netdev - Re: [RFC net-next 2/2] net: dsa: Add driver for Maxlinear GSW1XX switch

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Date:   Thu, 27 Oct 2022 08:35:17 +0200
From:   Camel Guo <camelg@...s.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
CC:     Camel Guo <Camel.Guo@...s.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Rob Herring <robh@...nel.org>, kernel <kernel@...s.com>
Subject: Re: [RFC net-next 2/2] net: dsa: Add driver for Maxlinear GSW1XX
 switch

On 10/25/22 16:56, Andrew Lunn wrote:
>> > +EXPORT_SYMBOL(gsw1xx_shutdown);
>> 
>> 1. EXPORT_SYMBOL_GPL
>> 2. Why do you do it in the first place? It's one driver, no need for
>> building two modules. Same applies to other places.
> 
> At some point, there is likely to be SPI and UART support. The
> communication with the chip and the core driver will then be in
> separate modules. But i agree this is not needed at the moment when it
> is all linked into one.

Do you suggest that currently we put the content of gsw1xx_core.c and 
gsw1xx_mdio.c into one file and split them later at the time when 
another management mode (e,g: spi) is added?

Actually I kinda hope this piece of code (gsw1xx_core.c) can be reused 
in lantiq_gswip in short future.

I tried to use the logic in lantiq_gswip directly on the gsw145 chip. 
Unfortunately it did not work. It seems that the GSWIP part changes a lot.

> 
>     Andrew