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author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2018-09-21 16:40:18 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-28 16:14:54 +0300 |
commit | 4903d19c209529bd2e127d483dc93b472980f33e (patch) | |
tree | 4667595d94984f10b48fffc2524cbe3edac87d36 /Documentation/nvmem | |
parent | 506157be06ba28137b18b7419a4dccfa244f4983 (diff) | |
download | linux-4903d19c209529bd2e127d483dc93b472980f33e.tar.xz |
Documentation: nvmem: document cell tables and lookup entries
Document the new nvmem kernel APIs.
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 'Documentation/nvmem')
-rw-r--r-- | Documentation/nvmem/nvmem.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/nvmem/nvmem.txt b/Documentation/nvmem/nvmem.txt index 8d8d8f58f96f..fc2fe4b18655 100644 --- a/Documentation/nvmem/nvmem.txt +++ b/Documentation/nvmem/nvmem.txt @@ -58,6 +58,37 @@ static int qfprom_probe(struct platform_device *pdev) It is mandatory that the NVMEM provider has a regmap associated with its struct device. Failure to do would return error code from nvmem_register(). +Users of board files can define and register nvmem cells using the +nvmem_cell_table struct: + +static struct nvmem_cell_info foo_nvmem_cells[] = { + { + .name = "macaddr", + .offset = 0x7f00, + .bytes = ETH_ALEN, + } +}; + +static struct nvmem_cell_table foo_nvmem_cell_table = { + .nvmem_name = "i2c-eeprom", + .cells = foo_nvmem_cells, + .ncells = ARRAY_SIZE(foo_nvmem_cells), +}; + +nvmem_add_cell_table(&foo_nvmem_cell_table); + +Additionally it is possible to create nvmem cell lookup entries and register +them with the nvmem framework from machine code as shown in the example below: + +static struct nvmem_cell_lookup foo_nvmem_lookup = { + .nvmem_name = "i2c-eeprom", + .cell_name = "macaddr", + .dev_id = "foo_mac.0", + .con_id = "mac-address", +}; + +nvmem_add_cell_lookups(&foo_nvmem_lookup, 1); + NVMEM Consumers +++++++++++++++ |