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    Subject[PATCH V2 5/6] coresight-stm: Bindings for System Trace Macrocell
    Date
    From: Mathieu Poirier <mathieu.poirier@linaro.org>

    The System Trace Macrocell (STM) is an IP block falling under the
    CoreSight umbrella. It's main purpose it so expose stimulus channels
    to any system component for the purpose of information logging.

    Bindings for this IP block adds a couple of items to the current
    mandatory definition for CoreSight components.

    Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
    Acked-by: Rob Herring <robh@kernel.org>
    Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
    ---
    .../devicetree/bindings/arm/coresight.txt | 28 ++++++++++++++++++++++
    1 file changed, 28 insertions(+)

    diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
    index 62938eb..93147c0c 100644
    --- a/Documentation/devicetree/bindings/arm/coresight.txt
    +++ b/Documentation/devicetree/bindings/arm/coresight.txt
    @@ -19,6 +19,7 @@ its hardware characteristcs.
    - "arm,coresight-etm3x", "arm,primecell";
    - "arm,coresight-etm4x", "arm,primecell";
    - "qcom,coresight-replicator1x", "arm,primecell";
    + - "arm,coresight-stm", "arm,primecell"; [1]

    * reg: physical base address and length of the register
    set(s) of the component.
    @@ -36,6 +37,14 @@ its hardware characteristcs.
    layout using the generic DT graph presentation found in
    "bindings/graph.txt".

    +* Additional required properties for System Trace Macrocells (STM):
    + * reg: along with the physical base address and length of the register
    + set as described above, another entry is required to describe the
    + mapping of the extended stimulus port area.
    +
    + * reg-names: the only acceptable values are "stm-base" and
    + "stm-stimulus-base", each corresponding to the areas defined in "reg".
    +
    * Required properties for devices that don't show up on the AMBA bus, such as
    non-configurable replicators:

    @@ -202,3 +211,22 @@ Example:
    };
    };
    };
    +
    +4. STM
    + stm@20100000 {
    + compatible = "arm,coresight-stm", "arm,primecell";
    + reg = <0 0x20100000 0 0x1000>,
    + <0 0x28000000 0 0x180000>;
    + reg-names = "stm-base", "stm-stimulus-base";
    +
    + clocks = <&soc_smc50mhz>;
    + clock-names = "apb_pclk";
    + port {
    + stm_out_port: endpoint {
    + remote-endpoint = <&main_funnel_in_port2>;
    + };
    + };
    + };
    +
    +[1]. There is currently two version of STM: STM32 and STM500. Both
    +have the same HW interface and as such don't need an explicit binding name.
    --
    1.9.1
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