nvmem: core: add nvmem_dev_size() helper

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 <rafal@milecki.pl>
intel-lab-lkp · Jan 10, 2023 · 4d5cc61 · 4d5cc61
1 parent 435bf71
commit 4d5cc61
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diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
@@ -2060,6 +2060,19 @@ 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.
+ */
+const 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
@@ -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);
 
+const 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,