1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/arm/qcom,coresight-tpda.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: Trace, Profiling and Diagnostics Aggregator - TPDA
9
10description: |
11  TPDAs are responsible for packetization and timestamping of data sets
12  utilizing the MIPI STPv2 packet protocol. Pulling data sets from one or
13  more attached TPDM and pushing the resultant (packetized) data out a
14  master ATB interface. Performing an arbitrated ATB interleaving (funneling)
15  task for free-flowing data from TPDM (i.e. CMB and DSB data set flows).
16
17  There is no strict binding between TPDM and TPDA. TPDA can have multiple
18  TPDMs connect to it. But There must be only one TPDA in the path from the
19  TPDM source to TMC sink. TPDM can directly connect to TPDA's inport or
20  connect to funnel which will connect to TPDA's inport.
21
22  We can use the commands are similar to the below to validate TPDMs.
23  Enable coresight sink first.
24
25  echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
26  echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
27  echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
28  echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
29
30  The test data will be collected in the coresight sink which is enabled.
31  If rwp register of the sink is keeping updating when do integration_test
32  (by cat tmc_etf0/mgmt/rwp), it means there is data generated from TPDM
33  to sink.
34
35maintainers:
36  - Mao Jinlong <[email protected]>
37  - Tao Zhang <[email protected]>
38
39# Need a custom select here or 'arm,primecell' will match on lots of nodes
40select:
41  properties:
42    compatible:
43      contains:
44        enum:
45          - qcom,coresight-tpda
46  required:
47    - compatible
48
49properties:
50  $nodename:
51    pattern: "^tpda(@[0-9a-f]+)$"
52  compatible:
53    items:
54      - const: qcom,coresight-tpda
55      - const: arm,primecell
56
57  reg:
58    maxItems: 1
59
60  clocks:
61    maxItems: 1
62
63  clock-names:
64    items:
65      - const: apb_pclk
66
67  in-ports:
68    description: |
69      Input connections from TPDM to TPDA
70    $ref: /schemas/graph.yaml#/properties/ports
71
72  out-ports:
73    description: |
74      Output connections from the TPDA to legacy CoreSight trace bus.
75    $ref: /schemas/graph.yaml#/properties/ports
76
77    properties:
78      port:
79        description:
80          Output connection from the TPDA to legacy CoreSight Trace bus.
81        $ref: /schemas/graph.yaml#/properties/port
82
83required:
84  - compatible
85  - reg
86  - clocks
87  - clock-names
88  - in-ports
89  - out-ports
90
91additionalProperties: false
92
93examples:
94  # minimum tpda definition.
95  - |
96    tpda@6004000 {
97      compatible = "qcom,coresight-tpda", "arm,primecell";
98      reg = <0x6004000 0x1000>;
99
100      clocks = <&aoss_qmp>;
101      clock-names = "apb_pclk";
102
103      in-ports {
104        #address-cells = <1>;
105        #size-cells = <0>;
106
107        port@0 {
108          reg = <0>;
109          tpda_qdss_0_in_tpdm_dcc: endpoint {
110            remote-endpoint = <&tpdm_dcc_out_tpda_qdss_0>;
111          };
112        };
113      };
114
115      out-ports {
116        port {
117          tpda_qdss_out_funnel_in0: endpoint {
118            remote-endpoint = <&funnel_in0_in_tpda_qdss>;
119          };
120        };
121      };
122    };
123
124...
125