[U-Boot] LPC3250 NAND settings

[Abdullah Yıldız]

I use a board based on LPC3250 which is supported by u-boot 1.3.3.

u-boot, kernel, and rootfs reside in NAND FLASH memory.

I want to improve boot time. u-boot utilizes NAND memory by setting
the timing parameters as

SLCNAND->slc_tac = (SLCTAC_WDR(14) |
                    SLCTAC_WWIDTH(9) |
                    SLCTAC_WHOLD(3) |
                    SLCTAC_WSETUP(4) |
                    SLCTAC_RDR(14) |
                    SLCTAC_RWIDTH(9) |
                    SLCTAC_RHOLD(3) |
                    SLCTAC_RSETUP(4));

By changing these settings, at best u-boot approximately takes 6
seconds to finish, then kernel starts.

Is there any method to boot faster from flash? I know u-boot 1.3.3 is
now obsolete but I have to use it.

abdullah