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

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Date:   Mon, 6 Mar 2023 16:18:51 +0300
From:   Arınç ÜNAL <arinc.unal@...nc9.com>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
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>,
        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 4.03.2023 16:04, Russell King (Oracle) wrote:
> 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.

Thanks for the heads up Russell.

Arınç