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

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Message-ID: <CAMuHMdVyU4nOXna-+ThyCjaugGqVknuCHVzzoE-NuN6q3m_grw@mail.gmail.com>
Date:	Sun, 3 May 2015 12:02:13 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Martin Sperl <kernel@...tin.sperl.org>
Cc:	Mark Brown <broonie@...nel.org>,
	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 Sun, May 3, 2015 at 11:01 AM, Martin Sperl <kernel@...tin.sperl.org> wrote:
>> On 30.04.2015, at 21:58, Mark Brown <broonie@...nel.org> wrote:
>> A big reason for that is that it's not in my inbox for me to review,
>> these messages I flagged as unhelpful aren't going to help with that if
>> only because I don't want to create the impression that such behaviour
>> achieves results.
>
> What about implementing it like this:
> echo -n “spi32761.4” > /sys/bus/spi/drivers/spidev/bind
>
> Would this be an acceptable solution?
>
> This is actually mentioned in Documentation/spi/spidev as a
> possible option for the future - quote:
>
>> (Sysfs also supports userspace driven binding/unbinding of drivers to
>> devices.  That mechanism might be supported here in the future.)
>
> Not sure why it does not work right now (but it works for “real”
> device-drivers), but I guess it has to do with compatibility checks.

IIRC, PCI drivers support adding more compatible entries through /sysfs.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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