diff options
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r-- | Documentation/devicetree/bindings/arm/coresight.txt | 120 |
1 files changed, 65 insertions, 55 deletions
diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt index 5d1ad09bafb4..f8aff65ab921 100644 --- a/Documentation/devicetree/bindings/arm/coresight.txt +++ b/Documentation/devicetree/bindings/arm/coresight.txt @@ -54,9 +54,7 @@ its hardware characteristcs. clocks the core of that coresight component. The latter clock is optional. - * port or ports: The representation of the component's port - layout using the generic DT graph presentation found in - "bindings/graph.txt". + * port or ports: see "Graph bindings for Coresight" below. * Additional required properties for System Trace Macrocells (STM): * reg: along with the physical base address and length of the register @@ -73,7 +71,7 @@ its hardware characteristcs. AMBA markee): - "arm,coresight-replicator" - * port or ports: same as above. + * port or ports: see "Graph bindings for Coresight" below. * Optional properties for ETM/PTMs: @@ -96,6 +94,20 @@ its hardware characteristcs. * interrupts : Exactly one SPI may be listed for reporting the address error +Graph bindings for Coresight +------------------------------- + +Coresight components are interconnected to create a data path for the flow of +trace data generated from the "sources" to their collection points "sink". +Each coresight component must describe the "input" and "output" connections. +The connections must be described via generic DT graph bindings as described +by the "bindings/graph.txt", where each "port" along with an "endpoint" +component represents a hardware port and the connection. + + * All output ports must be listed inside a child node named "out-ports" + * All input ports must be listed inside a child node named "in-ports". + * Port address must match the hardware port number. + Example: 1. Sinks @@ -105,10 +117,11 @@ Example: clocks = <&oscclk6a>; clock-names = "apb_pclk"; - port { - etb_in_port: endpoint@0 { - slave-mode; - remote-endpoint = <&replicator_out_port0>; + in-ports { + port { + etb_in_port: endpoint@0 { + remote-endpoint = <&replicator_out_port0>; + }; }; }; }; @@ -119,10 +132,11 @@ Example: clocks = <&oscclk6a>; clock-names = "apb_pclk"; - port { - tpiu_in_port: endpoint@0 { - slave-mode; - remote-endpoint = <&replicator_out_port1>; + in-ports { + port { + tpiu_in_port: endpoint@0 { + remote-endpoint = <&replicator_out_port1>; + }; }; }; }; @@ -133,22 +147,16 @@ Example: clocks = <&oscclk6a>; clock-names = "apb_pclk"; - ports { - #address-cells = <1>; - #size-cells = <0>; - - /* input port */ - port@0 { - reg = <0>; + in-ports { + port { etr_in_port: endpoint { - slave-mode; remote-endpoint = <&replicator2_out_port0>; }; }; + }; - /* CATU link represented by output port */ - port@1 { - reg = <1>; + out-ports { + port { etr_out_port: endpoint { remote-endpoint = <&catu_in_port>; }; @@ -163,7 +171,7 @@ Example: */ compatible = "arm,coresight-replicator"; - ports { + out-ports { #address-cells = <1>; #size-cells = <0>; @@ -181,12 +189,11 @@ Example: remote-endpoint = <&tpiu_in_port>; }; }; + }; - /* replicator input port */ - port@2 { - reg = <0>; + in-ports { + port { replicator_in_port0: endpoint { - slave-mode; remote-endpoint = <&funnel_out_port0>; }; }; @@ -199,40 +206,36 @@ Example: clocks = <&oscclk6a>; clock-names = "apb_pclk"; - ports { - #address-cells = <1>; - #size-cells = <0>; - - /* funnel output port */ - port@0 { - reg = <0>; + out-ports { + port { funnel_out_port0: endpoint { remote-endpoint = <&replicator_in_port0>; }; }; + }; - /* funnel input ports */ - port@1 { + in-ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { reg = <0>; funnel_in_port0: endpoint { - slave-mode; remote-endpoint = <&ptm0_out_port>; }; }; - port@2 { + port@1 { reg = <1>; funnel_in_port1: endpoint { - slave-mode; remote-endpoint = <&ptm1_out_port>; }; }; - port@3 { + port@2 { reg = <2>; funnel_in_port2: endpoint { - slave-mode; remote-endpoint = <&etm0_out_port>; }; }; @@ -248,9 +251,11 @@ Example: cpu = <&cpu0>; clocks = <&oscclk6a>; clock-names = "apb_pclk"; - port { - ptm0_out_port: endpoint { - remote-endpoint = <&funnel_in_port0>; + out-ports { + port { + ptm0_out_port: endpoint { + remote-endpoint = <&funnel_in_port0>; + }; }; }; }; @@ -262,9 +267,11 @@ Example: cpu = <&cpu1>; clocks = <&oscclk6a>; clock-names = "apb_pclk"; - port { - ptm1_out_port: endpoint { - remote-endpoint = <&funnel_in_port1>; + out-ports { + port { + ptm1_out_port: endpoint { + remote-endpoint = <&funnel_in_port1>; + }; }; }; }; @@ -278,9 +285,11 @@ Example: clocks = <&soc_smc50mhz>; clock-names = "apb_pclk"; - port { - stm_out_port: endpoint { - remote-endpoint = <&main_funnel_in_port2>; + out-ports { + port { + stm_out_port: endpoint { + remote-endpoint = <&main_funnel_in_port2>; + }; }; }; }; @@ -295,10 +304,11 @@ Example: clock-names = "apb_pclk"; interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>; - port { - catu_in_port: endpoint { - slave-mode; - remote-endpoint = <&etr_out_port>; + in-ports { + port { + catu_in_port: endpoint { + remote-endpoint = <&etr_out_port>; + }; }; }; }; |