RE: [PATCH] input: Add sysfs interface to on/off state of GPIO keysand switches

[Lighthart, EricX]

There's the already-existing solution I was looking for.
Thanks Mark.

Dmitry, et al, please withdraw the patch.

> -----Original Message-----
> From: Mark Brown [mailto:broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx]
> Sent: Thursday, November 11, 2010 6:16 AM
> To: Lighthart, EricX
> Cc: dmitry.torokhov@xxxxxxxxx; pb@xxxxxxxxxxxxx; ext-
> mika.1.westerberg@xxxxxxxxx; linux-input@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH] input: Add sysfs interface to on/off state of GPIO
> keys and switches
> 
> On Thu, Nov 11, 2010 at 06:03:35AM -0800, Lighthart, EricX wrote:
> > User space cannot learn the current state of a GPIO key or switch.
> > Input system reports only changes, not state.
> >
> > Add two sysfs attributes, one each for keys and switches, that
> > report lists of keys or switches currently "on."
> 
> There's EVIOCG* ioctl()s for this.  Something sysfs (or a widely
> distributed utility) would be very helpful but there is actually a
> facility to read the state.
> 
> >  drivers/input/keyboard/gpio_keys.c |   68
> ++++++++++++++++++++++++++++--------
> 
> If something is needed here it should be done as part of the input
> layer, not in a driver specific fashion - there's nothing specific to
> GPIO keys here.
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