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| author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2018-09-21 06:40:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-28 15:14:54 +0200 |
| commit | 506157be06ba28137b18b7419a4dccfa244f4983 (patch) | |
| tree | 0b0d4d61338277a5d4baa7e941cbcdd6b60e038c /include | |
| parent | e888d445ac33a5b0288d670ecd970908b13f07cd (diff) | |
| download | linux-stable-506157be06ba28137b18b7419a4dccfa244f4983.tar.gz linux-stable-506157be06ba28137b18b7419a4dccfa244f4983.tar.bz2 linux-stable-506157be06ba28137b18b7419a4dccfa244f4983.zip | |
nvmem: add support for cell lookups from machine code
Add a way for machine code users to associate devices with nvmem cells.
This restores the support for non-DT systems but following a different
approach. Cells must now be associated with devices using provided
routines and data structures before they can be retrieved using
nvmem_cell_get().
It's still possible to define cells statically in nvmem_config but
cells created this way still need to be associated with consumers using
lookup entries.
Note that nvmem_find() must be moved higher in the source file as we
want to call it from __nvmem_device_get() for devices that don't have
a device node.
The signature of __nvmem_device_get() is also changed as it's no longer
used to retrieve cells.
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')
| -rw-r--r-- | include/linux/nvmem-consumer.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h index 0389fe00b177..27eee3945405 100644 --- a/include/linux/nvmem-consumer.h +++ b/include/linux/nvmem-consumer.h @@ -29,6 +29,24 @@ struct nvmem_cell_info { unsigned int nbits; }; +/** + * struct nvmem_cell_lookup - cell lookup entry + * + * @nvmem_name: Name of the provider. + * @cell_name: Name of the nvmem cell as defined in the name field of + * struct nvmem_cell_info. + * @dev_id: Name of the consumer device that will be associated with + * this cell. + * @con_id: Connector id for this cell lookup. + */ +struct nvmem_cell_lookup { + const char *nvmem_name; + const char *cell_name; + const char *dev_id; + const char *con_id; + struct list_head node; +}; + #if IS_ENABLED(CONFIG_NVMEM) /* Cell based interface */ @@ -57,6 +75,11 @@ int nvmem_device_cell_write(struct nvmem_device *nvmem, const char *nvmem_dev_name(struct nvmem_device *nvmem); +void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, + size_t nentries); +void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, + size_t nentries); + #else static inline struct nvmem_cell *nvmem_cell_get(struct device *dev, @@ -151,6 +174,11 @@ static inline const char *nvmem_dev_name(struct nvmem_device *nvmem) return NULL; } +static inline void +nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {} +static inline void +nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {} + #endif /* CONFIG_NVMEM */ #if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF) |