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Code Issues Releases Wiki Activity

nvmem: layouts: refactor .add_cells() callback arguments

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Simply pass whole "struct nvmem_layout" instead of single variables.
There is nothing in "struct nvmem_layout" that we have to hide from
layout drivers. They also access it during .probe() and .remove().

Thanks to this change:

1. API gets more consistent
   All layouts drivers callbacks get the same argument

2. Layouts get correct device
   Before this change NVMEM core code was passing NVMEM device instead
   of layout device. That resulted in:
   * Confusing prints
   * Calling devm_*() helpers on wrong device
   * Helpers like of_device_get_match_data() dereferencing NULLs

3. It gets possible to get match data
   First of all nvmem_layout_get_match_data() requires passing "struct
   nvmem_layout" which .add_cells() callback didn't have before this. It
   doesn't matter much as it's rather useless now anyway (and will be
   dropped).
   What's more important however is that of_device_get_match_data() can
   be used now thanks to owning a proper device pointer.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20231219120104.3422-1-zajec5@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rafał Miłecki 2023-12-19 13:01:03 +01:00 committed by Greg Kroah-Hartman
parent d8407f71eb
commit 401df0d4f4
4 changed files with 8 additions and 4 deletions
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2
drivers/nvmem/core.c
View file

@ -854,7 +854,7 @@ int nvmem_layout_register(struct nvmem_layout *layout)
return -EINVAL;
/* Populate the cells */
ret = layout->add_cells(&layout->nvmem->dev, layout->nvmem);
ret = layout->add_cells(layout);
if (ret)
return ret;

4
drivers/nvmem/layouts/onie-tlv.c
View file

@ -182,8 +182,10 @@ static bool onie_tlv_crc_is_valid(struct device *dev, size_t table_len, u8 *tabl
return true;
}
static int onie_tlv_parse_table(struct device *dev, struct nvmem_device *nvmem)
static int onie_tlv_parse_table(struct nvmem_layout *layout)
{
struct nvmem_device *nvmem = layout->nvmem;
struct device *dev = &layout->dev;
struct onie_tlv_hdr hdr;
size_t table_len, data_len, hdr_len;
u8 *table, *data;

4
drivers/nvmem/layouts/sl28vpd.c
View file

@ -80,8 +80,10 @@ static int sl28vpd_v1_check_crc(struct device *dev, struct nvmem_device *nvmem)
return 0;
}
static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem)
static int sl28vpd_add_cells(struct nvmem_layout *layout)
{
struct nvmem_device *nvmem = layout->nvmem;
struct device *dev = &layout->dev;
const struct nvmem_cell_info *pinfo;
struct nvmem_cell_info info = {0};
struct device_node *layout_np;

2
include/linux/nvmem-provider.h
View file

@ -173,7 +173,7 @@ struct nvmem_cell_table {
struct nvmem_layout {
struct device dev;
struct nvmem_device *nvmem;
int (*add_cells)(struct device *dev, struct nvmem_device *nvmem);
int (*add_cells)(struct nvmem_layout *layout);
};
struct nvmem_layout_driver {