Matthew Garrett wrote:
On Tue, Mar 13, 2007 at 10:14:19PM -0500, Bret Hughes wrote:
I am evaluating a motion computing LE1600 tablet for possible use with
linux using Centos 4.4 since that is what we use for several servers and
had the installation media handy. This device uses a TouchKO serial
touchscreen that has been used by linux in the past but the issue I am
facing is that the bios does not expose the serial ports. I spoke with
an engineer at TouchKO familiar with the LE1600 project an he told me I
would have to access the serial port via acpi. Hmm says I, I guess I
have some reading to do. DO after a day or so of trying to get up to
speed, I feel I can ask a fairly decent question or two.
It sounds like it ought to be exposed via ACPIPNP. If you do cat
/sys/bus/pnp/devices/*/id, do any of them look plausibly linked to the
tablet device? If so, add the id to drivers/serial/8250_pnp.c, build it,
see if that binds and gives you a serial port and if so send a patch.
Thanks for the help.
nothing there:
[root@localhost serial]# ls -a /sys/bus/pnp/devices/
. ..
nothing loaded in drivers either:
[root@localhost serial]# ls -Ra /sys/bus/pnp/drivers/
/sys/bus/pnp/drivers/:
. .. ide parport_pc serial system
/sys/bus/pnp/drivers/ide:
. ..
/sys/bus/pnp/drivers/parport_pc:
. ..
/sys/bus/pnp/drivers/serial:
. ..
/sys/bus/pnp/drivers/system:
. ..
Is there a module I should load before this works? perhaps a kernel
recompile with some additional modules are needed?
Now that I am back at the office and looking at the kernel .config via
make xconfig I see that 8250/16550 device discovery via ACPI namespace
(SERIAL_8250_ACPI) is not enabled. Is is safe to assume that it should
be (go ahead and groan, I probably would) anything else that should be
included?
I am going to enable it and start a compile. I guess we will see what
kind of horsepower this little dude has.
Thanks again,
Bret
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