linux-kernel - Re: [PATCH 2/2] dt-bindings: iio: adc: nxp,imx93-adc.yaml: Add calibration properties

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Date: Wed, 20 Mar 2024 13:15:51 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Andrej Picej <andrej.picej@...ik.com>, haibo.chen@....com,
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org
Cc: jic23@...nel.org, lars@...afoo.de, shawnguo@...nel.org,
 s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, robh@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 upstream@...ts.phytec.de
Subject: Re: [PATCH 2/2] dt-bindings: iio: adc: nxp,imx93-adc.yaml: Add
 calibration properties

On 20/03/2024 13:05, Andrej Picej wrote:
> Hi Krzysztof,
> 
> On 20. 03. 24 11:26, Krzysztof Kozlowski wrote:
>> On 20/03/2024 11:04, Andrej Picej wrote:
>>> Document calibration properties and how to set them.
>>
>> Bindings are before users.
> 
> will change patch order when I send a v2.
> 
>>
>> Please use subject prefixes matching the subsystem. You can get them for
>> example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
>> your patch is touching.
>> There is no file extension in prefixes.
> 
> So: dt-bindings: iio/adc: nxp,imx93-adc: Add calibration properties?

Did you run the command I proposed? I don't see much of "/", but except
that looks good.

> 
>>
>>>
>>> Signed-off-by: Andrej Picej <andrej.picej@...ik.com>
>>> ---
>>>   .../bindings/iio/adc/nxp,imx93-adc.yaml           | 15 +++++++++++++++
>>>   1 file changed, 15 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/iio/adc/nxp,imx93-adc.yaml b/Documentation/devicetree/bindings/iio/adc/nxp,imx93-adc.yaml
>>> index dacc526dc695..64958be62a6a 100644
>>> --- a/Documentation/devicetree/bindings/iio/adc/nxp,imx93-adc.yaml
>>> +++ b/Documentation/devicetree/bindings/iio/adc/nxp,imx93-adc.yaml
>>> @@ -46,6 +46,21 @@ properties:
>>>     "#io-channel-cells":
>>>       const: 1
>>>   
>>> +  nxp,calib-avg-en:
>>> +    description:
>>> +      Enable or disable averaging of calibration time.
>>> +    enum: [ 0, 1 ]
>>> +
>>> +  nxp,calib-nr-samples:
>>> +    description:
>>> +      Selects the number of averaging samples to be used during calibration.
>>> +    enum: [ 16, 32, 128, 512 ]
>>> +
>>> +  nxp,calib-t-samples:
>>> +    description:
>>> +      Specifies the sample time of calibration conversions.
>>> +    enum: [ 8, 16, 22, 32 ]
>>
>> No, use existing, generic properties. Open other bindings for this.
> 
> You mean I should use generic properties for the ADC calibration 
> settings? Is there already something in place? Because as I understand 
> it, these calib-* values only effect the calibration process of the ADC.

Please take a look at other devices and dtschema. We already have some
properties for this... but maybe they cannot be used?


Best regards,
Krzysztof