[PATCH v8 03/10] dt-bindings: arm: Adds CoreSight TPDM hardware definitions

[Jinlong Mao]

Thank you Rob for the review of the yaml changes.

I will check and address all you comments.

On 6/9/2022 6:01 AM, Rob Herring wrote:
> On Wed, Jun 08, 2022 at 11:46:58PM +0800, Mao Jinlong wrote:
>> Adds new coresight-tpdm.yaml file describing the bindings required
>> to define tpdm in the device trees.
>>
>> Acked-by: Suzuki K Poulose <suzuki.poulose at arm.com>
>> Reviewed-by: Mike Leach <mike.leach at linaro.org>
>> Signed-off-by: Tao Zhang <quic_taozha at quicinc.com>
>> Signed-off-by: Mao Jinlong <quic_jinlmao at quicinc.com>
>> ---
>>   .../bindings/arm/coresight-tpdm.yaml          | 99 +++++++++++++++++++
> qcom,coresight-tpdm.yaml
>
>>   .../devicetree/bindings/arm/coresight.txt     |  7 ++
> This file is going away[1]. I'd just drop the changes to it.
>
>>   MAINTAINERS                                   |  1 +
>>   3 files changed, 107 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/arm/coresight-tpdm.yaml b/Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
>> new file mode 100644
>> index 000000000000..14bef4ce4274
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
>> @@ -0,0 +1,99 @@
>> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
>> +# Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/arm/coresight-tpdm.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Trace, Profiling and Diagnostics Monitor - TPDM
>> +
>> +description: |
>> +  The TPDM or Monitor serves as data collection component for various dataset
>> +  types specified in the QPMDA spec. It covers Implementation defined ((ImplDef),
>> +  Basic Counts (BC), Tenure Counts (TC), Continuous Multi-Bit (CMB), and Discrete
>> +  Single Bit (DSB). It performs data collection in the data producing clock
>> +  domain and transfers it to the data collection time domain, generally ATB
>> +  clock domain.
>> +
>> +  The primary use case of the TPDM is to collect data from different data
>> +  sources and send it to a TPDA for packetization, timestamping, and funneling.
>> +
>> +maintainers:
>> +  - Mao Jinlong <quic_jinlmao at quicinc.com>
>> +  - Tao Zhang <quic_taozha at quicinc.com>
>> +
>> +properties:
>> +  $nodename:
>> +    pattern: "^tpdm(@[0-9a-f]+)$"
> blank line
>
>> +  compatible:
>> +    items:
>> +      - const: qcom,coresight-tpdm
>> +      - const: arm,primecell
> You need a 'select' to fix the errors reported. See other primecell
> bindings.
>
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  clock-names:
>> +    items:
>> +      - const: apb_pclk
>> +
>> +  out-ports:
>> +    description: |
>> +      Output connections from the TPDM to coresight funnle/tpda.
> typo
>
>> +    $ref: /schemas/graph.yaml#/properties/ports
> blank line here.
>
>> +    properties:
>> +      port:
>> +        description: Output connection from the TPDM to coresight
>> +            funnel/tpda.
> s/tpda/TPDA/
>
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  # minimum TPDM definition. TPDM connect to coresight funnel.
>> +  - |
>> +    tpdm at 6980000 {
>> +      compatible = "qcom,coresight-tpdm", "arm,primecell";
>> +      reg = <0x6980000 0x1000>;
>> +
>> +      clocks = <&aoss_qmp>;
>> +      clock-names = "apb_pclk";
>> +
>> +      out-ports {
>> +        port {
>> +          tpdm_turing_out_funnel_turing: endpoint {
>> +            remote-endpoint =
>> +              <&funnel_turing_in_tpdm_turing>;
>> +          };
>> +        };
>> +      };
>> +    };
>> +  # minimum TPDM definition. TPDM connect to coresight TPDA.
>> +  - |
> The only difference in the 2 examples is some external phandle. 1
> example is sufficient.
>
>> +    tpdm at 684c000 {
>> +      compatible = "qcom,coresight-tpdm", "arm,primecell";
>> +      reg = <0x684c000 0x1000>;
>> +
>> +      clocks = <&aoss_qmp>;
>> +      clock-names = "apb_pclk";
>> +
>> +      out-ports {
>> +        port {
>> +          tpdm_prng_out_tpda_qdss: endpoint {
>> +            remote-endpoint =
>> +              <&tpda_qdss_in_tpdm_prng>;
>> +          };
>> +        };
>> +      };
>> +    };
>> +
>> +...
> Rob
>
> [1] https://lore.kernel.org/all/20220603011933.3277315-1-robh@kernel.org/