hi ,
we are using S34ML04G100 for our custom board. and the nand read speed is so slow, we've copyed NAND_GPMC_CONFIGi registers configure from kernel set to uboot , but the uboot nand read speed isn't improve,
then we 've measured the read timing from OEN pin, and we found that OEN pin high hold time is different from kernel. in uboot it's 410ns, in kernel it's 150 ns. and we also know that kernel read page use the same way as uboot, except use DMA.
Is anybody know why it's different? and how to improve the uboot nand read speed?
uboot nand read OEN time:
and the kernel nand read time:
