Xilininx GPIO
Peter Scott
peter.scott at ericsson.com
Tue Oct 21 06:42:41 EST 2008
Hello there,
I am having difficulties with some xilinx gpios and the xilinx-2.6-xlnx
kernel. As far as I can tell the kernel is configured correctly for
gpio.
I can see that the module_init function "xgpio_init" is called, and that
bus_add_driver and driver_add_groups returns without error. But I cannot
see that the probe function is called. /proc/misc doesnt list a driver
for the gpios. I am not sure where to go next as there is no error
printouts.
I have seen other peoples consoles stating that the gpio is mapped to xx
but this doesn't happen for me.
I am using the default bit file for the ml507 board, and have created
device files
/dev/xgpio0
/dev/xgpio1 etc with major 10 and minor 185
However if I try to open these devices the open fails.
I would rally appreciate it if someone could give me some pointers as to
what to look for, or how a to go about debugging this.
Many thanks
Peter Scott
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