On Thu, Aug 4, 2011 at 1:55 PM, Arno Steffen <arno.steffen@xxxxxxxxxxxxxx> wrote: > While migrating from .33 to .37 kernel I found, that HW-ECC is used by default. > I found that this is set in omap2.c: > pdata->ecc_opt = OMAP_ECC_HAMMING_CODE_HW; > Unfortunatly setting it back to > pdata->ecc_opt = OMAP_ECC_HAMMING_CODE_DEFAULT; > doesn't prevent me from getting messages like: > > uncorrectable error : > uncorrectable error : > mtd->read(0xd18 bytes from 0x7eae8) returned ECC error > > So what else has to be set? I couldn't found it. swecc on .37 is broken (I'm not even sure hwecc works as I use swecc), you need at least 2.6.39.1 to use that. It is possible to patch .37 but I don't have list of needed parches, but maybe could get you that if you really need it (or look what changed under drivers/mtd between those versions yourself). > Other way maybe to keep it at HW-ECC. Is this significant faster than SW-ECC? > But howto get nandwrite (mtd-utils) or fw_setenv (uboot) to handle HW-ECC? > Do I have to use just the --noecc option? > > When using the fw_setenv command I get CRC errors in environment with next boot. Never tried hwecc so can't help you here. -- Gražvydas -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
