What read/write speeds should I expect from the i.MX28 NAND?
I'm only seeing between 1-2MB/sec which seems very slow. Read/write speeds from/to SD Card are quite a bit faster.
I've tried bumping up the GPMI clock from the default 24MHz to 48MHz and higher. The max speed increase was around 10%. This was with kernel version 4.10 and 4.19.
I'm using two S34ML08G1 NAND devices.