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Altera_Forum's avatar
Altera_Forum
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9 years ago

Unable to access fpga regs from arm

Hi, i Compiled my own Linux Kernel using the Tutorial from the eekwiki ( https://eewiki.net/display/linuxonarm/de0-nano-soc+kit ). However when I try to access the fpga space i get a bus error....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

The first question is whether or not you included the FPGA bridge modules/drivers in your kernel. There are quite a few Altera drivers hidden in different places in the kernel make config process that can be turned on. Other then that, I can't think of what might be going on. This really just sounds like a missing driver.

Did you pull from the main-line kernel or from Altera's linux-socfpga git repository?