[PATCH 04/28] nvmem: provide nvmem_device_name()

Bartosz Golaszewski
2018-08-08T15:37:34Z

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..b040370292a7 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_device_name(struct nvmem_device *nvmem)
+{
+ return dev_name(&nvmem->dev);
+}
+EXPORT_SYMBOL_GPL(nvmem_device_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..c4000a218f67 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_device_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_device_name(struct nvmem_device *nvmem)
+{
+ return ERR_PTR(-ENOSYS);
+}
#endif /* CONFIG_NVMEM */

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