diff options
| -rw-r--r-- | drivers/nvmem/core.c | 21 | ||||
| -rw-r--r-- | include/linux/nvmem-provider.h | 16 |
2 files changed, 37 insertions, 0 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 27f67dfa649d..d9fd11033c1c 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -28,6 +28,7 @@ struct nvmem_device { size_t size; bool read_only; int flags; + enum nvmem_type type; struct bin_attribute eeprom; struct device *base_dev; struct list_head cells; @@ -83,6 +84,21 @@ static int nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, return -EINVAL; } +static ssize_t type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nvmem_device *nvmem = to_nvmem_device(dev); + + return sprintf(buf, "%s\n", nvmem_type_str[nvmem->type]); +} + +static DEVICE_ATTR_RO(type); + +static struct attribute *nvmem_attrs[] = { + &dev_attr_type.attr, + NULL, +}; + static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t pos, size_t count) @@ -168,6 +184,7 @@ static struct bin_attribute *nvmem_bin_rw_attributes[] = { static const struct attribute_group nvmem_bin_rw_group = { .bin_attrs = nvmem_bin_rw_attributes, + .attrs = nvmem_attrs, }; static const struct attribute_group *nvmem_rw_dev_groups[] = { @@ -191,6 +208,7 @@ static struct bin_attribute *nvmem_bin_ro_attributes[] = { static const struct attribute_group nvmem_bin_ro_group = { .bin_attrs = nvmem_bin_ro_attributes, + .attrs = nvmem_attrs, }; static const struct attribute_group *nvmem_ro_dev_groups[] = { @@ -215,6 +233,7 @@ static struct bin_attribute *nvmem_bin_rw_root_attributes[] = { static const struct attribute_group nvmem_bin_rw_root_group = { .bin_attrs = nvmem_bin_rw_root_attributes, + .attrs = nvmem_attrs, }; static const struct attribute_group *nvmem_rw_root_dev_groups[] = { @@ -238,6 +257,7 @@ static struct bin_attribute *nvmem_bin_ro_root_attributes[] = { static const struct attribute_group nvmem_bin_ro_root_group = { .bin_attrs = nvmem_bin_ro_root_attributes, + .attrs = nvmem_attrs, }; static const struct attribute_group *nvmem_ro_root_dev_groups[] = { @@ -605,6 +625,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) nvmem->dev.bus = &nvmem_bus_type; nvmem->dev.parent = config->dev; nvmem->priv = config->priv; + nvmem->type = config->type; nvmem->reg_read = config->reg_read; nvmem->reg_write = config->reg_write; nvmem->dev.of_node = config->dev->of_node; diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h index 1e3283c2af77..00ff92571683 100644 --- a/include/linux/nvmem-provider.h +++ b/include/linux/nvmem-provider.h @@ -19,6 +19,20 @@ typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset, typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset, void *val, size_t bytes); +enum nvmem_type { + NVMEM_TYPE_UNKNOWN = 0, + NVMEM_TYPE_EEPROM, + NVMEM_TYPE_OTP, + NVMEM_TYPE_BATTERY_BACKED, +}; + +static const char * const nvmem_type_str[] = { + [NVMEM_TYPE_UNKNOWN] = "Unknown", + [NVMEM_TYPE_EEPROM] = "EEPROM", + [NVMEM_TYPE_OTP] = "OTP", + [NVMEM_TYPE_BATTERY_BACKED] = "Battery backed", +}; + /** * struct nvmem_config - NVMEM device configuration * @@ -28,6 +42,7 @@ typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset, * @owner: Pointer to exporter module. Used for refcounting. * @cells: Optional array of pre-defined NVMEM cells. * @ncells: Number of elements in cells. + * @type: Type of the nvmem storage * @read_only: Device is read-only. * @root_only: Device is accessibly to root only. * @reg_read: Callback to read data. @@ -51,6 +66,7 @@ struct nvmem_config { struct module *owner; const struct nvmem_cell_info *cells; int ncells; + enum nvmem_type type; bool read_only; bool root_only; nvmem_reg_read_t reg_read; |