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[V3,1/6] nvmem: core: add nvmem_dev_size() helper

Message ID 20230127125709.32191-1-zajec5@gmail.com
State New
Headers show
Series [V3,1/6] nvmem: core: add nvmem_dev_size() helper | expand

Commit Message

Rafał Miłecki Jan. 27, 2023, 12:57 p.m. UTC 
From: Rafał Miłecki <rafal@milecki.pl>

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>
---
V2: Drop "const" from "const size_t"
---
 drivers/nvmem/core.c           | 13 +++++++++++++
 include/linux/nvmem-consumer.h |  1 +
 2 files changed, 14 insertions(+)
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Patch

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 38a5728bc65c..9e77af0164aa 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -2063,6 +2063,19 @@  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,