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    Subject[PATCH V4 4/6] dt-bindings: csky: Add csky PMU bindings
    Date
    This patch adds the documentation to describe that how to add pmu node in
    dts.

    Signed-off-by: Mao Han <han_mao@c-sky.com>
    Cc: Rob Herring <robh+dt@kernel.org>
    Cc: Guo Ren <guoren@kernel.org>
    ---
    Documentation/devicetree/bindings/csky/pmu.txt | 38 ++++++++++++++++++++++++++
    1 file changed, 38 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/csky/pmu.txt

    diff --git a/Documentation/devicetree/bindings/csky/pmu.txt b/Documentation/devicetree/bindings/csky/pmu.txt
    new file mode 100644
    index 0000000..53c3b0a
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/csky/pmu.txt
    @@ -0,0 +1,38 @@
    +============================
    +C-SKY Performance Monitor Units
    +============================
    +
    +C-SKY 8xx series cores often have a PMU for counting cpu and cache events.
    +The C-SKY PMU representation in the device tree should be done as under:
    +
    +==============================
    +PMU node bindings definition
    +==============================
    +
    + Description: Describes PMU
    +
    + PROPERTIES
    +
    + - compatible
    + Usage: required
    + Value type: <string>
    + Definition: must be "csky,csky-pmu"
    + - interrupts
    + Usage: required
    + Value type: <u32>
    + Definition: must be pmu irq num defined by soc
    + - count-width
    + Usage: optional
    + Value type: <u32>
    + Definition: the width of pmu counter
    +
    +Examples:
    +---------
    +
    + pmu {
    + compatible = "csky,csky-pmu";
    + interrupts = <0x17 IRQ_TYPE_EDGE_RISING>;
    + interrupt-parent = <&intc>;
    + count-width = <0x30>;
    + };
    +
    --
    2.7.4
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