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

Documentation/devicetree/bindings/arm/coresight.txt

+28 −0
Original line number Original line Diff line number Diff line
@@ -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. 
	  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: 
			};

			};

		};

		};

	};

	};



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.