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

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Date:   Thu, 8 Sep 2022 16:55:37 +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 19/08/2022 22:26, Anjelique Melendez wrote:
> 
> Hi Krzysztof,
> First I would like to apologize for my lack of response to this patch series
> over these past few weeks. I have been out of office.
> 
> On 7/26/2022 3:25 AM, Krzysztof Kozlowski wrote:
>> 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?
> Adding reg-names "pon" for older devices is simply to provide clarification
> about what the register relates to. Similar to reg-names "hlos" and "pbs"
> for gen3 children devices, reg-names is completely optional and is not
> consumed by any driver.

OK, can be. Include it in the commit msg, please.


Best regards,
Krzysztof