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799656de MP |
1 | * CoreSight Components: |
2 | ||
3 | CoreSight components are compliant with the ARM CoreSight architecture | |
4 | specification and can be connected in various topologies to suit a particular | |
5 | SoCs tracing needs. These trace components can generally be classified as | |
6 | sinks, links and sources. Trace data produced by one or more sources flows | |
7 | through the intermediate links connecting the source to the currently selected | |
8 | sink. Each CoreSight component device should use these properties to describe | |
9 | its hardware characteristcs. | |
10 | ||
11 | * Required properties for all components *except* non-configurable replicators: | |
12 | ||
13 | * compatible: These have to be supplemented with "arm,primecell" as | |
14 | drivers are using the AMBA bus interface. Possible values include: | |
15 | - "arm,coresight-etb10", "arm,primecell"; | |
16 | - "arm,coresight-tpiu", "arm,primecell"; | |
17 | - "arm,coresight-tmc", "arm,primecell"; | |
18 | - "arm,coresight-funnel", "arm,primecell"; | |
19 | - "arm,coresight-etm3x", "arm,primecell"; | |
e5742ef1 | 20 | - "arm,coresight-etm4x", "arm,primecell"; |
620cf787 | 21 | - "qcom,coresight-replicator1x", "arm,primecell"; |
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22 | |
23 | * reg: physical base address and length of the register | |
24 | set(s) of the component. | |
25 | ||
70dd9d2f LW |
26 | * clocks: the clocks associated to this component. |
27 | ||
28 | * clock-names: the name of the clocks referenced by the code. | |
29 | Since we are using the AMBA framework, the name of the clock | |
30 | providing the interconnect should be "apb_pclk", and some | |
31 | coresight blocks also have an additional clock "atclk", which | |
32 | clocks the core of that coresight component. The latter clock | |
33 | is optional. | |
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34 | |
35 | * port or ports: The representation of the component's port | |
36 | layout using the generic DT graph presentation found in | |
37 | "bindings/graph.txt". | |
38 | ||
39 | * Required properties for devices that don't show up on the AMBA bus, such as | |
40 | non-configurable replicators: | |
41 | ||
42 | * compatible: Currently supported value is (note the absence of the | |
43 | AMBA markee): | |
44 | - "arm,coresight-replicator" | |
45 | ||
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46 | * port or ports: same as above. |
47 | ||
48 | * Optional properties for ETM/PTMs: | |
49 | ||
50 | * arm,cp14: must be present if the system accesses ETM/PTM management | |
51 | registers via co-processor 14. | |
52 | ||
53 | * cpu: the cpu phandle this ETM/PTM is affined to. When omitted the | |
54 | source is considered to belong to CPU0. | |
55 | ||
56 | * Optional property for TMC: | |
57 | ||
58 | * arm,buffer-size: size of contiguous buffer space for TMC ETR | |
59 | (embedded trace router) | |
60 | ||
61 | ||
62 | Example: | |
63 | ||
64 | 1. Sinks | |
65 | etb@20010000 { | |
66 | compatible = "arm,coresight-etb10", "arm,primecell"; | |
67 | reg = <0 0x20010000 0 0x1000>; | |
68 | ||
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69 | clocks = <&oscclk6a>; |
70 | clock-names = "apb_pclk"; | |
71 | port { | |
72 | etb_in_port: endpoint@0 { | |
73 | slave-mode; | |
74 | remote-endpoint = <&replicator_out_port0>; | |
75 | }; | |
76 | }; | |
77 | }; | |
78 | ||
79 | tpiu@20030000 { | |
80 | compatible = "arm,coresight-tpiu", "arm,primecell"; | |
81 | reg = <0 0x20030000 0 0x1000>; | |
82 | ||
83 | clocks = <&oscclk6a>; | |
84 | clock-names = "apb_pclk"; | |
85 | port { | |
86 | tpiu_in_port: endpoint@0 { | |
87 | slave-mode; | |
88 | remote-endpoint = <&replicator_out_port1>; | |
89 | }; | |
90 | }; | |
91 | }; | |
92 | ||
93 | 2. Links | |
94 | replicator { | |
95 | /* non-configurable replicators don't show up on the | |
96 | * AMBA bus. As such no need to add "arm,primecell". | |
97 | */ | |
98 | compatible = "arm,coresight-replicator"; | |
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99 | |
100 | ports { | |
101 | #address-cells = <1>; | |
102 | #size-cells = <0>; | |
103 | ||
104 | /* replicator output ports */ | |
105 | port@0 { | |
106 | reg = <0>; | |
107 | replicator_out_port0: endpoint { | |
108 | remote-endpoint = <&etb_in_port>; | |
109 | }; | |
110 | }; | |
111 | ||
112 | port@1 { | |
113 | reg = <1>; | |
114 | replicator_out_port1: endpoint { | |
115 | remote-endpoint = <&tpiu_in_port>; | |
116 | }; | |
117 | }; | |
118 | ||
119 | /* replicator input port */ | |
120 | port@2 { | |
121 | reg = <0>; | |
122 | replicator_in_port0: endpoint { | |
123 | slave-mode; | |
124 | remote-endpoint = <&funnel_out_port0>; | |
125 | }; | |
126 | }; | |
127 | }; | |
128 | }; | |
129 | ||
130 | funnel@20040000 { | |
131 | compatible = "arm,coresight-funnel", "arm,primecell"; | |
132 | reg = <0 0x20040000 0 0x1000>; | |
133 | ||
134 | clocks = <&oscclk6a>; | |
135 | clock-names = "apb_pclk"; | |
136 | ports { | |
137 | #address-cells = <1>; | |
138 | #size-cells = <0>; | |
139 | ||
140 | /* funnel output port */ | |
141 | port@0 { | |
142 | reg = <0>; | |
143 | funnel_out_port0: endpoint { | |
144 | remote-endpoint = | |
145 | <&replicator_in_port0>; | |
146 | }; | |
147 | }; | |
148 | ||
149 | /* funnel input ports */ | |
150 | port@1 { | |
151 | reg = <0>; | |
152 | funnel_in_port0: endpoint { | |
153 | slave-mode; | |
154 | remote-endpoint = <&ptm0_out_port>; | |
155 | }; | |
156 | }; | |
157 | ||
158 | port@2 { | |
159 | reg = <1>; | |
160 | funnel_in_port1: endpoint { | |
161 | slave-mode; | |
162 | remote-endpoint = <&ptm1_out_port>; | |
163 | }; | |
164 | }; | |
165 | ||
166 | port@3 { | |
167 | reg = <2>; | |
168 | funnel_in_port2: endpoint { | |
169 | slave-mode; | |
170 | remote-endpoint = <&etm0_out_port>; | |
171 | }; | |
172 | }; | |
173 | ||
174 | }; | |
175 | }; | |
176 | ||
177 | 3. Sources | |
178 | ptm@2201c000 { | |
179 | compatible = "arm,coresight-etm3x", "arm,primecell"; | |
180 | reg = <0 0x2201c000 0 0x1000>; | |
181 | ||
182 | cpu = <&cpu0>; | |
183 | clocks = <&oscclk6a>; | |
184 | clock-names = "apb_pclk"; | |
185 | port { | |
186 | ptm0_out_port: endpoint { | |
187 | remote-endpoint = <&funnel_in_port0>; | |
188 | }; | |
189 | }; | |
190 | }; | |
191 | ||
192 | ptm@2201d000 { | |
193 | compatible = "arm,coresight-etm3x", "arm,primecell"; | |
194 | reg = <0 0x2201d000 0 0x1000>; | |
195 | ||
196 | cpu = <&cpu1>; | |
197 | clocks = <&oscclk6a>; | |
198 | clock-names = "apb_pclk"; | |
199 | port { | |
200 | ptm1_out_port: endpoint { | |
201 | remote-endpoint = <&funnel_in_port1>; | |
202 | }; | |
203 | }; | |
204 | }; |