v4.19.13 snapshot.
diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c
new file mode 100644
index 0000000..cd8f413
--- /dev/null
+++ b/drivers/soc/tegra/common.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+
+#include <soc/tegra/common.h>
+
+static const struct of_device_id tegra_machine_match[] = {
+ { .compatible = "nvidia,tegra20", },
+ { .compatible = "nvidia,tegra30", },
+ { .compatible = "nvidia,tegra114", },
+ { .compatible = "nvidia,tegra124", },
+ { .compatible = "nvidia,tegra132", },
+ { .compatible = "nvidia,tegra210", },
+ { }
+};
+
+bool soc_is_tegra(void)
+{
+ struct device_node *root;
+
+ root = of_find_node_by_path("/");
+ if (!root)
+ return false;
+
+ return of_match_node(tegra_machine_match, root) != NULL;
+}