Srinivas Kandagatla [off-list ref] hat am 23. Juni 2015 um
01:08 geschrieben:


This patch adds read/write apis which are based on nvmem_device. It is
common that the drivers like omap cape manager or qcom cpr driver to
access bytes directly at particular offset in the eeprom and not from
nvmem cell info in DT. These driver would need to get access to the nvmem
directly, which is what these new APIS provide.

[...]

diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 123af62..f9acc43 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h

@@ -15,6 +15,15 @@

struct device;
/* consumer cookie */
struct nvmem_cell;
+struct nvmem_device;
+
+struct nvmem_cell_info {
+ const char *name;
+ int offset;
+ int bytes;
+ int bit_offset;
+ int nbits;
+};

#if IS_ENABLED(CONFIG_NVMEM)

@@ -26,6 +35,21 @@ void devm_nvmem_cell_put(struct device *dev, struct

nvmem_cell *cell);
void *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len);
int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len);

+/* direct nvmem device read/write interface */
+struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
+struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+ const char *name);
+void nvmem_device_put(struct nvmem_device *nvmem);
+void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
+int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
+ size_t bytes, void *buf);
+int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
+ size_t bytes, void *buf);