lkml.org 
[lkml]   [2010]   [Jan]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRE: [RFC] Staging:IIO: New ABI
Date
From


>From: Dmitry Torokhov [mailto:dmitry.torokhov@gmail.com]
>
>On Fri, Jan 22, 2010 at 04:31:12PM -0800, Greg KH wrote:
>> On Fri, Jan 22, 2010 at 04:14:15PM -0800, Dmitry Torokhov wrote:
>> > On Fri, Jan 22, 2010 at 12:47:18PM -0800, Greg KH wrote:
>> > > On Wed, Jan 20, 2010 at 04:53:21PM +0000, Jonathan Cameron wrote:
>> > > > I am not aware of these. Could you direct me to the current api? Also note that these
>> > > > aren't the actual alarms, merely a means of enabling the relevant event on the related
>> > > > event character device.
>> > >
>> > > Hm, I thought we had an accelerator interface somewhere...
>> > >
>> >
>> > Nope. And I am also interested in this since I am sittign on a bunch of
>> > accelerometers, magnetometers, etc drivers that are trying to plug into
>> > input sysbsystem and quite unsure what to do with them.
>> >
>> > It was OK whch HDAPS and friends when they were using input for
>> > secondary, toyish purposes, but these new drivers trying to use input
>> > devnts as primary API and I am unsure if it is the best solution.
>> > Accelerometer might be used as an input device but not always an input
>> > device.
>>
>> Yeah, I see it using a joystick interface, which might be acceptable for
>> "toy" devices like you say.
>>
>> But for "real" ones, we should do something else.
>>
>> Maybe, for devices that are going to be used by x.org, like the "toy"
>> ones, we stick with the current input interface, but for others, we use
>> a "real" interface, probably through hwmon, so that users can get the
>> real data out in a consistant manner.
>>
>
>I'd rather have all of them use real interface and then have a bridge
>to input module to enable toyish mode (unless the device in question
>is really truly an input device).
>
>--
>Dmitry

I really don't see that hwmon provides facilities like input/evdev does.
Queuing of events with time stamping and multiple reader support.
The adxl34x accelerometer driver for example is really intended to be a input device.
Send EV_KEY for x,y,z_TAP detections, send EV_KEY for 3D orientation sensing, and EV_ABS for acceleration.
With very minor platform data customization you can use this device for game controls or GUI interaction.
A few examples include digital picture frames, ebook readers, etc.

-Michael

------------------------------------------------------------------
********* Analog Devices GmbH Open Platform Solutions
** *****
** ** Wilhelm-Wagenfeld-Strasse 6
** ***** D-80807 Munich
********* Germany
Registergericht München HRB 40368, Geschäftsführer: Thomas Wessel, William A. Martin, Margaret K. Seif





--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2010-01-26 10:57    [W:0.062 / U:6.700 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site