This patch adds perm variable to nvmem_config structure which will allow
providers to specify the permissions required for the sysfs binary file.
This permission is applied on top of root-only access permissions set by
the core.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/nvmem/core.c | 1 +
include/linux/nvmem-provider.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 414ed23..7481387 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -312,6 +312,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
config->read_only;
nvmem->bin = bin_attr_template;
nvmem->bin.attr.mode = nvmem->read_only ? : (S_IRUSR | S_IWUSR);
+ nvmem->bin.attr.mode |= config->perm;
nvmem->bin.size = nvmem->size;
device_initialize(&nvmem->dev);
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index 0b68caf..de9a61f 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -23,6 +23,7 @@ struct nvmem_config {
const struct nvmem_cell_info *cells;
int ncells;
bool read_only;
+ u16 perm; /* visibility in sysfs */
};
#if IS_ENABLED(CONFIG_NVMEM)
--
1.9.1
--
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