[PATCH v3 07/16] device property: Add fwnode_handle_get()
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: 2017-02-23 16:19:27
Also in:
linux-acpi
Subsystem:
driver core, kobjects, debugfs and sysfs, software nodes and device properties, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
fwnode_handle_get() is used to obtain a reference to a fwnode_handle container. In this case this is OF specific struct device_node. This complements fwnode_handle_put() which is already implemented. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> --- drivers/base/property.c | 11 +++++++++++ include/linux/property.h | 1 + 2 files changed, 12 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 63a30dc..760c6c5 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c@@ -976,6 +976,17 @@ struct fwnode_handle *device_get_named_child_node(struct device *dev, EXPORT_SYMBOL_GPL(device_get_named_child_node); /** + * fwnode_handle_get - Obtain a reference to a device node + * @fwnode: Pointer to the device node to obtain the reference to. + */ +void fwnode_handle_get(struct fwnode_handle *fwnode) +{ + if (is_of_node(fwnode)) + of_node_get(to_of_node(fwnode)); +} +EXPORT_SYMBOL_GPL(fwnode_handle_get); + +/** * fwnode_handle_put - Drop reference to a device node * @fwnode: Pointer to the device node to drop the reference to. *
diff --git a/include/linux/property.h b/include/linux/property.h
index 86c47ad..b4b1545 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h@@ -90,6 +90,7 @@ struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode, struct fwnode_handle *device_get_named_child_node(struct device *dev, const char *childname); +void fwnode_handle_get(struct fwnode_handle *fwnode); void fwnode_handle_put(struct fwnode_handle *fwnode); unsigned int device_get_child_node_count(struct device *dev);
--
2.7.4