Re: How to use omap keypad driver function

[lamikr <lamikr@cc.jyu.fi>]

Devendra Kumar Madhesia wrote:
>
>
> Hi,
> Thanks for giving such useful idea.
>
> But I have also some doubt.
> The omap keypad driver is based on interrupt.
> Will this idea also useful for  omap keypad driver?
>
> Plz find source code for omap keypad driver from:
> /usr/src/armlinux/linux-2.6.16/drivers/input/keyboard/omap-keypad.c
>
> Best Regards,
> Devendra
>   
Yes, that driver receives creates /dev/input/event(number) to userspace.
(by calling input_allocate_device() method)
and starts listening irq's from the key presses. When it receives irq,
it checks which key was really pressed and uses
input_report_key() method for passing that information to userspace via
/dev/input/event(number) interface.

Note that in this level, you can desire which key events you send to
userspace. In my device I have for example an joypad
that sends always couple of irq's to driver and sending them directly to
userspace would mess apps like gpe-window manager.
(For me the press to right would generate "up-right" and "bottom-right"
events, and instead of passing them, I only send one event
indicating that "right" key were pressed.)

I have not send that driver to omap list because I am not sure would the
omap-keypad driver be the best location for that code.

Mika