linux-kernel - Re: [PATCH v2 2/4] dt-bindings: net: Add support for Sophgo SG2044 dwmac

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Message-ID: <gcur4pgotkwp6nd557ftkvlzh5xv3shxvvl3ofictlie2hlxua@f4zxljrgzvke>
Date: Mon, 28 Oct 2024 15:16:54 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
	Inochi Amaoto <inochiama@...il.com>
Cc: Chen Wang <unicorn_wang@...look.com>, 
	Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Inochi Amaoto <inochiama@...look.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Jose Abreu <joabreu@...opsys.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, 
	Richard Cochran <richardcochran@...il.com>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Giuseppe Cavallaro <peppe.cavallaro@...com>, Yixun Lan <dlan@...too.org>, Longbin Li <looong.bin@...il.com>, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, 
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 2/4] dt-bindings: net: Add support for Sophgo SG2044
 dwmac

On Mon, Oct 28, 2024 at 08:06:25AM +0100, Krzysztof Kozlowski wrote:
> On 28/10/2024 00:32, Inochi Amaoto wrote:
> > On Sun, Oct 27, 2024 at 09:38:00PM +0100, Krzysztof Kozlowski wrote:
> >> On Fri, Oct 25, 2024 at 09:09:58AM +0800, Inochi Amaoto wrote:
> >>> The GMAC IP on SG2044 is almost a standard Synopsys DesignWare MAC
> >>> with some extra clock.
> >>>
> >>> Add necessary compatible string for this device.
> >>>
> >>> Signed-off-by: Inochi Amaoto <inochiama@...il.com>
> >>> ---
> >>
> >> This should be squashed with a corrected previous patch 
> > 
> > Good, I will.
> > 
> >> (why do you need to select snps,dwmac-5.30a?), 
> > 
> > The is because the driver use the fallback versioned compatible 
> > string to set up some common arguments. (This is what the patch
> 
> Nope. Driver never relies on schema doing select. That's just incorrect.
> 

Yeah, I make a mistake on understanding you. For me, I just followed
what others do. But there is a comment before this select.

"""
Select every compatible, including the deprecated ones. This way, we
will be able to report a warning when we have that compatible, since
we will validate the node thanks to the select, but won't report it
as a valid value in the compatible property description
"""

By reading this, I think there may be some historical reason? Maybe
someone can explain this.

Regards,
Inochi