From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Date: Tue, 7 Feb 2012 04:12:51 +0000 (+0800)
Subject: of: introduce helper to manage boolean
X-Git-Tag: v3.2.44~31
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2930913e3d0c2cf88c635063af8a4fc721d6e31a;p=thirdparty%2Fkernel%2Fstable.git

of: introduce helper to manage boolean

commit fa4d34ccd0914ac87336ea2c17e9370dfecef286 upstream.

of_property_read_bool

Search for a property in a device node.
Returns true if the property exist false otherwise.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/include/linux/of.h b/include/linux/of.h
index 4948552d60f5e..9bf9611878ab9 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -336,6 +336,22 @@ static inline int of_machine_is_compatible(const char *compat)
 #define of_match_node(_matches, _node)	NULL
 #endif /* CONFIG_OF */
 
+/**
+ * of_property_read_bool - Findfrom a property
+ * @np:		device node from which the property value is to be read.
+ * @propname:	name of the property to be searched.
+ *
+ * Search for a property in a device node.
+ * Returns true if the property exist false otherwise.
+ */
+static inline bool of_property_read_bool(const struct device_node *np,
+					 const char *propname)
+{
+	struct property *prop = of_find_property(np, propname, NULL);
+
+	return prop ? true : false;
+}
+
 static inline int of_property_read_u32(const struct device_node *np,
 				       const char *propname,
 				       u32 *out_value)