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

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Message-ID: <628b7411-7d12-4915-80c8-cabb74ac6590@sirena.org.uk>
Date:   Fri, 2 Jun 2023 13:22:36 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Matthias Schiffer <matthias.schiffer@...tq-group.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.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 02, 2023 at 01:52:00PM +0200, Matthias Schiffer wrote:
> We have seen a number of downstream patches that allow enabling the
> realtime feature of the SPI subsystem to reduce latency. These were
> usually implemented for a specific SPI driver, even though the actual
> handling of the rt flag is happening in the generic SPI controller code.
> 
> Introduce a generic linux,use-rt-queue flag that can be used with any
> controller driver. The now redundant driver-specific pl022,rt flag is
> marked as deprecated.

This is clearly OS specific tuning so out of scope for DT...

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