Seems like I found problem.
Look ret = io_remap_page_range(start, offset, size, vma->vm_page_prot); remaps
from "offset" which I got from pci_resource_start (curdev, IOMEM0); its ok
from first board where it eq 0x40000000 but on second it 0x40002040
Then I'm reading from x = mmap (NULL, MMAP_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0); with
shift 0x3C>>2 where I expect board register. But for second board x points to
0x40000000 or 0x40002040 or as I think remap_page_range or sonething realign
PAGE so x points to 0x40002000 or 0x40003000 and reading with shift 0x3C have
Am I rigth?