netdev - Re: [net-next PATCH RFC v3 1/8] dt-bindings: net: document ethernet PHY package nodes

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Message-ID: <a6a155ab-0852-4f08-b49b-952ac74124a8@lunn.ch>
Date: Sun, 7 Jan 2024 19:44:36 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Sergey Ryazanov <ryazanov.s.a@...il.com>,
	Robert Marko <robert.marko@...tura.hr>,
	Vladimir Oltean <olteanv@...il.com>,
	Rob Herring <robh+dt@...nel.org>, Luo Jie <quic_luoj@...cinc.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Andy Gross <agross@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	netdev@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [net-next PATCH RFC v3 1/8] dt-bindings: net: document ethernet
 PHY package nodes

> Honestly I would postpone untile we have a clear idea of what is
> actually part of the PHY and what can be handled externally... Example
> setting the clock in gcc, writing a specific driver...

That is really core of the problem here. We have no reliable
description of the hardware. The datasheet often starts with a block
diagram of the PHY package. Sometimes there is a product brief with
the same diagram. We need that published. I'm not asking for the full
data sheet, just the introductory text which gives a high level
overview of what the hardware actually is. Then we can sketch out a
high level Linux architecture for the PHY package.

     Andrew