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SubjectRe: [PATCH v8 03/10] dt-bindings: arm: Adds CoreSight TPDM hardware definitions
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@arm.com>
> Reviewed-by: Mike Leach <mike.leach@linaro.org>
> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
> Signed-off-by: Mao Jinlong <quic_jinlmao@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@quicinc.com>
> + - Tao Zhang <quic_taozha@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@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@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/

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