linux-kernel - [PATCH v8 3/4] dt-binding: perf: Add Amlogic DDR PMU

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Message-ID: <20220916020320.2455580-3-jiucheng.xu@amlogic.com>
Date:   Fri, 16 Sep 2022 10:03:19 +0800
From:   Jiucheng Xu <jiucheng.xu@...ogic.com>
To:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-amlogic@...ts.infradead.org>, <devicetree@...r.kernel.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Chris Healy <cphealy@...il.com>,
        Jianxin Pan <jianxin.pan@...ogic.com>,
        Kelvin Zhang <kelvin.zhang@...ogic.com>,
        Jiucheng Xu <jiucheng.xu@...ogic.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v8 3/4] dt-binding: perf: Add Amlogic DDR PMU

Add binding documentation for the Amlogic G12 series DDR
performance monitor unit.

Signed-off-by: Jiucheng Xu <jiucheng.xu@...ogic.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
Changes v7 -> v8:
  - No change

Changes v6 -> v7:
  - No change

Changes v5 -> v6:
  - remove blank line

Changes v4 -> v5:
  - Remove "items" in compatible since have only one item
  - Condense description of reg
  - Rename node
  - Split one reg into two reg items.
  - Binding go first
 
Changes v3 -> v4:
  - Fix "$id: relative path/filename doesn't match actual path or
    filename" warning

Changes v2 -> v3:
  - Remove oneOf
  - Add descriptions
  - Fix compiling warning

Changes v1 -> v2:
  - Rename file, from aml_ddr_pmu.yaml to amlogic,g12_ddr_pmu.yaml
  - Delete "model", "dmc_nr", "chann_nr" new properties
  - Fix compiling error
---
 .../bindings/perf/amlogic,g12-ddr-pmu.yaml    | 54 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml

diff --git a/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml b/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
new file mode 100644
index 000000000000..50f46a6898b1
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/perf/amlogic,g12-ddr-pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic G12 DDR performance monitor
+
+maintainers:
+  - Jiucheng Xu <jiucheng.xu@...ogic.com>
+
+description: |
+  Amlogic G12 series SoC integrate DDR bandwidth monitor.
+  A timer is inside and can generate interrupt when timeout.
+  The bandwidth is counted in the timer ISR. Different platform
+  has different subset of event format attribute.
+
+properties:
+  compatible:
+    enum:
+      - amlogic,g12a-ddr-pmu
+      - amlogic,g12b-ddr-pmu
+      - amlogic,sm1-ddr-pmu
+
+  reg:
+    items:
+      - description: DMC bandwidth register space.
+      - description: DMC PLL register space.
+
+  interrupts:
+    items:
+      - description: The IRQ of the inside timer timeout.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    pmu {
+        #address-cells=<2>;
+        #size-cells=<2>;
+
+        pmu@...38000 {
+            compatible = "amlogic,g12a-ddr-pmu";
+            reg = <0x0 0xff638000 0x0 0x100>,
+                  <0x0 0xff638c00 0x0 0x100>;
+            interrupts = <GIC_SPI 52 IRQ_TYPE_EDGE_RISING>;
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 5ed563368a48..b03e821a9e3c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1056,6 +1056,7 @@ L:	linux-amlogic@...ts.infradead.org
 S:	Supported
 W:	http://www.amlogic.com
 F:	Documentation/admin-guide/perf/meson-ddr-pmu.rst
+F:	Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
 F:	drivers/perf/amlogic/
 F:	include/soc/amlogic/
 
-- 
2.25.1