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    Subject[PATCH v2 2/4] Documentation: Add documentation for APM X-Gene SoC PMU DTS binding
    Date
    Documentation: Add documentation for APM X-Gene SoC PMU DTS binding

    Signed-off-by: Tai Nguyen <ttnguyen@apm.com>
    ---
    .../devicetree/bindings/perf/apm-xgene-pmu.txt | 116 +++++++++++++++++++++
    1 file changed, 116 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt

    diff --git a/Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt b/Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt
    new file mode 100644
    index 0000000..40dfd4e
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt
    @@ -0,0 +1,116 @@
    +* APM X-Gene SoC PMU bindings
    +
    +This is APM X-Gene SoC PMU (Performance Monitoring Unit) module.
    +The following PMU devices are supported:
    +
    + L3C - L3 cache controller
    + IOB - IO bridge
    + MCB - Memory controller bridge
    + MC - Memory controller
    +
    +The following section describes the SoC PMU DT node binding.
    +
    +Required properties:
    +- compatible : Shall be "apm,xgene-pmu" for revision 1 or
    + "apm,xgene-pmu-v2" for revision 2.
    +- regmap-csw : Regmap of the CPU switch fabric (CSW) resource.
    +- regmap-mcba : Regmap of the MCB-A (memory bridge) resource.
    +- regmap-mcbb : Regmap of the MCB-B (memory bridge) resource.
    +- reg : First resource shall be the CPU bus PMU resource.
    +- interrupts : Interrupt-specifier for PMU IRQ.
    +
    +Required properties for L3C subnode:
    +- compatible : Shall be "apm,xgene-pmu-l3c".
    +- reg : First resource shall be the L3C PMU resource.
    +- index : Instance number of the L3C PMU.
    +
    +Required properties for IOB subnode:
    +- compatible : Shall be "apm,xgene-pmu-iob".
    +- reg : First resource shall be the IOB PMU resource.
    +- index : Instance number of the IOB PMU.
    +
    +Required properties for MCB subnode:
    +- compatible : Shall be "apm,xgene-pmu-mcb".
    +- reg : First resource shall be the MCB PMU resource.
    +- index : Instance number of the MCB PMU.
    +
    +Required properties for MC subnode:
    +- compatible : Shall be "apm,xgene-pmu-mc".
    +- reg : First resource shall be the MC PMU resource.
    +- index : Instance number of the MC PMU.
    +
    +Example:
    + csw: csw@7e200000 {
    + compatible = "apm,xgene-csw", "syscon";
    + reg = <0x0 0x7e200000 0x0 0x1000>;
    + };
    +
    + mcba: mcba@7e700000 {
    + compatible = "apm,xgene-mcb", "syscon";
    + reg = <0x0 0x7e700000 0x0 0x1000>;
    + };
    +
    + mcbb: mcbb@7e720000 {
    + compatible = "apm,xgene-mcb", "syscon";
    + reg = <0x0 0x7e720000 0x0 0x1000>;
    + };
    +
    + pmu: pmu@78810000 {
    + compatible = "apm,xgene-pmu-v2";
    + #address-cells = <2>;
    + #size-cells = <2>;
    + ranges;
    + regmap-csw = <&csw>;
    + regmap-mcba = <&mcba>;
    + regmap-mcbb = <&mcbb>;
    + reg = <0x0 0x78810000 0x0 0x1000>;
    + interrupts = <0x0 0x22 0x4>;
    +
    + pmul3c@7e610000 {
    + compatible = "apm,xgene-pmu-l3c";
    + reg = <0x0 0x7e610000 0x0 0x1000>;
    + index = <0>;
    + };
    +
    + pmuiob@7e940000 {
    + compatible = "apm,xgene-pmu-iob";
    + reg = <0x0 0x7e940000 0x0 0x1000>;
    + index = <0>;
    + };
    +
    + pmucmcb@7e710000 {
    + compatible = "apm,xgene-pmu-mcb";
    + reg = <0x0 0x7e710000 0x0 0x1000>;
    + index = <0>;
    + };
    +
    + pmucmcb@7e730000 {
    + compatible = "apm,xgene-pmu-mcb";
    + reg = <0x0 0x7e730000 0x0 0x1000>;
    + index = <1>;
    + };
    +
    + pmucmc@7e810000 {
    + compatible = "apm,xgene-pmu-mc";
    + reg = <0x0 0x7e810000 0x0 0x1000>;
    + index = <0>;
    + };
    +
    + pmucmc@7e850000 {
    + compatible = "apm,xgene-pmu-mc";
    + reg = <0x0 0x7e850000 0x0 0x1000>;
    + index = <1>;
    + };
    +
    + pmucmc@7e890000 {
    + compatible = "apm,xgene-pmu-mc";
    + reg = <0x0 0x7e890000 0x0 0x1000>;
    + index = <2>;
    + };
    +
    + pmucmc@7e8d0000 {
    + compatible = "apm,xgene-pmu-mc";
    + reg = <0x0 0x7e8d0000 0x0 0x1000>;
    + index = <3>;
    + };
    + };
    --
    1.9.1
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