[PATCH 4/7] drivers: of: Add function to enable and register a device by alias

[Teresa Remmet <t.remmet@phytec.de>]

In some cases node names are not unique and passing the full path is really long.
So make add a new device by passing the alias string possible.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
---
 drivers/of/platform.c | 19 +++++++++++++++++++
 include/of.h          |  8 ++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index ef8969ca8b19..d3795d799a13 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -207,6 +207,25 @@ struct device_d *of_device_enable_and_register_by_name(const char *name)
 }
 EXPORT_SYMBOL(of_device_enable_and_register_by_name);
 
+/**
+ * of_device_enable_and_register_by_alias - Enable and register device by alias
+ * @name: alias of the device node
+ *
+ * Returns pointer to created platform device, or NULL if a device was not
+ * registered. Unavailable devices will not get registered.
+ */
+struct device_d *of_device_enable_and_register_by_alias(const char *alias)
+{
+	struct device_node *node;
+
+	node = of_find_node_by_alias(NULL, alias);
+	if (!node)
+		return NULL;
+
+	return of_device_enable_and_register(node);
+}
+EXPORT_SYMBOL(of_device_enable_and_register_by_alias);
+
 #ifdef CONFIG_ARM_AMBA
 static struct device_d *of_amba_device_create(struct device_node *np)
 {
diff --git a/include/of.h b/include/of.h
index 184acb474136..b5f54dd4e5b5 100644
--- a/include/of.h
+++ b/include/of.h
@@ -255,6 +255,8 @@ extern int of_platform_populate(struct device_node *root,
 extern struct device_d *of_find_device_by_node(struct device_node *np);
 extern struct device_d *of_device_enable_and_register(struct device_node *np);
 extern struct device_d *of_device_enable_and_register_by_name(const char *name);
+extern struct device_d *of_device_enable_and_register_by_alias(
+							const char *alias);
 
 struct cdev *of_parse_partition(struct cdev *cdev, struct device_node *node);
 int of_parse_partitions(struct cdev *cdev, struct device_node *node);
@@ -670,6 +672,12 @@ static inline struct device_d *of_device_enable_and_register_by_name(
 	return NULL;
 }
 
+static inline struct device_d *of_device_enable_and_register_by_alias(
+				const char *alias)
+{
+	return NULL;
+}
+
 static inline int of_register_fixup(int (*fixup)(struct device_node *, void *),
 				void *context)
 {
-- 
2.7.4


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