[V2,1/6] nvmem: core: add nvmem_dev_size() helper

Commit Message

Rafał Miłecki Jan. 11, 2023, 7:30 a.m. UTC

From: Rafał Miłecki <[e-mail]>

This is required by layouts that need to read whole NVMEM space. It
applies to NVMEM devices without hardcoded layout (like U-Boot
environment data block).

Signed-off-by: Rafał Miłecki <[e-mail]>
---
V2: Drop "const" from "const size_t"
---
 drivers/nvmem/core.c           | 13 +++++++++++++
 include/linux/nvmem-consumer.h |  1 +
 2 files changed, 14 insertions(+)

Patch

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index d3be50ed2d0b..32f7fb81375a 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -2062,6 +2062,19 @@  void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries)
 }
 EXPORT_SYMBOL_GPL(nvmem_del_cell_lookups);
 
+/**
+ * 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);
+
 /**
  * nvmem_dev_name() - Get the name of a given nvmem device.
  *
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index fa030d93b768..c3005ab6cc4f 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -78,6 +78,7 @@  ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
 int nvmem_device_cell_write(struct nvmem_device *nvmem,
 			    struct nvmem_cell_info *info, void *buf);
 
+size_t nvmem_dev_size(struct nvmem_device *nvmem);
 const char *nvmem_dev_name(struct nvmem_device *nvmem);
 
 void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries,