of: reserved-memory: Support lookup of regions by name

Add support for looking up memory regions by name. This looks up the
given name in the newly introduced memory-region-names property and
returns the memory region at the corresponding index in the memory-
region(s) property.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index 60f541912ccf..a1b427ac291b 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -33,6 +33,9 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
 
 int of_reserved_mem_device_init_by_idx(struct device *dev,
 				       struct device_node *np, int idx);
+int of_reserved_mem_device_init_by_name(struct device *dev,
+					struct device_node *np,
+					const char *name);
 void of_reserved_mem_device_release(struct device *dev);
 
 void fdt_init_reserved_mem(void);
@@ -45,6 +48,14 @@ static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
 {
 	return -ENOSYS;
 }
+
+static inline int of_reserved_mem_device_init_by_name(struct device *dev,
+						      struct device_node *np,
+						      const char *name)
+{
+	return -ENOSYS;
+}
+
 static inline void of_reserved_mem_device_release(struct device *pdev) { }
 
 static inline void fdt_init_reserved_mem(void) { }