Commit 9eb93313 authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Greg Kroah-Hartman

coresight: stm: Bindings for System Trace Macrocell

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: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarChunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a685d683
...@@ -19,6 +19,7 @@ its hardware characteristcs. ...@@ -19,6 +19,7 @@ its hardware characteristcs.
- "arm,coresight-etm3x", "arm,primecell"; - "arm,coresight-etm3x", "arm,primecell";
- "arm,coresight-etm4x", "arm,primecell"; - "arm,coresight-etm4x", "arm,primecell";
- "qcom,coresight-replicator1x", "arm,primecell"; - "qcom,coresight-replicator1x", "arm,primecell";
- "arm,coresight-stm", "arm,primecell"; [1]
* reg: physical base address and length of the register * reg: physical base address and length of the register
set(s) of the component. set(s) of the component.
...@@ -36,6 +37,14 @@ its hardware characteristcs. ...@@ -36,6 +37,14 @@ its hardware characteristcs.
layout using the generic DT graph presentation found in layout using the generic DT graph presentation found in
"bindings/graph.txt". "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 * Required properties for devices that don't show up on the AMBA bus, such as
non-configurable replicators: non-configurable replicators:
...@@ -202,3 +211,22 @@ Example: ...@@ -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.
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