The offset of MTD regions must be aligned with erase sectors. So in order not to waste address space, avoid misconfiguration and eventually support storage media > 4 GiB, give the offset in sectors instead of bytes.
The offset of MTD regions must be aligned with erase sectors. So in order not to waste address space, avoid misconfiguration and eventually support storage media > 4 GiB, give the offset in sectors instead of bytes.