Re: a question about lid input device

[Zhang Rui <rui.zhang@intel.com>]

On Mon, 2010-07-05 at 09:28 +0800, Dmitry Torokhov wrote:
> On Jul 4, 2010, at 6:09 PM, Zhang Rui <rui.zhang@intel.com> wrote:
> 
> > On Sun, 2010-07-04 at 16:35 +0800, Dmitry Torokhov wrote:
> >> On Mon, Jun 21, 2010 at 09:56:37PM -0400, Len Brown wrote:
> >>> Dmitry,
> >>> Is there a reason not to simply add a "state" attribute
> >>> to a LID input device?
> >>>
> >>
> >> Len,
> >>
> >> There is no LED input device, there is an input device that happens  
> >> to
> >> report EV_SW/SW_LID state. If we did that we'd need to add attributes
> >> for all types of switches, keys, current values of REL and ABS axis,
> >> min/max/fuzz/flat settings of ABS axis and so forth that input device
> >> might report. I do not think it is a good idea.
> >>
> > I agree.
> > How about adding a field in uevent file that reports the switch  
> > status?
> >
> 
> 
> I think if you can listen to uevents you can just as easily open /dev/ 
> input/eventX and listen to proper input events.
> 
the question is users may want to get the lid switch STATUS,
asynchronously.

thank,
rui