summaryrefslogtreecommitdiff
path: root/drivers/base/property.c
diff options
context:
space:
mode:
authorHeikki Krogerus <heikki.krogerus@linux.intel.com>2019-05-31 17:15:39 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-06-03 11:55:38 +0300
commit83b34afb6b79c69f5478a7249451cab858af97d6 (patch)
tree25a2f8fb4a1619077fefb0a864d9bb640a939085 /drivers/base/property.c
parentee48cef6c3917092eeee230caaa508d0e487c288 (diff)
downloadlinux-83b34afb6b79c69f5478a7249451cab858af97d6.tar.xz
device property: Introduce fwnode_find_reference()
In most cases the references that the drivers look for don't have any arguments. This introduces a wrapper function for fwnode_property_get_reference_args() that looks for references by using only the name and index. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/property.c')
-rw-r--r--drivers/base/property.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 348b37e64944..81bd01ed4042 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -485,6 +485,30 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args);
/**
+ * fwnode_find_reference - Find named reference to a fwnode_handle
+ * @fwnode: Firmware node where to look for the reference
+ * @name: The name of the reference
+ * @index: Index of the reference
+ *
+ * @index can be used when the named reference holds a table of references.
+ *
+ * Returns pointer to the reference fwnode, or ERR_PTR. Caller is responsible to
+ * call fwnode_handle_put() on the returned fwnode pointer.
+ */
+struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
+ const char *name,
+ unsigned int index)
+{
+ struct fwnode_reference_args args;
+ int ret;
+
+ ret = fwnode_property_get_reference_args(fwnode, name, NULL, 0, index,
+ &args);
+ return ret ? ERR_PTR(ret) : args.fwnode;
+}
+EXPORT_SYMBOL_GPL(fwnode_find_reference);
+
+/**
* device_remove_properties - Remove properties from a device object.
* @dev: Device whose properties to remove.
*