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nvmem: core: allow to modify a cell before adding it

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Provide a way to modify a cell before it will get added. This is useful
to attach a custom post processing hook via a layout.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230404172148.82422-18-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Walle 2023-04-04 18:21:25 +01:00 committed by Greg Kroah-Hartman
parent 345ec382cd
commit de12c96915
2 changed files with 9 additions and 0 deletions
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4
drivers/nvmem/core.c
View File

@ -695,6 +695,7 @@ static int nvmem_validate_keepouts(struct nvmem_device *nvmem)
static int nvmem_add_cells_from_of(struct nvmem_device *nvmem)
{
struct nvmem_layout *layout = nvmem->layout;
struct device *dev = &nvmem->dev;
struct device_node *child;
const __be32 *addr;
@ -724,6 +725,9 @@ static int nvmem_add_cells_from_of(struct nvmem_device *nvmem)
info.np = of_node_get(child);
if (layout && layout->fixup_cell_info)
layout->fixup_cell_info(nvmem, layout, &info);
ret = nvmem_add_one_cell(nvmem, &info);
kfree(info.name);
if (ret) {

5
include/linux/nvmem-provider.h
View File

@ -155,6 +155,8 @@ struct nvmem_cell_table {
* @add_cells: Will be called if a nvmem device is found which
* has this layout. The function will add layout
* specific cells with nvmem_add_one_cell().
* @fixup_cell_info: Will be called before a cell is added. Can be
* used to modify the nvmem_cell_info.
* @owner: Pointer to struct module.
* @node: List node.
*
@ -168,6 +170,9 @@ struct nvmem_layout {
const struct of_device_id *of_match_table;
int (*add_cells)(struct device *dev, struct nvmem_device *nvmem,
struct nvmem_layout *layout);
void (*fixup_cell_info)(struct nvmem_device *nvmem,
struct nvmem_layout *layout,
struct nvmem_cell_info *cell);
/* private */
struct module *owner;