linux-kernel - Re: [PATCH v6 8/9] dt-bindings: cpufreq: qcom-hw: Add bindings for 8998

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Message-ID: <20210714213946.GA3568065@robh.at.kernel.org>
Date:   Wed, 14 Jul 2021 15:39:46 -0600
From:   Rob Herring <robh@...nel.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>
Cc:     bjorn.andersson@...aro.org, viresh.kumar@...aro.org,
        agross@...nel.org, rjw@...ysocki.net, devicetree@...r.kernel.org,
        amit.kucheria@...aro.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        konrad.dybcio@...ainline.org, marijn.suijten@...ainline.org,
        martin.botka@...ainline.org, jami.kettunen@...ainline.org,
        paul.bouchara@...ainline.org,
        ~postmarketos/upstreaming@...ts.sr.ht, jeffrey.l.hugo@...il.com
Subject: Re: [PATCH v6 8/9] dt-bindings: cpufreq: qcom-hw: Add bindings for
 8998

On Thu, Jul 01, 2021 at 12:57:29PM +0200, AngeloGioacchino Del Regno wrote:
> The OSM programming addition has been done under the
> qcom,cpufreq-hw-8998 compatible name: specify the requirement
> of two additional register spaces for this functionality.
> This implementation, with the same compatible, has been
> tested on MSM8998 and SDM630.

Certainly we should be using the new binding for any new SoCs.

> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
> ---
>  .../bindings/cpufreq/cpufreq-qcom-hw.yaml     | 67 ++++++++++++++-----
>  1 file changed, 52 insertions(+), 15 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> index bc81b6203e27..29b663321a0b 100644
> --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> @@ -18,6 +18,10 @@ description: |
>  properties:
>    compatible:
>      oneOf:
> +      - description: Non-secure v1 of CPUFREQ HW
> +        items:
> +          - const: qcom,cpufreq-hw-8998
> +
>        - description: v1 of CPUFREQ HW
>          items:
>            - const: qcom,cpufreq-hw
> @@ -28,21 +32,9 @@ properties:
>                - qcom,sm8250-cpufreq-epss
>            - const: qcom,cpufreq-epss
>  
> -  reg:
> -    minItems: 2
> -    maxItems: 3
> -    items:
> -      - description: Frequency domain 0 register region
> -      - description: Frequency domain 1 register region
> -      - description: Frequency domain 2 register region
> +  reg: {}
>  
> -  reg-names:
> -    minItems: 2
> -    maxItems: 3
> -    items:
> -      - const: freq-domain0
> -      - const: freq-domain1
> -      - const: freq-domain2
> +  reg-names: {}
>  
>    clocks:
>      items:
> @@ -57,10 +49,55 @@ properties:
>    '#freq-domain-cells':
>      const: 1
>  
> +if:
> +  properties:
> +    compatible:
> +      contains:
> +        const: qcom,cpufreq-hw-8998
> +then:
> +  properties:
> +    reg:
> +      minItems: 2
> +      maxItems: 6
> +      items:
> +        - description: Frequency domain 0 register region
> +        - description: Operating State Manager domain 0 register region
> +        - description: Frequency domain 1 register region
> +        - description: Operating State Manager domain 1 register region
> +        - description: PLL ACD domain 0 register region (if ACD programming required)
> +        - description: PLL ACD domain 1 register region (if ACD programming required)
> +
> +    reg-names:
> +      minItems: 2
> +      maxItems: 6
> +      items:
> +        - const: "osm-domain0"
> +        - const: "freq-domain0"
> +        - const: "osm-domain1"
> +        - const: "freq-domain1"
> +        - const: "osm-acd0"
> +        - const: "osm-acd1"

This is different enough and there's not much else to this bindings, so 
I think you should do a separate schema doc.

BTW, Don't need quotes here.

> +
> +else:
> +  properties:
> +    reg:
> +      minItems: 2
> +      maxItems: 3
> +      items:
> +        - description: Frequency domain 0 register region
> +        - description: Frequency domain 1 register region
> +        - description: Frequency domain 2 register region
> +    reg-names:
> +      minItems: 2
> +      maxItems: 3
> +      items:
> +        - const: "freq-domain0"
> +        - const: "freq-domain1"
> +        - const: "freq-domain2"
> +
>  required:
>    - compatible
>    - reg
> -  - reg-names
>    - clocks
>    - clock-names
>    - '#freq-domain-cells'
> -- 
> 2.32.0
> 
>