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| author | Lucas Stach <l.stach@pengutronix.de> | 2023-02-02 18:33:08 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2023-02-06 08:42:57 +0100 |
| commit | 68c9f07905c52ef36d9a73a3c9ad0186ced68d06 (patch) | |
| tree | 0aba7c9c2ec02cb932e1a03bee86060297087bfc /drivers/nvmem | |
| parent | 0275cbae004d3f8510589d486645cd5d205cc525 (diff) | |
| download | barebox-68c9f07905c52ef36d9a73a3c9ad0186ced68d06.tar.gz barebox-68c9f07905c52ef36d9a73a3c9ad0186ced68d06.tar.xz | |
nvmem: add support for post processing
This is a port of the Linux commit 5008062f1c3f ("nvmem: core: add nvmem
cell post processing callback"). It looks a little different, as Linux
switched to create nvmem cells at registration time, effectively
deduplicating the cells, but then needed to introduce nvmem_cells_entry
to be able to store the lookup name, which is used by the post-processing.
As Barebox simply created a nvmem cell per lookup, as Linux did before
e888d445ac33 ("nvmem: resolve cells from DT at registration time"), we
can simply store the lookup name in the cell.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.barebox.org/20230202173312.504493-1-l.stach@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index cd3328a650..e0110296f8 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -26,10 +26,12 @@ struct nvmem_device { bool read_only; struct cdev cdev; void *priv; + nvmem_cell_post_process_t cell_post_process; }; struct nvmem_cell { const char *name; + const char *id; int offset; int bytes; int bit_offset; @@ -145,6 +147,7 @@ static struct nvmem_cell *nvmem_find_cell(const char *cell_id) static void nvmem_cell_drop(struct nvmem_cell *cell) { list_del(&cell->node); + kfree(cell->id); kfree(cell); } @@ -209,6 +212,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) np = config->cdev ? config->cdev->device_node : config->dev->of_node; nvmem->dev.of_node = np; nvmem->priv = config->priv; + nvmem->cell_post_process = config->cell_post_process; if (config->read_only || !config->bus->write || of_property_read_bool(np, "read-only")) nvmem->read_only = true; @@ -417,6 +421,7 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, cell->offset = be32_to_cpup(addr++); cell->bytes = be32_to_cpup(addr); cell->name = cell_np->name; + cell->id = kstrdup_const(name, GFP_KERNEL); addr = of_get_property(cell_np, "bits", &len); if (addr && len == (2 * sizeof(u32))) { @@ -534,6 +539,13 @@ static int __nvmem_cell_read(struct nvmem_device *nvmem, if (cell->bit_offset || cell->nbits) nvmem_shift_read_buffer_in_place(cell, buf); + if (nvmem->cell_post_process) { + rc = nvmem->cell_post_process(nvmem->priv, cell->id, + cell->offset, buf, cell->bytes); + if (rc) + return rc; + } + *len = cell->bytes; return 0; |