linux-kernel - Re: Aquantia PHY in OCSGMII mode?

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Message-ID: <9d578a13-0be6-45fe-80b1-0588d2dfa9cc@lunn.ch>
Date: Mon, 4 Aug 2025 16:53:57 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Alexander Wilhelm <alexander.wilhelm@...termo.com>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Aquantia PHY in OCSGMII mode?

> I don see any firmware problems. I have one of the latest builds, and from what
> I understand, the firmware consists of base image and additionally a
> provisioning table. But this table is a kind of pre-configuration. That means I
> can override the entire PHY configuration to my needs.

This pre-configuration is what i don't like about these PHYs. It means
you cannot assume any register has the value the datasheet says it
should have after a reset. The driver might work for you, but not for
others because your firmware has different pre-configurations to other
firmware. So in effect, the driver needs to write every single
register with a known value...

	Andrew