From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: linux-input@vger.kernel.org
Subject: Re: [PATCH RFC] Add support for the matrix keyboard used in Bachmann's OT200
Date: Wed, 12 Dec 2012 11:02:55 -0800 [thread overview]
Message-ID: <20121212190255.GB10583@core.coreip.homeip.net> (raw)
In-Reply-To: <1355319341-26597-1-git-send-email-christian.gmeiner@gmail.com>
Hi Christian,
On Wed, Dec 12, 2012 at 02:35:41PM +0100, Christian Gmeiner wrote:
> The used matrix keyboard controler (implemented via FPGA) supports
> two simultaneous key presses. The driver sends the raw register
> values for each key (row & column) to userspace.
>
> In userspace a small tool is running, which reads a 'mapping'
> file, processes the key events and send the configured keycodes
> back to the kernel via uinput.
This is a bit roundabout way of doing it. Why can't the kernel driver
perform lookup in it's internal table and emit proper keycodes itself?
We have wealth of options for supplying keymaps to the kernel drivers,
including:
- platform data
- device tree data
- loading from userspace via EVIOCSKEYCODE ioctl.
Thanks.
--
Dmitry
next prev parent reply other threads:[~2012-12-12 19:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 13:35 [PATCH RFC] Add support for the matrix keyboard used in Bachmann's OT200 Christian Gmeiner
2012-12-12 19:02 ` Dmitry Torokhov [this message]
2012-12-13 8:17 ` Christian Gmeiner
2012-12-16 13:33 ` Christian Gmeiner
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