if (!IS_ALIGNED(cell->offset, nvmem->stride)) { in nvmem_cell_info_to_nvmem_cell_entry_nodup()
602 dev_err(&nvmem->dev, in nvmem_cell_info_to_nvmem_cell_entry_nodup()
603 "cell %s unaligned to nvmem stride %d\n", in nvmem_cell_info_to_nvmem_cell_entry_nodup()
604 cell->name ?: "<unknown>", nvmem->stride); in nvmem_cell_info_to_nvmem_cell_entry_nodup()
605 return -EINVAL; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
611 static int nvmem_cell_info_to_nvmem_cell_entry(struct nvmem_device *nvmem, in nvmem_cell_info_to_nvmem_cell_entry() argument
613 struct nvmem_cell_entry *cell) in nvmem_cell_info_to_nvmem_cell_entry() argument
617 err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell); in nvmem_cell_info_to_nvmem_cell_entry()
621 cell->name = kstrdup_const(info->name, GFP_KERNEL); in nvmem_cell_info_to_nvmem_cell_entry()
622 if (!cell->name) in nvmem_cell_info_to_nvmem_cell_entry()
623 return -ENOMEM; in nvmem_cell_info_to_nvmem_cell_entry()
629 * nvmem_add_one_cell() - Add one cell information to an nvmem device
631 * @nvmem: nvmem device to add cells to.
632 * @info: nvmem cell info to add to the device
636 int nvmem_add_one_cell(struct nvmem_device *nvmem, in nvmem_add_one_cell() argument
639 struct nvmem_cell_entry *cell; in nvmem_add_one_cell() local
642 cell = kzalloc(sizeof(*cell), GFP_KERNEL); in nvmem_add_one_cell()
643 if (!cell) in nvmem_add_one_cell()
644 return -ENOMEM; in nvmem_add_one_cell()
646 rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell); in nvmem_add_one_cell()
648 kfree(cell); in nvmem_add_one_cell()
652 nvmem_cell_entry_add(cell); in nvmem_add_one_cell()
659 * nvmem_add_cells() - Add cell information to an nvmem device
661 * @nvmem: nvmem device to add cells to.
662 * @info: nvmem cell info to add to the device
667 static int nvmem_add_cells(struct nvmem_device *nvmem, in nvmem_add_cells() argument
674 rval = nvmem_add_one_cell(nvmem, &info[i]); in nvmem_add_cells()
683 * nvmem_register_notifier() - Register a notifier block for nvmem events.
685 * @nb: notifier block to be called on nvmem events.
696 * nvmem_unregister_notifier() - Unregister a notifier block for nvmem events.
708 static int nvmem_add_cells_from_table(struct nvmem_device *nvmem) in nvmem_add_cells_from_table() argument
712 struct nvmem_cell_entry *cell; in nvmem_add_cells_from_table() local
717 if (strcmp(nvmem_dev_name(nvmem), table->nvmem_name) == 0) { in nvmem_add_cells_from_table()
718 for (i = 0; i < table->ncells; i++) { in nvmem_add_cells_from_table()
719 info = &table->cells[i]; in nvmem_add_cells_from_table()
721 cell = kzalloc(sizeof(*cell), GFP_KERNEL); in nvmem_add_cells_from_table()
722 if (!cell) { in nvmem_add_cells_from_table()
723 rval = -ENOMEM; in nvmem_add_cells_from_table()
727 rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell); in nvmem_add_cells_from_table()
729 kfree(cell); in nvmem_add_cells_from_table()
733 nvmem_cell_entry_add(cell); in nvmem_add_cells_from_table()
744 nvmem_find_cell_entry_by_name(struct nvmem_device *nvmem, const char *cell_id) in nvmem_find_cell_entry_by_name() argument
746 struct nvmem_cell_entry *iter, *cell = NULL; in nvmem_find_cell_entry_by_name() local
749 list_for_each_entry(iter, &nvmem->cells, node) { in nvmem_find_cell_entry_by_name()
750 if (strcmp(cell_id, iter->name) == 0) { in nvmem_find_cell_entry_by_name()
751 cell = iter; in nvmem_find_cell_entry_by_name()
757 return cell; in nvmem_find_cell_entry_by_name()
760 static int nvmem_validate_keepouts(struct nvmem_device *nvmem) in nvmem_validate_keepouts() argument
763 const struct nvmem_keepout *keepout = nvmem->keepout; in nvmem_validate_keepouts()
764 const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; in nvmem_validate_keepouts()
768 if (keepout->start < cur) { in nvmem_validate_keepouts()
769 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
772 return -ERANGE; in nvmem_validate_keepouts()
775 if (keepout->end < keepout->start) { in nvmem_validate_keepouts()
776 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
779 return -EINVAL; in nvmem_validate_keepouts()
786 if ((keepout->end - keepout->start < nvmem->word_size) || in nvmem_validate_keepouts()
787 ((keepout->start != cur) && in nvmem_validate_keepouts()
788 (keepout->start - cur < nvmem->word_size))) { in nvmem_validate_keepouts()
790 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
793 return -ERANGE; in nvmem_validate_keepouts()
797 if (!IS_ALIGNED(keepout->start, nvmem->stride) || in nvmem_validate_keepouts()
798 !IS_ALIGNED(keepout->end, nvmem->stride)) { in nvmem_validate_keepouts()
800 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
803 return -EINVAL; in nvmem_validate_keepouts()
806 cur = keepout->end; in nvmem_validate_keepouts()
813 static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) in nvmem_add_cells_from_dt() argument
815 struct device *dev = &nvmem->dev; in nvmem_add_cells_from_dt()
827 dev_err(dev, "nvmem: invalid reg on %pOF\n", child); in nvmem_add_cells_from_dt()
829 return -EINVAL; in nvmem_add_cells_from_dt()
841 dev_err(dev, "nvmem: invalid bits on %pOF\n", child); in nvmem_add_cells_from_dt()
843 return -EINVAL; in nvmem_add_cells_from_dt()
849 if (nvmem->fixup_dt_cell_info) in nvmem_add_cells_from_dt()
850 nvmem->fixup_dt_cell_info(nvmem, &info); in nvmem_add_cells_from_dt()
852 ret = nvmem_add_one_cell(nvmem, &info); in nvmem_add_cells_from_dt()
863 static int nvmem_add_cells_from_legacy_of(struct nvmem_device *nvmem) in nvmem_add_cells_from_legacy_of() argument
865 return nvmem_add_cells_from_dt(nvmem, nvmem->dev.of_node); in nvmem_add_cells_from_legacy_of()
868 static int nvmem_add_cells_from_fixed_layout(struct nvmem_device *nvmem) in nvmem_add_cells_from_fixed_layout() argument
873 layout_np = of_nvmem_layout_get_container(nvmem); in nvmem_add_cells_from_fixed_layout()
877 if (of_device_is_compatible(layout_np, "fixed-layout")) in nvmem_add_cells_from_fixed_layout()
878 err = nvmem_add_cells_from_dt(nvmem, layout_np); in nvmem_add_cells_from_fixed_layout()
889 if (!layout->add_cells) in nvmem_layout_register()
890 return -EINVAL; in nvmem_layout_register()
893 ret = layout->add_cells(layout); in nvmem_layout_register()
898 ret = nvmem_populate_sysfs_cells(layout->nvmem); in nvmem_layout_register()
900 nvmem_device_remove_all_cells(layout->nvmem); in nvmem_layout_register()
916 * nvmem_register() - Register a nvmem device for given nvmem_config.
917 * Also creates a binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
919 * @config: nvmem device configuration with which nvmem device is created.
927 struct nvmem_device *nvmem; in nvmem_register() local
930 if (!config->dev) in nvmem_register()
931 return ERR_PTR(-EINVAL); in nvmem_register()
933 if (!config->reg_read && !config->reg_write) in nvmem_register()
934 return ERR_PTR(-EINVAL); in nvmem_register()
936 nvmem = kzalloc(sizeof(*nvmem), GFP_KERNEL); in nvmem_register()
937 if (!nvmem) in nvmem_register()
938 return ERR_PTR(-ENOMEM); in nvmem_register()
942 kfree(nvmem); in nvmem_register()
946 nvmem->id = rval; in nvmem_register()
948 nvmem->dev.type = &nvmem_provider_type; in nvmem_register()
949 nvmem->dev.bus = &nvmem_bus_type; in nvmem_register()
950 nvmem->dev.parent = config->dev; in nvmem_register()
952 device_initialize(&nvmem->dev); in nvmem_register()
954 if (!config->ignore_wp) in nvmem_register()
955 nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp", in nvmem_register()
957 if (IS_ERR(nvmem->wp_gpio)) { in nvmem_register()
958 rval = PTR_ERR(nvmem->wp_gpio); in nvmem_register()
959 nvmem->wp_gpio = NULL; in nvmem_register()
963 kref_init(&nvmem->refcnt); in nvmem_register()
964 INIT_LIST_HEAD(&nvmem->cells); in nvmem_register()
965 nvmem->fixup_dt_cell_info = config->fixup_dt_cell_info; in nvmem_register()
967 nvmem->owner = config->owner; in nvmem_register()
968 if (!nvmem->owner && config->dev->driver) in nvmem_register()
969 nvmem->owner = config->dev->driver->owner; in nvmem_register()
970 nvmem->stride = config->stride ?: 1; in nvmem_register()
971 nvmem->word_size = config->word_size ?: 1; in nvmem_register()
972 nvmem->size = config->size; in nvmem_register()
973 nvmem->root_only = config->root_only; in nvmem_register()
974 nvmem->priv = config->priv; in nvmem_register()
975 nvmem->type = config->type; in nvmem_register()
976 nvmem->reg_read = config->reg_read; in nvmem_register()
977 nvmem->reg_write = config->reg_write; in nvmem_register()
978 nvmem->keepout = config->keepout; in nvmem_register()
979 nvmem->nkeepout = config->nkeepout; in nvmem_register()
980 if (config->of_node) in nvmem_register()
981 nvmem->dev.of_node = config->of_node; in nvmem_register()
983 nvmem->dev.of_node = config->dev->of_node; in nvmem_register()
985 switch (config->id) { in nvmem_register()
987 rval = dev_set_name(&nvmem->dev, "%s", config->name); in nvmem_register()
990 rval = dev_set_name(&nvmem->dev, "%s%d", config->name, nvmem->id); in nvmem_register()
993 rval = dev_set_name(&nvmem->dev, "%s%d", in nvmem_register()
994 config->name ? : "nvmem", in nvmem_register()
995 config->name ? config->id : nvmem->id); in nvmem_register()
1002 nvmem->read_only = device_property_present(config->dev, "read-only") || in nvmem_register()
1003 config->read_only || !nvmem->reg_write; in nvmem_register()
1006 nvmem->dev.groups = nvmem_dev_groups; in nvmem_register()
1009 if (nvmem->nkeepout) { in nvmem_register()
1010 rval = nvmem_validate_keepouts(nvmem); in nvmem_register()
1015 if (config->compat) { in nvmem_register()
1016 rval = nvmem_sysfs_setup_compat(nvmem, config); in nvmem_register()
1021 if (config->cells) { in nvmem_register()
1022 rval = nvmem_add_cells(nvmem, config->cells, config->ncells); in nvmem_register()
1027 rval = nvmem_add_cells_from_table(nvmem); in nvmem_register()
1031 if (config->add_legacy_fixed_of_cells) { in nvmem_register()
1032 rval = nvmem_add_cells_from_legacy_of(nvmem); in nvmem_register()
1037 rval = nvmem_add_cells_from_fixed_layout(nvmem); in nvmem_register()
1041 dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name); in nvmem_register()
1043 rval = device_add(&nvmem->dev); in nvmem_register()
1047 rval = nvmem_populate_layout(nvmem); in nvmem_register()
1052 rval = nvmem_populate_sysfs_cells(nvmem); in nvmem_register()
1057 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem); in nvmem_register()
1059 return nvmem; in nvmem_register()
1063 nvmem_destroy_layout(nvmem); in nvmem_register()
1066 device_del(&nvmem->dev); in nvmem_register()
1068 nvmem_device_remove_all_cells(nvmem); in nvmem_register()
1069 if (config->compat) in nvmem_register()
1070 nvmem_sysfs_remove_compat(nvmem, config); in nvmem_register()
1072 put_device(&nvmem->dev); in nvmem_register()
1080 struct nvmem_device *nvmem; in nvmem_device_release() local
1082 nvmem = container_of(kref, struct nvmem_device, refcnt); in nvmem_device_release()
1084 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_REMOVE, nvmem); in nvmem_device_release()
1086 if (nvmem->flags & FLAG_COMPAT) in nvmem_device_release()
1087 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_device_release()
1089 nvmem_device_remove_all_cells(nvmem); in nvmem_device_release()
1090 nvmem_destroy_layout(nvmem); in nvmem_device_release()
1091 device_unregister(&nvmem->dev); in nvmem_device_release()
1095 * nvmem_unregister() - Unregister previously registered nvmem device
1097 * @nvmem: Pointer to previously registered nvmem device.
1099 void nvmem_unregister(struct nvmem_device *nvmem) in nvmem_unregister() argument
1101 if (nvmem) in nvmem_unregister()
1102 kref_put(&nvmem->refcnt, nvmem_device_release); in nvmem_unregister()
1106 static void devm_nvmem_unregister(void *nvmem) in devm_nvmem_unregister() argument
1108 nvmem_unregister(nvmem); in devm_nvmem_unregister()
1112 * devm_nvmem_register() - Register a managed nvmem device for given
1114 * Also creates a binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
1116 * @dev: Device that uses the nvmem device.
1117 * @config: nvmem device configuration with which nvmem device is created.
1125 struct nvmem_device *nvmem; in devm_nvmem_register() local
1128 nvmem = nvmem_register(config); in devm_nvmem_register()
1129 if (IS_ERR(nvmem)) in devm_nvmem_register()
1130 return nvmem; in devm_nvmem_register()
1132 ret = devm_add_action_or_reset(dev, devm_nvmem_unregister, nvmem); in devm_nvmem_register()
1136 return nvmem; in devm_nvmem_register()
1143 struct nvmem_device *nvmem = NULL; in __nvmem_device_get() local
1149 nvmem = to_nvmem_device(dev); in __nvmem_device_get()
1151 if (!nvmem) in __nvmem_device_get()
1152 return ERR_PTR(-EPROBE_DEFER); in __nvmem_device_get()
1154 if (!try_module_get(nvmem->owner)) { in __nvmem_device_get()
1155 dev_err(&nvmem->dev, in __nvmem_device_get()
1156 "could not increase module refcount for cell %s\n", in __nvmem_device_get()
1157 nvmem_dev_name(nvmem)); in __nvmem_device_get()
1159 put_device(&nvmem->dev); in __nvmem_device_get()
1160 return ERR_PTR(-EINVAL); in __nvmem_device_get()
1163 kref_get(&nvmem->refcnt); in __nvmem_device_get()
1165 return nvmem; in __nvmem_device_get()
1168 static void __nvmem_device_put(struct nvmem_device *nvmem) in __nvmem_device_put() argument
1170 put_device(&nvmem->dev); in __nvmem_device_put()
1171 module_put(nvmem->owner); in __nvmem_device_put()
1172 kref_put(&nvmem->refcnt, nvmem_device_release); in __nvmem_device_put()
1177 * of_nvmem_device_get() - Get nvmem device from a given id
1179 * @np: Device tree node that uses the nvmem device.
1180 * @id: nvmem name from nvmem-names property.
1189 struct nvmem_device *nvmem; in of_nvmem_device_get() local
1193 index = of_property_match_string(np, "nvmem-names", id); in of_nvmem_device_get()
1195 nvmem_np = of_parse_phandle(np, "nvmem", index); in of_nvmem_device_get()
1197 return ERR_PTR(-ENOENT); in of_nvmem_device_get()
1199 nvmem = __nvmem_device_get(nvmem_np, device_match_of_node); in of_nvmem_device_get()
1201 return nvmem; in of_nvmem_device_get()
1207 * nvmem_device_get() - Get nvmem device from a given id
1209 * @dev: Device that uses the nvmem device.
1210 * @dev_name: name of the requested nvmem device.
1217 if (dev->of_node) { /* try dt first */ in nvmem_device_get()
1218 struct nvmem_device *nvmem; in nvmem_device_get() local
1220 nvmem = of_nvmem_device_get(dev->of_node, dev_name); in nvmem_device_get()
1222 if (!IS_ERR(nvmem) || PTR_ERR(nvmem) == -EPROBE_DEFER) in nvmem_device_get()
1223 return nvmem; in nvmem_device_get()
1232 * nvmem_device_find() - Find nvmem device with matching function
1249 struct nvmem_device **nvmem = res; in devm_nvmem_device_match() local
1251 if (WARN_ON(!nvmem || !*nvmem)) in devm_nvmem_device_match()
1254 return *nvmem == data; in devm_nvmem_device_match()
1263 * devm_nvmem_device_put() - put already got nvmem device
1265 * @dev: Device that uses the nvmem device.
1266 * @nvmem: pointer to nvmem device allocated by devm_nvmem_cell_get(),
1269 void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem) in devm_nvmem_device_put() argument
1274 devm_nvmem_device_match, nvmem); in devm_nvmem_device_put()
1281 * nvmem_device_put() - put already got nvmem device
1283 * @nvmem: pointer to nvmem device that needs to be released.
1285 void nvmem_device_put(struct nvmem_device *nvmem) in nvmem_device_put() argument
1287 __nvmem_device_put(nvmem); in nvmem_device_put()
1292 * devm_nvmem_device_get() - Get nvmem device of device form a given id
1294 * @dev: Device that requests the nvmem device.
1295 * @id: name id for the requested nvmem device.
1303 struct nvmem_device **ptr, *nvmem; in devm_nvmem_device_get() local
1307 return ERR_PTR(-ENOMEM); in devm_nvmem_device_get()
1309 nvmem = nvmem_device_get(dev, id); in devm_nvmem_device_get()
1310 if (!IS_ERR(nvmem)) { in devm_nvmem_device_get()
1311 *ptr = nvmem; in devm_nvmem_device_get()
1317 return nvmem; in devm_nvmem_device_get()
1324 struct nvmem_cell *cell; in nvmem_create_cell() local
1327 cell = kzalloc(sizeof(*cell), GFP_KERNEL); in nvmem_create_cell()
1328 if (!cell) in nvmem_create_cell()
1329 return ERR_PTR(-ENOMEM); in nvmem_create_cell()
1334 kfree(cell); in nvmem_create_cell()
1335 return ERR_PTR(-ENOMEM); in nvmem_create_cell()
1339 cell->id = name; in nvmem_create_cell()
1340 cell->entry = entry; in nvmem_create_cell()
1341 cell->index = index; in nvmem_create_cell()
1343 return cell; in nvmem_create_cell()
1350 struct nvmem_cell *cell = ERR_PTR(-ENOENT); in nvmem_cell_get_from_lookup() local
1352 struct nvmem_device *nvmem; in nvmem_cell_get_from_lookup() local
1356 return ERR_PTR(-EINVAL); in nvmem_cell_get_from_lookup()
1363 if ((strcmp(lookup->dev_id, dev_id) == 0) && in nvmem_cell_get_from_lookup()
1364 (strcmp(lookup->con_id, con_id) == 0)) { in nvmem_cell_get_from_lookup()
1366 nvmem = __nvmem_device_get((void *)lookup->nvmem_name, in nvmem_cell_get_from_lookup()
1368 if (IS_ERR(nvmem)) { in nvmem_cell_get_from_lookup()
1370 cell = ERR_CAST(nvmem); in nvmem_cell_get_from_lookup()
1374 cell_entry = nvmem_find_cell_entry_by_name(nvmem, in nvmem_cell_get_from_lookup()
1375 lookup->cell_name); in nvmem_cell_get_from_lookup()
1377 __nvmem_device_put(nvmem); in nvmem_cell_get_from_lookup()
1378 cell = ERR_PTR(-ENOENT); in nvmem_cell_get_from_lookup()
1380 cell = nvmem_create_cell(cell_entry, con_id, 0); in nvmem_cell_get_from_lookup()
1381 if (IS_ERR(cell)) in nvmem_cell_get_from_lookup()
1382 __nvmem_device_put(nvmem); in nvmem_cell_get_from_lookup()
1389 return cell; in nvmem_cell_get_from_lookup()
1392 static void nvmem_layout_module_put(struct nvmem_device *nvmem) in nvmem_layout_module_put() argument
1394 if (nvmem->layout && nvmem->layout->dev.driver) in nvmem_layout_module_put()
1395 module_put(nvmem->layout->dev.driver->owner); in nvmem_layout_module_put()
1400 nvmem_find_cell_entry_by_node(struct nvmem_device *nvmem, struct device_node *np) in nvmem_find_cell_entry_by_node() argument
1402 struct nvmem_cell_entry *iter, *cell = NULL; in nvmem_find_cell_entry_by_node() local
1405 list_for_each_entry(iter, &nvmem->cells, node) { in nvmem_find_cell_entry_by_node()
1406 if (np == iter->np) { in nvmem_find_cell_entry_by_node()
1407 cell = iter; in nvmem_find_cell_entry_by_node()
1413 return cell; in nvmem_find_cell_entry_by_node()
1416 static int nvmem_layout_module_get_optional(struct nvmem_device *nvmem) in nvmem_layout_module_get_optional() argument
1418 if (!nvmem->layout) in nvmem_layout_module_get_optional()
1421 if (!nvmem->layout->dev.driver || in nvmem_layout_module_get_optional()
1422 !try_module_get(nvmem->layout->dev.driver->owner)) in nvmem_layout_module_get_optional()
1423 return -EPROBE_DEFER; in nvmem_layout_module_get_optional()
1429 * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1431 * @np: Device tree node that uses the nvmem cell.
1432 * @id: nvmem cell name from nvmem-cell-names property, or NULL
1433 * for the cell at index 0 (the lone cell with no accompanying
1434 * nvmem-cell-names property).
1443 struct nvmem_device *nvmem; in of_nvmem_cell_get() local
1445 struct nvmem_cell *cell; in of_nvmem_cell_get() local
1451 /* if cell name exists, find index to the name */ in of_nvmem_cell_get()
1453 index = of_property_match_string(np, "nvmem-cell-names", id); in of_nvmem_cell_get()
1455 ret = of_parse_phandle_with_optional_args(np, "nvmem-cells", in of_nvmem_cell_get()
1456 "#nvmem-cell-cells", in of_nvmem_cell_get()
1459 return ERR_PTR(-ENOENT); in of_nvmem_cell_get()
1462 return ERR_PTR(-EINVAL); in of_nvmem_cell_get()
1471 return ERR_PTR(-EINVAL); in of_nvmem_cell_get()
1474 /* nvmem layouts produce cells within the nvmem-layout container */ in of_nvmem_cell_get()
1475 if (of_node_name_eq(nvmem_np, "nvmem-layout")) { in of_nvmem_cell_get()
1479 return ERR_PTR(-EINVAL); in of_nvmem_cell_get()
1483 nvmem = __nvmem_device_get(nvmem_np, device_match_of_node); in of_nvmem_cell_get()
1485 if (IS_ERR(nvmem)) { in of_nvmem_cell_get()
1487 return ERR_CAST(nvmem); in of_nvmem_cell_get()
1490 ret = nvmem_layout_module_get_optional(nvmem); in of_nvmem_cell_get()
1493 __nvmem_device_put(nvmem); in of_nvmem_cell_get()
1497 cell_entry = nvmem_find_cell_entry_by_node(nvmem, cell_np); in of_nvmem_cell_get()
1500 __nvmem_device_put(nvmem); in of_nvmem_cell_get()
1501 nvmem_layout_module_put(nvmem); in of_nvmem_cell_get()
1502 if (nvmem->layout) in of_nvmem_cell_get()
1503 return ERR_PTR(-EPROBE_DEFER); in of_nvmem_cell_get()
1505 return ERR_PTR(-ENOENT); in of_nvmem_cell_get()
1508 cell = nvmem_create_cell(cell_entry, id, cell_index); in of_nvmem_cell_get()
1509 if (IS_ERR(cell)) { in of_nvmem_cell_get()
1510 __nvmem_device_put(nvmem); in of_nvmem_cell_get()
1511 nvmem_layout_module_put(nvmem); in of_nvmem_cell_get()
1514 return cell; in of_nvmem_cell_get()
1520 * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1522 * @dev: Device that requests the nvmem cell.
1523 * @id: nvmem cell name to get (this corresponds with the name from the
1524 * nvmem-cell-names property for DT systems and with the con_id from
1525 * the lookup entry for non-DT systems).
1533 struct nvmem_cell *cell; in nvmem_cell_get() local
1535 if (dev->of_node) { /* try dt first */ in nvmem_cell_get()
1536 cell = of_nvmem_cell_get(dev->of_node, id); in nvmem_cell_get()
1537 if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER) in nvmem_cell_get()
1538 return cell; in nvmem_cell_get()
1541 /* NULL cell id only allowed for device tree; invalid otherwise */ in nvmem_cell_get()
1543 return ERR_PTR(-EINVAL); in nvmem_cell_get()
1555 * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1557 * @dev: Device that requests the nvmem cell.
1558 * @id: nvmem cell name id to get.
1566 struct nvmem_cell **ptr, *cell; in devm_nvmem_cell_get() local
1570 return ERR_PTR(-ENOMEM); in devm_nvmem_cell_get()
1572 cell = nvmem_cell_get(dev, id); in devm_nvmem_cell_get()
1573 if (!IS_ERR(cell)) { in devm_nvmem_cell_get()
1574 *ptr = cell; in devm_nvmem_cell_get()
1580 return cell; in devm_nvmem_cell_get()
1595 * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1598 * @dev: Device that requests the nvmem cell.
1599 * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1601 void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell) in devm_nvmem_cell_put() argument
1606 devm_nvmem_cell_match, cell); in devm_nvmem_cell_put()
1613 * nvmem_cell_put() - Release previously allocated nvmem cell.
1615 * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1617 void nvmem_cell_put(struct nvmem_cell *cell) in nvmem_cell_put() argument
1619 struct nvmem_device *nvmem = cell->entry->nvmem; in nvmem_cell_put() local
1621 if (cell->id) in nvmem_cell_put()
1622 kfree_const(cell->id); in nvmem_cell_put()
1624 kfree(cell); in nvmem_cell_put()
1625 __nvmem_device_put(nvmem); in nvmem_cell_put()
1626 nvmem_layout_module_put(nvmem); in nvmem_cell_put()
1630 static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell, void *buf) in nvmem_shift_read_buffer_in_place() argument
1633 int i, extra, bit_offset = cell->bit_offset; in nvmem_shift_read_buffer_in_place()
1641 for (i = 1; i < cell->bytes; i++) { in nvmem_shift_read_buffer_in_place()
1643 *p |= *b << (BITS_PER_BYTE - bit_offset); in nvmem_shift_read_buffer_in_place()
1650 p += cell->bytes - 1; in nvmem_shift_read_buffer_in_place()
1654 extra = cell->bytes - DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE); in nvmem_shift_read_buffer_in_place()
1655 while (--extra >= 0) in nvmem_shift_read_buffer_in_place()
1656 *p-- = 0; in nvmem_shift_read_buffer_in_place()
1659 if (cell->nbits % BITS_PER_BYTE) in nvmem_shift_read_buffer_in_place()
1660 *p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0); in nvmem_shift_read_buffer_in_place()
1663 static int __nvmem_cell_read(struct nvmem_device *nvmem, in __nvmem_cell_read() argument
1664 struct nvmem_cell_entry *cell, in __nvmem_cell_read() argument
1669 rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len); in __nvmem_cell_read()
1674 /* shift bits in-place */ in __nvmem_cell_read()
1675 if (cell->bit_offset || cell->nbits) in __nvmem_cell_read()
1676 nvmem_shift_read_buffer_in_place(cell, buf); in __nvmem_cell_read()
1678 if (cell->read_post_process) { in __nvmem_cell_read()
1679 rc = cell->read_post_process(cell->priv, id, index, in __nvmem_cell_read()
1680 cell->offset, buf, cell->raw_len); in __nvmem_cell_read()
1686 *len = cell->bytes; in __nvmem_cell_read()
1692 * nvmem_cell_read() - Read a given nvmem cell
1694 * @cell: nvmem cell to be read.
1695 * @len: pointer to length of cell which will be populated on successful read;
1701 void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len) in nvmem_cell_read() argument
1703 struct nvmem_cell_entry *entry = cell->entry; in nvmem_cell_read()
1704 struct nvmem_device *nvmem = entry->nvmem; in nvmem_cell_read() local
1708 if (!nvmem) in nvmem_cell_read()
1709 return ERR_PTR(-EINVAL); in nvmem_cell_read()
1711 buf = kzalloc(max_t(size_t, entry->raw_len, entry->bytes), GFP_KERNEL); in nvmem_cell_read()
1713 return ERR_PTR(-ENOMEM); in nvmem_cell_read()
1715 rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index); in nvmem_cell_read()
1725 static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell, in nvmem_cell_prepare_write_buffer() argument
1728 struct nvmem_device *nvmem = cell->nvmem; in nvmem_cell_prepare_write_buffer() local
1729 int i, rc, nbits, bit_offset = cell->bit_offset; in nvmem_cell_prepare_write_buffer()
1732 nbits = cell->nbits; in nvmem_cell_prepare_write_buffer()
1733 buf = kzalloc(cell->bytes, GFP_KERNEL); in nvmem_cell_prepare_write_buffer()
1735 return ERR_PTR(-ENOMEM); in nvmem_cell_prepare_write_buffer()
1744 /* setup the first byte with lsb bits from nvmem */ in nvmem_cell_prepare_write_buffer()
1745 rc = nvmem_reg_read(nvmem, cell->offset, &v, 1); in nvmem_cell_prepare_write_buffer()
1748 *b++ |= GENMASK(bit_offset - 1, 0) & v; in nvmem_cell_prepare_write_buffer()
1751 for (i = 1; i < cell->bytes; i++) { in nvmem_cell_prepare_write_buffer()
1753 pbits = pbyte >> (BITS_PER_BYTE - 1 - bit_offset); in nvmem_cell_prepare_write_buffer()
1763 /* setup the last byte with msb bits from nvmem */ in nvmem_cell_prepare_write_buffer()
1764 rc = nvmem_reg_read(nvmem, in nvmem_cell_prepare_write_buffer()
1765 cell->offset + cell->bytes - 1, &v, 1); in nvmem_cell_prepare_write_buffer()
1778 static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, size_t len) in __nvmem_cell_entry_write() argument
1780 struct nvmem_device *nvmem = cell->nvmem; in __nvmem_cell_entry_write() local
1783 if (!nvmem || nvmem->read_only || in __nvmem_cell_entry_write()
1784 (cell->bit_offset == 0 && len != cell->bytes)) in __nvmem_cell_entry_write()
1785 return -EINVAL; in __nvmem_cell_entry_write()
1788 * Any cells which have a read_post_process hook are read-only because in __nvmem_cell_entry_write()
1792 if (cell->read_post_process) in __nvmem_cell_entry_write()
1793 return -EINVAL; in __nvmem_cell_entry_write()
1795 if (cell->bit_offset || cell->nbits) { in __nvmem_cell_entry_write()
1796 if (len != BITS_TO_BYTES(cell->nbits) && len != cell->bytes) in __nvmem_cell_entry_write()
1797 return -EINVAL; in __nvmem_cell_entry_write()
1798 buf = nvmem_cell_prepare_write_buffer(cell, buf, len); in __nvmem_cell_entry_write()
1803 rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes); in __nvmem_cell_entry_write()
1806 if (cell->bit_offset || cell->nbits) in __nvmem_cell_entry_write()
1816 * nvmem_cell_write() - Write to a given nvmem cell
1818 * @cell: nvmem cell to be written.
1820 * @len: length of buffer to be written to nvmem cell.
1824 int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len) in nvmem_cell_write() argument
1826 return __nvmem_cell_entry_write(cell->entry, buf, len); in nvmem_cell_write()
1834 struct nvmem_cell *cell; in nvmem_cell_read_common() local
1838 cell = nvmem_cell_get(dev, cell_id); in nvmem_cell_read_common()
1839 if (IS_ERR(cell)) in nvmem_cell_read_common()
1840 return PTR_ERR(cell); in nvmem_cell_read_common()
1842 buf = nvmem_cell_read(cell, &len); in nvmem_cell_read_common()
1844 nvmem_cell_put(cell); in nvmem_cell_read_common()
1849 nvmem_cell_put(cell); in nvmem_cell_read_common()
1850 return -EINVAL; in nvmem_cell_read_common()
1854 nvmem_cell_put(cell); in nvmem_cell_read_common()
1860 * nvmem_cell_read_u8() - Read a cell value as a u8
1862 * @dev: Device that requests the nvmem cell.
1863 * @cell_id: Name of nvmem cell to read.
1875 * nvmem_cell_read_u16() - Read a cell value as a u16
1877 * @dev: Device that requests the nvmem cell.
1878 * @cell_id: Name of nvmem cell to read.
1890 * nvmem_cell_read_u32() - Read a cell value as a u32
1892 * @dev: Device that requests the nvmem cell.
1893 * @cell_id: Name of nvmem cell to read.
1905 * nvmem_cell_read_u64() - Read a cell value as a u64
1907 * @dev: Device that requests the nvmem cell.
1908 * @cell_id: Name of nvmem cell to read.
1923 struct nvmem_cell *cell; in nvmem_cell_read_variable_common() local
1927 cell = nvmem_cell_get(dev, cell_id); in nvmem_cell_read_variable_common()
1928 if (IS_ERR(cell)) in nvmem_cell_read_variable_common()
1929 return cell; in nvmem_cell_read_variable_common()
1931 nbits = cell->entry->nbits; in nvmem_cell_read_variable_common()
1932 buf = nvmem_cell_read(cell, len); in nvmem_cell_read_variable_common()
1933 nvmem_cell_put(cell); in nvmem_cell_read_variable_common()
1946 return ERR_PTR(-ERANGE); in nvmem_cell_read_variable_common()
1953 * nvmem_cell_read_variable_le_u32() - Read up to 32-bits of data as a little endian number.
1955 * @dev: Device that requests the nvmem cell.
1956 * @cell_id: Name of nvmem cell to read.
1984 * nvmem_cell_read_variable_le_u64() - Read up to 64-bits of data as a little endian number.
1986 * @dev: Device that requests the nvmem cell.
1987 * @cell_id: Name of nvmem cell to read.
2015 * nvmem_device_cell_read() - Read a given nvmem device and cell
2017 * @nvmem: nvmem device to read from.
2018 * @info: nvmem cell info to be read.
2024 ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem, in nvmem_device_cell_read() argument
2027 struct nvmem_cell_entry cell; in nvmem_device_cell_read() local
2031 if (!nvmem) in nvmem_device_cell_read()
2032 return -EINVAL; in nvmem_device_cell_read()
2034 rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell); in nvmem_device_cell_read()
2038 rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0); in nvmem_device_cell_read()
2047 * nvmem_device_cell_write() - Write cell to a given nvmem device
2049 * @nvmem: nvmem device to be written to.
2050 * @info: nvmem cell info to be written.
2051 * @buf: buffer to be written to cell.
2055 int nvmem_device_cell_write(struct nvmem_device *nvmem, in nvmem_device_cell_write() argument
2058 struct nvmem_cell_entry cell; in nvmem_device_cell_write() local
2061 if (!nvmem) in nvmem_device_cell_write()
2062 return -EINVAL; in nvmem_device_cell_write()
2064 rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell); in nvmem_device_cell_write()
2068 return __nvmem_cell_entry_write(&cell, buf, cell.bytes); in nvmem_device_cell_write()
2073 * nvmem_device_read() - Read from a given nvmem device
2075 * @nvmem: nvmem device to read from.
2076 * @offset: offset in nvmem device.
2083 int nvmem_device_read(struct nvmem_device *nvmem, in nvmem_device_read() argument
2089 if (!nvmem) in nvmem_device_read()
2090 return -EINVAL; in nvmem_device_read()
2092 rc = nvmem_reg_read(nvmem, offset, buf, bytes); in nvmem_device_read()
2102 * nvmem_device_write() - Write cell to a given nvmem device
2104 * @nvmem: nvmem device to be written to.
2105 * @offset: offset in nvmem device.
2111 int nvmem_device_write(struct nvmem_device *nvmem, in nvmem_device_write() argument
2117 if (!nvmem) in nvmem_device_write()
2118 return -EINVAL; in nvmem_device_write()
2120 rc = nvmem_reg_write(nvmem, offset, buf, bytes); in nvmem_device_write()
2131 * nvmem_add_cell_table() - register a table of cell info entries
2133 * @table: table of cell info entries
2138 list_add_tail(&table->node, &nvmem_cell_tables); in nvmem_add_cell_table()
2144 * nvmem_del_cell_table() - remove a previously registered cell info table
2146 * @table: table of cell info entries
2151 list_del(&table->node); in nvmem_del_cell_table()
2157 * nvmem_add_cell_lookups() - register a list of cell lookup entries
2159 * @entries: array of cell lookup entries
2160 * @nentries: number of cell lookup entries in the array
2174 * nvmem_del_cell_lookups() - remove a list of previously added cell lookup
2177 * @entries: array of cell lookup entries
2178 * @nentries: number of cell lookup entries in the array
2192 * nvmem_dev_name() - Get the name of a given nvmem device.
2194 * @nvmem: nvmem device.
2196 * Return: name of the nvmem device.
2198 const char *nvmem_dev_name(struct nvmem_device *nvmem) in nvmem_dev_name() argument
2200 return dev_name(&nvmem->dev); in nvmem_dev_name()
2205 * nvmem_dev_size() - Get the size of a given nvmem device.
2207 * @nvmem: nvmem device.
2209 * Return: size of the nvmem device.
2211 size_t nvmem_dev_size(struct nvmem_device *nvmem) in nvmem_dev_size() argument
2213 return nvmem->size; in nvmem_dev_size()
2242 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com");
2243 MODULE_DESCRIPTION("nvmem Driver Core");