Re: [Uclinux-dist-devel] [PATCH] Input: ad7879: support auxiliary GPIOs via gpiolib

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On Thu, Jan 07, 2010 at 11:46:15AM -0500, Mike Frysinger wrote:
> On Thu, Jan 7, 2010 at 11:16, Robin Getz wrote:
> > On Thu 7 Jan 2010 02:31, Dmitry Torokhov pondered:
> >> On Thu, Jan 07, 2010 at 02:18:22AM -0500, Mike Frysinger wrote:
> >> > From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
> >> >
> >> > Drop the simple fancy sysfs hooks for the aux GPIOs and expose these via
> >> > the gpiolib interface so that other drivers can use them.
> >>
> >> Would not that mess up current users (if any) that may rely on the
> >> existing sysfs attributes?
> >
> > We have talked  to the existing users of this (that we know of), and they
> > agreed that doing things the "standard" way with gpiolib is the better way to
> > move forward on things.
> 
> there is a standard sysfs interface for accessing gpios already too
> which this change allows people to utilize

Using (and providing) standard interfaces are laudible goal, however
that does not mean we can screw existing users over. Now Robin sais that
you talked to users (at least some) and this being an embedded platform
taht might be OK but generally sysfs is userspace interface and thus are
not to be changed lightly, only extended.

-- 
Dmitry
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