diff options
| author |   Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2018-09-21 06:40:15 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-28 15:14:54 +0200 |
| commit | b985f4cba6dbb3b60ad119c6f7e5cbad6f0d7e45 (patch) | |
| tree | 6062e9d3fb702b0cbc496f8a8e2003f7696638fd /include/linux/nvmem-provider.h | |
| parent | nvmem: remove the global cell list (diff) | |
| download | wireguard-linux-b985f4cba6dbb3b60ad119c6f7e5cbad6f0d7e45.tar.xz wireguard-linux-b985f4cba6dbb3b60ad119c6f7e5cbad6f0d7e45.zip | |
nvmem: add support for cell info
Add new structs and routines allowing users to define nvmem cells from
machine code. This global list of entries is parsed when a provider
is registered and cells are associated with the relevant nvmem_device
struct.
A possible improvement for the future is to allow users to register
cell tables after the nvmem provider has been registered by updating
the cell list at each call to nvmem_(add|del)_cell_table().
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/nvmem-provider.h')
| -rw-r--r-- | include/linux/nvmem-provider.h | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h index 0f357d0c1e75..5c9f205cac8f 100644 --- a/include/linux/nvmem-provider.h +++ b/include/linux/nvmem-provider.h @@ -67,6 +67,25 @@ struct nvmem_config { struct device *base_dev; }; +/** + * struct nvmem_cell_table - NVMEM cell definitions for given provider + * + * @nvmem_name: Provider name. + * @cells: Array of cell definitions. + * @ncells: Number of cell definitions in the array. + * @node: List node. + * + * This structure together with related helper functions is provided for users + * that don't can't access the nvmem provided structure but wish to register + * cell definitions for it e.g. board files registering an EEPROM device. + */ +struct nvmem_cell_table { + const char *nvmem_name; + const struct nvmem_cell_info *cells; + size_t ncells; + struct list_head node; +}; + #if IS_ENABLED(CONFIG_NVMEM) struct nvmem_device *nvmem_register(const struct nvmem_config *cfg); @@ -77,9 +96,9 @@ struct nvmem_device *devm_nvmem_register(struct device *dev, int devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem); -int nvmem_add_cells(struct nvmem_device *nvmem, - const struct nvmem_cell_info *info, - int ncells); +void nvmem_add_cell_table(struct nvmem_cell_table *table); +void nvmem_del_cell_table(struct nvmem_cell_table *table); + #else static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c) @@ -102,12 +121,8 @@ devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem) } -static inline int nvmem_add_cells(struct nvmem_device *nvmem, - const struct nvmem_cell_info *info, - int ncells) -{ - return -ENOSYS; -} +static inline void nvmem_add_cell_table(struct nvmem_cell_table *table) {} +static inline void nvmem_del_cell_table(struct nvmem_cell_table *table) {} #endif /* CONFIG_NVMEM */ #endif /* ifndef _LINUX_NVMEM_PROVIDER_H */ |