linux-kernel - Re: [PATCH 2/3] dt-bindings: trivial-devices: add asair,ags02ma

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Message-ID: <77e1d308-6ac3-4200-b72a-6d5717869b06@linaro.org>
Date:   Wed, 8 Nov 2023 13:01:39 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Anshul Dalal <anshulusr@...il.com>, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Shuah Khan <skhan@...uxfoundation.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH 2/3] dt-bindings: trivial-devices: add asair,ags02ma

On 08/11/2023 12:54, Anshul Dalal wrote:
> 
> Hello Krzysztof,
> 
> On 11/7/23 23:17, Krzysztof Kozlowski wrote:
>> On 07/11/2023 18:30, Anshul Dalal wrote:
>>> Add bindings for Asair AGS02MA TVOC sensor to trivial devices.
>>>
>>> The sensor communicates over i2c with the default address 0x1a.
>>> TVOC values can be read in the units of ppb and ug/m^3 at register 0x00.
>>>
>>> Datasheet:
>>>   https://asairsensors.com/wp-content/uploads/2021/09/AGS02MA.pdf
>>> Product-Page:
>>>   http://www.aosong.com/m/en/products-33.html
>>>
>>> Signed-off-by: Anshul Dalal <anshulusr@...il.com>
>>> ---
>>>  Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
>>> index cd58179ae337..9cd67b758a88 100644
>>> --- a/Documentation/devicetree/bindings/trivial-devices.yaml
>>> +++ b/Documentation/devicetree/bindings/trivial-devices.yaml
>>> @@ -47,6 +47,8 @@ properties:
>>>            - adi,lt7182s
>>>              # AMS iAQ-Core VOC Sensor
>>>            - ams,iaq-core
>>> +            # TVOC (Total Volatile Organic Compounds) i2c sensor
>>> +          - asair,ags02ma
>>
>> I think you miss VDD supply.
> 
> I am sorry but I'm not sure what you meant. Are you referring to the
> addition of some information in the commit description?

I meant that your device might not be trivial. Your device takes VDD
supply, which is now not described in the bindings. Do you want to say
that VDD supply in all possible designs is hard-wired to
non-controllable regulator supply?

Best regards,
Krzysztof