Now that we have generic helpers to match various generic
device attributes, provide wrappers to the class_find_device()
to lookup devices by individual properties. The new wrappers
except the lookup by devt, drops the "start" device pointer as
none of the existing users need it and the attributes are usually
unique. The idea is to stop the proliferation of custom match
functions to do generic attribute matching.
So now we have :
class_find_device_by_name
class_find_device_by_of_node
class_find_device_by_fwnode
class_find_device_by_devt
Cc: Alessandro Zummo <[email protected]>
Cc: Alexander Aring <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Alexandre Belloni <[email protected]>
Cc: Andrew Lunn <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dan Murphy <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Harald Freudenberger <[email protected]>
Cc: Heikki Krogerus <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Heiner Kallweit <[email protected]>
Cc: Jacek Anaszewski <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Mark Brown <[email protected]>
Cc: Maxime Coquelin <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Peter Rosin <[email protected]>
Cc: Stefan Schmidt <[email protected]>
Cc: Tomas Winkler <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Signed-off-by: Suzuki K Poulose <[email protected]>
---
include/linux/device.h | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/include/linux/device.h b/include/linux/device.h
index 8c8727b..4396edc 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -474,6 +474,57 @@ extern struct device *class_find_device(struct class
*class,
struct device *start, const void *data,
int (*match)(struct device *, const
void *));
+/**
+ * class_find_device_by_name - device iterator for locating a particular device
+ * of a specific name.
+ * @class: class type
+ * @name: name of the device to match
+ */
+static inline struct device *class_find_device_by_name(struct class *class,
+ const char *name)
+{
+ return class_find_device(class, NULL, name, device_match_name);
+}
+
+/**
+ * class_find_device_by_of_node : device iterator for locating a particular
device
+ * matching the of_node.
+ * @class: class type
+ * @np: of_node of the device to match.
+ */
+static inline struct device *
+class_find_device_by_of_node(struct class *class, const struct device_node *np)
+{
+ return class_find_device(class, NULL, np, device_match_of_node);
+}
+
+/**
+ * class_find_device_by_fwnode : device iterator for locating a particular
device
+ * matching the fwnode.
+ * @class: class type
+ * @fwnode: fwnode of the device to match.
+ */
+static inline struct device *
+class_find_device_by_fwnode(struct class *class,
+ const struct fwnode_handle *fwnode)
+{
+ return class_find_device(class, NULL, fwnode, device_match_fwnode);
+}
+
+/**
+ * class_find_device_by_devt : device iterator for locating a particular device
+ * matching the device type.
+ * @class: class type
+ * @start: device to start search from
+ * @devt: device type of the device to match.
+ */
+static inline struct device *class_find_device_by_devt(struct class *class,
+ struct device *start,
+ dev_t devt)
+{
+ return class_find_device(class, start, &devt, device_match_devt);
+}
+
struct class_attribute {
struct attribute attr;
ssize_t (*show)(struct class *class, struct class_attribute *attr,
--
2.7.4
