On Wednesday, July 01, 2009 11:50 AM, Daniel Mack wrote:

On Wed, Jul 01, 2009 at 02:45:58PM -0400, H Hartley Sweeten wrote:

quoted

quoted

Hmm, and then report them all via the very same input device? Or
register one for each encoder? The latter could easily be done by
registering multiple platform_devices with different platform_data,
right?

I suppose each encoder could be registered individually.  Then each would
report as a unique input device.  This should work with the driver as it
is now.  Then drawback is if there are a number of encoders and a
userspace app is opening all of them and doing a EVIOCGRAB it makes the
app a bit messy.

I was thinking more or passing an array of encoders to the driver and then
having it report all of them as one input device.  That ends up being a
lot cleaner.

I'd be fine with such a change. Just curious: how many encoders do you
have on your board?

I haven't had a chance to figure out a way to pass the array of encoders yet.

But, to answer your question, I have a couple different control panels with
2, 3, or 4 rotary encoders on them.  To go beyond 4 I think I will need to
work out a patch that only requires 1 interrupt line for each encoder.  My
platform has 24 gpio's that can generate interrupts but I am using a number
of them for other purposes.

Regards,
Hartley