fszczerba:

I added event debugging to the kernel build, and you can then find the event's
in dmesg, however you can see then that no device node is created.

Edit:
when I call udevtrigger it sets up an appropriate device node.
trying the mknod only left me with incorrect events.

ADTRIG input resistor doesn't need to be there for touchscreen to work. You can verify that the touchscreen works by running a prebuilt WinCE image available from the Logic website.

Hi,

I applied the patch posted here from caiaq.org and the SPI patch. After that,
the touchscreen driver worked just fine.

If I could get anything like xorg working I could tell if the events are useable.
Did anyone make xorg to work either with fbdev or v4l driver ?

Best Regards,
jdr

I was using the qtopia build from ltib. It works (sort of) with the mouse (you can't use the menus, the mouse move events seem to make it think you are tapping with the stylus).

I haven't had time to look at this much since my last post, so no useful updates on my end.

I see, we are trying to get the touch to support Qtopia.

I disabled Qtopia right away. so sorry.

but the touch screen works fine

udevtrigger was all I needed to create the valid event[N] device node

I wrote a simple driver here to parse the events, and I am now using that for directfb as well.
the directfb handler seems to lose some events, and with a relative coord system that was unacceptable.

See my post on the Xorg thread. There you will find the required code
in order to add calibration to the mxc_ts driver.

AFAIK the mxc_ts driver does only generate absolute coordinates events.
So there should not be any problem in regard to relative events being lost.
But you will need to modify the driver in order to calibrate it. The device
has a rather huge offset and scaling error which needs to be compensated.

See below an example. I used that program in order to determine the
max/min x and y coordinates. After passing those values to the modified
mxc_ts module it worked just fine for me, even under Xorg.

#include <stdio.h>
#include <sys/time.h>
#include <linux/input.h>


int main(int argc, char **argv)
{
int fd, n;
struct input_event event;
int x = 0, y = 0, pendown = 0;

fd = open("/dev/input/event0", 0);
do {
n = read(fd, &event, sizeof(event));
if (event.type == EV_ABS)
{
if (event.code == ABS_X)
{
x = event.value;
}
if (event.code == ABS_Y)
{
y = event.value;
}
if (event.code == ABS_PRESSURE)
{
pendown = event.value;
}
fprintf(stderr, "x=%d y=%d - %d\n", x, y, pendown);
}
} while (n>=0);

close(fd);
return 0;
}

Best Regards,
jdr