[PATCH 2/4] nvmem: core: add nvmem_dev_size() helper

Rafał Miłecki
2023-12-18T13:37:44Z

From: Rafał Miłecki <rafal@milecki.pl>

This is required by layouts that need to read whole NVMEM content. It's
especially useful for NVMEM devices without hardcoded layout (like
U-Boot environment data block).

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
drivers/nvmem/core.c | 13 +++++++++++++
include/linux/nvmem-consumer.h | 1 +
2 files changed, 14 insertions(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index ba559e81f77f..1b08bb072f86 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -2176,6 +2176,19 @@ const char *nvmem_dev_name(struct nvmem_device *nvmem)
}
EXPORT_SYMBOL_GPL(nvmem_dev_name);

+/**
+ * nvmem_dev_size() - Get the size of a given nvmem device.
+ *
+ * @nvmem: nvmem device.
+ *
+ * Return: size of the nvmem device.
+ */
+size_t nvmem_dev_size(struct nvmem_device *nvmem)
+{
+ return nvmem->size;
+}
+EXPORT_SYMBOL_GPL(nvmem_dev_size);
+
static int __init nvmem_init(void)
{
int ret;
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 2d306fa13b1a..34c0e58dfa26 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -81,6 +81,7 @@ int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);

const char *nvmem_dev_name(struct nvmem_device *nvmem);
+size_t nvmem_dev_size(struct nvmem_device *nvmem);

void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries,
size_t nentries);
--
2.35.3