diff options
| -rw-r--r-- | drivers/nvmem/core.c | 23 | ||||
| -rw-r--r-- | include/linux/nvmem-consumer.h | 10 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 53b934bb33..c0f61f453a 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -750,3 +750,26 @@ int nvmem_device_write(struct nvmem_device *nvmem, return bytes; } EXPORT_SYMBOL_GPL(nvmem_device_write); + +void *nvmem_cell_get_and_read(struct device_node *np, const char *cell_name, + size_t bytes) +{ + struct nvmem_cell *cell; + void *value; + size_t len; + + cell = of_nvmem_cell_get(np, cell_name); + if (IS_ERR(cell)) + return cell; + + value = nvmem_cell_read(cell, &len); + if (!IS_ERR(value) && len != bytes) { + kfree(value); + value = ERR_PTR(-EINVAL); + } + + nvmem_cell_put(cell); + + return value; +} +EXPORT_SYMBOL_GPL(nvmem_cell_get_and_read); diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h index 606cadb498..0ec2f05b97 100644 --- a/include/linux/nvmem-consumer.h +++ b/include/linux/nvmem-consumer.h @@ -32,6 +32,9 @@ struct nvmem_cell_info { struct nvmem_cell *nvmem_cell_get(struct device_d *dev, const char *name); void nvmem_cell_put(struct nvmem_cell *cell); void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len); +void *nvmem_cell_get_and_read(struct device_node *np, const char *cell_name, + size_t bytes); + int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len); /* direct nvmem device read/write interface */ @@ -55,6 +58,13 @@ static inline char *nvmem_cell_read(struct nvmem_cell *cell, size_t *len) return ERR_PTR(-ENOSYS); } +static inline void *nvmem_cell_get_and_read(struct device_node *np, + const char *cell_name, + size_t bytes) +{ + return ERR_PTR(-ENOSYS); +} + static inline int nvmem_cell_write(struct nvmem_cell *cell, const char *buf, size_t len) { |