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@@ -143,6 +143,27 @@ int of_device_is_compatible(const struct device_node *device,
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}
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EXPORT_SYMBOL(of_device_is_compatible);
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+/**
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+ * machine_is_compatible - Test root of device tree for a given compatible value
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+ * @compat: compatible string to look for in root node's compatible property.
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+ *
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+ * Returns true if the root node has the given value in its
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+ * compatible property.
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+ */
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+int machine_is_compatible(const char *compat)
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+{
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+ struct device_node *root;
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+ int rc = 0;
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+
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+ root = of_find_node_by_path("/");
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+ if (root) {
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+ rc = of_device_is_compatible(root, compat);
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+ of_node_put(root);
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+ }
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+ return rc;
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+}
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+EXPORT_SYMBOL(machine_is_compatible);
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+
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/**
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* of_device_is_available - check if a device is available for use
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*
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