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authorThierry Reding <treding@nvidia.com>2020-04-03 20:44:52 +0300
committerThierry Reding <treding@nvidia.com>2020-04-30 13:38:01 +0300
commit0da0e31600e8a42c6f1dfaa7a06211c8bb243ea7 (patch)
tree5b684291ddb8e32b55c0b358ab9c03b0f7381c95 /drivers/of
parent8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff)
downloadlinux-0da0e31600e8a42c6f1dfaa7a06211c8bb243ea7.tar.xz
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>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_reserved_mem.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 1a84bc0d5fa8..ed2ff6f01d32 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -358,6 +358,25 @@ int of_reserved_mem_device_init_by_idx(struct device *dev,
EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_by_idx);
/**
+ * of_reserved_mem_device_init_by_name() - assign named reserved memory region
+ * to given device
+ * @dev: pointer to the device to configure
+ * @np: pointer to the device node with 'memory-region' property
+ * @name: name of the selected memory region
+ *
+ * Returns: 0 on success or a negative error-code on failure.
+ */
+int of_reserved_mem_device_init_by_name(struct device *dev,
+ struct device_node *np,
+ const char *name)
+{
+ int idx = of_property_match_string(np, "memory-region-names", name);
+
+ return of_reserved_mem_device_init_by_idx(dev, np, idx);
+}
+EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_by_name);
+
+/**
* of_reserved_mem_device_release() - release reserved memory device structures
* @dev: Pointer to the device to deconfigure
*