[RFC,13/57] drivers: Add generic helper for matching device by fwnode
diff mbox series

Message ID 1559577023-558-14-git-send-email-suzuki.poulose@arm.com
State New, archived
Headers show
  • [RFC,01/57] drivers: s390/cio: Use driver_for_each_device
Related show

Commit Message

Suzuki K Poulose June 3, 2019, 3:49 p.m. UTC
Instead of spilling the match function to check the device fwnode
everywhere, let us add a generic helper which can be reused by all.
Also adds a wrapper for bus_find_device to find a device by fwnode.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
 drivers/base/core.c    |  6 ++++++
 include/linux/device.h | 15 +++++++++++++++
 2 files changed, 21 insertions(+)

diff mbox series

diff --git a/drivers/base/core.c b/drivers/base/core.c
index d20699c..141c4f8 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3334,3 +3334,9 @@  int device_match_of_node(struct device *dev, void *np)
 	return dev->of_node == np;
+int device_match_fwnode(struct device *dev, void *fwnode)
+	return dev_fwnode(dev) == fwnode;
diff --git a/include/linux/device.h b/include/linux/device.h
index fe16be4..54be931 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -164,6 +164,7 @@  struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
 void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
 int device_match_of_node(struct device *dev, void *np);
+int device_match_fwnode(struct device *dev, void *fwnode);
 int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
 		     int (*fn)(struct device *dev, void *data));
@@ -188,6 +189,20 @@  static inline struct device *bus_find_device_by_of_node(struct bus_type *bus,
 	return bus_find_device(bus, start, np, device_match_of_node);
+ * bus_find_device_by_fwnode : device iterator for locating a particular device
+ * matching the fwnode.
+ * @bus: bus type
+ * @start: Device to begin with
+ * @fwnode: fwnode of the device to match.
+ */
+static inline struct device *bus_find_device_by_fwnode(struct bus_type *bus,
+						       struct device *start,
+						       struct fwnode_handle *fwnode)
+	return bus_find_device(bus, start, fwnode, device_match_fwnode);
 struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
 					struct device *hint);
 int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,