On Thu, Oct 11, 2018 at 9:16 PM Miquel Raynal <miquel.ray...@bootlin.com> wrote: > > When using 2kiB-pages NAND chips requesting an 8-bit strength ECC, the > layout used is a bit particular and it happens that the ECC engine > tries to correct uncorrectable errors on empty pages, producing > bitflips. > > To avoid such situation, raw read support is added to the pxa3xx_nand > driver, and then used to re-read the page (in raw mode) upon > uncorrectable error detection to know if there is an actual ECC > mismatch or if the page is empty. This way we avoid seeing the > bitflips created by the hardware ECC engine. > > Once this done, we can revert the hack that was done in the driver to > enlarge the last spare area for this layout to 64B instead of 32B, > breaking U-Boot/Linux compatibility and preventing the BootROM to boot > from NAND. > > Thanks, > Miquèl > > > Miquel Raynal (3): > mtd: nand: pxa3xx: add raw read support > mtd: nand: pxa3xx: re-read a page in raw mode on uncorrectable error > mtd: rawnand: pxa3xx: fix 2kiB pages with 8b strength chips layout
Acked-by: Jagan Teki <ja...@openedev.com> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
