linux-kernel - Re: [PATCH v5 net-next 00/12] net: ethernet: ti: introduce new cpsw switchdev based driver

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Message-ID: <20191111170826.GT5610@atomide.com>
Date:   Mon, 11 Nov 2019 09:08:26 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Sekhar Nori <nsekhar@...com>, netdev@...r.kernel.org,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        "David S . Miller" <davem@...emloft.net>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        Jiri Pirko <jiri@...nulli.us>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        Murali Karicheri <m-karicheri2@...com>,
        Ivan Vecera <ivecera@...hat.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 net-next 00/12] net: ethernet: ti: introduce new cpsw
 switchdev based driver

* Grygorii Strashko <grygorii.strashko@...com> [191109 15:16]:
> Hi Tony,
> 
> On 24/10/2019 19:05, Tony Lindgren wrote:
> > Hi,
> > 
> > * Grygorii Strashko <grygorii.strashko@...com> [191024 10:10]:
> > > This the RFC v5 which introduces new CPSW switchdev based driver which is
> > > operating in dual-emac mode by default, thus working as 2 individual
> > > network interfaces. The Switch mode can be enabled by configuring devlink driver
> > > parameter "switch_mode" to 1/true:
> > > 	devlink dev param set platform/48484000.ethernet_switch \
> > > 	name switch_mode value 1 cmode runtime
> > 
> > Just wondering about the migration plan.. Is this a replacement
> > driver or used in addition to the old driver?
> > 
> 
> Sry, I've missed you mail.
> 
> As it's pretty big change the idea is to keep both drivers at least for sometime.
> Step 1: add new driver and enable it on one platform. Do announcement.
> Step 2: switch all one-port and dual mac drivers to the new driver
> Step 3: switch all other platform to cpsw switchdev and deprecate old driver.

OK sounds good to me. So for the dts changes, we keep the old binding
and just add a new module there?

Or do you also have to disable some parts of the old dts?

Regards,

Tony