linux-kernel - Re: [linux-sunxi] [PATCH 2/3] spidev: Add DT binding example.

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Message-Id: <A1FB2CDB-6735-46B2-BB74-80F1B2033E23@martin.sperl.org>
Date:	Sun, 3 May 2015 23:00:40 +0200
From:	Martin Sperl <kernel@...tin.sperl.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	Michal Suchanek <hramrach@...il.com>,
	"Eric D." <eric.dillmann@...il.com>,
	linux-sunxi <linux-sunxi@...glegroups.com>,
	Jonathan Corbet <corbet@....net>,
	Hans de Goede <hdegoede@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-spi <linux-spi@...r.kernel.org>
Subject: Re: [linux-sunxi] [PATCH 2/3] spidev: Add DT binding example.


> On 03.05.2015, at 11:59, Mark Brown <broonie@...nel.org> wrote:
> Hrm, yes - that should work.  I'd ask Greg, that's not something the bus
> implements.

It is still slightly more “complicated” from a distribution perspective,
but if that is what makes it a “clean” solution, then that is the way to
go forward.

I will investigate the fine details, but I fear we may need some
“compatibility” magic similar to “new_id” in USB to make it work,
because it seems as if you can ONLY force a driver to bind if it
_is_ compatible...

See also here: https://lwn.net/Articles/143397/

But from what I can tell this functionality (mentioned in this article
by Greg) has not been moved into driver-core and bus, so we would need
to run our own version of it.--
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