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Date: Mon, 20 Jul 2026 16:33:58 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Tapio Reijonen <tapio.reijonen@vaisala.com>
Cc: Woojung Huh <woojung.huh@microchip.com>, UNGLinuxDriver@microchip.com,
 Andrew Lunn <andrew@lunn.ch>, Vladimir Oltean <olteanv@gmail.com>, "David
 S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Paolo
 Abeni <pabeni@redhat.com>, Russell King <linux@armlinux.org.uk>,
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next] net: dsa: microchip: enable SGMII port for
 KSZ9897
Message-ID: <20260720163358.27f30ba4@kernel.org>
In-Reply-To: <20260703-ksz9897-sgmii-port-v1-1-387e7632dd0b@vaisala.com>
References: <20260703-ksz9897-sgmii-port-v1-1-387e7632dd0b@vaisala.com>
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On Fri, 03 Jul 2026 06:37:28 +0000 Tapio Reijonen wrote:
> The KSZ9897 has an SGMII/1000BASE-X capable port 7, but its chip_info
> entry never set .sgmii_port. As a result ksz_has_sgmii_port() is false,
> ksz9477_pcs_create() is never called, and ksz9477_phylink_mac_select_pcs()
> returns NULL for port 7, so no PCS is ever instantiated and a
> phy-mode = "sgmii" or "1000base-x" link on that port cannot come up.

The netdev patch queue has overflown, if this patch is necessary you
will have to repost it.