I have a problem using an GPIO interface in my self compilied linux. I followed all steps of Session 11 of Mohammadsadegh Sadri (https://www.youtube.com/user/mamsadegh2/videos), and the related entries in the Xilinx Wiki (http://www.wiki.xilinx.com/). I managed to compile Linux, u-boot and all nessesarie stuff. I have BOOT.ini on my SD-Card which contains the FSBL, the bitstream file and the uboot. The system boots fine and uboot loads the ramdisk, uImage and deviceTree file using FTFP from my workstation. The system boots fine and I can access the linux using the UART interface.
The hardware design I'm using contains the Zynq core and two additional GPIO ports, one connected to the 8 LED's on the board and the other connected to the push buttons.
In Linux I see 3 different GPIO devices under /sys/classes/gpio/. When I follow the istructions in the Wiki about GPIO the export of the GPIO devices works properly. But when I try to set the GPIO direction of the GPIO device to "out" the system crashes without any error message.
How could I trace the Problem? Any tips of solving the issus?