[PATCH 1/3] dt-bindings: perf: Describe the Broadcom BCM5301X AXI PMU

[Florian Fainelli <florian.fainelli@broadcom.com>]

Describe one APB register window per AXI Trace Module. The counters are
have no overflow IRQ.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 .../bindings/perf/brcm,bcm5301x-axi-pmu.yaml  | 43 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/brcm,bcm5301x-axi-pmu.yaml

diff --git a/Documentation/devicetree/bindings/perf/brcm,bcm5301x-axi-pmu.yaml b/Documentation/devicetree/bindings/perf/brcm,bcm5301x-axi-pmu.yaml
new file mode 100644
index 000000000000..686b20d4cd29
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/brcm,bcm5301x-axi-pmu.yaml
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/brcm,bcm5301x-axi-pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM5301X AXI Trace Module performance monitor
+
+maintainers:
+  - Florian Fainelli <florian.fainelli@broadcom.com>
+
+description: |
+  The BCM5301X ARM subsystem contains three AXI Trace Modules, monitoring the
+  two PL310 AXI master interfaces and the Accelerator Coherency Port (ACP).
+  Each module has its own APB register window and fixed performance counters
+  for commands, data beats, channel activity and stalls, latency, and cycles
+  with outstanding commands. Counters support local start, stop, and clear
+  commands. No counter overflow interrupt is provided.
+
+  Each node describes one module. The separate ATB trace output and its
+  CoreSight connections are outside the scope of this binding. This block
+  is distinct from the BCM2835 family AXI bus-watcher performance monitor.
+
+properties:
+  compatible:
+    const: brcm,bcm5301x-axi-pmu
+
+  reg:
+    maxItems: 1
+    description: APB register window of one AXI Trace Module.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    pmu@19003000 {
+        compatible = "brcm,bcm5301x-axi-pmu";
+        reg = <0x19003000 0x1000>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index f53047aa8d3c..b97f22107fbf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5220,6 +5220,7 @@ M:	Rafał Miłecki <zajec5@gmail.com>
 R:	Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
+F:	Documentation/devicetree/bindings/perf/brcm,bcm5301x-axi-pmu.yaml
 F:	arch/arm/boot/dts/broadcom/bcm-ns.dtsi
 F:	arch/arm/boot/dts/broadcom/bcm470*
 F:	arch/arm/boot/dts/broadcom/bcm5301*
-- 
2.53.0