linux-kernel - Re: [RFC PATCH v1 3/4] dt-bindings: interrupt-controller: realtek,rtl-intc: replace irq mapping

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Date:   Thu, 23 Dec 2021 18:00:36 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Sander Vanheule <sander@...nheule.net>
Cc:     Thomas Gleixner <tglx@...utronix.de>, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Birger Koblitz <mail@...ger-koblitz.de>,
        Bert Vermeulen <bert@...t.com>,
        John Crispin <john@...ozen.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v1 3/4] dt-bindings: interrupt-controller: realtek,rtl-intc: replace irq mapping

On Thu, 23 Dec 2021 12:08:33 +0000,
Sander Vanheule <sander@...nheule.net> wrote:
> 
> The binding incorrectly specified the "interrupt-map" property should be
> used, although the use is non-standard. A quirk had to be introduced in
> commit de4adddcbcc2 ("of/irq: Add a quirk for controllers with their own
> definition of interrupt-map") to allow the driver to function again.

That's too late. We have released a kernel with this binding, and it
will live on forever until we totally remove the platform from the
tree.

DT is an ABI, and only time travel can fix this blunder.

	M.

-- 
Without deviation from the norm, progress is not possible.