linux-kernel - Re: [PATCH v4 1/2] dt-bindings: power: reset: qcom-pon: update "reg" property details

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Message-ID: <a47a33a5-aec7-2a52-f1e8-52c45307862e@linaro.org>
Date:   Tue, 26 Jul 2022 12:25:02 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Anjelique Melendez <quic_amelende@...cinc.com>, corbet@....net,
        sre@...nel.org, robh+dt@...nel.org, agross@...nel.org,
        bjorn.andersson@...aro.org
Cc:     krzysztof.kozlowski+dt@...aro.org, vkoul@...nel.org,
        linux-doc@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        David Collins <quic_collinsd@...cinc.com>
Subject: Re: [PATCH v4 1/2] dt-bindings: power: reset: qcom-pon: update "reg"
 property details

On 25/07/2022 21:13, Anjelique Melendez wrote:
> From: David Collins <quic_collinsd@...cinc.com>
> 
> Update the description of "reg" property to add the PON_PBS base
> address along with PON_HLOS base address.  Also add "reg-names"
> property constraints.
> 
> Signed-off-by: David Collins <quic_collinsd@...cinc.com>
> Signed-off-by: Anjelique Melendez <quic_amelende@...cinc.com>
> ---
>  Documentation/devicetree/bindings/power/reset/qcom,pon.yaml | 50 +++++++++++++++++++++++++++---
>  1 file changed, 46 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> index 353f155d..d7b6b875 100644
> --- a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> @@ -15,18 +15,27 @@ description: |
>  
>    This DT node has pwrkey and resin as sub nodes.
>  
> -allOf:
> -  - $ref: reboot-mode.yaml#
> -
>  properties:
>    compatible:
>      enum:
>        - qcom,pm8916-pon
>        - qcom,pms405-pon
>        - qcom,pm8998-pon
> +      - qcom,pmk8350-pon
>  
>    reg:
> -    maxItems: 1
> +    description: |
> +      Specifies the SPMI base address for the PON (power-on) peripheral.  For
> +      PMICs that have the PON peripheral (GEN3) split into PON_HLOS and PON_PBS
> +      (e.g. PMK8350), this can hold addresses of both PON_HLOS and PON_PBS
> +      peripherals.  In that case, the PON_PBS address needs to be specified to
> +      facilitate software debouncing on some PMIC.
> +    minItems: 1
> +    maxItems: 2
> +
> +  reg-names:
> +    minItems: 1
> +    maxItems: 2
>  
>    pwrkey:
>      type: object
> @@ -42,6 +51,39 @@ required:
>  
>  unevaluatedProperties: false
>  
> +allOf:
> +  - $ref: reboot-mode.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,pm8916-pon
> +              - qcom,pms405-pon
> +              - qcom,pm8998-pon
> +    then:
> +      properties:
> +        reg:
> +          maxItems: 1
> +        reg-names:
> +          items:
> +            - const: pon

All your previous patches were actually missing (in commit msg, in the
code) that piece of information which you add here. You now add
reg-names with "pon" for older devices. I assumed previous that it is
somehow needed, so I gave you the hints how it should be coded. But I
don't understand - why are you doing it?

This should be explained in commit msg. To me it is not needed at all...
unless you want to mark that first address space is entirely different
for other devices?

> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: qcom,pmk8350-pon
> +    then:
> +      properties:
> +        reg:
> +          minItems: 1
> +          maxItems: 2
> +        reg-names:
> +          minItems: 1
> +          items:
> +            - const: hlos
> +            - const: pbs
> +
>  examples:
>    - |
>     #include <dt-bindings/interrupt-controller/irq.h>


Best regards,
Krzysztof