I am new to writing device drivers and I would like some guidance on
this matter.
I am trying to get a sensor working using Eclair.
On the kernel side I have set up the sensor to update its current
state as an input device. By using adb shell I have confirmed that my
sensor is functioning by using:
cat /dev/input/event2
Now my issue arises as I try to implement the HAL portion for the
sensor. Like KeyInputQueue and EventHub.cpp I am trying to open the
input event file and poll the input event. However if I perform an
ioctl on the opened input event file I constantly receive an ENOTTY
error.
Here is the portion of the code that is giving me issues:
char szName[80];
if(ioctl(fd, EVIOCGNAME(sizeof(szName) - 1), &szName) < 1) {
SFH7743_LOGD("Unable to find device name: %s",
strerror(errno));
szName[0] = '\0';
}
Funny thing is EventHub.cpp does the exact same operation to my device
as it scans the input directory and EventHub is able to successfully
retrieve the device's name.
I have been stuck on this for a while and any help would be wonderful.
Thanks!
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