[PATCH v17 1/3] dt-bindings: perf: Add Broadcom Raspberry Pi AXI PMU definition

[Ian Rogers]

Add device tree bindings for the Broadcom Raspberry Pi AXI PMU block
found on BCM2835, BCM2711, and BCM2712 SoCs.

The hardware exposes two MMIO register blocks: the primary monitor
evaluates the System fabric and the secondary monitor evaluates the
VideoCore VPU fabric.

Co-developed-by: Dom Cobley <popcornmix at gmail.com>
Signed-off-by: Dom Cobley <popcornmix at gmail.com>
Signed-off-by: Ian Rogers <irogers at google.com>
---
 .../bindings/perf/brcm,bcm2835-axiperf.yaml   | 44 +++++++++++++++++++
 MAINTAINERS                                   |  7 +++
 2 files changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml

diff --git a/Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml b/Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml
new file mode 100644
index 000000000000..2f1f4f286ab5
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/brcm,bcm2835-axiperf.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2835/2711/2712 AXI Performance Monitor
+
+maintainers:
+  - Ian Rogers <irogers at google.com>
+
+description:
+  The Broadcom BCM2835 series (including BCM2711 and BCM2712) features hardware
+  performance monitors on the AXI bus for evaluating memory bandwidth and
+  system traffic. Two monitor register blocks are present: the primary monitor
+  evaluates the System fabric, while the secondary monitor evaluates the
+  VideoCore VPU fabric. This block is distinct from the BCM5301X AXI Trace
+  Module.
+
+properties:
+  compatible:
+    enum:
+      - brcm,bcm2711-axiperf
+      - brcm,bcm2712-axiperf
+      - brcm,bcm2835-axiperf
+
+  reg:
+    items:
+      - description: System monitor registers
+      - description: VPU monitor registers
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    pmu at 7e009800 {
+        compatible = "brcm,bcm2835-axiperf";
+        reg = <0x7e009800 0x100>,
+              <0x7ee08000 0x100>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 93abbb315065..b8a3cb005c91 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5338,6 +5338,13 @@ N:	bcm113*
 N:	bcm216*
 N:	kona
 
+BROADCOM BCM2835 AXI PMU DRIVER
+M:	Ian Rogers <irogers at google.com>
+L:	linux-perf-users at vger.kernel.org
+L:	linux-rpi-kernel at lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml
+
 BROADCOM BCM2835 CAMERA DRIVERS
 M:	Raspberry Pi Kernel Maintenance <kernel-list at raspberrypi.com>
 L:	linux-media at vger.kernel.org
-- 
2.56.0.385.gac671c819a-goog