[PATCH v2 17/20] nvmem: core: export nvmem device size

Michael Walle
2022-09-01T22:23:16Z

Export the size of the nvmem device. NVMEM layout drivers might need it
and might not have access to the device which is registering the NVMEM
device.

Signed-off-by: Michael Walle <michael@walle.cc>
---
changes since v1:
- none

drivers/nvmem/core.c | 13 +++++++++++++
include/linux/nvmem-consumer.h | 6 ++++++
2 files changed, 19 insertions(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 6910796937f9..81fca32a7418 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -2045,6 +2045,19 @@ const char *nvmem_dev_name(struct nvmem_device *nvmem)
}
EXPORT_SYMBOL_GPL(nvmem_dev_name);

+/**
+ * nvmem_device_size() - Get the size of a given nvmem device.
+ *
+ * @nvmem: nvmem device.
+ *
+ * Return: size of the nvmem device.
+ */
+size_t nvmem_device_size(struct nvmem_device *nvmem)
+{
+ return nvmem->size;
+}
+EXPORT_SYMBOL_GPL(nvmem_device_size);
+
static int __init nvmem_init(void)
{
return bus_register(&nvmem_bus_type);
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 1f62f7ba71ca..6607f9a1d6dc 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -77,6 +77,7 @@ ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
+size_t nvmem_device_size(struct nvmem_device *nvmem);

const char *nvmem_dev_name(struct nvmem_device *nvmem);

@@ -206,6 +207,11 @@ static inline int nvmem_device_write(struct nvmem_device *nvmem,
return -EOPNOTSUPP;
}

+static inline size_t nvmem_device_size(struct nvmem_device *nvmem)
+{
+ return 0;
+}
+
static inline const char *nvmem_dev_name(struct nvmem_device *nvmem)
{
return NULL;
--
2.30.2