netdev - Re: [PATCH RFC net-next v2 11/12] net: dsa: Separate C22 and C45 MDIO bus transaction methods

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Message-ID: <20230116192848.bi7bs5e55pdlxffm@skbuf>
Date:   Mon, 16 Jan 2023 21:28:48 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Michael Walle <michael@...le.cc>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Wei Fang <wei.fang@....com>,
        Shenwei Wang <shenwei.wang@....com>,
        Clark Wang <xiaoning.wang@....com>,
        NXP Linux Team <linux-imx@....com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Luiz Angelo Daros de Luca <luizluca@...il.com>
Subject: Re: [PATCH RFC net-next v2 11/12] net: dsa: Separate C22 and C45
 MDIO bus transaction methods

On Mon, Jan 16, 2023 at 08:51:55AM +0100, Michael Walle wrote:
> Hi,
> 
> Am 2023-01-03 16:56, schrieb Vladimir Oltean:
> > > So Luiz patches may allow a C45 bus, but are there any drivers today
> > > actually using it?
> > 
> > I sent a private email to Luiz a few minutes ago asking him to confirm.
> 
> Any news here? Do we need the c45 methods?

No news it seems. I am going to default to assuming that no, a ds->slave_mii_bus
created by dsa_switch_setup() does not need C45 accessors.

This patch should be modified to only touch the mt7530 driver, and
adjust the commit message accordingly. I see no connection to what the
DSA core does.