linux-kernel - Re: [PATCH v2 05/11] dt-bindings: mfd: qcom-pm8xxx: document qcom,pm8921 as fallback of qcom,pm8018

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Date:   Tue, 4 Oct 2022 10:55:18 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Neil Armstrong <neil.armstrong@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Satya Priya <quic_c_skakit@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Lee Jones <lee@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Alessandro Zummo <a.zummo@...ertech.it>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-input@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-rtc@...r.kernel.org
Subject: Re: [PATCH v2 05/11] dt-bindings: mfd: qcom-pm8xxx: document
 qcom,pm8921 as fallback of qcom,pm8018

On 04/10/2022 10:08, Neil Armstrong wrote:
> The PM8018 is used as compatible with PM8921 on the MDM9615, document this situation,
> and an example section to validate this change.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> 
> diff --git a/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml b/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml
> index 61bd0b3ce02f..24d71918ff8a 100644
> --- a/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml
> +++ b/Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml
> @@ -15,11 +15,15 @@ description: |
>  
>  properties:
>    compatible:
> -    enum:
> -      - qcom,pm8018
> -      - qcom,pm8058
> -      - qcom,pm8821
> -      - qcom,pm8921
> +    oneOf:
> +      - enum:
> +          - qcom,pm8058
> +          - qcom,pm8821
> +          - qcom,pm8921
> +      - items:
> +          - enum:
> +              - qcom,pm8018
> +          - const: qcom,pm8921
>  
>    reg:
>      maxItems: 1
> @@ -52,4 +56,35 @@ required:
>    - interrupt-controller
>  
>  additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    ssbi {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +      pmic@0 {
> +        compatible = "qcom,pm8921";
> +        reg = <0>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        interrupt-controller;
> +        #interrupt-cells = <2>;
> +
> +        interrupt-parent = <&tlmm>;
> +        interrupts = <32 IRQ_TYPE_EDGE_RISING>;
> +      };
> +
> +      pmic@1 {
> +        compatible = "qcom,pm8018", "qcom,pm8921";
> +        reg = <1>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        interrupt-controller;
> +        #interrupt-cells = <2>;
> +
> +        interrupt-parent = <&tlmm>;
> +        interrupts = <33 IRQ_TYPE_EDGE_RISING>;
> +      };

These two pmics are exactly the same (except compatible), so just keep
one example... unless both are coming from the same, real DTS?

Best regards,
Krzysztof