[PATCH 2/5] device property: Add fwnode_get_name() operation

[Jacopo Mondi <jacopo+renesas@jmondi.org>]

Add operation to retrieve the device name from a fwnode handle.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
 drivers/acpi/property.c  |  6 ++++++
 drivers/base/property.c  | 12 ++++++++++++
 drivers/of/property.c    |  6 ++++++
 include/linux/fwnode.h   |  2 ++
 include/linux/property.h |  1 +
 5 files changed, 27 insertions(+)

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index e26ea20..1e3971c 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1186,6 +1186,11 @@ acpi_fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
 				   val, nval);
 }
 
+static const char *acpi_fwnode_get_name(const struct fwnode_handle *fwnode)
+{
+	return acpi_dev_name(to_acpi_device_node(fwnode));
+}
+
 static struct fwnode_handle *
 acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
 				 const char *childname)
@@ -1281,6 +1286,7 @@ static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 			acpi_fwnode_property_read_string_array,		\
 		.get_parent = acpi_node_get_parent,			\
 		.get_next_child_node = acpi_get_next_subnode,		\
+		.get_name = acpi_fwnode_get_name,			\
 		.get_named_child_node = acpi_fwnode_get_named_child_node, \
 		.get_reference_args = acpi_fwnode_get_reference_args,	\
 		.graph_get_next_endpoint =				\
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 851b1b6..a87b4a9 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -950,6 +950,18 @@ int device_add_properties(struct device *dev,
 EXPORT_SYMBOL_GPL(device_add_properties);
 
 /**
+ * fwnode_get_name - Return the fwnode_handle name
+ * @fwnode: Firmware node to get name from
+ *
+ * Returns a pointer to the firmware node name
+ */
+const char *fwnode_get_name(const struct fwnode_handle *fwnode)
+{
+	return fwnode_call_ptr_op(fwnode, get_name);
+}
+EXPORT_SYMBOL(fwnode_get_name);
+
+/**
  * fwnode_get_next_parent - Iterate to the node's parent
  * @fwnode: Firmware whose parent is retrieved
  *
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 8ad33a4..6c195a8 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -875,6 +875,11 @@ of_fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
 		of_property_count_strings(node, propname);
 }
 
+static const char *of_fwnode_get_name(const struct fwnode_handle *fwnode)
+{
+	return of_node_full_name(to_of_node(fwnode));
+}
+
 static struct fwnode_handle *
 of_fwnode_get_parent(const struct fwnode_handle *fwnode)
 {
@@ -988,6 +993,7 @@ const struct fwnode_operations of_fwnode_ops = {
 	.property_present = of_fwnode_property_present,
 	.property_read_int_array = of_fwnode_property_read_int_array,
 	.property_read_string_array = of_fwnode_property_read_string_array,
+	.get_name = of_fwnode_get_name,
 	.get_parent = of_fwnode_get_parent,
 	.get_next_child_node = of_fwnode_get_next_child_node,
 	.get_named_child_node = of_fwnode_get_named_child_node,
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 411a84c..5d3a8c6 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -57,6 +57,7 @@ struct fwnode_reference_args {
  *				 otherwise.
  * @property_read_string_array: Read an array of string properties. Return zero
  *				on success, a negative error code otherwise.
+ * @get_name: Return the fwnode name.
  * @get_parent: Return the parent of an fwnode.
  * @get_next_child_node: Return the next child node in an iteration.
  * @get_named_child_node: Return a child node with a given name.
@@ -81,6 +82,7 @@ struct fwnode_operations {
 	(*property_read_string_array)(const struct fwnode_handle *fwnode_handle,
 				      const char *propname, const char **val,
 				      size_t nval);
+	const char *(*get_name)(const struct fwnode_handle *fwnode);
 	struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode);
 	struct fwnode_handle *
 	(*get_next_child_node)(const struct fwnode_handle *fwnode,
diff --git a/include/linux/property.h b/include/linux/property.h
index f6189a3..0fc464f 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -78,6 +78,7 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
 				       unsigned int nargs, unsigned int index,
 				       struct fwnode_reference_args *args);
 
+const char *fwnode_get_name(const struct fwnode_handle *fwnode);
 struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
 struct fwnode_handle *fwnode_get_next_parent(
 	struct fwnode_handle *fwnode);
-- 
2.7.4