linux-kernel - [RFC PATCH net-next 0/12] net: dsa: mt7530: fix port 5 phylink, phy muxing, and port 6

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Date:   Wed,  5 Apr 2023 23:38:47 +0300
From:   arinc9.unal@...il.com
To:     René van Dorst <opensource@...rst.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Daniel Golle <daniel@...rotopia.org>,
        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>,
        Russell King <linux@...linux.org.uk>
Cc:     Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>,
        Richard van Schagen <richard@...terhints.com>,
        Richard van Schagen <vschagen@...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: [RFC PATCH net-next 0/12] net: dsa: mt7530: fix port 5 phylink, phy muxing, and port 6

Hello!

This patch series is mainly focused on improving the support for port 5,
setting up port 6, and refactoring the MT7530 DSA subdriver.

The only missing piece to properly support port 5 as a CPU port is the
fixes [0] [1] [2] from Richard.

I have very thoroughly tested the patch series with every possible mode to
use. I'll let the name of the dtb files speak for themselves.

MT7621 Unielec:

only-gmac0-mt7621-unielec-u7621-06-16m.dtb
rgmii-only-gmac0-mt7621-unielec-u7621-06-16m.dtb
only-gmac1-mt7621-unielec-u7621-06-16m.dtb
gmac0-and-gmac1-mt7621-unielec-u7621-06-16m.dtb
phy0-muxing-mt7621-unielec-u7621-06-16m.dtb
phy4-muxing-mt7621-unielec-u7621-06-16m.dtb
port5-as-user-mt7621-unielec-u7621-06-16m.dtb

tftpboot 0x80008000 mips-uzImage.bin; tftpboot 0x83000000 mips-rootfs.cpio.uboot; tftpboot 0x83f00000 $dtb; bootm 0x80008000 0x83000000 0x83f00000

MT7623 Bananapi:

only-gmac0-mt7623n-bananapi-bpi-r2.dtb
rgmii-only-gmac0-mt7623n-bananapi-bpi-r2.dtb
only-gmac1-mt7623n-bananapi-bpi-r2.dtb
gmac0-and-gmac1-mt7623n-bananapi-bpi-r2.dtb
phy0-muxing-mt7623n-bananapi-bpi-r2.dtb
phy4-muxing-mt7623n-bananapi-bpi-r2.dtb
port5-as-user-mt7623n-bananapi-bpi-r2.dtb

tftpboot 0x80008000 arm-uImage; tftpboot 0x83000000 arm-rootfs.cpio.uboot; tftpboot 0x83f00000 $dtb; bootm 0x80008000 0x83000000 0x83f00000

Current CPU ports setup of MT7530:

mt7530_setup()
-> mt7530_setup_port5()

mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt7530_mac_config()
      -> mt7530_setup_port5()
-> mt753x_pad_setup()
   -> mt7530_pad_clk_setup() sets up port 6, rename to mt7530_setup_port6()

How it will be with the patch series:

mt7530_setup()
-> mt7530_setup_port5() runs if the port is not used as a CPU, DSA, or user port

mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt7530_mac_config()
      -> mt7530_setup_port5()
      -> mt7530_setup_port6()

CPU ports setup of MT7531 for reference:

mt7531_setup()
-> mt753x_cpu_port_enable()
   -> mt7531_cpu_port_config()
      -> mt7531_mac_config()
         -> mt7531_rgmii_setup()
         -> mt7531_sgmii_setup_mode_an()
         -> etc.

mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt7531_mac_config()
      -> mt7531_rgmii_setup()
      -> mt7531_sgmii_setup_mode_an()
      -> etc.

[0] https://lore.kernel.org/netdev/20230212213949.672443-1-richard@routerhints.com/
[1] https://lore.kernel.org/netdev/20230212215152.673221-1-richard@routerhints.com/
[2] https://lore.kernel.org/netdev/20230212214027.672501-1-richard@routerhints.com/

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