linux-kernel - Re: [PATCH 1/2] spi: dt-bindings: introduce linux,use-rt-queue flag

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Message-ID: <c46e93a3-3af0-4e83-b8b0-0100b3392422@sirena.org.uk>
Date:   Fri, 9 Jun 2023 10:34:18 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Alexander Stein <alexander.stein@...tq-group.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        linux-arm-kernel@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux@...tq-group.com
Subject: Re: [PATCH 1/2] spi: dt-bindings: introduce linux,use-rt-queue flag

On Fri, Jun 09, 2023 at 11:13:39AM +0200, Alexander Stein wrote:
> Am Freitag, 9. Juni 2023, 10:42:04 CEST schrieb Linus Walleij:

> > I don't think command line arguments are necessarily global by
> > nature, AFAIK it's fine to invent something like pl022.4.rt_sched=1
> > where 4 is the instance number. Parsing it is just code.

> Now we are touching the topic of non-deterministic device names/numbers. This 
> gets worse if your SPI controller is attached to some other device, although 
> RT capabilities are rather limited in that case anyway.

I would use the address rather than the device number, and you could use
the compatible if you're worried about a stable name for the name part.

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