I am using i.mx6quad with debian jessie (3.14.60-fslc-imx6-sr).
I want co connect ov5642 camera module with PARALLEL 8BIT interface (using 8gpios for data and 3 for control signals).
I wrote a linux kernel module to service interrupts from control signals. Interrupts from VSYNC and HREF signals are serviced properly but when I connect a PCLK (about 8MHz) signal which is much faster than HREF or VSYNC my linux hangs up untill I disconnect a wire with PCLK (everything stucks). To connect PCLK I use GPIO90 (DISP1_DATA22) but I tried also with other gpios.
Now My question is which GPIO should I use to service such fast signals like PCLK properly or what can i do to avoid linux hang ups ??