[PATCH v2 10/20] nvmem: core: allow to modify a cell before adding it

Michael Walle
2022-09-01T22:22:29Z

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>
---
changes since v1:
- new patch

drivers/nvmem/core.c | 4 ++++
include/linux/nvmem-provider.h | 5 +++++
2 files changed, 9 insertions(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 02d0a7099d9a..3b65512762b9 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -693,6 +693,7 @@ 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 nvmem_cell_entry *cell;
struct device_node *child;
@@ -729,6 +730,9 @@ 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) {
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index cb488b338d6f..9cb340764b89 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -157,6 +157,8 @@ 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.
*
@@ -170,6 +172,9 @@ 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;
--
2.30.2