Bindings/arm/qcom,coresight-tpdm.yaml

   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-tpdm.yaml#
   6 $schema: http://devicetree.org/meta-schemas/core.yaml#
   7
   8 title: Trace, Profiling and Diagnostics Monitor - TPDM
   9
  10 description: |
  11   The TPDM or Monitor serves as data collection component for various dataset
  12   types specified in the QPMDA spec. It covers Implementation defined ((ImplDef),
  13   Basic Counts (BC), Tenure Counts (TC), Continuous Multi-Bit (CMB), and Discrete
  14   Single Bit (DSB). It performs data collection in the data producing clock
  15   domain and transfers it to the data collection time domain, generally ATB
  16   clock domain.
  17
  18   The primary use case of the TPDM is to collect data from different data
  19   sources and send it to a TPDA for packetization, timestamping, and funneling.
  20
  21 maintainers:
  22   - Mao Jinlong <quic_jinlmao@quicinc.com>
  23   - Tao Zhang <quic_taozha@quicinc.com>
  24
  25 # Need a custom select here or 'arm,primecell' will match on lots of nodes
  26 select:
  27   properties:
  28     compatible:
  29       contains:
  30         enum:
  31           - qcom,coresight-tpdm
  32   required:
  33     - compatible
  34
  35 properties:
  36   $nodename:
  37     pattern: "^tpdm(@[0-9a-f]+)$"
  38   compatible:
  39     items:
  40       - const: qcom,coresight-tpdm
  41       - const: arm,primecell
  42
  43   reg:
  44     minItems: 1
  45     maxItems: 2
  46
  47   qcom,dsb-element-size:
  48     description:
  49       Specifies the DSB(Discrete Single Bit) element size supported by
  50       the monitor. The associated aggregator will read this size before it
  51       is enabled. DSB element size currently only supports 32-bit and 64-bit.
  52     $ref: /schemas/types.yaml#/definitions/uint8
  53     enum: [32, 64]
  54
  55   qcom,dsb-msrs-num:
  56     description:
  57       Specifies the number of DSB(Discrete Single Bit) MSR(mux select register)
  58       registers supported by the monitor. If this property is not configured
  59       or set to 0, it means this DSB TPDM doesn't support MSR.
  60     $ref: /schemas/types.yaml#/definitions/uint32
  61     minimum: 0
  62     maximum: 32
  63
  64   clocks:
  65     maxItems: 1
  66
  67   clock-names:
  68     items:
  69       - const: apb_pclk
  70
  71   out-ports:
  72     description: |
  73       Output connections from the TPDM to coresight funnel/TPDA.
  74     $ref: /schemas/graph.yaml#/properties/ports
  75
  76     properties:
  77       port:
  78         description: Output connection from the TPDM to coresight
  79             funnel/TPDA.
  80         $ref: /schemas/graph.yaml#/properties/port
  81
  82 required:
  83   - compatible
  84   - reg
  85   - clocks
  86   - clock-names
  87
  88 additionalProperties: false
  89
  90 examples:
  91   # minimum TPDM definition. TPDM connect to coresight TPDA.
  92   - |
  93     tpdm@684c000 {
  94       compatible = "qcom,coresight-tpdm", "arm,primecell";
  95       reg = <0x0684c000 0x1000>;
  96
  97       qcom,dsb-element-size = /bits/ 8 <32>;
  98       qcom,dsb-msrs-num = <16>;
  99
 100       clocks = <&aoss_qmp>;
 101       clock-names = "apb_pclk";
 102
 103       out-ports {
 104         port {
 105           tpdm_prng_out_tpda_qdss: endpoint {
 106             remote-endpoint =
 107               <&tpda_qdss_in_tpdm_prng>;
 108           };
 109         };
 110       };
 111     };
 112
 113 ...