linux-kernel - Re: [PATCH 2/3] dt-bindings: mfd: atmel,flexcom: Add new compatible string for lan966x

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Date:   Tue, 7 Jun 2022 09:56:00 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Kavyasree.Kotagiri@...rochip.com
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        Nicolas.Ferre@...rochip.com, alexandre.belloni@...tlin.com,
        Claudiu.Beznea@...rochip.com, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH 2/3] dt-bindings: mfd: atmel,flexcom: Add new compatible
 string for lan966x

On 07/06/2022 09:54, Kavyasree.Kotagiri@...rochip.com wrote:
>>>>> LAN966x SoC flexcoms has two optional I/O lines. Namely, CS0 and CS1
>> in
>>>>> flexcom SPI mode. CTS and RTS in flexcom USART mode. These pins
>>>>> can be mapped to lan966x FLEXCOM_SHARED[0-20] pins and usage
>>>> depends on
>>>>> functions being configured.
>>>>>
>>>>> Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@...rochip.com>
>>>>> ---
>>>>>  .../bindings/mfd/atmel,flexcom.yaml           | 21 ++++++++++++++++++-
>>>>>  1 file changed, 20 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
>>>> b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
>>>>> index 221bd840b49e..6050482ad8ef 100644
>>>>> --- a/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
>>>>> +++ b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
>>>>> @@ -16,7 +16,9 @@ description:
>>>>>
>>>>>  properties:
>>>>>    compatible:
>>>>> -    const: atmel,sama5d2-flexcom
>>>>> +    enum:
>>>>> +      - atmel,sama5d2-flexcom
>>>>> +      - microchip,lan966x-flexcom
>>>>
>>>> Your new v1 is here worse than old v2, where this was just simple
>>>> extension of existing enum. Why did you change it?
>>>>
>>> I introduced new compatible string for lan966x and also I have new DT
>> properties
>>> "microchip,flx-shrd-pins" and "microchip,flx-cs-names".
>>
>> v1 also had the new compatible, hadn't it? The difference is in the enum
>> - before you did not modify this line. Less code in the diff...
>>
> Yes, previous patch series also had new compatible which introduced new mux DT properties in atmel-flexcom.yaml and mux driver.
> As part of review comments from Peter Rosin on driver part, Mux implementation is dropped. Please ignore previous patch series. Now, flexcom chip-select support is done in atme-flexcom.c driver. So, I started new patch series now which introduced new DT properties "microchip,flx-shrd-pins" and "microchip,flx-cs-names" and driver changes only in atmel-flexcom.c driver.

We talk only about the hunk here, not about other properties.

Best regards,
Krzysztof