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

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Message-ID: <a62fb259-3ad3-b75e-c59e-2ce937bf799a@linux.microsoft.com>
Date:   Wed, 15 Feb 2023 20:17:00 -0800
From:   Dhananjay Phadke <dphadke@...ux.microsoft.com>
To:     Ryan Chen <ryan_chen@...eedtech.com>,
        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

Hi Ryan,

On 2/14/2023 9:43 PM, Ryan Chen wrote:
> 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".

Is it possible to keep existing driver drivers/i2c/busses/i2c-aspeed.c
for ast2400/ast2500, while move ast2600 support to new driver
altogether, say i2c-ast2600.c along with new register mode? By default
new driver can support legacy mode with same compatible "aspeed,ast2600-
i2c-bus", additionally driven by dt props, switch to new mode.

Regards,
Dhananjay