netdev - Re: [PATCH net-next 1/5] arm64: dts: ls1043a-qds: switch to new fixed-link binding

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Message-ID: <d2012185-0403-4bad-ad4a-e0468e11928d@gmail.com>
Date: Sat, 30 Aug 2025 23:39:58 +0200
From: Heiner Kallweit <hkallweit1@...il.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Shawn Guo <shawnguo@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Patrice Chotard <patrice.chotard@...s.st.com>,
 Andrew Lunn <andrew@...n.ch>, Andrew Lunn <andrew+netdev@...n.ch>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Eric Dumazet <edumazet@...gle.com>, David Miller <davem@...emloft.net>,
 "linux-arm-kernel@...ts.infradead.org"
 <linux-arm-kernel@...ts.infradead.org>,
 "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 1/5] arm64: dts: ls1043a-qds: switch to new
 fixed-link binding

On 8/30/2025 11:27 PM, Russell King (Oracle) wrote:
> On Sat, Aug 30, 2025 at 12:27:23PM +0200, Heiner Kallweit wrote:
>> The old array-type fixed-link binding has been deprecated
>> for more than 10 yrs. Switch to the new binding.
> 
> ... and the fact we have device trees that use it today means that we
> can't remove support for it from the kernel.
> 
After this series there is no in-tree user of the old binding any longer.
So why shouldn't we remove support for the old binding?
Do you think of out-of-tree users, or of new dts files using the
old binding?

> I think it would make sense to update the dts files, and add a noisy
> warning when we detect that it's being used to prevent future usage.
> 

The old binding is marked deprecated in the schema, not sure whether
this results in any warning.

  fixed-link:
    oneOf:
      - $ref: /schemas/types.yaml#/definitions/uint32-array
        deprecated: true