Confused about EIM device tree configuration

[saijanani.tx]

Hello @rjjong1 ,

The Bus error usually occurs when you are trying to access a reserved memory. Could you maybe re-check your permissions?

As far as the discussion of EIM, there is another thread in the community that has been talking in detail about this:

Accessing External Memory Bus (EIM) on iMX6 via memory map

I am trying to communicate with an FPGA connected to External Memory Bus (EIM) on iMX6. On T30 I used the Toradex Beta DMA driver which presents the external memory bus as a character device. I could read from a given address using ssize_t pread(int fd, void *buf, size_t count, off_t offset); with fd being the file descriptor of the character device node and offset the relative address of the memory region exposed by the FPGA. E.g., to read 16bit from FPGA’s address 0x1FC: pread( gmi, buf, 2, …

And could you also mention the BSP version you are using right now (output of uname -a ) ?

Best Regards,
Janani