Lines Matching full:nvmem
3 * nvmem framework core.
16 #include <linux/nvmem-consumer.h>
17 #include <linux/nvmem-provider.h>
37 struct nvmem_device *nvmem; member
61 static int __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, in __nvmem_reg_read() argument
64 if (nvmem->reg_read) in __nvmem_reg_read()
65 return nvmem->reg_read(nvmem->priv, offset, val, bytes); in __nvmem_reg_read()
70 static int __nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, in __nvmem_reg_write() argument
75 if (nvmem->reg_write) { in __nvmem_reg_write()
76 gpiod_set_value_cansleep(nvmem->wp_gpio, 0); in __nvmem_reg_write()
77 ret = nvmem->reg_write(nvmem->priv, offset, val, bytes); in __nvmem_reg_write()
78 gpiod_set_value_cansleep(nvmem->wp_gpio, 1); in __nvmem_reg_write()
85 static int nvmem_access_with_keepouts(struct nvmem_device *nvmem, in nvmem_access_with_keepouts() argument
92 const struct nvmem_keepout *keepout = nvmem->keepout; in nvmem_access_with_keepouts()
93 const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; in nvmem_access_with_keepouts()
109 rc = __nvmem_reg_write(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
111 rc = __nvmem_reg_read(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
141 return __nvmem_reg_write(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
143 return __nvmem_reg_read(nvmem, offset, val, ksize); in nvmem_access_with_keepouts()
149 static int nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, in nvmem_reg_read() argument
152 if (!nvmem->nkeepout) in nvmem_reg_read()
153 return __nvmem_reg_read(nvmem, offset, val, bytes); in nvmem_reg_read()
155 return nvmem_access_with_keepouts(nvmem, offset, val, bytes, false); in nvmem_reg_read()
158 static int nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, in nvmem_reg_write() argument
161 if (!nvmem->nkeepout) in nvmem_reg_write()
162 return __nvmem_reg_write(nvmem, offset, val, bytes); in nvmem_reg_write()
164 return nvmem_access_with_keepouts(nvmem, offset, val, bytes, true); in nvmem_reg_write()
183 struct nvmem_device *nvmem = to_nvmem_device(dev); in type_show() local
185 return sprintf(buf, "%s\n", nvmem_type_str[nvmem->type]); in type_show()
200 struct nvmem_device *nvmem; in bin_attr_nvmem_read() local
207 nvmem = to_nvmem_device(dev); in bin_attr_nvmem_read()
210 if (pos >= nvmem->size) in bin_attr_nvmem_read()
213 if (!IS_ALIGNED(pos, nvmem->stride)) in bin_attr_nvmem_read()
216 if (count < nvmem->word_size) in bin_attr_nvmem_read()
219 if (pos + count > nvmem->size) in bin_attr_nvmem_read()
220 count = nvmem->size - pos; in bin_attr_nvmem_read()
222 count = round_down(count, nvmem->word_size); in bin_attr_nvmem_read()
224 if (!nvmem->reg_read) in bin_attr_nvmem_read()
227 rc = nvmem_reg_read(nvmem, pos, buf, count); in bin_attr_nvmem_read()
240 struct nvmem_device *nvmem; in bin_attr_nvmem_write() local
247 nvmem = to_nvmem_device(dev); in bin_attr_nvmem_write()
250 if (pos >= nvmem->size) in bin_attr_nvmem_write()
253 if (!IS_ALIGNED(pos, nvmem->stride)) in bin_attr_nvmem_write()
256 if (count < nvmem->word_size) in bin_attr_nvmem_write()
259 if (pos + count > nvmem->size) in bin_attr_nvmem_write()
260 count = nvmem->size - pos; in bin_attr_nvmem_write()
262 count = round_down(count, nvmem->word_size); in bin_attr_nvmem_write()
264 if (!nvmem->reg_write) in bin_attr_nvmem_write()
267 rc = nvmem_reg_write(nvmem, pos, buf, count); in bin_attr_nvmem_write()
275 static umode_t nvmem_bin_attr_get_umode(struct nvmem_device *nvmem) in nvmem_bin_attr_get_umode() argument
279 if (!nvmem->root_only) in nvmem_bin_attr_get_umode()
282 if (!nvmem->read_only) in nvmem_bin_attr_get_umode()
285 if (!nvmem->reg_write) in nvmem_bin_attr_get_umode()
288 if (!nvmem->reg_read) in nvmem_bin_attr_get_umode()
298 struct nvmem_device *nvmem = to_nvmem_device(dev); in nvmem_bin_attr_is_visible() local
300 attr->size = nvmem->size; in nvmem_bin_attr_is_visible()
302 return nvmem_bin_attr_get_umode(nvmem); in nvmem_bin_attr_is_visible()
308 .name = "nvmem",
344 static int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem, in nvmem_sysfs_setup_compat() argument
355 nvmem->eeprom = bin_attr_nvmem_eeprom_compat; in nvmem_sysfs_setup_compat()
357 nvmem->eeprom.attr.name = "fram"; in nvmem_sysfs_setup_compat()
358 nvmem->eeprom.attr.mode = nvmem_bin_attr_get_umode(nvmem); in nvmem_sysfs_setup_compat()
359 nvmem->eeprom.size = nvmem->size; in nvmem_sysfs_setup_compat()
361 nvmem->eeprom.attr.key = &eeprom_lock_key; in nvmem_sysfs_setup_compat()
363 nvmem->eeprom.private = &nvmem->dev; in nvmem_sysfs_setup_compat()
364 nvmem->base_dev = config->base_dev; in nvmem_sysfs_setup_compat()
366 rval = device_create_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_sysfs_setup_compat()
368 dev_err(&nvmem->dev, in nvmem_sysfs_setup_compat()
373 nvmem->flags |= FLAG_COMPAT; in nvmem_sysfs_setup_compat()
378 static void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem, in nvmem_sysfs_remove_compat() argument
382 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_sysfs_remove_compat()
387 static int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem, in nvmem_sysfs_setup_compat() argument
392 static void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem, in nvmem_sysfs_remove_compat() argument
401 struct nvmem_device *nvmem = to_nvmem_device(dev); in nvmem_release() local
403 ida_free(&nvmem_ida, nvmem->id); in nvmem_release()
404 gpiod_put(nvmem->wp_gpio); in nvmem_release()
405 kfree(nvmem); in nvmem_release()
413 .name = "nvmem",
427 static void nvmem_device_remove_all_cells(const struct nvmem_device *nvmem) in nvmem_device_remove_all_cells() argument
431 list_for_each_entry_safe(cell, p, &nvmem->cells, node) in nvmem_device_remove_all_cells()
438 list_add_tail(&cell->node, &cell->nvmem->cells); in nvmem_cell_entry_add()
443 static int nvmem_cell_info_to_nvmem_cell_entry_nodup(struct nvmem_device *nvmem, in nvmem_cell_info_to_nvmem_cell_entry_nodup() argument
447 cell->nvmem = nvmem; in nvmem_cell_info_to_nvmem_cell_entry_nodup()
462 cell->raw_len = ALIGN(cell->bytes, nvmem->word_size); in nvmem_cell_info_to_nvmem_cell_entry_nodup()
465 if (!IS_ALIGNED(cell->offset, nvmem->stride)) { in nvmem_cell_info_to_nvmem_cell_entry_nodup()
466 dev_err(&nvmem->dev, in nvmem_cell_info_to_nvmem_cell_entry_nodup()
467 "cell %s unaligned to nvmem stride %d\n", in nvmem_cell_info_to_nvmem_cell_entry_nodup()
468 cell->name ?: "<unknown>", nvmem->stride); in nvmem_cell_info_to_nvmem_cell_entry_nodup()
472 if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) { in nvmem_cell_info_to_nvmem_cell_entry_nodup()
473 dev_err(&nvmem->dev, in nvmem_cell_info_to_nvmem_cell_entry_nodup()
474 "cell %s raw len %zd unaligned to nvmem word size %d\n", in nvmem_cell_info_to_nvmem_cell_entry_nodup()
476 nvmem->word_size); in nvmem_cell_info_to_nvmem_cell_entry_nodup()
481 cell->raw_len = ALIGN(cell->raw_len, nvmem->word_size); in nvmem_cell_info_to_nvmem_cell_entry_nodup()
487 static int nvmem_cell_info_to_nvmem_cell_entry(struct nvmem_device *nvmem, in nvmem_cell_info_to_nvmem_cell_entry() argument
493 err = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, cell); in nvmem_cell_info_to_nvmem_cell_entry()
505 * nvmem_add_one_cell() - Add one cell information to an nvmem device
507 * @nvmem: nvmem device to add cells to.
508 * @info: nvmem cell info to add to the device
512 int nvmem_add_one_cell(struct nvmem_device *nvmem, in nvmem_add_one_cell() argument
522 rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell); in nvmem_add_one_cell()
535 * nvmem_add_cells() - Add cell information to an nvmem device
537 * @nvmem: nvmem device to add cells to.
538 * @info: nvmem cell info to add to the device
543 static int nvmem_add_cells(struct nvmem_device *nvmem, in nvmem_add_cells() argument
550 rval = nvmem_add_one_cell(nvmem, &info[i]); in nvmem_add_cells()
559 * nvmem_register_notifier() - Register a notifier block for nvmem events.
561 * @nb: notifier block to be called on nvmem events.
572 * nvmem_unregister_notifier() - Unregister a notifier block for nvmem events.
584 static int nvmem_add_cells_from_table(struct nvmem_device *nvmem) in nvmem_add_cells_from_table() argument
593 if (strcmp(nvmem_dev_name(nvmem), table->nvmem_name) == 0) { in nvmem_add_cells_from_table()
603 rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell); in nvmem_add_cells_from_table()
620 nvmem_find_cell_entry_by_name(struct nvmem_device *nvmem, const char *cell_id) in nvmem_find_cell_entry_by_name() argument
625 list_for_each_entry(iter, &nvmem->cells, node) { in nvmem_find_cell_entry_by_name()
636 static int nvmem_validate_keepouts(struct nvmem_device *nvmem) in nvmem_validate_keepouts() argument
639 const struct nvmem_keepout *keepout = nvmem->keepout; in nvmem_validate_keepouts()
640 const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; in nvmem_validate_keepouts()
645 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
652 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
662 if ((keepout->end - keepout->start < nvmem->word_size) || in nvmem_validate_keepouts()
664 (keepout->start - cur < nvmem->word_size))) { in nvmem_validate_keepouts()
666 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
673 if (!IS_ALIGNED(keepout->start, nvmem->stride) || in nvmem_validate_keepouts()
674 !IS_ALIGNED(keepout->end, nvmem->stride)) { in nvmem_validate_keepouts()
676 dev_err(&nvmem->dev, in nvmem_validate_keepouts()
689 static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) in nvmem_add_cells_from_dt() argument
691 struct device *dev = &nvmem->dev; in nvmem_add_cells_from_dt()
703 dev_err(dev, "nvmem: invalid reg on %pOF\n", child); in nvmem_add_cells_from_dt()
720 if (nvmem->fixup_dt_cell_info) in nvmem_add_cells_from_dt()
721 nvmem->fixup_dt_cell_info(nvmem, &info); in nvmem_add_cells_from_dt()
723 ret = nvmem_add_one_cell(nvmem, &info); in nvmem_add_cells_from_dt()
734 static int nvmem_add_cells_from_legacy_of(struct nvmem_device *nvmem) in nvmem_add_cells_from_legacy_of() argument
736 return nvmem_add_cells_from_dt(nvmem, nvmem->dev.of_node); in nvmem_add_cells_from_legacy_of()
739 static int nvmem_add_cells_from_fixed_layout(struct nvmem_device *nvmem) in nvmem_add_cells_from_fixed_layout() argument
744 layout_np = of_nvmem_layout_get_container(nvmem); in nvmem_add_cells_from_fixed_layout()
749 err = nvmem_add_cells_from_dt(nvmem, layout_np); in nvmem_add_cells_from_fixed_layout()
780 static struct nvmem_layout *nvmem_layout_get(struct nvmem_device *nvmem) in nvmem_layout_get() argument
785 layout_np = of_nvmem_layout_get_container(nvmem); in nvmem_layout_get()
796 * In case the nvmem device was built-in while the layout was built as a in nvmem_layout_get()
825 static int nvmem_add_cells_from_layout(struct nvmem_device *nvmem) in nvmem_add_cells_from_layout() argument
827 struct nvmem_layout *layout = nvmem->layout; in nvmem_add_cells_from_layout()
831 ret = layout->add_cells(&nvmem->dev, nvmem); in nvmem_add_cells_from_layout()
843 * @nvmem: nvmem device.
848 struct device_node *of_nvmem_layout_get_container(struct nvmem_device *nvmem) in of_nvmem_layout_get_container() argument
850 return of_get_child_by_name(nvmem->dev.of_node, "nvmem-layout"); in of_nvmem_layout_get_container()
855 const void *nvmem_layout_get_match_data(struct nvmem_device *nvmem, in nvmem_layout_get_match_data() argument
861 layout_np = of_nvmem_layout_get_container(nvmem); in nvmem_layout_get_match_data()
869 * nvmem_register() - Register a nvmem device for given nvmem_config.
870 * Also creates a binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
872 * @config: nvmem device configuration with which nvmem device is created.
880 struct nvmem_device *nvmem; in nvmem_register() local
889 nvmem = kzalloc(sizeof(*nvmem), GFP_KERNEL); in nvmem_register()
890 if (!nvmem) in nvmem_register()
895 kfree(nvmem); in nvmem_register()
899 nvmem->id = rval; in nvmem_register()
901 nvmem->dev.type = &nvmem_provider_type; in nvmem_register()
902 nvmem->dev.bus = &nvmem_bus_type; in nvmem_register()
903 nvmem->dev.parent = config->dev; in nvmem_register()
905 device_initialize(&nvmem->dev); in nvmem_register()
908 nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp", in nvmem_register()
910 if (IS_ERR(nvmem->wp_gpio)) { in nvmem_register()
911 rval = PTR_ERR(nvmem->wp_gpio); in nvmem_register()
912 nvmem->wp_gpio = NULL; in nvmem_register()
916 kref_init(&nvmem->refcnt); in nvmem_register()
917 INIT_LIST_HEAD(&nvmem->cells); in nvmem_register()
918 nvmem->fixup_dt_cell_info = config->fixup_dt_cell_info; in nvmem_register()
920 nvmem->owner = config->owner; in nvmem_register()
921 if (!nvmem->owner && config->dev->driver) in nvmem_register()
922 nvmem->owner = config->dev->driver->owner; in nvmem_register()
923 nvmem->stride = config->stride ?: 1; in nvmem_register()
924 nvmem->word_size = config->word_size ?: 1; in nvmem_register()
925 nvmem->size = config->size; in nvmem_register()
926 nvmem->root_only = config->root_only; in nvmem_register()
927 nvmem->priv = config->priv; in nvmem_register()
928 nvmem->type = config->type; in nvmem_register()
929 nvmem->reg_read = config->reg_read; in nvmem_register()
930 nvmem->reg_write = config->reg_write; in nvmem_register()
931 nvmem->keepout = config->keepout; in nvmem_register()
932 nvmem->nkeepout = config->nkeepout; in nvmem_register()
934 nvmem->dev.of_node = config->of_node; in nvmem_register()
936 nvmem->dev.of_node = config->dev->of_node; in nvmem_register()
940 rval = dev_set_name(&nvmem->dev, "%s", config->name); in nvmem_register()
943 rval = dev_set_name(&nvmem->dev, "%s%d", config->name, nvmem->id); in nvmem_register()
946 rval = dev_set_name(&nvmem->dev, "%s%d", in nvmem_register()
947 config->name ? : "nvmem", in nvmem_register()
948 config->name ? config->id : nvmem->id); in nvmem_register()
955 nvmem->read_only = device_property_present(config->dev, "read-only") || in nvmem_register()
956 config->read_only || !nvmem->reg_write; in nvmem_register()
959 nvmem->dev.groups = nvmem_dev_groups; in nvmem_register()
962 if (nvmem->nkeepout) { in nvmem_register()
963 rval = nvmem_validate_keepouts(nvmem); in nvmem_register()
969 rval = nvmem_sysfs_setup_compat(nvmem, config); in nvmem_register()
978 nvmem->layout = config->layout ?: nvmem_layout_get(nvmem); in nvmem_register()
979 if (IS_ERR(nvmem->layout)) { in nvmem_register()
980 rval = PTR_ERR(nvmem->layout); in nvmem_register()
981 nvmem->layout = NULL; in nvmem_register()
988 rval = nvmem_add_cells(nvmem, config->cells, config->ncells); in nvmem_register()
993 rval = nvmem_add_cells_from_table(nvmem); in nvmem_register()
998 rval = nvmem_add_cells_from_legacy_of(nvmem); in nvmem_register()
1003 rval = nvmem_add_cells_from_fixed_layout(nvmem); in nvmem_register()
1007 rval = nvmem_add_cells_from_layout(nvmem); in nvmem_register()
1011 dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name); in nvmem_register()
1013 rval = device_add(&nvmem->dev); in nvmem_register()
1017 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem); in nvmem_register()
1019 return nvmem; in nvmem_register()
1022 nvmem_device_remove_all_cells(nvmem); in nvmem_register()
1023 nvmem_layout_put(nvmem->layout); in nvmem_register()
1026 nvmem_sysfs_remove_compat(nvmem, config); in nvmem_register()
1028 put_device(&nvmem->dev); in nvmem_register()
1036 struct nvmem_device *nvmem; in nvmem_device_release() local
1038 nvmem = container_of(kref, struct nvmem_device, refcnt); in nvmem_device_release()
1040 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_REMOVE, nvmem); in nvmem_device_release()
1042 if (nvmem->flags & FLAG_COMPAT) in nvmem_device_release()
1043 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); in nvmem_device_release()
1045 nvmem_device_remove_all_cells(nvmem); in nvmem_device_release()
1046 nvmem_layout_put(nvmem->layout); in nvmem_device_release()
1047 device_unregister(&nvmem->dev); in nvmem_device_release()
1051 * nvmem_unregister() - Unregister previously registered nvmem device
1053 * @nvmem: Pointer to previously registered nvmem device.
1055 void nvmem_unregister(struct nvmem_device *nvmem) in nvmem_unregister() argument
1057 if (nvmem) in nvmem_unregister()
1058 kref_put(&nvmem->refcnt, nvmem_device_release); in nvmem_unregister()
1062 static void devm_nvmem_unregister(void *nvmem) in devm_nvmem_unregister() argument
1064 nvmem_unregister(nvmem); in devm_nvmem_unregister()
1068 * devm_nvmem_register() - Register a managed nvmem device for given
1070 * Also creates a binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
1072 * @dev: Device that uses the nvmem device.
1073 * @config: nvmem device configuration with which nvmem device is created.
1081 struct nvmem_device *nvmem; in devm_nvmem_register() local
1084 nvmem = nvmem_register(config); in devm_nvmem_register()
1085 if (IS_ERR(nvmem)) in devm_nvmem_register()
1086 return nvmem; in devm_nvmem_register()
1088 ret = devm_add_action_or_reset(dev, devm_nvmem_unregister, nvmem); in devm_nvmem_register()
1092 return nvmem; in devm_nvmem_register()
1099 struct nvmem_device *nvmem = NULL; in __nvmem_device_get() local
1105 nvmem = to_nvmem_device(dev); in __nvmem_device_get()
1107 if (!nvmem) in __nvmem_device_get()
1110 if (!try_module_get(nvmem->owner)) { in __nvmem_device_get()
1111 dev_err(&nvmem->dev, in __nvmem_device_get()
1113 nvmem_dev_name(nvmem)); in __nvmem_device_get()
1115 put_device(&nvmem->dev); in __nvmem_device_get()
1119 kref_get(&nvmem->refcnt); in __nvmem_device_get()
1121 return nvmem; in __nvmem_device_get()
1124 static void __nvmem_device_put(struct nvmem_device *nvmem) in __nvmem_device_put() argument
1126 put_device(&nvmem->dev); in __nvmem_device_put()
1127 module_put(nvmem->owner); in __nvmem_device_put()
1128 kref_put(&nvmem->refcnt, nvmem_device_release); in __nvmem_device_put()
1133 * of_nvmem_device_get() - Get nvmem device from a given id
1135 * @np: Device tree node that uses the nvmem device.
1136 * @id: nvmem name from nvmem-names property.
1145 struct nvmem_device *nvmem; in of_nvmem_device_get() local
1149 index = of_property_match_string(np, "nvmem-names", id); in of_nvmem_device_get()
1151 nvmem_np = of_parse_phandle(np, "nvmem", index); in of_nvmem_device_get()
1155 nvmem = __nvmem_device_get(nvmem_np, device_match_of_node); in of_nvmem_device_get()
1157 return nvmem; in of_nvmem_device_get()
1163 * nvmem_device_get() - Get nvmem device from a given id
1165 * @dev: Device that uses the nvmem device.
1166 * @dev_name: name of the requested nvmem device.
1174 struct nvmem_device *nvmem; in nvmem_device_get() local
1176 nvmem = of_nvmem_device_get(dev->of_node, dev_name); in nvmem_device_get()
1178 if (!IS_ERR(nvmem) || PTR_ERR(nvmem) == -EPROBE_DEFER) in nvmem_device_get()
1179 return nvmem; in nvmem_device_get()
1188 * nvmem_device_find() - Find nvmem device with matching function
1205 struct nvmem_device **nvmem = res; in devm_nvmem_device_match() local
1207 if (WARN_ON(!nvmem || !*nvmem)) in devm_nvmem_device_match()
1210 return *nvmem == data; in devm_nvmem_device_match()
1219 * devm_nvmem_device_put() - put alredy got nvmem device
1221 * @dev: Device that uses the nvmem device.
1222 * @nvmem: pointer to nvmem device allocated by devm_nvmem_cell_get(),
1225 void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem) in devm_nvmem_device_put() argument
1230 devm_nvmem_device_match, nvmem); in devm_nvmem_device_put()
1237 * nvmem_device_put() - put alredy got nvmem device
1239 * @nvmem: pointer to nvmem device that needs to be released.
1241 void nvmem_device_put(struct nvmem_device *nvmem) in nvmem_device_put() argument
1243 __nvmem_device_put(nvmem); in nvmem_device_put()
1248 * devm_nvmem_device_get() - Get nvmem device of device form a given id
1250 * @dev: Device that requests the nvmem device.
1251 * @id: name id for the requested nvmem device.
1259 struct nvmem_device **ptr, *nvmem; in devm_nvmem_device_get() local
1265 nvmem = nvmem_device_get(dev, id); in devm_nvmem_device_get()
1266 if (!IS_ERR(nvmem)) { in devm_nvmem_device_get()
1267 *ptr = nvmem; in devm_nvmem_device_get()
1273 return nvmem; in devm_nvmem_device_get()
1308 struct nvmem_device *nvmem; in nvmem_cell_get_from_lookup() local
1322 nvmem = __nvmem_device_get((void *)lookup->nvmem_name, in nvmem_cell_get_from_lookup()
1324 if (IS_ERR(nvmem)) { in nvmem_cell_get_from_lookup()
1326 cell = ERR_CAST(nvmem); in nvmem_cell_get_from_lookup()
1330 cell_entry = nvmem_find_cell_entry_by_name(nvmem, in nvmem_cell_get_from_lookup()
1333 __nvmem_device_put(nvmem); in nvmem_cell_get_from_lookup()
1338 __nvmem_device_put(nvmem); in nvmem_cell_get_from_lookup()
1350 nvmem_find_cell_entry_by_node(struct nvmem_device *nvmem, struct device_node *np) in nvmem_find_cell_entry_by_node() argument
1355 list_for_each_entry(iter, &nvmem->cells, node) { in nvmem_find_cell_entry_by_node()
1367 * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
1369 * @np: Device tree node that uses the nvmem cell.
1370 * @id: nvmem cell name from nvmem-cell-names property, or NULL
1372 * nvmem-cell-names property).
1381 struct nvmem_device *nvmem; in of_nvmem_cell_get() local
1391 index = of_property_match_string(np, "nvmem-cell-names", id); in of_nvmem_cell_get()
1393 ret = of_parse_phandle_with_optional_args(np, "nvmem-cells", in of_nvmem_cell_get()
1394 "#nvmem-cell-cells", in of_nvmem_cell_get()
1412 /* nvmem layouts produce cells within the nvmem-layout container */ in of_nvmem_cell_get()
1413 if (of_node_name_eq(nvmem_np, "nvmem-layout")) { in of_nvmem_cell_get()
1421 nvmem = __nvmem_device_get(nvmem_np, device_match_of_node); in of_nvmem_cell_get()
1423 if (IS_ERR(nvmem)) { in of_nvmem_cell_get()
1425 return ERR_CAST(nvmem); in of_nvmem_cell_get()
1428 cell_entry = nvmem_find_cell_entry_by_node(nvmem, cell_np); in of_nvmem_cell_get()
1431 __nvmem_device_put(nvmem); in of_nvmem_cell_get()
1437 __nvmem_device_put(nvmem); in of_nvmem_cell_get()
1445 * nvmem_cell_get() - Get nvmem cell of device form a given cell name
1447 * @dev: Device that requests the nvmem cell.
1448 * @id: nvmem cell name to get (this corresponds with the name from the
1449 * nvmem-cell-names property for DT systems and with the con_id from
1480 * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
1482 * @dev: Device that requests the nvmem cell.
1483 * @id: nvmem cell name id to get.
1520 * devm_nvmem_cell_put() - Release previously allocated nvmem cell
1523 * @dev: Device that requests the nvmem cell.
1524 * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get().
1538 * nvmem_cell_put() - Release previously allocated nvmem cell.
1540 * @cell: Previously allocated nvmem cell by nvmem_cell_get().
1544 struct nvmem_device *nvmem = cell->entry->nvmem; in nvmem_cell_put() local
1550 __nvmem_device_put(nvmem); in nvmem_cell_put()
1587 static int __nvmem_cell_read(struct nvmem_device *nvmem, in __nvmem_cell_read() argument
1593 rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len); in __nvmem_cell_read()
1616 * nvmem_cell_read() - Read a given nvmem cell
1618 * @cell: nvmem cell to be read.
1628 struct nvmem_device *nvmem = entry->nvmem; in nvmem_cell_read() local
1632 if (!nvmem) in nvmem_cell_read()
1639 rc = __nvmem_cell_read(nvmem, cell->entry, buf, len, cell->id, cell->index); in nvmem_cell_read()
1652 struct nvmem_device *nvmem = cell->nvmem; in nvmem_cell_prepare_write_buffer() local
1668 /* setup the first byte with lsb bits from nvmem */ in nvmem_cell_prepare_write_buffer()
1669 rc = nvmem_reg_read(nvmem, cell->offset, &v, 1); in nvmem_cell_prepare_write_buffer()
1687 /* setup the last byte with msb bits from nvmem */ in nvmem_cell_prepare_write_buffer()
1688 rc = nvmem_reg_read(nvmem, in nvmem_cell_prepare_write_buffer()
1704 struct nvmem_device *nvmem = cell->nvmem; in __nvmem_cell_entry_write() local
1707 if (!nvmem || nvmem->read_only || in __nvmem_cell_entry_write()
1727 rc = nvmem_reg_write(nvmem, cell->offset, buf, cell->bytes); in __nvmem_cell_entry_write()
1740 * nvmem_cell_write() - Write to a given nvmem cell
1742 * @cell: nvmem cell to be written.
1744 * @len: length of buffer to be written to nvmem cell.
1786 * @dev: Device that requests the nvmem cell.
1787 * @cell_id: Name of nvmem cell to read.
1801 * @dev: Device that requests the nvmem cell.
1802 * @cell_id: Name of nvmem cell to read.
1816 * @dev: Device that requests the nvmem cell.
1817 * @cell_id: Name of nvmem cell to read.
1831 * @dev: Device that requests the nvmem cell.
1832 * @cell_id: Name of nvmem cell to read.
1879 * @dev: Device that requests the nvmem cell.
1880 * @cell_id: Name of nvmem cell to read.
1910 * @dev: Device that requests the nvmem cell.
1911 * @cell_id: Name of nvmem cell to read.
1939 * nvmem_device_cell_read() - Read a given nvmem device and cell
1941 * @nvmem: nvmem device to read from.
1942 * @info: nvmem cell info to be read.
1948 ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem, in nvmem_device_cell_read() argument
1955 if (!nvmem) in nvmem_device_cell_read()
1958 rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell); in nvmem_device_cell_read()
1962 rc = __nvmem_cell_read(nvmem, &cell, buf, &len, NULL, 0); in nvmem_device_cell_read()
1971 * nvmem_device_cell_write() - Write cell to a given nvmem device
1973 * @nvmem: nvmem device to be written to.
1974 * @info: nvmem cell info to be written.
1979 int nvmem_device_cell_write(struct nvmem_device *nvmem, in nvmem_device_cell_write() argument
1985 if (!nvmem) in nvmem_device_cell_write()
1988 rc = nvmem_cell_info_to_nvmem_cell_entry_nodup(nvmem, info, &cell); in nvmem_device_cell_write()
1997 * nvmem_device_read() - Read from a given nvmem device
1999 * @nvmem: nvmem device to read from.
2000 * @offset: offset in nvmem device.
2007 int nvmem_device_read(struct nvmem_device *nvmem, in nvmem_device_read() argument
2013 if (!nvmem) in nvmem_device_read()
2016 rc = nvmem_reg_read(nvmem, offset, buf, bytes); in nvmem_device_read()
2026 * nvmem_device_write() - Write cell to a given nvmem device
2028 * @nvmem: nvmem device to be written to.
2029 * @offset: offset in nvmem device.
2035 int nvmem_device_write(struct nvmem_device *nvmem, in nvmem_device_write() argument
2041 if (!nvmem) in nvmem_device_write()
2044 rc = nvmem_reg_write(nvmem, offset, buf, bytes); in nvmem_device_write()
2116 * nvmem_dev_name() - Get the name of a given nvmem device.
2118 * @nvmem: nvmem device.
2120 * Return: name of the nvmem device.
2122 const char *nvmem_dev_name(struct nvmem_device *nvmem) in nvmem_dev_name() argument
2124 return dev_name(&nvmem->dev); in nvmem_dev_name()
2129 * nvmem_dev_size() - Get the size of a given nvmem device.
2131 * @nvmem: nvmem device.
2133 * Return: size of the nvmem device.
2135 size_t nvmem_dev_size(struct nvmem_device *nvmem) in nvmem_dev_size() argument
2137 return nvmem->size; in nvmem_dev_size()
2156 MODULE_DESCRIPTION("nvmem Driver Core");