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Subject: Re: [PATCH net-next v5] net: dsa: microchip: enable the SGMII port of
 the KSZ9897S
From: patchwork-bot+netdevbpf@kernel.org
Message-Id: 
 <178900501187.1147948.14444954736072489989.git-patchwork-notify@kernel.org>
Date: Thu, 10 Sep 2026 01:50:11 +0000
References: <20260904-ksz9897-sgmii-port-v5-1-9bd4a0381aa8@vaisala.com>
In-Reply-To: <20260904-ksz9897-sgmii-port-v5-1-9bd4a0381aa8@vaisala.com>
To: Tapio Reijonen <tapio.reijonen@vaisala.com>
Cc: woojung.huh@microchip.com, UNGLinuxDriver@microchip.com, andrew@lunn.ch,
 olteanv@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
 pabeni@redhat.com, linux@armlinux.org.uk, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org, tristram.ha@microchip.com, nb@tipi-net.de,
 Jerry.Ray@microchip.com, Tristram.Ha@microchip.com

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 04 Sep 2026 06:03:00 +0000 you wrote:
> The KSZ9897 has an SGMII/1000BASE-X capable port 7, but its chip_info
> entry never set .sgmii_port. ksz_has_sgmii_port() is therefore false,
> ksz9477_pcs_create() is never called and ksz9477_phylink_mac_select_pcs()
> returns NULL for port 7, so a phy-mode = "sgmii" or "1000base-x" link on
> that port cannot come up.
> 
> Only the KSZ9897S has that port; the KSZ9897R has a second RGMII port
> instead. Both report chip ID 0x00989700, so the port cannot be enabled
> from the chip ID alone, and enabling it unconditionally breaks the
> KSZ9897R badly: ksz9477_setup() propagates the failure of
> xpcs_create_pcs_mdiodev() on a part without an XPCS, so the switch as a
> whole stops probing.
> 
> [...]

Here is the summary with links:
  - [net-next,v5] net: dsa: microchip: enable the SGMII port of the KSZ9897S
    https://git.kernel.org/netdev/net-next/c/3037c2f6a9de

You are awesome, thank you!
-- 
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