[U-Boot] LPC3250 NAND controller timings

[Александр Карпич]

Hello, list!

I have a development board based on LPC3250 and Samsung K9F1G08U0C NAND
flash. My CPU was worked at 208 MHz, so I calculate timings for LPC3250's
on-chip SLC NAND-controller.

SLCNAND->slc_tac = (SLCTAC_WDR(3) |
                    SLCTAC_WWIDTH(3) |
                    SLCTAC_WHOLD(1) |
                    SLCTAC_WSETUP(2) |
                    SLCTAC_RDR(3) |
                    SLCTAC_RWIDTH(3) |
                    SLCTAC_RHOLD(1) |
                    SLCTAC_RSETUP(4));


But u-boot speed is very slow.

How I can increase boot speed?
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