linux-kernel - Re: [PATCH net-next 6/6 v2] net: dsa: microchip: Setup fiber ports for KSZ8463

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Message-ID: <1c688ae1-5625-4598-a162-302e38dbe50e@lunn.ch>
Date: Tue, 8 Jul 2025 16:22:28 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Tristram.Ha@...rochip.com
Cc: Woojung Huh <woojung.huh@...rochip.com>,
	Vladimir Oltean <olteanv@...il.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Marek Vasut <marex@...x.de>, UNGLinuxDriver@...rochip.com,
	devicetree@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 6/6 v2] net: dsa: microchip: Setup fiber ports
 for KSZ8463

On Mon, Jul 07, 2025 at 08:16:48PM -0700, Tristram.Ha@...rochip.com wrote:
> From: Tristram Ha <tristram.ha@...rochip.com>
> 
> The fiber ports in KSZ8463 cannot be detected internally, so it requires
> specifying that condition in the device tree.  Like the one used in
> Micrel PHY the port link can only be read and there is no write to the
> PHY.  The driver programs registers to operate fiber ports correctly.
> 
> The PTP function of the switch is also turned off as it may interfere the
> normal operation of the MAC.

Is this PTP problem anything to do with fibre?

It seems like this should be a patch of its own, unless it does have
something to do with fibre.

	Andrew