linux-kernel - Re: [PATCH v2 3/8] dt-bindings: rtc: isl12022: add bindings for battery alarm trip levels

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Message-ID: <605616cd-d0f9-a430-7cf2-b2f36d07ffe3@linaro.org>
Date:   Tue, 13 Jun 2023 23:37:15 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-rtc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/8] dt-bindings: rtc: isl12022: add bindings for
 battery alarm trip levels

On 13/06/2023 21:51, Rasmus Villemoes wrote:
>>> diff --git a/Documentation/devicetree/bindings/rtc/intersil,isl12022.yaml b/Documentation/devicetree/bindings/rtc/intersil,isl12022.yaml
>>> index 7c1e638d657a..d5d3a687a34d 100644
>>> --- a/Documentation/devicetree/bindings/rtc/intersil,isl12022.yaml
>>> +++ b/Documentation/devicetree/bindings/rtc/intersil,isl12022.yaml
>>> @@ -22,6 +22,18 @@ properties:
>>>    interrupts:
>>>      maxItems: 1
>>>  
>>> +  isil,trip-level85-microvolt:
>>
>> Why encoding level85 in the property name? Your commit msg (datasheet)
>> suggests this is quite flexible, so why it cannot be just list of two
>> trip levels - for first and second interrupt?
> 
> Yeah, so I did consider just making it a two-element array
> isil,trip-levels-microvolt. But then I didn't know how to express the
> enum constraint, i.e. that the first must be one of the 2125000, ...,
> 4675000 values and the second one of the 1875000, ..., 4125000 ones. Is
> that possible, without providing a list of 49 possible pairs? Or is it
> sufficient to just write this out in prose?

items:
  - enum: [ a, b, c ]
  - enum: [ f, d, e ]


Best regards,
Krzysztof