linux-kernel - Re: [PATCH 1/2] dt-bindings: arm: Document qcom,cpss-acc

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Date:   Mon, 17 May 2021 20:13:50 -0500
From:   Rob Herring <robh@...nel.org>
To:     Bartosz Dudziak <bartosz.dudziak@...jp.pl>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        David Sterba <dsterba@...e.com>, Jens Axboe <axboe@...nel.dk>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] dt-bindings: arm: Document qcom,cpss-acc

On Thu, May 13, 2021 at 05:34:41PM +0200, Bartosz Dudziak wrote:
> The CPSS ACC binding describes the clock, reset, and power domain
> controller for a Cortex-A7 CPU.
> 
> Signed-off-by: Bartosz Dudziak <bartosz.dudziak@...jp.pl>
> ---
>  .../devicetree/bindings/arm/cpus.yaml         |  7 ++--
>  .../bindings/arm/msm/qcom,cpss-acc.yaml       | 41 +++++++++++++++++++
>  2 files changed, 45 insertions(+), 3 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,cpss-acc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml
> index 26b886b20b..f391e15184 100644
> --- a/Documentation/devicetree/bindings/arm/cpus.yaml
> +++ b/Documentation/devicetree/bindings/arm/cpus.yaml
> @@ -204,6 +204,7 @@ properties:
>            - marvell,mmp3-smp
>            - mediatek,mt6589-smp
>            - mediatek,mt81xx-tz-smp
> +          - qcom,cpss-acc

This should not be the same as the compatible below.

>            - qcom,gcc-msm8660
>            - qcom,kpss-acc-v1
>            - qcom,kpss-acc-v2
> @@ -276,7 +277,7 @@ properties:
>        Specifies the SAW* node associated with this CPU.
>  
>        Required for systems that have an "enable-method" property
> -      value of "qcom,kpss-acc-v1" or "qcom,kpss-acc-v2"
> +      value of "qcom,kpss-acc-v1", "qcom,kpss-acc-v2" or "qcom,cpss-acc"
>  
>        * arm/msm/qcom,saw2.txt
>  
> @@ -286,9 +287,9 @@ properties:
>        Specifies the ACC* node associated with this CPU.
>  
>        Required for systems that have an "enable-method" property
> -      value of "qcom,kpss-acc-v1" or "qcom,kpss-acc-v2"
> +      value of "qcom,kpss-acc-v1", "qcom,kpss-acc-v2" or "qcom,cpss-acc"
>  
> -      * arm/msm/qcom,kpss-acc.txt
> +      * arm/msm/qcom,kpss-acc.txt or arm/msm/qcom,cpss-acc.yaml
>  
>    rockchip,pmu:
>      $ref: '/schemas/types.yaml#/definitions/phandle'
> diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,cpss-acc.yaml b/Documentation/devicetree/bindings/arm/msm/qcom,cpss-acc.yaml
> new file mode 100644
> index 0000000000..54efbc5e3d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/msm/qcom,cpss-acc.yaml
> @@ -0,0 +1,41 @@
> +# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/msm/qcom,cpss-acc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cortex-A7 Processor Sub-system (CPSS) Application Clock Controller (ACC)
> +
> +maintainers:
> +  - Kumar Gala <galak@...eaurora.org>

Not an active email nor is Kumar maintaining QCom stuff any more.

> +
> +description: |
> +  The CPSS ACC provides clock, power domain, and reset control to a Cortex-A7
> +  processor. There is one ACC register region per CPU within the PSS remapped
> +  region as well as an alias register region that remaps accesses to the ACC
> +  associated with the CPU accessing the region.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,cpss-acc

This needs to be SoC specific.

> +
> +  reg:
> +    minItems: 1
> +    maxItems: 2
> +    items:
> +      - description: ACC base register region
> +      - description: optional ACC alias register region
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    clock-controller@...88000 {
> +      compatible = "qcom,cpss-acc";
> +      reg = <0xf9088000 0x1000>, <0xf9008000 0x1000>;
> +    };
> -- 
> 2.25.1
>