[PATCH v4 1/2] dt-bindings: perf: marvell: Add CN20K DDR PMU binding

[Geetha sowjanya]

Marvell CN20K SoCs integrate a DDR Performance Monitoring Unit (PMU)
associated with the DDR controller. The block provides hardware counters
to monitor DDR traffic and performance events and is accessed via a
dedicated MMIO region.

The CN20K DDR PMU is functionally equivalent to the CN10K DDR PMU, with
minor register offset differences. This binding documents the CN20K
variant and introduces a specific compatible string to allow software
to distinguish between the two implementations.

Signed-off-by: Geetha sowjanya <gakula@xxxxxxxxxxx>
---
 .../bindings/perf/marvell-cn20k-ddr-pmu.yaml  | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/marvell-cn20k-ddr-pmu.yaml

diff --git a/Documentation/devicetree/bindings/perf/marvell-cn20k-ddr-pmu.yaml b/Documentation/devicetree/bindings/perf/marvell-cn20k-ddr-pmu.yaml
new file mode 100644
index 000000000000..78a0cd9a7b1f
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/marvell-cn20k-ddr-pmu.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/marvell-cn20k-ddr-pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell CN20K DDR performance monitor
+
+description:
+  Performance Monitoring Unit (PMU) for the DDR controller
+  in Marvell CN20K SoCs.
+
+maintainers:
+  - Geetha sowjanya <gakula@xxxxxxxxxxx>
+
+properties:
+  compatible:
+    const: marvell,cn20k-ddr-pmu
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        ddr-pmu@c200000000 {
+            compatible = "marvell,cn20k-ddr-pmu";
+            reg = <0xc200 0x00000000 0x0 0x100000>;
+        };
+    };
-- 
2.25.1