[PATCH 5/7] of: Add of_alias_get function

[Sascha Hauer <s.hauer@pengutronix.de>]

This is used to retrieve the name of the alias for a given
devicenode.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/of/base.c | 13 +++++++++++++
 include/of.h      |  6 ++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index e2a8bb5..b58a19b 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -212,6 +212,19 @@ int of_alias_get_id(struct device_node *np, const char *stem)
 }
 EXPORT_SYMBOL_GPL(of_alias_get_id);
 
+const char *of_alias_get(struct device_node *np)
+{
+	struct property *pp;
+
+	list_for_each_entry(pp, &of_aliases->properties, list) {
+		if (!strcmp(np->full_name, pp->value))
+			return pp->name;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(of_alias_get);
+
 u64 of_translate_address(struct device_node *node, const __be32 *in_addr)
 {
 	struct property *p;
diff --git a/include/of.h b/include/of.h
index a804ec4..6c75cbd 100644
--- a/include/of.h
+++ b/include/of.h
@@ -178,6 +178,7 @@ struct cdev;
 int of_parse_partitions(struct cdev *cdev, struct device_node *node);
 
 int of_alias_get_id(struct device_node *np, const char *stem);
+const char *of_alias_get(struct device_node *np);
 int of_device_is_stdout_path(struct device_d *dev);
 const char *of_get_model(void);
 void *of_flatten_dtb(struct device_node *node);
@@ -197,6 +198,11 @@ static inline int of_alias_get_id(struct device_node *np, const char *stem)
 	return -ENOENT;
 }
 
+static inline const char *of_alias_get(struct device_node *np)
+{
+	return NULL;
+}
+
 static inline int of_device_is_stdout_path(struct device_d *dev)
 {
 	return 0;
-- 
1.8.2.rc2


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