gsl2681 is not working properly

[mauphuong]

Hello,
I am doing to add GSL2681 touch controller to raspberry pi. I already recomplied the kernel and added silead.ko module to system. The GSL2681 ID is 0xb4820000 and I am using the firmware: https://github.com/onitake/gsl-firmware/blob/master/firmware/linux/silead/gsl1680-b482-q8-d702.fw, but touch not working properly:

• Touch is A location but system reconigize B location.
  Anyone know how to fix and how to get firmware of GSL2681 IC?

thanks

[onitake]

Is this a complete package of touchscreen controller + touchscreen, or are you trying to build your own touchscreen interface?
If it's the latter, you can't use one of the existing firmware images. They contain device-specific calibration data and aren't compatible with other devices, even if the chip is the same.
You need to obtain the Silead calibration utility (I believe it's called "Silead Ctouch Configure Suite"). If you can't find it online somewhere, you need to contact Silead.

[mauphuong]

hi @onitake,
Thank for your quick reply. Actually, I have the device working on Android, and the touch controller working well. Now I want to reuse the screen with Raspberry PI. I dont have firmware image, so I get the exisiting image from your git. Do you know how to extract GSL controller from running Android?

thanks

[onitake]

Take a look at the readme, it should help: https://github.com/onitake/gsl-firmware#android-driver

[mauphuong]

Thank you, let me try but it seems to be impossible for my case