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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2018-09-21 16:40:15 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-28 16:14:54 +0300
commitb985f4cba6dbb3b60ad119c6f7e5cbad6f0d7e45 (patch)
tree6062e9d3fb702b0cbc496f8a8e2003f7696638fd /include/linux/nvmem-provider.h
parentc7235ee3f4b86a01507a12e96a4875ba9b4be842 (diff)
downloadlinux-b985f4cba6dbb3b60ad119c6f7e5cbad6f0d7e45.tar.xz
nvmem: add support for cell info
Add new structs and routines allowing users to define nvmem cells from machine code. This global list of entries is parsed when a provider is registered and cells are associated with the relevant nvmem_device struct. A possible improvement for the future is to allow users to register cell tables after the nvmem provider has been registered by updating the cell list at each call to nvmem_(add|del)_cell_table(). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/nvmem-provider.h')
-rw-r--r--include/linux/nvmem-provider.h33
1 files changed, 24 insertions, 9 deletions
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index 0f357d0c1e75..5c9f205cac8f 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -67,6 +67,25 @@ struct nvmem_config {
struct device *base_dev;
};
+/**
+ * struct nvmem_cell_table - NVMEM cell definitions for given provider
+ *
+ * @nvmem_name: Provider name.
+ * @cells: Array of cell definitions.
+ * @ncells: Number of cell definitions in the array.
+ * @node: List node.
+ *
+ * This structure together with related helper functions is provided for users
+ * that don't can't access the nvmem provided structure but wish to register
+ * cell definitions for it e.g. board files registering an EEPROM device.
+ */
+struct nvmem_cell_table {
+ const char *nvmem_name;
+ const struct nvmem_cell_info *cells;
+ size_t ncells;
+ struct list_head node;
+};
+
#if IS_ENABLED(CONFIG_NVMEM)
struct nvmem_device *nvmem_register(const struct nvmem_config *cfg);
@@ -77,9 +96,9 @@ struct nvmem_device *devm_nvmem_register(struct device *dev,
int devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem);
-int nvmem_add_cells(struct nvmem_device *nvmem,
- const struct nvmem_cell_info *info,
- int ncells);
+void nvmem_add_cell_table(struct nvmem_cell_table *table);
+void nvmem_del_cell_table(struct nvmem_cell_table *table);
+
#else
static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
@@ -102,12 +121,8 @@ devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem)
}
-static inline int nvmem_add_cells(struct nvmem_device *nvmem,
- const struct nvmem_cell_info *info,
- int ncells)
-{
- return -ENOSYS;
-}
+static inline void nvmem_add_cell_table(struct nvmem_cell_table *table) {}
+static inline void nvmem_del_cell_table(struct nvmem_cell_table *table) {}
#endif /* CONFIG_NVMEM */
#endif /* ifndef _LINUX_NVMEM_PROVIDER_H */