I have a need to be able to read and write the gpio data registers PDATC and PDATD from a user space program.
We have a userspace program that succesfully mmaps an offset in /dev/mem and reads/writes registers in a CPLD at 0xFF00_0000. The issue seems to be that when I mmap /dev/mem to 0xE000_0D50 to read the PDATC register, Linux-2.6.17.11 just locks up. Can anyone shed a little light on why this could be happening? Charles Krinke _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
