linux-kernel - Re: [PATCH v5 0/2] Add ASPEED AST2600 I2Cv2 controller driver

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Date:   Mon, 20 Feb 2023 11:35:30 +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 v5 0/2] Add ASPEED AST2600 I2Cv2 controller driver

On 20/02/2023 10:56, Ryan Chen wrote:
>>
>>> And also have separate i2c master and slave register set for control.
>>
>> Since several of my questions remained unanswered and quite frankly it's
>> fruitless... so let me read the commit msg directly - it's the same device, just
>> with different register layout. Having new compatible makes sense, but this
>> should be part of old binding.
>>
> Sorry, I am confused, Do you mean I should base on original Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml
> Add new compatible? Not add another aspeed,i2cv2.yaml.

Yes. New compatible and new syscon phandle (constrained to specific
compatibles in allOf:if:then:) to the old binding.

Best regards,
Krzysztof