linux-kernel - Re: [PATCH 2/5] dt-bindings: mfd: atmel,at91-usart: convert to json-schema

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Date:   Thu, 1 Sep 2022 11:31:03 +0000
From:   <Eugen.Hristev@...rochip.com>
To:     <krzysztof.kozlowski@...aro.org>, <Sergiu.Moga@...rochip.com>,
        <lee@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <Claudiu.Beznea@...rochip.com>,
        <radu_nicolae.pirea@....ro>, <richard.genoud@...il.com>,
        <mturquette@...libre.com>, <sboyd@...nel.org>,
        <gregkh@...uxfoundation.org>, <jirislaby@...nel.org>,
        <admin@...iphile.com>, <Kavyasree.Kotagiri@...rochip.com>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <linux-serial@...r.kernel.org>
Subject: Re: [PATCH 2/5] dt-bindings: mfd: atmel,at91-usart: convert to
 json-schema

On 8/19/22 12:05 PM, Krzysztof Kozlowski wrote:
> On 19/08/2022 11:47, Krzysztof Kozlowski wrote:
>> On 19/08/2022 11:38, Sergiu.Moga@...rochip.com wrote:
>>> On 18.08.2022 11:39, Krzysztof Kozlowski wrote:
>>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>>
>>>> On 17/08/2022 10:55, Sergiu Moga wrote:
>>>>> Convert at91 USART DT Binding for Atmel/Microchip SoCs to
>>>>> json-schema format.
>>>>>
>>>>> Signed-off-by: Sergiu Moga <sergiu.moga@...rochip.com>
>>>>> ---
>>>>>    .../bindings/mfd/atmel,at91-usart.yaml        | 190 ++++++++++++++++++
>>>>>    .../devicetree/bindings/mfd/atmel-usart.txt   |  98 ---------
>>>>>    2 files changed, 190 insertions(+), 98 deletions(-)
>>>>>    create mode 100644 Documentation/devicetree/bindings/mfd/atmel,at91-usart.yaml
>>>>>    delete mode 100644 Documentation/devicetree/bindings/mfd/atmel-usart.txt
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/mfd/atmel,at91-usart.yaml b/Documentation/devicetree/bindings/mfd/atmel,at91-usart.yaml
>>>>> new file mode 100644
>>>>> index 000000000000..cf15d73fa1e8
>>>>> --- /dev/null
>>>>> +++ b/Documentation/devicetree/bindings/mfd/atmel,at91-usart.yaml
>>>> One more thing - I think this should be in serial directory, not mfd,
>>>> even though it includes SPI. MFD is just a Linux naming/wrapper device.
>>>>
>>>> Best regards,
>>>> Krzysztof
>>>
>>> I would rather keep it in this directory, since its corresponding driver
>>> is also in the mfd directory.
>>
>> Sorry, but that's poor argument. Driver subsystems match Linux
>> convention, not necessarily hardware type/naming. Bindings directories
>> match hardware. MFD bindings are only for MFD wrapper drivers and this
>> is a serial interface. Not a MFD. You even do not add MFD devices in the
>> driver but add *always one* device depending on serial feature you want.
>> This is not even MFD device but regular platform device with children.
>>
>> You put it in SoC, though, because all other SoCs store it there...
> 
> The last one should be:
> 
> You could put it in SoC, though, because all other SoCs store it there...

Hi,

If it this is only a conversion to yaml, why do you want it moved to 
another dir ?
Perhaps if you consider SoC or serial as a better place, it should be 
done through a different patch.

Also, disputing whether this is really a MFD or not, is not in the scope 
of this patch.

Eugen

> 
> Best regards,
> Krzysztof
> 
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