Add binding documentation for the Marvell CN10k DDR
performance monitor unit.

Signed-off-by: Bharat Bhushan <bbhushan2@marvell.com>
---
v1->v2:
 - DT binding changed to new DT Schema

 .../bindings/perf/marvell-cn10k-ddr.yaml      | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/marvell-cn10k-ddr.yaml

diff --git a/Documentation/devicetree/bindings/perf/marvell-cn10k-ddr.yaml b/Documentation/devicetree/bindings/perf/marvell-cn10k-ddr.yaml
new file mode 100644
index 000000000000..2a335444cf53
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/marvell-cn10k-ddr.yaml

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/marvell-cn10k-ddr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell CN10K DDR performance monitor
+
+maintainers:
+  - Bharat Bhushan <bbhushan2@marvell.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - marvell,cn10k-ddr-pmu
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        ddrcpmu@1 {