linux-kernel - [PATCH v2 2/2] dt-bindings: perf: starfive: Add StarLink PMU

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Date:   Tue, 14 Nov 2023 10:12:54 +0800
From:   Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
To:     Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>
CC:     Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>,
        Ley Foon Tan <leyfoon.tan@...rfivetech.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/2] dt-bindings: perf: starfive: Add StarLink PMU

Add device tree binding for StarFive's StarLink PMU (Performance
Monitor Unit).

Signed-off-by: Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
---
 .../bindings/perf/starfive,starlink-pmu.yaml  | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml

diff --git a/Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml b/Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml
new file mode 100644
index 000000000000..b164f6849055
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/starfive,starlink-pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive StarLink PMU
+
+maintainers:
+  - Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
+
+description:
+  StarFive's StarLink PMU integrates one or more CPU cores with a shared L3
+  memory system. The PMU support overflow interrupt, up to 16 programmable
+  64bit event counters, and an independent 64bit cycle counter.
+  StarLink PMU is accessed via MMIO.
+
+properties:
+  compatible:
+    const: starfive,starlink-pmu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        l3_pmu: pmu@...00000 {
+            compatible = "starfive,starlink-pmu";
+            reg = <0x0 0x12900000 0x0 0x10000>;
+            interrupts = <34>;
+        };
+    };
-- 
2.25.1