linux-kernel - Re: [PATCH v4 2/3] dt-bindings: i2c-ast2600: Add support for AST2600 i2C driver

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Date:   Wed, 15 Feb 2023 21:17:56 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ryan Chen <ryan_chen@...eedtech.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 2/3] dt-bindings: i2c-ast2600: Add support for AST2600
 i2C driver

On 15/02/2023 06:43, Ryan Chen wrote:
>>> +  - $ref: /schemas/i2c/i2c-controller.yaml#
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - aspeed,ast2600-i2c
>>
>> NAK. It's already there. Please do not waste our time in submitting duplicated
>> drivers.
> 
> It is not duplicated, as my description in cover " This series add AST2600 i2c new register set driver"
> So, this will be different driver compatible. 
> The original compatible is 
>       - aspeed,ast2400-i2c-bus
>       - aspeed,ast2500-i2c-bus
>       - aspeed,ast2600-i2c-bus
> So the new register set compatible is "- aspeed,ast2600-i2c", remove "bus".

Bindings are documenting hardware, so I claim - we already have this
hardware described and this is duplicated. Otherwise - what are these
two I2C controllers and what are the differences? Why they do not have
really different name? Bus looks more like a mistake than a
differentiating name.

Best regards,
Krzysztof