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    Subject[PATCH v2 04/29] nvmem: provide nvmem_dev_name()
    Date
    From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

    Kernel users don't have any means of checking the names of nvmem
    devices. Add a routine that returns the name of the nvmem provider.

    This will be useful for nvmem notifier subscribers - otherwise they
    can't check what device is being added/removed.

    Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
    ---
    drivers/nvmem/core.c | 6 ++++++
    include/linux/nvmem-consumer.h | 7 +++++++
    2 files changed, 13 insertions(+)

    diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
    index 128c8e51bff2..31df2e6d6f72 100644
    --- a/drivers/nvmem/core.c
    +++ b/drivers/nvmem/core.c
    @@ -1440,6 +1440,12 @@ int nvmem_device_write(struct nvmem_device *nvmem,
    }
    EXPORT_SYMBOL_GPL(nvmem_device_write);

    +const char *nvmem_dev_name(struct nvmem_device *nvmem)
    +{
    + return dev_name(&nvmem->dev);
    +}
    +EXPORT_SYMBOL_GPL(nvmem_dev_name);
    +
    static int __init nvmem_init(void)
    {
    return bus_register(&nvmem_bus_type);
    diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
    index ae4d30347602..14bb86a7a78d 100644
    --- a/include/linux/nvmem-consumer.h
    +++ b/include/linux/nvmem-consumer.h
    @@ -69,6 +69,8 @@ int nvmem_device_cell_write(struct nvmem_device *nvmem,

    int nvmem_register_notifier(struct notifier_block *nb);
    int nvmem_unregister_notifier(struct notifier_block *nb);
    +
    +const char *nvmem_dev_name(struct nvmem_device *nvmem);
    #else

    static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
    @@ -167,6 +169,11 @@ static inline int int nvmem_unregister_notifier(struct notifier_block *nb)
    {
    return -ENOSYS;
    }
    +
    +static inline const char *nvmem_dev_name(struct nvmem_device *nvmem)
    +{
    + return NULL;
    +}
    #endif /* CONFIG_NVMEM */

    #if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
    --
    2.18.0
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