2011/8/5 Grazvydas Ignotas <notasas@xxxxxxxxx>: > 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 > Thanks for this advice. I will check this. Best regards Arno -- 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
