Merge commit '53633a893a06bd5a0c807287d9cc29337806eaf7' as 'dts/upstream'
diff --git a/dts/upstream/include/dt-bindings/phy/phy-am654-serdes.h b/dts/upstream/include/dt-bindings/phy/phy-am654-serdes.h
new file mode 100644
index 0000000..e8d9017
--- /dev/null
+++ b/dts/upstream/include/dt-bindings/phy/phy-am654-serdes.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides constants for AM654 SERDES.
+ */
+
+#ifndef _DT_BINDINGS_AM654_SERDES
+#define _DT_BINDINGS_AM654_SERDES
+
+#define AM654_SERDES_CMU_REFCLK 0
+#define AM654_SERDES_LO_REFCLK 1
+#define AM654_SERDES_RO_REFCLK 2
+
+#endif /* _DT_BINDINGS_AM654_SERDES */