linux-kernel - Re: [PATCH 4/5] dt-bindings: remoteproc: qcom,glink-rpm-edge: convert to DT schema

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Message-ID: <20230207184230.GA3950598-robh@kernel.org>
Date:   Tue, 7 Feb 2023 12:42:30 -0600
From:   Rob Herring <robh@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] dt-bindings: remoteproc: qcom,glink-rpm-edge:
 convert to DT schema

On Tue, Feb 07, 2023 at 10:08:51AM +0100, Krzysztof Kozlowski wrote:
> Convert Qualcomm G-Link RPM edge binding to DT schema.  Move it to
> remoteproc as it better suits the purpose - communication channel with
> remote processor.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  .../remoteproc/qcom,glink-rpm-edge.yaml       | 92 ++++++++++++++++++
>  .../bindings/soc/qcom/qcom,glink.txt          | 94 -------------------
>  2 files changed, 92 insertions(+), 94 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,glink-rpm-edge.yaml
>  delete mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,glink-rpm-edge.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,glink-rpm-edge.yaml
> new file mode 100644
> index 000000000000..07cd67ec97c1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,glink-rpm-edge.yaml
> @@ -0,0 +1,92 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/qcom,glink-rpm-edge.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm G-Link RPM edge
> +
> +description: |
> +  Qualcomm G-Link edge, a FIFO based mechanism for communication with Resource
> +  Power Manager (RPM) on various Qualcomm platforms.
> +
> +maintainers:
> +  - Bjorn Andersson <andersson@...nel.org>
> +
> +properties:
> +  compatible:
> +    const: qcom,glink-rpm
> +
> +  label:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    description:
> +      Name of the edge, used for debugging and identification purposes. The
> +      node name will be used if this is not present.
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  mboxes:
> +    items:
> +      - description: rpm_hlos mailbox in APCS
> +
> +  qcom,remote-pid:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      The identifier for the remote processor as known by the rest of the
> +      system.
> +
> +  qcom,rpm-msg-ram:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: |
> +      RPM message memory resource (compatible:: qcom,rpm-msg-ram).

'::' is not a thing in YAML.

> +
> +  rpm-requests:
> +    type: object
> +    $ref: /schemas/soc/qcom/qcom,smd-rpm.yaml#
> +    unevaluatedProperties: false
> +    description:
> +      Qualcomm Resource Power Manager (RPM) over G-Link
> +
> +    properties:
> +      qcom,intents:
> +        $ref: /schemas/types.yaml#/definitions/uint32-array
> +        description:
> +          List of (size, amount) pairs describing what intents should be

pairs? Sounds like a matrix then.

> +          preallocated for this virtual channel. This can be used to tweak the
> +          default intents available for the channel to meet expectations of the
> +          remote.
> +
> +    required:
> +      - qcom,glink-channels
> +
> +required:
> +  - compatible
> +  - interrupts
> +  - mboxes
> +
> +anyOf:
> +  - required:
> +      - qcom,remote-pid
> +  - required:
> +      - qcom,rpm-msg-ram
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    rpm-glink {
> +        compatible = "qcom,glink-rpm";
> +        interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
> +        mboxes = <&apcs_glb 0>;
> +        qcom,rpm-msg-ram = <&rpm_msg_ram>;
> +
> +        rpm-requests {
> +            compatible = "qcom,rpm-msm8996";
> +            qcom,glink-channels = "rpm_requests";
> +
> +            /* ... */
> +        };
> +    };