linux-kernel - Re: [PATCH net-next v2] net: dsa: mt7530: fix support for MT7531BE

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Date:   Thu, 20 Apr 2023 01:22:20 +0100
From:   Daniel Golle <daniel@...rotopia.org>
To:     netdev@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        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>,
        Russell King <linux@...linux.org.uk>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Arınç ÜNAL <arinc.unal@...nc9.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: Re: [PATCH net-next v2] net: dsa: mt7530: fix support for MT7531BE

On Sun, Apr 16, 2023 at 01:08:14PM +0100, Daniel Golle wrote:
> There are two variants of the MT7531 switch IC which got different
> features (and pins) regarding port 5:
>  * MT7531AE: SGMII/1000Base-X/2500Base-X SerDes PCS
>  * MT7531BE: RGMII
> 
> Moving the creation of the SerDes PCS from mt753x_setup to mt7530_probe
> with commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation
> to mt7530_probe function") works fine for MT7531AE which got two
> instances of mtk-pcs-lynxi, however, MT7531BE requires mt7531_pll_setup
> to setup clocks before the single PCS on port 6 (usually used as CPU
> port) starts to work and hence the PCS creation failed on MT7531BE.
> 
> Fix this by introducing a pointer to mt7531_create_sgmii function in
> struct mt7530_priv and call it again at the end of mt753x_setup like it
> was before commit 6de285229773 ("net: dsa: mt7530: move SGMII PCS
> creation to mt7530_probe function").
> 
> Fixes: 6de285229773 ("net: dsa: mt7530: move SGMII PCS creation to mt7530_probe function")
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> ---

This v2 submission addresses the comments made by Jesse Brandeburg
regarding zero-initializing regmap_config as we are now not necessarily
using both of them. Comments by Arınç ÜNAL have also been discussed
and resulting in receiving Ack.

However, I can see in patchwork that the patch has been set to
"Changes Requested".

Can someone please tell me which further changes are needed?
I don't see any other comments on the mailing list or patchwork.

Thank you!


Daniel