[PATCH 4/5] dt-bindings/perf: Add Arm CoreSight PMU

[Robin Murphy <robin.murphy@arm.com>]

Add a binding for implementations of the Arm CoreSight Performance
Monitoring Unit Architecture. Not to be confused with CoreSight debug
and trace, the PMU architecture defines a standard MMIO interface for
event counters similar to the CPU PMU architecture, where the
implementation and most of its features are discoverable through ID
registers.

CC: Rob Herring <robh+dt@kernel.org>
CC: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
CC: Conor Dooley <conor+dt@kernel.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
 .../bindings/perf/arm,coresight-pmu.yaml      | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/arm,coresight-pmu.yaml

diff --git a/Documentation/devicetree/bindings/perf/arm,coresight-pmu.yaml b/Documentation/devicetree/bindings/perf/arm,coresight-pmu.yaml
new file mode 100644
index 000000000000..12c7b28eee35
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/arm,coresight-pmu.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/arm,coresight-pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Arm Coresight Performance Monitoring Unit Architecture
+
+maintainers:
+  - Robin Murphy <robin.murphy@arm.com>
+
+properties:
+  compatible:
+    const: arm,coresight-pmu
+
+  reg:
+    items:
+      - description: Register page 0
+      - description: Register page 1 (if dual-page extension implemented)
+    minItems: 1
+
+  interrupts:
+    items:
+      - description: Overflow interrupt
+
+  cpus:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    minItems: 1
+    description: List of CPUs with which the PMU is associated, if applicable
+
+  arm,64-bit-atomic:
+    type: boolean
+    description: Register accesses are single-copy atomic at doubleword granularity
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
-- 
2.39.2.101.g768bb238c484.dirty