diff options
| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2021-10-13 16:19:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-13 16:33:17 +0300 |
| commit | 5008062f1c3f5af3acf86164aa6fcc77b0c7bdce (patch) | |
| tree | 01ab77834192637f5b5dbf29a63dd5602858ed7f /drivers/nvmem | |
| parent | 7ae6478b304bc004c3139b422665b0e23b57f05c (diff) | |
| download | linux-5008062f1c3f5af3acf86164aa6fcc77b0c7bdce.tar.xz | |
nvmem: core: add nvmem cell post processing callback
Some NVMEM providers have certain nvmem cells encoded, which requires
post processing before actually using it.
For example mac-address is stored in either in ascii or delimited or reverse-order.
Having a post-process callback hook to provider drivers would enable them to
do this vendor specific post processing before nvmem consumers see it.
Tested-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20211013131957.30271-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/core.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index f37d7838d2e3..d7013c9b0fae 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -38,6 +38,7 @@ struct nvmem_device { unsigned int nkeepout; nvmem_reg_read_t reg_read; nvmem_reg_write_t reg_write; + nvmem_cell_post_process_t cell_post_process; struct gpio_desc *wp_gpio; void *priv; }; @@ -796,6 +797,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) nvmem->type = config->type; nvmem->reg_read = config->reg_read; nvmem->reg_write = config->reg_write; + nvmem->cell_post_process = config->cell_post_process; nvmem->keepout = config->keepout; nvmem->nkeepout = config->nkeepout; if (config->of_node) @@ -1440,6 +1442,13 @@ 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, id, + cell->offset, buf, cell->bytes); + if (rc) + return rc; + } + if (len) *len = cell->bytes; |