Merge commit '53633a893a06bd5a0c807287d9cc29337806eaf7' as 'dts/upstream'
diff --git a/dts/upstream/include/dt-bindings/phy/phy-cadence.h b/dts/upstream/include/dt-bindings/phy/phy-cadence.h
new file mode 100644
index 0000000..0671991
--- /dev/null
+++ b/dts/upstream/include/dt-bindings/phy/phy-cadence.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides constants for Cadence SERDES.
+ */
+
+#ifndef _DT_BINDINGS_CADENCE_SERDES_H
+#define _DT_BINDINGS_CADENCE_SERDES_H
+
+#define CDNS_SERDES_NO_SSC 0
+#define CDNS_SERDES_EXTERNAL_SSC 1
+#define CDNS_SERDES_INTERNAL_SSC 2
+
+/* Torrent */
+#define CDNS_TORRENT_REFCLK_DRIVER 0
+#define CDNS_TORRENT_DERIVED_REFCLK 1
+#define CDNS_TORRENT_RECEIVED_REFCLK 2
+
+/* Sierra */
+#define CDNS_SIERRA_PLL_CMNLC 0
+#define CDNS_SIERRA_PLL_CMNLC1 1
+#define CDNS_SIERRA_DERIVED_REFCLK 2
+
+#endif /* _DT_BINDINGS_CADENCE_SERDES_H */