@@ -1156,6 +1156,32 @@ void fwnode_handle_put(struct fwnode_handle *fwnode)
}
EXPORT_SYMBOL_GPL(fwnode_handle_put);
+/**
+ * fwnode_get_name - Read the name of a node
+ * @fwnode: Pointer to the node.
+ * @buf: Buffer where the name is copied to
+ * @len: Size of the buffer
+ *
+ * Reads the node name of @fwnode with get_name fwnode op. If get_name op fails,
+ * the routine attempts to also read a property "name".
+ */
+int fwnode_get_name(const struct fwnode_handle *fwnode, char *buf, size_t len)
+{
+ const char *name;
+ int ret;
+
+ if (!fwnode_call_int_op(fwnode, get_name, buf, len))
+ return 0;
+
+ ret = fwnode_call_int_op(fwnode, property_read_string_array,
+ "name", &name, 1);
+ if (!ret)
+ snprintf(buf, len, "%s", name);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(fwnode_get_name);
+
/**
* fwnode_device_is_available - check if a device is available for use
* @fwnode: Pointer to the fwnode of the device.
@@ -52,6 +52,7 @@ struct fwnode_reference_args {
* struct fwnode_operations - Operations for fwnode interface
* @get: Get a reference to an fwnode.
* @put: Put a reference to an fwnode.
+ * @get_name: Get the name of an fwnode
* @device_get_match_data: Return the device driver match data.
* @property_present: Return true if a property is present.
* @property_read_integer_array: Read an array of integer properties. Return
@@ -72,6 +73,8 @@ struct fwnode_reference_args {
struct fwnode_operations {
struct fwnode_handle *(*get)(struct fwnode_handle *fwnode);
void (*put)(struct fwnode_handle *fwnode);
+ int (*get_name)(const struct fwnode_handle *fwnode, char *buf,
+ size_t len);
bool (*device_is_available)(const struct fwnode_handle *fwnode);
const void *(*device_get_match_data)(const struct fwnode_handle *fwnode,
const struct device *dev);
@@ -109,6 +109,8 @@ struct fwnode_handle *device_get_named_child_node(struct device *dev,
struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode);
void fwnode_handle_put(struct fwnode_handle *fwnode);
+int fwnode_get_name(const struct fwnode_handle *fwnode, char *name, size_t len);
+
int fwnode_irq_get(struct fwnode_handle *fwnode, unsigned int index);
unsigned int device_get_child_node_count(struct device *dev);
This helper returns the name of the node. The name is primarily expected to be returned from a new fwnode operation meant for this purpose, but when no name is returned, the helper will also attempt to read a device property "name". Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> --- drivers/base/property.c | 26 ++++++++++++++++++++++++++ include/linux/fwnode.h | 3 +++ include/linux/property.h | 2 ++ 3 files changed, 31 insertions(+)