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nvmem: core: add nvmem_cell_read_u16

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Add nvmem_cell_read_u16() helper to ease read of an u16 value on consumer
side. This is inspired by nvmem_cell_read_u32() function.
This helper is useful on stm32 that has 16 bits data cells stored in non
volatile memory.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fabrice Gasnier
2019-04-13 11:32:57 +01:00
committed by Greg Kroah-Hartman
parent 7c1cd8fda8
commit 0a9b2d1ce4
2 changed files with 44 additions and 0 deletions
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7
include/linux/nvmem-consumer.h
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@@ -61,6 +61,7 @@ void nvmem_cell_put(struct nvmem_cell *cell);
void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val);
int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val);
/* direct nvmem device read/write interface */
@@ -122,6 +123,12 @@ static inline int nvmem_cell_write(struct nvmem_cell *cell,
return -EOPNOTSUPP;
}
static inline int nvmem_cell_read_u16(struct device *dev,
const char *cell_id, u16 *val)
{
return -EOPNOTSUPP;
}
static inline int nvmem_cell_read_u32(struct device *dev,
const char *cell_id, u32 *val)
{