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coresight: stm: Bindings for System Trace Macrocell

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2016-05-03 11:33:39 -06:00 committed by Greg Kroah-Hartman
parent a685d68328
commit 9eb933130d
1 changed files with 28 additions and 0 deletions
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28
Documentation/devicetree/bindings/arm/coresight.txt
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@ -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.