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authorAdam Thomson <Adam.Thomson.Opensource@diasemi.com>2016-06-21 20:50:20 +0300
committerMark Brown <broonie@kernel.org>2016-06-26 14:39:03 +0300
commit613e97218ccbd7f33895cad4525d861810a9d5d5 (patch)
tree2e13158ccc751520e2f69f030c3c98814e318768 /include/linux/property.h
parent1a695a905c18548062509178b98bc91e67510864 (diff)
downloadlinux-613e97218ccbd7f33895cad4525d861810a9d5d5.tar.xz
device property: Add function to search for named child of device
For device nodes in both DT and ACPI, it possible to have named child nodes which contain properties (an existing example being gpio-leds). This adds a function to find a named child node for a device which can be used by drivers for property retrieval. For DT data node name matching, of_node_cmp() and similar functions are made available outside of CONFIG_OF block so the new function can reference these for DT and non-DT builds. For ACPI data node name matching, a helper function is also added which returns false if CONFIG_ACPI is not set, otherwise it performs a string comparison on the data node name. This avoids using the acpi_data_node struct for non CONFIG_ACPI builds, which would otherwise cause a build failure. Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Acked-by: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/property.h')
-rw-r--r--include/linux/property.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/property.h b/include/linux/property.h
index ecab11e40794..3a2f9ae25c86 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -77,6 +77,9 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev,
for (child = device_get_next_child_node(dev, NULL); child; \
child = device_get_next_child_node(dev, child))
+struct fwnode_handle *device_get_named_child_node(struct device *dev,
+ const char *childname);
+
void fwnode_handle_put(struct fwnode_handle *fwnode);
unsigned int device_get_child_node_count(struct device *dev);