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

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Date:   Thu, 16 Feb 2023 09:26:37 +0000
From:   Ryan Chen <ryan_chen@...eedtech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        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

Hello Krzysztof

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Thursday, February 16, 2023 5:22 PM
> 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; linux-arm-kernel@...ts.infradead.org;
> linux-aspeed@...ts.ozlabs.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v4 2/3] dt-bindings: i2c-ast2600: Add support for AST2600
> i2C driver
> 
> On 16/02/2023 10:20, Ryan Chen wrote:
> > Hello Krzysztof
> >
> >> -----Original Message-----
> >> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> >> Sent: Thursday, February 16, 2023 4:18 AM
> >> 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;
> >> linux-arm-kernel@...ts.infradead.org;
> >> linux-aspeed@...ts.ozlabs.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.
> > For misunderstanding, or mistaken.
> > I purpose to be aspeed,ast2600-i2cv2, will it more clear way ?
> 
> I don't know. I still did not get answers. I asked here several questions.
Those are different i2c controller, as I description in cover letter.
The i2c new register mode, there have two separate slave/master register.
And different register with old register.
So now, avoid misunderstanding, or mistaken.
I purpose to be aspeed,ast2600-i2cv2.

Best regards,
Ryan Chen