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

Geert Uytterhoeven
2015-05-03T10:02:33Z

On Sun, May 3, 2015 at 11:01 AM, Martin Sperl <kernel@martin.sperl.org> wrote:
>> On 30.04.2015, at 21:58, Mark Brown <broonie@kernel.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@linux-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