2 files changed, 27 insertions, 0 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 80c9deca5f35..9bd7c4a31253 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -117,6 +117,32 @@ int of_device_is_compatible(const struct device_node *device,
 EXPORT_SYMBOL(of_device_is_compatible);
 
 /**
+ *  of_device_is_available - check if a device is available for use
+ *
+ *  @device: Node to check for availability
+ *
+ *  Returns 1 if the status property is absent or set to "okay" or "ok",
+ *  0 otherwise
+ */
+int of_device_is_available(const struct device_node *device)
+{
+        const char *status;
+        int statlen;
+
+        status = of_get_property(device, "status", &statlen);
+        if (status == NULL)
+                return 1;
+
+        if (statlen > 0) {
+                if (!strcmp(status, "okay") || !strcmp(status, "ok"))
+                        return 1;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL(of_device_is_available);
+
+/**
  *      of_get_parent - Get a node's parent if any
  *      @node:  Node to get parent
  *
diff --git a/include/linux/of.h b/include/linux/of.h
index 6981016dcc25..59a61bdc98b6 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -62,6 +62,7 @@ extern struct property *of_find_property(const struct device_node *np,
                                          int *lenp);
 extern int of_device_is_compatible(const struct device_node *device,
                                    const char *);
+extern int of_device_is_available(const struct device_node *device);
 extern const void *of_get_property(const struct device_node *node,
                                 const char *name,
                                 int *lenp);