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author | Rafał Miłecki <rafal@milecki.pl> | 2023-01-06 19:37:37 +0100 |
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committer | Rafał Miłecki <rafal@milecki.pl> | 2023-01-06 22:08:03 +0100 |
commit | 8dfe69cdfc5c943f946faa873ff330b47125011d (patch) | |
tree | a68e869e00bcadec6c32252916e1a0fc5e18c51d /target/linux/generic/backport-5.15/802-v5.16-0002-nvmem-core-add-nvmem-cell-post-processing-callback.patch | |
parent | d3e89e69c52115d1c02f5c16a4aa6b721e003578 (diff) | |
download | upstream-8dfe69cdfc5c943f946faa873ff330b47125011d.tar.gz upstream-8dfe69cdfc5c943f946faa873ff330b47125011d.tar.bz2 upstream-8dfe69cdfc5c943f946faa873ff330b47125011d.zip |
kernel: update nvmem subsystem to the latest upstream
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/generic/backport-5.15/802-v5.16-0002-nvmem-core-add-nvmem-cell-post-processing-callback.patch')
-rw-r--r-- | target/linux/generic/backport-5.15/802-v5.16-0002-nvmem-core-add-nvmem-cell-post-processing-callback.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/802-v5.16-0002-nvmem-core-add-nvmem-cell-post-processing-callback.patch b/target/linux/generic/backport-5.15/802-v5.16-0002-nvmem-core-add-nvmem-cell-post-processing-callback.patch new file mode 100644 index 0000000000..93a540c2b1 --- /dev/null +++ b/target/linux/generic/backport-5.15/802-v5.16-0002-nvmem-core-add-nvmem-cell-post-processing-callback.patch @@ -0,0 +1,82 @@ +From 5008062f1c3f5af3acf86164aa6fcc77b0c7bdce Mon Sep 17 00:00:00 2001 +From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Date: Wed, 13 Oct 2021 14:19:56 +0100 +Subject: [PATCH] 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> +--- + drivers/nvmem/core.c | 9 +++++++++ + include/linux/nvmem-provider.h | 5 +++++ + 2 files changed, 14 insertions(+) + +--- 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; + }; +@@ -798,6 +799,7 @@ struct nvmem_device *nvmem_register(cons + 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 nvme + 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; + +--- a/include/linux/nvmem-provider.h ++++ b/include/linux/nvmem-provider.h +@@ -19,6 +19,9 @@ typedef int (*nvmem_reg_read_t)(void *pr + void *val, size_t bytes); + typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset, + void *val, size_t bytes); ++/* used for vendor specific post processing of cell data */ ++typedef int (*nvmem_cell_post_process_t)(void *priv, const char *id, unsigned int offset, ++ void *buf, size_t bytes); + + enum nvmem_type { + NVMEM_TYPE_UNKNOWN = 0, +@@ -62,6 +65,7 @@ struct nvmem_keepout { + * @no_of_node: Device should not use the parent's of_node even if it's !NULL. + * @reg_read: Callback to read data. + * @reg_write: Callback to write data. ++ * @cell_post_process: Callback for vendor specific post processing of cell data + * @size: Device size. + * @word_size: Minimum read/write access granularity. + * @stride: Minimum read/write access stride. +@@ -94,6 +98,7 @@ struct nvmem_config { + bool no_of_node; + nvmem_reg_read_t reg_read; + nvmem_reg_write_t reg_write; ++ nvmem_cell_post_process_t cell_post_process; + int size; + int word_size; + int stride; |