Hi Eric, On 14/11/2013 22:28, Eric Nelson wrote: >> I dont mind either way, but just an idea for discussion: >> >> What do you say to implementing the DRAM controller programming in >> SPL? That >> way, we can even do proper DRAM calibration on boot and other such >> nice things. >> And we'd also get rid of these static magic numbers all around. >> > > We can (and hopefully will very soon) implement some of the > configuration in C under SPL, but we can't (and shouldn't) get > rid of all of the magic numbers. > > Some of these numbers come from testing large numbers of devices > under a variety of temperature conditions. The best that the > automagic calibration facilities can do is set things up based > on nominal current conditions. > > That said, I'm sure we can cut down on the total number. > > My immediate goal is simply to set the stage for SPL and > a single binary.
I agree on this roadmap. Of course, it will be very nice to allow runtime DDR calibration, but we can do this in a second step. Best regards, Stefano -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: [email protected] ===================================================================== _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
