Roy, Yassin, On Mon, 08 Jun 2015 13:35:04 +0200 Roy Spliet <r.spl...@ultimaker.com> wrote:
> Hello Yassin, > > Op 08-06-15 om 12:48 schreef Yassin: > > Hi Roy > > Thank you for working on this, I would like to suggest if you could > > implement separate control commands to switch ECC and Randomisation modes > > per partitions. I know this is not the best approach but it will provide > > more controls. > Thanks for the suggestion. However, for now I do not see the immediate > need for this in U-boot. U-boot should really only care about one thing: > load Linux. Therefore, the only partition it needs to be able to read is > whatever partition is used for storing boot data on. And if we only care > about one NAND partition, we don't need per-partition settings. > I agree that it would be nice to have eventually, but I think this > problem first needs to be solved in Linux properly. Then in U-boot we > can sync MTD up with Linux and we get the support we need "for free". > I'd personally recommend to take this approach over now first hacking up > all sorts of new commands in U-boot, as the latter will create more > problems with syncing up MTD and doing the right thing on the longer run. Actually, the more I think about the more I agree with Yassin's suggestion. We currently don't have any standard way to attach a specific setting to a partition (even in Linux, and I hope I'll be able to work on this aspect soon). So for now, I really think we should reuse the existing/standard way of declaring partitions in u-boot (mtdparts + mtdids variables + the mtdparts command) and a sunxi specific commands to configure the ECC and Randomizer config. Once we have settled on something in Linux, we will be able to port it to u-boot and get rid of these sunxi specific command, but in the meantime this will allow us to boot a linux kernel (and even flash an SPL) from u-boot without introducing heavy changes in the u-boot MTD layer. Best Regards, Boris -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
