On Thursday 29 October 2009 18:44:31 Stefan Roese wrote: > This patch fixes a problem only seen very occasionally on Canyonlands. > The NOR flash interface (CFI driver) doesn't work reliably in all cases. > Erasing and/or programming sometimes doesn't work. Sometimes with > an error message, like "flash not erased" when trying to program an > area that should have just been erased. And sometimes without any error > messages. As mentioned above, this problem was only seen rarely and with > some PLL configuration (CPU speed, EBC speed). > > Now I spotted this problem a few times, when running my Canyonlands with > the following setup (chip_config): > > 1000-nor - NOR CPU:1000 PLB: 200 OPB: 100 EBC: 100 > > Changing the EBC configuration to not release the bus into high > impedance state inbetween the transfers (ATC, DTC and CTC bits set to 1 > in EBC0_CFG) seems to fix this problem. I haven't seen any failure > anymore with this patch applied.
Applied to u-boot-ppc4xx/master. Thanks. Cheers, Stefan -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: off...@denx.de _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
