linux-kernel - Re: [PATCH RFC v2 1/8] spi: dt-bindings: spi-peripheral-props: add spi-offloads property

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Message-ID: <f67fadb2-03de-4f82-ae32-5e1c64fac027@sirena.org.uk>
Date: Fri, 31 May 2024 13:47:45 +0100
From: Mark Brown <broonie@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: Conor Dooley <conor@...nel.org>,
	Nuno Sá <noname.nuno@...il.com>,
	Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Nuno Sá <nuno.sa@...log.com>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	David Jander <david@...tonic.nl>,
	Martin Sperl <kernel@...tin.sperl.org>, linux-spi@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org
Subject: Re: [PATCH RFC v2 1/8] spi: dt-bindings: spi-peripheral-props: add
 spi-offloads property

On Thu, May 30, 2024 at 04:28:38PM -0500, David Lechner wrote:

> I think one of my colleagues was working on one in the last year that we
> might still have lying around. But I don't know what we could use as the
> SPI controller that would have offload support. 

David was using a Raspberry Pi, their DMA controller can happily write
to the SPI controller registers so functions as an offload engine - I'd
not be surprised if other SPI controllers and DMA controllers could
interact in a similar fashion for the CAN or interrupt controller style
use cases.

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