netdev - Re: [RFC PATCH net] net: dsa: mt7530: move PLL setup out of port 6 pad configuration

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Message-ID: <ZANBwZryFXDEVEtG@shell.armlinux.org.uk>
Date:   Sat, 4 Mar 2023 13:04:01 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     arinc9.unal@...il.com
Cc:     Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Arınç ÜNAL <arinc.unal@...nc9.com>,
        René van Dorst <opensource@...rst.com>,
        Alexander Couzens <lynxis@...0.eu>,
        Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>,
        Richard van Schagen <richard@...terhints.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        erkin.bozoglu@...ont.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [RFC PATCH net] net: dsa: mt7530: move PLL setup out of port 6
 pad configuration

On Sat, Mar 04, 2023 at 03:54:54PM +0300, arinc9.unal@...il.com wrote:
> From: Arınç ÜNAL <arinc.unal@...nc9.com>
> 
> Move the PLL setup of the MT7530 switch out of the pad configuration of
> port 6 to mt7530_setup, after reset.
> 
> This fixes the improper initialisation of the switch when only port 5 is
> used as a CPU port.
> 
> Add supported phy modes of port 5 on the PLL setup.
> 
> Remove now incorrect comment regarding P5 as GMAC5.

If this is what is necessary, you're taking some of the configuration
out of phylink's control, effectively making port 6 a fixed-interface
mode port. In that case, there should only ever be one interface
mode set in port 6's supported_interface mask, so that phylink knows
that no other interface modes can be selected for that port.

-- 
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