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nvmem: core: add nvmem_add_one_cell()

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Add a new function to add exactly one cell. This will be used by the
nvmem layout drivers to add custom cells. In contrast to the
nvmem_add_cells(), this has the advantage that we don't have to assemble
a list of cells on runtime.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230206134356.839737-16-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Walle 2023-02-06 13:43:49 +00:00 committed by Greg Kroah-Hartman
parent cc5bdd323d
commit 2ded6830d3
2 changed files with 43 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
drivers/nvmem/core.c
View File

@ -501,6 +501,36 @@ static int nvmem_cell_info_to_nvmem_cell_entry(struct nvmem_device *nvmem,
return 0;
}
/**
* nvmem_add_one_cell() - Add one cell information to an nvmem device
*
* @nvmem: nvmem device to add cells to.
* @info: nvmem cell info to add to the device
*
* Return: 0 or negative error code on failure.
*/
int nvmem_add_one_cell(struct nvmem_device *nvmem,
const struct nvmem_cell_info *info)
{
struct nvmem_cell_entry *cell;
int rval;
cell = kzalloc(sizeof(*cell), GFP_KERNEL);
if (!cell)
return -ENOMEM;
rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, info, cell);
if (rval) {
kfree(cell);
return rval;
}
nvmem_cell_entry_add(cell);
return 0;
}
EXPORT_SYMBOL_GPL(nvmem_add_one_cell);
/**
* nvmem_add_cells() - Add cell information to an nvmem device
*
@ -514,34 +544,15 @@ static int nvmem_add_cells(struct nvmem_device *nvmem,
const struct nvmem_cell_info *info,
int ncells)
{
struct nvmem_cell_entry **cells;
int i, rval = 0;
cells = kcalloc(ncells, sizeof(*cells), GFP_KERNEL);
if (!cells)
return -ENOMEM;
int i, rval;
for (i = 0; i < ncells; i++) {
cells[i] = kzalloc(sizeof(**cells), GFP_KERNEL);
if (!cells[i]) {
rval = -ENOMEM;
goto out;
}
rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, &info[i], cells[i]);
if (rval) {
kfree(cells[i]);
goto out;
}
nvmem_cell_entry_add(cells[i]);
rval = nvmem_add_one_cell(nvmem, &info[i]);
if (rval)
return rval;
}
out:
/* remove tmp array */
kfree(cells);
return rval;
return 0;
}
/**

8
include/linux/nvmem-provider.h
View File

@ -153,6 +153,9 @@ struct nvmem_device *devm_nvmem_register(struct device *dev,
void nvmem_add_cell_table(struct nvmem_cell_table *table);
void nvmem_del_cell_table(struct nvmem_cell_table *table);
int nvmem_add_one_cell(struct nvmem_device *nvmem,
const struct nvmem_cell_info *info);
#else
static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
@ -170,6 +173,11 @@ devm_nvmem_register(struct device *dev, const struct nvmem_config *c)
static inline void nvmem_add_cell_table(struct nvmem_cell_table *table) {}
static inline void nvmem_del_cell_table(struct nvmem_cell_table *table) {}
static inline int nvmem_add_one_cell(struct nvmem_device *nvmem,
const struct nvmem_cell_info *info)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_NVMEM */
#endif /* ifndef _LINUX_NVMEM_PROVIDER_H */