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. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
