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Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index ec56739eb247..dba995b70b84 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -144,6 +144,27 @@ int of_device_is_compatible(const struct device_node *device,
EXPORT_SYMBOL(of_device_is_compatible);
/**
+ * machine_is_compatible - Test root of device tree for a given compatible value
+ * @compat: compatible string to look for in root node's compatible property.
+ *
+ * Returns true if the root node has the given value in its
+ * compatible property.
+ */
+int machine_is_compatible(const char *compat)
+{
+ struct device_node *root;
+ int rc = 0;
+
+ root = of_find_node_by_path("/");
+ if (root) {
+ rc = of_device_is_compatible(root, compat);
+ of_node_put(root);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(machine_is_compatible);
+
+/**
* of_device_is_available - check if a device is available for use
*
* @device: Node to check for availability